HomeMy WebLinkAbout036651
GARFIELD COUNTY BUILDING AND SANITATION DEPARTMENT
109 Bth Street Suite 303
Glenwood Springs, Colorado 81601
Phone (303) 945-8212
INDIVIDUAL SEWAGE DISPOSAL PERMIT
PROPERTY
I
Permit N~ 3665
'· Aalltssor's Parcel No.
This does not constitute
a building or use permit.
Owner's Name ~ ~t( I ~V\vte. Present Addressh5'5 60 I::/ {<./llf~ l<tJ. j!y,.!Jl./~:n~ tjJ ?-//7 {
system Location ____ ____,O:e....::..l.:.::S=-cf_,__._...,._=-_.,,,"'-'-',,_,,e~_G'-=-=-fe.::.:~'.....'..:.:""-=-·•=J'--.S~-'-'-''1..:>~<'..:>~,fc../-=(,-=c_,__ __ _
Legal Description of Assessor's Parcel No. __ _,L=o'--f--c:-_,,().-'-'-'~"-.!.Q-"·_,f..:.i,_fl..:+_.__.,._""'""-+-'--"=n=...._-'-""-'-=::.!..---'=Si"'u=b)"""-'•'-----
J.. 1g5 -35 ~ -O I -o~ I SYSTEM DESIGN
______ Septic Tank Capacity (gallon) ______ Other
______ Percolation Rate (minutes/inch) Number of Bedrooms (or other) ____ _
Required Absorption Area • See Attached
Special Setback Requirements:
Date _____________ Inspector ___________________________ _
FINAL SYSTEM INSPECTION AND APPROVAL (as installed)
Call for Inspection (24 hours notice) Before Covering Installation
System Installer ________________________________________ _
Septic Tank Capacity ______________________________________ _
Septic Tank Manufacturer or Trade Name--------------------------------
Septic Tank Access within 8" of surface --------------------------------
Absorption Area----------------------------------------
Absorption Area Type and/or Manufacturer or Trade Name --------------------------
Adequate compliance with County and State regulations/requirements _____________________ _
Other ______________________ ~-.-------~~~------~---
(0 /~0cr: Inspector~~-~~~~~~P~~ ~ Date
{ RETAIN WITH RECEIPT ECORDS AT CONS
*CONDITIONS:
1. All installation must comply with all requirements of the Colorado State Board of Health Individual Sewage Disposal Systems Chapter
25, Article 10 C.R.S. 1973, Revised 1984.
2. This permit 1s valid only for connection to structures which have fully complied with County zoning and building requirements. Con-
nection to or use with any dwelling or structures not approved by the Building and Zoning office shall automatically be a violation or a
requirement of the permit and cause for both legal action and revocation of the permit.
3. Any person who constructs, alters, or installs an individual sewage disposal system in a manner which involves a knowing and material
variation from the terms or specifications contained in the application of permit commits a Class I, Petty Offense ($500.00 fine -6
months 1n jail or both)
WMe -APPLICANT Yellow -DEPARTMENT
T0:9P94501'l<!
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INDIVIDUAL SEWAGE DISPOSAL SYSTEM APPUCATION
PEllMlT REQUEST FOR (~INSTALLATION ( ) ALTERATION ( )REPAIR
Attach separate sheets or report showing entire area with respect to surrounding areas, topography of area, habitable
building, location of potable water wells, soil percolation test boles, soil profiles in test holes (See page 4).
LOCATION OF PROPOSED FACil.JTY:
NearwhatCityofTown G /.f!Wco& 5 /?rt'Ag;;, Sizeofl.ot / / G;. S-C? Ac.re...S
LegalDeSCiiptionorAddress Lot 'd...d..of LJ,..::;+8..nt R-.-.c.b. 'F-;1;~~ I
WASTES TYPE: <,)<f DWELLING ( ) TRANSIENT USE
( ) COMMERCIAL OR INDUSTRIAL ( ) NON-DOMESTIC WASTES
( )OTHER-DESCRIBE. ______________ _
BUil.DINGORSERVICETYPE: :?,'A$/'-Ft..fYl1.,; p,,,.,.11;,,'Y
Number of Persons_-'~~---
( ) Garbage Grinder 'JI..> Automatic Washer SJ() Dishwasher
SOQRCE AND TYPE OF WATER SUPPLY· ( ) WELL ( ) SPRING ( ) STREAM OR CREEK
If supplied by Community Water, give name of supplier: Ve> , W e.s+&11 k._
DISTANCE TO NEAREST COMMUNITY SEWER SYSTEM: / rn; I <-+= -
Was an effort made to connect to the Community System? __ -jl/~.)r,__ ________ _
A sift ..... fs reagired to be SIJl!niffd tlpt lpdlgtg tlle , ...... MINIMVM d&tuces:
Leach Field to Well: IOI feet
Septic Tuk to Well: 50 feet
Leach Field to Irrigation Ditches, Stream or Water Coune: 50 feet
Septic System te Pnperty Lines:(septic tank &leach field)tO feet
YOUR INDIVIDUAL SEWAGE DISPOSAL SYS'fEM PERMITWILL NITTBE ISSUED WITHOUT
ASITEfLAN.
