HomeMy WebLinkAbout1.0 ApplicationTOWN OF SILT
SITE APPLICATION FOR
WASTEWATER TREATMENT FAGILI1Y
AUGUST 2000
PREPARED Bv
ScHMUESER GORDON MEYER, INc.
I 18 WEST 5TH STREET. SUITE 200
GLENWOOD SPRINGS GO 81601
Cov er\2000-126-001 .site application
COLORADO DEPARTMENT OF PUBLIC HEAL TH ANO ENVIRONMENT
Water Quality Control Division
4300 Cherry Creek Driv e South
Denver , Colorado 80246-15 30 • APPLICATION FOR SITE APPROVAL FOR CONSTRUCTION OF:
A NEW DOMESTIC WASTEWATER TREATMENT PLANT
APPLICANT: To wn of Sil t PHONE: 970-876-2353
ADDRESS : 231 North Se venth P.O. Box 70
CITY , STATE , ZIP : Silt Colorado 81652
Consulting Engineer: Schmueser Gordon MeY.er, Inc . Phone : 970 -945· 1004
Address : 118 West 6'" Street Su i te 200
City, State, Zip : Gl enwood SQrin!!S CO 81601
A. Summaa of information re!!ardin!! new wastewater t reatment Qlant:
1 . Proposed Location (Legal Description): .51:!... 1 /4 , -1:!.L 1 I 4, Section 9
Township : 6 s Range : 82W County : Garfield
2. Type and capacity of treatment facility proposed: Major Processes Used Manual and mechanical bar screen ,
a~robic !!rit chamber, flash grit removal, flow measu r ement, extended aeration, activat ed sludge,
nitrification, denitrifcation, seconda!Jl clarification, di si nfection via chlorination .
Hydraulic : 750,000 gal/day Organic : 1873 lbs. BOD,lday
Present PE : 1700 Design PE : 7500 % Domestic : 95 % Industrial : 5
3. Location of Facility:
Attach a map of the area which includes the following :
(a) 5-mile rad i us : all sewage treatment plants , l i ft stations , and domestic water supply intakes .
(b ) 1 ·mile radius : habi table buildings, location of public and private potable water wells , and an
approximate indication of the topography .
4. Effluent disposal : Surface discharge to watercourse Colorado River
Subsurface disposa l : Land Applicati on : Evaporation:
Other (list):
State water quality classification of receiving watercourse(s):
Proposed Effluent Limitations developed in conjunction with the Water Quality Control Division :
BOD ~ 30/45 mg/l SS 30/45 mg/l Fecal Coliform 6,000/12,000 /100 ml
Total Residual Chlorine 0.5 mg/l Ammonia N/A mg/l Other pH (6·9)
5. Will a State or Federal grant/loan be sought to finance any portion of this project? No
6. Present zoning of site area ? ARRO
Zoning within a 1 ·mile radius of site ? Se e attached map i n Exhibit A
• 1 11camooe1 uom l20 00-1 26-0 01 .s11e app hcat1on
1 of4
WQCD-3a (Revised 2/99)
7.
APPLICATION FOR SITE APPROVAL FOR CONSTRUCTION OF NEW TREATIIENT PLANT
what is the distance downstream from the discharge to the nearest domestic water suppty intake?
NamG of Suppty:Citv of Rifte */. five mites downstream
Addresr of Supply:202 Raitroad Avenue. Rifte CO 81650
What is the d'istance downstream from the discharge to the nearest other potnt of diversion?
NamGof U3er: State Enqineer's Office
Addr63 of User:
8.What entity has the responsibility for operaring the proposed facitity? Town of Sitt
Who owns the tand upon which the facitity wiu be constructed? Town of Sitt
(Ptcasa attach copl6 of the document creanng aurhonty for the appllcant to construct the proporcd facittty at tnls $tal
10.Estimated project cost: S3.53 mittion
Who is financiatty responsibte for the construction and operation of the facitity? Town of Sitt
(Please see attached aqreement between Town of Sitt and Stiltwater Ranch for financinq of facitiw
Names and addresses of atl municipalities and water andlor sanitation districts within 5 mites downstream
of proposed wastewater treatment facility site.
Citv of Rifle. 202 Raitroad Avenue. Rifle. Colorado 81 650
(Attach a s€paratc shcct of paper if neccrsary)
ls the facitity in a 100 year flood ptain or other naturat hazard area?Yes
lf so, what precautions are being taken?
foot above the 1oo-vear floodolain.
Att finish ftoor etevations. too of concrete basins. etc.. will be one
Has the ftood ptain been designated by the Cotorado Water Conservation Board, Department of Natural
Resources or other agency?.Yes - FEMA
(ag.ncy Name)
lf so, what is that designation? Floodotain
Ptease identify any additionat factors that might hetp the water Quatity Contro[ Division make an informed
decisron on your apptication for stte approvat.This Dlant is a reotacement for the existine Town of Sitt's
laeoon facilitv which is aoDroximatetv 2sOo'uostream. The Dresent Town's laqoon facititv has been found in
non- comotianca for discharpe oermit narameters- The [ocation of the facititv allows the Town to consotidate
with the orooosed Sti[lwater Ranch develooment and Stiltwater MetroDolitan District.
I !cmp&t{om\2ooo-126-001.srl€ applElon
WQCD-3a {Revised 2/9o\
2ot4
11.
12.
B,
c.
APPLICATION FOR SITE APPROVAL FOR CONSTRUCTION OF NEW TREATMENT PljNT
lf the facility will be located on or adjacent to a site that is owned or managed by a federal or state.gency,
send the agency a copy of this application for the agency's review and recommendation.
Recommendation of governmental authorities:
Ptease address the fotlowing issues rn your recommendation decision. Are the proposed facitities consistent
with the comprehensive plan and any other ptans, policies. and/or regutations for the area, inctuding the 201
Facitity Ptan or 208 Water Quatity Management Plan, as they affect water quatrty? lf you have any further
comments or questions, ptease catt (303)692-3500.
Date
Recommend
AoDrovat
Recommend
Disaooroval Comment
Signature of
ReDresentative
ilanagement Agancy
City or Tom (lf site is inside boundaryl
County
Locll Heattn Authority
Watcr Quatity ManaSernent Ptannrng Agency
I cenify that I am famitiar with the requirements of the "Regutations for Site Apptications For Domestic Wastewater
Treatment Works ", and have posted the site in accordance wth the regutations. An engineering report, as described
by the regutations, has been prepared and is enctosed.
Typ€d Name
I ncamooel{om\2000-126-001 s[e aoox€non
WOCD-3a (Revised 2/99)
3 of 4
ATTACHMENT TO SITE APPLICATION
tn accordance with C.R.S. 1981, 25.8-702 (2)(a), (b), and (c), and the "Regutations for Site Apptications for Domestic
Wastewater Treatment Works", the Water Quattty Controt Division must determlne that each site location is consistent
with the tong range , comprehensive ptanntng for the area in which it is to be tocated, that the ptant on the proposed
site wiI be managed to minimize the potential adverse rmpacts on water quatity, and must encourage the consotldatlon
of wastewater treatment works whenever feasibte.
ln making this determination, the Division requires each appticant for a site approvat for a domestic wastewater
treatment works to suppty an engineering report describing the proiect and showing the applicant's capabitities to
manage and operate the facitity over the tife of the proiect to determlne the potentiat adverse impacts on water
quatity. The report shalt be considered the cutmination of the ptanning process and as a minimum shall address the
fottowing:
Sennce area definition inctuding existing and proiected poputation, site tocation, staging or phasinS, ftow/loading
proiections, and retationship to other water and wastewater treatment ptants in the area.
proposed site tocation, evatuation of atternative sites, and evatuation of treatment atternatives.
Proposed efftuent timitations as devetoped in coordination with the Division.
Anatysis of existing facitities within the service area(s).
Anatysis of opportunities for consotidation of treatment works in accordance with the provisions of 22.3(1 Xc),
inctuding those recommended in the water quatity management ptan, untess the approved water quatity
management ptan recommends no consotidation.
i t"iO"nce that the proposed site and facitity operations wilt not be adversety effected by ftoodptain or other
natural hazards. Where such hazards are identified at the setected site, the report shall describe means of
mitigating the hazard.
Evidence shatt be presented in the form of a report, containing soits testing resutts and design recommendations
and prepared by a Professionat Geotogist and a Geotechnicat Engineer, or by a professionat meeting the
quatifications oi both professional Geotogist and Geotechnical Engineer, with an aPPropriate tevel of experience
investigating geotogic hazards, stating that the site witl support the proposed facitity.
Detaited description of selected altematives inctuding legat description of the site, treatment system description'
derign capacities, and operationat staffing needs.
Legal arrangements showing control of site for the proiect tife or showing the abitity of the entity to acquire the
site and use it for the proleit tife. Approvat by the Division of an apptication for site approvat shall not be
deemed to be a determination that the proposed treatment works is or is not necessary' that the proPosed site is
or is not the best or onty site upon which to locate such a treatment works, or that tocation of a treatment works
on the site is or is not a reasonable pubtic use justifying condemnation of the site' Approvat by the Division shatl
onty be deemed to be a determination that the site apptication meets the requirement of this regutation 22 (5
ccR 1002-22).
lnstitutionat arrangements such as contract and/ or covenant terms which witt be finalized to pay (or acceptabte
waste treatment.
Management capabitities for contro[ing the wastewater toadings within the capacity timitations of the proposed
treatment works, i.e., user contracts, operating agreements' pretreatment requirements and or the management
capabitities to expand the facitities as needed (subiect to the appropriate, future review and approval
pr(rcedures).
Financiat systems which has been devetoped to provide for necessary capitat and continued operation'
maintenance, and reptacement through the life of the proiect. This woutd inctude, for exampte, anticipated fee
structure.
lmptementation ptan and schedute inctuding estimated construction time and estlmated start'up date'
above items may not be appticabte to address' ln such cases' simptyDepending on the proposed project, some of the
indicate the non-appticabitity of those.
t:u€mbelrom\2000'126{01.Slta e9plEton
WQCD-3a (Revised 2/99)
4ot4
APPLICATION FOR SITE APPROVAL FOR CONSTRUCTION OF NEW TREATIAENT PI.ANT
lf the facility will be located on or adJacent to a site that is owned or managed by a federal or 3trte a8fi9[,
send the agency a copy of this application for the agency's review and recommendation.
Recommendation of governmental authorities:
Ptease address the fotlowing issues in your recommendation decision. Are the proposed facitities consistent
with the comprehensive ptan and any other ptans, poticies, and/or regulations for the area, inctuding the 201
Facitity Ptan or 208 Water Quatity Management Ptan, as they affect water quality? lf you have any further
comments or questions, please catl (303)692'3500.
Date
Recommend
ADDroval
Recommend
DisaoorovaI Comment
Signature of
Reoresentative
l{anagement Agency
or Tom (lf site is inside boundary)
County
Health Authority
Management Ptanning Agency
I certify that I am familiar with the requirements of the "Regutations for Site APplications For Domestic Wastewater
Treatment Works ", and have posted the site in accordance w'ith the regulations. An engineering report, as described
by the regutations, has been prepared and is enclosed.
Typed Name
I Icamooeltom\2000-l 26-001.sile apph€tlon
WOCD-3a (Revised 2/99)
3 of 4
EXHIBIT A
Service area definition including existing and projected population, site location, staging or
phasing, flowiloading proiections, and relationship to other water and wastewater treatment
plants in the area.
please find enclosed the Town of silt comprehensive Plan Land use Map. This map
was adopted by the Silt Planning Commission on September 21, 1999, and revised May 2'
2OOO. This map depicts the urban growth boundary which, at the present time, defines the
Town,s Service Area. This map also shows the projected land use and associated densities
with future development within Silt.
Also attached is the Town of Silt population projectionsl, actual and projected, for a
2O-year period. Please note that, based upon a growth rate of five percent annually' the
profected population in the year 2O2O is slightly less than 5000 people' With a growth rate
of seven percent, the Proj population is slightly more than 7OO0 people. Also attached
in Exhibit L is a financial Proj rn, which conservatively projects a growth rate after the year
per year, and eight commercial EORs per year' Using this
analysis, the amount of res ial EoRs is 343O, which translates into a population of 9840.
Assuming 1OO gallons per capita day (gpcd), the 2Q-year projected flow contribution will
range from a low of 5OO,gpd to a high of 984,OOO gpd. Therefore, the plant has been
2OO2 of 2OO residential E
sized for a mid-range of 750,
will allow for future annexat
gpdexpandabletol.5MGD.Thedoublingoftheplantsize
and infill density to occur in the future'
Also attached in this ection is the Garfield county Zoning for the area surrounding the
Town of Silt and the wast ater treatment f acility.
I Western Slope Consu
rOM:lec\Oo.1 26 exh
(Mr. Davis Farrar)
EXHIBIT B
Proposed site location and evaluation of alternative sites.
The proposed wastewater treatment facility site is shown in Exhibit E. The proposed
site is downstream approximately 2500 feet from the existing Town of Silt treatment plant
site. The site is an ideal location for a wastewater treatment facility as it is bordered on the
north by l-7O and on the south by the Colorado River. The site is located further downstream
from the existing site and will allow intervening properties service into the new wastewater
treatment plant site. presently, the area around the proposed site is undeveloped atthis time.
The site is relatively well screened from the Town of Silt and other developed areas. After
a thorough geotechnical environmental assessment, floodplain and engineering analysis, the
Town had purchased this site.
This site is also do
conforming ISDS. This sit
the new wastewater treat ent facility.
nstream from the existing viking RV Park, which has a non-
will allow the Viking RV Park to abandon their facility and tie into
wastewater treatment facility. That existing infrastructure can be utilized by tying into the
interceptor sewer prior to the existing wastewater treatment facility and installing a gravity
interceptor to the new treatment plant site.
The other consideration for this site has been the on-going negotiations with the
Stillwater Ranch development. The Stillwater development is a large proposed Planned Unit
Development located adjacent to the Colorado River on the south side of l-70. The Town of
Silt and Stillwater have investigated varying alternatives for wastewater treatment sites'
Stillwater has investigated installing their own treatment facility located on the south side of
the Colorado River versus consolidation with the Town of Silt' After much negotiations' it
was determined that consolidation with the Town of Silt was the most appropriate alternative'
The selected site allows Stillwater access to the wastewater treatment facility'
Because of the above-mentioned reasons, the Town of Silt focilsed on this site as the
Geotechnical assessment and facilities analysis information is attached
to this report, which
purposes.
preferred site. Other
however, the Positive
the appropriateness of this site for wastewater treatment
including the existing treatment facility site, were evaluated'
Currently, the T of Silt infrastructure gravity-flows across l-70 to the present
!OMiIE\OO- 1 26.exh
of the selected site far outweighed any other site in this area.
EXHIBIT C
Evaluation of treatment alternatives.
Three treatment alter atives were considered, including the Aero-Mod proprietary
technology. Because of the problems the Town of silt is experiencing with their present
aerated lagoon system, the Town opted to eliminate lagoon technology' The layout for the
pretreatment alternatives are shown as Options 1 , 2 and 3 as attached in this section' The
footprint for all three technologies are attached for two phases' each at a 0'75 MGD phase'
This was to determine if the proposed site could accommodate wastewater treatment plant
needs for the Town of Silt well into the future (plant capacity up to 1 '5 MGD)' The attached
table shows the capital cost for the Aero-Mod, extended aeration and oxidation ditch
technology. The lowest price per gallon per day treated turned out to be the Aero-Mod
proprietary process at $4.7olgallon/day treated, or a totalcost of #3'52 million for a 750'000
gpd plant.
Also attached is a subjective comparison or matrix of issues between the Aero-Mod
oxidation ditch and extended air plant. Team meetings were held with the Town of Silt
Administrator, operator, Public works Director, Town Engineer and Mr' Jon Evans
representing the EPA. Jon has been involved beCause of the operational problems associated
with the non-conforming lagoon system'
After considering input from team members, the team decided the Aero-Mod process
met the Town of Silt's goals and obiectives. Those goals and obiectives included redundancy
of processes, high treatment standards, f lexibility and process operation' cost effective capital
and O & M costs, nutrient removal, small footprint, expandability' easy construction
installation, energy efficiency, easy proCess operation, simplification of ordering materials and
equipment and, finally, accelerated design time. Those goals and oblectives and the design
team recommendations were taken to the Town of Silt Trustees over several meetings' The
Town of silt Trustees concurred and recommended that the Aero-Mod process be selected'
AttachedisaproposalfromAero-ModfortheTownofSiltwastewatertreatment
facility. This proposal describes in detail the Aero-Mod facility'
LOM:l6c\OO'l 26 6xh
aeration activated sludge and, finally, the oxidation ditch
TOWN OF SILT
]tnr
SUE.,ECTVE COMPARISONS
APRIL gTH
AEROMOD
@mmon wall construction
stainless steel
no mo/irE parts
los labor
small fooprint
ntrtient removal
orplete redJndansy
short lead time
eary intallation
ergandable
lwodorcorPlait
errqy efficient
e8ly prooess to operate
rqkwith one
lordesigntime
lowor O and M
OXYDATION DITCH
camPus design
varies
manY moving Parts
medium labor
large footPrint
good nutrient removal
redundancY
longer lead time
nrore comPlex concrete work
exPandable
can have odors
firoderste efficiencY
rue comPlex to oP€rate
rnmY manufacturers
nue design time
h$l€rOandMexPense
EXTENDED AIR PI.ANT
campus design
varies
many moving Parts
high labor
largefooQrint
little nutrient rernoval
redundancY
lorg lead time
more complex concrete $ork
e:Qandable
Itrodor Problerns
moderate efhciencY
rue cunPlexto oPeate
rrrymruffirrr
nsc decimtim
hi$terO and M ePense
-"
-/'r/?rf, t r
..':)
':.,1fu:'y'"
' ,i 2'J . l'/ rttt
- ..i.):t.) !t't)rr Jb
/", !
't'
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Town of Silt Colorado
Comprehensive Performance Evaluation
JanuarY,2000
Introdustion
Jon E.,rans, Contract Operations Specialist from Red Rocks Community College, -conducted a
Comprehensive Perfonnance Erraiuation (CPD for the wastewater treatrnent facility of the Town
of Sih in January 2000.
CPE s are conducted on wastewater treatment facilities as a means of assessing whdher
factors associated with the administraion, design, operation or maintenance are affecting the
optimal performance of the facilities related to effluent quality. The CPE is based on the EPA
Handbook: Retrofrttin g POTWs.
A CpE is used to help utilities daermine if a plant is capable of meeting State and EPA
requirements for wastewater treatment without investing in major facility upgrade. The
Operations Specialist also gains valuable information about design limits and operational
practices, as well as becoming acquainted with operators and administrators'
The CpE generates a prioritized list of perforrnance limiting factors (PLF's), which the facility
should addresl to mitigati treatment plant problems in achieving maximum treatment and to
prevent violations.
The CPE was conducted over a short period of time and does not represent a dAailed
engineering shrdy of the facility. The CPE- was prompted by request from the Town of Silt'
Facility Information
The wastewater treatrnent facility is an aerated stabilization pond. It was designed for a 30Jay
average daily flow of Q.236 frAdp hydrautic flow and 394 lbs.BOD 15 per day organic loading'
The effluent from the plant discharges to the Colorado River.
The Sih Facility consists of the following:
Influsgt flow meter with totalizer & recorder
Primary lagoon @ 1,440,000 gal.
6'dryth.
6.1 dap Td.
4-5Hp surEce aerators
0.84 Ac. sutface area
Secondary lagoon @ 2,100,000 gal
6'depth
8.9 dap Td.
4- 3 Hp zurhce aerator
l.l Ac.
)o
Jo
EXHIBIT E
Analysis of existing facilities within the service area(s).
Attached is a map showing the existing water and wastewatertreatment facilities
within a five-mile radius of the proposed site. Also attached are the approved Well Permits
within a one-mile radius of the proposed site. An analysis of the existing Town of Silt
treatment facility is attached. The EPA conducted a Comprehensive Performance Evaluation
forthe Town,s wastewatertreatment facility. Mr. Jon Evans, contract operations specialist
f rom Red Rocks Community College, in conjunction with the EPA, conducted a
Comprehensive Performance Evaluation in January, 2OOO. The CPE is based on the EPA
handbook "Retrofitting POTW". Based on this evaluation, the Town of Silt elected to abandon
the present lagoon technology and proceed with the new Aero-Mod technology'
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TDIJN OF SIL T
CoMprehenslve Plan Lanai
Use Map
Aolopteol by Silt Planning
COMMlsslon
SepteMber 21, 1999
Revised May 2, 2000
Co.rtography1 IJestern
Slope Consulting
This Mo.p In Intended to be
used only In conjunction
with the Silt CoMprehenslve
Plan Dated 1996, AMencled
SepteMber 21, 1999,
AMenoleol Mo.y 2 , 2000 I
MUNICJP•L LIMITS
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Garfield County Zoning
Surrounqing Silt, Colorado
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Town of Silt Population Projections
Actual & Projected
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----7°/o Growth
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Year
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•
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Silt Population Actual & Projected
1980 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
7% 923 1,095 1,131 I, 133 1,154 1,181 1,2 48 1,294 1,399 1,612 1,651
18.6% 3.3% 0.2% 1.9% 2.3% 5.7% 3 .7% 8 .1% 15.2% 2.4%
1980 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
5% 923 1,095 1,131 1,133 1,154 1,181 1,2 48 1,294 1,3 99 1,612 1,651
18 .6% 3.3% 0 .2% 1.9% 2.3% 5 .7% 3.7% 8 .1% 15 .2% 2.4%
1980 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999
3% 923 1,095 1,131 1,133 1,154 1,181 1,24 8 1,2 94 1,399 1,612 1.651
18.6 % 3.3% 0 .2% 1.9% 2 .3% 5.7% J.7% 8.1% 15.2 % 2.4%
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
7% 1,766 1,890 2,022 2,164 2,3 15 2,477 2,651 2.836 3,035 3,247 3,474
7 .0% 7.0% 7 .0% 7 .0% 7.0% 7.0% 7 .0% 7.0% 7 .0 % 7.0 % 7.0%
2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
5% 1,733 1,820 1,911 2 ,006 2 ,107 2 ,212 2,323 2,439 2,561 2,689 2,823
5 .0% 5.0% 5.0% 5.0% 5.0% 5 .0% 5 .0% 5.0% 5.0% 5.0 % 5.0%
2000 2001 2002 2003 2004 2005 2006 2007 200 8 2009 2010
3% 1,700 1,751 1,804 1,858 1,914 1,971 2,030 2,091 2 ,154 2,218 2,285
3.0% 3.0% 3.0% 3.0% 3 .0% 3 .0% 3.0% 3.0% 3.0% 3.0% 3.0%
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021
7% 3,718 3,978 4 ,25 6 4,554 4,873 5,214 5,579 5,970 6,388 6,835 7,3 13
7.0% 7.0% 7 .0% 7.0% 7.0% 7 .0% 7 .0% 7 .0% 7.0% 7.0 % 7.0%
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021
5% 2,964 3 ,113 3,268 3,432 3 ,603 3,783 3,973 4,171 4,380 4,599 4,829
5.0% 5.0% 5.0% 5 .0% 5 .0% 5.0% 5 .0% 5.0% 5.0% 5.0% 5.0%
20 11 2012 2013 2014 2015 2016 2017 2018 2 019 2020 202 1
3% 2,354 2,424 2,497 2 ,572 2 ,649 2,728 2,810 2,895 2,981 3,071 3,163
3.0% 3 .0% 3.0% 3 .0% 3.0% 3 .0% 3.0% 3.0% 3.0% 3 .0% 3.0%
EXHIBIT D
Proposed effluent limitations as developed in coordination with the Division.
Attached are the discharge limitations proposed for effluent discharge to the Colorado
River. Please also note that we have included the discharge parameters for reclaimed water
usage. The Town of Silt has considered working with Stillwater Ranch to utilize the effluent
for golf course irrigation. These decisions have not been made as of yet and will be part of
the on-going negotiations between the Town of Silt and Stillwater Ranch.
LOM: loc\Oo- I 26. exh
TOWN OF SILT
]rwr
UISCHARGE UTITANONS
APRIL gTH
DISCHARGE UIITANOHS
DISCTU\RGE TO RIVER RECLIreD WATER
PARAMETER S DAY AVE 7 DAY AVE R'BLIC USE Gcl-F COLRSE
FLOW 750,000
BOD 30 rc/L /+sl/lci/L 10 ltci/L asre/L
TSS 30 MG/L 4sltc/L 10 rrc/L 45 rer.
FECAL COLIFORH dM 12OO 22 B
TOTALRESICI,,ALCHLORhE 0.5 IEIL
OILANO GREASE 10 iTC./L
AMIIIONIA NO{E
{
:
6.59
Settling pond @470,000 gal
6'depth
1.9 days Td
0.32 Ac.
Construced Walands of questionable condition
* Chlorine coutact basin
4,180 gal
0.42tu. Td @ peak flow of .236MGD
The Silt facility is required to meet the following treatment standards:
FIow 0.236 MGD (30day avg.)
BOD/5 30 mg/t (30 day avg.)
TSS 75 mgfi (30 day avg.)
45 mg/l (7 day avg.)
110 mg/l (7 day avg.)
Fecal coliform 6,000 cFU / I00mt (30 day avg.) 12,000 cFU / l00ml (7 day avg.)
TRC 0.5 mgfl daily max.
pH
o&c
6.0 su - 9.0 su daily min. / max.
l0 mg/l daily max.
In addition to these limits, the sampling program includes:
Influent FIow continuous recorded measurement
Influent FIow BOD/5 - monthly composite
Influent Flow TSS - monthly composite
EffluentFlow 3XAryeekiqstarr.taneous measurement
Efluent FIow BOD/5 - monthlygrab
Efluent Flow TSS - monthly grab
Effiuent Flow Fecal Coliform - monthly grab
Effluent Flow Total chlorine residual - weekly grab
Effluent Flow pH - weekly grab
O Effluent Flow Oil & Grease - weekly visual
Effluent Flow Total dissolved solids - quarterly grab
O Raw Water Source Total dissolved solids - quarterly grab
Performance Evaluation
Plant performance is based on the previous twelve months data (l/99 - lU99) genrerated by the
plant's sampling and testing program. These data are used to represent t}te current operational
performance relative to optimum capability. The CPE seeks to establish plant ability handle
current loading and to effectively remove solids from ttre wastewater stream.
Hydraulic and Oreanic Influent Loading:
The BOD/5 loading of 209 lbs/day is at least 20% lowerthan the projected BOD/5 of 288
lbs/day. This projeaion is based on a population of 1,600 and a contribution of 0. I 8 lbs/day per
person. This may be due to non-representative sampling (e.g., during the day when BOD is
higher )
The reported flow of l25,000gals/day is within acceptable ranges (+l- 30o/o of 100
gals/daylperson), based on a population of 1,600 assuming 100 gals/cap/day.
The TSS of 209lbs/day is within acceptable ranges based on organic loading to the plant. (eg. +l-
30% of influent BOD/5 loading).
Industry Contributions:
The Sih Plant has no industrial contributors. The Town should consider doing a survey of local
business and identifu if there is any need for pretreatment such as restaurart grease traps.
Performance Assessment:
This POTW is considered a small sized facility. Microsccrpic exams should be performed if the
plant is having problems. The operator is not meeting this requirement because of lack of
equipment. This inabilitv could cause improper operational decisions to be made.
Operators are not performing dissolved oxygen profiles ahhough equipment exists. The lack of
this information could cause imprcrper operational decisions to be made.
This POTW has been in violation of fu monthly BOD5 permit requiremert eight (8) months of
twelve (12).
This POTW has been in violation of its monthly TSS Permit requirement six (6) months of
twelve (12).
^^ There is operational flexibilrty in the stabilization ponds:
]UifitV to ,tiliru series and parallel modes does exisr but is not utilized. This option could be used
to enhance the stabilization pond's capabilitv.
Ability to utilize variable level draw-offmodes also exists but is not utilized. This option could
also be used enhance the stabilization pond's capability.
The existing ponds currently in operation are described as follows:
Pond I - Light brovrrn to green with lots of solids mounded around the influent line and partially
out of the water. This creates a vector attraction problem and does nothing for the treatment of
these solids. There are solids suspended, mats of rags and grease clinging to the edges, slight
soapy water odor.
Pond 2 - Light brown to green, some duck weed sludge around edges, rags and trash (plastics)
Settling Pond - Dark green to clear with some septic odor.
CV2 Chamber -Serpentine configuration, V-notch weir, clear with some septic odor.
Site is fenced, well kepg there is a boat available.
Plant Maintenance:
O Existing plant equipment was observed to be functioning properly in a reliable and consistent
manner. One aerator is dead in the water and the spare is out for repairs. There seems to be a lack
of manpower available for proper maintenance of this facilrty. The age of the equipment is such
that there should be a streamlined method for repair/replacement of equipment. There is no
written schedule for or record of maintenance of equipment.
Plant Administration:
The salary for the Superintendent ($27,000) is less than the anticipated pay scale, S35,421 -
543293 for this geographic zone (1989 WPCF Survey). A low pay scale does contribute to plant
staffmorale problems and poor plant performance.
This POTW has received repeated notices from the CDPH&E about poor effluent quality.
Some suggested corrective action and some were responded to wittr promises of corrective action.
None of these corrective actions appear to have been performed.
Unit Process Evaluation:
Unit processes are evaluated with respect to their capacity to handle current loadings, and to
assess their potential capacity. The ability of the facility to hancile t}re current loadings is assessed
^ and the plant is categorized Tlpe l, 2, or 3, as described below:
Ot*. l: Unit processes are adequate
(
Type 2: Unit processes are marginal
Tlpe 3: Unit processes are inadequate
The point score system for a stabilization pond POTW is as follows:
Tlpe I ->}0points
Type2=5-20points
T1pe3=<5points
Plant Desisn:
This treatment system is rated type l. The erraluatiou indicates that the major unit processes have
adequate capability. The following parameters used for scoring the capability ofthe system are
considered:
* BOD/5 loading of 107 lbtacldz... ........7
* Detention time of 3l days @ current avg. da. flo...... ............3
* Threeponds in series... ...........10
*Lengthtowidthratioof 1.7 -... ...........0
+ Short circuiting ratio of 0.1 - (this is a negative faaor)... .......-l
' Oxygen availability 1.3 #OZ / # BODS... ........2
* Mixing energy 8 hp / MG... .......2
* Flexibility to operate in series and parallel available ... ...3
r Variable level draw-offarrailable ............3
The Silt treahent facility unit processes were erraluated with respect to their ability to handle
current loadings and to assess their potential capability. This facility scored 28 poirts. The results
of the unit process evaluation indicate that the overall rating for this POTW is Tlpe l. The
erraluation has indicated that the existing major processes are adequate.
Infl uent'yalues comparison-
Actual
0.125
208
Wetlands
,.t""rb"r I
1..4-tf .^ rr^t^-J^ t,--- ---l
O
Performance Potential Graph:
To assess the plant capability relative to'various loadings a performance potential graph is used.
This graph depicts t}re assessed capability of the plant to meet desired performance. The major
treatment units and evaluation parameters are listed on the left and a Emge of evaluated influent
flows and loadings are listed along the top. The broken vertical lines depict both the current and
design flows for the facility. The shaded bars depia ttre evaluator's rated capabilities of the plant
trnits. When interpreting the graph it is important to remember that the projected capability
rePresents the evaluator's judgment conceming performance capability taking both design and
operarional parameters into account.
TOWN OF SILT
Wastewater Treatment Lagoons
Performance Potential Graph
Des ign
% 20% 40% 00% 80% 100% 120% 140% 100% 180% 200%
(MGD) 0 .0472 0 .0944 0 .1416 0 .1888 0 .236 0.2832 0 .3304 0 .3776 0 .4248 0 .472
(a) (lbs . BOD) 79 158 236 315 394 473 552 630 709 788
Unit Process
Facility Effluent
Flow, MGD
( b) 53.0%
Av g. 0 .12 5
( c) 101 .7%
Peak 0.24
Facility Detention
Time, Days
( c) 188.8%
35.6
Organic Loading
lbs BOD I day
( d) 52 .9%
200
Aerated Cells
Organic Loading
lbs BOD/ ac I day
( e) 106.8%
107
Available Oxygen
lb 02/ lb BOD
er l 193 .3%
3 .5
0 .0% 500% 100.0% 150.0% 200.0%
e • •
PERFORMANCE POTENTIAL GRAPH DATA SHEET .
FOR MECHANICAL SURFACE AERATED LAGOONS
(a) Based on permitted capacity or : ~-236 MGD and BOD Limit or : I 2001MG/L
( b ) Based on avg . dally Inn . now or : 0 .125 MGD, total cell volume or 4.447 M gals,wllh populallo·n of: I 1,a:x>I
Producing a per capita now or : 78 gals/day/capita
( c ) Based on actual BOD loading or : 200 MGIL
( e) Based on acutal HP of surface aerators 32 Total HP = 24 WHP 724 Total 02 applied
( d) Based on actual BOD loading and the aerated pond surface In acres 1.95 with loading design of~oo lb BOD/acid applied
Enter design critera for oxygen comparison here : 1. 7 5 lb 02 / b OD ( This number varies depending on pon depth, use Table 2-22 :
Enter design critera for BOD comparison here : ~ lb BOD I ac I day applied (Use Table 2-22 -based on winter temperature )
Enter the design capacity of the plant he
Enter the maximum daily average(peak
Enter the current daily average flow her,
Enter dimensions of Aeration Pond #1
Enter dimensions of Aeration Pond #2
Enter dimensions of settling pond.
Enter dimensions of CL2 contact basin
Facility total cell capacity of I
re.
flow here .
i .
4.447
0.236
0.24
0.125
183
240
70
16
Enter Town population here 1600
MGD . Designed influent BOD limi 200 MG/L
MGD . Enter the design BOD limit here : 394 lb BOD/ d
MGD . Actual BOD loading here. 200 MG/L
Length 201 W idth 6 Depth = 1.651 Mgals
Lenght 201 Width 6 Depht = 2.165 Mgals
Leng ht 201 Width 6 Depth = 0.631 Mgals
Leng ht 16 Width 2 Depth = 0.004 Mgals
ce area of 2.27 acres
Detention time
Mgals and a total surf~
Facility I 35 .6,days Aerated cells 30.5 days CL2 basin I 44lminutes
Design 18.8 days Aerated cells 1.95 acres
Mechanical Surface Aerators Oxygen Availability 724 lb 02/day
Enter aerator HP from pond #1 I 20lEnter aerator HP from pond #2 12 which f -24JWhp
AOTR = (SOTR)a (B Csw -Cl.) 0 T-20 This is the formula fordetermininf ... _--·-·-·-·;pr·· .. -··-·-··---.
Cs 12.07 7.12 AOTR = · " ' ' ' '
Enter the elevation in feet of the facility here 5432 O T-20 = 1.07 4
Enter the value of alpha(a) from table E-1 0.90 Enter SOTR from table 2-3
Enter average DO from aerated ponds 2.0 mg/I
Enter the DO saturation level and wastewater temp rom a e -2 Cswf 8.68f mg/I T1 23f C
e • Dl=Pt=n1:n~ fJ. Ml"l=.-...,,..,Tl=f\ITI fJ.' ~p A Dl-1 •
'-......_.
During the evaluation, potential performance limiting factors in the areas of design,
administration, operation and maintenance were addrlssed. The factors identifiej were classified
as d B, or C as follows:
A - Major effect on a long term repetitive basis
B - Minimum effect on a routine basis or major effect on a periodic basis
C - Minor effect on performance
The following A B and C factors were identified during the er"aluation and relate to achieving
consistent effl uent comp liance.
..A" FACTORS
Each faaor below received an (A) rating indicating that the factor potentially has a major
effect on a long ternr, repetitive basis.
ADMIMSTRATION - PLANT ADMINISTRATORS _ POLICIES
Policies is cited because the administration apparently does not support the plant. A disregard
for the quality of_the receiving stream is evidenced by repeated violations, *n mU.a promis=es of
repairs and modifications, and delaying tactics relating to future construction.
ADMIMSTRATION - PLA}IT ADMIMSTRATORS - POLICIES
a Appropriate staffmembers do not have sufficient authorityto make required decisionsUfegarding operation, maintenance, and or administrative decisions. Managlment's policies have
caused a situation, which is preventing the operator from performing o""Jrr"ry testing andoperational process control changes, which could prevent violations.
OPERATION - APPLICATIONS OF CONCEPTS AND TESTING TO PROCESS
CONTROL
The erraluation indicates that the staffis either unable to get adequate manpower to make
proper Process control adjustments or deficient in their knowledge of wastewater treatment or
interpretation of process control testing such that improper procJss control adjustrnents are made.Inproper sampling technique is indicated by the iur"tts of gOpls testing."The 209lb/day
reported BOD/5 is at least ZlYolower than 288 lb/day projected BOD. Thi+rojection is based on
a population of 1,600 assuming 0.18 lb/caplday.
Capability to operate the stabilization ponds in a variable level draw<ff mode exists yet is notutilized. This orption could be used to enhance the stabilization pond's capabilfi.
Capability to oPerate the stabilization ponds in a series and iarallel *oau u*i"t yet is notutilized. This option could also be used to enhance the stabilization pond's capability.
OPERATIONAL - TESTING - PROCESS CONTROL TESTING
Microscopic examinations of the biomass should be perfiormed ifthe plant is having
problems' Operators ar! not meeting these requirements because of inadequate equipmEnt. The
lack of these tests could cause improper operational decisions to be made.
Plant operators do not monitor dissolved oxygen levels in the aerated ponds. Dissolved
-
ox-vgen should be monitored in the ponds at least three times a week and iecorded to determine
ltrends, These could be of importance when diagnosing deteriorating conditions and making- operatlonal conUol decisions.
O DESIGN - U*tT DEsIGN ADEQUAcY - INFLUENT LINE (S)
The three northern most influent lines should be extended down and out closer to t}te center
bsttom of the ponds. Accumulation of sludge above the water surface on the banks of the ponds
causes odors, vector attraction and reduces the ability of the pond to digest the sludge.
Additionally, the mettrod of pushing the sludge out into the ponds with equipment jeopardizes the
integrity of the liner.
DESIGN - UMT DESIGN ADEQUACY - PRELIMINARY
Design feattres of the preliminarytreatme,rt unit may cause problems in downstream
equipmeut or processes, which leads to degraded plant performance.
There is no barscreen, which is essential in a lagoon system to protect the aerators from
damage due to accumulation of rags and trash on tle equipment and in the transfer structures.
The accuracy of the flow measuring device is zuspect based on unusually high periodic flows
recorded due to blockages in the flume throat and bachrater in the flume tail piece.
DESIGN - UNIT DESIGN ADEQUACY - CONSTRUCTED WETLA}IDS
The constructed wetlands are a feahrre that could be used to provide higher quality treatment.
The units need to be leveled, the flow structures repaired and the outfall line repaired so that this
feature can be optimized. The engineering is claimed to have been done in a 1997 letter to the
CDPH&E.
.ts,'FACTORS
Each factor below received a @) r*.ing indicating that the factor potentially has a minimum
effect on a rotrtine basis or a major effect on a periodic basis.
DESIGN - UNIT DESIGN ADEQUACY - DISINFECTION
The fecal coliform test exceeded its monthly permit value one (l) time in the last two (2)
years. This indicates the need for increased maintenance of the chlorine feed equipment and
contact chamber.
MAINTENAI{CE - CORRECTN/E - CRITICAL PARTS PROCUREMENT
Delays in gelting replacement parts caused by procurement procedures resuh in extended
periods of equipment downtime.
ADMIMSTRATIVE - MORALE
The salary $27,000 for the superintendent is less than the anticipated pay scale, $35,421 -
543,293 for this geographic zone (1989 WPCF - waste{ rater operations personnel survey), A low
pay scale may contribute to plant staffmorale problems and plant performance. This combined
with frustration from lack of help and chronic violations could have significant impact on plant
compliance.
..C'' FACTORS
Eadr factor listed below received a "C" rating indicating that the factor potenl.ially has a minor
effect on plant performance.
DESIGN _ MISCELLANEOUS - EQUIPMENT ACCESSIBILITY FOR
MAINTENANCE
Floating aerators require adequate staffto service, maintain and replace. Unless plant
compliance is a priority, excessive downtime and/or inefficient proceis performance will result.
MAINTENANCE _ GENERAL - STAFF E)GERTISE
The Town staffdoes not possess the necessary expertise to keep the equipment operating and
to make equipment repairs. This lack of staffexpertise adversely impacts plant pr:rformance.
MAINTENANCE _ PRE\IENTATTVE - LACK OF PROGRAM
The absence or lack of an effeAive scheduling and recording procedure causes unnecessary
equipment failures or excessive downtime that results in plant performance or reliability
problems.
O&M MANUAL - ADEQUACY
Inappropriate guidance provided by the non-existent O&M manual resuh in p,oor or improper
treatment that could have been avoided.
4.
t.
L.
3.
5.
6.
7.
Town of Silt Comoosite Correction lProgram
The Town of Silt needs to make sewer plant compliance a priority.
Create a method by which appropriate staff members can make required decisions
regarding operation and maintenance.
Provide training to multiple staffmembers in the proper opo:ation of the wastewater
facility so that the plant will have continuous operation regardless of staff changes or
leave time.
Purchase an adequate microscope and train staff in the proper use and analysis of the
microbiology of lagoon systems.
Plant operators should monitor dissolved oxygen levels in the aerated ponds at least
three times a week and record to determine trends.
The three northern most influent lines should be extended down and out closer to the
center bottom of the ponds. Veriff the integrity of the liner md make necessary
repairs.
Install an adequate headworks including barscreen and flow measuring device with
totalizer and recorder.
8. Repair the constructed wetlands; level the beds, repair the flow structures and outfall
line so that this feature can be utilized.
9. Schedule and perform increased maintenance of the chlorinr: feed equipment and
contact chamber. Obtain a pump & adequate hose to recycle the solids from the
contact chamber back to the head of the first basin.
10. Establish a procedure and priority for getting replacement parts in a timely manner.
11. Establish a preventative maintenance program to include trerining of multiple staff
members capable of making repairs to equipment.
12. Create an adequate O&M manual so that any trained employee, existing or new could
propedy operate the facility.
j_]
o-J
o
EXHIBIT F
Analysis of opportunities for consolidation of treatment works in accordance with the
provisions of 22.311)(c), including those recommended in the water quality management plan,
unless the approved water quality management plan recommends no consolidation.
