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GARFIELD COUNTY BUILDING AND SAN ITATION DEPARTMENT
108 Eighth Street, Suite 201
Gl enwood Springs, Col oradof 81601
Phone (970) 945-8212
INDIVIDUAL SEWAGE DISPOSAL PERMIT
PROPERTY
Permit 40 1 9
Assessor's Parcel No.
This does not constitute
a bu i lding or use permit.
g d.-7 -2554 4· ~~~'-¥1-l--.l--{>-L'--'--L--~~ne 9 (J 8"-39 7 ~
SYSTEM DESIGN
______ Septic Tank Capacity (gall on) ______ Other
------Percol ation Rate (minutes/inch) Number of Bedrooms (or other) ____ _
Required Absorption Area -See Attached
Specia l Setback Requirements:
Date _____________ Inspector ___________________________ ___
FINAL SYSTEM INSPECTION AND APPROVAL (as installed)
Call for Inspection (24 hours notice) Before Covering Installation
Sy stem Installer _________________________________________ _
Septic Tank CapacitY----------------------------------------
Septi c Tank Manufacturer or Trade Name --------------------------------
Septic Tank A ccess within 8" of surface ---------------------------------
Absorption Area -----------------------------------------
Absorption Area Type and/or Manufacturer or Trade Name--------------------------
Adequate compliance with County and State regulations/requirements
Dote {:~-S -o1 '"'•"'o' bn~ fJaJ ~ Other---.--------------~+--------~-~-~r-~~~----------
RE TA IN W ITH RECE I PT ~oRifsATCONSTRUCTION SITE
•CONDITIONS:
1. All installation must comply with all requirements of the Colorado State Board of Hea l th Individual Sewage Di sposal Systems Chapter
25 , Articl e 10 C.R.S. 1973 , Revised 1984.
2. This permit is valid only for connect ion to structures which have fully complied with County zon i ng and bui l ding requirements. Con-
nection to or use with any dwelling or structures not approved by the Building and Zoning office shall automati cally be a violation or a
requirement of the perm it and cause for both legal action and revocation of the permit.
3. Any person who c onstructs, a lters, or installs an ind ividual seWage disposal sys t em in a manner which involves a knowing and material
variation from the terms or specifications contained in the appl ication of permit comm its a Cl ass I, Petty Offense ($500.00 fine-6
months in jail or both).
White -APPL ICANT Yellow -DEPARTMENT
INDIVIDUAL SEW AGE DISPOSAL SYSTEM APPLICATION
OWNER < l j l Y C fJ()5S[9AIJ
ADDREss tao E Ll< RoN N ftJ£-ti IZ9 PHONE 927-~fqJ
CONTRACTOR /).,;s. CDA)S (/JJ C 1 1utU !YJ/f111)6~;1]wt
ADDRESS f t6 l ( ~i~ I At 3tft1J6L. ;)C.( UG PHONE ~2 ~y' ) c.; 7 2-
PERMIT REQUEST FOR (')() NEW 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 well s, soil percolation test holes , soil profiles in test holes (See page 4).
LOCATION OF PROPOSED FACILITY:
Nearwh atCityofTown C AI2f\Jt.)/V-IIf SizeofLot )~ I?C!<.c L
LegalDescriptionorAddress LOl 2L/ l/t6i/ rf~E:.J J~Gtf
WASTES TYPE: ~ DWELLING ( ) TRANSIENT USE
( ) COMMERCIAL OR INDUSTRIAL ( ) NON-DOMESTIC WASTES
( ) OTHER-DESCruBE ________________________________ _
BUILDINGORSERVICETYPE: SiY2t-c FM1tt-7 ;&:)/O.!/lCc
Number of Bedrooms f N umber ofPerson s ---------
( v{ Garbage Grinder ( 0 Automatic Washer ( v1'i)ishw asher
SOURCE AND TYPE OF WATER SUPPLY: (v(WELL ( ) SPRING ( ) STREAM OR CREEK
If supplied by Community Water, giv e name of supplier:
DISTANCE TO NEAREST COMMUNITY SEWER SYSTEM: I / m lL r 5 ~--~~-----------------
Was an effort made to connect to the Community System? ----'--;1)-1-~~d-+-------------
A site plan is required to be submitted that indicates the following 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
Y OUR INDIVIDUAL SEWAGE DISPOSAL SYSTEM PERMIT WILL NOT BE I SSUED WITHOUT
A SITE PLAN.