GROUND CQNDITIONS:
Depth to first Ground Water Table. ___________________ _
Percent Ground Slope _______________________ _
2
.. • .. -... ·1..~ '.'C. ,· :a,.:..c.: .
OF INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED:
)
?() SEPTifiTANK• ( ) AEltATION PLANT ( ) VAULT
) VAULT PRIVY ( ) COMPOSTING TOD...ET ( ) RECYCLING, POTABLE USE
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) PIT PRIVY ( ) INCINERATION TOil.ET ( ) RECYCLING, OTilEll USE
) CHEMICAL TOD...ET ( ) O'IHER-DESCRIBE
mJAL DISPOSAL BY:
:x> ABSORPTION TRENCH, BED OR PIT ( ) EVAPOTRANSPIRATION
( ) UNDER.GROUND DISPERSAL ( ) SANDFll.TER.
( ) ABOVE GROUND DISPERSAL ( ) WASTEWATER POND
( ) O'IHER-DESCRIBE
Wil..L EFFLUENT BE DISCHARGED DIRECTLY INTO WATERS OF 1llE STATE? /\( ()
fERCOLATION TEST BESULIS: (To be compleled by Registered Professional Engineer, if the Engineer does the
Percollllion Test)
Minutes. ____ per inch in hole No. I Minutes ____ _,per inch in hole NO. 3
Minutes per inch in hole No. 2 Minutes _____ per inch in hole NO. _
Name, address and telephone ofRPE who made soil absorpcion tests: ___________ _
Applicant acknowledges that the comj,Ieteness of the application is conditi<>Jlll upon such further mandatory and
additional tests and reports as may be iequired by the local health department to be made lllld furnished by the applicant
or by the local health departmaJt for purposed of the evalultion of the application; and the issuance of the permit is
subject to such terms and conditions as deemed necennry to insure complianc:e with rules and regulations made,
information and reports submitted herewith and required to be submitted by the applicant are or will be represented to
be true and comet to the best of my knowledge and belief and are daigned to be relied on by the local department of
health in evaluating the same for purposes of issuing the permit applied for herein. I further understand that any
fa!sifu:ation or misrepresentation may result in the denial of the application or revocation of any permit granted based
upon said lication and in I action for perjury as provided by law.
Signed
Designate North Arrow
Your Neighbor's
Name & Address
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Your Plot -Shape to Fit
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Locate well, all st,feams, irrigation ditc~s. t:hd any water courses Draw in Y°'t house,
stptic tank & system, detac ed garages, and driveway.
,tion is necessary, you must submit a corrected drawing, before a
Certificate of Uteaoatieq ,.au be issued.
County Road (Note the Ro 111ne)
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Lynne Cantrell
P.O. Box 2104
Basalt, CO 81621
RE: Cantrell Property-Proposed Lot 22, Onsite Wastewater System (OWS), Westbank Ranch,
Filing 1, Garfield County, Colorado
SE Job No. 22050.01
Dear Ms Cantrell:
Pursuant to your request, through Ron Robertson, this letter presents our findings in regard to the
feasibility and design for an Onsite Wastewater System (OWS) at the above referenced Site. Our design is
based on existing and proposed site conditions and information provided by others for use in supporting
your application to Garfield County. Our findings are in accordance with Garfield County and the State of
Colorado Individual Septic Disposal System (ISDS) Regulations and general engineering guidelines
regarding On-Site Wastewater Systems. We have reviewed the geotechical report and site plan forwarded
to us, formulated an OWS design and created a site plan with construction details as part of our scope of
work.
Conclusions:
Based on our findings we believe that the design and installation of an approved OWS system is feasible in
accordance with the Regulations of Garfield County and the State of Colorado. We recommend that the
design include the installation of a new 1500-gallon septic tank that will pressure discharge effluent to a
soil absorption trench system. We recommend the use of a filter/pump distribution system. The OWS
will meet all required setbacks and be installed within the general location indicated on the plan. Our
design is outlined below and delineated on the attached drawing.
Site Location:
The subject site is located at the end of Oak lane, off the cul-de-sac, on Lot 22 in the West Bank
Subdivision, in Garfield County, Colorado. The Site comprises approximately 1.7 acres. The site is
bounded on the north by the Roaring Fork River, on the east and west and south by adjoining single-family
lots.
j 502 Main Street • Suite A3 •Carbondale, CO 81623 • (970) 704-0311 • Fax (970) 704-0313
SOPRIS ENGINEERING LLC civil consultants
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Existing Site Conditions:
Lynne Cantrell.
