HomeMy WebLinkAbout03815GARFIELD COUNTY BUILDING AND SANITATION DEPARTMENT
109 9th Streat Suite 303
Glenwood Springs, Colorado 81601
Phone (303) 945-8212
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Permit :.. 3815
Assessor's Parcel No.
~ INDIVIDUAL SEWAGE DISPOSAL PERMIT
This does not constitute
a building or use permit.
> PROPERTY l "°Sll'h '. ..... ~~~l:!i'
( System Locatlon4S ~ J
Present Address l('y..,,...._5'_,,._..1.=-:S::.,,3!-'+---"-G_......t .... :f:>"'='---Phone 3J9-'545'1--s: V=
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, Legal Description of Assessor's Parcel No. __ _,,8"""""-'-l _l,_9_._-_3.._LL-'1~3._,_-_D:"),,_....__,__-_4--"CX"::i .... !>...L.. ____________ _
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SYSTEM DESIGN
______ Septic Tank Capacity (gallon) ______ ,Qt her
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Required Absorption Area -See Attached
Number of B7ooms .AA
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______ Percolation Rate (minutes/inch)
Special Setback Requirements:
Date _____________ Inspector ___________________________ _
~ FINAL SYSTEM INSPECTION AND APPROVAL (as installed)
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Call for Inspection (24 hours notice) Before Covering Installation
System Install~""-----------------------------------------
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 Nam~--------------------------
Adequate compliance with County and State regulations/requirements _____________________ _
Other __________________________ ~-------------~
Date_~lL-·+)::...:/c_-.:_l>_,_{ ___ Inspector l?y h1t"' ear ?a~ I E. f( I.A. f I eJre-
RETAIN WITH RECEIPT RECORDS AT CONSTRUCTION SITE
*CONDITIONS: \
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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. ;
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This permit is 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.
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 co'mmits a Class I, Petty Offense ($500.00 fine-6
months in jail or both).
White· APPLICANT Yellow -DEPARTMENT
IND MDU AL SEWAGE DISPOSAL SYSTEM APPLICATION
OWNER /3~'}-l Oa.rdy..,.:ef ,'
ADDRESS f3ox /S:3l/ Q ;)~
CONTRACTOR -.S i:
PHONE i'7o -'/3o '171?
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ADDRESS _______________ _ PHONE ____ _
PERMIT REQUEST FOR QO NEW INST ALLA TI ON ( ) 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 holes, soil profiles in test holes (See page 4).
LOCATION OF PROPOSED FACILITY:
NearwhatCityofTown .51/f SizeofLot 3S-, '-1,Y Qc./'<:.S.
Legal Description or Address 9 "TZ 9 C, I?.., 3 31 S,. / f Cc f'I (;, S-2.
WASTES TYPE: ()<) DWELLING ( ) TRANSIENT USE
( ) COMMERCIAL OR INDUSTRIAL ( ) NON-DOMESTIC WASTES
()OTHER-DESCRIBE _______________ _
BUILDING OR SERVICE TYPE:_~{~-e.~s--'.d~e_N~V"--~-----------------
Number of Bedrooms </ Number of Persons 2--~---
P<J Garbage Grinder ()cf Automatic Washer ()efDishwasher
SOURCE AND TYPE OF WATER SUPPLY: ()q WELL ( ) SPRING ( ) STREAM OR CREEK
If supplied by Community Water, give name of supplier:
DISTANCE TO NEAREST COMMUNITY SEWER SYSTEM: S X M 1 /e S
Was an effort made to connect to the Community System? __ IV--1',/,--'A-~'---· _________ _
A site plan is required to be submitted that indicates the followin2 MINIMUM distances:
Leach Field to Well: 100 feet
Septic Tank to Well: 50 feet
Leach Field to Irrigation Ditches, Stream or Water Course: 50 feet
Septic System (septic tank & disposal field) to Property Lines: 10 feet
YOURINDMDUAL SEWAGE DISPOSAL SYSTEM PERMIT WILL NOT BE ISSUED WITHOUT
A SITE PLAN.