The proposed site offers several consolidation opportunities. First, the Town has been
discussing consolidation with the Viking RV Park which has a non-conforming ISDS.
Secondly, the Town of Silt is consolidating with Stillwater Ranch developrment and Stillwater
Metropolitan District for wastewater treatment facilities. The nearest upstream and
downstream other wastewater treatment facilities are the Town of Nevv Castle facility and
City of Rifle facilities, including the North Rifle plant the South Rifle plant and the Cottonwood
Mobile Home Park plant. All these facilities were deemed too far away to discuss further
consolidation opportunities and were not considered economically viable at this time. The
Town of Silt has an approved 201 Plan, which discusses the viability of further consolidation
in more detail. That 201 Plan is attached.
LOM:lec\oo-126 oxh
l;) EeErvr
eit ffin r r aooo M'
,/
i' 2ol wASTEwATER FACTLTTTES PLAII
SILT, CoLoRADO
(
JULY,1979
TABLE OF CONTENTS
of Tables'
of Figures
Sumuary, Conilusions and Recoonendattons
InE. roduc ti'on "
Ef f Iueit Li'nitations" '
and PIan Selection
I
Copy of NPDES Permit Nuober CO-0029181'
A
B LeEter Requestlng Variance to Dlscharge
Suspended Solids Limltations
CorresPondence froo Agencles
'SIGNOFF LETTER" in Conpliance with
Notlce of PubIlc Hearing and Proof
Record of Public Hearing
Resolutlon of Int'ent
ResoIutlon Concernlng DeveloPoent on Prlme Agrlcrrl tural
Lands
FIora and Fauna Exlsttng
PAGE
i
ilisE
ist
ZL
Lq
47
50
53
55
57
Exhlbl r
Exhibl t
Exhlblt
Exhlbi t
Exhlblt
Exhlb 1 t
Exhlblt
D
F
c
H
SiltrColor:ado
Peroit fot:
Ot'{B Clrcutar A-95
of Publicatlon
slLtln and AroundI-
TABLE
I
2
3
4
5
6
LIST OF TABLES
Ef fluent Quality Restrlctions..
/Hlstorlc Populatlon....
Dall! Wastewater Flows
WdsEewater Quality Parameters
IPolulatlon Forecasts
Ranking of Flnal Alternacive ProposaIs..
PAGE
4
7
15
15
2L
47
LIST OF TiGURES
FaciIiEy Planning Area.
Land Usd PIan llaP
l.lasEelraEer Col I ectlon SYsten.
Diurnal Flow Pattern../
Populatlon Projection. .. .
Proposed Land Appllcatlon Sice & FIood Plain
:
Proposed Expansion of -he l'Iastewater Collection System'
Proposed Wascewater Treatuent Facilities
PAGEFIGURE
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3
4
5
6
7
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l7
18
23
37
45
5t
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11
,? suMI,rARy, coliclusroNs AND RE..MI'IENDATT,NS
The Eown of sl1t's wastet,aEer treatoent faclllttes are inadequat'e for
oeetlng che Federar and sEate requlre.enrs for secondary treaEmen.' I'Jlth deveL-
opoenE of the surroundtng arear s vast energy resources and the projected lncrease
inpopulaElonaccoEPanylnglc,slltshouldexperiencesubstantlaIgrowth,and
1rs already overloaded nastewater Ereat'ltrent sysEem siLl requlre expanslon' The
alternaEives considered for provlding the necessary EreaEmenE capacity wlEhin
rhe Planning Perlod lnclude:
I) a ne!, mechanical treatnent' plant;
Z) uPgrading the existing iagoons;
3) new aeraced stabillzaEion ponds;
4) tand aPPIication'
Renovatlon of Ehe exlstlng
based on cost-effecEiveness and
SecEion 7). Although excessive
ff '*:' ::::i"::,::":':"::":;
lagoons 1s favored over, che other alEernaEes
considerarion of some additional factors (see
lnfiltratlon and infloe' were noE found Eo exlst'
s wast,elraEer collectton system are also called
Ehe Pro jecE, is estimat'ed to be S593 '000'
AfterreviewandapprovalofthisfacilitiesplanbyEheEol,n,Ehestate
and rhe EpA, applicatlon should be oade for step II and sEep III funds to deslgn
and consErucE Ehe proposed faciLities' Tiueliness is iruportant' in naking and
processingtheapplicatlonsbecauseofEheoverloadedcondirionswhlchare
evidenE in Ehe e*i,SCing wasEewat'er treaEoent facilitles'
-t-
e r:r.t:::l:::.". in Garrierd county, colorado, at the easEern end or the
Cactus VaIIey. This valley is a crescent-shaPed alluvial fan along the Colorado
River bordered on the norEh by the Grand Hogback'
In I95I, a SaniEation DisErict was formed and funds were generaEed to pay
for the constructlon of sewage collect,ion and treattrent facilities for the
town. The Ereatment faciiity, an Imhoff tank, remained in operation until
1970, when corfsEruction oi InEerstate 70 forced its abandonnenE' The wastewater
lagoons whi;h.vere subsequently built are now overloaded and in poor condiEion'
resulElng ln periodic violaEions of Ehe discharge perniE' Thts facility plan
reco*-ends upgrading the existing EreaEnenE systetr.
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3. EFFLUENT LIMITATIONSe
WATER QUALITY OUECTIVES
Dissolved Oxygen
pH
Temperature
Oll and Grease
Fecal Collforo
Turbidi ty
Toxlc materlals
rhe 208 Areawide wlter Quallty Management plan designaEes Ehe segueng of
the coLorado River above Grand Junctlon as belng "effluent limlted". Deslgn of
auy publicly.owned EreaEnent works Eust provide for appllcation of the best
pracEicable waste Creatment technology.
The town of SilE was lssued a dlscharge permit under the Natlonal pollutant
Dlscharge Ellninatlon systen on February zz, Lg77. A copy of the pertrit, whlch
explres December 21, i981, ls lncluded In the Appendlx. rt authorlzes the
treatEent faelllty to release an effluenE subject to the quallty lloltatlons in
Table I' The perulE also ldentlfles uonitorlng and operatlonal requlrements.
Silt lies within rhe sEudy area for which a 303(e) Water QuaIiEy Manage_
ment plan was writren.(2).
Thls plan recommended Ehat the tosnr s aerobic lagoon treaEtrent system be
upgraded by adding aeration, flltrarlon, and disinfectlon facllltles. Labora-
Eories Eo serve Ehe treatment planEs within the subbasin of inEeresg were pro-
posed tn Rifleiand ColIbran.
,/Above tts confluence with Parachute creek, che colorado River has been
glven a B-l Stre"' classification. To be suitable for all uses excepc prioary
contact recreatlon, iEs water quality paraneters rnust meet Ehe following pre-:scribed sEandards:
ITEM STANDARD
6 ag/ I uinlou,n
6.0 - 9.0
68o F. maxiroum; 2" F. uaximun change
No film or other discoloraEion
1000/l0O nr
No lncrease greater than I0 JTU
Free frou
TABLE I
EFFLUENT QUALITY RESTRISTIONS
PARA.YETE-B
B0D5
Total SusPended Sollds
Fecal Collforns Per I00 mI
Total Residual Chlorine
pH - berween 61.0 and 9'0
OiI and Grq,ase - less than l0
LIMITATI!Xq
3.3-Da..'-rsq. 7-Day Ave. Daily Max'
30
30
6,000
45
45
12,000
0.5
mg/l at all tiues and no vlsible sheen
Effectlte May 10, 1978, a regulatlon for implenenrlng the colorado River
Salinity SEandards has been adopted by the Colorado Water Quality ConErol Commis-
sion. Aoong lts ruany provisions, this regulaCion restrict'S Ehe increnental ir-
crease in sallniEy, between the intake waler supply and Ehe wasEewaEer discharge'
to 400 ng/I. Slnce t,his concenEration is cypical of a secondary treacoenc
effluent, and the increoental salt load reaching the Colorado River is less
Ehan one Eon per day, the regulaEion should not apply to Ehe slIE discharge'
If issuance of a new NPDES per'it Eo ghe to!'n requires thaE a salinity monitor-
ing program be establlshed, the guldelines of the waEer Quality conErol Cor-"ls-
slon will be followed'
I
I
to
I
I
4.CURRENT SITUATION
The boundary of the plaunlng area for thls study ls shown by a dashed llne
on Flgure l. The Board of TrusEees for the Eown of S11t', a rePresenEatlve of
the Colorado West Area Council of GovernmenEs, and Ehe consulElng englneer'
mutually agreed upon these llolts for ao area Ehat could be feaslbly served by
a treatE0ent faclllty at Sllt. The region souEh,of the Colorado Rlver ls not
included ln Che plannlng area. It ls nostly ranch and farm land' and develop
ment ls not antlclpated t,here wlthin the 2o-year plannlng period'
Up to now, grolrth has occurred priuarity to the east of town, because land
owners wishlng to develop there annexed to Silt. Some develoPBenEs to the north
of SilE proper have been platted or proposed, whlch classifies this as an area
lnt.o which Ehe town will ultiuately expand. (The Upper ltlesa area has real
pot,enEial f or Iow denslty residentlal developnenE. ) ltost of Ehe area is curreot'-
Iy belng cultivated, however, and could reuain undeveloped, especially if lt ls
prime agricultural land. l{est of town, high density develoPBent is expected as
Sllt and Rifle expand to l[eet each oEher. Sil.E ls preparing to absorb sone of
!. a.u.endous energy-related groerth now belng experienced by Rlfle' Such a
shared boundary with New castle Eo Ehe east is hindered by naEural physical bar
riers. Itlgh density cornfnercial and Iight indusErlal developuent will probably
occur both east and west of town along Highway 5 and 24.
The SaniEaEion DisErlcE formed in t95l was disbanded in 1973, afEer Ehe
local bond issue which had helped finance const,ruction of the existing waste-
water treaEEenE facilltles was paid off. The town of StIt ls now)rasPonsible
for planning, financing, and operat,ing public wasEe EreaEment work'6'
DE},IOGRAPHIC DATA
Table 2 suronarlzes Ehe historic population for the E.ownr'of silt' IE has
grown considerably fron a level oE 434 in 1970 to Ehe current (1979) estiuate
of 1,000. Thls increase can be Partially attrlbuEed to the up-swing of energy
developmeng act,ivltles in the area. During this saue period several parcels of
land have been annexed Eo Ehe Eoern. The new dwelllngs situaEed on the annexed
.Lracts are prinarily rooblle houes. Sone wood fraue houses have been construc-
Q"o and plans readied for additlonal unlts to be built as soon as Ehe moraEorlum
on waler taPs 1s lifted'
(
:
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-5-
ORGANIZATIONAL CONTEXT
:-\(
(
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srl
.l
iff^">47'*_tntlN t Hc AREA.'8oui$qtRY
s\(
rt _4"
i
FIGLJhE ., I *,
\-s..-
II ;I .STUDY
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"1
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TABLE 2
HISTORIC POPULATION OF SILT
YEAR NUUBER
1950
r950
l 970
197 4
197 5
r977
1978
Present
361
384
434
720
780
859
900
I ,000
Eroployment oPPortunltles wj.thln the town ltself are Ifunlted. MosE of Siltrs
residents work 1n surrounding communitles such as Rifle, Glenwood Springs,
Carbondale, Aspen, and at the C-a and C-b 01I Shale Tracts. They are employed
by nlnlng concerns, trucklng and constructlon companles, and servlce lndustries
(cafes, serviee stations, specialty shops). The availabillty of housing and a
uore moderate cosE-of-living provide poslElve aEEractions to the regiont s labor
force for establishing residenee in and around SlIt. Businesses presently
Iocated in SllE are involved in agrleultural processing operations, convenlence
retail goods, and commercial servlces.
In the Coraprehensive PIan being formulaEed by the town, land use patterns
and expecced trends in development are identifled. Hlstorieally, the town
has evolved in an east-west linear pat,tern parallel Eo the rlver, and in
response to the alignment of uajor Eransportat,ion facilitles llke the Denver
and Rio Grand.e Western Railroad, and U.S. Highway 6 ail,24. Mediun and high
density residential areas bord.er the comrnercial sec!ion located al)ong Maln
StreeE (Highway 6 and 24). If urllities can be exEended Eo serve /he unincor-
porated land flanking the residential areas, developuenE will oqcur there. The
proposed Land Use Plan for the Silt planning area is reproduced in Figure 2.
CLIMATE AND HYDROLOGY
Wide seasonal variations in Eenperature characterize SilEts clirnate. In
the summer, dally highs above 90" F. are.courmo:r, whlIe winter tetrperatures
perlodically fall below zero.
Accordlng to the 1968 General PIan for Garfield County, t.he average annual
preclpltatlon for the region in whlch Silt ls locared ls l0 - 15 lnches. The
-7-
actual value tray approach the lower end of thls range since II lnches Per year
ls average fog Ehe nearby clty of R1fle. Ralnfall events of hlgh lntensity are
posslble during the summer ruont,hs and generate heawy locallzed runoff.
Flve basins essentlally draln the plannlng area. Three of these flow dlrec-
tly into town froxo the north, and exlstlng dralnage problems will be aggravaEed
as developoent occurs there. Dralnagelray lmprovement,s proPosed for the Cown
wlll provlde outlet to the Colorado Rlver and relleve Ehe slEuaEion.
Flov, rates ln the Colorado Rlver vary accordlng to season. In t,he sprlog
and early sunuer, snowrnelE. runoff increases the rlverts dlscharge. Low flow,
as the 303(e) Water Quallty tla agemenc Plan reveals, often occurs during the
late sr.rmmer. The design low flow for the Colorado Rlver at New Castle is Il00- (r)cts.
Infornation on the flood p1aln of the Colorado River at this Iocatlon is
generally sketchy. Because of the deslrabllity of loc;ting wasteerat.er treatment
plants outside of flood plains, sone type of analysis ls necessary to evaluate
Ehe poEential probleu at Silt. The value for the 100-year dlscharge at SilE,
taken f rom a 1977 flood lnsurance stud,y done for Garfleld Co,rrray(4), ls
431000 cfs. For the IntersEate 70 bridge whlch crosses over Ehe river just
lresE of Silt, the Colorado DeparttrenE of Hlghways conducEed a study of the
backwater effect from the 50-year flood (40,000 cfs). The graph provided by
the highway department shows a vraEer surface elevation in the natural channel
of 5401.5 at Q = 43,000 cfs, and I foot rise in elevation due to che bridges.
The backwat,er effect should extend upstreao no further than 500 or 700 feec.
Additional analysis to that of the hlghway departnenE was provided by
pIoEEing two cross-secEions, and deternining the flood surface elgvations ac
Ehese points. Assunptions for thls analysis included Ehe following:
1) Ihnningrs roughness coefficienE in channel = .035
;
2) Manningr s roughness coefficienc for overbank flow = .06
3) DepEh of water beneath surface as photographed = ?,-0 feeE
Section A Seccion B
WaEer surface elevaEion
aEQ=43,000efs 5426 .3 54 I I .9
waters are seParated frou Ehe general ser-As shown in Figure 6, t.he f lood
vice area by Interstate Highway 70.
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€R---r-
il
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)
A leCter fron the Aruy Corps
aElon ls lnciuded In the Appendlx
Englneers concernlng the flood plaln evalu-
Exhlblt C-3.
SOILS. TOPOGRAPTIY. AND GEOLOGY
The necessary lnfornatlon 1s avallable fron the Geologlc Hazards Identlfl-
caElon Srudy (6)
"o.,aucted by the LlacolrrDeVore Testlng Laboratory for
Garfleld Couuty lu fulfllluent of the requlreoenrs of Colorado House Bill t041.
In che broad flat valley Eraversed by the Colorado River, bedrock and sur
flclal naterlals are streardeposlted sands, sllts, and clays. North of the
valley, pedlmenr and terrace gravels, and torrentlal wash fans overlle the
I'Iasatch bedrock foruation. Test borlngs were drllled 1n the northwesE corner
of the exlstlng torrn, and on the upper oesa, and a 15 - 20 foot deep silty,
sandy clay layer was encountered aE, Ehe surface.
Developuent poEentlal 1s resErlcted for approxfunateLy 37 of the plannlng
area because of excesslve land slopes. These areas arl suitable for parks and
recreaElonal uses. Adequate elevatlon dlfferentlals exist wlthln the bulk of
the study area' allowing gravity flow of wasEe\dater Eo the Ereatnenc facility.
However, a llft sEatlon and force roain wlII be required for a loe-lying reglon
near the river which cannoE be gravity-sewered.
on-Slte Wastewater SysEetrs
WasEewater processing chrough indlvidual systens 1s proposed for a oajor
Portion of the land within the plannlng area boundary, These areas appear to be
suitable for conventional on-sire disposal uethods. According to the Geologic
Hazards Identification SEudy done by Llncoln-DeVore Testing Laboratory in 1975,
common limiting condlElons (high waEer Eable, slow or fast, percolaElon rates,
soluble evaporite minerals) Precluding the use of sepElc systens are not evident
lrichin Ehe planning area. The Garfleld Counry HeaIth Depart..r,a r(." or less
agrees with this assessBent since water table problens have nocibeen encountered
during consEructlon of existing septlc systetrs, and Ehe percolation raEes gen-
erally range frorn 20 - 50 nlnuEes per inch.* Tight soils rt'ttr percolation rates
of 50 Einuces per lnch or greater have been found to exist, aE a few locatlons in
Section 4 of Torirnship 5 South, Range 92 West. These isolated areas should be
serviceable through other Eeans such as extendlng the cenEraltzed eollection net-
work to lnclude them.
*Telephone conversatlon, Edward L. Eeld, County Sanitarian, Garfield County
of
as
-lo-
' Garfleld County can reconilend agalnst lssulng pertrit6 for lndlvldual dis-
poeal systeni 1n deflned areas whlch are subdlvlded for oore than two dwelllng
unLts Per acre. However, serrer servlce may, ln the future, be provlded loto
those areas targeted for hlgher denslty developuent lu the Land Uee plan. Al-
though they do not aPPear to be necessary, alternaEive on-slte disposal nethods
such as evaPotransplratlon beds and sand fllters are avallable where coudltlons
rule out the use of conventlonal soll absorpt.lon sysEeus.
Other Envlronnental Conditlous
Bi oI og I cal
Varlous plant and aninal types whlch olght exist ln or around SlIt have
been lnventorled by the Bureau of Land ManagemeaE, and are detalled in two
speclfic studies: the Rifle 201 FacillEies tt.n(9), and an Environnental
Analysis conducted for the Riverbend Developroent near New Castle, Colorado(10).
Inforuatlon for the Rifle Faclllties P1an was obtalned'f.o, the Bureau of Land
Managemenc offlce in Glenwood Sprlngs. The rables in rhe Appendlx (ExnfUft t)
5'rrnmal{ze the different flora and fauna identlfied in the two studles. It
should be noted that lndigenous specles are lnventoried over a very broad region
and may noc actually be found wiEhin Ehe llnlted planning area around SilE.
A document PrePared by the Colorado Dlvlsion of Hitdllfe(ll) o,rtIi.r""
habitat essential Eo the exlstence of threatened and eudangered wlldllfe in the
sEate. For each species, hisEoric and presently occupled ranges are delloeated.
The 511t planning area falts wiEhin the hisrorie occupied range boundaries for
one endangered species of fish (Colorado River Cutthroat Trout), two endangered
species of birds (Whooptng Crane and Greater Sandhill Crane), and two endangered
types of ma--als (wolverine and River Octer). Four other specles lof threatened
or endangered flsh are ioporEant because their hlstoric occupled ringes 1le
downsEream from Silt along the Colorado River. These fish are: ,the Razorback
Sucker, Bonytail chub, Humpback chub, and colorado squawflsh.
In addltion, the U.S. Fish and lrlldllfe Servlce lists t(. U"ta eagle and
peregrine falcon as endangered species posslbly occurring in the project.1trpact
area. According Eo thaE agency, two plants which are found In Garfield County
ln the vlclnlty of Silt, are proposed for listing as threatened or endangered.
These are: the rockcress (Arabis oxylobala) and sclerocactus glaucus. The
resPonse letter frou the U.S. Flsh and tllldllfe Servlce rnay be found 1n rhe
Appendlx as Exhlblt C-2.
-I l-.
Ammonla Toxiclty
Un-lonlzed amonla 1s recognized as a
varleEy of fish specles. Thls ls a prlme
ing waEer quallty crlterla, or dlscusslng
chemical compound acutely toxlc to a
factor Eo be consldered ln esEabltsh-
speclfle contaninant loadlngs.
The acceptable maxlmum concentratlon for freshwaEer aquaElc llfe of un-
lonized ammonla presently appears ro be .OZ ag/ I as N\-N(z)'(12). Ar 1easr,
thls linit has been held valld 1n sEudles assessing che expected lrat,er quallty
condiElons for the Colorado Rlver Basln ln Colorado. In the 303(e) WaEer Quality
Managenent Plan, cotrputer raodellng of projected I993 Ioadings has been used to
reveal that 1n-stream concenEraElons should be lower than recoumended standards
during all seasons. Actually, allocations are well ln excess of projected 1993
' (2)concenErations'-'. Accordlng to Ehe 208 Areawide Water Quallty Management
Plan, no ammonia violatlons are antlclpaEed for deslgn condltions(i).
High concenErations of a--onla in rnany waters co,rld be due to ounlcipal
seerage effluents, or cerEatn indusErlal or agrlcultural discharges. Up to
one-half of the nitrogen ln wastewater effluent rlay be in the forrn of free
. (2)ammonia'-'. Assuning the per capita contrlbutlon of nitrogen is l0 lbs/year
and very little is removed in Ehe treatnent process, Ehe oaxirouru projecEed
loading of ammonia nit.rogen froo SiIt for the 2O-year design flow is around 35
lb/day. Nltrification in aerated Iagoons and incorporaEion of nit.rogen lnto
algae ceIIs will reduce the overall am-onia concentrations enEering che sEreatr.
Chlorine Toxicity
Chlorine, in nearly aII foros, is toxic to fish. The allowable concentra-
tlon of total residual chlorine for continuous use 1s unofficially glven as
.ooz ,g/t(2). Because accumulations of chlorine residual from role than one
community are noE anticipated within thls reach of the Colorado Ri(er, a direcE
diluEion ration can be calculaEed to indicate whether or not the criteria ls
being exceeded. Sllt's dlscharge linltation for total residual chlorine is 0.5
tog/1. with a oaximuu allowable in-stream concenrration of .002 ng/I, the ratio
of sEream flow to plant oucflorir musE be greater than 250:1. It is 3000:I for
rhe design discharge and a low flow in Ehe Colorado Ri.ver of II00 cfs.
l{i xlng
Although a number of empirical equatlons exist for doing so, predictlng the
theoretlcal dlstance from diseharge polnt to a well nlxed zone in the sEreatr is
problenatlc, and wlll not be atteopted.
It would apPear, however, Ehat nlxlng and dlsperslon of wastewacer effluent
frou SlIt 1s enhanced by the proposed locatlon of the outfall Eernlnus. The cur
bulence and non-unlforu veloclty dlstrlbutloa downstreau of the channel conflu-
eace Provlde a transPort mechanlsm for dlspersal of pollut.anEs within the CoIr
rado Rlver.
Envlro mentally Slgnlflcant Agrlcultural Lande
As deternlned by Ehe Soil ConservaElon Servlce, some land within Ehe plan-
nlng area ls considered Eo be prlne agricultural. Thls farm land has the proper
conblnation of physlcal and chenlcal characterlstlcs to produce high yields of
cerEaln tyPes of crops. IE must be available for such use and presenEly irrip
ated. 0f the esEimated 2100 acres of prlue land lnside the planning area bound-
arles' over one-third is located ln what uight be considered the general service
area. Protectlon of thls essentlal agrlcultural resoufce is addressed ln the
environmental analysis.
EXISTING WASTEWATER FLOI,JS AND TREATMENT SYSTEM
Approximately 1,000 persons occupying 370 units within the town are served
by the existing collection and treatroent systetr. Service capability appears Eo
be rescricted by the capacity of the creaEtrent operation.
The two-cell biological lagoon systeru was constructed 1n 1970, E,o replace
the existing Inhoff tank and accommodaEe construcEion of Interstace Highway 70
through the area. IE was designed by Barton, Stoddard, Milhollln and LupEon,
Inc. of Denver, Colorado, Eo hydraulically retain the wasEe discharge from a
communicy of 5J0 persons for a period of I03 days. Cell characEeristics in-
cluded a 4.5 foot liquid deprh and 5 acres of tocal surface...r.)
[.rastesraler' prior to entering the ponds, passes through a Parshall f lune
and a splltter box. Since there is a 12 inch plpe connectlng Ehe two lagoons,
and floq, can be diverted to either by the splltter box, the cells can be operated
ln series or in parallel. A weir with renovable flashboards serves as the
outleE for each pond. No means are provided for disinfecting the effluent.
A town employee is available to perform need.ed mainEenance on Ehe EreaE-
ment facillty. (A sample of its effluent Is collected and tested by che State
on a monthly basls.) As for adolnisEerlng costs, a regular monEhly sewer use
fee of $9.75 ls charged each buslness or resldential unlt tapped lnto the sys-
-r 3-
teu through soue 370 servlce connectlons. The charge for a new tap ls currently
$600.
The Ewo-ceII, non-aerated lagoon 6ystea was non-dlscharglng ln l!]5 wheu a
dlscharge pertrlt was lssued by the State. Slnce that tlne effluent has beeu
released lnto the Colorado Rlver.
Analysls of the facllltyrs outflow has revealed lts non-eompllance wlth
Pernit condltlons. In excess of allowable standards were the BOD, $S, and
fecal collforrn concent.ratlons. A prlvate lab tesE performed ln Noveuber of
I977 when the eells were operatlng In serles, ylelded the following concent,ra-
tions: D0 - 9.15 aglL; BOD - 19 ng/i; SS - 89 rag/t; fecal collforu -
oxto6/l0o mt.
The physical condltlon of the lagoons ls poor. There ls seepage through
the dikes and bottou, and caEtails are growing in the center of each pond, whlch
lndlcates a buildup of sollds there. Shallow deprhs rgsultlng frotr sludge
accunulation 1n the ponds could be partly responslble for lncreased suspended
solids Ievels, slnce better sunlight exposure protroEes algal grolrth.
Because suspended sollds and fecal collforrns ln the effluent have exceeded
accepEable liniEs, uPgradlng of the wasteqraEer Ereattrent systeE appears nanda-
tory. At the very leasE, a chlorination device should be lostalled, aod the
ponds should be dredged out, and lined wlth an luperneable traterial. Ilowever,
in vlew of the growEh which has been forecast for Silt over the next 20 years,
nore exEensive renovatlon and constructlon wl11 be necessary. Chapter 6 wl1l
- consider various alEernaEives for lncreasing the capacity of the system.
Wastegrater flows are not ruonitored on a continual basis. A recordlng de-
vlce was placed ln the Parshall flune, and flows lrere recorded fot a perlod
beginning February l8 and extending Ehrough March 6, 1978. !.lonltoying resulted
in the values for peak and average daily flow shown in Table 3..
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DATE AVEMGE DAILY
TASLE 3
DAILY WASTEI.'ATER FLOWS
PEAK FLOW RATE
SILT
FLOW
Feb. 19
Feb. 20
Feb.21
Feb. 22
I'lar.5
Average
Gallons/Da
69,000
80 ,000
61,200
65,500
63,600
68,000
GaI I ons/Da
138,200
160,700
I62 ,400
121 ,000
127 ,900
I42,000
GALLONS PER
PER DAY (9OO
CAPITA
Persons
77
89
68
73
7l
76
The average dally tastelrater dlscharge for Ehe Eown of Sllt was about
68,000 gallons/day, wlEh a peaking facr,or on Ehe order of.2.L. Assunlng a
population then of about 900, the per capiEa flow was 76 gal/d.ay. A Dinio,lm
rate of approxlmately 32,000 gal/day between roidnlght and 6 a.ro. is co"'non for
Ehe Eown.
There are no indust,rlal contribuEors to the Eownrs wasEe discharge, other
than the usual comnercial establishments. An analysis of a composite sanple of
lrastewaEer entering the lagoons yielded the waEer quallty characteristics shown
in Table 4. These values are about normal for a typical domest.ic wasEe.
TABLE 4
SILT WASTEWATER QUALITY PARAMETERS
PARAIffiTER CONCENTRATION
pH
Dissolved Oxygen (ng/l)
Settleable Solids (EI/I)
Suspended Sollds (ug/I)
COD (ug/r)
BoD (trs/I)
No2 (mg/l )
N03 (mg/l)
PO4 - Total (mg/l)
NH^J
Ttui (ne/I )
0il and Grease (ug/I)
Fecal Collforu (colonies/100 ml)
7 .24
1.00
6.0
)
193/. 604
i t9l
0.21
3.23
32 .0
l8 .4
.r1 ,)
-, .L
36
7 x l.o6
- l5-
COLLECTION SYSTE}T AND INFILTRATION/INFLOW ANALYSIS
The collectlou systeo 1s cooprlsed of a varleEy of plpes of clay, asbeatos,
or plastlc c,onstructlon, and ranglng ln size from 4 lnch to 8 lnch. A uajorlty
of the llnes were placed aE mlulnum grades. Installed In the l950rs, the orlgl-
nal sysEem has slnce been extended to Ehe east and north to serve new develoy
Eenrs. The general layout ls shown in Flgure 3.
Some problem areas exlst in the overall collection network: 1) A few
uanholes ln the systeu were construcEed out. of uet,al drr:ms and represent points
of excesslve lnfiltratlon. 2) The 8 lnch trunk liue passing beneath laEerstate
Hlghway 70 and connecElng the lagoons wiEh Ehe rest of the collection qetwork
has a grade of 0.3% whlch is less chan Ehe 0.42 oinlnum prescribed by the State
Healch Departnent. Low flows Iead to a buildup of sollds ln the Iine, but
periodlc flushing has so far alleviated the problero. Thls 8 inch naln places a
strlcE limitatlon on the aoount of flow increase Ehe slsten will tolerate.
Even if the line is regularly rnaintained, and deposited solids are prevented
f ron accunulating, 1t.s capaciEy is resEricted to .70 cfs, or Ehe r.raste discharge
of 2380 Persons based upon a daily volume of, 76 gallons per caplt.a and a peak-
O t"t facEor of. 2.5.
Drought conditions and a low wat,er table during 1977 prevented a t,horough
infiltraEion and inflow analysis frora being nade. Even a precipitatlou event
in March 1978 did not produce enough deviation from normal in the recorded flow
rates Eo allow drawing any conclusions. Figure 4 shows the discharge of the
systen on March 6, 1978, plotEed against the average dlurnal flow pattern exhl-
bited on the oEher days in Ehe study period. By the nlddle of May, water was
flowing in the irrigatlon ditches, and a wet spring had produced high ground
water tevels, so infilEration during this period should have been)g.""a""a.
However, flow recordlngs for t'lay 16 - 18, 1978 did noc yield a dlsdernible
variation in discharge raEes either. Additional investigatlons 'perforued ln the
spring of I979 yielded sinilar results, as shown below.
/Nighttine low flow inco the lagoons is assumed Eo result froo ground water
infiltration. If this discharge of.32,000 gpd is allowed ln Ehrough the 2.4
miles of 8 inch pipe,2.6 miles of 6 inch pipe, and 0.3 niles of 4 inch pipe
in the Eownrs collection sysEem, Ehe infiltration rate is 890 gpd/in./oi.,
!
wiricn is less than the value deeued excessive by EPA (1500 gpd/in./ni.).
-r 6-
t-- t 'f=iiL a- t,; Fl/
\--- iq _'il
+z/EluLFa
LJ
=
\/-f.- .. -"
zI
F
F
an
F
E
lL trl
i/ olzl<.E
o
o1
\
-r-' '--\./\
)
(\\
oo
9
ll \r
l!
(J(n
E.tr/
z
FIGURE 3
SILT
wAs r E w o Ir.srE?,*E c r I oN
. -----\:\.. -\\\\\'.t.
\ \=-.-----\ -\)\\t'\
I
:
? --/ ' --_--v-.
It)
FIGURE
.i
D IURNAL FLOW
D ISCHARGE ON |{ARCH 5, I978
PATTERN
\\
\
(
/
ko
J
(9
oooo (,
E FLOU
Tl.rEEN
AV
BE
t2
LroiltGHT
t2
t{ooil
PATTERN
FEB. 19 AND HAR. 5
SILT . WASTEWATER TNEATI€IIIT _SITE
I
(
Therefore, further lnvestlgatlon
parts of the collection network
lnto the cost-effecElveness of rehablllfaclng
1e unnecessary.
In a study perforned by
lnfiltraflon uas Eeasured as
on a 1975 populatiou of 780.
sewer llnes ls excesslve.
McDoweI l-Srqith Assoclates
250 gpcd, whlch trauslaEes
in 1975,(7) no'r"r..,
lf Ehis estltrate ls valld,
lnto 195,000 gpd based
inflltraElon iuto the
Because of the wide varlatloa ln the approxinations, further analysis of
the systerurs infiltratlon charact.erlst,ics was carrled out. IE has served to
solldlfy the positlon that lnflltratlon and lnfIow lnro Sllt's sewage collection
system ls noE excesslve. Flow neter readlngs fron AprlL 25 - 29,1979 yielded
average daily dlscharge rates of 68,OOO - 70,OOO gallons/day, and ninloum low
flows between 25,000 and 30,000 gallons/day. An unusually wet winter and spring
should have resulted in increased runoff and high groundwater tables, buE no
dlscernable difference in infittratlon raE.es was apparenE. V1sual observatlon
of scactered uanholes within the collection sysEen b"tl""r, the hours of I:00 and
3:00 a.n. on t'lay 6, 1979 allowed additional conclusions Eo be drawn. In the 8
inch pipe passing beneath Inrerstare Highway 70, L-l/Z inches of flow would ln-
dicaEe an overall infiltratlon rate of 30,000 - 35rO0O gallons/day. Flow into
che systen durlug these hours appeared to have originated at a n,rmber of differ-
ent points, rather than in one particular line. The most obvious sources of e:r
Eraneous water Lrere crossings of the Cactus Valley irrigation ditch, since flor.r
was usually observed in manholes dornsEream of the ditch, but not in those up-
strean. AIEhough a ntnber of the manholes examined were iuproperly construct.ed
or in poor physical condition, none seened ro be infiltratlng appreciably.
KRUGER SUBDIVISION
Practical waste\raler tranagetrent options are Iimited for the irur", Subdivi-
sion, a small tract located just west and outslde of the present S(It town boun-
daries (see Figure 7). A septic tank and soil absorprion fieldcwas originally
intended Eo serve the subdivision, although undesirable soils with percolaElon
rates greater than 60 uinutes per inch have been encounter"/tn the area. Eight
uniEs in Kruger are Presently hooked into one pipe, and minioally treated waste-
water is belng discharged to State wacers. According to both the State Board of
Health and the Carfield County Health DeparEmenE, this waEer pollution problen
represenEs a serlous health hazard and must be reruedied.
All the 4Iternatlves for ser{age treattrent wlthln the plannlng area should
be addressed during che faclllty plannlng eEage. ConsequeDtly, ultlgatlve Eea-
sures for the water polIutlon problea caused by Kruger Subdlvlslon wlll be elr
plored ln Sectlon 6.
o
5.FUTURE SITUATION
O pEMocMPHrc PRoJEgrroN
I.Ilth SlIt's proxlnity to the energy lupact,ed reglons of Western Colorado,
1t could experlence substanclal populatlon growth over the next 20 years. Io
order to eujoy a quiet llfe style aod avold the hlgh cost of houslng ln other
Western Slope communltles, eoergy conpauy employees rnay flnd SlIc a desirable
place Eo reside. An expauslon of exlstlng faclllEles will become oandatory tf
thls lnflux of people marerlallzes.
The factors whlch comblne t.o cause an areat s populatlon to expand are often
beyond local control and extremely dlfficult to forecast. Depending upon what
posture the federal government takes regardlng energy developuent, antlclpated
grorrth resultlng frou the extraction of the Colorado River Basinrs petroleun,
uranlr-m, oil shale, and coal reserves could swell ifs populatlon to Dore Ehan
3l5rOO0 over the next 15 r"..".(2) The growth rate ofi.Silt could conceivably
natch that of the region. The 303(e) Colorado R1ver Basln PIan has t,ried to ac-
counE for the uajor variable whlch will affecE Ehe Eownr s future size by fore-
casting populatlons 15 years hence, both with and wiEhout energy development
qaklng place. The 1993 values are 1,750 and 1,000, respectively. Projecrlons
oade by ot,her agencies, namely che State and the Colorado West Area Council of
GovernrnenEs, are shown 1n Table 5.
DATE
TABLE 5
POPULATTON FORECAST FoR SrLT, CoLORADO
STATE OF COLORADO C'IIACOG
L917
1979
r980
1981
r 982
r983
I984
r 985
r 990
199 5
2000
859
930
974
l0 l8
106l
I I05
I I48
I 192
i4 t0
1628
1846
859
tr297
15 I0
r603
t5 r6
1802
I 940
2082
23I I
2609
2827
a
-2L-
The estluace PrePared by the colorado west Area councll of Governnents iB
somewhat' hlgher thau the level forecast In the colorado Rlver Basln plan nlth
energy developroeot occurrlnS. However, Ehe consultlng englneer belleves that a
hlgher growth rate 18 aot unreasonable 1f predlcted energy resources developtreot
occurs 1n che surroundlng area and servlce facilitles are upgraded properly. A
curve showrng future populaElons based upon a growth rate of about 72 inltlally
ar.d 2-l/22 later on, ls plotted ln Flgure 5. Also deplcted Ehere 1s a grouth
rate curve whlch mlght be considered Ehe mazgin,rm probable for the plannlng area.
conslderlng the grolrth rat,e for reallstic planning,3,oo0 people could reslde inSllt by the year 2000 whlch ls 20 years from the dare when the planned facility
will begin operatlon.
FORECAST OF FLOWS AND WASTE LOA.DS
WIth such wide variaElons ln the differenr populatlou
casting of future wasteir,ater f lows ls diff icult. Howe$er,
colorado west Area council of GovernnenEs wilr be used. rf
1s realized,, and deslgn flow for the Ereatment faclllCy is
projections, fore-
the projectiou of the
a hlgher growch rate
reached sooner than
O expected, Sllt uay re-evaluate iEs needs at rhat rime.
Sone of the land betseen the Colorado River
been earuarked for light industrlal develop,rnent.
provided Eo Ereat Ehe wastewater discharge frou
industries.
Design Estioates:
Year 2000
2827. persons ar 7G
plus l0Z allowance
BOD loading at 200
Year 1990
2311 persons ar 76
plus l0Z allowance
BOD loading aE 200
and U. S. Hlghway 6 & 24 has
Additional capaciry should be
Ehese future non-ident.lfiable
Bal/person/ day
for industrial growth
Total
ng/ I
Bal /person/ day
for industrial growth
215,000
!21.000/236,000
;394
176,000
r7.000
193,000
322
gal/day
gaLl day
I b/day
gal / day
gal I d,ay
I b/dayomg/ t
Tocal
trJ (9
*=
Ed
=3
=33E
o,-z-r! Errr S.lJsfi Ha
9z:OILA_ \_,J--3 Eq=5oo-t-o'
o-
t,r
9
ooo
(\'
ooo
.t
ooo
\o
ooo
ao
ooo
o
ooo
G'
N9rrv]n&d
I
r
olr
I
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a
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I
ALTERNATIYES
As noted prevlously, the exlstlng treatoent faclllty lsThere ls no feaslble way to lncrease 1ts capaclty and allowflows, wlthout extenslve constructlon taklng place.
The effects of a "no actlon" plan on surface water qual.ity nlght not bedrasElc' but vlolatlon of the dlscharge perult standards would contlnue unabated.rf the plant effluent were dlsposed of utlllzing land applicatlon technlques,thls problea could be avolded- However, lnstltutlon of a land disposal pro-gram really represents a waste treaEtrent alternaEive, and lt wlrl be furtheraddressed under that headlag. Reductlon of flows and waste loads is not avlable treans for correcEing Ehe situation. The expanding population negatesche benefits of any flow conservaElon ueasures, and t.hg daily per capita dls-charge of. 76 gallons is already on che low side.
The alternatives evaluated ln thls study caII for uajor expansion of thepresenE systeE.
REGIONAI SOLUTIONS
ropography and the paucity of people in thls corridor of the coloradoRlver Basln are deflnite drawbacks to any reglonallzed operation. one alternateconsidered ln the 303(e) Basin Plan tnvolved treating arr wastewaEers generatedbetween silt and Rifre at the Rifle plant. This proposed scheme, which.Jn_cluded an 8-l /2 nil e pipeiine between the two citles, was judged to be c&t_lneffectlve' .New casEIe 1s situated 7.7 miles upsEream frou silt, and Mountaln
ln"l::".-Subdiv.ision is 5.1 niles upsrreatr. Englargenenr of rhe \.,asre rrearaenrraclrltles serving these coomunit,ies appears to be nore feasible tlan anyregional sol ut,ion.
ALTERNATIVE WASTE TREAT}TENT SYSTEMS
A drafc of che 208 Areawide water Quality Managemenc plin ciassifies rhecolorado River below Grand JuncEton as a "water quality rirnited" sErea, seguenE.Above this point' only seeondary treaEtrenc is required of nunlcipal facitiEleswhlch discharge to the colorado River. Therefore, EreaEment processes Eo ac-complish nitrification and dechl0rlnatlon will not be required.
Lagoon systens, however, maY have to tnclude unit operatlons for suspended
6.
already overloaded.
it to handle future
-24-
I
tt
t
I
I
I
I
I
O
sollds re,oval, 61nce excesslve concentratlons occur durlng the suumer trontha
when algal productlvlty le hlgh- An amenduent to the srate regulatlons relaxlngthe standard for suepended sollds levels wlll obvlate the need for add-on reduc-tlon measures' ass'-1n8 the relaxed condtlon applies Eo slltrs effluent. rn-cluded 1n the Appendlx as Exhiblt B is a letEer fron rhe coern requestlng a varl_ance Eo 1ts dlscharge pentr1t under the revlsed suspended sollds IlulEatlons.
The 400 ng/l llmltatlon on dlssolved sollds lncrease is appllcable ro thesllt fac11lty, lf lts diseharge can be shown Eo have an impact on the lower naln-
stem of the colorado Rlver. t'Ihether a munlclpal discharge ls, 1n fact, a najorcoatrlbutor of thls pollutant 1s debatable. rn any case, adherence to thislinlt does not aPPear practicable, and allosance of an increase greater than
400 ng/l 1s anriclpated.