GROUND CONDITIONS:
Depth to first Ground Water Table ___ 7J..L......:::c '-'u=-· --~....15.-'i=--£_i ________________________________ _
P ercent Ground S l ope _-=5~LY""'"'_ -------------------------
2
TYPE OF INDIVIDUAL SEWAGE DISPOSAL SYSTEM PROPOSED :
(\.)/ SEPTIC TANK ( ) AERATION PLANT
( ) VAULTPRNY ( ) COMPOSTING TOILET
( ) PIT PRIVY ( ) INCINERATION TOILET
( ) CHEMICAL TOILET( ) OTHER-DESCRIBE
FINAL DISPOSAL BY:
( \/ ABSORPTION TRENCH, BED OR PIT
( ) UNDERGROUND DISPERSAL
( ) ABOVE GROUND DISPERSAL
( ) VAULT
( ) RECYCLING , POTABLE USE
( ) RECYCLING , OTHER USE
( ) EVAPOTRANSPIRATION
( ) SAND FILTER
( ) WASTEWATER POND
( ) OTHER-DESCRIBE _______ ~-----------------
WILL EFFLUENT BE DISCHARGED DIRECTLY INTO WATERS OF THE STATE? 1J0
PERCOLATION TEST RESULTS: (To be comp leted by Regi stered Profess ional Engineer, ifthe Engineer does the
Percolation Test)
Minutes I 2. D
Minutes t C1 ?
per inch in hole No. 1
per inch in hole No. 2
Minutes /, f per inch in hole No. 3
Minutes. ______ p.er inch in hole No. _
Name, address and telephone ofRPE who m ade soil absorption tests:~-----~~------
Y1tt/ L 7' /V!CdOL ScP(!I c) ~"" cNGtt\..-.:ct:J~c
Name, address and telephone ofRPE responsible for design of the system: 1)1 2 mA1AJ ~ ,-, S" /C.. fj 3
(!!ffi/W!V t)/fL€ I ( u 't I b 2 5
o/$ 70'-/-u -:s I I
Applicant acknowledges that the completeness of the application is conditional upon such further mandatory and
additional tes ts and reports as may be required by the local h eal th department to b e made and furni shed by the applicant
or b y the local.health department for purposed of the evaluation ofthe application ; and the issuan ce of the permit is
subj ect to such terms and conditions as deemed necessary to insure compliance with rules and regu lations 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 b es t of my knowl edge 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 mi srepresentation may resul t in the denial of the app lication or revocation of any permit granted based
upon said application and in legal action for perjury as provided by law.
Signed {~~ Date /!-.Lj --0 L /
PLEASE DRAW AN ACCURATE MAP TO YOUR PROPERTY!!
3
1
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A ' ''0 ''()0~ I . · nLIQLISt ,, , c. , I
L-;----·----------------···------~-···--·-··-·-·------------------------------·-·--·---·---·--·-----------·---
David Blair
DB Con:;trndiOI; l\1ana8emcnt
521 Hillcrest Drive
Basalt, CO 81621
RE: Crossiand Residcnce-Onsiie \Vastewater ::::ystem (0\VS) design -Lot 24, High Aspen Ranch)
Garfield County, CO
SE Job No. 24044.01
Dear David:
Pursuant to your request this letter presents our findings in regard to the feas;bilily and design for an Onsite
Wastewater System (OWS) at the above referenced Site. Our evaluation of I he site conditions is based on
informal ion provided by you and others for use in supporting your application to Garfield County. Our
findings and recommendations are in accordance vith Garfield County and the State of Colorado ISDS
RcguL\iions. We have reviewed the gco technical/geological report, the site conditions, building plans,
and created an OWS design plan with construction details as part of our scope of work.
Based on our findings we believe that the design and installation of an approved OWS is feasible in
accordance with the Regulations of the County and the State of Colorado. We recommend that the OWS
include a new 200(r-gallon septic tank to be installed with an effluent filter. Effluent will gravity discharge
to an engineered soil absorption trench system utilizing a syuthetic absorption/trcatmcn'-media in trenches
with deep graveL We recommend the use of a distribution box to equally distribute eff'luent to perforated
distribution lines running the length over the absorption media alon[·, each trench. The UWS will meet all
req,,ired setbacks and be installed within the general location south u' the proposed buildings as delineated
on the plan. Our design is outlined below.