GROUND CONDITIONS:
Depth to first Ground Water Table ______________________ _
Percent Ground Slope __________________________ _
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TYPE OF INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED:
(ii> SEPTIC TANK ( ) AERATION PLANT ( )
( ) VAULTPRIVY ( ) COMPOSTINGTOILET ( )
( ) PIT PRIVY ( ) INCINERATION TOILET ( )
VAULT
RECYCLING, POTABLE USE
RECYCLING, OTHER USE
( ) CHEMICAL TOILET( ) OTHER-DESCRIBE. ______________ _
Fr DISPOSAL BY:
( ABSORPTION TRENCH, BED OR PIT ( ) EV APOTRANSPIRATION
( ) UNDERGROUND DISPERSAL ( ) SAND FILTER
( ) ABOVE GROUND DISPERSAL ( ) WASTEWATER POND
( ) OTHER-DESCRIBE
WILL EFFLUENT BE DISCHARGED DIRECTLY INTO WATERS OF THE STATE? ----
PERCOLATION TEST RESULTS: (To be completed by Registered Professional Engineer, if the Engineer does the
Percolation Test)
Minutes ____ _,.er inch in hole No. 1 Minutes _____ .,.er inch in hole No. 3
Minutes er inch in hole No. 2 Minutes. _____ _,.er inch in hole No.
Name, address and telephone ofRPE who made soil absorption tests: -------------
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Name, address and telephone ofRPE responsible for design of the system: ----"'-'"'O><-rf'-'-r-'-1-"~--'6='-/J"f''a.,._.__• __ _
Applicant acknowledges that the completeness of the application is conditional upon such further mandatory and
additional tests and reports as may be required by the local health department to be made and furnished by the applicant
or by the local health department for purposed of the evaluation of the application; and the issuance of the permit is
subject to such terms and conditions as deemed necessary to insure compliance 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 correct to the best of my knowledge and belief and are designed 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
falsification or misrepresentation may result in the denial of the application or revocation of any permit granted based
upon said application and in legal action for perjury as provided by law.
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; . ' Sign~ .2 cL-Date_'o""'-~(=D~·_,O"-"'<:,~-----
PLEASE DRA,,W AN ACCURATE MAP TO YOUR PROPERTY!! ------
Beth Dardynski & Jim Croy
P.O. Box 1534
Glenwood Springs, CO 81602
RE: Proposed OWS System, 4929 C.R. 331, Dry Hollow, Garfield County, CO
SE Job No. 23071.01
Dear Beth & Jim:
Pursuant to your request this letter/report presents our findings in regard to the feasibility and design of an
engineered Onsite Wastewater System (OWS) for the above referenced Site. This design is based on our
evaluation of the site conditions with information provided by others for use in supporting your application
to Garfield County. Our recommendations are in accordance with Garfield County and the State of
Colorado ISDS Regulations. Garfield County must permit any proposed improvement to the site. We
have reviewed the information forwarded to us, conducted a site visit, 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 a
new 1250 gallon septic tank be installed that will discharge effluent to a 700 square foot soil absorption
trench system. The soil absorption system can be installed in natural soils and will be located within the
required setbacks down gradient of the proposed house, as delineated on the attached plan. The system
will meet all required setbacks and be installed within the general boundaries indicated on the plan. Our
Design is outlined below and delineated on the attached site plan.
Site Location and Existing Conditions
The subject site is located at 4929 County Road 331 (Dry Hollow Creek Road), in Garfield County,
Colorado. The site is situated on Parcel N, in Section 34, T 6 S, R 92 W of the 6'h P.M. The Site
comprises approximately 30 acres. The site is bounded on the North, South and West by agricultural and
range lands with scattered single-family homes with C.R. 331 to the east. The Building site on the site has
gentle to moderate slopes (3%-12%) toward the west. The site is covered with pasture grasses, weeds,
along with scattered cottonwood, juniper and pinon trees. Domestic water will be supplied by a well.
Proposed Site Conditions
It is our understanding that you intend to construct a 4-bedroom home. The maximum number of rooms in
the proposed home that could be utilized as bedrooms is 4. The proposed improvements will include a
new OWS system with appropriate site grading. The new structure is to be generally located as shown on
the plan.
502 Main Street• Suite A3 •Carbondale, CO 81623 • (970) 704-0311• Fax (970) 704-0313
SOPRIS ENGINEERING llC civil consultants
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Subsurface Conditions
Beth Dardynski & Jim Croy
SE Job No. 23071.01
July 29, 2004
Page2
A subsurface investigation and percolation test was conducted in June 17, 2003 by CTL Thompson, Inc
(CTL). The subsoil encountered at the site consists of 1 foot of topsoil overlying sandy clay to an observed
depth of 9 feet. Groundwater was not encountered in the borings.