To rneeE progratr requirenents, at Ieast three alternatlves x0ust be consld-ered: l) treatmenE and dlscharge of effluent; 2) treaqpent and reuse; and 3)land appllcatlon' The second of the these does not appear to be appllcable tothls study' Treattrenc and reuse is obvlously less economical than treactrentalone, unless recycllng of Ehe effluent generates enough revenue to offset checosts for reuse- rn sllt's case, agriculturar concerns are Ehe only userslarge enough to absorb the wastewater volumes generated by the toern. But lrri-gating with wasreltater also purifies it, and prior secondary treattrent is an
added exPense' Therefore, only land applicatlon is feasible for practicing
reuse.
I
II
E
I
I
E
I
I
?
I
I
I
I
I
t
t
I
ALTERNATIVE I - MECHANIqAL TREATMENT
A uew '24 ugd plant would be constructed adJaeent to Ehe exlstlog lagoons.It would feature a couventlonal actlvated sludge proceas hrlth grlt renoval,flow equallzatlon, clarlflcatlon prlor to and followlag aeratloa, drslofectlon,aud dlscharge to the colorado Rrver. sludge frorq the clarlflers would be dr-gested anaerobleally and elther hauled Eo the Rlfle landflll, or utlllzed 1oa land spreadrng operatlou. sludge dlsposal represenEs a major cost lceu forthls treatnent alternatlve. Dlrect land dlsposal could be the trethod of cholcebecause expeuslve aad sophlstlcated dewaterlng trethods are avolded. Land spread-1ng of the dlgested sludge ls lncluded in the evaluaElon of annual operatlog
cos ts.
CaplEal costs for the project:
Grlt chamber aud flow record.er for f lume i.
Equallzatlon tauk and Ilft punps
Sedlueatatlou baslns (prluary and secondary)
AeraElou baslos
Chlorlne feed systeu
Sludge dlgesrer
Slte work and land
Subto tal
Plus 252 for contlngencles, legal, fiscal and
englneerlng fees
Total
Annual Operation and Maintenance = g32r000
Source:I"lastewater Treat
Technology Transfer, October Lg77.
$ 15,000
55,000
99,000
100,000
30,000
t75,000
30 ,000
$ 493,000
- 123,000r:,-
$ 616,000
)
Counupitzles, EPA
i
F-r,
=JE.trtrl
tI
It
FI
it
I
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e
I
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a
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0tlrrlslrto
lt
E
=tr?_s
oa
EEt-
lor-!l .r.crts
gE
o,6
.ECDoEA,a
U'6
5:
EE.O
La
aaEtdAE
=G,tdFJ
aeeto.
:
aa!otc-:r,
Gql
co
^.0vx
EotClrl
ao!
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_OOi,lst
:rll
EE
C)
-aFCI
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e6
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=o
ajOrlt3:j ttt
- 27-
g
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C
AI.TERNATIVE 2 . UPGRADE EXISTING LA@ONS
Oue pond la the exlstlng two-Iagoou systeE would be deepened and have
partltloos lnstalled across 1t. Ihree dlstlnct treacneBt celle are secEloned
oft, ttro for aeratlou of the eaaterrater and oue for flnal effluent poLlshlng.
Aseumlag eroslou PrevenEltrg devlces are not requlred for the Eurface aerators,
a llquld depth of seven feet ls reco"'.ended. Plplug Is provlded to allor by-
passlng any one cell, and a leakproof llner prevents seepage through the sldes
and botton of the baslu. Depth to groundwater and gradatlon of the underlylng
solls are factors to be consldered ln the flnal selectlon of a posltlve poud
seallng nethod.
The second exlsting pond could be renovated aod used for etrergeucy overflow
or sEorage. It wtll at leasE provlde soBe reteutloE' of wastewaEer whlle con-
strucElon proceeds on the other pond. i.
The major problern wlth thls alternatlve nlght be the difflculty of excava-
tlog soll whlch, after years of seepage, Is presumably ln a uucky condltlon.
!e
tri8tr costs reflect thls sltuatlon. After vtsual lnspecrlon of the exlstlng
Iagoons, a quallfled solls englneer belleves t,haE a reasonable estlnate for
excavaElon cosEs 1s $3.50/cu.yd. Funds should be allocated for disposal of the
dredged uaEerlal as weII. A three fooE depth of sludge, or about half che
volume of excavatlon, nay requlre transportatlon to a landflll I0 niles away.
Thls w111 have a substanEial inpact on the prlee of lagoon reuovatlon. If the
renaining half of the excavated volume can be deposlted somewhere withln a nfle
radlus of the plant slte, the cotal cost for dlsposal should be under $701000.
Capital costs for the project:I
. $' 70,000
i
56,000
60,000
36,ooo
60,000
30 ,000
5,ooo
25,000
Excavatloa - 20,000 cu.yd. ar 93.50/cu.yd.
Disposal - 10,000 cu.yd. ar g6/cu.yd.
+ 10,000 cu.yd. at 9.50/cu.yd.
Concrete Partltlons
Llner
Aeratlon EquipmenE
Chlorlne Feed SYstero
FIow Recorder
Plping
_1 Q_
Eroaiou, Protectlon
Subtotal
Plue 252 for coutlngencles, legal, flscal and
eaglueerlug fees
Total
Annual Operatloo and Maluteoance - $19r000/year
33.000
$ 385,000
96,000
$ 481,000
f^-_-r*;jr:l
.-/
t\.
2 t.4
Aerotors
gxisting Pona
Deepened ond
Aerotors lnstolled
Fortitigns
.s[J,:,ft;
t',I
:i
l' ,'-1
l:n
l,'.";
li
'
l,
t, ,,
li ,, ,"
l,l
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\)4.,
54t6 /o
(
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11 ,/
l,/
o"-..--\-
.-1.tr --- _-
---
.\ .-.\
\-
,i l
9r
I r,i''^rl4t+
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----
24t
I c.:
,15
tl
ii
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, 2.5
| 2l
ra-
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t
to
I
Alternatlve 2(b)
The same arraugenent as ln AlEeruaElve 2 1s featured, but flnal construc-
tlon Is delayed uot1l after a l0-year staglng perlod. To provlde adequare hy-
draullc reEentloa for a dlscharge of .19 ngd, the aerated ce1ls would be exca-
vated to wlthln 2 feet of ultlnate depth. Eroslou preventlng devlces are re-
qulred for the resultlng 5 foot operaElBg depth. Permanent lastallatlon of'par
I
I
5
be
I
titlous and plplng woutd uade during the flrst phase of construct.lon.
Coastructlon costs anElcipated at the end of the l0-year scaglng perlod do
not allow for lnflatlon of wages and prlces durlug that tloe, even though a
cosE effectlveness analysls would seen to be qulte dependent upou such factors.
The estlnated costs for scaged couscrucElon of a treatuent faclllty should be
exarnlned ln llght of these conslderat.ions.
,.
Phase I capltal costs for the project:
I
I
:o
I
I
I
I
I
Excavatlon - 141000 cu.yd.
Dlsposal - 10,000 cu.yd. ar
4,000 cu.yd. ar
Concrete PartlElons
Llner
Aeratlon Equipuent
Chloriue Feed SysEeo
FIow Recorder
Plplng
Erosion.ProEeetlon
Sub to ca I
Plus 252 for contlngencles,
aud englneering fees
Phase II capltal costs for the
Excavatlon - 5,000 cu.yd.
Disposal - 6,000 cu.yd. aE
Lluer
at $3.50/cu.yd.
$6/cu.yd. +
$.50/cu.yd.
legal, f iscal,
project:
aE S3.50/cu.yd.
S.60/cu.yd.
52,000
60 ,000
34,000
49,000
30 ,000
5 ,000
25,000
r 33,o0o
$ 347,000
i g7,ooo
$ 434,000
49,000
$ 2l,000
4 ,000
22 ,000
1 3 ,000
l0 ,000
$ 70,000
Tota I
Aeratlon Equipnent
Plplng, coustrucElon nodlflcatlous
Subtotal
to
lo Plus 252 for coatlngencles, legal, flscal,
and eoglneerlng fees
roEal #I
t
I
I
I
I
I
to
I
I
-47-
ALTERNATIVE 3 - NEW AEMTED LAGOONS
A new three-cell systen would be coostructed wesE of the exlstlag lagoons,
where the concelvable prlce for land could be 9201000 per acre. Ptplng between
basins, allowlng flexiblllty 1n operatlon, and a leakproof 11ner are necessary
elements of the proposed faclllty. Materlal geuerated ln excavatlng the ponds
should be sultable for use ln the enbankment construction. However, sone anount
of selectlve processlng uay be requlred to ensure the hotrogeneity and proper
quallty of dike mat,erlals. As shown below, earthwork cost,s for both excavatlon
and eubankoent constructlon are estlnat,ed aE 52/ cu.yd. For Ehe 11,000 cu.yd.
by whlch the volr:me of excavation exceeds embanloenE, a dlsposal charge of
9.60/cu.yd. has beeo assessed.
The existlng lagoons could be retained for energency overfloe, or sEorage
purPoses. i.
Even though cost-effecclve, thls alternatlve ruay prove Eo be iofeasible if
Sllt is forced lato condemnatlon proceedlngs in order to aequire t,he laud. The
Eown ls strongly opposed to condemnatlon, slnce 1t cannot afford the expense
and it must nai.ntaln a favorable relatlonship with Ehe owner, who also owus Ehe
island on whlch ics wat,er collection and treatoent, systetr ls located. To account
for the lncreased legal fees and cost.ly delays associated with acqulsitlon of
the land, the additional cosE for contingencies and Iegal, flscal and engineering
fees ls asstmed to be 302 instead of 25"1 f.or thls alternative.
Capital cosEs for the project:
ExcavaElort - 221000 cu.yd. at g2/cu.yd
EnbankmenE and Dlsposal - II,000 cu.yd. at g2/cu.yd.
I1,000 cu.yd. at 9.60/cu.yd.
Land - 4'll2 Acres aE g20,000/acre
Liner
Aeratlon Equipnent
Chlorine Feed System
FIow Recorder
Piping
Erosion Protectlon
Sice Work
Subtotal
$ 44,000
)
. / z9,ooo
i 90,000
36,000
50,000
30,000
5,000
25 ,ooo
34,oo0
L0,000
$ 363,000
-33-
Plus 302 for contlngencles, legal, flscal
and eoglneerlng fees
Annual Operatlon and Maintenance * $19,000.
Total
i09.000
s 472,000
I
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-: j'
tl,
Ois,lfectioa
ALTERNATE 3
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ALTERNATIVE 4 . LAND APPLICATION
Impleuentatlon of a land treatnent prograu for processlng slltrs waatewater
ls hlndered by the locatlon of the ceutrallzed collecElon polnt. Ttre exletlng
Iagoons (and che proposed slte of a detentlou basln for between-aeasou storage
of effluent) are located ln a narros strlp of land between Interstage 70 and
the colorado Rlver. For the effluent Eo be trao.sported to a sultable disposal
slte, some foru of punplng ls requlred, even dorusEreau along the Colorado
Rlver' Itrls 1s an uudeslrable slEuatlon froo a cosE, as nell as energy consrurp-
Elou, standpolnt. The constantly iocreasing prlce for electrlcal power wlll
stlnulate hlgher aud hlgher annual operaclng costs. AIso, nonreuewable eoergy
resources wlll be used up rather t,han conserved, ia pumplng of the effluent.
Although a ntmber of irrigatlon dltches Eraverse the plannlng area, agrl-
cultural reuse through exchange wlth fartrers and r"oeh"'i" does not appear to be
a rellable optlon. Canvasslng by the Towo AdulE,lsErator revealed that uelEher
the lrrlgatlon dltch cotrPany' aor faruers aod ranchers in the area, r.rere luter-
]a"a ln acceptlng wastewater eff luent for lrrlgarlon/fertlllzatlon use. Ihe
possiblllty that donesElc LraEer 1s belng withdrawn froo rhe CacEus valtey Dttch
further reduces the feaslblllty of dlscharglag wasEerraEer into 1t. publlc
contact wtth the treated erasEelraEer tray noE be ruled out when discharge is made
Eo an lrrlgatlon dltch- Therefore, a olnim,,- level of secondary pretreattrenE
is necessary.
for pracclclug land appllcatlon of Sllt's'r
75 acre slte, whlch lles ou Ehe south
the I-70 crosstng, could be) expanded to
property owners are agreeayle.
Assuolng effluent is plped vla 1lft statlon and, force roaln icross the
river at the I-70 crosslng, and does not enter waEers of Ehe state untll. reach-
ing the dlsposal area' only prevlous prlnary Ereatrnen; wlth itstnfectlon oay be
requlred' A uinluum of prlmary treacoent 1s recommended Eo reduce Ehe potenElal
for nuisance condltlons developlng durlng storage and distrlbution of the wasce-
water. Chlorlnatlon uininlzes the publlc health rlsks associated wlth Iand
O=---=:-:---
Capaclty to store 4-Ll2 xronEhsr dlscharge must be provlded. Slnce only
The locaElon of the proposed slte
wasEewater ls shorsu ln Flgure 5. This
side of the Colorado River and west of
135 acres in the future lf two adjacent
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FIG URE 6
SILT WASTEWATER
F^ CILITIFS PI ^ N
frozen ground condltlons prevent appllcatlon of the effluent to perennlal crops,
sooe type of pasture or forage crop ls recomended for cultlvatlon. This type
1s alao nore toleranc of varylng conditlons and requlres less roalntenance and
sklll t.o grolr. The appllcatlon rate 1s resErlcted to I.7 ln/wk by hydraullc
loading Iinitatlons.
The property oerners have lndlcated thar they expect the punplng and dellrr
ery costs to be borne by the Eown. Depending on Ehe conEract whlch ls negoti-
ated, Ehe town could antlcipate addltional operatlon and maintenance costs of
$2,000 per year for dlstrlburion of rhe effluenr.
Water Rlghts
Where wat,er has historlcally been puE to domesEic use, then treated and
released, a seqrage treatEenE alternatlve Iike Iand appllcation results 1n an
increase in consumpt.ive use, and a corresponding cost for additional erater
rights acquisition to see Ehac downsEreatr rights are nq.E lnjured. AlEhough
soue atrount of flow is returned Eo t,he river after lrrigation, l00Z consunptive
use ls assuned for the worst case conditlon. If wastewaEer return flow froo
Sllt is reduced frou 857" of. average daily usage to zero, an addltlonal 225 acre
feet is consumed annually by the year 2000.
SilE's erater rights are dat,ed 1940, and the Eown needs Eo take advanEage of
any opportunity Eo purchase replacmenE water for iEs own nunicipal use. Thls
sraEer will cover needs such as those arising when a call is placed on t.he Colo-
rado River (like the one by Cameo in 1977 which left rhe Eown in a precarious
posltlon with regard co municipal waEer supply). The transfer of water is
cornplicated since the sfaE.e engineer has difficulty in geEEing the Bureau of
Reclaoration io acEualIy release water Eo the river. Although the,siEuation is
clouded, no apparent replenishment of water to che streao was uaderduring the
drought of. 1977 by the Bureau of Reclamation froo paper storage which had been
purchased by che Eown of Silt. i
Because of the uncerEaintles surroundlng the Bureau of |.eclaoraEion's rnan-
ageEenE decisions regardi.ng replacement. water, and because land treaEmenE pro-
cesses will be curtailed if downstream wacer rights are injured*, a conservative
post.ure should be taken in addressing the long-ranBe waEer rights situat.ion.
*Divislon of WaEer Resources LeEEer Eo Ehe Scate Clearinghouse
The munlclpal.lty tray now own sufflclent waEer rlghts whlch could be converted
to cover the lncreased consumptlon. However, thls study nlll assume t.hat slx
nonthsr water sEorage nust be purchased every other year aE the current prlce
of $15.00 per acre-foot. Thls g850 1s included 1n the annual operatlog costs
for the Iand appllcat,lon alternatlve.
Capltal cosEs for the projecr:
FIow recorder
Grlt rernoval and prloary settllng
Additlonal storage capacity in lagoons
Chlorinatlon
Punplng and transolssion
Distrlbution syst,en and field preparation
Llner
Sub to tal
PIus 252 for contingencies, legaI, fiscal
and englneering fees
Annual Operation and Maintenance = g23,000
Total
$ 5,000
35 ,000
300 ,000
30 ,000
95,000
45,000
40.000
$ 550,000
138,000
$ 688,000
Source: Costs of Wastewater TreacmenE by Land Applicacion, EPA Technical Re-
port 430/9-75-003, June 1975.
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Pump to Disposol Site ,.---
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LAND TREATMENT THROUGH RAPID INFILTMTION
A ntober of factors combine to detract from the feasiblllty of sllt practl-
clng land treaEment through rapld lnflltraclon. Effluent must be pu.uped to thedlsposal site unless lt ls located on the land west of the exlstlng lagoons, and
upstreatr of the r-70 brldge- P,nplng ls undeslrable for the reasons stated pre-vlously. The noderate pertreablllty rates (0.6 _ 2.0 in./trr.) characterlstlc ofthe soils found west of the presenE pouds are lower than those generally recor
mended for rapid lnfiltration baslns. rn addltlon, a perlodlcally high ground
waEer condltion ac the siEe presents a uajor d,rawback to the rapid inflltraElon
process' An unsaEurat'ed zone 1s required to provide adequate lnflltration rates,
and naintain aerobic conditions during the dry-up perlod. The wetlands andfloodplain assoclated with the colorado Rlver do nor foster thls type of situa-
t ion. i
KRUGER SUBDIVISION
To conply wlth the EPA's request that the Kruger subdivlsion rrastewater
O disposal problen be addressed ln thls facllity pIan, alternative uanagetrent rech-niques were evaluaEed. The results of that evaruation follow.
A Iogical corrective Eeasure would be the construcEion of an interceptorline between sllt's existing sewage sysEetr and the subdlvision,s central collec-tion facil'ity' The 8 inch llne depicted In Figure 7 runs easE along Hone Avenue
co lst Street, and tles into the existlng systen a half block south of there.
The actual physical connectlon of the line would be nade at the nanhole betweenlsE and 2nd StreFE' since a 4 lnch pipe exiEs Ehe uanhole on the east side oflst Streec' rf the intereepcor ls installed, the two poor quallt) nanholes lnIst StreeE should be replaced. /
rn order to assess costs for the various wastewaEe, cr""tr8nc alcernatives,
an ultiroate population of 60 Persons eras estluated for Kruger Subdivision. The60 people are assuured to lnhablt 17 dwelllng unics, and rhe 1.p t""" and userservice charges are figured accord.ingiy.
I) Cost for Interceptor Extenslon:
8" Sewer pipe - 1200 L.F.
Sanltary Sewer }lanhoIes _
ar $13
6 at 9900
$ 15,600
5 ,4Oo
-6t-
Tap Fees - 17 D.U. at $900 ea.I 5 .300
$ 36,300
g 3,000/year
Total
Annual Servlce Charges - t7 D.U. at gl75 ea.
Ihe total present worth of costs based on a 20 year deslgn perlod and dls-
count rate of 6-7187, = $68,400.
Nelther the sEandard soll absorptlon syst,eu nor an evapotranspiratlon bed
appear to be feaslble sewage dlsposal mechanlsus, due to the Elght soll condi-
tlons and the llnlted areal extent of avallable land ln the subdlvislon. Likr
wise, storage ln a holdlng tank wlth Eransport to a rrasEe disposal site is not
a practlcal solution. The current charge for haullng Iiquid septage is around
$70 for a I1000 gallon tank, and should lncrease wlth expected higher gasollne
prlces.
Another opt.ion E,o be considered ls lnteroitcent sand filtration of septic
cank effluenE, followed by dlsinfecElon and, surface dlJ'charge. Such systeus have
been found t,o function satlsfactorlly, although nunerous regulatlon and Balnten-
ance probleus reualn. The process involves alEernaEing applicarion of effluent
beEween two sand beds, with a 3-uonth restlng perlod following three nonths of
operatlon for each. For the purpose of deEerninlng a required filter surface
area, a loadlng rate of 5 gaLlday/sq.ft. is appropriate. Below ground basins
wlth removable insulated covers are recornnended to allevlate freezing problens.
2) Costs for Septic Tank and Sand
Septlc Tank
Fl lter Beds:
l
i:"
$ 3,000
49,000
I,000
) I,000
$/53,000
;
Dual Sand Filter Beds
Dlslnfection
Dosing Tank and Plping
TotaI
Annual 0peration and l.lalnEenance - 92800/year.
Present l.Iorth of Costs = 983,000 /'
An individual system, such as the sand filtratlon of septlc Eank effluent
described hereln, requires a separate dlscharge peruit and must be continually
nonitored by public health officials and agencles. To lnsure the proper opera-
cion of a facility, naintenance must be performed on iE at regular intervals.
Ioproper malnEenance practlces very often result 1n falled on-slEe dlsposal sys-
tems. Obvlously, qrastewater treaErlent {n centrallzed ounlcipal facllitles is
deslrable froo the standpolnt of regulaElon and control. Extenslon of the lnter
t
I
I
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ro
ceptor Eelrer to Kruger Subdlvlslon ls reco'r,.ended as rhe rnost practlcal , as well
aa cost-effectlve .alternatlve.
T.TASTEWATER COLLECTION SYSTEM
In order for the deeign dlsctnrge to be adequately transported to the treat-
uent slte, expanslon of Ehe present serrer systen ls Eandatory. Slnce the slte
locatloo for aII four propoeed treatuenE alteruatlvee is t,he sane, the plao de-
vlsed for upgradlng the collectlon netrlork will uot vary wlth each alternatlve.
The arrangetrenE and slzes of sewer Ilnes ext.end,ed lnto future servlce areas
should be based upon future land use deslgnations aud expected populatlon detr-
sltles. Projected developent densltles ln terus of dwelling units per acre
are shown on the'Sllt Conprehenslve Plan !lap". Assr:mlng 3.5 persons will
lnhabit each dselllng unit, aud a peak flow raEe of 250 gpcd is applicable,
proposed new lnterceptor lines are stzed for Eransportlng serdage from the
ouclylng and undeveloped areas lnto the main trunk of itre systetr.
A 12 lnch oain wlll be lnstalled west past First Screet, and 8 inch collee-
tors extendlng north and wesE will feed lnto it. To handle waste discharges
from the areas dlrectly north of townr 8 lnch branch l1nes wlll enpty into a l0
lnch interceptor running along Seventh SEreeE. Wastewater from the eastern end
of the planning area trlll be eollected in 8 inch lines and punped via a 6 lnch
force main into the centrJl "y"t"r. As indicated in Figure 7, these Iines are
included for future planning purposes only.
The parcels of land on the Conprehensive Plan nap lriEh pro.jected densitles
of less than l0 Persons per acre were not lncluded in the servicE area boundaries.
Accordlng co EPA regulatious, collecElon sysEerns, if extended into areas thls
sparsely populated, nust clearly be uore cost-effective than othel alternatlves
such as septlc tanks /
In lighc of the discussion ln Section 4., an evaluation ofcche cosE-effec-
tlveness of naking reuedial repairs to the collection system .is considered un-
necessary. The totn iEself nay establlsh a tlne frame for eltninatlng lnfiltra-
tion and lnflow within the wasteurater collection network, or 1t. nay proceed with
repairs if its economic situaEion peruits. However, no rehabillcation will be
lncluded in the 20I cost analysis. As extensions of exisEing Iines are consEruc-
ted utlllzlng hlgh quality pipe with reduced Ieakage porenrlal, infilErar,ion on
a per rnlle basls wlll be reduced-
lo
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I
I
O
The ilft. statlon and force maln to the east of Eown are glven deferred
Xtatus ln a Iong range loprovements progran.
For the purpose of slzlng the proposed lnterceptor sewer underneath Inter-
state 70, a 40-year destgn period is approprlate. Assr:mlng a trlbuCary popula-
tlon of 71000 wlll be served 1n the year 2020, a l5-lnch trunk llne ls necessary
aE the olnlmun 0.22 grade. Thls line will pass Ehrough a 24-inch borlag under
I-70. OnIy thls lntercepEor and the one extended to Kruger Subdlvlslon are con-
sidered grant eligible, and they are included 1n the cost evaluatlon as follows:
8" sewer pipe 1200 L.E. ar $13.00
15" sewer pipe - 1300 L.F. aE $26.00
Boring under I-70 - 250 L.F. ar $125.00
Sauitary selrer uanholes - 10 at $900.00
PLus 257" for conringencies, Iegal, fiscal an{
engineerlng fees
$ l5,600
33 ,800
3l,200
9,000
$ 89,600
22.400
$1I2,000
O
Modlflcations, including planned fuEure expanslons, are superiuposed on the
-exlsting layouE in Figure 7.
-44-
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FIG URE 7
SI LT
PROPOSED EXPANSI ON
OF THE WASTEWATER
COLLECTION S YSTEM
rrrtrrrrrrrr INCLUDED FOR 2Ol COST
. EVALUATION
rffi.o INCLUDED FOR PLANNING
PURPOSES ONLY
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4
-45-
SI.'M},IARY OF ALTERNATIVE COSTS
AI EernaEive ProPosaIs
122b34
New PIanE ConsEruct,ion 616,000 481,000 434,000 472,000 688,000
Phase II Constructlon 88,000
InEerceptor Costs 112,000 112,000 112,000 112,000 112'000
Annual Operation & Maintenance 32,000 19,000 19,000 19,000 23'000
Present Worth of Annual 0&M 342.000 203.000 203.000 203.000 245.000
Total Present Worth of Costs I,070,000 795,000 794,500 787 '000 I ,046,000
Grantee Share of ConsEruction
Costs wlth 752 Fed. Asslstance I82,000 i48,000 136,500* 146'000 200,000
The present lrorth of costs ls flgured using an inEerest rate ot.6-7182, aud
a 2O-year annual cash flow perlod. For Alternative 2b,, the Phase II construction
costs have been broughc forward fron I0 years in the fuEure. It should be noted
that Federal grants for ellgible cotrponents of treattrent erorks uEillzing Iand ap-
plication will be 852 rather than 752.
Expenditures for both labor and polrer are included in all annual operation
and maintenance costs, and labor ls figured lnto the cosEs for capital construc-
tion as well.
*Phase II costs excluded.
-46-
7. EVALUATION OF ALTERNATIVES AND PLfu\ SELECTION
VTEUS OF PUBLIC AND CONCERNED INTERESTS
Proper det,erElnatlon of the trost deslrable lrastewaEer oanageEent oPElon
requlres publlc lnvolvemenE ln the facillty plannlug process'
At a hearlng held ln Sllt on !,tay 8, 1978 the proposed alEernatlves !'ere
presented for publlc dlscusslon. Alternatlve 3 was reco"'-ended for fuoplementa-
tion at thaE hearing as well as a second one held August 15, 1978' Wlth the
addltional lnforoation gathered since that tirne, Ehe recomended alternatlve has
changed Eo No.2 (renovation of the exisEing lagoon). e suunary of the pertlnent
details of a hearlng held June 11, t979, is provlded ln Ehe Appendlx'
EVALUATION AND RANKING OF PROP.OSALS
As a means of ranking the alternatives according to their relative beneflts'
each is assigned a scalar lndex value for an assorttrent, of crlterla' as Shown
in Table 6. Ihe higher nurnbers denoEe a greater degree of favorableness' A
discusslon of the ratlonale behind t,he ranklngs follows.
TASLE 6
RANKING OF FINAL ALTERNATIVE PROPOSALS
RANK OF ALTEEXATIVE PROPOSALS
t) Environmental Effects
2> Monetary CosEs
3) Ioplenentation CaPabilitY
4) Contribution to Water QuaIitY
Objectives and Goals
5) Energy and Resources Use
6) RellabiIity and FlexibilitY
I
3
z
4
34
.,7
JL
42
33
3221
2 3 3 3,
3444
L7 ZO 20 'I9
2
4
3
4
2b
4
3
4
4
4
2
L7
l)
TOTALS
Environmenral Effects - High noise levels and dusE nay .be generated by con-
sErucEion acEivlEies for alI the alternatives. Land EreaEEen! could affect
public healrh, especlally if spray irrigation methods are enployed' Horr
ever, t.he proposed applicaElon sice is far enough away from town thar Ehe
hazard 1s inconsequenEial. odorous condltions mighc develop 1n the stora8e
pond during the sPring thaw-
_t,1_
2)
3)
Sloce land out,slde the exlsting plant wlll reuala uudlstrubed, the alterna-
tlves calllng for renovatlon of the preseDt poods are advantageoua. Con-
structlou of addltlonal facllltles lu the floodplaln 1s avolded, and the
posslblllty of degradlng essentlal habitat for threatened or endangered
terrestrtal species ls nlnlulzed.
Monet,ary CosEs - See Sectlon 6.
Iuplementatlon Capablllty - Alteraative 4 ls penallzed because a sultable
agreeoent musE be negotlated wiEh the landowner, and the towats water rlghts
possibly lnproved to cover the increase ln consumpt.lve use. Potentlal
problens with acquisitlon of the land for Alternatlve 3 are responslble for
the reductlon In lts points. As staLed earlier, coademn^Elon of thls land
1s not a pracElcal solution. An anicable relationship uust be nalntalned
with the landowner on whose property the townr s water collecEion and treat-
nent facllitles are located. AIso, enlargement of. Slltrs seerage treatlDent
capaclty Eust not be delayed through the long drawn-out condennaElon pro-
ceedlngs.
Contrlbution to Water Quality Objectives and GoaIs - Atl of the alterna-
tlves will ueet secondary treaEmenE requirenents if a suspended sollds
llnitation of 75 ng/l ls appllcable for the lagoons. If not, an algae
reuoval process uust be considered for Alternatives 2 and 3, to bring ef-
fluent suspended solids concentraEions wiEhin the 30 ug/l restricEion.
Wastevater treatlrent chrough land applicatlon is hlghly desirable for
Eeetlng the scated objectives of resource recycling and zero-discharge
by 1985..
Energy'and Resources Use - Mechanical Ereatnent ls less enerqy efflcient
than E.he oEher alternatives. Land application, for exampLe, requires
power only for clarlficaEion and pumping. With land treaEment, nutrlents
in wastewater effluent are uEilized rather than discarded. ; Cott"quentIy,
Alternative 4 pronoEes reuse of a valuable resource, ^nd,
saves energy
which could otherwise be constrmed in fertilizer produeEion.
Reliablllty and Flexibility - The aerated scabilizaEion ponds are less
susceptible to process upsets and do noE require as much roainEenance as
the oEher rreatmenc nethods. Nelther sludge disposal facllltles nor a
full-time operator is neeessary.
'o 4)
s)
6)
lo
lj
Wlth Alteroattve I, the llkellhood of nechanlcal fallures 1s lncreased.
llowever, there would be ample space for future expanslon of a uechanlcal
pIanE, and the exlsttng cells could be retalned for storage purposes.
Land appllcatlon requlres a good deal of mein.Eenancer lncludlug elte
preparatlon, tranual control of the dlstrlbutlon system, aad uronltorlng of
groundwaEer levels and quallty. Ihe flerlblllty of Alternatlve 4 ls Ilulted
by changlng weather condltlous and the avallablllty of addltlonal land for
expandlng the systetr.
SELECTED PLAN
Based oo the couslderaEions outllned iu the precedlng analysis, AlternaElve
2 ls selected for iupleuentat.lou. It is favored over Alteruatlve 2b, which has
Ehe same ranking ia Table 5, because very sinllar costs were arrived at for each,
even Ehough no lnflation factors were applled to the 1990 prices for the staged
f acll ity. i.
In spite of the mAny advanrages associated wlth the Iand appllcatlon alter-
nqElve, econouic consideratlons rule out lEs ltrplernentatlon. The cost of land
O"ar"rra exceeds EhaE of the most cost-effectlve alternatlve (No. 3) by much
nore Ehan t.he recoumended liniE of 15 percent.f A land appllcation progran
could cosE Eore than the anounE stlpulated in Sectlon 6 if pre-treattrent Eo a
secondary level (BOD less than or equal to 30 ag/L, suspended solids less than
or equal to 30 ng/l) is required. According to Colorado Department of Health
Guidellnes, pre-treatnent requirenenEs for crop lrrigatlon wl[1 be deteruined
on an ludividual basis.
O. PRELIMINARY DESIGN
The facllltles proposed for constructlon are aerated etablllzatlon ponds
followed by a pollshlng poud, a gravlty lBterceptor Eerrer underneath loterstate
70, aud a gravlty 6euer llue extendlng fron tbe Kruger Subdlvlglon on the sest
slde of Eown. The t,reatnent facll1ty wlll dlscharBe to the Colorado Rlver, but
posslble storage of effluent 1s provided ln the exlstlag uareconstructed pond.
DESIGN OF AEMTED STABILIZATION PO!{DS
the following crlterla:The saste treattrent system deslgn 1s based upou
Deslgn Flov
BOD Loadlng
Mean Maxlnum Summer Ternperat.ure
Mlnlnum D0 Concentration ln Ponds
236,000 gal/day
394 lblday
2L" C
2 agll
Wastewater is retalaed ln t.he flrst cell. for Ehree, days and ls aerated by
four 5 hp nechanlcal surface units. Separated frou the flrst cell by a cotrcreEe
parEltlon, a second cell provldes 8-day storage capaclty, and ls equlpped wlth
Jour 2 hp surface aeraEors. A pollshlng pond wlth three days' retentlon allows
-(ulescent settllng prior to release of the effluent. Provislons should be nade
to allow bypasslng any cell, and operatlng with it out of service. Flexlblllty
deslgned lnto the piplng aud aerator arrangetretrts wl1[ accoupllsh thls. Detalls
of the proposed facilities are shown in Figure 8.
A recordlng flow Deter wlll converE wat,er level Eeasuretrent ln the exlstlng
Parshall f lune to dlscharge values for contlnuous lndrc_at,1on. Ttre f low recorder
will be equlpped Ltith a mechanical totallzer and protectlve cover.
To eos,rre Ehe proper removal of pachogenlc orgaoisms frou the, wastewater ef-
fluent, addltlon of a chlorine solutlon 1s proposed. Chlorine Eas rls lotroduced
through an ejector-dlffuser assembly, and the effluent passes through a plug flow
basln having 30 nlnutest decentlon at peak flow. A weatherprooft enclosure wl11
house Ehe chlorlne gas contalners and equipuent
Because conslderable seepage fron Ehe existlng lagoons is evldenE, and a
maxlmum raEe of Ll32 ot an lnch per day ls allowed, liners wlll be lnstalled ln
the ponds. 'fhe dikes will slope at Ehree to one vertically, and provlde a 7 foot
Jater depth and 4 foot of freeboard. The sldes and top roay be dressed up with
- soll Eaterlal extracted durlug pond deepenlng.
?r - i --.-tlrl
!l
i,'r
I
t_r
\
\\\i-\-\\\i
I
It't-
I
I
I
I
I
t*--r-)
RDER
P
ATORS
oi,
__iI.
#iEry;;1/o;;;;ilI
\-
200- -=-- ^ 40
SCALE l"=2OO'___
l:i
lt
FIG. 8 PROPOSED WASTEWATER TREATII|ENT FACtLtTtES
\.\.s-.' \r-\*. ,\ \\,-:_ -- i
-. =--
- 6t-
rl
'F-;,,la
,l r
i c \s-_
.-j:_--
t
l-
-J,'l
\
I
- i-;
I lf S. el.'
A one-foot thlck layer of rlprap placed outslde along the bero wlll protecc
the facillty fron darnag€ by the 100-year flood.
COSTS
Detailed cost breakdowas are glven lu Sectlou 6. The total capital cost of
Ehe project 1s $5541000, and annuel operatlon and nalntenance ls expected to cost
$19,000. A breakdown of annual expendltures ls as follows:
Electrlcal Power $ 7,000
I/2-tlne operator 8,000
Chlorine and Mlsc. Cheuieals 2,000
2 .000saupllng' Effluent Testing
Total $ r9,o0o
q
9. ARRANCEMENTS FOR IMPLEMEX{TATION
INSTITUTIONAL RESPONSIBILITIES
The towu of Stlt hag the ablllty and authorlty to construct, operaEe aBd
malnEaln the proposed facllltles. A resoluElon of intent by the town to con-
strucE and operate the facllltles is lncluded ln the Appendlx.
IMPLEMENTATION STEPS
Alloylng 3 uoaths for Federal and St,ate review of the conpleted facillty
plan, authorlzatlou to deslgn and coostruct the proposed faclllties 1s expected
by October I, L979. If conpleted englneering plans and speciflcatlons aud all
necessary pernlt applicatlous are submitted and approved by Aprll I, 1980, aod
fundlng ls uade avallable, construcElon should be underway before June and
coupleted by August 31., 1980.
OPEMTION AND MAINTENANCE i,
A plan of operatlon and malntenance wlll be prepared along with the con-
sEruction drawlngs and speclflcatlons. The O&M plan will detail speciflc staff-
O
ing, tlalninS, satrpllng, and malnteuance requirements to provide for efflcient
operaEion of the faclllEy.
Wlth regard to staffiug, a L/Z-tlme operaEor would adequately fulflll the
Eanpower requirements for a treaEnent facility the size and type of the proposed
one. Thls certlfled operator could be a full-tine eoployee of the toqrn respon-
sible for ot,her dut.les besldes mainEainlng Ehe sewage dlsposal sysEem, or an
operaEor whose servlces are shared with another wast,ewater EreatmenE entlty in
the reglon. One of the persons presently enployed by Silt ln a utiliEy oalnten-
ance capacity has expressed a wlllingness to take Ehe Eest. for a 6lass D opera-
tor's license ln the fall of L979. 0n rhe other hand, the Certiflgation Board
of che State Health Department has no problem with allowing an individual opera-
tor Eo handle trore than one wastewater treaEoenE piant in the "i.".
The lntent aE present ls to have effluenr samples shippdd Eo and tested by
exisEing laboratories ln Ehe region, such as one in Grand JuncElon, or the Upper
Eagle VaIIey faclllty aE Avon. The $2,000 yearly allocation for effluent ooni-
toring wiil cover Ehe costs for transportation and analysis of samples, with
tescs for BOD, suspended solids, and fecal coliforu count belng perforued on a
quarcerly basls, and for pH and residual chlorlne on a weekly basis.
_q.r_
FINANCIAL REQUIRE}GNTS
'
Fu"a*]"t aa"
"Z
of conetructlon costg noc covered under rhe Federal
Sewage Works Grao.t ls expected to come from an Energy Inpact. Assist.ance Fund
Grant avallable through the Colorado DepartmenE of Local Affalrs. Therefore,
the costs to be borne by the town and repald through a u6er charge systeo uray
be llnlted to the annual operatlon aud malntenaace cosEs of the facliity. These
costs are estlEated to be $191000 per year, whlch works out to a regular Eonthly
charge of under $5.00 for each of the 370 services presencly connecEed to che
systen. AntlclPatlng that lncreased sewage dlsposal costs would result when a
wasEewaEer facilltles plan was lmplenented, the town board voLed Eo adopE a
corresPondlng upgraded service charge ($9.75 per Eonth). Inflation and future
uore rigid wastewater EreaEBent standards will llkely drlve this figure higher
in the years Eo coue.
If Energy Impact Asslstaoce Fund uonies are not al.located, and SiIt ls
forced to pay the entlre grancee share of constructlon costs, Ehe total annual
charge for debt retlreBent as well as operatlon and malntenance of the systetr
could be $32,000. The resultlng lndividual servlce charge Is about g8.00 per
tronth, which Is still less than the present nonEhly fee by $1.75.
By the E,ime the wast,e treatmenE facilit,y becooes operatlonal, tlore services
will be added to the collectlon network, and the monthly service charge flgured
accordlngly. Even Ehough a couple of lean years might be experienced lnitially,
the Eown of 511t is conscienElous about lnposing undue hardships on certaln clti-
zens with lnnoderaEe service charges. For lnsEance, utllitles are provided ro
disabled persons or those over 65 for one-half the regular price.
Kruger Subdivlslon - A servlce agreement is expected to be rjached between
Silt and Ehe Kruger Subdivision before a flnal rate of rernittance is deterulned.
The Eown is contenplating charging l-Ll? times the regular tap fee and nonthly
service raEe for users outside its boundaries. Silt and Kruger'h.rr" agreed chac
the subdivision will be responsible for paying Ehe grantee share of the inter-
cePEor exEenslon to ic.
The annual charge for retirement of a g51250 debt over a 2O-year perlod is
about $490.
-54-
IO. SUMMARY OF ENVIRONI.IENTAL CONSIDEMTIONSo
0utflow from the present
perroiE conditlons ln the past
degradatlon of surface water
The exlstlng condltlons are dlscussed ln Sectlon 4 of thls plan. Related
lnforgatlon about the colorado Rlver flood plaln and affected plant and aoiual
comrnunlties is provlded ln the Appendlx as well. Although a slte-speclflc cul-
Eural resource survey has noc. been cond.ucted, construct.lon of a treat.ment facll-
1ty ls not exPected to have slgnificant adverse lnpacts on unlque archeologlcal
or hisEorical areas.
EVALUATION OF ALTERNATIVES
The envlrontrental accepEabillty of the various al!.ernaElves is consldered
in Section 7' As noted Ehere, soue of the environroental drawbacks assoclaEed
with new facillty constructlon are avoided in the ucilization of an existlng
planE locatlon' For lnstance, further construcEion ln the flood plaln and de-
,Eradation of essentlal wiIdllfe habitat is prevented. Additlonally, condenrul-
tion proceedings to acquire ocher land could resulE in Iengthy delays and social
hardships.
Alternative 2 is particularly aEEracEive from an environmenEal standpolnt.
This faccor is in large part responslble for its selectlon as Ehe reconrmended
aI ternacive.
waste EreaEEent facllity has vlolated dlscharge
, and a "no actlon" plan will result in contlnulng
qual i ty.
and the
nolse and
ln an 1r
itrpac Es
EWIRONMENTAL, EFFECTS OE SELECTED PLAN
Durlng consErucElon, the environmenE ruay be tenporarily distqrbed
Eolrnspeople subjected to nuisance conditions in the foru of equipmTnt
blowing dust. construcEion and operaEion of the facillEy both resulE
retrievable comitmenE of manpower and other resources. These id.r"a"u
musE be conpared with the Iong-term benefits of improved watFr quallty, includ-
ing reduced conEaminatlon potential and ellrulnacion of a health hazard from nal-
functloning syster.s such as in Kruger subdivision.