The subject site is located at 1061 Overlook Drive on Lot 24, in the High Aspen Ranch Subdivision in
Garfield County, Colorado. The site is situated in Section 25 ,<;c '!.6, T 6 S, R 88 W of the 6 1h ''.M. The
site is bounded by un-developed mountain JaneL
Y,xis£!.ng Site Cqnditions
The site is located on undeveloped, mountainous terrain and in partially forested area. Tbe Site comprises
approximately 35 acres with a building envelope area on top of a broad knoll that is about 10 feet higher
than the surrounding terrain. The site has moderate to steep slopes (10%-40%). The existing ground
surface in the proposed absorption field area has an approximate slope of 20% toward the northwest. The
site is vegetated with grasses, sagebrush, scrub oak, with areas of moderately thick aspe ' tJ\ces. Dor!\estic
water will be supplied by 1 proposed welL
iOPRIS ENGINEERING • llC civil consultants
David Blair
SE Job No. 2A0·1<1.01
August 30, 2004
Page 2
It is our understanding that you intend to construct a 2 level, 6-beclroom home. The proposed
improvement,; will inc: ude a new OWS systern with appropriate site grading. The proposed absorption
fidel area has •;rritable wil for receiving effluent treated through a select media in proposed trenches. The
absorption area will be increased by select soil 1 eplacemcnt in the excav<lted trenches. The pcrcolatirm
rates of the in-situ clay s·.1ils are extremely vari blc and the usc of tlr na! JC soil for conventional
secondary treatment is marginal. Therefore we believe it is desirable to l! 11 :izc an advanced type of
absorption/tre::tment trench system for grod secondary treatment of the effluent.
A subsurface investigation conducted on Jannary 29, 2004 by Hepworth-Pawlak Geotechnical, Inc. (VP).
The HP report is elated February 18, 2004, Job Number 104 124. The subsoil encountered at the site in the
vicinity of the proposed absorption field consists of 1.5 feet of topsoil overlying very stiff clay, to
approximately 10', overlying stiff to dense clay and gravel with cobbles and probable boulders al the
refusal depth of 10 feet in the profile pit. Groundwater was not e1 c·ountered to a depth of 10 feet in the test
profile pit at the time of the investigation.
Percolation testing, in the preferred absorption area, utilized three test lnles 28-36 inches deep and yielded
varying absorption rates. The slowest measured rate ·vas 120 minutes per inch and the fastest measured
rate was 'ess than 1 minute per inch. The average percolation rate is approximately 60 mir''Jtes per inch.
A rate of 60 minutes per inch js used in the design caiculations ilased on the soils permeability to accept
treated water. We expect the clay soils to be adequate to allow infiltration of the design volume of eft1uent
treated by the synthetic and select imported 1nedia. /\dditional testing and evaluations will be pcrfonr1ed
during construction to verify the design assr11nption and possibly recommend design changes during
construction.
HP will need to provide continued consultation and field services during con:.truction to review and
monitor the implementation of their recommendations and to provide additional analysis, observation of
excavations and testing as needed.
We believe that the installation of the absorption field with a sc lect media and installation of the
distribution pipes will provide effective treatment of the efflueiJt applied and the large infiltration surfaces
in the trench will recover the treated design flows. The bio mat will be limited to the In Drain units and
sand interface and will not form over the broad native soil infiltration surface.
David Blair
SE Job No. 2.4044.01
August 30, 200·'
Pagl: 3
The proposed home will mve 6 bedrooms. The proposed OWS design is for a maximum of 6 bedrooms.
The des • •;n flow ic: calculated as follows:
Single f;:mi!y horne--equivalent 6 bedroom population @ 2 ,JCrson /bedroom,-, 12 persons.
From the County J. S. D. S. Regulations:
Max. Design flow (Qd) ·~#of people x (avg. flow) x 1.5 f,<JC/person/day.
Gallons ~)er day per person for the subject house~ 75 gal/person/day
Assume maxi111um 6 people daily population
Od o• 6*75'''1.5* ~1350 gal/clay
Design flow Qd " 1350 gpd
Based on Design Flow Qcl.
Ocl = 1350 gal/clay
Volume (V) of tank~ Design Flow" 1.25
(:\0 hour retention time)
V ~ 1350 gal/clay * 1.25 days •• 1687.5 gallons
To provide additional volume for detention and p•.ssible 'uturc treatment components we
recommend that a minimum tank size of 2000 gallons be Installed.
Use one 2000-gall"n concrete or alternative fiberglass, dual compartment septic tank.