SE Job No. 22050.01
May 8, 2002
Page2
The site is located on historical agricultural lands. The site is located on a topographic bench
approximately 30 feet above the River. The site has moderate to severe slopes (12%-30%) across the site
toward the north. The site is covered with native grasses, sagebrush scattered juniper and pinon trees.
Domestic water is supplied by an existing central water system. There are no wells within the general
vicinity of the site.
Proposed Site Conditions:
It is our understanding that you intend to construct a 3-bedroom home. The proposed improvements will
include a new ISDS system with appropriate site grading. The proposed absorption field area has suitable
soil with surface grades between 12% and 18%.
Subsurface Conditions:
We have reviewed the results of a subsurface investigation conducted on August 20, 2001 by Hepworth-
Pawlak Geotechnical, Inc. The HP report is dated August 30, 2001, Job Number 101 566. The subsoil
encountered at the site consists of 1 foot of topsoil overlying sandy silt and clay over sandy silt and gravels
with cobbles and occasional boulders. Groundwater was not encountered to depths of 8 feet in the test
profile borings.
Prior to construction of the OWS additional soil evaluations will be performed in the staked out location of
the absorptions trenches to confirm assumptions made in the design. Any modifications necessary will be
made at that time.
OWSDesign:
The OWS will be designed to treat the wastewater from an equivalent 3-bedroom single-family home.
Our design recommendations for an ISDS include the installation of a 1500-gallon concrete septic tank
equipped with an Orenco Systems Bio tube pump basin vault installed in the secondary chamber of the
septic tank. This type of pressure dose system will provide controlled discharge to the absorption trenches.
The treated effluent will pressure discharge to a new-engineered trench soil dispersal system for treatment
and infiltration into the ground. The soil absorption system will consist of gravelless absorption chambers
installed in natural soils and will be located up gradient of the proposed house, as delineated on the site
plan. The system will meet all required standards and setbacks.
Design Criteria:
Residence unit - 3 bedrooms @ 2 person /bedroom = 6 person
Max. Design flow (Qd) =#of people x 1.5(peak flow) gal/person/day.
Gallons per day for the subject house = 75 gal/person/day
Qd = 6*75*1.5 =675 gal/day
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Soil Absorption System Design:
Lynne Cantrell.
SE Job No. 22050.01
May 8, 2002
Page3
Calculate per LTAR method: Assume LTAR = 0.5 gal/day/sq. ft. Based on sandy silt and clay soils.
A = _Qg_ = 675 = 1500 sq. ft. Apply a 50% reduction for utilizing gravelless
LT AR 0.5 infiltration chambers.
Assume 31 square feet per chamber: 1350 sq.ft. = 44 chambers Use 44 chambers
31 sq.ft/chamber(50%)
Use 675 sf of trench with gravelless chambers in 4 trenches of 11 or 3 trenches of 15.
Trench Distribution System
We recommend that the pressurized transport pipe from the dosing assembly be connected to a distribution
manifold in a flow splitter basin. Individual pressure pipes will charge each trench. Each trench will be
constructed level with successive trenches installed at a slightly lower elevation than the preceding trench.
Each trench shall be constructed not to exceed a maximum depth of 3 feet. The method allows for the
sloped terrain, provides increased longevity of the system and allows for maintenance and/or partial
reconstruction if needed. An inspection port should be installed on the top mid-point cut out at the end
chamber in each trench. This will allow for checking the performance of the system over time. Effluent
will be pumped to the head of each trench via an individual pressure line and distributed through a 1.25"
pressurized perforated distribution pipe running the length of the trench to the mid point of the end
chamber. The end of the pressure line will be capped with a ball valve used for flushing the line if
necessary. The valve will always be closed during normal operation.
Dosing Distribution System
A septic tank effluent pump system will be utilized to transport effluent to the distribution manifold in a
flow splitter basin at the head of the highest trench. We recommend the use of an Orenco Systems
BioTube pump vault system or approved equal. The pump system shall incorporate dual pumps to insure
continuous operation in the event that one pump fails to operate. The controls shall provide for alternate
operation of each pump. Automatic float switches including a high water float with alarm shall be
incorporated in the system. The pump assembly and dosing chamber will be installed in the secondary
compartment of the septic tank. The vault will utilize a maintainable effluent filter. The transport line
from the dosing pump to the absorption field shall be schedule 40 PVC with a maximum diameter of 2.0
inches. The trenches will be pressure dosed utilizing a maximum 2" diameter perforated pipe running the
length of the trenches to the midpoint of the end chamber. The orifices in the distribution lateral shall be
1/8" -\4" diameter spaced at a maximum 4' apart. The perforated distribution pipe will be installed at the
top of the chambers and oriented to spray upward off-center. A plastic ball valve will be installed on the
end of the distribution pipe to be visible and operational from the 4" inspection port. The effluent pump
shall be sized to pump at a minimum velocity of 4 ft/sec. The dosing volume shall not exceed 150 gallons.
