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4" RISER PIPE INSPECTION PORT INSTALLED
AT EACH END CHAMBER (TYP.)
`I
1 i
EXCAVATION DEPTH APPROX,
1.5'-2' BELOW EXISTING GRADE
CONCRETE DISTRIBUTION BOX WITH BAFFLE
INSTALLED LEVEL ON COMPACTED BASE
INSTALL RISERS AND UD TO SURFACE
i 1 i
ABSORPTION/TREATMENT FIELD
USE 54 QUiCK-4 CHAMBERS IN 3 TRENCHES WITH 18 CHAMBERS PER ROW FOR ATOTAL
ABSORPTION AREA OF 630 S.F. THE SYSTEM SHALL BE PLUMBED FOR EQUAL GRAVITY
DISTRIBUTION. THE CHAMBERS SHALL BE INSTALLED ON LEVEL GRADE IN EACH TRENCH. N
THE BOTTOM OF EACH TRENCH TO BE EXCAVATED TO A MAXIMUM DEPTH OF 16 INCHES
BELOW THE EXISTING SURFACE GRADES, WITHIN THE UPPER HORIZON OF THE NATIVE
CLAY LOAM SOILS & BACKFILLED WITH A MINIMUM 12 -INCHES OF COVER OVER THE\
CHAMBERS. THE FINISH GRADE ACROSS THE FIELD SHALL BE SLIGHTLY MOUNDED A
MINIMUM 9 -INCHES ABOVE EXISTING ADJACENT GRADES.
IF LARGE COBBLES OR BOULDERS ARE ENCOUNTERED IN ANY PORTION OF THE '
EXCAVATIONS, OVER EXCAVATE AS NEEDED AND BACKFILL WITH A MINIMUM 4 INCH \ \
DEPTH OF CONCRETE SAND.
OM II.
WI* 4•111111.
CHAMBER END CAPS INSTALLED ON
THE ENDS OF ALL CHAMBERS
" PVC D . RIBUTiON PIPES (1YP.)
INSTALL A 2 -COMPARTMENT 1000 -GALLON CONCRETE SEPTIC TANK
(USE VALLEY PRECAST ITEM-1000T-2CP-EF), INSTALL WITH (2) 24"
DIA. BY 12" DEEP CONCRETE RISERS WITH LIDS AT THE SURFACE.
INSTALL INLET SANITARY TEE AND OUTLET EFFLUENT FILTER
SANITARY TEE. DEPTH TO TOP OF TANK FROM EXISTING GRADE IS
APPROXIMATLEY 6 -INCHES. TOP RISER UD @ FINISH GRADE
APPROXIMATELY 6 -INCHES ABOVE EXISTING ADJACENT GRADE.
30
50'
DITCH
SETBACK
V\
I
INV IN: 6065.26
4"
SEW
i� CLAS
SLOPEt
C GRAVITY
LINE. BED W
AT 2%
6067
PROPOSED 4" L�
2 -WAY CLEANOUT t"
6A0
r
10' PROPERTY
LINE SETBACK
41110
100.0'
GRAPHIC SCALE
15 30 60
120
(IN FEET)
1inch = 30 ft.
WTS D17SJGIV PLAJ'V
50' PROPERTY
LINE SETBACK
120.0'
100'
RADIUS FROM EXISTIN
WELL
10' PROPERTY
LINE SETBACK
ULRYCH-Design Calculations OWTS
The design flow is calculated as follows for a 1700 S.F. three bed -bedroom residentce.
The onsite wastewater treatment system (OWTS) is designed for a 3 -bedroom residential
capacity.
From the Regulation 43 usage table :
Minimum population based on 3 bedrooms = 6 persons.
Gallons per day per person =75 gal/person/day, No peaking factor
Max. Design flow (Qd)gallons/day = (# of people) x (avg. flow)gal/person/day.
Design flow Qd = 6*75=450 gpd
Septic Tank Design:
Use a 1000 gallon, two compartment concrete septic tank with an effluent filter outlet sanitary
tee in the second chamber. Tank shall be installed with sealed concrete risers and lids to the
finish grade surface.
Sub Surface Conditions and Testing:
Subsurface soil investigations and USDA soil texture method tests were performed by Sopris
Engineering on August 21, 2015. The soils in the area of the proposed absorption field were
sampled and characterized by application of the USDA soil texture method analysis. The soils
were tested to determine the hydraulic loading rate and the appropriate absorptive surface
depth in the native soils. A shallow and deep excavated pit was observed in the west central
portion of the site. The soils below 6 to 12 inches of topsoil consist of medium dense silt loan
with moderate granular to fine grained massive structure overlying cobbles and gravel in a
sandy silty clay loam matrix to the 7 foot depth explored. These soils appear to consist of glacal
outwash materials consisting of sand, silt, clay, gravels, cobbles and small boulders. The soil
appears to be consistent across the site.