The effluent will be treated and recovered into the soils >y distribution throu!:',h soil absorption trenches
sized to provide (Jjllal distribution through the entire length and width of the trenches. The trenche~: shall
be designed to treat effluent through a :;ynthetic media installed with im 1,oried sand. The treated efJ 1ent
will disoerse through the sand and underlying imported gravel for absorption into the s11 rounding native
soils. F(Jr sizing the trench system we are utilizing the guidelines approved by the Stale of Colorado fo ·
sizing these <ypes of absorption trenches.
The prefe1 reel synthetic absorptio"/treatment media is the F!gen In-Drain leaching system, a 7" deep by 24"
wide symbetic distribution/treatment product, wi1ich efficiently distributes effluent over lire product's
entire horizontal and vertical surface areas. We do not anticipate that a convention:>! bio mat will form on
the trench bottom surface because the system is designed !o form bio mat in the syn: iretic media. The
sizing of the trench system is per the guidelines approved lly the State of Colorado for sizing of absorption
trenches incorpowting the Eljen ln·-Drain. Chc S<ate all owe'. an equivalency of 5.0 S.F. per line:·r foot of
trench.
David Blair
SE Job No. ?.4044.01
A ugnst 30, 2004
Page: t!.
The use of the Elgcn In-Drain leaching system ·-vill mitigate the long-term acceptance ·ate of the clay soil :
and the JlBiivc soils variable infiltration rates. Dasecl the soil conditions and proposed usage we
recomm ncl the use of 76 Eljen In-Drain ll!lits to be placed 111 4 trenches for a total of 912 sqnare feet of
horizontal dispersal area. This recommendation is b;,scd on general indications of the soil type, structure
and an assumed average percolation rate of 60 minutes per inch. Additional soil <•nalysis will be performed
prior 10 construction.
In general the nse of 8 units per bedroom :·or typical usage when installed in conventional soil conditiCinS is
recommended, however we recommend tl1e use of additional units based on soil and site conditions. Nc
also recommend placement of gravel 18" in depth below the sand layer underlying the Elgen ln-Drain
units. This additional granular material will increase the absorption area by 3 S.F. per lineal foot of trench.
Based upon the average percolation rate, I he standard ahsorption area equation yidcls:
A (S.r.) = (Q.cL'ill v,) x i.S: where A= Area; Qcl =flow (gal/day)
5 t = time in minutes per inch= 60
()d = 540 gpd
p, = o' 1350 *(60) v, = 202_1 sq. ft
5
Apply sizing credit reclnction of 5 SF equivalent absorption area per L.F. of 3' wide trench for Eljcn
In-Drain •lllits.
A( credit reduction), A I :J = 20') l I 5 = 418 L.F. trench
L= length of trend = 418 L P. of 3 'wide treHch
The In-Drain units are 4 fer! long, 2 feel wide installed with 6" of sand on either side.
Tirerefore lhe number of Eljen In"Dmin units required equals 418 L.F. I 4FT= 104 units.
Credit for additional absorption area is based on the trench length adjustment equation for deep gravel,
from the State ISDS regulations.
L=Length of trench utilizing Eljen In-Drain units= 418 L.F.
Ll=adjusted trench length for deep gravel infiltration
W=width of trench =3'
d=depth of additional gravel= 1.5'
L1 = Lx (W+2)/W+1+2d)
L1 = (418)(3+2)/((3+1+2(1.5)) = 298 L.F. of3'wide trench
Adjusted number of In-Drain Units:
Eljen In-Drain units required equals 298 L.F. I 4FT= 74.5 units. Use 76 units.
David Blair
SE Job No. 2A044.01
August30,2004
Page 5
Use 76 Eljen In-Drain units providing for a total bottom mea of trench equal to76 x 4c~ 304 L.F. x 3FT
wide = 912 S.F.l!orizon :tl area. The total infil!:Aivc suriace area is ')]2 S.F. horizontal plus
approximately 1312 sidewall area o= 2260 S.F. total infiltrative sm fao. area.
Use (4) 76FT long trenches with 19 units per each tn~nch.
The configuration would consist of 4 trenches 76 feet long by 3 feet wide utilizing 19 Eljen uwdel
EL00924 n-Drain units per trench. The trenches need to be over excavated to accomr"odatc l.S feet of :y:,
ind1 screened rock, 6 inches of :·:and, 7 inci1 deep In-Drain Unit, a minimum Ci" of gravel nver the In-Drains
and a minimum backfill of 12" inches to surface grade. The final backfill shall include Ci inches of graded
topsoil slightly mmmded over each trench placed to allow positive drainage away from the trench surface.