For the Facility Plan, Iand use patcerns and populat.ion densitles are con-
sisEent wlth Ehose adopted by the Eown and the colorado wesE Area council ofo
-55-
Governments.. Iherefore, growEh should not
for by t.he cornuulty.
be lnduced beyond the level planaed
l{lth the antlclpated lncrease ln slltts populacloa, presently undeveloped
land wlll be subdlvlded and developed. The adverse envlronuental effects of
this process should be lessened due to the towurs pollcy of fosterlng contlguous
growth aad 1ufllllng' At least ouElylng agrlcultural lands or envlronnentally
senslElve areas will not be encroached upon lo.lElaIly.
consrstent wlth EPA policy to preserve and protect envlrounentally slgnlf1-
canE agricultural lands, the Town Board of rrustees has adopted a resolut,loa en-
couraging growth away from Ehero. This resolutlon whlch is included in the Ap-pendix as ExhrblE H reco'nnends that developmenE not take place in areas lnvolv-ing priue agrlculEural land- However, the rights of indlvidual properry ormersare co be upheld.
The flood plaln ls another area where developmenE ils dlscouraged, as evld-
enced by the Garfield county regulacion perulttlng "only sui:h uses ln deslgnated
flood plaln that will not endanger rife, hearth, pubric safety or property rn
tlmes of flood'- (see ExhlbiE c-5) since some threatened or endangered terres-trial species uay be found along the rlver, nlninizing disturbances io theflood plaln is deslrable.
o
O
(l)
REFERENCES
Coloradb Heet Are?_gfaf t 208 PIan, Colorado l.Iest Area Councll of
;e Peceober, L977.
(2)WaEer 1lty Manageqqnt Plan' Colorado Rlver Basin ln Colorado' Nelson'
Haley, PaEtersoo@ t975'
(3) Water Quallry Daqa.Bage Upd?te: colgrlgo and whlEe Rlvers, Nelson' Haley'
PatEerson "i7 q"rrt, rnc., october, L977 '
of
FebruarY'
1977 .
General Plan for Garfleld Countv' 1958
Govern-
(4)
(5)
(6)
l',
1976. t.
(7)EvaluatlonofQelestedCotrDunityNee-ds:l::P"ttdfortheColoradol'Iest
Area Counqit ot Covernu"rru"lfiiiffiifsmlth & Assoclates' Consultlng
Engineers, August, 1975'
Land Treatmenc of Municipal I.Iastewater, EPA Technology Transfer, october'
1977 .
clrv of Rifle, 9glgrado Facilttles Ptan, Nelson, llaley, Patterson and Quirk'
GT- october, 1976.
@op,ent corPoration'
Colorado, WlId-
(e)
( 10)Potential ct of the P roposed
Q. Tolroan'Prepared
{lt
in
ceologrc Hazards IdPBtif lca!ign Stgdv f or 9af f1.9Id Cou?t!'-t-:-"11"""t'
andFlnaIReports,Lincoln-oevoruaryandApr1I,
(ll)nssentia! ItabitaE for Threate red Wildllfe
the Colorado Division of Wi dli
NaEuraI Recources, JanuarY, i978'1 D"-toent of
(I2) Annonia Toxictty, t'IiIIian.T. WiIIingham, Control Technology Bianch of the
waEer Dlvision, u. s. Environnental Protection Agency, Regfon vrrr'
FebruarY, L976'
.,
-57-
,c.
o
APPENDIX
'a
o
E)CIIBIT A
"rr.t,i
Renewa I
Permi t No. CO-00291 8l
CouncY; Garf Ield
Control
lJa te r
AUTHORIZATION TO OISCHARGE UNOER THE
NATIoNALPoLLUTANT-otscnlneEELlHlNATl0NSYSTEH
lncompiiancewiththeprovisionsofthe.FederalllaterPollution
Act, as amendea'ijl q.S.q. 125;'";:-;"0; the I'Act")' and the Colorado
Quali ry conrrol n.-. izs-e-lol ;.:-;;:l'cns ,1973 as amended)
Town of Silt
isauthorizedtodischargefrcmtheirwastewatertreatmentfacilities'
o
in
located in Silt, Colorado'
to the Colorado River'
S i gneci chi s '2 ) daY
COLORAOO OEPARTHENT CF HEALTH
0ivi s ion of Admin i s't-rat ion
Assistant 0irector, 0ePartmenE
Envi ronmenta I Heal th
accorCance with effluent I initations '
"ii,i""t
t.a forth in Parts l' Il' and
moni toring raqui refl:ents and oiher
I I I hereof.
This permir shall beccme effeccive thirty ljo) d:y,,:I::. the date of
receipt oi tn;s perrit by the Appiit"nt' Should the Applicani choose to
ccn-,-esr any or tie ef f luent r ioilation' ' moniioring requii':':nts or other
condirions.on."ined herein, h";;;t-complY ';;l'ilttiJi 2\1\-1Oq cRS 1973 anci
che Regulations. for the Scate 6rt.i"tst i"t,,it Syster'r' Fai lure co contest any
such efiluenr t i*itation, mcni;";ing l.qui rem"nr; or cEher conditlion is consent
to- ti'1" cond i t ion by che App I i cant ' /
This permit and the authorization to discharge shall expirp at midnight'
December 31, l98l'
/'1 t ),
CEIiTIFIID LETTE ?, I,IO. ',//i //,/
DATE Siii:LD .-t '')2'--7n
EFFEC i ll,'i 'J."T[ 0F
PERfuIiI
--/ ioi '//.r L ''
oi Heal th
PART I
Page 2 of 13
Permit No- CO-0029181
REqUIREHENTS ' SEE AMY AOOITIONAL REQUtREilE}ITS
EFFLUENT LTHITATIONS AND'I{ONITORING
Effl uent Parameter
UNOER PART III.
l. Effluent Limitations t
ouring rhe period beginllls no lacer. chan immedlatelY and Iasting
chrough J"""r,u". li, lggi , the permictee is auchorized to discharge
from outfal I (s) serial number(s) :' OOI - sewage plant outfal I
0 i scharge Limi :at i.9l:-
rlax imurn Ccncent ra: I cns
ng/ 1
/-day avg -
N/A
q!
l{5
I 2,000
I
!
I
i
Florv - *3/o^y(nco)
800 5
Toca I SusPenCed Sol i ds
]" I Col i iorns-Nur'rber/i 00ml
Total ResiCual Chlorine
pH - units shall remain between
Oi I and Grease shal I noc exceed
be a 'risible sheen'
m9/ I
l0-day avg.
N/A
30
30
6000
5.0 and 9.0 !!.
1O ng/1 d/ iir anY grab
r,r9l I
Da i liz Hax.
il/A
0.5
)
/
i
samc I e nor shal I
v
V
dt
!
4 !v
:he r'-
o
PART I
Page )
Permi t No.
of ll
c0-00291 8t
A. EFFLUENT LIHITATIONS AND MONITORING REQUTREHENTS (Continued)
Z. Hon i tor i ng Requ i rements
ln order to obtain an indication of the probable cornpl iance or
non-compl iance wi th the effluent I imitat ions speci fied in Part I , the
permittee shalI nonitor and report all effluent Parameters at the following
requ i red frequenc i es.
Effl uent Parameter
.?
Florv - n'/Day (mcO)
BOD. !,
' Total Suspended Sol ids il
.e."1 Col iforms-Number/loo ml
,PH
0i I and Grease
Total Residual Chlorine
Heasurement FreguencY
Weekl y
Quarterly
Quarterly
Quarterly
Week I y
Week I y
Week I y
Samole Type
I ns tantaneous or
con t i nuous
G rab
G rab
G rab
G rab
Visual ,observation
Grab
)
i;'rg /requ i rements
at the sewage
i
el!
i.
v
Se I f-mon i tor i ng samP I es taken i n comp I
specified above shall be taken at the
p I ant outfa I I pri or to mi xi ng wi th the
iance with the monitor
fol lowing location (s) :
receiving waters.
(D
PART I
Page tr of 13
Permit No. C0-0029181
EFFLUENT LIHITATIONS AND HONITORING REQUIREHENTS (CONtINUEd)
Foo cno tes
al This I imltaCion shall be determined by the arithmetic mean of a^minimum
= oI .nr." (3j .onsecutive samples taken on separate weeks in a 30-day
;:.il-i*inirur tocal of iiil. ili samples); not aPPlicable to fecal
collforms - see foocnote c/.
b/ Thls limitatlon shall be determined by the arlthmetic mean of a minimum {
:: oi'in.". ilt consecuEive samples taken on seParate days in a 7-day period
(minimun ."1"i-"r-itti.. (ri ;"illes); not aoplicable to fecal col iforms -
see foocnote c/
c/ Averages for fecal ccl iforns shal I be deternined by the geca':etric rnean
= of-" rinimim oi-if'ttuu (3) consecutive grab samples taken during separate
weeks in a 30-day period for the 30-day average, and during seParate.cays
in a 7-Cay period for rhe .-day average. (miiinum tctal of three (E)
samples).'
d/ Any discharge beyond this limitation as indicaced by any single analysis
and/or measirernent shal I be considered a violation of the ccndition of
this Permit-
e/ quarterly samples shall be collected during the rconChs of l'larch' June'
Sepcember, Decernber, if a concinual dlschaige occurs. - lf the discharge
occurs on an inCerr,ri ttent bas is, al I Che sanp les shal I be ccl lected
during che period when thaE int,ernittenc discharge occurs'
y See defini tions, Part B-
a/ ln addlCion to rionitoring the f Inal discnarge, iniluenC samples shall be
.7.:Caken and analyzed for tiis paraneter aC the same freguency as requireC
as for chis parameEar in the discharge' )
y Monitoring is required cnly when chlorIne is used for disidfection'
i/ Honitorlng is required only during periods of discharge.i lf "no cischarge":: o."u.r, t[is shall be reported aC ihe specified frequency' (See Part 3)'
/
3.
.o
}. HONITORING ANO REPORTING
' l. Representative Sampl ing
l' Samples' and measuremencs taken as requi red herein shal I be representative
of the vo I ume and nature of the nron i tored d i scharge.
2. Report i ng
Honitoring results obtained during the previous 3 months shall be sunrnarized
for each month and reported on applicable discharge monitoring report forms,
postmarked no later than the.28th day of the rnonth following the completed
reporting period. The first report is due on Apri I 28, 1977.
lf no discharge occurs, "No 0ischarge" shall be reported. Duplicate signed
copies of these, and all other reports required herein, shall be submitted
to the Regional Administrator and the State at the following addresses:
U.S. Envi ronmental Protection Agency
l860 Lincoln Str'aet - Suite 900
Denver, Colorado 80203
Attention: Enforcement - Permit Program
Colorado Department of Heal th
water Qual ity Control Division
4Zt0 East llth Avenue
Oenver, Colorado 80220
0efinitions
PART I
Page 5 of l3
Permit No. C0-0029181
asa
two (z)
s ing le
the d i scharge
a.
b.
A "compos ite" sample, for rnoni toring requ irements, is def ined
minimum of four (l{) grab samples col lected at egually spaced
hour intervals and proportioned according to flow.
A "grab[ sample, for mcn i toring requ i rements, i s defined as a
"dip and take, sarnple col lecced at a representative point in
s c ream.
An Iinstantaneous" measurement, for
as a single reading, observation, or
faci I ities.
d. r'Discharge" includes but is not limited to,pouring, emitting, emptying or dumping.
Test Procedures
fest procedures for the analysis of poilutanEs
publ ished pursuant to Secrion 304(g) of the Acr
Limi rat ions (400) , under which such procedures
Record ing of Resu I ts
monitoring requirements, is defined
measu rernen t us ing ex i s t ing nrcn i cor ing
)
any spi I I in9,. l/aking, pumping,
i
/
sha I I con form to regu I at ions
, and Colorado State Effluent
may be requ i reC.
4.
t For each measurement or sample taken pursuant to the requirements ofthis permit, the permittee shall record the fol lowing informaticn:
fhe exact place, date, and time of sampl ing;
The dales the analyses were performed;
a.
b.
o
d. The analYtical tachnlques or
c. The results of all requlred
rAtr I
Paga 5 of 13
Pcrmlt No- co-0029181
methods usedl and
analyses.
6.Addl ttonal Honl toring by Permittee
lf tho permlttee monltors any Pollutant ai.the location(s) cesignated
hereln more frequently than ."i"i.ia Uy Shis permit,-uslng approved
analytlcal *oanlJr' "s' sieclflel-abovo, the resul ts of such monitorlng
shall be Inclri;J-ti tha "atc,riailon ind rePortlng of the values
requlred ln thE Dlscharge Honltorlng Report ioint iEpn Xo' 3320-l)'
or other'forms as requlred by-ilro Oirlslon' Such IncreaseC f requency
shall also be Indlcated
Records Retention
Al I records and Infornnatlon resul tlng f rom tfre moni toring activi tles
requl red by thl: perrnl t Ineludlng -a!] reccrdl of analyses performed
and calibration and malntenan.= 6f Instrunentaticn anC recordings
from ccnttnuous nrcnl:orlng Iniirun"ntatlon shall be relaineC for a
minlmum of three (3) vears, ;;-ioig"r if requested'bY :h" Regional
Acminlsiraco. ;; i[" !t"tt-llater Qial lry control Dlvisicn'
7.
A. HANAGEHENT REQ.U I REI'IENTS
Permi t No. co-o029lBl
aoverse
Lr' drrT
accaleraieC
anci ii:caci,
fr.Change ln. 0lscharga
All discharges authortzed herein shall be ccnsis:ent with the terms and
conditions of this perr-,rit. The discharge of any pollutant identif ied
in chis permit ro.o-iruqu"ntlV-tiai-o. l. " levei in excess of chat
authori zed shal I ccnsti tute " ,iofation of the permi t' Any anticipated
change ln discharge location and/or faci I ity expanslons' production
increases, of p.ol,=r, modif i""iion, which wi ll resulc in nar' diiferent'
or lncreased discharges or Poiiui.nt, musi be reported-by submission of a
new Np9ES application or, if t;;;-;i"ng", vrill nct violate che effluent
llmitarions specif ied in thit p"iti., [y notice to the State tdater
eual i ry Conirol Divislon of ,uli'"n"ngui- Frocess modifications include'
bur are not limited to, che int."Ju"rion of ";;-i., pollutant not Previously
idenrified In the permit,.. ";;-;;iur-.oaifications
which may result in a
discharge of a quanEity or quality different. frcm thai which was applied
for. Following such norice, ih.-p..oir may Ue iodifieC to speciiy and limit
"iy poll utants noE previously I inrited
i'loncornP I i ance )loc i f i ca: i oa
a. lf , for any reason, ihe permiEi,e3 coes not tcnoly with^any naximum effluen
limicaEicnscecifiecin;hisper,titcheperniti,eeshallprovidethe
Regionai Acministrator anc the sta:a uaier Qual i:y ccnrrcl 0ivlsion
with rhe followi.g infcr;r]ri;;,-i. *.iiiig, within five (5) Cavs of
beccrning aware of such ccndi tion:
(l)Aiescriptionoithedischargsandcauseofnoncomplianc:;and
(z) ihe perioci of nonc:molianc=, i.;:clucing exaci dates and iime; or' ii
nct cori-ected, tne an:icipated ti;; ai" n.n.=npl iance is expec:ed
tocsniinue,andSiepsbeing:akenici.ecuce,elirninaieandoravent
re=urrence of ihe nonccfiolying ci scharge'
',c.Thepei.li:i..e,asSCCnasithask;io',vl:dge:he:..-cf,shallnciify:he
Siare,,Jarer Quality Conci'ol 0ivision or ln'7 spill or'Cischarge of a;y
ooilutant,noEoiherrri,u""ihori:edi;rlhispernit,whichmaycacsa
pol lu:ion of waisrs oi the S:ace' )
3. Faci l i cies CPeraiion "
/
The peri,iritte: shall ar all tines mai.niain in Eocd rvorkiig order and
operaEe as er-iiciently as ocssible all ti'aati':ien: or ccnirol facil ities
or sys:ems insiall--c c. ,rua-ly ihe periItit:ee :c ach'i'e'/3 c3i]]Diiance
wich the teri:1s ani ccncitions of :his pernit'
.loverse l;rPac:
The oernitt:-- shall iake all i-3ascnable slecs ic minini:a any
inpacticwacersofi:.ieSiatei-esultinEf;-:nncnccncliai:c:"vi
eifluenclini:acicnssoeciiiecinthis:ernit,inclucingsucn
or addi tional mcni roring as necsssary to Ceternine t:te nature
of ihe nonccnclYing CischarEe'
t.
Page 8 of ll
Permir No. c0-002918t
O 5. Eypassing (see additional requirements under Part I I l)
l-Right of Entry
The permittee shall allow the Direcior of
Civision, the EPA Regional Administrator,
upon Ehe presentat ion of credent ia I s:
6.
7.
Any diversion from or bypass of facilities necesiary to maintain compiiance
wiin tfre terms and conditions of this permit, or any activity that results in
the avoidance of any required.treatment for any process or run-off water, is
f rohibited, except (i) where unavoidable to pre./ent loss of I ife or severe
[rop"ray damage,'or'(ii) where excessive storm drainage or runoff would damage
any' faci I i t ies necessary for compl iance wi ch the eifl uent I imi tations and
prohibirions of this.permit. The permittee shal I PromPtly notify the Regional
Rarinistrator and the State tJater Qual ity Control Division in writing of each
suih diversion or bypass
Removed Substances
Sol i ds, s I udges , fi I ter backwash, or other pol I utan'ts removed
of treatment of control of wastewaters shall be disposed of in
as to prevent any pollutant frcm such naterials from entering
S ta te.
Power Fa i I ures
t.
ln order to maintain ccmpiiance wiCh the eifluent iimitations
of this perrnit, the permittee shall either:
a. Provide an alternative power source sufficient to operate
controi facilities;
ot, ii such aiternative pcwer source is noi in exisience,
its implemeniation appears in Part l,
i n the course
a manner such
waters of the
and prohibitions
the wastewater
and no .{ate ior
b. Halt, reduce or othenvise control production and/or al I discharges upcn
the reduction, loss,'or failure of the primary sourcs of power to the
' waster.rater contrrl facil ities
,)
8. Any discharge Cc the waiers of the State trcn a point sourco- other than
specificaLly authorized is prohibited.
.8. RESPONSI3ILITIES
q
the State Watar Quai itY Control
and/or thei rzauthorizeC represeniati're
a. To entei upon the pernittee's premises '.rhere an ef ilueni source is
located or in which any records ara required to be kapt under ihe
terms and ccnditicns of chis pernit; and
b. AE reasonable times to have access to and cooy eny records required to
be kept under ihe terns anC ccnditions of this pernit and to inspect any
moni toring equipment or moni toring meihod regui red in the permi t.
c. To enten upon the permittee's prernises to reasonably
suspected, or pc:,:ntial source of wacer pol lution, or
investigate any actual,
any violation of the
)
L.
not I imited to, the fol lowing: sampl ing of any
waters, Ehe taking of photographs, interviewing
knowledge relatid to the discharge, permi!, or
to any and al I faci I i t ies or areas wi thin the
have any affect on the discharge, permit, or a
Transfer of 0wnership or Control
As required by the Act, effluent data shal I
Knowingly making any false statement on any
imposition ot- cr-iminal penaities as provided
and cRS (1973) 25-8-510.
owner or cont/oller of the .existence of
shal I be for.rarded tc the Regional Admi
Control Division-
Ava i lab il i ty of RePorts
;
Except fo(r data determined to be confidential under Section
and iteguiations for the State discharge permit system (505)
prepared in accorCance with the terms of this permiC shall
public inspection at the of f ices of the Scate ',/ater Quality
and the Reg iona I Admin i strator.
this permit by letter' a copy of which
ni strator and the State Water Qual i tY
PART t I
Page 9 of li
Permit No. c0-0029181
discharge and/or Process
of any persons having anY
a I leged v iolat,ion, and access
permi ttee's premi ses that may
I leged violacion.
308 of ihe Act
, ail reporis
be avai lable for
Control Division
ln the event of any change in controi or ownership oi facilites from which
the authorized discharges elnana!e, Ehe permittee shall notify the succeeding
3.
Permit Hodification
After notice and opPortunitY for a
suspended, or revoked in whole or i
but not Iimited to, the fol lc,ring:
not be ccns idered coniidential '
such raport maY rasult in the
for in Section 309 of che Act,
hearing, the pernit maY be ncdified,
n pari during its term for cause including,
permit;
or fai lure to disclose ful lY
t,
Violation -of any terms or ccnditions of this
0btaining this Permit bY
all reld.rant facts; or
s rsp resenta t i on
d.
b.
c.A change in any condition
permanent reduction of el
that requi red ei ther a telnPorary or
imination of the authorized discharge.
standa rds , cont ro I regu I at i on or du I y
5.
Changes in water quaIity
promulgated plans would qual ify as "a change in any condition.rr
Toxic Pol lutants
Notwithstanding Part ll, B-4 above, if a ioxic effluent stanCard or
prohibition (including any schedule of compl iance speci fied in such
eff 'luenI srandard or prohibition) is estabi ished under Section 307
of the Act for a toxic poll.rtant which is present in the discharge
such standard. or prohibi tion is more stringent than any I imi taCicn
(")
and
foro ::'l-ry11::::'.,1:.'ll: ?lT:':.i?',:-:'::::,:::':.0:.:;Y;,;:1":"::o:ll"oin accordance with the toxic effluent standard or prohibition and the
permittee so not if ied.
PART I I
Page 16 of 13
Permi t No. C0-0029181
Q Civil and Cr'iminal LiabilitY
Except as Provided in
and t'Power Fa i I ures"
construed to rel ieve
noncompl iance-
permi t condi tions on "Bypass i ng" (Part I I , A-5)
(eart ll, A-7) , nothing in this permit shall be
the permittee from civil or criminal penalties for
7. 0il and Hazardous Substance Liability
Nothing in this permit shall be construed to preclude the institution of
any Iegal action or relieve the permittee from any responsibilities,
. liabilities, or penalties to which the permittee is or may be subject
. " under Section 3ll of the Act.
' 9. S tate Laws
Nothing in this permit shall be construed to preclude the institution' of any legal action or relieve the permittee from any responsibilities,' I iabi t ities, or penalties establ ished pursuant to any appl icable State" law or regulation under authority preserved by Sectioh 510 of the Act.
g. Permit Violations
Failure to comply with any terms and/or conditions of this permit shall be
a violation of this permit.
.
::.10. ProPertY Rights
The issuance of this permit does not convey any property rights in
either real or personal property, or any exclusive privileges, nor
does it authorize any injury to private property or any invasion of
personal rights, nor any infringement of Federal, State or local
I aws or regul at i ons .
Il. SeverabilitY'
The provisions of this permit are severable, and if any provisiohs of
this permit, or the application of any provision of this permic V
any ci rcumstance, is held inval id, the appl ication of such provision
to other circumstances, and the remainder of this permit shall;not be
affected thereby.
12. At the request of a permittee, the Division may modify or (erminate a
permit and issue a new permi t i f the fol lorving condi tions are met:
(a) The Regional Administrator has been noti fied of the
proposed modi fication or termination and does noi object
in writing within thirty (:o) days of receipt of nocifi-
cat i on, and
(U) The 0ivision finds that the permittee has shorn reasonable
grounds consistent wi th the Federal and State statutes,
and regulations for such modification or termination and
o
(") Requirements of publ ic notice have been met.
.t* REeutREHENr'
Addi tional Bypassi ng Requi rements
lf' for other reasons, a Partial or comPlete bypass is considered necessary,
a requesr for ,;;-a;;.ss shal I be submitted ro' the state r'/ater Quality
Control Division and'to lhe Environmental Protection Agency at least sixty
(Go) days prior to the proposed t;;t;. rr the ptopot"d b.ypass is judged
acceprable ro rhe state wate. Quliiay colarot. oiris'ion and by the Environmental
protection Agency, the bypas, *itl be allowed subject to limitations imposed
by the State Watei Qu"lity Control Division and tfie Environmental Protection
AgencY.
If,afterreviewandconsideration,theproposedisdeterminedtobe
unacceptable by the State lJater Qual ity Contt.ot_oiuision and the Envi ronmental
protection Agency, or if Iititations imposed on an approved bypass are
violated, such bypass shall be considered " 'iotation of this permit; and
thefactthatapplicationwasmade,orthatapartialbypasswasapproved'
in"ff not be defense to any action brought thereunder'
t,
Testing
Test Procedures shall conform wi
Register, Volume 38, Number 199'
ai" ut" of the Iat'est edition of
PART III
Page IIof l3
Peimit No. c0-oo29l8l
th those procedures specified in the Federal-o.iou.r 16, 1973. These procedures involve
one of the follcvring references:
aL.
3.
"standard HethoCs for the Examination of
,,ASTH", Annual Book of Standards, Part 23
"Methods for Chemical Analys is of llaters
Protection AgencY.
Waier and Waste Water",
i , !/aier, AtmosPhere AnalYs is
and \Jaste5", Envi ronmenta I
PART III
Page l2of l3
Permi E Ho. CO-00291 8l
OTHER REQ,U IREHENTS (CONI iNUCd)
o
!lithin three (3) months after the dace of perrnit issuance' a
flow-measuringde,iceshallbeinstalledtogiverepresenta-
tive values or.rrruenc volume at-some point in the plant circuit'
if not already a Part of the wastewater plant'
AtthereguestoftheRegionalAdministratoroftheEnvironmental
Protection Agency or che 0irector of the SEate Water Quality
Concrol0ivision,thepermitt"u-*u.cbeabletoshowproofof
theaccuracyofanyt]ow-measu.ingcievjce-Y'"dincbcainingdata
submitted in rhe rnoniroring r;;;;i.--The flow-measuring device
must indicate values withi" t"'"-1io) percenlr. oi the actual flow
being measured.
ThelimitacionsstatedinPARTl'SectionA'arecalculatedonEhe
basis of gross measuremenEs of each Parameter in the designated
dischargeregardlessofchequantityandqualityoftheseparametsrs
;;-;; pi.ni-inflow, unless othervi se specified'
lfthepermitteecesirestocontinuetodischarge,heshallre-
apply at t""ri-on" hundred-eiil; iiaoi davs beiore lhis permit'
exp i res.
lJi rhin s ixty (60) days of the issuance of this permii' ' che pernittee
- shall file a statemenE with the Environmuntal Protection Agency and
,rthe staEe lJater euat iry conrrot oiririon which shall contain the
narnes of the person or person, *io are cesignated !c rapor" ccndi-
Eions ", noa.d in PART ll, Section A, Paragiaph 2a (llcnccmpliance
Norification), and as nored ii-pnnf it, Section B, PaOagraph 7
(oi r and Hazaidou, subsrance'ii"lii i,vj. The permi rtee shal I ccn-
tinuallyupdatechislistaschangesoccurat'chefacil'ity'
The permiti,ee is required to submit an annual fee "rt,"t forth in
Section 25-8- 5Oz c-R.S- 1973 as amended' Faiiure io subrnit the
required fee is a violation of this permit and wi4 I resuli in the
suspension of said permit and enforcenenc aciion pursuant to Section
25.A-60l et- seq- ' 1973 as amended'
o
.
o
. OTHER neQU I RE|{ENTS (Cont i nued)
PART III
Pagel3 of l3
Permit No.co-oo29l8l
percentage Renrcval Requirements tApplies to Sewage Treatment Plants only)
lf not presently being ccmplied with,effective as soon as reason-
able and pracrical, but no'i"i.'. rhan July l, lg77!.the a!i:lT:l:^-
mean of the total BODq and the Total Suspended Solids concentratlons
for efflr"I.'l"ior"r-3"ii..i"a in a period of 30 consecucive davs
shall not exceed l5 perceit of the arithmetic mean of the concentra-
tions for influent samples col lected at approximately the sarle times
during the same period (85 percent re:rova'l ) . Thi s is i n addi tion
to the concentration limiiations on Total bOO5 ana Tocal Suspended
Sol i ds
t,
Expans ion Requi rements
Pursuant to colorado Law' c'R's' 1973 25-8-5ol(6)' the permittee is
requi red to ini tiate engi";;;ing "nd- fiiancial'piinning for expansion
of the treatment works whenever throughput and Ereatment' reaches
eighty (80) percenE of design capacitt.
-1lf,un.'ut ninety-f ive (95)
percentofeitherthehvdraulicororgani"t"!1:::l-?l.thetreatmenr
rvorks is meC, the permi ttee shal I comnence construction of the
necessary treatment expansion'
.ln- the case of a municipality, consEruction may be corrunenced' or
building permit issuance r,'"y be terminai"a, unti I such construction
is initiared, except that bui lding p.o*iii't.V continue to be issued
for any construction which woula not have the effect of increasing
lhe i nput of sewage to tfre mun i ci pal t reatment *orks ' )
o
o
o
Town of Silt EEIIBIT B
P.O. BOX t 74
SILT, COLORADO 8I652
N1gy 9, l.979
!h. Arcien Walluel
Co1orzdc Sbate Deparbment cf Health
Water Qpality Ccntrcl Dirision
lratO Best l.1th Averrue
Denver, C0. SoZZo
SutrJect: Sl.lt 2O1 St.u,ir"
. Suspenclei C;l irl.r' Variancc
Dear l4r. '*lalltrn:
E1is letter is tc nake fcrmal the Tcvn of silt's request
for a variance tc its discharge permit unde4 the retrlseci suspend'ed
sclids 1i:nltaticns fcr ruastevater treatrnent lcnds. Itre Tcwn's
.*astewater d.ischarge is present\r betng treate,i in ncn-aerated
stabilizatlcn pcnds; hcrgever, fcrnulaticn of an EPA 2OI Fecltities
Plan for Silt is cngcing, and the seleeted nethcd. of treatnent ls
llkely to change tc aerated lagccns. We t11st that a varlance under
the rlvised. suipencied. sctids linitabicns will appl-y tc the existing
faeillty as well as a planned fiiiure facillty shculd it fatt under
the heacling :f a "wasterater treatnent pcnd.. " If ycu require further
infc:maticn, cr can reecslnend any €tctlcn Silt can tal<e in expeditlng
this natter, please 1et ne kncw.
Si:rcelely,
l:,
Z * charles Rit'"er
KKBM' Inc.
?\11: i,Iest {lrtlr Avenue
Denver-, CO. 302?:;-
,4*-,4r-.t
Annette Brarrci
Tcr+n Arlrointstratcr
li_"'',;: .,-'tisuq}
-'?.('-'r
EXHIBIT C.I
JOHN V'. ROt
Director.!i:'?-1oio"
tlr. Ri.cb,ard L- Browa
Dlrdslon of Planrtlog
1313 Shermaa - Sulte 5ZO
Decver, Colorado 80203 i
Dear tlr. Brotm:
RE: A-g5 T77-5O23OO-OO4 SILT SEJER SYSTET E)G,fu\SIOI{
aND IIIPROVE{EIII, TorJll oF srLT
We have revlewed, this A-95 application for the expanslon and
loproveurent of the sewer sysEeE ln Ehe Torm oE Silt' Scep 1
(pieparatlon of tbe rnasEer plau) should loclude a discusslon
oi tir. geologic and soils conditioos la the area, and how
Chey will afiece the proposed projecE. A professional geologist
aodTor a qualified soils engineer- should be consulted for his
evaluaElon of the area and his recoaaeadations regarding the
desigu, and construcEion of thls projecE. Step II (preparation
of detailed engineering sEudies and plans) should take inEo
account the recoesrendaiions of the above individuals so thaE'
speclil desi.gn Beasures can be incorporaced, if trscessary'
Slep III (coittr,rccion of the pro5ect) should be closely)
suglr:lrlsed to assure conpliaace *ittr the desigu and consE'rucrion
specif lcaE,ions
If these sss6rmgndatlons are followed, ue have no objedtlon
to approval of this appllcaEion- If there are any quesElons'
pfe"se call us- /'
COLORADO GEOLOGICAL SURVEY
DEPAP.TMANT OF NATURAL RESOURCES
7I5 STAT: C€NTENNIAL EIJILDING - I3I3 SHEFIIA'I STHEET
oENvaR coLoRADo 80203 PHcNE (3031 492-26i1
February 4, L977
SincereIY'..-1
4 -- .) -1/J*..^-- 7 u' 7'-''n'-'-
Jaaes li. Price
Engineering Geologist
GEOLOGY
Sronv oF THE PAsr ... K:Y Tc THE FUTURE
JNP/ ls
')
P'
I
I
I
:
l
1
o
ln RrPIY Refrr To
FISH AND WILDLIFE SERVICE
AREA OFFICE COLORADO-UTAH
I{26 FEDERAL BUILDING
I25 SOUTH STATE STREEf,
SALT LAKE CIT]T, UTAH 84138
March 9, 1979
Mr. Charles M. Ritter
KKBM Inc.
7456 West 5th Avenue
Denver, Colorado 80226
Dear Hr. Ritter:
This ietter replies to your request of l
.ii'*tiaiii.'in the area of the proposed
town of Silt, Colorado'
FebruarY l[9, 1979, for information' ;;;; treatment works for the
To obtain satisfactory answers to questions 1 and 2' we suggest you
contact the cor.;;;;'6iririon or"r^riiiiii."it-tneir negronal .ffice in
Grand Junction. it. Division nas i;;;i;;.iirtt'for t[e area and their
&;;;;i-ire ia*iiiar with the proiect site'
In response to question 3,-we.sugges! YoI ":f9: to the Coiorado t"later
Quality standa"ir-ino the Envir^oifi"ntui Protectio: if5'.i lilt)t,
dui'i i i', c.i !..i i- tot-wii.t ' A1 thoush the Col or
vet to be oassiffid according io-ifie Siate stanJiras' we belitY:..]l^-
inouid be conslaereJ a coidwa[."-ti".unt.- fnit^ciassification requlres
a timit of 0.02 mg/t un-.ionireo'ailoiia'ana o.ooi-igll. total residual
chlorine (TRC) in the river. Uo-Uioiriuy, nave-Ueei'aone to determine
the toterance oi"niiir. cotoraal Ri;;; fishes to-inmonia or chlorine'
Untii such time ur-in.i. fishesi tolerances to inmonia and thlorine
are determined, we support the .tii..ii ouifineO Uy EPA and
rthe
State
of Colorado
The following endangered spec'i9s may occur in the proiecttimpact area:
Col orado squawf i sh (Ptvghochei t t' li,.i,t i , nun'p'Uit[' tiuU ( Oi lu ' cvpha ) '
bald eagie (Hat ii."iffi'pere'grine. fa)con TFalco
oereqrin6 unutff. coiffiish anb humoback ihubs occurrn
fieffia.Tn*;downstrea*i}o*tne.nroject!ii..Ba1deag1eswinter
alons the CoI.;;;; Ri;;;. -ntso,-cliiis'a1.6ns the Colorado River up-
stream from the proiect site coutO Ue usea ai nest s'ites for peregrtne
fal cons .
o
EIGIBIT C-2
United States Department of the Interior
o
Thefo.IlowingspecieSproposed.foriistinga:endangeredorthreatened
may occur in the project impact,Ir"ii--.iioiuacr suiker (Ir@-
iil". *-r, ro c k c re!,
-
i n, i u i,'.:g ; t ;i ; I' 1 g ryp.. ".*ffi. n. Il: --
ffi.:#k tr.[.r-o.cu-s in thEe6T6-Lado River dc
iect site. The two plants o..u"-ii'ei.rieid county-tn tnt vicinity of
tne Plant site'
l|leappreciatethjsopportunilvto.p-rovideimputonwildl.ifeinthe
project area. pi.uil'contact ui-i? you nave any further quest'ions'
Si ncerel Y,
Area Manager
'l
M
hot.tt H. shi elds /
2
EXHIBIT C-3
DEPARTMENT OF THE ARMY
SACRAMENTO OISTRICT, CORPS OF ENGINEERS
650 CAPITOL MALL
SACRAMENTO. CAUFORNIA 956I4
REPLY TO
arrENYroN oF SPKED-T 19 April 1979
I1r. Charles l{. RlEter
K.K.B.N.A. IncorPorated
7456 West 5th Aveuue
Denver, Colorado SOZZ6
U.S. Aruy Eagiueer Dlst'ricE, SacraoenEo )
ATIN: !lr. ttodneY Woods /Regulacory Uolt No' 4
U.S. CourE House, R'oon 230
400 Rood Aveuue o
Graud JunccLou, Colorado 81501
./.
TeLephone: (303) 243-1199
SlncerelY '
Dear llr. Rit't,er:
l.Je have evar,at,ed, the flood hazard Eo a proposed seibte waEer treat'Eent' facil-
icy site along the Colorado River aE Sllt, Colorado' as requesEed iu your
4 April let,ter. The daEa and analysts that you provided lndicaEe a realis-
rlc eval,ation of Lhe flood ptoUi-. along the Coiorado River' -lle concur niEh
your deterulaation of too-y.ar ftood elevations of 5426'3 and 54II'9 for
Lro"" sect,loos A aad B, resPecELvely'
rn conslderlng your algernaglves for a new di.ke, you rnight be lnteresEed ln
Ehe Corps of Engineersr co'sErucEioo "tarrdards for levees' For non-habltable
areas, it is recomended that levees be construcEed wlth 3:I water slde
slopes faced wir,h a 12-inch gradat,lon of rlprap i toot thlck' 2:1 land side
slopes, with a l2-foot crown,rfJit, and 3 f."t oi freeboard above the select-
ed flood-
For lnforuatlon on netrands and possible peroit, requirenenLs along Ehe colo-
r"ao nir.r, please conEact' our Grand Junct'ion offlce:
l>/*ui'-!
)ELL
lring
n-/'#t/ /c.
Eng
'1i.,
t{EDD
loee DivisionoChief '
i:3. I i '79
. . l-
EXHIBIT C-4
UNITED STATES DEPARTMENT OF AGRICULTURE
SOIL CONSERVATION SERVICE l:.<g:':A
P. O. Box 880, Glenvood SPrtugs'Co].orado 8f5of iL t-
Jlil3
J0a
JYi]
fc-
Lterch 2, L979
I"lr. Ctrar1." nitt."
K-K-B-ll-A, Inc.
th55 t+. 5th Avenue
Denver, Colorado 8OZe6
This information is of a genera-l
value to You. If Yorr need nore
SineerelY '
nature, but I hoPe r"rill be of
specific info:ration, let us knov'
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/
IRZnt.-
, C:-:
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Dear i'Ir. Rit+.er ,
,
Some of the soils in the area outlined on your ndp are considered 'uo
be prine land. There also may be some ssrall apPle orchards within
the area that nay be considered as ea.ndid.ates for inclusion es unic-ue
or inlrcrtant fa:rnlands. l{ost of the areas of prine agricr:-ltural land
are on the flatter terraces of the col0rado Fiver and other streaE
drainages in tbe areB. Trese areas are aLso irrigated' llone of the
non-irrigatec areas of soil are consid.ered as prine la'nd at this tir'e'
l.Iost of these are&s of prine lend are suitable for growing ar\y of ihe
climaticall;r ad.apted crops. Trne nain crops groun at this tine are
alfalfa hay, irrigated pasture' corn for silase' vheat and-barle:r'
?he groving season is apparently around. LLo to 130 days, althoush '[
have no d.ata to support- tri=. T',lrere are soEe soils with accr:nula-
tions of salts although these are not included' as prine land"
{' 'L7^l}>u,*r( c-4
1;; .. l4orerand
SoiI Scientist
9LL(
KE AVENUE
EXHIBIT C-5
GARFIELD trOUNTY
PI.ANNING DEPARTMENT
GLENwOOO SPRINgS, coLoRAotr al6ol
l4ay 29, 1979
PHONE 943-A212
llii , - '73
In response to a request from Annette Brand, ''ro*n.Administrator
for Siit, the followino oolicy concerning developnent in the flood
piain nai been adopted by Gari'ield County. Sect'ion 6.0.l .0.l of our
ioning Resoiution itut.t-, "Permit oniy such uses in desiqnated fiood-
;i;i;"that will not endanger life, nelttn, public safety or property
i;-;;*;-of riood." This pertaini not oniy'to the Si'lt area but a'll
areas of the County which may be prone to flooding'
Mr. Charies M. Ritter
KKBNA
7456 llest Fifth Avenue
Denver, Colorado 8022.6
Dear l1r. Ri tter:
me.
RF,/hr
c.c. Annette Brand
Si ncerely,
6r//b
Ray'Baldwin
Planninq Di rector
If I can be of any future service, nlease feel free to contact
r-.\tr.LD r ! u
DePartnrent oT Lotol Affairs
Colorado Division of Planning
PhiliP H- Schmuck' Director
DATE: . rebru ^ry..28, 1977
SUBJECI: .\ION.ST.{TE ASSISTA}ICE
CorYn'eBt's received frou:
USDA Soil Conser"atios Sef i'3e
Colorado DePartmenu of Eealth
coro'"Iliiu."Planuingand-Budgeting
Cofot"io Division of Wat'er Resources
Colorado WaEer Consewat'ion Board
Colorado Geological' SunreY
Colorado Divislon of ?lanning
fne
EO:
SIGI{OFF LETTER
TO:TOI,IN OT SILT
AtEs: Vern Hollen
as a resuLt, it has been deEertised that:
araor2Ers and objec.ives
y The p.roposed proJe:t i: in accord *t}-P1ans' Prograos and objectives
Geotbgical Surrrey and. .n" ,.n"t;;;t ti**l-"itn 'ii"tt shduld be considered'
;
sEate crearinghouse has reviewed the nouificarion and coenenEs Pert'alning
SILT SEI,IER SYSTEI{ E(PANSION A\ID I}IPROVEIENTS
-
The followiag should' be consldered:
(Acogy)(Coptes)ofcoutentsthatareaE'variance,,lithourposition
ii") - lare) attached
Accpyofthisfoorcust,!laltachedEoyourappl}.i.1:i-"-r.'subo!tEedtothe
fundlng aseocy ii-itilpefi"".ili*'il"-i"L" f onrarded a'teadv'
,.