The native soils sampled from 1-3 feet below the surface are characterized as a soil type 2A
consisting of silt loam texture with moderate granular to fine grained massive structure. Thi1
soil has an effective loading rate for conventional soil treatment of 0.50 gal/S.F./day for a Ie4
1 conventional treatment system. The equivalent percolation rate is approximately 26-40
minutes per inch. Increased quantities of cobbles and gravel are encountered at depths belov 4
feet. No free water was encountered in excavations on site. Groundwater levels are expectecto
be well below 10 feet from the existing surface grades along down gradient western portion c
the site . The soils appear suitable for a conventional shallow absorption field consisting of
gravelless infiltration chamber units. .
Treatment -Soil Treatment Unit/ Absorption System Design:
The treatment/absorption field is designed based on utilizing the effective Long Term
Acceptance Rate (LTAR) for the native soils and the application of appropriate loading factor
for a soil treatment unit system utilizing gravity distribution to gravelless chamber trenches i.rl
use of water saving fixtures. The new treatment system and absorption field will consist of
gravity distribution of septic tank effluent via a distribution box to individual chamber trenche
with treatment across the native soil absorptive surface.
Long Term Acceptance Rate (LTAR)
Considering the application of the new state regulation 43:
Receiving Wastewater Treatment Level 1; loading rate for silt loam is (0.50 gal./S.F./day) for sl
type 2A.;
Loading factors; (Table 10-2, Gravity application trenches =1.0) and
(Table 10-3, gravelless chambers = 0.7)
A(sf) = Qd .: A = Area;
LTAR LTAR = 0.50 Gal/S.F./day for silt loam
Qd = flow (gal/day) = 450 gpd
L.F.1=1.0 Gravity Distribution
L.F.2=0.7 Chambers
A(sf) = 450 gpd x 1.0 x 0.7 = 630 S.F.
0.50 Gal/S.F./day
Number of quick -4 chambers:
630S.F = 50 chambers Use 54 chambers
12 S.F./Chamber
Use 54 Quick -4 chambers in three trenches 74' long by 3' wide with 18 chambers units per
trench plus two end caps as delineated on the plan. The septic tank effluent will be gravity
distributed to the head of each chamber row via individual distribution pipes from a distribon
box. Additional soil evaluation will be performed during construction to verify the soils in t
excavation.
4" SOLID PVC GRAVITY
DISTRIBUTION PIPES (TYP.)
TO ABSORPTION FEILD
CROWN FIELD TRENCH TO
DIVERT SURFACE WATER
REVEGATATION
TOPSOIL LAYER
BACKFILL WiTH SCREENED
ONSITE SOILS FREE OF ROCKS IN EXCESS
OF 3" DIAMETER OR USE 3/4" TO 1.5'
SCREENED ROCK
FILTER FABRIC
BACKFILL LAVER NATURAL ONSITE
SOILS FREE OF ROCKS
SCARIFY/TILL BOTTOM SURFACE TO A
DEPTH OF 3" AND RAKE LEVEL
DISTRIBUTION BOX LID
AT GROUND SURFACE
RISER SECTION
BAFFLE
4" DISTRIBUTION
GRAVITY LINE
FROM SEPTIC TANK
\\...INVERTIN
8" AGREGATE BASE COURSE
COMPACTED SUBGRADE
DISTRIBUTION BOX DETAIL
3' MIN
N.T.S.
AIitarr
IN
4" PVC INLET PORT
iN END CAP
NOTE: ALL CHAMBERS IN EACH TRENCH MUST BE INSTALLED ON LEVEL
GRADE. MAINTAIN 6' OF UNDISTURBED SOIL BETWEEN TRENCHES. THE
ELEVATION OF ADJACENT TRENCHES MAY VARY. MAXIMUM DEPTH OF
TRENCHES NOT TO EXCEED 30" BELOW PROPOSED SURFACE GRADES.
INLET AND END CAPS ARE TO BE INSTALLED ON EACH END CHAMBER ROW.
IF EXCESSIVE LARGE COBBLES OR BOULDERS ARE ENCOUNTERED IN ANY PART
OF THE EXCAVATION, OVER EXCVATE AND BACKFILL WITH SAND OR SUITABLE
SCREENED NATIVE SOiLS.