Percolation testing utilized three test holes, which yielded similar absorption rates. The average
percolation rate is 60 minutes per inch and is suitable for a conventional absorption system.
Design Criteria
The design flow is calculated as follows:
Single family home -equivalent 4 bedroom population@ 2 person /bedroom = 8 persons.
From the Garfield County I. S. D. S. Regulation:
Max. Design flow (Qd) =#of people x (avg. flow) x 1.5 gal/person/day.
Gallons per day per person for the subject house = 75 gal/person/day
Assume 8-person population
Qd = 8*75*1.5* =90 gal/day
Septic Tank Design
Based on Design Flow Qd.
Qd = 900 gal/day
Volume (V) of tank= Design Flow• 1.25
(30 hour retention time)
V = 90 gal/day • 1.25 days = 1125 gallons
Use one 1250-gallon dual compartment concrete septic tank
Soil Absorption System Design
Beth Dardynski & Jim Croy
SE Job No. 23071.01
July 29, 2004
Page3
The field is sized by using the standard absorption area equation. A soil absorption trench system,
utilizing gravelless chambers is recommended. The State allows a 50% area reduction for the use of
gravelless infiltration chambers in a trench configuration. The chamber units may be installed in native
soils. Soil replacement with sand may be used in select locations if any scattered cobbles or rocks are
encountered.
Based upon the design percolation rate, the standard absorption area equation is:
A (SF)= Qd *(t) y, : where
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A =Area; Qd = Design flow (gal/day)
t = time in minutes
This design calculation results in a recommended minimum absorption area:
A= 900 *(20) i.; = 1394 sq. ft.
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Apply a 50% reduction for utilizing gravelless infiltration chambers in a trench configuration.
1394 x 0.5 = 697 sq. ft.
Assume 15.5 square feet per chamber: 697 sq.ft. = 45 chambers Use 45 chambers
15.5 sq.ft/chamber(50%)
Use 698 SF of trench with gravelless chambers: Assume 3-foot wide trenches with 6.25-foot long chamber
units.
We recommend using a trench system composed of three 94 feet long and 3 foot wide trenches, containing
15 standard leaching chamber units in each trench. Excavate absorption trenches to accommodate a
minimum 698 SF of interior surface area.
Effiuent Distribution System
A gravity distribution system will be utilized to transport effluent from the new concrete septic tank to a
distribution box and to the head chamber of each trench via an individual distribution line. An effluent
filter will be installed in the secondary compartment of the septic tank to reduce suspended solid loading to
the absorption trenches and extend the life of the treatment media in the trenches. A 4" PVC effluent line
will discharge effluent to a distribution box installed level, up gradient and adjacent to the trenches. The
4" PVC line will be installed with a minimum 2% slope. The effluent will be equaily distributed from the
distribution box through individual distribution pipes to each trench in the system. The inlet in the
distribution box should have a tee or a built in baffle to dissipate the influent velocity and insure equal
distribution into each outlet discharge pipe. The discharge pipes will connect to the head of each chamber
row. Appropriate chamber end plates shall be installed on the inlet ends to prevent scouring of the trench
bottom surface. An inspection port should be installed on the top mid-point cut out at the end chamber in
each comer trench. This will mark the field and allow for checking the performance of the system over
time.
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OWS Operation and Maintenance
Beth Dardynski & Jim Croy
SE Job No. 23071.01
July 29, 2004
Page4
The engineered system shall be inspected on a regular basis and be properly maintained. The
responsibility for repair and maintenance of the system will remain with the Lot Owner. The owner shall
inspect the OWS and perform maintenance and repairs necessary to ensure that the system is operating
properly. The effluent filter shall be maintained when the tank is pumped or as needed. Suitable
component handles and extensions on the filter assembly will be installed to provide easy maintenance.
We recommend a periodic inspection 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 Garfield 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.
3) Add a two-way clean out on the service lines from the house and detached barn.
4) The system shall be plumbed to distribution effluent into the trenches with equal distribution.
5) The contractor shall ensure that the concrete septic tank 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.
7) The leaching chambers shall be installed level in each trench. A splash plate shall be installed on the
trench bottom surface below the inlet in each 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.
Beth Dardynski & Jim Croy
SE Job No. 23071.01
July 29, 2004
Page5
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 OWS.