SOC-4, Feb. 76
520 Stote Centenniol Building, l3l3 Sherr''on Strect' Denver' Colorodc 80203 (303) 892-2351
Stace 1'D '
Richard D' Lanrn' Goveroor
No: 7 7-502.300-004
ffi^ring,houseiiiiir-*' Schnuck' Director
N9 10158
... .. , r€fit€,t rlr) ''ffi
=.ffi::rH":=j,.mi5Jdgn'fil-d'ffig#
! aa,g' dilr" il th' ddiF l4cr-
T;t*t- c tht tct-d Er'
=;r.- -rd ' 'E' t"r'
Z7*-'EFdE'Cl-=''-'-:;
.d-dEt'''t'ttt#
PR@F OF PUBLICATION
GLENWOOD POS.T
STATE OF COLORADO' \ "..
COUNTY OF GARFIELD',
,?eie;......i...""'i-t''+'g'f"f'9'f"""""""""'dosolemolvt. ..................'
swear that I am """"'3e$er3}""Manai1'or:'
of
'the
f.tm:uf g.'{lffi .:,",{fu ,fl$ilf fl ,i{yffiEi:t'l[":'lif !:':[H*lJ.li,ii'l':I$iesarnoticeoradve*rse-
[1li5i*$:#',xlfruil++it.;$:,,1m
vertisements wltnln
Colorado.
rhatthe*",".9{,J;sl,r,,lj3i?"?#11,T'i:?11":if ;J'}$l'J#tl?
the rcgular and entrl
ilLffi x"S,"j",al;ia*$xi*#hyi::1":TiUil'i*:i"J:T'fl'i:r
...$*'y...].i""""""""""A'D " ts"7'9""' and the last publication of said
notice was is the issuc of said newspaper dated """""""""""""'-LD"
19...........-
In witness whcreof I have herctrnto set my haod tbis
day ot ...------.--*Y"' -* A"l "
Subscribcd -ii*Ii;"-u"r"tt -"q u notttv public
1'f t.*ilffi;;.;ta'" or cororado' ":: ;:*tt..h"""""*'
dav
3eoeral itrrrnager for dre
NotarY Public(SEAL)
o
of
My Coomissim ExPircs
AD,
EXITIBIT F
In accordaoce ntrb the Notlce of PubIlc Eearlng publlehed t{ay Il' 1979' 1o
the Gleowood Post, t,he hearlng on sasteldater treatsent facllltles for the town
of sllt was held on June 11, LgTg at 7:00 p.m. Persoae 1o atteudance were!
Lucy ClaYPooI
Davld C. l'[oore
James Kltson
Ray Scherar
Betty Savage
Roy Savage
8111 Swanson
Ed Feld
l'lellssa Lauberton
I,
Leroy E. Tobler
Charles t'1. Rltter
A transcrlpt of the presentat'ion glven by the
their anslrers Eo varlous questions may be obtained
consulElng englneers and
fron cheir offlce'
Veruon L. Eolleu
Hanuel L. Dlaz
Gerald A. Parker
Reda Moore
Tou Medearls
Glenu l'{cKanna
AnneEte Brand
Peter KernkamP
EIsa Pyles
Celo B. Schultz
!,label Ann Fazzi
Dlscussl0n centered around the revislons made to Ehe study since the PubIlc
Hearlng held ln AugusE 1978. The najor change is the e'ergence of AlEeroative 2
as the recounesded alterna.lve
-ol ararr crrr cpulatlon growth'
Also, addltiooal lnformation on related subjects such as pt
environmental condltions, the Kruger Subdivislon, and on-s'iEe dlsposal systens
has been collected and analyzed. The service charges uade necessary by the con-
structlonofanewtreatnentplantwerespelledoutindetall'')
The englneers were asked to cotr,oent on how much growth shout/be allowed
with the present wastewaEer disposal systen' They also anawered quesClons about'
the rlme schedule required for coropletlng construction of a tr:v treat'EenE plant'
./
some cltlzens volced concern abouE provldlng service to the Kruger subdlvi-
sion, and not recelvlng jusE coopensaElon for the resulting reductlon ln the
townt s growth capacity. However, iE was pointed out thaE by including the sub-
dlvlsion ln the Facility PIan, SlIt galned an extra 40 points and noved uP con-
slderably on the slatets priorlty fundlng llst' IleIlssa LaEberton fron EPA
noted that a forual agreetrent between the town and Kruger would have to be worked
out prlor !o constructlon of the proposed facllttles'
YI{EF€AS, the To,,m of silt has a dercnstlated need for LsrovgEnt
arrdaddltlona}waetevatcrtreatrentfaclllttee;ard
. uI{EREA5, the Envtronrrcntal protectlon AgctElr has rade avallablc
to quallfytng local rrnlclpallttect grnts to Pay fot 7SA of thc cost of
the facllltlesl and
ldHEREAs, the Totrn of SlIt ts atterrptt':ng to obtaln addltlonal
grantsfgrthe25%costtobebornebyth,elocalrcgriclpalltyduetothe
flscal *tlure of the Tonn of Sl1t;
. BE I! RESOI,VED:
THA? the ?ot^ of Silt shall i-nplerurt the pendinq EPA scctlon 201
(
st'dy at such ti.rre as the strrdy tras been addeqted arrd approned by the EPA
and aII other state and federal regulatory agenclesr pr^ovidedr that the
t
forrr of sllt is able to obtatn natchl-ng grants or fimds other ttran
rnrnlclSnl funds e.:ual to the 25a of cost of the waste vater treatnrent
facllltles.
PassedandadoptedbytheBoardofTnrsteesoftheToyrrofsl].t'
th1s 11th daY of Jture, 1979.
\TEFTICN L. HOT.LEI{
t,
AffESE:
}E[EN E. Pll[,ES
}IAYOR
fffio,eFt(
STATE OP CCTORADO I u,
;
Cd,}flT OF GARETE.D )/
I,P.elerrE.Qrles,Cler.koftheTorrrofsl]'t'doherebrycertlfy
the fone,"gtollg to bc a trtre and coaplete copy of a resolutlon passcd and
adoptcd at a regular uetlng of the Boad of Trr.rstees on &:ne 77r 7979'
i{ttness uy hand and the ceal of cald ToIn thrs 6th day of Jfrlyt
7979.
&**; tQ,,*
I€h,N CLERK(5EAL)
EXHIBIT H
RESOLUTION
'JElgRDtS, the U. S. .SolI Conserration Serrlce ilcludes 1n lts definition of
prirne farrnland nareas that cu:renti.y are irri-c'ated or hsve nroper drainage to
provtcJe the necessary water reqime to meet the crlteriarrr and
1rl.r{51,EASr-sueh rand exlsts r.r'ithin the planning area for T-,nn of Silt and ls
eurrently under cul+.ivatton; and
'./HiA,EiS, t:e Torrn nf Sj-1t is auare oJ' and
E:'rironrnontal Protcction Agenc.'/ to recognize
value of agrie'rr.t.ural. lands and tl:e necessity
are irmact,eC bY SA nrograns;
BE IT TF.fJFORE RESoLVED that the Boarc of Tmstees bf Totm of silt hereby
a.dopts a oollcir statereent rhich acknorledges the need to preserve orime agricultural
land and hereby conrr:rrnicates this policy t.o the Planning and Zoning C'cnrnission fcr
its use in eontinue{ develooment of the '!'otTtrs cornorehensive nlan;
ll? i? :;lIRTllil, il'..:.:i',Lv.m thal lhe T^wn of silt wll1 reeor,rnr:nd thaL noil ciov€I0nment
be l_ocaLad il areas r.:nich clo nob involvp nrl-ne a.sriell',ural 1and, phile aL +-he same
tlme recngnlzlnq the ri.gtrts of r',rivate land hol.ders and statrng lts intenslon so
relrarn lr'^n 1ilr'ru':nI On t,nose r:f1!s.
in agrearrent :'rith the Polic;; of
the food prodrrction and environnental
to nrotect such lands whenever thery
Anphibians and n"Ptite..
The
exlsE 1n
H(T{IBIT I
followlug tables sunmarlze the dlfferent flora and fauna whlch olght
or around Silr. Endangered species are denoted by an asterlsk'
Uncul tlvated Vegetatlon
Aspen
Plnlon JuniPer
Grass
Sagebrush
Sprlng Larkspur
Locoweed
Orange Sneezeweed
Lupine
Hounds Tongue
l,iarnmal S
Etk
MuIe Deer
llountaltr Lion
Cottontail Rabbit
Coyote
Red Fox
Pocket Gopher
Least ChlPounk
Shrew (4 Species)
Plpistrelle
vole (5 Specles)
Plne Squirrel
Snow Shoe Hare
Beaver
Mink
Riirail
l{ebsel
tluskrat
YeI lorhaired PorcuPine
I.lounEaln Shrub
Grease Weed
Ganbel Oak
Halogeton
Snakeweed
Whorled Mllkweed
Canada Thistle
SoI tbush*Chafferbox Orchid
't,
Gray Fox
Raccoon
Badger
Spotted Skunk
Strlped Skunk
Northern Skunk
Rock Squirrel
Bobcac
Jack Rabbit
Maroot
Prairie Dog
Ground Squirrel
Colorado ChlPnunk
SoY ChtPrnunk
Bat (6 Species)
l.louse (75 SPecies)
Rat (25 SPqcles)
Plne Martlri
Brown Bea.t /
i
whiptall (2 SPecies)
Corn Snake
MlIk Snake
Desert Snake
BuII Snake
I"lestern Rat E Iesnake
Frog (3 SPecles)
Llzard (8 Species)
YelIow-bellled Racer
Spotted Nlght Snake
Whlpsnake
Greensnake
GarEer Snake (3 Species)
Salamander
Toad (4 Specles)
a
I
I
I
I
I
I
I
II
F
t
t
t
t
t
hIIt
Sand Shlner
Colorado Rlver ScalPln
Channel Catflsh
Utah Chub
Roundtall Chub
*tlumPback Chub
rColorado Squawflsh
Speckled Clace
Fathead Hlnnow
Carp
Red Shlner
Brown Trout
Brook Trout
Boneytall Chub
Canada Goose
MaI I ard
Gadwal I
Plntal I
Teal (35 SPecies)
Anerican Wigon
Northern Shoveler
Redhead Duck
Lesser ScauP
SandhiIl Crane
SandplPer
Nlghrhawk
Klngf lsher
FI lcker
Sapsucker (25 SPecies)
Flycatcher (7-' SPecies)
Peer.ree ij
Swallow (65 SPecies)
Junco
Hawk (75 SPecies)
Horned Owl
Wren (5 SPecles)
Robin
Thrush (35 SPecles)
tlagP ie
Crow
Ti tmouse
Bushtl t
Common GoIden EYe
RuddY Duck
Comrnon l'{erganser
Anerican Coot,
SnlPe
Grouse
Pheasant
llountalu Whlteflsh
Ralnbow Trout
llountalo Sucker
Flanneloouth Sucker
Bluehead Sucker
Hunpback Sucker
Western White Sucker
Rlo Grande KllI Fleh
Largemouth Bass
Green Sunflsh
Blueglll
CutthroaE Trout
B[ack BuIIhead
Birds
Horning Dove
Blue Heron
iKl l I deer
Poor-Wl I I
Swlft
*r,-ii"g Bird (5 SPecies)
wooap"It"r (3 SPecies)
KlngI et
StarI ing
Vireo
Meadowlark
Cowbird
Tanager
Kingbird
Pheobe
Lark
Jay (4 SPecies)
Raven
Nutcracker
Chlckadee )
Nuthatch
Dipper /
Sage Thresher
VeerY c
si".tr.a (3 sPecies)
Gnac Catcher
warbt/er (8 SPecies)
Soarrow (15 SPecies)
siackbrrd (3 SPecies)
Orlol e
Grosbeak
Flnch (6 SPecles)
Buntlng
Towhee
VuI Eure
Fl sh
Chukar
Snowy Egret
Anerlcaa BitterD
Whtte-faced Ibls
Nlght Heron
Canvaeback
Buf f I ehead
Anerican Avocet
Wllsout s PhalaroPe
Forstenr s Tern
Screech Owl
ShorE-eared Owl
Water Plplt
Cedar Wa:<wlng
Boheuian Wa:<nlng
Plne Slskin
YeI I owchroat
Golden Eagle
Bald EAgle
Long-bllled CurIew
Virginla RalI
YelIow Rall
Wl11et
Lesser Yellow Legs
Long:billed Dowltcher
Callfornla Gu lI
Longspur
Catblrd
Townsendt s Solltaire
Loggenhead Shrike
Ovenbird
GrackI e
Goldfinch
-
EXHIBIT G
Evidence that the proposed site and facility operations will not be adversely effected by
floodplain or other natural hazards. Where such hazards are identified at the selected site, the
report shall describe means of mitigating the hazard.
Attached is a map showing the proposed site overlain with the floodway line. All
f acilities will be maintained out of the f loodway line. The plant is located within the 1OO-year
floodplain. All finished floors will be maintained one foot above the 1OO-year floodplain. The
plant will be designed with hydraulic grade lines above the 1OO-year f loodplain elevation so
water will not back up into the plant due to a flood condition. The facility will be designed
so high water will not adversely impact the operation of the treatment facility.
Also attached is a Phase/Environmental audit that discusses historical use, physical
setting, photographs, regional groundwater conditions and other information about this site.
LOMrI€c\Oo-1 26.exh
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A INTR.DUCTI.N AND SC.PE oF SERVICE
2.0
3.0
SITE DESCRIPTION
RECORDS REVIEW
3.1 Historical Use Information . .
3. 1. 1 ownership Information and Historicar Interviews
3.1.2 Review of Aerial photographs
3.1.3 Historical Summary
3.2 Physical Setting Information
3.2.1 Topography
3.2.2 Soil Conditions
3.2.3 Site Geology . .
3.2.4 Regional Groundwater Conditions3.3 Regulatory Review
SITE INVESTIGATION
4.1 Site Observations
4.t.L Currenr Use of the Site
4.1.2 Description of Specific Site Fearures
TABLE OF CONTENTS
1
1
1
2
3
J
J
4
4
4
4
5
5
6
6
7
4.0
a
0., Adjoining Property Observations
5.0 CONCLUSIONS
6.0 RECOMMENDATIONS
7.0 TERMS AND CONDITIONS OF ASSESSMENT
FIGIJRES
Figurel-SiteMap
Figure2-VicinityMap
ATTACHMENTS
Photographs
EDR Report
7
8
Mr' Scott indicated that he had not observed any evidence of spillirelease events involving
Q:l:'m"l'lfi:r*T.:iiifi l'fl :,-i:ff :,,i:"mrHffi J;:,1ffii,:1x,.H:,t.,,H.
or buried material. Mr. Scott indicated that he had no knowledge of pending-, rhrearenedl o1. purtlitigation. administrative proceedings or govemmental violation noii.., ,.l.urnt to hazardous
substances or petroleum products in, on, or from the Site.
WEI reviewed a series of Warranty and Quit Claim Deeds supplied by Mr. Craig Ohlson, TownManager, with the Town of Silt. Additional records were reviewed at the Garfield CounryAssessor's office in Glenwood Springs. Based on WEI's review of this information, the SitL
was purchased by Mr' and Mrs. Thomas Scott from Mr. and Mrs. Heinz Beer on July 31, 1992
as recorded in Book 840, page 616. Mr. and Mrs. Heinz Beer purchased the Site from paul A.andKerstinS. Begovak onoctober 23,lggl as recorded inBobt g16, page 12g. paul A. andKerstin S. Begovak purchased the Site from Clyde H. and Lucy J. Sieveis on November 19,
1986 as recorded in Book 699, page 474. Clyde H. and Lucy J. Sievers purchased the Site fromUnion oil Company as recorded in Book 645, page 940 prior to 1986. Information regarding
Site transactions prior to 1985 were not readily available. wEI understands that a formal titlesearch has been ordered for the Site. WEI recommends a review of this document beperformed to identify Site ownership prior to 19g6.
with the exception of the union oil Company, the ownership information as discussed abovedid not reveal previous owners of the Site whose company title suggests activities possibly
cT,[.i,'#T#:.}.ii.1'ffi :::lli;::.3ffi ,$fj'1"?ri,ij,ffi:1;{::::::;,fr.,:':',:",#
or disposal.
Mr. Scott stated that he was not aware that the Site was previously owned by the Union OilCompany. Mr. Scott added that to the best of his knowledge the Siie had not 6een historically
used for natural gas or oil production.
Mr. Frank Rupp, Police Chief for the Town of Silt since 1983, was interviewed by WEI onMarch 2, 2000. Mr. Rupp stated that to the best of his knowledge there were no reported
incidents regarding spill/release events or emergency responses involving hazardous materialsor petroleum products in the vicinity of or at the Site. Mr. Rupp stated
-that vehicle fires may
have occurred along Interstate 70, but added that any use of foam fire suppressant would have
been limited to the Interstate 70 corridor
3.1.2 Review of Aerial photoeraphs
Reasonably available aerial photographs depicting developmenr of the Site were obtained fromSilt Town Hall and from WEI's office in Glenwood Springs. The photographs were reviewed
to aid in establishing prior land use and to provide visual eriderrce of pmt u.iiriti., which mayhave involved storage or spill/release events of petroleum hydrocarbons and/or potentially
hazardous materials. original copies of the photographs were not available for duplication. A
(Unnuv of our findings is as follows:
AERIAL PHOTOGRAPH SLINTMARY
The Site is not deveroped. The Site appears to be more heavily wooded andvegetated than wEI's observationmio. during the Site reconnaissance.The. scale of the photograph is too small to make further observations. Theviking Traiier Park laundry and carwash are nor present. Interstate 70 hasbeen completed to the Silt interchange.
The Site is adjoined- to the norttr by Inters*te 70 which has now beencompleted west of Silt. No additional changes from the 1972 photo wereobserved.
The Site appears to be undeveloped, with the exceprion of the Sitet trtreesheds and access road. The rocition of these Site itructures is consistent
quantities of tireMiscussed in section 4.1.2 were not observed.
with observations made by wEI personnel during the site reconnaissance.
fdjacent properry east of the site appears to be occupied by the vikingTrailer Park including a laundry and^carwash. rne site is adjoined to the
::,:*,:,:::,..T^tl*:.9_"]:fo"^ Riyer. Evidence or oeuris pites and large
3.1.3 Historical Summarv
Revi-ew of aerial photographs indicate development of the sire, since lg7z, has been limited tothe three sheds and access road. Properry adjacent to the Site to the east consisring of a trailerpark' laundry, and canvash was developeo piior to 1978. The Site's development information
!:n}]"t
from the review of aerial photographs is consistent with information supptied by Mr.
3.2 Physical Settine Information
3.2.1 Toooeraphy
The 1962 (photorevised 1987) 7'5 minute.uscs Topographic euadrangle Map (Figure 2) ofSilt' colorado indicates the Site elevation is approxiriat"ery s,+oo feet. -Ttre
map indicates theSite is undeveloped' Evidence of either the sit;t shed-oi....r, road are not indicated. Surfacewater resulting from storm events or snowmelt would generally flow to the south towards thecolorado River which borders the site to the south. ThI totat difference in elevation across theSite is estimated to be less than 20 feet.
3.2.2 Soil Conditionso
According to the U.S. Department of Agriculnrre (USDA) .loil Survey of the Rifle Area,Colorado, the Site are comprised of sand and silt overlying sand gravel and cobbles.
3.2.3 Site Geotogy
According to the Geologic Map of Colorado, prepared by Ogden Tweto in 1979, the bedrockgeology of the Site consists of modern alluvium including Piney Creek alluvium and younger
deposits.
3.2.4 Reeional Groundwater Conditions
Groundwater was not measured during the Site reconnaissance. Based on observations made atthe Site during our reconnaissance and the Site topography, groundwater may be found at
elevations close to that of the Colorado River or less-thin approximately 20 feet below theelevation of the Site.
3.3 Regulatory Review
The purpose of the records review is to obtain and review reasonably ascertainable records thatwill help identify recognized environmental conditions in connecrion with the Site. For this
e,ix;,ffi :'h.3ifi -'.:?tri,:ffi ,ff :'J:##r:,Tr,*.#:rces(EDR)of southpor,,
Our investigation included, but was not limited to, a review of the following lists prepared and
maintained by environmental regulatory agencies for the area around the subject site. The most
recent list update completed by the respective agency in control is identified in the followingsection. These lists were searched for entries up to a mile radius of the Site.
Underground Storage Tank (UST) list, October 12,1999 from the Colorado Deparrmentof Labor and Employment, Oil Inspection Section.
I-eaking Underground Storage Tank (LUST) list, December IZ,lggg from the Colorado
Department of Public Health and Environment (CDPHE).
o Comprehensive Environmental Response Compensation and Liability Information
System (CERCLIS), August 26, l99g list from the Environmenral protection Agency(EPA).
o Resource Conservation and Recovery Information System (RCRIS) Generators list,
September 1, 1999.
e National Priorities List (NpL) sites, colorado, July 22, lggg.
4
. RCRIS Treatment. Storage and Disposai Site list, september i, 1999.
A review of the above records from the repon and other sources of information identified thefollowing environmental records within appropriate minimum search distances of the Site.
One LUST facility identified as Paul's Mechanic Shop is located at242West Main Street, Silt,Colorado. Based on the inferred groundwater gradient, this facility would be cross-gradient ofthe Site.
Other LUST and UST facilities are included in the EDR report, but are located outside theminimum search distance of the Site.
A review of the above records from the EDR report revealed no other pertinent environmental
records within appropriate search distances of the Site.
The EDR report also includes an Orphan Summary of un-mappable enrries (page i1). Theseorphan Summary entries are not expected to be witirin the appropriate minimum search distanceof the Site, or based on the inferred groundwater gradient, would be considered cross-gradientof the Site.
Mr. Craig Ohlson, Town Manager for the Town of Silt, was interviewed by WEI of February
l'.'iL,"f,x"#f.,ff Lffi :I;:XT,:;'il1'i:ff tr:l',:il-.".111,TT:,:;y,!f#1:1
managing wastewater. Mr. Ohlson added that the Viking Trailer park had been underenforcement actions from the Colorado Deparrnent of Public Health and Environment (cDpHE)
regarding compliance issues involving the ISDS. Mr. Ohlson located the ISDS on a map. Based
on the inferred groundwater gradient, the location of the ISDS would be cross-gradient of theSite. Mr. Ohlson added that the laundry and carwash were connected to the Town of Silt,s
wastewater treatment plant.
The Town of Silt's wastewater treatment plant is located approximately 2000 feet easr of the Sitealong the north side of the Colorado River. The facility-has received citations and fines fromthe CDPHE regarding compliance issues. Based on tire inferred groundwarer gradient, thisfacility would be cross-gradient of the Site.
4.0 SITEII\TVESTIGATION
4,L Site Observations
The Site and adjoining properties were visually observed on February L7,2000 by WEI
personnel.
5
4.1.1 Current Use of the Site
Et the time of our reconnaissance, the Site's development was limited to three sheds and anaccess road' Since 1992, the Site has been leased to pasture horses. The Site is also used tostore a variery of equipment.
4.1.2
At the time of our reconnaissance, the Site development was limited to three strucnrres. Thestrucnlres included approximate 80, 96, and 160 square-foot, wood-frame sheds with comrgatedmetal roofs. The first two sheds were skid-mounted and did not have foundations. The thirdshed has a foundation. At the time of our reconnaissance, the sheds were in very poorcondition. A variety of materials including, but not limited to, electrical conduit, lumber,electrical junction boxes, sono-tube, windows, screens, PVC pipe, aluminum door frames, angleiron, two bath tubs, iron pipe, two axles, tires, wire mesh, 4i4 post, empty pail, a bicycle. indan empty 55-gallon drum were located inside or adjacent to the sheds.
The Site includes a series of ditches. The main ditch flows north to sourh and is located parailelto and east of the Site's access road. Approximately 1,000 neatly stacked tires were observedin the ditch at this location. At the time of our Site riconnaissance, surface water from the ditchappeared to have ponded at the Site's northeast corner. An additional ditch was located alongthe Site's north boundary at the toe of Interstate 70's earth embankment. WEI observed
cIffi :',ilL::3i[":J:::',:f i,,]:,'ffi ,H3;:Tfi "H,'.lt.H'.#:::ffi il.;..ffi
,l:
was in the process of removing the tires from the Sit.'. ditch located at the northeast corner.
Two empfy 55-gallon.drums, two pallets, and approximately six tires were observed in anadditional ditch located at the southeast corner of the eastern portion of the Site. Mr. Sconcommented that this pafticular location was located off-Site.
WEI observed approximately 140 cubic-yards of debris located in three separare stockpiles. Atthe time of our reconnaissance, the piles appeared to contain primarily brush, wood, cardboard,tires, comrgated metal roofing, a garden hose, a chair, pallets, and fencing material. Mr. Scottindicated he had routinely cleared the Site of brush and debris every sprin! since he owned theSite' Mr. Scott added that the debris piles did not contain petroleum hydrocarbons or potentially
hazardous material.
WEI observed a total of 400 cubic-yards of soil which appeared ro have been end-dumped into
separate piles from a dump truck. At the time of our i."o*issance, evidence of petroleum
hydrocarbons or potentially hazardous material was not observed. Mr. Scott indicated thatmaterial originated from excavation activities associated with the construction of the carwashfacility located north of the viking Trailer Park. wEI observed an approximare 4 cubic-yardstock pile of coal. Mr- Scott indicated that the material had been importeo ro the Site and wasintended to be used as furnace fuel.
6
The Site was also used to store a variety of equipment inciuding a hay rake, horse trailer, a
]Uit. roofing material heater, hay bailer, barbecue grill. trailer, hay mower, flat-bed truck,Slngle-axle dump truck. and an empty fuel tank. Mr. Scott indicated that the tank had been usedto store water used for dust suppression along the roads of the Viking Trailer park.
The Site did not appear to include underground or overhead utilities. No pad-mounted of pole-
mounted transformers were observed.
Evidence of storage or spillirelease events inrrolving petroleum hydrocarbons or potentially
hazardous material was not observed during wEI's siti r..o*"issance. No chemical odors,
sumps, or pits were identified during the Site investigation. No release of potentially hazardous
substances associated with the Site were visually identified during the ieconnaissance. Nochemical odors were detected around or near the Site suggesting a release or recognizedenvironmental condition. No drums or containers containinf pot ntiutty hazardous mate-rial(s)or petroleum hydrocarbons were identified during the Site investigation. Evidence of buriedmaterial was not observed during our reconnaissance. wEI did not observe evidence that theSite had been used for oil or gas production.
4.2 Adioinins pronerty Obseryations
Adjoining properties were visually examined from public access right-of-ways to make a cursory
assessment of the current land use and its potential for recognized envirtnmental conditions
o;i"T,?,'lJ,i.'l,Tri-"?.HT::,il'"'JH1T'1T;f iTrH,lil!.fi ::T:*$ffi :properties that were legally accessible. The Site is adjoined to the north ind-west by Inierstate70. The Colorado River adjoins the Site to the south. The Viking Trailer park which includes
a laundry and carwash borders the Site to the west.
5.0 CONCLUSIONS
Based on the assessment and the data obtained to date, the ESA has provided no evidence of
recognized environmental conditions existing at the Site. A recognized environmental condition
is a release of petroleum hydrocarbons or potentially hazardous material to the environment insufficient quantity to cause risk to human health o. .n enforcement action by a regulatory
agency.
our observations at the Site found no factors to indicate substantial releases of hazardous wasteand/or petroleum hydrocarbons have occurred. However, the debris piles and tires represent
a potential recognized environmental condition. The potential exists for the debris piles and tiresor the soil below the tile-s to contain petroleum hydrocarbons or potentially hazardous material.
The only way to establish if extensive releases have occurred is to conduci sampling and testingin and below the piles. We do not believe this is warranted. However, the owner must accept
the financial risk that releases may have occurred if the properry is purchased without furthertesting. The solid waste and tire piles represent a potentiaily ixpinsivi solid waste removal and
Josal issue should the marerials be removed and properiy disposed.
6.0 RECOMMENDATIONS
t ...o.-ends that the debris piies and tires be removed from the Site and properly disposed
as a condition of the proposed Site transaction. WEI suggests that an additional Site visit be
made to evaluate the Site for evidence of potential surface stains associated with the debris piles
and tires. If hazardous and petroleum releases are encountered. the costs to remove and.
properly dispose of affected material should be made a part of the transaction.
7.0 TERMS AI{D CONDITIONS OF ASSESSMENT
This assessment is based on the information available to WEI at the time of the investigation and
provides an indication of the status of the Site at that time. The opinions expressed concerning
the environmental risks or migration of contaminants are based on the data in the report.
Additional data could change the opinions expressed.
The goal of the processes established by the ASTM pracrice is to identify recognized
environmental conditions. The term "recognized environmental conditions" means the presence
or likely presence of any hazardous substances or petroleum products on a property under
conditions that indicate an existing release, a past release, or a material threat of a release of any
hazardous substances or petroleum products into structures on the properry or into the ground,
groundwater, or surface water of the property. The term is not intended to include de minimis
cSfitions that generally do not present a material risk of harm to public health or rhe
ilonment and that generally would not be the subject of an enforcement action if brought to
the affention of appropriate governmental agencies. This process is designed such that
completion of the process, as described in this report, should constitute all appropriate inquiry
into the Site and uses of the Site to qualify for the innocent landowner defense to Comprehensive
Environmental Response, Compensation and Liabiliry Act (CERCLA) liability.
A complete definition of the Site conditions would require substantial testing and a more detailed
investigation. Future conditions may change, and funher investigation should be completed if
contamination is suspected or if Site conditions substantially change. Because of uncertainties
related to subsurface conditions and the changing nature of Site conditions, it is not possible for
WEI to provide guarantees with this assessment.
This ESA did not include any inquiry with respect to radon, methane, asbestos containing
materials, lead-based paint, lead in drinking water, formaldehyde, endangered species, wetlands,
subsurface investigation activities or other services or potential conditions or features not
specifically identified and discussed herein. In those instances where additional services or
service enhancements are included in the report as requested or authorized by the client, specific
limitations attendant to those services are presented in the text of the report.
8
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PHOTOGRAPHIC LOG
Town of Silt - Proposed Wastewater Treatment plant Site
View of eastern Site boundary
View of Site looking west
WASTE ENGINEERING, INC.
818 Golorado Ave., p.O. Box 219
Glenwood Springs, CO 81602
(970)94s-77s5
Job No. 002-014
PHOTOGRAPHIC LOG
Town of Silt - Proposed Wastewater Treatment ptant Site
Ponded surface water on eastern portion of Site
View of Site looking west
WASTE ENGII\EERING, INC.
818 Colorado Ave., p.O. Box 219
Glenwood Springs, CO g1602
(e70)945.77s5
PHOTOGRAPHIC LOG
Town of Silt - Proposed Wastewater Treatment Plant Site
Suspect flood channel
:ta-.=x
,'--#;':llii-i
Three Site structures (sheds)
WASTE ENGIIYEERING, INC.
818 Colorado Ave., p.O. Box 219
Glenwood Springs, CO 81602
(s70)945-77s5
PHOTOGRAPHIC LOG
Town of Silt -Wastewater Treatment Plant Site
Empty S5-gallon drum located behind the sheds
Additional material stored behind the sheds
WASTE ENGINEERING, INC.
818 Colorado Ave., p.O. Box 21g
Glenwood Springs, CO 91602
(e70)945-775s
PHOTOGRAPHIC LOG
Town of Silt -Wastewater Treatment Plant Site
Empty S5-gallon drums, tires, and pallets
Tires located in ditch
WASTE ENGINEERING, INC.
818 Colorado Ave., p.O. Box 219
Glenwood Springs, CO gl602
(970)945-77ss
PHOTOGRAPHIC LOG
Town of Silt - Proposed Wastewater Treatment ptant Site
Refuse pile
Lumber and firewood
WASTE ENGINEERING, INC.
818 Colorado Ave., p.O. Box 219
Glenwood Springs, CO 91602
(970)945-775s
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PHOTOGRAPHIC LOG
Town of Silt - Proposed Wastewater Treatment plant Site
Machinery
Utility poles
WASTE ENGII\IEERING, INC.
818 Colorado Ave., p.O. Box 219
Glenwood Springs, CO gi602
(970)945-7755
-)i*F;r
-"t3 ,
PHOTOGRAPHIC LOG
Town of Silt -Wastewater Treatment ptant Site
Access road
Refuse pile
WASTE ENGINEERING, INC.
818 Golorado Ave., p.O. Box 219
Glenwood Springs, CO 91602
(970)s45-77s5
t-*
t,. -
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PHOTOGRAPHIG LOG
Town of Silt -Proposed Wastewater Treatment plant Site
Viking Trailer Park located on adjacent property to the east of the Site
WASTE ENGINEERING, INC.
818 Golorado Ave., p.O. Box 21g
Glenwood Springs, CO 91602
(s70)s4s-7755
s"a€iqj.
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Ihe EDR-Radius Map
with GeoCheck@
roposed WWTP Site - Town of Silt
S. Frontage Road
silt, co 81652
Inquiry Num ber: 462375.1s
February 11,2000
'! Enuironmental
: Data
!Resources, lnc.
i anaedr-company
The Source
For Environmental
Risk Management
Data
3530 Post Road
Southport, Connecticut 06490
Nationwide Customer Service
Telephone: 1 -800-3S2-OO5OFax: 1-BOO-291-6902lnternet: www.edrnet.com
{
i
TABLE OF CONTENTS
cutive Summary_ _
PAGE
ESl
A1
A9
ographic Map-
Check Summary-
rview Map-
ilMap-
Summary-
ran Summary_
ENDICES
)heck Version 2.1
rnment Records searched / Data currency Tracking Addendum
11
Thank you lor your business.Htease.contact EDR at 1 _900-352_OOSO
with any questions or comments.
Dlsclaimer and Other lnformation
Thls Report Gontaln! inlormation obtained lrom a varaety ol public and other sourc€s and EnvironmentatDeta Resourcts' lnc' (EDR) makeg no rsprlontatlor of waranty regarding the accurEcy, reliabllity, quailty,suitabllity' or completenels o' said lnlormation or the inrormatr6" "iiuiiii in this ,eport The customershall asaume lull responsiblllty for the use ol thls report.
NO WARRANW OF MERCHANTABTUW OR OF FITNESS FOR A PARTICUI.AR PURPOSE, EXPRESSED ORIMPLIED' SHALL APPLY AND EDR sPEclFlcALLY olscutlas ine iieinc oF sucH wARRAlmEs. rN NoEvENT sHALL EDR BE LTABLE To ANyoNE FoR spE-ctAr_ rHcroeliiaf tirseouer,rnAL oR ExEMpLARy0AMAGES' coPYRlGHr (c) 1ee8 BY ENVIRoNMENTAL oara iEliiiinEeG, rnc. ALL RtGHrs BEsERvED.
**:m::: indicated, alltrademarks used herein are the property or Environmenrar Dara Resources,
TC462375.1s page 1
A search of available environmental records was conducted by Environmental Data Resources, lnc.(EDR)' The report meets the government recoros search requir;ments of ASTM standard practice forEnvironmental site Assessments, E 1s27-sr. a"-"-d';;#;;;::i; per ASTM srandard or customdistances requested by the user.
TARGET PROPERW ADDFESS
S. FRONTAGE BOAD
stLT, co 81652
TARGET PROPEHTY COORDINATES
Latitude (N9.{n): 39.S429OO - 39. 32, 34.4"Longitude (West): 107.664400 -ioiisg,'li.e,,Universal Tranverse Mercator Zone 13
lIM X (Meters): 2210g6.7
UTM Y (Meters): €80207.0
USGS TOPOGRAPHIC MAP ASSOCTATED W'r'I TARGET PROPER,Y
Target Property: 24g9107-E6 S|LT, COSource: USGS 7.5 min quad index
TARGET PROPERW SEARCH RESULTS
The target property was not risted in any of the databases searched by EDR.
\oupped sites were found in EDR's search of available ('ecords either on the target property or within the ASTM E)roperty for the following Databases: -
"re_lsonably ascertainable,,) govemment
1527-97 search radius around the target
:EDERAL ASTM STANDARD
,lpL:_--_--_-- -- National prioriv List)elastedNPL:----__-__ NpLDetetions')ERCLIS:-'-- -' comprehensive EnvironmentalResponse, compensation, and Liability lnformation
:ERC'NFRAP:-'------------- ffin"nsive EnvironmentatResponse, compensation, and Liabitity tnformation)oRRAcrS:. -- 3'o?I3Lr" Acrion FteporrtcRlS'TSD:-- - Resource conservation and Frecovery rnformation systemlcRrs'LoG:- -- Resource conservation il ii;;;;il inilrr"tion Svstemlc'tS'seG:- -- Resource conservation"nd R;;;;;; inilrm"tion system:RNS:_-__-_-- - Emergency nesponse trotifil;i;; S;il;
TATE ASN! STANOARD
HWS:------__ - State Haz. WasteWF/LF:------ - Solid Waste Sites & FacititiesOTRUST:--- - COTRUST
=DERAL
ASTM SUPPLEMENTAL
3f[. : : : :. - - -.. - :. - - : : : : B5;n"o (.ERCLA) consenr Decrees
TC462375.1s EXECUTIVE SUMMARY 1
EXECUTIVE:SUMMARY
Q#,88,..-- -. -.---- ".
[i:.|fiili"&1;;'"i3ll,1'*y,rffT,3;:1;l,'g)sl;
prosram.,,,"*"*
NPL Lien:--- --- NpL Liens
31?i:;__-_- _- tgp lcJiyity Darabase systemf33rr,..-_. ..- n^-nn aJ#Nli,iffiffiia"r,ing system
TSCA:____--_ --. Toxic SuUstances Control Act
STATE OR LOCAL ASTM SUPPLEMENTAL
HLs!. LF:----- __ HistoricatLF
4!Ti--,.r--- --- Abovegrouno Tank UstCO ERNS:-- -_- ERNS-
Meth Slte:--- --. Methane SiteMeth lnv:---- _-. Uetnane tnv.vcP:----'--' --- Voluntary cl""nup & Redevelopment Act Apptication Tracking Report
EDR PROPRIETARY DATABASES
Coal Gas:_-- --- Former Manulactured gas (Coal Gas) Sites.
Unmapped (orphan) sites are not considered in the loregoing analysis.
Elevations have been determined lrom the usGS l.degree Digital Elevation Modeland should be evaluatedo1;E:t 1:"r.T,3::"lB?='i:iifi:'ay*':,ri'[iilt",'Til,f"i]ffT;;:,1:"r#g:;1r,"#T,lI
includes a tolerance ol +/' 10 feet. Sites with_an-elevation eq;iiJor higher than the target propertyhave been differentiated below from sites with an elevation row-eiinin tne target property (by more than10 feet)' Page numbers and map identification numbers r.t.iio tnl L6'n n"oir. Map report where detaireddatia on individual siles can be ieviewed.
Sites lisled in bold ltalicsare in multiple dalabases.
STATE ASTM STANDARD
LUST: The Leaking u1!-e1sr9u1a. storage Tank lncident Reports contain an inventory of reported
ff5:?3,:||:',3[:,[1T::?TLank inciderits. rhe oiii .","';#',il oepartment oJ i"irt[;" Leakins
A review of the LUS-T-list, as provided by EDR, and dated o1/og/2ooo has revealed that there are 2LUST sires within approximately r mite oitne target pi;f;*: '"-'
EquaUHlgher Elevation
PAULS MECHANIC SHOP
REEDS AUTO SERVICE
Address
242W MAIN ST
905 MAIN ST
Dlst/ Dir Map tD
114 - 1tzN12.I ENE
Paga
Ifl1
A4
TC462375.1s EXECUTIVE SUMMARY 2
fr::.{i"}lii:ii$}i:,3.:ax?J"r:ffi":::"-""Tiif i:it?I8rff,;r",:t;;:,,rff:*st*Ti:i
A review of the UST list,.as pro-vided by EDR, and dated 1 o/'t 2/1 999 has reveated that there are 3 usrsites within approximatety 0.75 miles 6i tn" taiget property.
Eq uall1li g her Elevation
LETSONS SEBVICE
GO.FER FOODS OF SILT
REEDS AUTO SENVICE
Address
124 1ST ST
902 MAIN ST
905 MAIN ST
Dlst / Dir Map lD Page
1/4- 1/2NNE
1t2 - 1 ENE12.I ENE
o
10,t
2
A3
A4
TC462375.1s EXECUTIVE SUMMARY 3
] 'o
poor or inadequate address information, the forowing sites were not mapped:
Site Narne
DOUG WIGHT HEAVY EOUIPMENT FIFPAIA
GARFIELD COUNTY SHOP AT SiIr -' "'"
MASTER PETBOLEUM CO
I.7O TO SILT EXIT, N. TO MAIN BLVD,3/4 MILE TO LEFT BETWEEN
Database(s)
UST,LUST
LUST
UST,AST
ERNS
TC462375.1s EXECUTIVE SUMMARY 4
EXECUTIVE SUMMARY
TOPOGRAPHTC MAp - 46237s.1s - waste Engineeri
,,\"'n---tt'"
- T.',
I
.t
ry
-.pi6nter, RichEr 5 orgrcatar
aral Wall ln quadrant
r Wcll in quadrant
lic Water Supply Wall
IPEFITY: Proposed WWTP Stte - Town of Sllt
S. Frontage RoadZIP: Sllt CO 81652
39.5429 / 107.6644
qq$Igryt_ER: Waste Engineering, tnc.CQNTACT: Robin Ver5chneid-er -'
INQUIRY#: 462975.lsDATE: February11,2OO0 2:31 pm
35 TOPOGRAPHIC MAP ASSOCIATED Wrrt| THIS SITE
fe"oeenw cooRDrNArES
Latitude (North):
Longitude (West):
Univorsal Transverse Mercator:
UTM X (Moters):
UTM Y (Meters):
Target Property:
)LOGIC AGE IDET.ITIFTCANONT
Geologic Code:
Era:
System:
Series:
:K STRANGRAPH]C UNfi
MAP ID
Not Heported
GEOCHECK VERSION 2.1
SUMMARY
39.542900 - 39' 32' 34.4"
1 07.654it98 - 107. 39' 51.8"
Zone 1 3
271036.7
4380207.0
2439107-E6 S|LT, CO
Tec
Cenozoic
Tertiary
Eocene
Category: Continental Deposits
)UNDWATER FLOW INFORMANON
Gtoundwatef flow dlrection for a parlicular slte is_best determined by a qualilied environmental protessional usingslte*peciflc tocll dab. ll such data ts not neasonebly ascetainable, h r"y O" r"o"ory to rely on other sources ollnlbrmetlon' lncludlng t,ll data collected on nearty propentei,-riiliiJ g*rndwatarirow lniormatton (from d*paqulferc), or surlaoe topognphy.t
t::rui::,ffi :i,;ffi :iB,H':,,J:riJffi trHJi:iffi[ix["J""::tl:]..T,JJI:f :,.,^.:x,rJTiffi :iil,
DISTANCE DTRECTIONFROMTP FBOMTP
General Topographic Gradient at Target property: Gensral South
Generar Hydrogeorogic Gradient at Target property: No hycrrogeorogic data availabre.