12"
12"-18"
6"
LEACHING
CHAMBER
SELECT S IL REPLACEMENT
AS NEEDED IF EXCESSIVE COBB
BOULDERS ARE ENCOUNTERED"
FILTER SAND LEVELLING COUR!
UNDISTURBED EARTH SiLT
LOAM SOIL.
CHAMBE$ TRENCH CROSS SECTION DETAIL
N.T.S.
CONNECT INDIVIDUAL 4" DISTRIBUTION PIPE
TO HEAD OF EACH CHAMBER TRENCH (TYPICAL EACH TRENCH).
INSTALL CONNECTION AS NEEDED FROM END OR SIDE INLET
PORT OF EACH INFILTRATOR CHAMBER END CAP.
CHAMBER END CAP
API=
'I.-7-1
a: "IFmpg( 4.11
CHAMBER END CAP CONNECTION DETAIL
N.T.S.
NATIVE, YARD OR LANDSCAPED SURFACE
6" MIN.
1 1
6" MIN.
}
1
4" MiN.
4\//
//
EXCAVATED MATERIAL COMPAC
TO 90% STANDARD PROCTO'
�--SUITABLE BACKFILL OR
1-**-- CLASS 6 ROAD BASE
COMPACTED SUBGRADE
TRENCH CROSS-SECTION FOR
SDR -35,26 OR SCHD-40 PIPES
N.T.S.
1 1 •
1 THE OWTS AS SHOWN ON THE PLAN AND THE DETAILS WERE DESIGNED BY SOPRIS
ENGINEERING.
2. THE PROPOSED LOT CONDITIONS AND SURVEY INFORMATION WAS PROVIDED BY
SOPRIS ENGINEERING, LLC.
3. Primary Owner Name and Address: ULRYCH, ANDRE J., 730 Latigo Loop, Carbondale,
CO, 81623
Section: 20 Township: 7 Range: 88 OF THE 6TH P.M.
TRACT OF LAND IN GOV LOT 1 GARFIELD COUNTY, COLORADO
3.34 ACRES
Parcel Number: 239320200110
Address 9183 State Highway 82, Carbondale, CO 81623
OWTS SYSTEM NOTES
1. ALL MATERIALS AND INSTALLATION SHALL CONFORM TO STATE AND COUNTY ONSITE
WASTEWATER TREATMENT SYSTEM (OWTS) REGULATIONS.
2. IT IS THE RESPONSIBILITY OF THE CONTRACTOR TO CONTACT ALL UTILITY COMPANIES FOR
FIELD LOCATIONS OF UTiUTIES PRIOR TO CONSTRUCTION AND EXCAVATION.
3. ALL SEWER LINES TO BE SDR -35 OR SCHEDULE 40 P.V.C. PIPE UNLESS NOTED OTHERWISE.
4. INSTALL A TWO-WAY CLEAN OUT ON THE SERVICE LINE FROM THE HOUSE AND AN
ADDITIONAL CLEANOUT WITHIN 100' SECTION OF EFFLUENT DISCHARGE PiPE .
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. BACKFILL WITH SUITABLE NATIVE SOIL FREE OF BOULDER AND ROCK IN EXCESS OF
3" DIAMETER.
6. A SANITARY BAFFLE TEE IS REQUIRED ON THE SEPTIC TANK INLET AND OUTLET. INSTALL THE
INLET AND OUTLET TEES PLUMB AND IN A POSITION TO ALLOW EASY INSPECTION AND
MAINTENANCE OF TANK FROM THE TANK RISERS.
7. INSTALL A 4" EFFLUENT FILTER ON THE 4" OUTLET TEE OF THE SEPTIC TANK. THE FILTER
SHOULD BE INSPECTED EVERY SIX MONTHS. THE EFFLUENT FILTER SHALL BE MAINTAINED
AND CLEANED WHEN THE TANK IS PERIODICALLY PUMPED OR AS NECESSARY. INSTALL A
SUITABLE EXTENSION ON THE FiLTER WITH A HANDLE TO BE WITHIN 6" BELOW THE ACCESS
LID.
8. THE CONTRACTOR SHALL ENSURE THAT THE SEWER LINES, SEPTIC TANK AND RiSERS ARE
WATERTIGHT. ALL PLUMBING FIXTURES AND OWTS 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. THE DIMENSIONS AND NOTES SHOWN ON THE PLAN INDICATE MINIMUM AREA, LENGTH,
WIDTHS AND SEPARATION DISTANCES FOR THE TRENCHES, BED OR MOUNDED ABSORPTION
FIELD.