••
ISDS Operation and Maintenance
Lynne Cantrell.
SE Job No. 22050.01
May 8, 2002
Page4
The engineered system shall be inspected on a regular basis and be properly maintained. The system and
responsibility for repair and maintenance of the system will remain with the Lot Owner. The owner shall
retain the services of qualified personnel to inspect the OWS and to perform all maintenance and repairs
necessary to ensure that the system is in good operating condition and is in compliance with the
manufacturers performance requirements. The operating components of the OWS will be inspected within
30 days of being placed into operation and thereafter every six months. The dual pump dosing assembly
and filter shall be maintained when the tank is pumped or as needed. Suitable component handles and
extensions on the pump and filter assemblies will be installed to provide easy maintenance. We
recommend a periodic inspection and maintenance procedure be performed every 6 months.
The OWS system should require minimal maintenance. Several factors influencing the need for
maintenance include: actual wastewater flows versus design flows, the volume of kitchen/domestic waste
(excluding human waste and toilet paper), excessive household chemicals and other toxic liquids. The
tank, dispersal field and other applicable treatment system components should be visually inspected bi-
annually for debris, wear, damage, leaks, or other potential problems. In general, for a properly utilized
system, septic tanks should be pumped and inspected every 2 - 4 years. The effluent filters should be
cleaned every six months and at the time of pumping. Absorption fields should be maintained with
suitable cover and kept free of root invasive plants. Positive surface drainage away from the absorption
field should be maintained.
Construction and Inspections
Prior to construction of the permitted system the engineer should be contacted by the contractor and owner
well in advance to provide adequate time to discuss the system components with the contractor, answer
questions, resolve any conflict issues and schedule inspection site visits based on construction progress.
County Regulations require that the Design Engineers of record perform site inspections of the permitted
system during construction and provide "As-Built" documentation of the installed system to the County
after construction is complete.
General Notes:
1) All materials and installation practices shall conform to the State and County Individual Sewage
Disposal Regulation.
2) All sewer lines and distribution lines in the system shall be 4" Schedule 40 or SDR-35 PVC unless
specified otherwise on the plans or in this report.
3) Add a two-way clean out on the service line from the proposed house.
4) The system shall be plumbed to distribute effluent into the trenches with equal distribution.
5) The contractor shall ensure that the concrete septic tank, risers and sewer lines are watertight.
6) The trench area must be protected to prevent damage from vehicular or livestock traffic and must be
crowned to divert drainage runoff away from the trenches to minimize surface infiltration.
•
• • , Lynne Cantrell.
SE Job No. 22050.01
May8, 2002
Page5
7) The infiltration chambers shall be installed level in each trench. A splash plate shall be installed on the
trench bottom surface below the inlet in each serial trench to prevent scouring from the effluent. The
top of the backfill over the chambers shall be covered with filter fabric or other suitable pervious
material to prevent the migration of fines from the overlying topsoil layer.
8) The trenches must have a minimum cover of 12 inches. A final cover of topsoil suitable for vegetation,
a minimum 4" deep, shall be placed from the top of the pervious cover layer to the finished surface
grade.
9) The absorption trenches must be sodded or covered with vegetative ground cover.
Our design and recommendations are based upon data supplied to us by others. If subsurface or site
conditions are found to be different from those presented in this report, we should be notified to evaluate
the effect it may have on the proposed ISDS. If the County Environmental Health Department requests
changes or modifications to this design, we should be contacted to evaluate the effect on the ISDS.
If you have any question or need any additional information, please call.
Sincerely,
SOPRIS ENGINEERING, LLC
~~
Paul E. Rutledge
Design iiill!!_,1!8-.
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Lot 2.1
SE 44 INFlL lRA TOR CHAMBERS IN 4 ROWS OF 11.
LOCAllON OF 'TRENCHES NA'1 8E AD.AIS'TED AS LONG
AS A TOTAL OF 685 SO. FT. OF AREA IS PRO'll'IDEO,
LOCATION OF' TRENCHES MUST BE WllHIN 1HE
GENERAL LOCATION SHO\llfll AND MEET AU. COUNTY
SETBACK REQUIREMENTS. 11-IE SYSTEM SHALL BE
PLUMBED FOR EQUAL DISTRIBUTION. lHE CHAMBERS IN
EACH TRENQI SHAU. BE INST AU.ED AT LEVEL GRADE.