:RAL DATABASE WELL INFORMATION
GENERAL DIRECTION
GROUNDWATEFI FLOW
WELL
QUADRANT
Eastem
Westem
WELL
QUADRANT
Nonhem
Eastem
Southem
Westem
1 - 2 Miles
>2 Miles
DISTANCE
FROM TP
0 - 1/8 Mile
114 - 112Mile
112 - 1 Mile
0 - 1/8 Mile
Not Reported
Not Reported
DEPTH TO
WATEB TABLE
68 ft.
40 ft.
DISTANCE
FROM TP LITHOLOGY
.E DATABASE WELL INFORMANON
'l8f iffig'Yd's[fi"""m"*H*iffffi,]iffissi?f"fiffisH,sffi.uscsDi,i,.,o..sd.oos-,,(res.]
CUIFLOWT htffim SFt6 ot ttyfr$
TC462375.1s Page B
GEOCHECK VERSION 2.1
SUMMARY
No
Uving Area - 1st Floor
Llving Area - 2nd Floor
Basement
Not Reported
Not Reported
7.150 pCYL
Not Reported
Noi Reported
0ol"
oh <4 pCUL o/" 4-20 qCVL
Not Reported
Not Reportsd
1000/"
%>20gC:rlL
Not Reported
Not Reported
07"
,to,=, suppLy sysrEM TNFoRMAnoN
earched by Nearest PWS.
rorE: PWS System rocation is not arways the same as weil rocation.
WS Name:ASGARD SUBD WTR SYSTEM
0225 CNTY RD 266
BTFLE il, CO 81652
rcation Relative to TP: 1/2 - 1 Mile East
WS currently has or has had maior violation(s) or enforcsment:
A RADON INFORMANON
EPA Radon Zonelor GARFIELD County: 1
Note: Zona 1 indoor average level > a p?ilL.
'. Zona 2 indoor average level >= 2 pCi/L and <= 4 pCI/L.
: Zone 3 indoor average levet < 2 pCi/L.
GABFIELD COUNTY, CO
Number of sites tested: 2
Ar6a Average Activity
TC462375.1s Page 4
ring, lnc.
1n
Power transmission lines
Oil & Gas pipelines
n/
N
I
N
N
Proporty
telovations highsr han
il to fie targst property
I elevations lower han
let property
rsitication Sibs (il requested)
rl Priority List Sites
sibs
PROPERTY:
Q.
Proposed WWTP Site . Town ot Silt
S. Frontage Road
sltr co 81652
39.9429 I 107.66,14
)
qqSIqL,l_ER: Waste Engineering, lnc.CQNTACT: Robln Verbchneidar -
INQUIRY#: 462375.ItDATE: February11,2000 2:ZBpm
)
E
u
2
F
I
I
I
l-.-.-MESA Rt)
OETAIL MAP - 462925.1s. Waste Engi
D rna l,t Ir4 uL.
Iations higher thanio targBt property
ations lower than:opeo
ation Sitss (if reque$ed)
rceptors
)rity ijst Sitss
'(D
Power tsansnission lines
Oil & Gas pipelines
N
N
Proposed WWTP Site - Town of Silt
S. Frontage Road
sitr co 816s2
39.5429 t107.6644
Q!$.fOMER: WasteEngineering, tnc.CONTACT: Robin Ver3chneid-erINQUIRY#: 462975.1sDATE: February11,2OO0 2:S0pm
I
N
o
Database
SearchTarget DistanceProperty (Mites)
FEDEBAL ASTM STANDARD
NPL
Delisted NPL
CERCLIS
CERC.NFRAP
CORRACTS
RCHIS.TSD
RCRIS Lg. Quan. Gen.
RCRIS Sm. Ouan. Gen.
ERNS
STATE ASTNN STANDARD
State Haz. Waste
State Landfill
LUST
CO TRUST
UST
FEDERAL ASTM SUPPLEMENTAL
STATE OR LOCAL ASTM SUPPLEMEI.ITAL
HistoricalLF
AST
CO ERNS
Methane Site
Methane lnv.
VCP
EDR PHOPRIETARY DATABASES
1.500
1.500
1.000
0.750
1.500
1.000
0.750
0.750
0.500
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
<1/8 1t8-1/4 1t4-1t2 1t2-1 >1
Total
Plotted
000000ONROONRO000ONROONROONHONRNRO
000ONRO1NR2ONRO2NR3
1.500
1.000
1.000
't.000
0.750
1.500
1.500
0.500
0.500
0.500
0.250
0.500
0.500
0.500
0.500
0.500
1.000
0.500
0.500
0.500
0.500
0.500
0
0
NR
NR
NR
NR
NR
NR
NR
NH
NR
0
0
1
0
1
0
0
0
0
0
0
0
0
0
0
CONSENTt
HMIRS
MLTS
MINES
NPL Liens
PADS
RMTS
TRIS
TSCA
Coal Gas
qQUIFLOW - see EDR GeoCheck aurr"r|'Uoo
TP = Target property
NH -- Not Flequested at this Search Distance
'O may be listed in more than one database
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
NR
0
0
0
0
0
0000NRONRO
NRONRONRO
NRONRONRO
NRO
ONRONRNRONRNRONRNRO
NRNBONRNRO
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
TC462375.1s page 1 of s
MAP FINDINGS SUMMARY
0
)lD
,ction
ance
ance (ft.)
'ation Sitea EDR lD Number
Database(s) EPA lD Number
coal Gas site Search: No site was found in a search or Rear property scan,s ENvrRoHAz database.
h
n
PAULS MECHANIC SHOP
242 W MAIN ST
stlT' co 81652
LUST sl02719236
N/A
u003t24803
N/A
er
LUST:
Facility lD:
Event lD:
Active:
13713
4570
Yes
LETSONS SEFVTCE
124 tST ST
PARACHUTE, CO 81635
UST:
Ownar Name:
Owner Address:
Dale lnstalled:
Material:
Construclion:
Tank Status:
Tank Capacity:
Tank Chemical:
Owner Name:
Owner Address:
Date lnstalled:
Matarial:
Construction:
Tank Status:
Tank Capacity:
Tank Chemical:
Owner Name:
Owner Address:
Dat€ lnstalled:
Material:
Construstion:
Tank Status:
Tank Capacity:
Tank Chemical:
GEORGE E LETSON
124 1ST ST
Not reported
Galvanized Steel
Asphalt Coated or Bare Steel
Permanently Out ot Use
3000
Gasoline
GEOBGE E LETSON
124 lST ST
Not reported
Galvanized Steel
Asphalt Coatsd or Bare Steet
Permanently Out ot Use
3000
Gasoline
GEORGE E LETSON
1241STST
Not reported
Galvanized Steel
Asphalt Coated or Bare Steel
Permanenfly Out of Use
3000
Gasoline
UST
t2
TC462375.1s Page 7
o
olD
3CtiOn
tance
lanc€ (ftfl EDR lD Number
Database(s) EpA lD Number
LETSONS SERVICE
Owner Name:
Owner Address:
Date lnstalled:
Matenal:
Construction:
Tank Status:
Tank Capacity;
Tank Chemical:
Owner Name:
Owner Acldross:
Date lnstailed:
Materiat:
Construction:
Tank Statusr
Tank Capacity:
Tank Chemical:
Owner Name:
Owner Address:
Date lnstall6d:
Mateial:
Construction:
Tank Stiatus:
Tank Capacig:
Tank Chemical:
i (Continued)
GEORGE E LETSON
124 1ST ST
Not reported
Galvanized Steel
Asphalt Coatecl or Bare Steel
Permanenty Out of Use
3000
Diesel
GEORGE E LETSON
124 lST ST
Not rcported
Galvanized Steel
Asphalt Coated or Bare Steel
Permanenfly Out of Use
3000
Diesel
GEORGE E LETSON
124 lST ST
Not reported
Galvanized Steel
Asphalt Coated or Bare Steel
Pemanenfly Out of Use
3000
Gasoline
u003't24803
u003124996
N/A
GGFER FOODS OF SILT
9O2 MAIN ST
stLT, co 816s2
UST:
Owner Name:
Owner Address:
Dats lnstalled:
Material:
Construction:
Tank Status:
Tank Capacity:
Tank Chemical:
Owner Name:
Owner Address:
Date lnstalled:
Matedal:
Construction:
Tank Status:
Tank Capacity:
fank Chemical:
MONUMENT OIL CO
703231t2RD
Not roport€d
Fiberglass Reinlorced plastic
Fiberglass Reinforced plastic
Cunently ln Use
4000
Gasoline
MONUMENT OIL CO
70323 1t2AD
Not rBported
Fiberglass Reinforced plastic
Fiberglass Reinforced plastic
Cunenfly ln Uss
4000
Gasoline
UST
TC462375.'ts Page I
Database(s)
EDR lD Number
EPA lD Number
GO-FEH FOODS OF SILT (Conrinued)
Owner Name: MONUMENT OIL CO
Owner Address: 103 23 1tZ RD
Date lnstalled: Not reportedMateriai: Fiberglass Beinforced plastic
Construction: FiberglassReinforcedplastic
fank Status: Cunenily ln Use
Tank Capacity: 12000
TankChemical: Gasoline
Owner Name: MONUMENT OIL CO
Owner Address: 708 23 1lZ RD
DatB lnstalled: Not reporteclMaterial: Fiberglass Reinforced plastic
Construction: FiberglassReinforcedplastic
Tank Stabs: Cunently ln Use
Tank Capacrty: 6000
TankChemical: Gasoline
u003124996
u003118749
N/A
REEDS AUTO SEFVTCE
905 MAIN ST
slLT, co 81652
UST
LUST
o'*':l',1J?'
Active:
UST:
Owner Name:
Owner Address:
Date lnstalled:
Material:
Construction:
Tank Status:
Tank Capacity:
Tank Chemical:
Owner Name:
Owner Address:
Date tnstalled:
Material:
Construction:
Tank Status:
Tank Capacity:
Tank Chemical:
REEDS AUTO SERVICE
90 S MAIN ST
Not reported
Gafuanized Steel
Asphalt Coated or Bare Steel
Permanently Out of Use
2000
Diesel
BEEDS AUTO SERVICE
90 S MAIN ST
Not reported
Galvanized Ste€l
Asphalt Coated or Bare Steel
Permanently Out o, Uss
500
Used Oil
6936
4538
No
TC462375.1s Pags I
l
ron
rce
ce (tt.)
Map lD
Direction
Distance
Distance (ft.)
Elry{ion Sitery EDR lD Number
Database(s) EpA lD Number
u003118749
REEDS AUTO SERVTCE (Continued)
OwnerName: REEDS AUTO SERVTCE
Owner Address: 90 S MAIN ST
Date lnstrlled: Not reportedMaterial: Galvanized Steel
Construclion: Asphalt Coated or Bare SteelTank Stafus: permanently Out of Use
Tank Capacity: 1000
TankChemical: Gasoline
Owner Name: REEDS AUTO SERVTCE
Owner Address: 90 S MAIN ST
Date lnstalled: Not reportedMaterial: Galvanized SteelConstruction: Asphalt Coated or Bare SteelTank Status: permanently Out of Use
Tank Capacity: 2000
TankChemical: Gasoline
TC462375.1s Page 10
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GEOCHECK VERSION 2.1 ADDENDUM
FEDEHAL DATABASE WELL TNFOHMATION
,O*r..ooro
Site lD:
Site fype:
Year Constructed:
Altitude:
Well Depth:
Depth to Water Table:
Date Measured:
UTHOLOGIC DATA
Well Closest to Target property (Eastem Ouadrant)
3931 581 07374801 Distanco lrom TP:
Single well, other than collector or Ranney type1962 County:
5575.00 ft. State:
1 - 2 Miles
Garfield
Colorado
Pediment
Observation
Domestic
Geologic Age lD (EralSystem/Series):
Principal Lithology ot Unit:
Further Descnption:
WATER LEVEL VARIABIUTY
Water Level: 55.26 ft.
DatE Measured: 0810718'l
Topographic Setting:
Prim. Use of Site:
prim. Use ot Waten
Cenozoic-Quatemary-Holocene
Not Reported
Not Reported
80.00 fr.
67.76 ft.
08071 980
Water Level: 49.56 ft.
Dat6 Measured: 08/1U92
TC462375.1s Page A1
o
.SIC WELL
GeologicAge lD (Ere/System/Series): Cenozoic-Tertiary-Eocene
GEOCHECK VERSION 2.1
FEDERAL DATABASE. WELL, INFORMATION
Well Closest to Target Property (Westem euadrant)
3931 371 07432401 Oistance from TP: >2 Miles
Single well, other than collector or Ranney type
DATA
Site lD:
Site Type:
Y6ar Constructed:
Altitude:
Well Depth:
Depth to Water Table:
Date Measured:
TIOLOGIC DATA
Principal Lithology of Unit:
iuriher Descnpton:
\TER LEVEL VARIABIUTY
l/ater Level: 40.O2fi.
late Measured: 10129173
l/ater Level: 42.44tI.
)ate Measured: 08119/Tl
Not Reported
Not Reported
Water Level: 40.34 ft.
Date Measured: 01lOZl7S
Water Level: 41.75 ft.
Date Measured: 09128n8
County: GarfieldState: Colorado
Topographic Setting: Not Reported
Prim. Use of Site: Observation
Prim. Use of Wat€c Unused
Water Level: 39.34 ft.
Date Measured: O1l?2f16
Water Level: 40.93 ft.
Date Measured:. 08123176
1 967
5510.00 ft.
300.00 ft.
40.00 tt.
1 001 1 973
{I
TC462375.1s PageA2
GEOCHECK VERSION 2.1
STATE DATABASE WELL INFORMATION
Well Within 0 - 1/8 Mile of Target property (Northem euadrant)
lntormation:
iite Name:
Iailing Address:
-elephone:
Vater Division:
leceipt:
iuffix Code:
ralid Well:
pplication Date:
.pplication Status:
)ermrt Status:
'ermit Strat Date:
ast Action Updated:
ast Action Date:
SIEVERS CLYDE H
BOX 217
slLT, CO 816s2
Not Reported
5
911419s
Not Reported
Not reported
Not Reported
Not Reported
Not Reported
Not Reported
Not Reported
Not Reported
County Code:
Permit Number:
Beplacement Code:
Parcel:
23
s9849
Not Reported
Not F€ported
00
Not Reported
060s
NE
Not Beported
Not Report€d
Not Reported
TC462375.1s Page A3
ermit, Denial (AD) or Monitoring Hole tssued:'onstructiory'Test report Received by DWR:
/ell Proposed Yield (GaUMin):
/ell Proposed Depth (Feet):
'roposed Annual Appropriation (Acre Feet):
/ell Application Type:
/ell Type:
irst BenEficial UsE Date:
rat€ Statement of Use Beceived:
ate}endod to lnclude Animats:
;ryfrH:lo1l",*",,"0,
'lugged an Abandonod Dat6:
nnual Appropriation in Acre Feet:
opth to Top of 1st Perlorated Casing:
epth to Base of Last Perforated Casing:
iater Gourt Case Numben
ield in Gallons Per Minute:
rtal Depth of Well:
apth to Static Water Level:
round Surface Elevation:
cres lrdgated:
ctaling Flow Meter Reqd., lnstalled:
ross Relersnce to Another W€ll or Record:
otice o, Well Completion Becvd. for Non-tnb Aquifec
otice of Beneficial Use Recvd. tor Non-trib Aquiter:
rell lD Numben
'ell.Construstion Completed Date:
rmp lnstallaton Completed Date:
eophysical is Required and Received:
)nmcto/s ucense:
.rmp lnstalle/s License:
rmp lnstallation Report to DWB:
aMa Which Permit lssued Unden
rct Staff Member to Update File:
Not Reported
Not Reported
0.00
0
0.00
Not reported
Not reported
07l10t't972
Not Reported
Not Reported
Noi Reported
Not Reported
Not Reported
0.00
0000
0000
Not Reported
6.00
100
20
0
0.00
N
000000
Not Reported
Not Reported
Not Reported
Not Reported
Not Reported
Not reported
Not Reportod
Not Reported
Not Reported
Not Reported
Not Reported
45
Basin Mgmt Dist |Jumb:
Dist from Sectton Line:
Township:
1/4 S€ction:
1t4 114 1t4:
2nd Aquiler:
Lot Number:
ater District:
foundwater Basin Numb:
incipal Meridian:
lnge:ft
.rb Division:
99
S
0920w
09
SE
Not Reported
Not Reported
GEOCHECK VERSION 2.1
STATE. DATABASE"WELL. IN FORMATION
Numben
Approval Engineer:
Comments:
Usage:
Sita Name:
Mailing Address:
Telephone:
Water Division: 5
Receipt:
Suffix Code:
Valid Well:
Application Date:
Application Status:
Permit Status:
Permil Stal Date:
Last Action Updated:
Last Action Date:
Not Reported
Not Reported
Not Reported
Domestic
03831 86
Not Reported
Yes
0380/1995
Well permit issued
Noi Reported
Not Beported
Well construction report received
09/17l1996
Filing Number:
Designatton Number:
Not Reported
Not Reported
23
1 85781
Not Reported
Not Reported
00
1879N 1724W
060s
TC462375.1s PageA4
Well Within 114 -'UZ Mile of Target property (Eastem Ouadrant)
KNISELY JACKIE & JAY HARTMAN
BOX 1268
EDWARDS. CO 81632
9705247893
County Code:
Permit Numbsn
Beplacement Code:
Parcel:
Permit, Denial (AD) or Monitoring Hole lssued:
Construction/Tesl report Received by DWR:
Well Proposed Yield (GaUMin):
Well Proposed Depth (Fe€t):
mmffir'irin1Priation
(Acre Feet) :
First Beneficial Use Date:
Date Statem€nt ol Use Received:
Date Amended to lnclude Animals:
Permit Expiration Date:
Abandonment Report Recoived:
Plugged an Abandoned Date:
Annual Appropriation in Acre Feet:
Depth to Top ol lst Pertorated Casing:
Depth to Base ol Last Perforated Casing:
Water Coun Case Numben
Yield in Gallons Per Minute:
fotal Depth of Well:
Depth to Static Water Level:
Ground Surlace Elevation:
Acr€s lnigated:
Totaling Flow Meter Reqd., lnstalled:
Cross Reference to Another Well or Record:
Notice of Well Completion Recvd. lor Non-trib Aquifer:
Notice of Beneficial Use Rec,\d. ror Non-trib Aquiler:
Well lD Numbec
Well Construction Completed Date:
Pump lnstallation Completed Date:
Geophysical is Hequired and Received:
Contractot's License:
Pump lnstalle/s License:
Pump lnstallatioft Report to DWR:
Statute Which Permit lssued Under:
Laslslatt Member to Uodate File:
#;:lr;asinNumb: oo
Principal Meridian: S
Range: 0920W
0t05/1 995
09/16/1996
15.00
€
3.00
Regular
ExBmpt
Not Reported
Not Reported
Not Reported
05/0v1997
Not Reported
Not Reported
0.00
0020
0037
Not Reported
15.00
37I
0
0.00
Not Reported
Not Reported
Not Reported
Not Heport€d
00000
09/06/1 996
Not Reported
Not reported
634
Not Reported
Not Reported
6023
NLH
39
Basin Mgmt Dist Numb:
Dist lrom Section Line:
Township:
GEOCHECK VERSION 2.1
STATE DATABASE WELL TNFORMATION
Section:
1t4 1t4:
Aquif€r:
Sub Division:
Block Number
Approval Engineen
Comments:
Usage:
10
SE
GW
KEITHLEY
Not Rgported
JD2
'll4 Section:
114 1t4 114:
2nd Aquifer:
Lot Number:
Filing Number:
Dssignatton Number:
County Code:
Permit Numben
Replacement Code:
Parcel:
NW
Not Reported
Not Reportsd
B
Not Fleported
Not Reported
23
7494
Not Reported
Not Reported
3 SFD, 1 AC IRR, DOM ANIMALS, ONLY WELL ON 38.361 AC
Domestic, Permit issued under presumption (g) (b) (ll) (A) for domsstic/livostock uses as
the only well on 35 acres
Well Within 1/2 - 1 Mile of Target property (Southem euadrant)
HAZELBUSH CHARLIE
Not Reported
slLT, co 816s2
Not Reported
Site Name:
Mailing Address:
Telephone:
Water Division: 5Receipt 9113540
Suffx Code:
Valid Well:
Application Date:
Application Slatus:
PemilStatus:
Pemit Stat Dats:lAaion Uodated:
JAaionoate:
Not Reported
Not reported
Not Heported
Not Repori€d
Not Raported
Not Reported
Not Repoded
Not Reported
Permit, Denial (AD) or Monitoring Hole lssued:
Construction/Test report Received by DWR:
W€ll Proposed Yield (GaUMin):
Well Proposed Depth (Feet):
Poposed Annual Appropriation (Acre Feet):
Wdl Application Type:
Well Type:
First Beneficial Use Dats:
Date Statement ol Use Received:
Date AmEnded to lnclucls Animals:
Pemit Expiration Date:
Abandonment Report Becsived:
Plugged an Abandoned Dale:
Annual Appropriation in Acre Feet:
Deplh to Top ot 1st Psrforatecl Casing:
Depth to Base of Last Perforated Casing:
Water Court Caso Numben
Yield in Gallons Per Minute:
Total Depth ot Well:
Depth to Statc Wat8r Level:
Ground SurlacE Elevation:
Acrss lnigated:
Totaling Flow Meter Reqd., lnstalled:
Cross Relerence to Another Well or Record:
NoUce of Well Completion Recvd. for Non-trib Aquifer:
Notice of Beneficial Use Recvd. for Non-trib Aquifer:
Well lD NumbEn
Well Construction Completed Date:
lo rnsarrauon Comoteted Date:
Jny=,"", rs nequlreo ano necerveo;
Contractol's Ucense:
Pump lnstalle/s License:
Pump lnstallation Report to DWR:
Nol Reported
Not Reported
0.00
0
0.00
Not reported
Not reportsd
06/10n960
Not R€ported
Not Reported
Not ReportEd
Not Reported
Not Reported
0.00
0000
0000
Not Rsported
10.00
120
30
0
0.00
Not Reported
000000
Not Reported
Not Reported
Not Reported
Not Reported
Not Reported
Not reported
Not Reported
Not Reponecl
Not Reported
TC462375.1s Page A5
GEOCHECK VERSION 2J
STATE DATABASE;WELL INFoRMATION
t" Which Permit tssued Undar:
Last Statf Member to Update File:
Water Districl:
Site Name:
Mailing Address:
Telephone:
Water Division:
Raceipt:
Suffix Code:
Valid Well:
trlilnft,
Pemit Stat Date:
Last Action Updated:
Last Action Date:
SIEVEHS CLYDE H & LUCY J
P O BOX 217
stLT, co 81652
8762443
5
0295608
F
No
04123t1979
Well permit issued
Not Beported
Not Reported
Not Reported
Not Reported
39
Basin Mgmt Dist Numb:
Dist lrom Section Line:
Township:
'l14 Section:
1t4 114 1t4:
2nd Aquilen
Lot Number:
Filing Numben
Designation Number:
County Code:
Pemit Numben
Replacement Code:
Parcel:
Groundwater Basin Numb:
Principal Meridian:
Range:
Section:
1t4 1t4:
Aquifen
Sub Division:
Block Number:
Approval Engineen
Comments:
Usage:
oo
S
0920w
10
SW
Not Reported
Not Reported
Not Reported
Not Roported
Not Reported
Domestic
00
Not Reported
060s
sw
Not Reported
Not Beported
Nol Reported
Not Reported
Not Reported
23
24328
Not Reported
Not Reportad
Well Within 0 - 'll8 Mile of Targ€t property (Westem euactrant)
Permit, Denial (AD) or Monitoring Hote tssued:
Constructiory'Test report Received by DWR:
Well Proposed Yietd (GaUMin):
Well Proposed Depth (Feet):
Proposed Annual Appropriation (Acre Feet):
Well Application Type:
Well Type:
Firct Beneficial Use Date:
Date Statement of Use Received:
Date Amended to lncluds Animals:
Permit Expiration Dats:
Abandonment Report Beceivsd:
Plugged an Abandoned Date:
Annual Appropnation in Acre Feet:
Depth to Top of 1st Perforated Casing:
Depth to Base ol Last Perlorated Casing:
WalEr Court Case Numben
Yiold in Gallons Per MinutE:
Total Depth of Well:
Depth to Static Water Level:
Ground Surface Elevatron:
Acres lnigated:
Totaling Flcw Meter Reqd., lnstalled:
Cross Referenco to Another Well or Record:
_#l,t##I',Xi:ll?il1;l"J}:ilYlfi:,:f ''
Well Construction Completed Date:
Pump lnstallation Completed Oate:
Record change. A portion o, ths file was modified
09/i26/1996
09/13/1979
Not Feported
0.00
0
0.00
Regular
Non-exempt
Not Reported
Not Reported
Not Reported
09/1U1980
Not Reported
Not Reported
0.00
0000
0000
Not Reponed
0.00
0
0
0
0.00
Not Raported
059849
Not Reported
Not Reportsd
00000
Not Reported
Not Reported
TC462375.1s PageA6
GEOCHECK VERSION 2.l
STATE"DATABASE WELL INFORMATION
eophysical is Required and Fleceived:
contractors License:
Pump lnstalle/s License:
Pump Installation Report to DWR:
StatlIte Which Permit lssued Under:
Lasi Staf, Member to Update File:
Water District:
Groundwater Basin Numb:
Principal Meridian:
Range:
Segtion:
114114:
Aquifen
Sub Division:
Block Numbec
Approval Engineen
Comments:
Usage:
Not reported
Ltc
Not Reported
Not Reported
Not Reported
SMJ
45
Basin Mgmt Dist Numb:
Dist lrom Section Line:
Iownship:
'tl4 Section:
1t41141t4:
2nd Aquifer:
Lot Numben
Filing Numben
Designation Number:
00
S
0920w
09
SE
Not Reported
Not Reportsd
Not Reportad
Not Reported
Not Reported
Commercial
00
2000N 9s0E
060s
NE
Not Reported
Not Reported
Not Reported
Not Reported
Not Reported
TC462375.1s PageA7
GEOCHECK VEHSION 2J
PUBLIC WATER SUPPLY SYSTEM TNFORMATION
o)WS SUMMARY:
PWS ID:
Date lnitiated:
PWS Name:
Addressee / Facility:
Facility Latitude:
City Served:
Treatment Class:
Searched by Nearest pWS.
CO0084186 PWS Status:
June 12077 Date Deactivatecl:
ASGARD SUBD WTR SYSTEM
0225 CNTY RD 266
RTFLE il, CO 81652
Not Reported
39 32 54
RIFLE
Untreated
Active Distance from TP: 1/2 - 1 Mils
Not Reported Dir relatrve to TP: East
Facility Longitude: 107 39 20
Population Served: Under 101 Persons
NoPWS cunently has or has had maior violation(s) or entorcemanl:
I
I
TC462375.1s Page AB
GOVERNMENT RECORDS SEARCHED / DATA CURRENCY THACKING
maintain curency of the tollowing federal and state databases, EDR contacts the appropriate governmental agency
monthly or quarterly basis, as required.
Elapsed ASTM days: Provides confirmation that this EDR report meets or exce€ds the 9o{ay updating requir€mont
o, the ASTM standard.
FEDERAL ASTM STANDARD RECORDS
NPL: National Priority List
Source: EPA
Telephone: N/A
National Priorities List (Superlund). The NPL is a subsgt ol CERCLIS and identifies over 1,200 sites for priority
cleanup under the Superfund Program. NPL sites may encompass relatively large areas. As such. EDR provides polygon
coverage for over 1,000 NPL site boundanes produced by EPA's Environmental Photographic lnterpretation Center
(EPrC).
Daie of Govemment Version: 07122199
Date Made Active at EDR: 09/10/99
Dalabase Release Frequenry: Semi-Annually
DEUSTED NPL: NPL Deletions
Source: EPA
Telephone: N/A
The National Oil and Hazardous Substances Pollution Contingency Plan (NCP) establishes the cntsria that ths
EPA uses to delete stt6s from the NPL. ln accordance wrth 40 CFR 300.425.(e), sites may be deleted from the
NPL where no further response is appropnate.
Date of Govemment Version: 0624199
Date Made Active at EDR: 09/10/99
Database Release Frequency: Semi-Annually
Cr:,'#f,iiT:ff;:"'ronmentar
Response' compensation' and Liabiritv rnrormation svstem
CERCUS contains data on potentially harardous waste sites that have been reported to the USEPA by states, municipalities,
private companies ancl privat€ penions, pursuant to Section 103 of the Comprehensive Environmental Response, Compensation,
and Uability Act (CERC[ A). CERCLIS contains sites which are either propos€d to or on the National Priorfies
List (NPL) and sit€s which are in the scr€ening and assessmont phase for possible inclusion on ths NPL.
Date ol Data Anival at EDR: 0U05/99
Elapsed ASTM days:36
Dato o, Last EDR Contact 11/08/99
Date of Oata Anival at EDR: 0U10/99
Elapsed ASTM days:31
Date of I ast EDR Contact 11/08/99
Date of Data Anival at EDR: 08/30/99
Elapsed ASTM days: 73
Date ot Last EDR Contact 11l299g
Date of Data Anival at EDR: 08130/99
Elapsed ASTM days: 73
Date of Last EDR Contact 11129199
CERCUS-NFRAP: No Further Remedial Action Planned
Source: EPA
Telephone: 703-413-0223
As of February 1995. CERCUS sites designated'No Further Remedial Action Planned'(NFRAP) have been removed
from CEBCLIS. NFRAP sites may be sites where, following an initial investigation, no coniaminaton was tound,
contamination was removed quickly without the need ,or the site to be placed on the NPL, or the contamination
was not ssrious enough to require Federal Superfund action or NPL consideration. EPA has removed approximatsly
25,000 NFBAP sitos to lift the unintsndod barriers to the redev€lopment ot thsse properties and has archived them
as historical records so EPA does not needlessly repeat ths investigations in the future. This policy changa is
part of the EPA's Brownfields Redevelopment Program to help cities, stat€s, privato investors and atlected citizens
to promota economic redevslopmsnl ot unproductiv€ u'ban sites.
DatE of Govemment Version: 0U26/99
Date Made Active at EDR: 11/1 1/99
Database Release Freguency: Quarterly
Date of Govemment Version: 08/26/99
Date Made Activo 8t EDB: 11/11/99
Database Release Frequency: Quarterly
TC462375.1s Page A9
GOVERNMENT RECORDS SEARCHED / DATA CURRENCY TRACKING
CORRACTS: Conective Action ReportI source: EPA
U Tebpnone: 800424-9346
COHRACTS identifies hzTardous wast6 handlors with RCRA conectivs acxon actvity.
Date of Govemment Version: 09/07/99
Date Made Active at EDR: 10/28199
Database Release Frequenry: Semi-Annually
Dale of Data Anival at EDR: 09/1U99
Elapsed ASTM days: 45
Dats of Last EDR Contact 1?/1U99
Dat6 of Data Arival at EDR: 10/06199
Elapsed ASTM days: 42
Date ol Last EDR Contaa:01/03/00
Date of Last EDR Contact: 1UaOE9
Date of Next Scheduled EDR Contact 0320/00
Dat€ ot Last EDR Contact Varies
Date of Next Scheduled EDB Contact N/A
Date of Last EDR Contast 01/10/00
Date ol Next Scheduled EDR Contact 04/10/00
ERNS: Emergency Response Notification System
Source: EPA/NTIS
Telephone: 202-260 -2U2
Emergency Response Notitication System. EFINS records and stores information on reported releases of oil and ha'ardous
substancas.
Date ol Govemment Vgrsion: 01/0U00
Date Made Active at EDR: 0Z0Bl00
Database Belease Frequenry: Ouarterly
FEDERAL ASTM SUPPLEMENTAL BECOFDS
lS: Biennial Reporting System
Sourcs: EPA/NTIS
RCRIS: Resource Conservation and Becovery lnlormation System
Source: EPA/NTIS
Telephone: 800-424-9346
Resourcs Conseryation and Recovery lniormation System. BCRIS includes selective information on sitss which generate,
transport' storB, treat and/or dispose 6f haral(sus wast€ as defined by the Resource Cons6rvation and Recovery
Act (BCRA).
Date ol Govemment Version: 09/01/99
Date Made Active at EDR: 1il17199
Database Release Frequencl6 Semi-Annually
Date of Data Anival at EDR: 01/31O0
Elapsed ASTM days: 8
Date ot Last EDR Contact 11/01/99
Telephone: 80G424-9345
The Biennial Beporting System is a national system aclministered by the EpA thal collects data on the generation
and managemont of he'ardous wasta. BRS captures detailed data from two groupsr Large auantity-Generators (LoG)
and Treetm€nt, Storage, and Disposal Facilitles.
Date of Govemment Version: 12131197
Database Release Frequenry: Biennially
CONSENT: Superlund (CERCLA) Consent Decrees
Source: EPA Regional Otfices
Telephone: Varies
Malor legal setdements that establish r8sponsibility and standards for cleanup at NpL (Supertund) sites. Releasedperiodically by United States Dismd Courts aftsr settement by parties to titigation matters.
Dats of Govemmsnt Version: Varies
Database Release Frequenqy: Varies
RCID: Records Of Decision
Source: NTIS
Telephone: 70$416-0223
Recod ol DEcision. ROD documenls mandate a p€rmanent remedy at an NpL (Superfund) site containing technical
and health informaton to aid in the cleanup.
Date of Govemment Vecion: 01/31/99
Database Release Frequency: Annually
TC462375.1s Pag6 A10
GOVERNMENT RECORDS SEARCHED / DATA CURRENCY TRACKING
-[t[os:
Facility rndex systern/Facility ldentification lnitiative program summary Report
I;:,'#;ilt,o
Facility lndex System. FINDS contains both lacility inlormation and 'pointerc' to othsr sourcBs that contain morodetail. EDR includEs the lollowing FINDS databasEs in this report eCS (Permit Complianco System), AIRS (Aerometric
lnlormation Retrieval syst€m), DocKET (Enforcement Docket usEd to manage and track information on civil iudichlenforcement cases for all environmentral statutes), FURS (Federal Underground lniection control), GDooKET (criminal
Docket System used to track criminal enrorcement actions for all environmental statutes), FFIS (Federal Facilitieslnlormation System;' STATE (State Environmental Laws and Statutes), and pADS (pCB Activity Data System).
HMIFS: f{arn6l6sg Mat8dals lnformation Repoding Systom
Source: U.S. Department o, Transponetion
Telephone: 202-366-4526
Hazardous Materials lncident Repon Syst€m. HMIRS contains hazardous material spill incidents reported to DOT.
Date of Govemment Version: 0680/199
DatabasE Release Frequencl6 Annually
Date of Govemment Version: to/ig/199
Database Release Frequencl6 Quarterly
Date ol Govemment Version: 10/15/91
DatabasE Release Frequenry: No Update planned
Date of Govemment Version: 0&17/95
Database Release Frequency: No Update planned
Dat6 of Last EDB Contact O1l12lc[.
Date of Next Scheduled EDR Contact 04l1OlOO
Date of Last EDR Contact 10128/99
Date ot Next SchEduled EDR Contact 0112U00
Date ol Last EDR Contast 01/10/00
Date ol Next Scheduled EDR Contact 04/10/00
Data of I ast EDR Contast 01/03/00
Dat€ of Nert Schedulod EDR Contact 0/U0U00
Date ot Last EDR Contact fin4Bg
Date ol NExt Scheduled EDR Contact O?l21lOO
Dale ot Last EDR Contact 1 1/09199
Date ot Next Sdreduled EDR Contast OAIUOO
Date ot Last EDB Contact: 1?/13/l)9
Date of Next Scheduled EDR Contact 03U1U00
MLTS: Material Licensing Tracking System
Source: Nuclear Regulatory Commission
Telephone: 301.{15-7169
MLTS is maintained by the Nuclear Regulatory Commission and contains a list of approximately g,100 sites whichpossess or use radioactive materials and which are subigct to NRC licensing requirements. To maintain cursncy,
EDR contacts the Agency on a quartsdy basis.
Date of Govemmenl Veraion: 10r29tr9
Database Helease Frequency euarterly
MINES: Mlnes Master lndex File
^r.source: Deparfient of Labor, Mine salety and Health Adminisfation
letepnme: 30&231-5959
Date ol Govemment Version: 08/01/l9B
Database Release Frequency: Semi-Annually
NPL LIENS: Federal Superfund Liens
Source: EPA
Telephone : 205-56 44267
Federal Suporfund Llsns. under th9 authonty granted the USEPA by the compreh€nsrvo Environmental Response, Compensationand Uability Act (CEBC[A) of 1980, thE USEPA has the authority to fite liens against reat property in order
to racover remedial action expendifuros or when the property owner receives notification of potential liability,
USEPA compiles a listing ot liled notices of Superlund Liens.
PADS: PCB Activity Database Syst€m
Source: EPA
Telephone: 202-260-3936
PCB Astivity Database. PADS ldentifies generators, transporterc, commercial storers and/or brokers and clisposersol PCB's who are required to notiry thg EpA ot such activities.
Date o, Gov€mment Vercion: 09122,97
Database Release Frequency: No Update plannecl
RAATS: RCHA Administrative Action Tracking System
Source: EPA
Telephone: 202-5644104
RCRA Administration Astion Tracking System. RAATS contains records basect on enlorcement actions issued undEr RCRI\pertalning to maior violators ancl includes administrative and civil actions brought by the EpA. For administration
actions after september 30' 1995' data entry in the RAATS database was discontinued. EpA will retain a copy of
the database lor historical records. lt was necessary to terminate HMTS because a decrease in agenry rssources
made it impossible to continus to update thE inlormation contained in ths databas€.
TC462375.1s PageAll
GOVERNMENT-RECORDS SEARCH ED, I DATA CURRENCY TRACKING
dlt"*:1,?Ehamical
Flerease I nventory sysrem
VT"i"pnone: 202-260-1 531
foic Release lnvontory System. TRIS identrfies tacilities which release toxic chemicals to the air, water and
land in reportable quantities uncler SARA TiUe lll Section 313.
Date of Govemment Version: 1A31El
Database Release Frequenry: Annually
TSCA: Toxic Substances Control Act
SourcE: EPA
Telephone: 202-260-1 444
Toxic Subsiances control Act. TSCA identiftes manulaeturers and importers ol chemical substances included on the
TSCA Chemical substance lnventory list. lt includas data on the production volume ot these substances by phnt
site.
Date of Last EDR Contaa: 1A27Eg
Date of Next Scheduled EDR Contact O3f27l0O
Date o, Last EDR Contact 01/03/00
Dale ot Next Scheduled EDB Contact O4n4n0
Date ol Data Anival at EDR: 08130199
Elaps€d ASru days: 73
Dat€ ol Last EDR Contact PnTtglg
Date of Data Arival at EDR:0212199
Elapsed ASTM days:24
Date ot Last EDB Contact 1U1N99
Date of Data Anival at EDR:01/10/00
Elapsed ASTM days:23
Date of I ast EDR Contact 01/10/00
STATE OFCOLORADO ASTM STANDARD RECORDS
SHWS: CERCLIS
SourcE: EPA
Telephone: 70341.3422,3
Stal6 Hazadous Waste Sites. Stiate ha,ardous wase site records ars thg strates, eguivalent to CERCLIS. These sites
rnay or rnay not already be listed on the lederal CERCLIS list Priority sites planned for cleanup using statg funds
(state equivalent ol Superlund) are idontilied along with sites where cteanup will be paid lor by potenti"tty
rssponsible parties. Available information varbs by state.
Date ol Govemment Vercion: 12i€1194
Database Release Frequency: Every 4 Years
Dele of GovsmmBnt Version: 08126lgg
Date Made Active at EDR: 11/11199
Dalabase Release Frequency Quailerly
Date of Govemment Version: 01/12/99
Date Made Active at EDR: 0U08/99
Database Flelease Frequenq6 Annually
Date ol Govemment Version: 01/0U00
DatE Made Active at EDR: 0202/00
Database Release Frequency: Semi-Annually
LF: Solld Waste Sites & Facilities
Sourcs: Deparfnentol Heal$l
Telephone: 303-692-3450
Solid Waste Facilities/Landfill Sites. SWF/LF h/pe records tlpically contain an inventory ol solid waste disposal
lacilitles or landlllls in a particular stat€. Depending on ths state, these may be active or inactive ladlities
or opsn dumps that lailed to m8et RCRA SubtiUe D Seaion 4004 criteria tor solid waste landfills or disposal
sites.
LUST: Leaking Underyrcund Storage Tank List
Sourcs: D€partment of Labor and Emptoyrnent, Oil lnspecton Srtion
Telephone: 303-620-4021
The Leaking Underground Storage Tank Ust contalns sites that havo cornpleted cleanup activities. This does not
mean that the owner and/or operator hEul removed all ol the contamination, bul instead means that thg actions taken
have mst ths critelia that the dMsion uses for determining adequats deanup. lt also contains those sites that
have either been iust ldentified as having a leak. or are in the process of remediating the contarninant problom
but have not y€t been closed and therelore the site has not received a final agency determination. lncllrded in
this catagory are those.sites that have complat€d active remedistion and are now conducting groun&yatsr rnonitoring
Prcgrams. Every elfott ls made to ensure lhe acqrracy ol the data contained in this databasi, trowever, the Departm-nt
ol Public Health and Errvironment does not guaranteo that thls listing is complstely ac@rat6 or up-tdats. ln
the event that site specilic data is desired or necessary to ensura accurasy, you are sncouraged to contact our
Records center at (303) 692-33:!1 to anangs a meeting to review the site file(s).
TC462375.1s Pago A12
GOVERNMENT RECORDS SEARCHED / DATA CURRENCYTRACKING"
TBUST: Lust Trust Sites
Source; Department o, Healtt
Telephone: 30$620.4016
Ust o, complaint sites where there is no known responsible party. The slate is doing investigations on them.