If you have any question or need any additional infonnation, please call.
Sincerely,
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Paul E. Rutledge
De .
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OWS SYSTEM NOTES
1. ALL MATERIALS AND INSTALLATION SHALL CONFORM TO STATE AND
COUNTY INDIVIDUAL SEWAGE DISPOSAL SYSTEM (ISDS) REGULATIONS.
2. IT IS lHE RESPONSIBILITY OF THE CONTRACTOR TO CONTACT ALL
UTILITY COMPANIES FOR FIELD LOCATIONS OF UTILITIES PRIOR TO
CONSTRUCTION AND EXCAVATION.
3. ALL SEWER LINES TO BE SDR-35 OR SCHEDULE 4D P. V.C. PIPE UNLESS
NOTED OTHERWISE.
4. INSTALL A TWO-WAY CLEAN OUT ON THE SERVICE LINE FROM THE HOUSE.
5. THE SEPTIC TANK SHALL BE INSTALLED LEVEL ON COMPACTED EARTH. INSTALL
WATERTIGHT RISERS AS NECESSARY TO BRING ALL REQUIRED ACCESS
POINTS TO THE FINISHED SURFACE GRADE. PROVIDE BOUANCY COMPENSATION
IF GROUNDWATER LEVELS WILL RISE ABOVE THE BOTTOM OF THE TANK.
6. A SANITARY BAFFLE TEE IS REQUIRED ON THE SEPTIC TANK INLET AND OU7LET.
INSTALL THE INLET AND OU7LET TEES PLUMB ANO IN A POSITION TO ALLOW
EASY INSPECTION AND MAINTAINANCE OF TANK FROM THE TANK RISERS.
7. WE RECOMMEND THE INSTALLATION OF A 4• EFFLUENT FILTER CONTAINED IN THE
4" BAFFLE OUTLET TEE OF THE SEPTIC TANK. THE FILTER SHOULD BE
INSPECTED EVERY SIX MONTHS. lHE EFFLUENT FILTER SHALL BE MAINTAINED
AND CLEANED WHEN THE TANK IS PERIODICALLY PUMPED OR AS NECCESSARY.
INSTALL A SUITABLE EXTENSION ON 1HE FILTER WITH A HANDLE TO BE WllHIN
6" BELOW THE ACCESS LID.
8. THE CONTRACTOR SHALL ENSURE THAT THE SEWER LINES, SEPTIC TANK AND
RISERS ARE WATERTIGHT. ALL PLUMBING FIXTURES AND OWS COMPONENTS
SHALL BE INSTALLED AND MAINTAINED TO AVOID SURFACE OR GROUNDWATER
FROM ENTERING THE SYSTEM AND TO PREVENT LEAKAGE FROM THE SYSTEM.
IN-HOUSE PLUMBING FIXTURES SHALL BE MAINTAINED TO PREVENT EXCESS
WATER FROM ENTERING THE SEPTIC SYSTEM.
9. lHE DIMENSIONS AND NOTES SHOWN ON THE PLAN INDICATE MINIMUM AREA,
LENGTH, WIDTHS ANO SEPARATION DISTANCES FOR THE TRENCHES, BED OR
MOUNDED ABSORPTION FIELD.
10. THE ABSORPTION TRENCHES SHALL BE EXCAVATED TO LEVEL GRADE IN
NATIVE EARTH. STANDARD LEACHING CHAMBERS WILL BE PLACED IN THE
TRENCHES OVER THE NATIVE SOIL. THE TRENCH BOTTOM AND SIDE WALLS
SHALL BE SCARIFIED AND/OR RACKED IF SMEARING OCCURS.
11. THE LEACHING CHAMBERS SHALL BE INSTALLED LEVEL WllH A MINIMUM
COVER OF 10 INCHES NOT TO EXCEED 24 INCHES AND CONNECTED FOR
SERIAL DISTRIBUTION.
12. AN APPROPRIATE CHAMBER END PLATE OR A SPLASH PLATE SHALL BE
INSTALLED ON THE TRENCH BOTTOM BELOW EACH TRENCH INLET SHALL BE
INSTALLED TO PREVENT SCOURING. END PLATES SHALL BE INSTALLED ON
THE END CHAMBERS IN EACH TRENCH.
13. VERTICAL INSPECTION PORTS SHALL BE INSTALLED FROM THE CENTER PRE
MARKED HOLE ON THE TOP OF THE END CHAMBERS. (TYP. END OF EACH
ROW) THE PORTS MAY HAVE TREADED CAPS AT GRADE.