11-tE BOTIOM ELEVATION OF EAOi lRENOi MAY VAAY
TO ACHIE\IE A MAx.itUM DEPTH OF J8 INCHES TO
n-tE BOTTOM SURFACE aaow THE PROPOSED GRADE.
LA 'r'OUT OF PROPOSED TREHC>IES
AHO SOl. CONDITIONS TO BE
APPRO'tEP BY Tl-IE ENGINEERS PRIOR
TO EXCAVATION. MODIFICATIONS TO
lHE DESICN OF SYS1EM 'MlL BE
DfPENDANT ON AQOITIONAL
GEO-lEOINICAt. (VAWATIONs PRIOR
TO CONsmtlCTIOH.
ISDS SVSTEM NOTES
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1. ADD A TWO-WAY CLEAN OUT ON THE SERVICE LINE FROM THE HOUSE.
2. ALL MATERIALS AND 1NSTALLAT10N SHALL CONFORM TO GARFIELD
COUNTY AND THE STATE OF COLORADO INDIVIDUAL SEWA'fE DISPOSAL
SYSTI:M (ISDS) REGULATIONS. / ·
'' 3. ALL SEWER LINES TO BE SDR-35 OF SCHEDULE 40 P. V.C. P(PE UNLESS
NOTED OTHER~SE.
4. THE CONTRACT~ SHALL ENSURE ALL SEWER LINES AND SEPTIC TANKS
ARE WA TERTlGHT. ANY POTENTIAL PLUMBING LEAKS SHALL BE
REPAIRED TO AVOID EXCESSIVE WATER ENTERING THE SEPTIC sygin.t.
5. IT IS THE RESPONSIBILITY OF THE CON'!RACTOR TO CONTACT ALL
UTILITY COMPANIES FOR FIELD LOCATIONS OF UTIUTIES PRIOR TO
CONSTRUCTION ANO EXCAVATION.
6. THE ABSORPTION TRENCHES MUST BE MARKED AND PROTECTED TO
PREVENT DAMAGE FROM VEHICULAR AND LIVESTOCK TRAFFIC.
7. THE TANK SHALL BE INSTALLED LEVEL ON COMPACTED EARTH. INSTALL
WATERTIGHT RISERS AS NECESSARY TO BRING ALL REQUIRE'.D ACCESS
POINTS TO THE FINISHED SURF ACE GRADE USING IN SULA TED LIDS ..
INSTALL THE INLET AND OUTLET TEES TO BE EA5'LY INSPECTED AND
MAINTAINED FROM THE TANK RISERS AND ACCESS LIDS.
8. AN EffLUEN1' PUMP ASSEMBLY WITH FILTER SHALL BE INSTALLED IN
THE SECONDARY COMPARTMENT OF THE SEPTIC TANK. THE DUAL
D05'NG PUMP ASSEMBLY AND FILTER SHALL BE MAINTAINED WHEN
THE TANK IS PUMPED OR AS NEEDED. INSTALL SUITABLE COMPONENT
EXTENSIONS ON THE PUMP AND FILTER ASSEMBLIES TO BE ~THIN
12• BELOW THE ACCESS LID. WE RECOMMEND A PERIODIC INSPECTION
AND MAINTENANCE PROCEqURE BE PERFORMED EVERY 6 MONTHS.
8. THE ENTIRE ABSORPTION TRENCH SURFACE MUST BE SODDED OR
RE-VEGETA'TED ~TH GROUND COVER.
9. THE ABSORPTION TRENCH SURF ACES MUST BE CROWNED TO DIVERT
SURFACE DRAINAGE AWAY FROM THE TRENCHES.
10. THE DIMENSIONS SHOWN ON THE PLAN INDICATE MINIMUM AREA AND
SEPARATION DISTANCES FOR THE TRENCHES.
11. EACH TRENCH SHALL BE LEVEL AND CONNECTED FOR EQUAL
DISTRBUTION. THE MAXIMUM DEPTH OF ANY TRENCH SHALL
NOT EXCEED 36".
12. THE CONTRACTOR SHALL NOT EXCAVATE TO A DEPTH GREATER THAN 3
fEET AT ANY ONE LOCATION WITHIN THE SITE OF THE PROPOSED
ABSORPTION CHAMBER TRENCH. THE MINIMUM COVER OVER THE TOP OF
THE ABSORPTION TRENCH SHALL BE 12 INCHES NOT TO EXCEED 24".