Each trench will be constructed level with successive trenches installed at a slighily lower elevation than
the preceding trench. The method allows for the sloped terrain, provides increased infiltrative capacity of
the system and provides enhanced treatment for long teP :1 acceptance rates of treated effluent into the
native soils. The trenches would be located north of the building envelope and constructerl parallel to the
contours. Ami aimum separation distance of 4 feet will be maintained between the indivi1'ual trenches.
Tile ned to assure equal distribution of treated effluent across the entire surface of the distribution media
will be Jdaximized by gravity distribution through the trench system. The transport line from the septic
tank to the absorptic>n field shall be 4" SDR-35 PVC routed to a distribution box. The individual 4'' PVC
distribution lines from the distribution box to each trench will connect to perforated distribution l!llcs
running th" length of each tn·nch. The trenches will be equally closed from the center to the terminal ends
utilizing a 4" diameter perfo, a ted pipe running the leJ·'~th of the trench. The perforated distribution pipe
will be installed on the center top of the In-drain units with the orifices oriented to drip at a diagonal
downw<:,d (5 an 7 o'clock). The distribution pipe, sand and the Tn-Drain units will be enveloped with filter
fabric over the underlying ;;, inch gravel. An inspection port should be · nstallcd on the ends of each
perforated distribution pipe 111 each trench.
D'wicl Blair
SE. Job No. 7A0,!4.01
August 30, 7.00~
Page G
The engineered system shall be inspcct<Od on a regular basis and be , >roperly 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 syst"m is in good operating condition and is in compliance with the
manufacturers performance requiren·· :nts. The comJJOnents of the OWS will be inspected within 30 d:1ys
of ileing placed into operation and thereafter every six •nonths. The effluent filter shall be maintained
when the tank is pumped or as needed. Suitable risers, lids, component handles and extensions on the lank
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 should require minimal maintenance. Several factors influencing the need for mainte1 ance
include: actual wastewater flows versus design flnws, the Jolumc of kitchen/domestic waste (excluding
human waste and toilet fl<•per), excessive househJ,!d chemicals and other toxic liquids. The tank,
absorption field and other applicable 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 atlhe 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.
Prio,· to construction of the permitted system the engineer should be cont;,cted by the contractor ;,nd owner
to provide adequate time to discuss the system components, answer gueslions, resolve any conflict issues
and schedule inspection site visits based on construction progress. Couliiy Rcgnhllions require that the
Design Engineers of record perform site inspections of the permitted system durru::'. construction and
provide "As-Built" documentation of the installed system to the County after construction is cornplc,te.
_General Notey:
1) All materials and installation practices shail conform to the County lndividnal Sewage Disposal
Regulations.
2) All sewer lines and distribution lines in the system shall be Schedule 40 or SDR-35 PVC unless
specified otherwise on the plans and shall be watertight.
3) Add a twu-way clean outs on the sewer lines at least every 100 fee! and/or at the bends.
4) The system shall be plumbed to distribute effluent into the trenches with equal distribution.
5) The contractor shall ensure that the concrete or fiberglass septic tank is watertight and installed per the
manufactures recommendai ions.
6) The trencJ, mea must be protected to prevent damage from vehicular or livestock traffic and graded to
allow surface water to runoff the top and around the trenches.
David 11air
SE Job No . 2t:.o~~4 .0 i.
i\ngu st 30, 200·'1
Pa!!r. '"/
'-'
7) Th e In-Drain units shall be installed level in each trench. T he perforate d dis tributio n p ipe , sand and the
ln··Drain u ai t~; wiH be env eloped w.ilh fill er fabric to prevent the m i:rralion of Cine~~.
8) A final co v~.:r of soil suitabk for vcgciD.tton, a minirnum G" de ep srliii l be placed to th e finished surf3ce
grad e .
9) A minimum 6" la yt r of gr.wel backfill s hr,!l be placed over the Ill-Drains and di st r.i butioll pipe with an
additional layer or fi lter furic on !op below the fimti b::tdcfilllayr.r to li 3 ~.u rfac e .
10) Every efl'orl sl!all be mad e to minimize tl!e lamagc to surrounding Janci and vegetation on either ~i l:e of
111c !r em :1cs .
lJ)'f hc trenches mu~'t be seede d and mulched or covered with vegetc·'ive groum~ cover.