14. THE CHAMBERS WILL BE BACK FILLED WITH EXCAVATED MATERIAL VOID OF
ROCKS, THE BACK FILL MATERIAL SHAU NOT EXCEED 2 1/2" DIAMETER AND
SHALL BE PLACED TO AT LEAST 6 INCHES ABOVE THE TUP OF THE
CHAMBERS. THE TOP OF THE PLACED BACK FILL SHALL BE COVERED WITH A
LAYER OF FILTER FABRIC. A MINIMUM 4• DEPTH OF TOPSOIL IS TO BE
PLACED ABOVE THE BACK FILL TO THE SURFACE.
15. ALL INSTALLATION OF LEACHING CHAMBERS SHALL BE IN CONFORMANCE
WITH THE MANUFACTURES INSTALLATION INSTRUCTIONS.
16. THE ABSORPTION TRENCHES/BED OR MOUND MUST BE GENERALLY MARKED
AT THE FOUR CORNERS WITH INSPECTION PORTS AND/OR BURIED REBAR.
THE FIELDS MUST BE PROTECTED FROM VEHICULAR AND LIVESTOCK TRAFFIC.
f o I ··-',,,. .. 1_,," ""'I I'"•'"''" ... 'oil •l ;·, ... _.,.1 ,1_,._..,_,l ..,._ .,_., ... ,.,,.._ ....... ,.., • .._.,,
SURFACE DRAINAGE AWAY ffiOM THE MOUNDED FJELD.
18. THE ENTIRE ABSORPTION FIELD SURFACE MUST BE REVEGATATED.
19. 'THE ABSORPTION' FIELD SHALL BE INSTALLED PER THE REQUIRED SEIBACK
DISTANCES:
10 feet from any property line.
25 feet from any potable water supply line or intermittent drainage.
20 feet from any occupied dwelling.
100 feet from on y well, spring or cistern.
50 feet from any stream or water course.
DISTRIBUTION SYSTEM
20. EFFLUENT Will GRAVITY DISCHARGE THROUGH THE OUTLET BAFFLE TEE
FROM THE SECONDARY COMPARTMENT OF THE SEPTIC TANK TO A
DISTRIBUTION BOX. THE DISTRIBUTION SYSTEM SHALL DISTRIBUTE FLOW
EVENLY TO EACH CHAMBER TRENCH ROW. THE MINIMUM SLOPE OF THE
DISCHARGE LINE FROM THE TANK TO THE DISTRIBUTION BOX SHALL BE
INSTALLED AT A MINIMUM 2% SLOPE. THE INDIVIDUAL DISTRIBUTION LINES
SHALL BE INSTALLED AT A MINIMUM OF 1% SLOPE.
21. THE CONNECTING DISTRIBUTION LINES SHALL BE INSTALLED AT A MINIMUM
OF 1% SLOPE TO THE INLET OF EACH TRENCH ROW. ALL DISTRIBUTION
PIPING, CONNECTIONS AND FITTINGS SHALL BE WATERTIGHT AND INSTALLED
TO INSURE EQUAL DISTRIBUTION THROUGH THE SYSTEM.
GENERAL N01ES:
1. THE OWS SYSTEM AS SHOWN ON THE PLAN AND THE DETAILS WERE
DESIGNED BY SOPRIS ENGINEERING. THE EXISTING LOT CONDITIONS
AND IMPROVEMENT WAS PROVIDED BY !HE OWNER.
NO. DAT REVISION BY
RESIDENCE
4929 COUNTY ROAD 331
GARFIELD COUNTY, CO
CROY/DARDYNSKI RESIDENCE
ONSITE WASTEWATER SYSTEM
SITE PLAN AND SYSTEM DETAil..S
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DISTRIBUTION LINES
AT MINIMUM 1% SLOPE
PROPOSED BUILDING
EFFLUENT DRAIN LINE
AT MINIMUM 2% SLOPE
1500 GAL. SEPTIC TANK
EFFLUENT DISCHARGE LINE
AT MINIMUM 1% SLOPE
DISTRIBUTION BOX
BURIED REBAR TO
MARK LOCATION
CROSS SECTION SYSTEM DETAIL
23071.(
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I GRAPHIC SCALE
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t REQUlfWf£HTS. tH£ SVSm.t SHM.1. BE PLU'llm FOR I EQUN. DISTRJBU1ION. lHE CHAMBERS IN fMi-1
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BOTTOM £L£VATKIN OF EACH TIUlK:H MAY VARY W
ACJflOE A MAXIMUM D£Plff Ot 36 INCHES TO THE
BOlTOM SURFACE BE...0W 1Ht PROPOSED GRADE.