13. THE TRENCH CHAMBERS ~LL BE BACKFILLED ~TH EXCAVATED MATERIAL
VOID OF ROCKS. THE BACKF1LL MA TERI AL SHAUL NOT EXCEED 2 1 /2"
DIAMETER AND SHALL BE PLACED TO AT LEAST 6 INCHES ABOVE THE
TQP OF THE CHAMBERS. THE TOP OF THE PLACED BACKFILL SHALL BE
COVERED ~TH A LAYEil OF FILTER FABRIC. A MINIMUM 4" DEPTH OF
TOPSOIL IS TO BE PLACED ABOVE 'THE 81".CKF'ILL TO 1'HE SURf lo.CE. 1'HE
· 1~ENCH BOTIOM SHALL BE SQARIF1ED IF SMEARING OCCURS.
•ti 1ri;i-if'a· ·-.,,c?-rTION PORT<:; <;HAI r RF lf\'CilM' ... n ~0V T'r-1F \r!M,...-el'
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partmenl Drawdown
TRENCH BOTTOM BELOW EACH TRENCH INLET TO PREVENT SCOURING.
15. ALL INSTALLATION OF TRENCH CHAMBERS SHALL BE IN CONFORMANCE
,---~-----~-, Wl1:"° THE-MANUFACTURES-INSTAt.tATION INSTRtJCTIONs.-·
~PROXIMAlE El.£VATIONS
INLET IN\/[RT ELEV. •978
BOTTOM ~CH ELEV. •977
Lot 20
DOSING ANO DISTRIBUTION S'r'STEM
1. AN ORENCO 810-nJBE VAULT SHAU. BE INSTAl...l.ED IN lHE SECONDARY
OiAMBER IN THE 2,000 GALLON SEPTIC TANK.
2. THE DUAL/DOSING PUMP ASSEMBLY SHALL BE AH INSTAU.ED
CCMPONENT IN lHE BtO-lUBE VAULT. INSTAU. WATERTIGHT RtSERS
C£NTER£0 OVER THE ACCESS PORTS TO EASILY INSPECT AND MAINTAIN
SYSTEM COMPONENTS FROM THE SURFACE. USE INSULATED ACCESS
LIDS.
3. JNSTAU.. ISOLATION BALL VAL\€5 ON EACH PUMP OJSO-IARGE LINE.
INSTALL QUICK DISCONNECT TI-IREADED COUPLERS ON EA.Of PUMP
DtSOtARGE LINE.. EXlEND DISCHARGE LINES UP TO WITHIN 12• or lHE
ACCESS LID TO PROVIDE EASY ACCESS FOR MAINTENANCE OF lHE
PUMPS.
4. A DUAL PUMP OISlRIBUTION SYSlEM SHALL BE INST AUED TO
OISOIARGE EFFLUENT TO lHE ABSORP110N FlEl.D lHROUGH lHE HYDRO
SPITTER IN THE DISlRIBUTTON BOX. THE DOSING VOLUME SHALL BE 150
CAI.LONS PER DOSING CYCLE.
5. THE APPROXIMAlE ORAWOOWN IN THE TANK IS 1a•.
6. INSTALL PUMPS ASSEMBLIES. RISERS. ELECTRICAL SYSTEMS, FlOA TS AND
D150-IARGE LINE PER MANUFACTURES INSTALLATION GUIDELINES. USE AN
ORENCO SYSTEMS MODEL THE SYSTEM SHALL BE
INSPEClED BY A QUAUFlED TECHNITION EVERY SIX MONTI-IS.
7. ALL INSTAL.LATION AND MAINTENANCE SHALL BE PERFORMED BY A
QUALIFIED PERSON IN ACCORDANCE 'MTH THE INSTALLATION le
MAINTENANCE GUIOEUNES FOR THE ORENCO SYSTEMS 810-TUBE VAULT
PUMP ASSEMBLY .
B. THE HYDRO-SPUTTER DISTRIBUTION SYSTEM SHAU. BE DISTRIBUTE FLOW
EVENLY TO EACH CHAMBER ROW IN THE ABSORPTION FlElDS. Tii£
H'l'DRO-SPITTER OISlRIBUlTON BOX SHAl...l BE INSTALLED AT
APPROPRIAlE DEPTHS ANO EXTEND TO THE FINfSH SURFACE GRADE ANO
BE EQVIPPEO WllJ.I AN INSULATED ACCESS LIO.
9. TiiE HYDRO-SPITTER DISlRIBUTION BOX WILL BE CONFIGURED WITH
INDIVIDUAL DISCHARGE LINES FOR EAot CHAMBER TRENCH. lHE
EFFLUENT WllL DtSCHAGE OUT Of THE LINES TO 2 INCH PERFORATED
OISTRIBUTlON LINES . lHE IN\€RT OF THE EFFLUENT DISOiARGE LINE AT
THE MANIFOl...D SHAU. BE AT LEAST e• ABO\£ THE INVERT OF lJ.IE
PERFORATED DtSiRIBUTION LINES AT lltE HEAD OF EACH lRENCH.S.