Date of Govemment Version: 12J07199
Date Made Active at EDR: 01/06/00
Databasa Belease Frequency: Semi-Annually
Date of Data Arival al EDR: 1208199
Elapsed ASTM days:29
Date ol Last EDB Contacr 12lo7g9
Date ot Data Anival at EDR: 10/1289
Elapsed ASTM days:23
Date of Last EDF Contatt 01/10/00
Daie ol Last EDR Contact 09/05/196
Date of Next Scheduled EDR Contact tl/A
Date of Last EDR Contact 12l13Bg
Date of Next scheduled EDR contact 0g13ro0
Date of Last EDR Contas[ 1 1/08/99
Date ol Next Scheduled EDR Contact O2/OT|OO
Date ol Last EDR Conast O'llz7F,s
Date of Next Scheduled EDH Contact wA
Date of Last EDR Contact O1l27Es
Date ot Next Schedulad EDR Contact tl/A
Date o, Last EDR Contact 1?127199
Date ot Next Scheduled EDR Contact OSlZill0O
UST: Undergrcund Storage Tank Database
Source: Deparfnent ol Labor and Employment, Oil lnspoction Section
Telephone: 30S620-4021
Registered Undeqround Storage Tanks. USTs are regulated under Sublitle I of the Resource Consorvation and Recovery
Act (RCRA) and must be r€gistalad with the state depaflmont responsible lor administedng 1re UST prog6m. Available
inbnnation vari$ by stet6 program.
Date ol Govemment Version: 10112,919
Date Made Active at EDR: 11/04tr9
Database Belease Frequenry: Somi-Annually
STATE OF COLORADO ASTM SUPPLEMENTAL RECORDS
HIST LF: Histodcal Landfill List
Source: Dgpartnent of Hsalul
Telephone: 3O&692-3.t50
Abandoned/lnactive Landfi lls.
Date ol Govemmont Version: 01131/93
Database Release Frequenry: No Updato Plann€d
AST: AbovegoundTank List
Source: Departnent of Labor and Employment, Oil lnspection Section
Telephone: 303{20-402'l
Registered Aboveground Storage Tanks.
Date ol Govemment Vension: 1zl1/9g
Database Release Frequancy Semi-Annually
COERNS: EHNS
Source: Oepartrnsnt of Public Health and Environmental
Telephone: 30&692-2000
Date ol Govemment Version: 1215/99
Database Releas€ Frequenry: Quaierly
METHANE SITE: Methane Site lnvestigations - Jeflerson County 19BO
Source: Jefleron County Heatth Department
Telephone: 30&239-7175
Date of Govemment Version: 12J3118O
Database Release Frequency No Update Planned
METHANE INV: Methane Gas & Swamp Findings
Source: Dapartment of Hoal0r
Telephone: 303.64G8t!35
Dale ol Govemmsnt Version: 0U15179
Database Belease Freguency No Update Plann€d
VCP: Voluntary Cleanup & Redevelopmenl Act Applicatton Tracking Report
Source: D€parfiiont ol Public Health and Environment
Telephone: 303-692-3!lil1
The Voluntary Cloanup and Redevelopmenl Act is intended to permit and encourage voluntary cleanups by providing
a method to dslemino clean-up responsibilities in planning tho reuse of property. The VCRA was intonded lor sites
whidt wele not covered by existing regulatory programs.
Date of Govemment Vsrsion: 11/30/199
Database Release Frequency: Semi-Annually
TC'152375.1s Page A13
GOVERNMENT RECORDS SEARCHED / DATA CURRENCY THACKTNG
LOCAL RECORDS
ADAMS COUNW:
Summary Beport on Melhane Gas Ht,,rcls and Surveys Conducted on Domestic and Demoliflon landlllts in Adams County
SourcE: Tri-County Health Department
Telephone: 303.761.1 340
DatE of Govemment Version: 1SlOBnB
Database Belease Frequency: No Update planned
ARAPAHOE COUNW:
A Survey ol Landfills in Arapahoe County
Source: Tri-County Heatth Department
Telephone: 303-761.1 s/to
Date of Govemment Version: 12B1nB
Database Release Frequency: No Update planned
BOULDER COUNTY:
Old Landllll Slter
Source: Boulder County Health Dapartment
Telephone: 30&441 -1 1 82
Date of Govemmsnt Version: 05/0't/86
Database Release Frequency No Update planned
DENVER COUNTY:
Landtlllc ln Denver County
Source: City and County of Denv€r
Telephone: 303.2854036
Date of Govemment Version: 12J0'llg4
Database Release Frequency: No Update planned
DOUGLASCOUNW:
Douglar County landflll Koy
Source: Tri€ounty Health Department
Telephone: 303.761-13O
Date of Govemment Version: OA|Izg1
Database Release Frequency: No Update planned
PUEBLO COUNTY:
Dedgnated Dlspoeal & Landllll Sllar
Source: Pueblo City-County Health Department
Telephone: 71 9-583-4il00
Date of Gov€mment Version: 04,/30/90
Database Release Frequency: No Update planned
Date of I rst EDR Contact 01127Er5
Date of Next Scheduled EDR Contact wA
Date of Last EDR Contasi: Oln7Fls
Date of Next Scheduled EDR Contact N/A
Date of Last EDR Contact 01/30198
Date of Next Scheduled EDR Contact i.l/A
Date of Last EDH Contast 1211U94
Date ol Next Scheduled EDR Contact N/A
Date ol Last EDR Contact 01t27F,s
Date o, N€xt Schedulad EDR Contact N/A
Dato of Last EDR Contact 'l'l/1995
Date of Next Scheduled EDR Contact N/A
TC462375.1s Page A14
GOVERNMENT RECORDS SEARCHED / DATA CURRENCY TRACKINGi
O rH! couNw:
Trl-county Area solld wasts Facilities List (Adams, Arapahoe and Douglas countles)
Source: Td-County Heahh Department
Telephone: 303-761 -1 340
Date ot Govemment Version: 10/15/83 Dat€ of Last EDR Contact Oll2lFis
Database Release Frequency: No Update Planned DatB ol Next Schedulsd EDR Contact N/A
WELD COUNTY:
Dlsposal & Tr.ltmsnt Slte!
Source: Weld County Health Department
Telephone: 970-353-0586
Date of Govemment Version: 11/01/95 Data of Last EDR Contact 11/13/l9S
Database Release Frequency No Update Planned Date ol Next Schodulod EDR Contact N/A
EDF PROPRTETARY DATABASES
Former Manulactured Gas (Coal Gac) Siter: The existence and location ot Coal Gas siles is provided exclusively to
EDR by Beal Property Scan, lnc. @opyright 1993 Real Property Scan, lnc. For a technical clescription ol the types
ol hazards which may bs lound at such sites, contast your EDR customer seMce representativ€.
Dlrclalmer Prcvided by Real propsrty Scan, lnc.
The inlormaton contained in thls report has predominantly bean obtained trom publlcly available sources produced by entites
otier than Real Property Scan. Whlle reasonable steps have been taken to insurE the acarrasy of this report, Beal Propery
Scan does not guarantee the acctrary ol this report. Any liability on the part of Beal Property Scan is stricdy limited to a refund' ol he amount paid. No claim is made lor the achial existenco of toxins at any site. This report does not constitute a legal
opinion.
HISTORICAL AND OTHER DATABASE(S)
Deponding on thg geographic area covered by this r6port, the data provided in theso specialty dalabases may or may not be
complets. For example, the existence ol wetancls inlormation data in a spscific report does not mean that all w€tlands in ths
area covered by the r€port are induded. Moreover, the absence ol any report€d w€Uands inlormation do6s not necessarily
mean that wedands do not exist in the area covered by the repon.
PWS: Public Water Sysiems
Source: EPA/ffice ol Drinking Water
Telephone : 202-260 -28Os
Public Water System data from the Federal Reporting Oata System. A PWS is any water systom which provides watsrto at
least 25 peopla lor at least 60 days annually. PWSs provide water trom wells, rivers and other sources.
PWS ENF: Public Water Systems Violation and Enlorcement Data
Source: EPA/Otfice of Ddnking Waler
Telephone : 202-260 -280s
Violation and Enlorcement data for Public Water Systoms lrom the Safe Drinking Wator lnformation System (SWDIS) after
August 1995. Prior to August 1995, the data came tlom the Federal Reporting Data System (FBDS).
Area Radon lnformation: The National Radon Database has b€en developed by the U.S. Environmental Protection Agency
(USEPA) and is a compilation ot the EPA/State Resiclential Radon Survey and tha National Residential Badon Survey. The
study covea ths years 1986 ' 1992. Where necessary data has bsen supplementecl by information collected at private sources
such as universities and research instiMions.
EPA Radon Zones: Sections 307 & 309 ol IRAA direcled EPA to list and identify areas of U.S. with the potential for
elevatscl indoor radon levels.
TC462375.1s PageAl5
GOVEHNMEN.rRECORDS SEARCHED I DAT"A CURHENCY TRACKTNG
OlUGas Pipelines/Elec-trical Transmission Lines: This data was obtained by EDR from th6 USGS in 1994. lt is retened to by
USGS as GeoData Digital Line Graphs from 1 :100,000-Scals Maps. lt was extracted f rom ths transportation catggory ioCuding
some oil, but primanly gas pipelines and electrical lransmission lines.
Senritive Receptots: There are individuals deemed sensitive rsceptors due to their lragile immune systems and special sensiMty
to environmontal discharges. These sensitive receptors typically include tho eldedy, tho sick, ancl chilclren. while the location of all
sonsiliv€ receptors cannot be determined, EDR indicates those buildings and facilities - schools, dayEares, hospitals, modical conters,
and nursing homes'where individuals who are ssnsitive receptors ar€ likely to be located.
USGS Water Wellr: ln November 1971 the Unhed States Geological Survey (USGS) implomonted a national water resource
inlormation tracking system. This clatabase contains descnptive infornation on sites where ths USGS collecls or hes collecbtt
data on surlace water and/or groundwat8r. The groundwater data includes information on more tran g00,000 wells, springs, and
oher sourcos of groundwater.
Flood Zone Oata: This data, available in select counties across the country, was obtainEd by EDB in 1999 lrom the Federal
Emergency Manag€ment Agency (FEMA). Data depicts 1 0O-year and 500-year flood zones as defined by FEMA.
NW: National Wedands Inventory. This data, available in select counties across the country, was obtained by EDR
in March 1997 from the U.S. Fish and Wildlife SeMce.
Epicsnteru: World earthquako epicenters, Richter 5 or greater
source: Dsparrnent of commerce, National oceanrc and Atrnospheric Administration
Water Dams: National lnvsntory ol Dams
SourcE: Federal Emergency Management Agency
Telephone: 202-646-2801
Natonal computer database of more than 74,000 dams maintained by the Federal Emergenry Management Agency.
Colorado GIS Well Datsbalg
Source: fficE of State Engineer, Oivision ot Water Resourcss
Telephone: 303-866-3581
The GIS Well database includEs all wells that the Division of Water Resources permits.
fC262375.1s Page 416
REGULATORY AND TECHNICAL ACRONYMS
ACMA Asbestos-Containing Material
AIIERA Asbestos Hazard Emergency Response Act
AIRS Aerometric Information Retrieval System
AST Aboveground Storage Tank
CDPITE colorado Deparnnent of Public Health & Environmenr
CERCLIS Comprehensive Environmental Response, Compensation and Liability Information
System
DOT Departnent of Transportation
EPA Environmental Protection Agency
ERNS Emergency Response Notification System
ESA Envirorunental Site Assessment
FRP Fiberglass Reinforced Plastic
LPST I-eaking Petroleum Storage Tank
LUST I*aking Underground Storage Tank
NPDES National Pollurant Discharge Elimination System
NPL National Priorities List
PCB Polychlorinated Biphenyl
PLM Polarized Light Microscopy
PST Petroleum Storage Tank
RAATS RCRA Administrative Action Tracking System
RCRA Resource Conservation and Recovery Act
USDA United States Deparunent of Agriculnrre
USGS United States Geological Survey
UST Underground Storage Tank
EXHIBIT H
Evidence shall be presented in the form of a report, containing soils testing results and design
recommendations and prepared by a Professional Geologist and a Geotechnical Engineer, or
by a professional meeting the qualifications of both Professional Geologist and Geotechnical
Engineer, with an appropriate level of experience investigating geologic hazards, stating that
the site will support the proposed facility.
Attached is a report prepared by H-P Geotechnical Consultants entitled, "Preliminary
Geotechnical Study Proposed Wastewater Treatment Plant - Scott Property - Silt, Colorado".
This study report investigates the preliminary geotechnical issues surrounding the selected
site. The report discusses the proposed development, site condition, the details of the field
exploration, including boring log, subsurface conditions and, finally, preliminary design
recommendations for foundation, floor slab, underdrain system, site grading and surface
drainage. That report is attached under this tab.
LOMrLc\oo.'l 26.oxh
?-|6-2AAA t4tAA H-P GEOTECH
FAX TRANSMITTAL FORM
TO:
COMPANY:
FAX NUMEEB:
FROM:
DATE:
MESSAGE:
P.AL/L6
HEPWOFTTH . PAWLAK GEOTECHNICAL INC.
5020 County Boad 194
Glenwood Sp,rlngc, Colorado 81601
Phone: 97O-945t988
Faxr 970-945€454
r-mafl : hpgeo@hpgpotech.com
JOB NUMBER;
NUMBER OF PAGES:
fne yylnal of this transminal will be sent by:
Ordinary Mall a
Fax Only a Other a
lf you experience any problems receiving this transmlsslon, please call:
o
SENT
,.-L6-2AAA M.AA H_P GEOTECH P.A?/t6
Hepworth-Pawluk Geottt:hnicglr Inc.
s01) County Road 154
Glcnwm<l Sprlrrgs, (jolorado tt I 6{l I
Phone: Y7O-9.5-7r88
Itax: 970-9a5.8454
hpgco@hpgeotrxhr:om
PRELIMINARY GEOTECIIMCAL STI.IDY
PROPOSED WASTE WA.TER TREATMENT PLANT
SCOTT PROPERTY
SILT, COLORADO
JOB NO. 100 222
I\,IARCE 16,2000
PREPARED FOR:
TOWN OF SILT
ATTN: CRAIG OLSON
P.O. BOX 70
sIr.T, coLoRADO 81652
?.a3/L6
-t6-2aia@ t4.AA H-P GEOTECH
HEPWORTII . PAWLAK GEOTECIIMCAL, INC.
March 16, 2000
Town of Silt
Attn: Craig Olson
P.O. Box 70
Silt, Colorado 81652 Iob No. l002Zz
Subject: Report Transmittal, Preliminary Geotechnical Study, Proposed Waste
-WaterTreatmentPlant,scottProperry,silt'Colorado'
Dcar Mr. Olson:
As requested, we have conductcd a geotcchnical study for thc proposcd trcatrucnt plant
at thc subject site.
Development of the property for the proposed treatment ptant appears suitable based ou
geotechnicat conditions. Thc devclopmJnt area should be protected against potential
flooding.
The subsoils encountered in the explorabry pirs excavated in the general proposed
dcvclopment area, bclow Yz to Zrh feet of existing fill and topsoil, typiTfy consist of 2
to 5 feet of loose saurl and Silt atrove relatively dense gravel, cobble and boulder
alluvium. Groundwater was ercoutrtered between 4rh and 7 feet in the pils'
Spread footfurgs ptaced on the natural subsoils and designed for an allowable beariug
pi"rr*" of 1,5@ psf for the upper sand aud silt soils to 3,000 to 4,000 psf for the
underlying gravel alluvium "pp"tt suitable for buitding support. The Srolnf water
level will likely be shalloweiduring spring runoff and rise of the river which could
make excavations difficult to dcwater.
The report which follows describes our exploration, summarizes our findings' and
presents our recosrmendations suitable for planning and preliminary design' It is
important that we provide cOnSuttation during design, and field services during
Coustnrction to review and monitor the implementation of the geotechnical
recommcndations.
Ifyou have any questions legarding this report, plcase contact us.
Sinccrely,
HEPWORTH - PAWLAK GEOTECHNICAL, INC.
Steven L. Pawlak, P.E.
Rev. By: DEH
SLP/rso
P.@4/L6,R-I6-2AAA !4tgt H-P GE0TECH
TABLE OF CONTENTS
PURPOSE AND SCOPE OF STUDY
PROPOSED DEVELOPMENT
SITE CONDITIONS
FIELD EXPLORATION
SUBSI.JRFACE CONDITIONS
PRELIMINARY DESIGN RECOMMENDATIONS
FOUNDATIONS .
FLOOR SLABS
T]I{DERDRAIN SYSTEM . . .
SITE GRADING
SURFACEDRAINAGE ...
LIMITATIONS .
FIGIJRE 1 . LOCATION OF EXPLORATORY PITS
3
1
3
4
4
4
O FIGIJRE 2 - Locs oF EXPLoRAToRY PIrs
FTGURE 3 . LEGEND AND NOTES
FIGURE 4. SWELL-CONSOLTDATION TEST RESULTS
FIGI,'RES 5 & 6 . GRADATION TEST RESI,JLTS
TABLE I - SIMMARY OF LABORATORY TEST RESULTS
H-P Georecx
P.W/L61RR-t1-aAgA L4.Zt H_P GEOTECH
PT,]RPOSE AND SCOPE OF STT.IDY
This report presents the results of a preliminary geotechnical study for a
proposed waste water Eeagnent plant to be located at the Scott propcrty, Silt, Colorado'
The project site is shown on Fig. 1. The purpose of the study was to evaluate the
subsurface conditions and thcir impact otr Ue project. Thc study was conductcd in
accordance with our ProPosal for georcchnical eugineering seilices to the Town of Silt'
dated February 23,200o.
A field. exploration progrtm consisting of exploratory pits was conducted to
obtain information on the subsurface cotrditions. Samples of the subsoils obtained
during Oe field exploration were 1esrcd in thc laboratory to tletermine their
classification, compressibiliry and other engineering characteristics- The results of the
freld exploration and laboratory testing were analyzed. to dcvelop recornrtendations for
project planning aud preliminary desigu. This rePort summarizes the data obtained
during this snrdy and prcsents our conclusions and recommctrdatious based on the
ptoposed developmeut and subsurface couditions encountered'
PROPO SED DE\TELOPMEI\IT
Plans for the waste water treatment plaut had not been devcloped at the time of
our srudy. We assume it will consist of ponds or lagoous and small lightly loaded
buildings. Cut and filI grading i.s assumed to be relatively minor'
When development plans have been determiued, we should bc contacted for
review and additional aualysis as needcd.
SITE CONDITIONS
The prOperty was vacant aud Covered with weedS, bruSh and Scattered
cottonwood trees at rhe rimc at thc time of our fietd work. An open clitch crosses the
nOrtheastertr pa.rt of the propeffy and an access ftail enters near souttt cenral part'
Gradiug has been performed in the central part of the properry for the ditch, access trail
ancl shallow fllling. The ground surfacc ovcrall is relatively flat with a gcntle slopo
H-P Georecu
H-P GEOTECH P.A6/L6NRR-15-2AUA t4't@1.
-2 -
down to the south towards the Colorado River. lnterstate 70 right-of-way borders thc
north sidc of the property.
trTELD EXPLORATION
The field exploration for the project was conducted on March 2, 2000.
Seven exploratory pis were excavated at the locations shown on Fig. I to evaluate the
subsurface conditions. The pits were dug with a rubber-tired backhoe provided by the
Town. The pits were Iogged by a representative of Hepworth-Pawlak Geotechnical,
Inc.
Samplcs of the subsoils were taken with relatively undisturbcd and disturbed
sampling methods. Depths'at which the samples were taken are shown on the Logs of
Exploratory Pis, Fig. 2. Thc samples wcrc returned to our laboratory for review by
rhe project engineer and testing. Sloned PVC pipe was insulled in the pits at the time
of backfilling for groundwater level monitoring.
SIJBSTJRFACE CONDITIONS
Graphic logs of the subsurface couditious encourtered at the site are shown on
Fig. 2. Below about th to Zt/z feet of existing fill and topsoil, the subsoils consist of 2
to 5 feet of loose sand and silt overlyiug relatively dense, slightly silty sandy gtavel,
sobble and boulder alluvitrm. The upper sand and silt soils were stratified and
cotrtahed clay aud gravel zotres. The soils were generalty moist to very moist and free
waterwasencounteredbetweenclepths of 4ll,'and7 feetinttueeof thesevenpits.
Laboratory tcsting pcrformed on samples obtained from the pits included nanual
moisture content and density, gradation analyses and liquid and plastic limits. Results
of coosolidation testing performed on a relativcly undisturbed sample of the upper fine'
grained soils, presented on Fig. 4, indicate low to moderate compressibility under
conditions of loading and wettiag. Results of gradation analyses performed on
disturbed bulk saurples (minus lth to 5 inch fracdon) of the natural coarse granular
subsoils are shown on Figs. 5 arul 6. The laboratory testing is summarized in Table I.
H.P GEOTECH
P.W/t61R-L6-2AZA L4tAL H-P GEOTECH
-3-
PRELIMINARY DESIGN RECOMMENDATIONS
The conclusions and recommendations presetrtd below are based on the general
proposed development, subsurtace conditions encountered in the exploratory pits' and
our experience in the area. The recommendatiqns are suitable for planning aud
prelimitrary rlesigu. A site specific study should bc conducted when the development
plans have been determined. Groundwatcr lcvcl monitoring should be continued
tbrough the spring and summcr to evaluate water level fluctuations'
FOUNDATIONS
Bearing conditions will vary depending on the specific locarion of the facilities
on the property and the excavation depth. Spread footings bearing on the nattual
subsoils should be suitahle for building support. We expect the footings can be sized
for an allowable bearing pressure in the lange of 1,500 psf for the upper fine-grained
soils to 3,000 to 4,000 psf for the underlying gravel alluvium. There could be
differential settlemcnt concerns for footings that span variablc bcaring conditions.
Strucrural fill, consistiug of the on-site coarse granular soils, could be used to achieve a
relatively uniform bearing condition after rernoving the upper fine-graiued soils'
Foundation walls should be desigued to spatr local anomalies and to resist lateral eartX
loadings when acting as retaining srructures. Below grade areas and retainhg walls
should be protected from hydrosutic loading by use of an underdrain system where
feasible, or be designed for hydrostatic loading and buoyatrt conditions.
FLOOR SLABS
Lightly loaded slabs shoutd be feasible for bearing on the nanrral soils. There
could be some diftbrential settlement of heavily loaded slnbs that transition the upper
fine-grained soils aod dense gravels. To reducc the effects of some diffcrential
rnovemenr, non-structural floor slabs should be separatcd ftom all bcaring walls and
columns with expansion joints. Floor slab conuol joints should be used to reduce
danage due to shrinkage cracking. A rninimum 4 inch thick laycr of free-draining
gravel should underlie intcrior slabs to facilitate rlrainage.
H.P GEOTECH
P.AA/t6?-16-?AAA t4tz2 H-P GEOTECH
-4-
UNDERDRATN SYSTEM
Free water was encountered at relatively shallow depths in the exploratory
and water levels will likely be shallower during spring runoff and rise of the river.
underdrain Sysrem should be provided to protect below-grade building construction
wherc a graviry outler is feasible. The drains shoul.d consist of drainpipe surrounded
above the invert level with free-draining grauular material. The drain should be placed
at leasr 1 foot below lowest adjacent finish grade and sloped at a minimum 170 to a
suitable gravity outlet. Uuderlrains should not be ueeded for slab-on-grade
construction placed at or above the surrounding grade.
SITE GRADING
We assume cut and fill depths for the building pads, driveway access aud ponds
or lagoons will not excced about 10 t'eet. Excavations into thc groundwater levcl could
be difficult to dewater. Strucnrral fills should be compacted to at least95Vo of the
maximum standard Procior density near optimum moisture content. Prior to fill
placement, the subgrade should be carefully prepared by removing all vegetation,
topsoil and existing fill and compactitrg the subgrade. The upper ratural fine-grained
soils could be wer and require drying to achieve adequate compaction. Thc on-site soils
excluding oversized rock and topsoil should be suitable for use in embankment fllls.
SURFACE DRAINAGE
The grading plan for the development should conside( runoff ftom uphill sourc€s
tfuough the project and runoff generated on-site. Water should not be atlowed to pond
which could impact slope stability and foundations. Exterior backfill should be well
compacted and have a positive slope away from buildings for a distance of l0 feet'
Roof downspouts and drains should discharge well beyond the limits of alt backfill.
LIMITATIONS
This study has been conductecl according to generally accepted geotcchnical
engineering principles and practices in this area at this dme. We make no warranty
either expressed or implied. The conclusions and recommendations submined in this
Pits,
,AN
H.P GEOTECH
P.A9/t6-16-?AAA L4t@2 H_P GEOTECH
-5-
reporr are based upon the data obtained from the exploratory pits located as shown on
Fig. 1, the assumed type of construction and our experience in the area. Our findings
include interpolation and extrapolatiou of the subsurface conditions identified at the
exploratory pits and variations in the subsurface conditions may not become evident
until excavation is performed. If conditions encountered during consruction appear
different from those described h this report, we shoulcl be notified so that re-evaluation
of the recommendations may be made.
This report has been prepared for the exclusive use by our clieut for planning
and preliminary dcsign pruposcs. Wc are not responsible for techdcal interpretations
by others of our information. As the project evolves, we should provide continued
consultation, conduct additional evaluations and review aud monitor thc implemcntation
of our recommendations. Significant clesigu changes may require additional analysis or
modifications to the recommendations presented herein. We recommend on-sitc
observation of excavations and foundation bearing strata and testing of structural flIl by
a rcprcssntative of the geotechnical engineer'
Respectfully Submitted,
HEPWORTH . PAWLAK GEOTECHNTCAL, INC.
Steven L. Pawlak, P.E.
Reviewed By:
Daniel E. Hardin, P,E.
SLP/rso
cc: Schmeuser Gordon Meyer - Attn: Louis Meyet
Beattie and Chadwick, Attorneys - Attn: Steve Beaftie
NeR-15-2AAZ t4tO?H-P GEOTECH P.LA/t6
APPROXIMATE SCALE1'= 200'
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GEOTECHNICAL. INC.
P.t1,/L6NRR-16-2AAA t4tA2
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LOGS OF EXPLORATORY PITSHEPWORTH _ PAWLAK
GEOTECHN]CAL, INC.1o,0 222
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P,t2/t6NRR-16-2AAA t4.43 H-P GEOTECH
LECEND:
MANPLACED flLL; clopy silty eond with scottered grovel ond occosionsl cobblea ond boulders'
F ropsolL; orgonic rondy silt, occosionol grovcl. soft. dork brown.H
SAN0 AND SILT (SM-ML); strotified, cloyey, grovelly zones' loose, rery moist' brown' Somc
orgonlcs.
G-RA\|EL, COBBLES AND BOULDERS (GM-GP): sondv. slightlv silty. medium dense to dense' moist
to wet with depth, rounded rock-
F 2' Diomster hond driwn liner somple.
I I Dicturbed bulk somplo.
f-r
=
Free wotcr lsvcl in pit of time of excovoting.
lndicoter dottcd PVC pipe ingtolled in pit to dcpth Bhown'
NOIES:
1. Explorotory pita wore excovoted on Morch 2, 2OO0 with o b6ckhoe.
2. Locotione of cxplorotory pits wsrs meosured opproximotely by poclng from feoturcs
on the aite Plon Provided.
J. Elcvotionr of thc explorotory plts were obtsinsd by Interpolotion betwccn contours on thc
site plon provided to ue.
4. The explorotory pit locotlone ond elevotions should be considercd occurote only to the dcaree
implied by the method used.
S. The lines between moteriolE shown on the explorotory pit logs reprssent the opprorlmote
boundories between moteriol tlpes ond tronsitlons moy be groduol.
6. trvotar lewl reodinEs shoun on the logs were m6dc of the time ond undcr the conditions indicotcd'
Fluctuotlons ln woter levcl moy occur with time'
7. Loborotory Tertlng Results:
t{C = Wotcr Content ( Z ) tl = Liquid Lirnit ( Z. )-
oo = ory ocnsiti-i-plf'i' Pl = Plciatlctty tnd6x ( x )
+4 = Perccnt retolned on No. 4 eicvc
-2OO - Pcrccnt poasinq No. 2O0 slcvc
LEGEND AND NOTESHEFWORTH - PAWLAK
GEOTECHNICAL, INC.
P.L3/L6\R-16-2AAA L1.43
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H-P GEOTECH
Moisture Contcnt : 12.+ Percent
Dry DensitY = 109 Pcf
Somple oft SondY Silt ond CloY
From: Pit I ot 2.5 Feet
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EXHIBIT I
Detailed description of selected alternatives including legal description of the site' treatment
system description, design capacities, and operational staffing needs'
see Exhibit B and Exhibit c for detailed description of selected alternatives and
treatment system descriptions. The Town of Silt has elected to build, as a Phase I facility'
a 75O,O0O gpd plant. A second (Phase ll) 75O,OOO gpd plant can be added in the future
when actual flows trigger the need for construction of an expanded facility. A map showing
the legal description of the site is attached under this tab.
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Aero-Mod@
Wastewater Treatm ent P I ant P roposa/
for
SiIt, Colorado
for
Schmueser Gordon Meyer, lnc.
Biologicol Woslewoter
Systems Division
Woterlink Aero-Mod@
7927 U,S. Highwoy 24
Monhotton, Konsos 66502
Phone: (785) 537'4995
Fox: (785) 537-08.l3
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o
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o
I
3i.
Waterlink Aero-Mod
Wastewater Treatm ent P lant P roposa/
for
Silt, Colorado
for
Schmueser Gordon Meyer, lnc.
Contents
Aero-Mod Brochure
ClarAtor Clarifier Brochure
SR Diffuser Brochure
SEQUOX Brochure
Monobelt Brochure
Equipment and Services Cost Estimate
Monobelt Cost Estimate
Tankage and Equipment Layout
Design Memo
Activated Sludge Design Calculations
Aeration Design Calculations
Clarifier Design Calculations
Tankage Design Calculations
Effluent Flow Regulation System
Side Line Surge Tank Description
March 30, 2000I
'.XAERLIK
Aero-Mod
offers
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bilingual personnel exclusively dedicated to
serving Mexico, Central and South America.
In the early 90's, Aero-Mod recognized the
advantages of anti-corrosive materials and pio-
neered the fabrication of wastewater equipment
in 304 stainless steel. Use of these materials has
significantly reduced the need for maintenance
and replacement of component parts. This
redesign also resulted in modular units which
allows shipping on standard trucks and in ocean
containers.
In 1996, Aero-Mod became a part of t
Waterlink family of companies. Waterlink is
international provider of integrated water puri
cation and wastewater treatment solutions, off,
ing equipment, systems, and services throughr
the world through a network of operating comJ
nies and more than 250 independent sai
organizations.
The Waterlink association has allowed Aer
Mod to expand its solutions even further
incorporating the expertise and equipment of
sister companies. Some of the examples
processes and equipment that are available frc
either Aero-Mod or its sister companies are
follows:
PhysicaUchemical pretreatment
Dissolved air flotation
Screening
Biological treatment, aerobic ana anali
Biological nutrient removal*
Innovative high performance clarifiersx
Sludge dewatering by:
Bag dewatering'.
Belt filter presses*
Plate and frame presses
Decanter centrifuges
Tertiary filtration*
Reverse osmosis for water recycling
Contract operationsx
Aero-ModMaterlink:
. Single source responsibility
. Tlrn-key solutions
. Nearly 20 years experience
. Patented equipment and processes
. Modern office, lab, and factory
. Bilingual support staff
. Experienced and supportive staff
7927 US Highway 24
Manhattan, Kansas 66502, USA
www.aeromod.com
Tel: (785) 537-499
Fax: (785) 537-081
Email : aeromod @ waterlink.cor
Aero-Mod lnc.
IfiITreRLIM
Aero-Mod
'fiAreRLIK
Aero-Mod
Wastewater Treatment
lnnovative processes and equipmen:
THE CLARATOR@
The Ultimate in
ClarAtor' clarifier technology is the latest in
patented clarifier innovation. It features no mov-
ing parts below the water, a uniform distribution
of the influent and collection of the effluent, and
the ability to regulate the effluent flow rate. It is
applicable to both municipal and industrial
biological wastewater treatment plants.
The clarifier equipment is installed into concrete
tankage, utilizing common wall aeration basin
construction. With no moving parts, the equip-
ment consists of stainless steel components, PVC
piping, and aluminum handrail and walkways.
Most often, the only attention required is period-
ic cleaning of the walkways and effluent dis-
charge weirs. With no mechanical equipment,
mechanical maintenance is eliminated.
Influent to the clarifier is drawn from the surface
of the aeration basin through inlet screens and dis-
tributed uniformly across the lower portion of the
clarifier. Settling occurs under ideal conditions as
there are no moving scrapers in the clarifier. The
unifcrm distribution and collection reduces the
possibility of hydraulic short circuiting.
Clarifier Technology
Settled solids are removed rapidly from the b
tom of the clarifier via stationary hydraulic sr
tion hoods which are evenly spaced across
floor of the clarifier. Air lifts attached to the tr
of these hydraulic hoods provide the suction
required for rapid sludge removal. Airlifts op
ate by an automatic timer control to regulate r
return rate. The return activated sludge is airl;
ed into a trough on the ClarAtor and discharg
back to the selector/aeration tank.
Submerged weirs draw effluent evenly frr
across the clarifier surface and discharge throu
a patented effluent flow regulation system.
With no moving parts and common wall ct
struction, the complete treatment plant fits ir
rectangular configuration, greatly reducing yl
piping, electrical runs, transfer pump statio
and plant area. The resultant construction c,
ClarAtor:
. No moving parts below water
. No motors, gears, or electrical componenh
. No field welding or painting
. Uniform influent distribution
. Uniform eflluent collection
. Minimal maintenance
. Rapid and positive sludge withdrawal
. Effluent flow regulation
savings are significant.
7927 US Highway 24
Manhattan, Kansas 66502, USA
www.aeromod.com
Tel: (785) 537-49(
Fax: (785) 537-08-
Email: aeromod @ waterlink.co
Aero-Mod lnc.
=fiAreRLIH
Aero-Mod
SR Diffuser
Access
IG
l*'***
I 1td'
IfiAiERLIK
Aero-Mod
Wastewater Treatment
lnnovative processes and equipment
THE SR (slide rai!) DIFFUSER ACCESS
An Easy Diffuser
The SR Diffuser Access system is a patented
system that provides simple access to the aera-
tion diffusers within a tank. The system has
applications such as: aeration, liquid pumping
via nozzles (i.e. chemical solution injection), and
mixing with either air or liquid.
Diffusers can be
brought out of the
tank by sliding the
Drop Pipe up the
SS Guide Rail.
Access System
Isolation and air control are provided by a b
valve on each assembly. Removal is achieved
loosening a stainless steel union and lifting
the lightweight assembly on guides. Rigidity
provided by a permanently mounted slide rail
stainless steel, firmly bolted to the tank wall a
floor. Since all equipment below the water st
face is stainless steel and permanently mount€
there is no need to drain the tanks I
maintenance.
Diffuser inspection is easily accomplished wir
out draining the tanks, turning off the blowers,
using a hoist. Diffuser cleaning and maintenan
can be performed without affecting the operati
of the treatment plant or shutting off oth
diffuser assemblies.
Typical installations include the tubular type
coarse or fine bubble diffusers. From two to s
diffusers are usually mounted to a commlli
rail system.
Installations can include new construction
retrofits to existing mixing or aeration basir
Systems can be designed for "wet installation"
retrofit applications with all hardware mount(
above the water level.
SR DIFFUSER ACCESS:
. Lightweight diffuser
. Easy access
.Individual isolation and control
. Suitable for "wet" retrofits
. Non-corrodible materials
. Connect to new or existing air pipes
7927 US Highway 24
Manhattan, Kansas 66502, USA
www.aeromod.com
Tel: (785) 537-499
Fax: (785) 537-081
Email: aeromod @ waterlink.cor
Aero-Mod lnc.
*DA
,1J
I
'fiAreRLIM
Aero-Mod
!*"
.fiATERLTK
Aero-Mod
Wastewater Treatment
lnnovative processes and equipmen
SEQUOX"
Biological Nutrient Removal
The SEQUOXTM biolo-sical nutrient removal
process is a patented process and the latest inno-
vation fbr biological nutrient removal of nitrogen
and phosphorus tiom wastewater. The SEeUOX
is a batch reacting process with continuous
inflow and clarification.
Flow enters into a selector tank where the raw
sewage is combined with returned settled bio-
mass from the clarifiers. This mixture then flows
into a continuously aerated first stage aeration
basin where adequate rerention time is provided
to achieve BOD and ammonia removal.
The mixture then enters the clarifier where
biomass is settled and hydraulically returned
the selector tank. The clarified effluent is wi
drawn. Most of the electrical energy (by
blowers) required to oxidize the ammonia nit
gen to nitrate nitrogen is reclaimed when the b,
teria use the chemical oxygen of nitrates, inste
of blower air, during denitrification. In additir
this reaction reclaims alkalinity, which elimina
the need to add alkalinity by chemical additiol
Natural biological reactions are controlled wi
in the tanks by sequencing the air and mixi
cycles. This is p
formed with siml
timers and controls a
not by extensive co
puters and valves.
The SEQUOX proct
results in sufficfRr
cess lmprovements a
energy savings to ma
it cost effective, even
nutrient removal is r
the primary objective
SEQUOX PROCESS:
. Reduced energy requirements
. Biological nutrient removal
. Low levels of effluent N and P
. Selector tank to promote rapid settling
. Elimination of most chemical feed
. Allows batch withdrawal for high flow
. Dedicated nitrification tank
. Sequencing without stopping blowers
. Batch reaction, continuous withdrawal
. Simple operation, minimal valves
. No computer require
The flow then naturally splits into two second
stage aeration basins, which operate in parallel.
In the "off'tank, the biomass settles and the now
concentrated biomass rapidly progresses from
anoxic to anaerobic. The latter condition
enhances phosphorus uptake upon re-aeration.
At the end of the "off' cycle the tanks are
sequenced. The oxygen depleted biomass is now
incorporated into the nitrate laden liquid above,
with the bacteria using the nitrates for their
organic source. During re-aeration, additional
BOD removal and nitrification continues. The
cycle is repeated several times as the liquid mass
progresses through the tank to the clarifier.
Denitrification
Sequencing Second Stage A.ration
1\
First Stage 1
Aeration Nitrif ication
DonitTification
Sequencing Second Stage Aerataon
7927 US Highway 24
Manhattan, Kansas 66502, USA
www.aeromod.com
Tel: (785) 537-49s
Fax: (785) 537-081
Email: aeromod @ waterlink.cor
Aero-Mod lnc.
.fiAreRLIK
Aero-Mod
II.MONOBEI
.--cr- - r
simple to operate, dewate
befit press.
MONOBElT'"
IfrAMRLTFK
Aero-Mod
Wastewater Treatment
lnnovative processes and equipmen
MONOBELT"'
Belt Filter Press Solids Dewatering
Marketed exclusively in North, Central, and
South America by Aero-Mod, the Teknofanghi
MonobeltrM belt filter press is an entirely new
design. The Monobelt combines a sludge pre-
thickener and a sludge belt filter press into one
unit, eliminating the need for two separate pieces
of equipment in a sludge dewatering operation.
This is done with few moving parts, keeping the
design and maintenance simple.
A rotary pre-thickener performs the initial
solid/liquid phase separation, increasing sludge
solids concentration from l-37o to 7-l5Vo
Following pre-thickening, the belt press section
of the Monobelt further removes water from the
sludge by uniformly spreading it onto a filter
cloth via a series of baffles to promote further
gravity dewatering.
Final dewatering occurs as the sludge is pressed
between the belt cloth and a hollow perforated
cylinder covered with filter cloth. During this
final step in the dewatering process, the dis-
charged sludge cake reaches a solids concentra-
tion of 15 to 25Vo. Dewatering percentages may
vary based on sludge characteristics. A blade
scrapes the sludge from the belt and the endless
belt returns through a high pressure wash section
to be cleaned before reaching the beginning
this continuous operation. A unique, rotary dr:
thickener may be purchased separately for thi,
ening prior to liquid hauling, anaerobic dig
tion, or for subsequent sludge treatment optir
where full dewatering is not desired.
The alignment and tension of the belt are au
matically controlled using pneumatic actuatc
Additionally, the main control panel provir
automatic operation of the sludge pump a
chemical dosing subsystems within the machi.
Sensors monitor the operation of the system a
send signals to halt operation in the event o
malfunction. In keeping with the high qua,
standards of Aero-Mod, the machines are mar
factured in 304 stainless steel. The 1.2 meter b
width is standard to allow for rapid shipment.
MONOBELT
. Simplicity
. Performance
. Stainless steel
. Compact design
. Packaged solution
. Pre-thickening
. Economical solution
*MONOBELI is a trade mark of TEKNOFANGHI of
Milan, Italy
7927 US Highway 24
Manhattan, Kansas 66502, USA
www.aeromod.com
Tel: (785) s37-49s
Fax: (785) 537-081
Email: aeromod @ waterlink.cor
Aero-Mod lnc.
AERO-MOD,lnc.
EQUIPMENT AND SERVICES COST ESTIMATE
Project: Silt, Colorad o Date:
Enjineer: Schmueser Gordon Meyer, lnc. Units:
EQUIPMENT SUPPLIED
Aero-Mod Split-ClarAtor Clarifiers - 960 sf each
Aeration blowers, 75 HP -2015 icfm each (includes controls)
Split-ClarAtor control panel, Model SCC-200
Wall mounted aeration assemblies, 1st Stage, ModelWA-PS4
Wallmounted aeration assemblies' 2nd Stage, ModelWA-PS4
Digester wall mounted aeration assemblies, Model WAD-PS4
Selector tank mixing assembly, ModelWAD-HS2
Solids Wasting Air Lift PumPs
SEQUOX Valves, Slide gates, controls
Wallmounted walkwaY & handrail, LF
lnstallation materials, brackets, inserts, freight' misc.
BUDGET EQUIPMENT COST
ESTI M ATED I N ST A LLATIOA' COST
ESTIMATED CONCRETE TANKCOST
Est. Vol. of Concrete for Slab & Clarifier Bottoms' cy
lnstalled Concrete Cost, $/cY
Est. Vol. of Concrete for Walls, cY
lnstalled Concrete Cost, $/cY
*Total Estimated Cost
*Buildings, site work, and auxitiary equipment are not included within this estimate.
'This estimate is valid for 90 days from the above date.