Our de s ign and recommendation s are based upon datcl suppbecl to u ~, by others . If subsurface or site
conditions are fou nd to be differe nt from th ose prcsen .cd in this re por t, we s hould be notified to evaluate
the effe ct it may have on the propose d OWS. If the Co unty Environmental Health Departm.ent req ues ts
c han ges or modifications to this design, ·ve should be co ntactcclto evaluate the e f fec t on th e OWS.
If 'Ou have any q t.~stion or need any add itional information, please ca ll.
Sincerely,
SOPRI S ENGINEERJNG, LLC
06/26/2007 13:20 970-704-0313
Andy Schwaller
Garfield County Building Department
108 8111 Street, Suite 40 I
Glenwood Springs, CO 81601
SOPRIS ENGINEERI NG
RE: As-Built On-site Wastewater. System (OWS), Crossland Residence,
Lot 24, High Aspen Ranch, Garfield County, CO
SE Job No. 24044.0 I
Dear Andy:
PAGE 04
June 25, 20071
RECEIVED
JUN 2 6 2007
'..J.A.Ri·IELD 0 JNTY
BUILDING & PLANNING
Pursuant to County Regulations , this letter provides documentation that the new Onsite Wastewater System (OWS)
recently installed is in general compliance with the permitted design . Sopris Engineering has perfonncd site visits
to measure, inspect, and document the as built conditions of the constructed system_ We have coordinated our
efforts with the system installer. The system was inspected prior to backfilling and after component. installations
were complete_ The as-built conditions and installation of the new OWS components is in compliance with the
permitted design specifications for the system. The System was installed in accordance with State and County
Regulations and the design specifications presented in the Sopris Engineering report and the design drawing layout
and details , dated August 30, 2004. The 2000-gallon dual compartment concrete septic tank was installed with an
effluent filter installed in the outlet tee and with risers with lids to the surface. The gravity line from the hou se to
the tank is installed at a 2% slope with a intermediate cleanout and 45 -degree step down segment of pipe to mitigate
the grades . This type of installation over the relatively short segment of pipe is appropriate to provide gravity
distribution into the tank without separation of liquids and solids.
The absorption field was constructed with 4 trenches containing 19 E lgen In-Drain units in each trench . A
distribution box was installed ne xt to the field to equally distribute effluent to the trenche s via individual 4~'
distribution lines connected at a tee on the center of each trench. Four-inch perforated di stribution pipes run along
the top center of the In -drain units in each trench _ The In-drain units are installed per manufacturers requirements.
The treatment units, sand layer and di stribution pipe is installed in a filter fabric envelope. Jnspe~tion ports were
installed on each end of the perforated distribution pipes. The individual trenches were excavated to a depth to
allow the placement of a deep grav el la yer to increase the side wall absorption area in the trench for the infiltration
of treated effluent. The trenches were installed level with the gravel laye r underlying the sand treatment layer
placed below the In-Drain units and backfill over and around the In-Drain units. The construction was completed
utilizing specified materials install e d according to design . The minimum setback distances have been maintained.
OWS Operation and Maintenance
All components of the eng1neered OWS shall be inspected on a regular bas is and be properly maintained.
The re estabHslunent of vegetative cover. over the field and responsibility for operation, inspection and
maintenance of the system will remain with the Lot Owner or the owners representative. The owner shall
periodically inspect the OWS and perform all maintenance and repairs as necessary to ensure that the
system is in good operating condition and perfonning as des igned.
The OWS should require minimal maintenance. Several factors influencing the need for maintenance
include: actual wastewater flows versus design flows ~ the volume ofkitchen/dm:n:estic waste (excluding
502 Main Street· Suite A3 ·Carbondale, CO 81623 • (970) 704-0311 • Fax
(970) 704-0313
SOPRIS ENGINEERING • llC civil consultants
05/25/2007 13:20 970-704-0313 SOPRIS ENGINEERING PAGE 05
Andy Schwaller
SE Job No. 24044.01
.June 25, 2007
Page 2
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 pro\)lems. ln general, for a properly utilized system, septic tanks should be pumped and inspected
every 2-4 yeats. The effluent filter should be cleaned every six months and at the time of pumping.
Absorption fields should be maintained 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 questions or need any additional information, please call.
Sincerely,
SOPR!S ENGINEERING, LLC