:t<H•• ,,.r.1t""lr-a:11r '"61'TIU
16. THE DUAL PUMP DOSING ASSEMBLY SHALL INSTALLED IN CONFORMANCE
WlTH THE MANUFACTURERS INSTALLATION GUIDELINES. THE DOSING
SYSTEM SHAtL BE EQUIPPED WITH AUTO~A TIC CONTROLS W'ITH A HIGH
WATER fLOAT AND ALARM. THE CONTROLS SHALL PROVIDE FOR
AL TERNA TE OPERATION OF EACH PUMP. THE PRESSURIZED PIPE FROM
THE DOSING SYSTEM TO THE TRENCHES SHALL BE SCH 40 PVC. THE
DOSING PUMP SHALL BE DESIGNED TO MAINTAIN A MINIMUM VELOCITY
IN THE UNE OF 4 FT /SEC.
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GENERAL NOTES:
1. THE ISDS SYSTEM AS SHOWlN ON THE PLAN AND THE DETAILS \\£RE
DESIGNED BY SOPRIS ENGIN,EERING. THE PROPOSED HOUSE, DRIVEWAY
AND PROPOSED CONTOURS WAS PROVIDED BY RON ROBERTSON. THE
EXISTING LOT CONDITION AND SURVEY INFORMATION WAS PROVIDED BY
UNES IN SPACE.
2. THE CONTOUR INTERVAL ON THIS MAP IS 2 FEET .
OPR/S ENGINEER/NC, .LLC.
'fflL CONSULTANTS!
502 MAIN STREET, SUITE A3
CARBONDALE. CO 81623
(970) 704-0.311
NOi DATE REVISION
LOT 22, WEST BANK RANCH
GARFIELD COUNTY. COLORADO
CANTRELL RESIDENC:
PROPOESED ISDS sYSTEM:
CONSTRUCTION DETAIUI
DES. PER I CK. YTN I FILE NO.
DR PER DATE 5/21/0Z 2%060.0t
SHJ
OF
GRAPHIC SCALE
20 01020..., !ID
~---~ I I
( IN FEET )
I blch -20 fl
EASEMENT LINE~
INSTALL MINIUMUM 24• RISER OVER SEP'TI'
TANK PRIMARY CHAMBER ACCESS 0P£NING F'I
ACCESS TO TANK. INSTAU. A MINIUMUM 36"
DIAMETER ACCESS RISER OVER SEPTIC TANK
~DARY CHAMBER ACCESS OPENING FOR
ACCESS TO PUMP ASSEMBLY VAULT. All
RISERS TO HAVE APPROPRIAlE INSULATED LIDS
AT TWE SURFACE.. OEPTli TO TOP OF TANK
FROM PROPOSED GRADE rs APPROXIMATlEY ......
i> <f~
fc/
2
!:l
~
11
"
MAINTAIN A MINIMUM Ufli"_!l'I. ~-.........
COVER OF 3 FEET O\Q: ~SfORT
UNE Wint A MINtMUM 2X
GRADE TO AU.OW 1H£ UP
~ BACK TO THE To
Y~~~ r~~
7 S£TBACK I -;-%o~
'dl'2 ,., "'-....:: '~
~~ ~""" ~HO<JSI
-96S.J. ~ I
"-~ ,,,.
"-
INSPEC110N PORT
W/ CJ.I> (NO GLUE)
.OW SPUTTER BASIN
•TH PRESURE
DISTRIBUTION MANIF'Ol.D
--~EXISTING GRADE
--~ PROPOSED GRADE·
:----
PROPOSED eott:BI~
caoss SECTION SYSTEM DETAIL
N.T.S.
"°"' EACH RUN OF CHAMBERS MUST BE LEVEL INLET ANO ENO CAP TO BE
USED ON EACH ENO CHAMBER. INSTALL 4• PVC INSPECTION PORT W/ CAP
ON EACH ENO CHAMBER OF EACH TRENCH. MAINTAIN 6' OF UNDISTVRBEO
SOIL BETWEEN lRENCHES. TI-IE TRENCH BOTTOM ELEVATION Of ADJACENT
TRENCHES MAY VAAY. MAXIMUM DEPlH Of TRENCH BOTTOM SHALL NOT
·EXCEED 36 INCHES. A 2· SCH 40 PERFORATID PRESSURE PIPE W/l/4"
ORIFICES SHAll BE INSTALLED AT THE TOP OF' THE CHAMBERS FROM THE
INl.ET TO THE MIDPOINT Of THE END OF' CHAMBER IN EACtl ROW TO INSURE
EQUAL DISTRIBUTION Of EFFl.UENT ALONG THE TRENCH. MAXIMUM
SPACING OF ORlflCES SHAU. NOT EXCEED 4-". INSTAU. A BAU. VALVE AT
CROVltol FE..D TRENCH TO~E END OF THE DISTRIBUTION LINE ACCESSIBlE FROM THE INSPECTION Dl~T SURFACE WATER PORT TO ALLOW RUSHING OF THE LINE. THE VALVE IS a.osED FOR
NORMAL OPERA TlON.