30-Mar-00
English
2
3
1
44
M
24
4
2
LS
490
LS
$745,000
s135,000
$685,000
1,006
$3s0
832
$400
$1,565,000
MONOBELT
wATERLtfu x aeno-MoD tNc-
Project: Silt, Colorado
Engineer: Schmueser Gordon Meyer, lnc'
Monobett Model Used: NP12
30-Mar-00
English
SLUDGE CONDITIONS
Volume of Sludge
Solids Concentration of Feed Sludge
Solids to Dewater
EQUIPMENT SIZING & SELECTION
Selected Model
Number of Belt Filter Presses Used
Selected Polymer Feed SYstem
Number of Rotary Thickners Used
Maximum Feed Rate
Dry Solids Rate
Projected Operational Time Period
Projected Operational Days Required per Month
PLANT CONDITIONS:
lnfluent BOD
MLSS
lnfluent Plant Flow
Note: *DM = Dry Matter (solids).
5,578 gallons/day
1.50% % DM*
698 Ibs/day
NP12
1
DYB-1.0D
1
40
300
6.0
12
$105,000
gpm
lbs/hr"
hours
250 mg/l
3,588 mg/l
0.7s0 MGD
Date:
Units:
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WASTEWATER TREATMENT PLANT DES'GN MEMO
O lntroduction
The purpose of this design memorandum is to outline the treatment solution for the Silt, Colorado
WWTP using the SEQUOX activated sludge process. Average influent characteristics include a
design average flow rate of 0.750 MGD and BOD'/TSS/NH3-N concentration levels on average of
Z5Ot25Ol25 mg/t, respectively. Effluent concentrations for BOD./TSS/NHr-N/Total N of 151151111O
mg/;, respectively can be expected in the effluent. Hydraulic peaking factors have been assumed at
3:1 for an hourly peak and 2:1 tor the sustained peak flow.
The footprint of the plant is rectangular in shape and has an overall dimension of around 102' by
150' by 16' deep. Within the boundary of the dual-train plant, the tankage (all common wall) is as
foltows: One (1) selectortank, two (2) Split-ClarAtor clarifiers, two (2) first stage aeration basins, two
(2) second stage aeration basins and two (2) aerobic digesters. The layout shows the proposed
tankage configuration.
There are three (3) unique features of the proposed plant. First, patented clarifier equipment
fabricated of stainless steel, havino no movino parts below the water, and has the ability to regulate
the effluent flow rate. Second, a patented guide rail assisted diffuser access system that allows
access to the air ditfusers without tuming otf blowers or draining any of the tanks/basins, and that
can be accessed without the use of mechanical hoists. Third, the SEQUOX process, which offers
sequential reactions with a controlled, continuous clarifier. The proposed design is easy to expand,
minimizes yard piping and provides 5 inches of in-basin surge storage. The end result is an
operator friendly plant with long term reliability and minimal maintenance.
Under average conditions and at full loading, the plant is designed to operate with a mixed liquor
concentration IfUUSS) of 3600 mg/l and a sludge age of 22 days at 5 degrees C. The proposed
SEQUOX process provides excellent waste degradation while incorporating a continuous flow
through nitrification stage followed by sequential aeration in a second stage (outboard tanks) to
prom6te nitrogen removal. A typical SEQUOX cycle would be about 2 hours on and 2 hours off in
ihe outboard ieration tanks. (See brochure) This controls the activated sludge process and
provides conditions for denitrification, as well as reduces energy costs as oxygen is taken up by the
bacteria from the nitrates during the air off cycle. Total nitrogen from the plant should be around 10
mg/l or less when operating in the SEQUOX mode.
Process FIow
The influent enters the anoxic selector tank and is combined with RAS from the clarifiers. This
mixture flows to the first stage aeration basins and is aerated to stabilize a portioti of the BOD and
NH3-N in the wastewater. From there the flow enters into the second stage aeration basins where
the air is sequenced and further reduction in BOD and NH.-N, levels occurs. The primary purpose of
the sequencing of air is to provide conditions favorable for denitrification.
After adequate detention in the aeration basins, the flow enters the Split-clarAtor clarifiers via SS
inlet screens. The flow is evenly distributed €cross the bottom of the entire clarifier with the lowest
entrance velocity in tne industry. Additionally, the etfluent is drawn off evenly across the entire
clarifier, near the top, using submerged efflu;nt collection pipes and then out a patented three weir
ftow regulation system that provides in-basin surge capacity. The submergence of the effluent
draw oif pipes enables consistent effluent quality independent of surface wind or other adverse
surface conditions. SS suction hoods and air lifts are used to remove RAS from the clarifier to be
retumed to the selector tank.
An important feature of the clarifiers is the unique means by which it is able to regulate the effluent
flow rate. Because each clarifier will have this ability, better effluent is produced by the clarifier.
Furthermore, this flow regulation system of the Split-ClarAtor technology provides 5" of surge
storage volume across th! entire aeration basin. Based upon a 3:1 hourly peak, the clarifier
calculation sheet indicates that within the plant tankage, a peak of this magrritude can be handled for
,p i" f ,5 hours without exceeding the in-basin surge itorage of the plant. This unique means of
absorbing hydraulic surges is only possible with the Split-CiarAtor clarifier and its ability to regulate
the effluent flow rate.
Plant Controls
process & plant controls are simple and will consist of three (3) main timers. They are as follows:
1. The RAS timer is a timer dial to activated on/off the RAS from the clarifier'
Z. The WAS timer is a programmable timer with Program 1 controlling the air to the
digester and program 2lontrolling the solids wasting air lift pumps.
3. The sEQUOX timer is a timer oiaithat controls air to the two (2) second stage
aeration basins.
With these simple timers, remote operation is simple and does not require 24 hour attention by an
op"i"iot. These timers can be incorporated into a PLC control panel'
Sotids Wasting
To maintain the biological processes within the system, solids are wasted from either the first stage
aeration basin or trori "n
wRs pit to tne to the pioposed aerobic srudge digester. on a daily..
basis, sludge wasting occurs in foltowing manner. Typically, the air is tumed off for a period of time
in the digester to allow setiling. Then, .-otior are waiied vii air lifts from the first stage aeration
basin into the digester and clear supematant is retumed to the plant' Using this procest' 1!"
aig;rtii*i1 u" iot" to reach a solids rever is hight as 1.5%. This level can be maintained by
periodically wasting sludge from the oigliieito t-he ultimate sludge handling facility. The size of the
aerobic digester can be readily revisedto provide the-rlesired sludge storage capaci$' The
proposed digester will have a iluoge "g" in excess of 60 days under full loading conditions'
Solids Dewatering
The MONOBELT solids dewatering system is offered as an option for dewatering the sludge
produced bY the Plant.
Aeration
stainress steer coarse bubbre diffusers are proposed. Ail diffusers are mounted on Aero-Mod's
patented diffuser r"""i, system, maring iJneiureo maintenance simpre and quick to complete'
The browers proposed wiil most rikery be"high efficiency positive dispracement blowers. At the
owne/s preference, fine bubbte memOran""Jifrt"rs cin be provided if deemed best for the client'
500, above sea level has been taken into account in sizing the blowers'
a.
b.
c.
d.
2.
3.
Aeration Basin
Digester
SS Coarse Bubbte
81.1
36.1
As part of our process in providing a custom designed solution, Waterlink Aero-Mod offers the
following services:
1. once a final layout is determined, wall thickness of the tankage, and.the grade elevation of
sunounding the plant is set, *. otr"t cAD drawings of the complete layout and details
associated with the plant including:
e. EquiPment details
f. Cdnirete details (without rebar requirements)
we assist the contractor during construction and offer at the contractors option, a
construction supervisor at the t-ime of equipment instaflation. Arl the concrete tankage is to
be complete prior to the equipment "tnJ.i on-site. Once on site, the contractor has no field
welding or coating to perform, and instaffalion involves bolting and setting equipmenUpiping
H,ijiil"" operator of every new sEeUoX plant receives as part of the sale 2-3 davs of
of"t"iot training at our facilities in Manhattan' Kansas'
lnsert locations
Notch locations
Piping laYout
Pneumatic control laYout
Nutrient removal caPabilities
Low maintenance on clarifier - no moving parts
Ease of accessing/maintaining diffusers
No welding or painting associated with system
Filamentous bacterial growths discouraged
Built-in surge caPacitY
Oxygen recovery/energy savings
Sirifi"ity by design for space efficient expansion
Proven performance and experience
Manufacturer operator school to train operators how to manage their SEQUOX process
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Advantages of Proposed SEQUOX System
AERO-MOD, lnc.
Project: Silt' Colorado
Engineer: Schmueser Gordon Meyer' lnc'
eci. luage Process; SEQUOX
15.0
93.8
30-Mar-00
English
lnfluent
0.750
250
1,564
366
250
1,564
25
156
Effluent
Flow, MGD
BODS, mgil
BOD5, lbs/daY
BODL, mg/l
TSS, mg/l
TSS, lbslday
Ammonia-N, mg/l
Ammonia-N, lbs/daY
Retention Time, hours
Aeration Tank Volume, Mgal
Sludge Age, daYs
Mixed Liquor TemP., Degrees C
15.0
93.8
1.0
b.J
28.0
0.875
22.0
5
40.0
15.000
1.50%
Aerobic Digester
Volume, % of Aeration Tank
Maximum MLSS, mg/l
Maximum MLSS' %
Mixed Liquor Suspended Solids' mg/l
Mixed Liquor Volatile Suspended Solids, %
F/M Ratio, lbs BODS/lb MLVSS
F/M Ratio, lbs BODS/lb MLSS
Organic Loading, lbs BOD5/1000 cf of tanUday
O{gen Requirements (Carbonaceous), mg/l/hr
Oxy6en Requirements (Nitrogenous), mg/l/hr
MLSS Wasted Per DaY' lbs/daY
MLSS Wasted Per DaY, gallons/daY
Volatile Solids Reduction in Digester, %
Solids Wasted from Digester, lbs/day
Volume Wasted from Digester, gallonsiday
Digester Sludge Age, days (w/ VS Destruction)
Aii Required for Stabilization, cfm
nit R"quir"d for Mixing (@20 scfm/1000 cf)' scfm
3,588
73.0
0.08
0.06
13.4
7.23
3.94
1,096
36,637
49.8
698
5578
63
211
936
Date:
Units:
AERO.MOD
AERATIO N DES'GN CALCU I_ATIO N S
Project: Silt.Colorado
Engineer: Schmueser Gordon Meyer' lnc'
iiiiiitii Type ltsed: Stainless Steel Coarse Bubble Diffusers
AERANON AAS'N
0.750
250
1,sfl
0.10
366
Orygen Required for BOD Reduction IMGD'mg/l '8'34' 1 21' lbs O2lday
Oxygen Required for BOD Reduction' lbs O2lhr
Orygen Req'd for NH3-N Reduction IMGD'IS{l'4'6 - 8'341' lbs OZday
Oxygen Required for Ammonia Reduction' lbs O2lhr
Actual Orygen Requirement (AOR)' lbs O2lhr
Where: AOR Actual Oxygen Requirement
C'st Actual Value of D O Saturatton
C'20 Steady State Value of D'O' Saturation
Alpha Assumed for Domestic Wastewater
Theta Orygen Transfer Coefficient
T Teniperature of Water' Degrees C -^-Tau Orygen Saturation Value [C'sUC's201
Beta Asiumed for Domestic Wastewater
Omega Omega [Pb/Ps]C Dissolved OxYgen Concentration
Standard Oxygen Transfer Rate (SOTR)' lbs O2lhr
tAoR'c'26'liipn";rneta"F-io)'(Tlu'omega'Beta'c'20-c)l
Oxygen Density (Amount of Orygen per ft3 of Air)' lbs OZft3
Transfer em"iJ"Urot seeaei 6iffusers per Foot of Submergence' %
Diffuser Depth Below Water Surface
Aeration Requirement TSOTR / Orygen Density'SOTEI' ft3 airlhr
Aeration Requirement
Reclaimed from Denitrification (50% assumed)
Total Aeration Required in Aeration Basin
AIRREQUIREMENTS Assumed air temPerature' F
Assumed elevation
Minimum Air Required for Mixing
Flow. MGD
BODS. mg/l
BODS,lbs/daY
BOD Rate, K
BODL, mg/l
TSS. mg/l
TSS, lbs/daY
SS, lnorganic' mgll
Ammonia-N, mg/l
Ammonia-N, lbs/daY
30-Mar-00
English
936
40
250
1,564
38
25
156
936
40
Date:
Units:
1,877
78.2
719
30.0
108.2
108.2
12.8
9.1
0.70
1.024
5
'1.40
0.95
0.816
2.0
254.o
0.0'17480
0.85%
12.50
136,743
2,279
3'16
1,963
100
5,500
1,757
Aeration Basin
Aerobic Digester
Selector Tank
Clarifier
Aeration Pressure, lnches of water
Psi std
H O RS EP OWER REQ U I REMENT S
96 96@
3'620Total Air Required
Total Air SuPPlied
170
6.1
Est. Operating Requirements for Aeration & Clarification' HP
Eti. Ob"t"ting Requirements for Aerobic Digestion' HP
Est Total HP Requirements
81.1
AERO'lllOD, lnc'
CLARI FI ER DESI G N C ALCU LATI O N S
Date:
Units:Project: Silt, Colorado
Engineer: Schmueser Gordon Meyer, lnc'
CtirifierTypeused; Split-ClarAtor
FLOW CONDITIONS
30-Mar-00
English
Number of Clarifiers
Clarifier Unit Model
Clarifier Unit Length, ft
Ctarifier Unit Width, ft
Number of Units Per Clarifier
SITRFACE OVERFLOW RATE
Design Flow, gPd/sf
Max. DailY Flow, gPd/sf
Max FlowAlloweJ Through Clarifier' gpd/sf
WEIR OVERFLOW RATE
Design Flow, gPd/lin' ft
Maximum Flow, gPd/lin' ft
SOLIDS LOADING RATE
Design Flow, lbs/daY/sf
Maximum Flow, lbs/daY/sf
RETENflON NME
Design Flow, hr
Maximum Flow, hr
Design Flow, MGD
Peaking Factor, Wet Weather
Duration, min
Peaking Factor, Max. DailY Dry
Aeration Tank Volume, Mgal
MLSS, mg/l
Avg. RAS RecYcle Rate' %
2.250
1.728
93,750
72,000
363
2 Surface Area Per Clarifier' sf
24Ei8O Totalsurface Area, sf
24 TotalWeir Length, ft
20 Tank Wall DePth, ft
2 Tank Water DePth, ft
Desion
391
781
900
4,167
9,600
0.750
3.0
60
2.0
0.875
3,588
100%
Vol. of ln-Basin Surge Storage, gal
Vol. of additional Surge Storage
required, gal
Capacity of Surge Storage' hrs
960
't,920
180
16.0
14.0
23.4
38.6
6.4
2.8
Peak Flow, MGD HourlY
Max. Flow Through Clarifier, MGD
Vol. of Peak Flow entering plant, gal
Vol. of Flow exiting Plant, gal
Excess Peak Flow' gPm
33,241
(1 1 ,4e1)
1.5
AERO-MOD, lnc.
Project: Silt, Colorado
Engineer: Schmueser Gordon Meyer, lnc'
TaikConstruction: Cast-in-PlaceConcrete
SELECTOR TANK
Date: 30-Mar-00
Units: English
Number of Tanks
Tank Wall Height, ft
Tank Water DePth, ft
Freeboard, ft
AERATION TANK
Tank Wall Height, ft
Tank Water DePth, ft
Volume Required, gal 875,000
Staoe 7
-N-umb-er of Tanks 2
Tank Width, ft
Tank Length, ft
TotalVolume, gallons
Retention Time (Design + RAS), hr
Number of Trains
Number of Stages
Tank Width, ft
Tank Length, ft
TotalVolume, gallons
WallThickness, in
Floor Thickness, in
Total Concrete for slab' cY
Total Concrete for walls, cY
Staoe 2
ffioer otTant<s 2
Tank Length, ft
Tank Width, ft
Area of Each Tank, sf 2,152
TotalVolume, gallons 450'663
882,318
48.88
33.0
349,865
40.0
24.0
201,062
I
16.0
14.0
2.0
16.0
14.0
72.00
28.63
2,061
/til1,656
8.0
40.0
33,510
0.5
1
2
Tank Length, ft
Tank Width, ft
Area of Each Tank, sf
TotalVolume, gallons
113.3
19.00
Total Volume Provided, gal
aERoB,c DIGESTER TANK Volume Required, gal 350,000
Tank Width, ft
Tank Length, ft
TotalVolume, gallons
Number of Tanks
Tank Wall Height' ft
Tank Water DePth, ft
CLARIFIER TANK
Number of Tanks
Tank Wall Height, ft
Tank Water DePth, ft
Total Length, ft
TotalWidth, fi
TotalArea, sf
TotalWall Length, lin. ft
2
16.0
14.5
2
16.0
14.0
150.00
101.5
15,225
1,070
15.0
15.0
1,006
832
Aero-Mod ClorAtorffi
Aero-Modo
ClorAtor@ Clorifier TechnologY
Peak flows occur in most treatment plans' Typical
competitive wasrcwater treatment plans without flow
equalizauon tend to pass solids in their clarified effluent
during Peak flows.
The Waterlink Aero-Mod patented built-in surge control
equipment is the ideal solution for processing motlerate
peak flows. Hydraulic surge control (flow equaliadon or
peak dampening) is accomplished by tnple weir devices
located inside the effluent boxes in the ClarAtof (see
below). Triple weir devices control the rate at which the
clarifier compartsnent will pass effluent and are not
affected by high influent flows. [n other words' the
upward velocity in the clarifier can be "capped" with tbe
ClarAtor clarifier.
When a peak flow occurs. ttre excess quantity of
rncoming wastewater is conveniently sored in the
Slde Vlew of ClorAtor Clorlfler
(1oc)THIRDWEIR
SIIVING GATE
(10a) FIRSTWEIR
FLOW BOX
(1Ob)SECONDWEIR -
(sillNc GATE ORIFICE)
End Vlew TdPle Welr Devlce
aeration unk within a designed freeboard' This peak
storage delays the processing of a portion of tbe MLSS
by the clarifier, altowing the effluent flow rate to be
controlled below the maximum design SOR'
GI.ARIFIERFLowREGUI-ATIoNSYSTEM
The first weir (item 10a) sets a
minimum level for the ClarAor
and fteelY Pass€s effluent flow'
The second weir (ircm 10b) is a
submerged orifrce and freelY
passes anY flow until the rated
capacity is aPPmached At that
poinL the first weir becomes
submerged. and the second weir
starts restncting effluent flow
'\r+ \-\
\ /-\\lrtt'rli'I
Blologicol Wott wai" SytftilrE DlvFlon
Aero-Modosystems.rg2Tu.s.Htghwoy24,Monhotton,Konsos66so2'Phone:(785)537-4995'Fox:(785)537{813
www.woterllnl(.com' E-moll: oelomod@wotelllnk'com
Aero-Mod ClorAtor
Ta v--t! J-t:,r-'-rfi,t Eflt-a'r rr.
Aero-Modo
ClorAtor@ Clorifier TechnologY
taking over control so that the maximum SOR is not
exceeded. lf a prolonged or abnormal high intluent
occurs, a maximum level in the plant may be reached' At
this point the third weir (item tOc) would allow a poruon
of effluent to overflow and bypass the frrst two weirs
avoiding further storage. ln most cases' the SEQUOX"-
IIF system would activate to process these flows'
keeping the clarifier from being overloaded and going
over the third or high level weir. When the influent tlow
rate subsides enough to drop the ptant level below is
maximum. the remaining storcd "surge MLSS" is
processed at a norural SOR rate' The Aem-Mod surge
control system danpens high diumal flow peaks
and lift station surges without exceeding
the maximum clarifier SOR. This
Effl uent Collection Launders
TWo identical, triangular cfflucnt collcction launders arc
provided for each ClarAtor upper secuon' with 5/8 inch
holcs cvenly spaccd along both of is top sidcs' Each
launder reaches Oe full length of the clarifier and
discharges into an cfiluent box'
Nodce that each launder is submerged' and is holes are
placed above the boftom of the triangle' This keeps any
rising solids. such as scum or grease' from entenng the
launder. so they can float to the surface to be picked up
by rhe skimmers. Submeryed launden also rcduce ice-
plugging problems in cold climates'
5'i
CtorAtor Elfluent Box
surge control equiPment
insures a good clear
effluent.MAX.Y.ATERLEva -r
M[.I WAIEP LEVEL
I LFREI]ONLOCK
\ roa rotsr*evr
LOd:EEtryp)
9.BTVERGED, CCNTROLLED
5Y S}TD'G GATE
Iplg;rBoxrrwt J
L errtuern ouTLEr
COT$ECION
S}\i!G GATE TYP
Blologicol Woslowcrter SFterrt DlvBlon
Phone: (785) 537-4995 ' Fox: (785) 537{61 3
Aero-MocP Sy3l6ms '
www.woterlinl(.com' E-moll: oetomod@woierlink com
EFFLUENT TAUNOER
Aero-Mod ClorAtor
-
a--? J-., -'
r.t{,|, Enin'tiffi
Superior to "V-Notch" Weir SYstems
A) Roating matcrials do not cntcr thc cffIuent collcction
system.
B) Launder leveling is not cntical for umforrr cftlucnt
collection.
C) Efflucnt collcction laundcn do not control thc plant
liquid lcvcls.
Effluent Shut-Off Device
Effluent can be shut off for normal housekeeping
opcrations or other maintenance activitics' Each cffluent
box has a simple, manually operated swing gate as
shown in rhe "EndView of Triple Weir Dcvicc" (sce
page 3-10). It is a simple device mede ftom PVC that
slides the sccond weir (swing gatc orificc, itcm lOb) ovcr
a blank plate to block effluent flow. ClarAtor sections
can be shut offindividually or in combinations for larger
plants.
Additional Features
The entire weu assembly adjuss up and down so that it
is easy to level thc clarifrcr and insurc cffluent' is evcnly
drawn off acmss the clarifier. This allows parallcl
aeration ranks to be connected hydraulically and
eliminatcs any nced for inlct stnrctures with splitting
vanes or regulating weirs.
The second weir (swing gate onfice item lOb) is a
removable, calibrated orifice that can be changed if
necessary. Generally, these orifices are sized for SOR
requiremens, according to govemment statrdards at the
plant location.
Blologlcol Wosiewsler sy.lerB Dlvlslon
Aero-Mod SYslettG . 7C27 U.S.Highwov 24. Monhotton, Konsos 66502 ' Phone: (785) 537-4995 ' Fox: (785) 537OEl3
www.wo'ierlink.com' E-moll: oeromod@woterlink com
Aero-Mod ClorAtor-r_.--.rrtll Enr-r'r rr
Aero-Modo
ClorAtor@ Clorifier TechnologY
Surge Control: Sideline Surge Storage System
The AERO-MOD Systems rlesign inherent'ly provides for
flow equalizauon within the aeration basin iself' Since
the ClarAtof's three-weir device regulates the outflow
from the clariliers' short term surges simply back up
within the plant. When the surge decreases' the regulated
clarifier output now exceeds what is coming in' and the
plant level (with the stored surge) Iowen back to the
normal operaung level' Tbis is especially etlective for
lift stauon discharges and short rcrm surges'
Tbere are times' however. when the surges are of such
dumtion that thcy cxccctl thc stomgc capacity within thc
aeration tank' At that time' as with any clarifier' a
hydraulic ovcrload could bc cxpcctctl' Thcsc typcs of
surges arc oftcn encountcrcrJ in arcas that expericncc
highly variable flows, such as schools' oftice parks and
intlustries. For these flows. some form of separate flow
equaliz.atrtln is rtquired.
Typically' flow equalization has been an in-line process'
meaning all intlow is capmred in a sepuate basin and
thcn pumpcd at a regulated rate to the treatment plant for
processing. This results in tte storage of raw sewage that
can be odorous and conrain solids and debris that either
se[le or float. If these basins are aerated' the passing of
large volumes o[ air through sewage will stnp sewer
gases to the atmosphere. often resulting in more odors
ttran if it wcrc lctt unacrated' lf lctl unacratcd or
unmixcd. thc solitls scttlc l'o thc bottttm of thc basin and
decomposs, again creating ulors and operational
problems.
By taking advantage of the in-tank llow conuol'
resulting in a variable aeration tank level' we bave
developed a means of flow equalization that cli'minatcs
most of the problems of the typical in line llow
equaiizauon method. This methul is the ALRO-MOD
sideline surge storage sysrcm'
Under this system, all raw sewage flows into thc acration
tank itr the norrral manner' Most surgc storage
requirements are handled within '5'
u"66sn tqnk
freeboard. When this is insufltcienu a portion of the
aeration basin is diverted to a "surge biuin"'
Prior to allowing the water level to exceed the high level
wetr. mixed liquor bcgins to ovcrllow a bypuss wcir into
an auxiliary sitlclinc tank' Float opcratcd surgc rcnrn
pump(s) within this sideline basin sensr: the prescncc of
mixed liquor and are acdvated m recirculate mixed
liquor back to the aeration tank during this peak flow
period. As this is rapidly pumpcd back to thc aeration
tank it. will simply mix with the exisung mixed liquor'
forcing about the seme volune back over tbe weir again
into thc sideline tank. This is tlcsirablc as it pn)duccs a
good recirculation through this wrk' keeping the solids
in suspension and the mixed tiquor in this sideline basin
freshly aerated.
Blologicol Wortowotel SYrten$ Dlvltlon
Phone: (7SS) 537-4995 ' Fox: (785) 537{8.l 3
A610-Modr SYstems '
www.wolerllnl(.com' E-moll: oeromod@)woterllnk com
Aero-Mod ClorAtor
rft'l.I Df\r-a'r rr'
Aero-Modo
ClorAtoro Clorifier lechnology
Eventually the raw sewage intlow will subside' and as
the clarificrs continuc to proccss thc mi'rcd liquor at thcu
design rate. lhe retum weir will be passing back less to
thc sitlclilc unk than thc rccirculation pumps rcturn to
the aeration tank resulting in rhe emptying of the
sidclinc tank. The overflow wcir is placcd at thc tlppositc
cnd of the rcturn pumps to assurc that cross-mixing
occurs within r.his tark. When the unk drarns down to
thc sump. thc float I'urns otr thc ptrurp(s)' and thc systcm
goss on hokJ until thc next abnormal surgc'
Advantages Over Conventional Systems
l) The surge lEturn pump rate cannot catrse a hydraulic
ovedoad of the clarifier. because the t'hree-weir orifice
system remains in conuol o[ the
clarifier ovcrfl ow ratc'
2) Since mixed liquor and not raw seiu/age
is stored, there are no potential odor
problems. and residenual type sewage
pumps can be used in lieu of non-clog
raw sewage pumps.
3) There is no requirement for auxiliar.v
surge tank aeration. because the smred
mrxed liquor remains tresh from
continuous recirculation of aerated
mixed liquor.
4) All sewage flows directly into thc acradon tank in a
normal mannor. Therc is no nccd to tr-v to rcgulatc'
split or bypass raw sewage in the plant's hcadworks'
5) Energy is saved as pumps only opcratc during exucme
surge conditions. This compares to a convcntional
system where every gallon must be pumped'
This system has been used in many AERO-MOD
installauons and has proven to be very succcssful'
Figure I below is a cross section of a typical sideline
surgc storagc systcm. Thc rncthtxl u[ sidclirtc storagc
with the three weir overtlow conuol is only capable with
bc proprietary thrcc-wcr dcvicc"
Surge Overllow
Notch
ApgG 16-
t.-' 5'AG[uon Tank
F€GEafi, St'oEgl
Mixed Liquor
Aeration Tank
6- Dap SumP
Figure 1. Cross Section of the AERO-MOD
Sideline Surge Storage SYstem
Blologacol lvo3tewqtel syslems Dlvision
A6ro-Mod& Syslems . 7927 U.S.Highwo'/ 24. lvonnotlon, Konsos60502 ' Dhone: (7E5) 537-4995 ' Fox: (785) 537t613
www wolerlrn( com ' F-moll: oeromodkr)wolerllnk'com
EXHIBIT J
Legal ar?angemonts showing control of site for the proiect life or showing the abilfi of the
entrty to acquire tha site and use it for the project life. Approval by the Dlvlsion of an
application for site approval shall not be deemed to be a determination ttut the propored
treatment works is or is not necessary, that the proposed site is or is not the bert or onty rite
upon which to locate such a troatment works, or that tocation ol a treatment worke on the
site is or is not a reasonable public use justifylng condemnation of the site. Approval by the
DMsion shall only be deemed to be a determination that the site applicadon meetr the
requirement of thlr regulatlon 22 15 CCR 1OO2-221.
The Town of Silt has purchased the Scott property for the wastewater treatment
facility. Evidence of this purchase is herein attached.
LOM!tsi&126..d!
.t..t;hl:: ','
LLUU tU, I llL.'I tuulr ! | llt|l'I[Lt ![u,Lu
I
i-;;-, i-ro.oo o 14.?5 GnRFTELo couNTY c0
TOWN OF SILT
wbsc lctd eddrs is
23I NORTH iTIl STREET, SILT, CO 81652
ofthc Couotyof GARFIELD
WITNESS. tlal lbc gatrto(s), for aod io consrdcration of thc rum of
VALUAsLE CONSIDEMTION
tba ,lccrpl s[d tu6cicocy of which is hcrcby ackoowlcdpd" bav e
do grril. bsryln' sc[, coBvtry sndcoairm unto ric ttra[trq3)'
totrlhcr wirh iDprovcmcatt tf uy, sttutq tying aod b€iu8 i! thc
.!d Stat of Colondo, dsibcd as foUovr:
the ir
rucoBsont sod Ni3!r do
RECCJVID Ii;l 2, i zCOO
and Statc of
and statc of C0L0RAD0 '
gr&ttdr):
TEN DOLI"A,RS AND OTHER GOOD AND
DOLI.ARS.
grrsrcd, bargarncd. sold ud conqrcd. rod by thcrc pn:cor
E h ter hcin rod rssigDt foraEi. dl lhc rc.l pm9Cfiy'
couilyof GARFIELD
SPECTAL }VARRANTY DEED
THrs DEED. datcd )1ARCH 17 ' 2000
bcrwn MURRILL THOMAS SCOTT AND SUE ANN SCOTT
I ofthc
i COLORADO
'Couoty of CARFIELD
, griuro(s) aod
,Jv,,\J
'a
YJr)
SEE EXIIIBIT .,.\'' ATTACIIED HERETO
AND MADE A PART HEREOF
il il;i[;;** rL", lir, ",
EheD scrves Ehelr hcin pc.oa.l rcprclcotru'c!"
cnoEGD nEmn th.IcYEr. r uc Pd.vr!.h .vi
cor"r-, ""* "J,0., Ehey shdl end will WARRANT AND FOREVERD-:"-"
rholrmbystrc.raodDumbcrs: TBD RMR FRONTACE ROAD' SILT' CO 81652
l!rc$d'3 $badulc or PaEl numbcf,
TOGE'rHER with ril rod srnguler thc hcrcdiBmcoB aDd appuncouc thcr€uoto bclonStnS' or in anywirc eppcrraiain!' tbc revtnioa
rDdrcE'llolarcoeiodcrDdrcErindrr!'rcDrs$sErudpm6u$cr€of.aod.I$cca6tc.rishrridc-iotc'!.r.clriErnddroud
wheucwr of thc !ranro(t), cltlcr iD law or cquiry of, in rod to thc rbo\rc barBtDcd prcaiscs, with tbc hcrEdrrrrcnB |!d rmrt|anlccc
TOHAVEANDTOHOLDthcsatdprcmiscs'bovcbargarocd.aoddcacrrbcd'with-thc^appurrco:1":1'-'^t]:::T::::'
ffiL:ttrf ,o ra" qrict -a pe,*blc posssroD of lhc Brutcdi), rheir hein .od assigDr' 88'i,'t rll rnd arctv
pasod (r pctloB darmi4 rhc wholc or any pan tbcrsf. by, thmugh or uudcr rhc 8railo(s)'
tN WITNESS WHEREoE thc gr.Bto(3) hav e {ccutld thL dtcd oo rhc datc tcr forrh abde'
ANN SCOTT
ll
Witncas EY hud and oficial sal'
My
.lf i! Dcrc, lM "CitY rDd'
SIATE OF COLORADO
Coultyof CARFIELD
Tbc forcSotoS, iosirumcut ws ackmwlcdScd bcforc me this
by MURRILL THOMAS SCOTT AND SUE ANN
I7T
SCOTT
riay of MARCII
Nc 15. ne +}.. sPEclA[ rvAxr^r{TY DEED
B.dh PuHitbrnS lTal wrc sr. D'G co t0202 - (303) 2'2'2'ql - ?-9t
Itililrililtil]l]il ilti]tlltilllltilt il[ il] lil
=60803 03/21/2000 09:45A Br17? p6r1 n AISOOnF2 ot 2 R 10.00 0 14.?5 GARFIELD COUNTY CO
EXHIBIT "A"
Parcel 1
A parcel of land situated in Lot 6 of Section 9' Township 6 South' Range 92 West
of the Sixth Principal M.e;ffi;,
-Garfietd County' Colorado lviry. So.ulneastarlv of
the Southerly right of w-ailil o-iinl"i"t"t" 7d' said parcel of land is mora fully
described as follows:
Beginning at the antersection point of said right-of-way line and the East line of
said Lot 6; whence tn" rtfirtn"""t comer of sala Sec-tion 9 bears: North 43"40'57"
East1884.39teet;tnenceSouth00"43'35"EastalongsaidLotline'809'28fecttoa
point on the North o""f fi"i"o"iline, being the Southesst corner of said Lot 6:
thence North 5go1S'OOji west 609.76 feet along said Meander Line;.thencc North
5oo3o'Oo' west along saiJ ueanaer Line, 235'34 feet to a point on said right of way
lina; thence, atong saiJai'tioi*"v ri""i *t$ 57o58'30" East 307'92 feet; thence
472.4sfeet along tn" "r"'"i " "u*l to the right, having a radius of 2714.789 fect'
thc chord of which o"ir"t ftfottn 66o59'13" East 471'86 feet' to the POINT OF
BEGINNING.
EXCEPTING THEREFROM A PORTION hereto conveyed to Cly-d9- H' Siever and
Lucy J. Sievers ov oeeJ iecoraea September 14' 198i in Book 581 at Page 217 ac
Rcception No. 319134.
TogetherwithanaccesseasementasshownontheSieversAmendedExemption
Plat recordeo as neJe*lon rtro' 503455 and all easoments as describcd in
ersement agreement;i[;; apal so, 1997 in Book 1ol6 at Page 942'
Prrcel 2
A parcel of-la.nlsituated in the Moandar Land of the Grand (Cotorado)StEtiiittg
in the Swlr4r'rerll oi s"aion s, Township 6 South' Range 92 W
Prlncipal Meridian, c"mlJCo"n'ty, Colorado, lying triorthelV of tft" centerllnc of
the colorado River, southeasterly of the Souinlai rignrot-way line of lntertEts
70 and lyins betwee;Lil;;e 6 of said se&iln 5, said pircel is morr fully
described as follows:
Beginningattheintersectionpointofsaidright.oFwaylineandtheSouthwesterly
line of said Lot 6 whence ttte Northeast cimer of iaid section 9 bears North
lllr!1il'Er,l"i'zizi.i'o feet; thence south 50"30'00" East 235.34 feet arons thc
rl^*L li.6Lilii ii.*=iili'iil,:1, il'' ilH:;;ffi ''si]r ino" East ar ons the- North bank
,^. .^ - ^^i^+ ^6 rhe Frsi;rlv line of said swllclelln ueingil,:Xl.::lld".H]fi r:':i;";':;;;ffi; E;"iilt rine or s-aid
-5w1/4NE1/4
beins
E--. -l^an G2irll[Tt""[.T1H#;']"io"i; ;; il;;
'o'tt'
oo"as's'" East arong said
rraaaa Nar{hp""dff 'ffi ::i .:". ;t"i"""i i'1[ -"".',"
J" ;' ; ;; ; ;;i;; oi saia rive r; then cs No]th
.:-a ^6 lha
il""j;:;'0,:"'fr ":;;ff :;i;' ;;;L'ii,"i zsz.os 1931. ... i, _p_'lT-^": ^:::Northeasterly lins of s"io-Gt 5; thence North 62o59'00" W€st along the South
bank Meander line; 512.99 feetto a point on said right-of-way line; thence along
said right-of-way line, North 56o00'00" East 299'63 ieet; thence North 57058'30"
East z7t.o8 feet to THE PoINT oF BEGINNING.
IlnCl':',':- - i.t.Il 2 : lC00
i)
't1
2
c0
LHIJIU,IULII'illll|]tu llr|l'I[L!!rl]!ttl'[ri-.r-i i-rg.go o o.so GnRFIELD couNTY c0
,i
QUITCLAI]II DEED
TtltS DEED. mdc this 17TH 'rav of MARCH' 2000
rrctwmMURRILL THOMAS SCO17 AA/D SUEAIVN SCO77
I
l
I
I
I
I
I
I
I
I
I
I
I
coudy of GARFIELD
srulg(t),!d TOWN OF SILT
of thc
ud sirt! of COLORADO
wtw rcsrr ddra it 231 NORTH 7TH STREET, SILT, CO 81652
of tlE cqrryof GARFTELO urasurcof COLOMOO , trdr(tF
wrrNFss.udrhe,'rnr6(*r**i**oofrhcomof IENDoLlJqRS ANDOTHERGOOOANOVALUABLE
CONSTDERAITON Dottrr rtc rsp. ud sfiiciff, of *hidr i! hcrcby rctNprc( hrw rmroa. El.rtc( told TdQt ITCLAIMED. ud
by rtE Fd do @irq Elc&. Ell rid QUrrcIiIM uoro rlE gnnrcqt), 6cir hcir um urd ufunr .ffi, rll lh. tidr. $rle it|rtc3-
cleim urd dgmnd *hidt lhc grutrq(t) hrvc in .rd b $c Ml FoPdry, to8dlr wi|lr iBPtovmttt rf uy' riurra lyins rrd b'inB in tbg
corry of GARFTELD ud strc of Colsrdo' dsibcd u follow:
Seo oxh,bif 'A' attached hereto
aN made a Paft hereot
dD k wn by rna rd runrbs u: TBD R,VER FRONIAGE F OAD, SILT, CO 81652
Esodt tchadrb r pd nunb6
TO IIAVE AND TO HOLD rhc ue ogalr urh dl ud ringulr lhc rPpunfie .rd P.isl.t€ UEsb b'logo!. fi in !tl^rit' tisBno
.!9su8mg rd rlt thc !d4 n&h! urlc. inlqa .nd clltm *hlEE of lhc gmrq(t)' 'iths in lrw 6 cqutry' io th! 6ly FoPq s' bGBf[ ud
bcfmf of tl! gnaqr) thsir hcio Id siOr fqrc.
f N WTTNESS WHEREOF. th! fruq{t) h.E GISE{ thit d.rd o UE drE 6 fqrh rboE'
MURRILLTHOMAS SCO77 SUEANN SGOr7
STATE OF COLORADO
cur.yotGARFIELD
Thc fmgomg ironmr wr ..lelcd3cd bcfc G urit 17TH
av MLJRRILL THO MAS SCOI7 A,VO SUE ANMCOTT
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2 ol 2 R 1O.gO O O.00 GRRFIELD C0UNTY c0
EXHIBIT "A"
A tract of land situate in Section 9, Township 6 South, Range 92 West of the 6th
Principal Meridian being more particularty described as follows:
Beginning at a point whence the NE corner of said section 9 bears North
50o46'02" East 3200.85 feet; thence, South 62"59'00" East, 512'99 feet along the
South tine of a tract of land describeJ in Book 816 at Page 128 of the records of
the Clerk and Recorder of Garfield County, Colorado; thence South 57o3$'M"
West 173.69 feet along the center of the CoioraOo River; thence North 84o55'11"
West 321.g1 feet along the center of the Colorado River; thence, No.rth.63"00'47"
west 241.06 feet along the center oi ir," colorado River to the southerly right-of-
way line ot lnterstaie 70; tn"n"" along the southerly-right-of-way ItI:-d.lnterstate
70 the foltowing courses: North 5560'00" East 288'27 feet to THE PoINT OF
BEGINNING
EXHIBIT K
lnstitutional arrangements such as contract and/ or covenant terms which will be finalized to
pay for acceptable waste treatment.
The Town of Silt, as a municipality, has institutional control over the wastewater
treatment facility. Through subdivision regulations, zoning and land use processes, the Town
of silt controls flow to the wastewater treatment facility. The Town of silt has partnered
with the stillwater Ranch development for the planning and construction of the wastewater
treatment facillty. The Town of Silt and Stillwater Ranch have agreed to split the design and
construction costs of the phase ltreatment facility . The collection of tap fees, service fees,
mill levy assessments, etc., are also discussed in the attached agreements'
LOM:lec\Oo-1 26.exh
o
EXHIBIT L
Management capabilities for controlling the wastewater loadings within the capacity
limitations of the proposed treatment works, i.e., user contracts, operating agreements,
prstreatment requirements and or the management capabilities to expand the facilities as
needed (subiect to the appropriate, future review and approval proceduresl.
The Town of Silt will be responsible for owning, operating and maintaining the
wastewater treatment facility. As a municipality, the Town has control over the through-put
through the facility through land use, subdivision regulations and ordinances. The Town is
governed under a Board of Town Trustees, a Town Manager, A Public Works Director and
staff , and a treatment plant operator. The treatment plant operator will be licensed to operate
this facility.
LOMrhc\ool26.cxh
EXHIBIT M
Financial systems which has been developed to provide- for necessary capital and continued
operation, maintenance, and replacement througir the life of the proiect' Thls would include'
for example, anticipated fee structure.
The Town has hired the George K. Baum company to provide financial consulting for .,
the initial capital and long-term O & M costs for the facility. As previously discussed' tle.r
Town of silt and Stillwater Ranch will split the cost of the facility. cash flow analysis frol
George K. Baum are attached. The plant will initially be funded through a private revelle,
bond placement. The bond will be paid back via tap fees' service fees and mill leW
assessments. The enclosed tables include projections on tap fee timing and amounts, average.
residential monthly service bills, tap fee revenue, total user charges, bond interest and
-
projected O & M expenses.
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EXHIBIT N
H*ff"tation plan and schedule including estimated construction time and estimated start-
Attached is a bar schedule showing the plant's imprementation, incruding permitting,initial design studies, prant construction and prant startup.
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