LAYOUT OF' PROPOSED lRENCH£S NC
SOfl CONIJl1tONS ro. BE WPR0\$0 BY
'SHE £NOl:HttR. /.MY MOOIFICA llOHS TO
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DURING <Xlf<S1RUCTI<lH.
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PROPOSED DRIVEWAY
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NOTE: £MN RUN OF CHAMBtRS l.WST 8£ U:VU..
IN!£T ANO £ND CAP TO BE USE'D ON EACH tND
CHAMBf:R. INSTAU. .f." PVC fNSPE;CTION PORT
S'fADARO CAPACITY
INflLlRA10R C\.tMABt.R {TYP.}
W/ CAP ON EITHER OIJJ CHAMSER OF' EACH TR£Nctt.
MAff.ITAIN 6' Of UNOr$11JRBED SOIL BETWEtN
TRENCHES. THE lRENCH BOTrOM tl..£VA TION oF
AfJJACENT mENaifS MAY VARY. A~AGE DEPTH OF
TR.ENON BOTrOM SMALL Nor Exctto J6 ff.ICH(S.
SCARJl''t /11ll .. 8011GM SURF.AC( f(l
A O(PTH OF J" ANO RAKE i.£\IEL
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MIN. Al.AX.
INFILTRATOR CROSS SECTION DETAIL t
Beth Dardynski & Jim Croy
P .0. Box 1534
Glenwood Springs, CO 81602
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RE: As-Built OWS System4929 C.R. 331, Dry Hollow, Garfield County, CO
SE Job No. 23071.01
Dear Beth & Jim:
September 21, 2004 I
Pursuant to County Regulations, this letter provides documentation that the new OWS system recently installed is in general
compliance with the permitted design. Sopris Engineering has performed site visits to measure, inspect, and document the as
built conditions of the constructed system. The system was inspected prior to backfilling and after all installations were
completed. The as-built conditions and installation of the new OWS components is in compliance with the permitted design
specifications for the system.
The septic tank, distribution pipe, and absorpn'on field installations are in accordance with Garfield County Regulations, the
design presented in the Sopris Engineering Report and the design drawing, dated July 29, 2004. A 1250 gallon dual compartment
septic tank was installed with 4" tee baffles.
The absorption field was constructed with a total of 45 standard leaching chambers in a trench configuration with (3) 94'long
trenches containing 15 chambers each. The chambers were backfilled with native soil. Each trench was installed level.
Inspection ports were installed on each corner end chamber. The chambers were installed in suitable soils consistent across the
field. The field has individual distribution lines to each trench from a concrete distribution box. The distribution box was
installed level on compacted ground and is marked with a buried piece of rebar. The minimum setback distances have been
maintained. Additional observations of the soils within the field were performed during construction indicating that the soils are
consistent with the description in the geotechnical report. No ground water was encountered to a depth of 10 feet.
OWS Operation and Maintenance
All components of the engineered OWS shall be inspected on a regular basis and be properly maintained. The re establishment
of vegetative cover over the field and responsibility for inspection and maintenance of the system will remain with the Lot
Owner or the owners representative. The owner shall periodically inspect the OWS and to perform all maintenance and repairs
as necessary to ensure that the system is in good operating condition and performing as designed.
The OWS 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, sanitary tees and effluent filter should be visually inspected bi-annually for
clogging debris, damage, leaks, or other potential problems. In general, for a properly utilized system, septic tanks should be
pumped and inspected every 2 - 4 years. Absorption fields should be maintafoed with suitable vegetative cover and kept free of
root invasive plants. Positive surface drainage away from the absorption field should be maintained.
If you have any question or need any additional information, please call.
Sincerely,
SOPRIS ENGINEERING, LLC
~~~::> /~.~'::L Paul E. Rutledge
Design Engineer
J 502 Main Street • Suite A3 • Carbondale, CO 81623 • (970) 704-0311 • Fax (970) 704-0313 I
SOPRIS ENGINEERING LLC civi I consultants