RE\'£GATATION~ TOPSCIL LAYER
J' MIN $'MIN
BACKFILL LA'l'ER NAlURAL
ONSllE sm.s FREE OF ROCKS"--..---' -) :; :;:; :; :; :; ; I I
:~~f~~
SCREENED BACKFllL LA'1'£R
NATURAL ONSITE SOILS FREE
OF GRA \IEL AND ROO<S IN
EXCESS OF 2 t/2• DIAMETm
STADARD CAPACliY
INALlRATOR OiAMBER (T'IP.)
SCARIFY /TILL BOTTOM SURF ACE TO
A. DEPTH OF 3• A.NO RAKE ~ STADARD CAPACITY
INFILTRATOR CHAMBER (T'IP.)
1o" MIN.
12•
UNDISTURBED SOIL
CHAMBER TRENCH CROSS SECTION DETAIL
N.T.S.
" ~
"""""' ~
994 --lr----.. I
---
........ =~~ ......... '-"""... " wwwl l ......--'
"""'~! I b I I u .........
•
Effiuenl Pumping System -2nd C
Lynne Cantrell
Cantrell Residence
P.O. Box 2104
Basalt, CO 81621
•
October 28, 2002 I
RE: Cantrell Residence -As-Built Onsite Wastewater System (OWS), Lot 22, West Bank Ranch.
Garfield County, Colorado
SE Job No. 22050.01
Dear Ms Cantrell:
Pursuant to County Regulations, this letter provides documentation that the new Onsite Wastewater
System (OWS) system recently installed is in compliance with the permitted design. Sopris Engineering
has performed site visits to measure, inspect, and document the as built conditions of the constructed
system. We have coordinated our efforts with the contractor that built the system. The various
components of the system were inspected prior to backfilling and after all installations were completed.
The as-built conditions and installation of the new ISDS components is in compliance with the design
specifications for the system. The specified 44 chambers were installed in a trench configuration in native
soils. The as-built location of the new OWS system is within the general orientation and location as
delineated on the record drawing dated 10/28/02.
A 1500-gallon dual compartment septic tank was installed with a pump vault dosing system. The
absorption field was constructed as delineated on the site plan. Each trench was installed level utilizing
specified materials installed according to design. Inspection ports were installed on the end chambers. The
minimum setback distances have been maintained.
The septic tank, dual pump dosing vault assembly, distribution pipe, and absorption trench installation are
in accordance with Garfield County Regulations, the design presented in the Sopris Engineering Report,
dated May 8, 2002 and the design drawing, dated May 21, 2002.
OWS Operation and Maintenance
. The engineered system shall be inspected on a regular basis and be properly maintained. The system and
responsibility for repair and maintenance of the system will remain with the Lot Owner. The owner shall
retain the services of qualified personnel to inspect the OWS and to perform all maintenance and repairs
necessary to ensure that the system is in good operating condition and is in compliance with the
manufacturers performance requirements. The operating components of the OWS will be inspected within
30 days of being placed into operation and thereafter every six months. The dual pump dosing assembly
and filter shall be maintained when the tank is pumped or as needed. We recommend a periodic inspection
and maintenance procedure be performed every 6 months.
I 502 Main Street• Suite A3 •Carbondale, GO 81623 • (970) 704-0311 •Fax (970) 704-0313 I
•
Lynne Cantrell
SE Job No. 20050.01
October 28, 2002
Page2
The OWS system should require minimal maintenance. Several factors influencing the need for
maintenance include: actual wastewater flows versus design flows, the volume of kitchen/domestic waste
(excluding human waste and toilet paper), excessive household chemicals and other toxic liquids. The
tank, dispersal field and other applicable treatment system components should be visually inspected bi-
annually for debris, wear, damage, leaks, or other potential problems. In general, for a properly utilized
system, septic tanks should be pumped and inspected every 2 - 4 years. The effluent filters should be
cleaned every six months and at the time of pumping. Absorption fields should be maintained with
suitable cover and kept free of root invasive plants. Positive surface drainage away from the absorption
field should be maintained.
If you have any questions or need any additional information, please call.
Sincerely,
SOPRIS ENGINEERING, LLC
Paul Rutledge
Design Engineer
Cc: Steve Eichhorst, B & H Contractors
Sun \pcl\22050\as-builtl-isds.doc