10. THE ABSORPTION TRENCHES SHALL BE EXCAVATED TO LEVEL GRADE IN NATIVE EARTH. THE
TRENCH BOTTOM AND SIDEWALLS SHALL BE SCARIFIED AND/OR RACKED IF SMEARING
OCCURS. IF EXCESSIVE LARGE COBBLES OR BOULDERS ARE ENCOUNTERED IN ANY PART OF
THE EXCAVATION OVER 6" FROM THE PROPOSED TRENCH BOTTOM SURFACE, OVER
EXCAVATE AND BACKFILL WITH SAND.
11. THE LEACHING CHAMBERS SHALL BE INSTALLED LEVEL WITH A MINIMUM COVER OF 10
INCHES NOT TO EXCEED 24 INCHES.
12. LEACHING CHAMBERS WILL BE PLACED IN THE EXCAVATION OVER THE NATIVE SOIL OR
SELECT SOIL REPLACEMENT. END CAPS SHALL BE INSTALLED ON THE END CHAMBERS IN
EACH TRENCH.
13. VERTICAL INSPECTION PORTS SHALL BE INSTALLED FROM THE PRE MARKED HOLE ON THE
TOP OF EACH END CHAMBER . (TYP. BOTH ENDS OF EACH ROW) THE PORTS MAY HAVE
THREADED CAPS AT GRADE.
14. THE CHAMBERS WILL BE BACKFILLED WITH EXCAVATED MATERIAL VOiD OF ROCKS, THE
BACKFILL MATERIAL SHALL NOT EXCEED 21/2" DIAMETER AND SHALL BE PLACED TO AT
LEAST 6 INCHES ABOVE THE TOP OF THE CHAMBERS. THE TOP OF THE PLACED BACKFILL
SHALL BE COVERED WITH A LAYER OF FILTER FABRIC. A MINIMUM 4" DEPTH OF TOPSOIL IS
TO BE PLACED ABOVE THE BACKFILL TO THE SURFACE & RE VEGETATED.
15. 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.
17. THE ABSORPTION FIELD SURFACES MUST BE SLOPED OR SLIGHTLY MOUNDED TO DIVERT
SURFACE DRAINAGE AWAY FROM THE FIELD.
18. THE ENTIRE ABSORPTION FIELD SURFACE MUST BE RE VEGETATED.
19. THE ABSORPTION FIELD SHALL BE INSTALLED PER THE REQUIRED SETBACK DISTANCES: 10
feet from any property line.
25 feet from any potable water supply line.
20 feet from any occupied dwelling.
100 feet from any well, spring or cistern.
50 feet from any stream or water course.
DISTRIBUTION SYSTEM NOTES:
1. AN EFFLUENT FILTER SHALL BE INSTALLED IN THE DISCHARGE TEE IN THE SECONDARY
COMPARTMENT OF THE SEPTIC TANK. WE RECOMMEND THE INSTALLATION OF AN
ORENCO SYSTEMS 4" EFFLUENT FILTER FILTERED EFFLUENT WILL DISCHARGE TO A
CONCRETE DISTRIBUTION BOX WITH RISERS AND LiD AT THE SURFACE.
2. THE DISTRIBUTION SYSTEM WILL BE INSTALLED TO ALLOW FOR EFFLUENT TO BE
EQUALLY DISTRIBUTED TO THE ABSORPTION TRENCHES VIA INDIVIDUAL 4"
DISTRIBUTION LINES CONNECTED TO THE HEAD OF EACH CHAMBER TRENCH.
3. THE MiNIMUM SLOPE OF THE DISCHARGE LINE FROM THE TANK TO THE
DISTRIBUTION BOX SHALL SHALL BE INSTALLED AT A MINIMUM 2% SLOPE. THE
INDIVIDUAL DISTRIBUTION LINES THE THE HEAD OF THE TRENCHES SHALL BE
INSTALLED ATA MINIMUM OF 2% SLOPE.
TESTING, INSPECTIONS AND CONSTRUCTION MANAGEMENT:
1. ADDITIONAL GEOTECHNICAL EVALUATIONS AND INSPECTIONS BY THE ENGINEER SHOULD BE
PERFORMED DURING INITIAL STAGES OF CONSTRUCTION TO VERIFY SOIL CONDITIONS AND
OWTS DESIGN.
2. THE EVALUATIONS AND INSPECTIONS MAY RESULT IN MODIFICATIONS TO THE DESIGN THAT
MAY INCLUDE FIELD SIZE REVISIONS AND POSSIBLE SOIL REPLACEMENT iN SELECT AREAS iF
NEEDED. SUFFICIENT NOTICE TO THE ENGINEER BY THE PROJECT MANAGER/CONTRACTOR
NEEDS TO BE MADE IN ORDER TO SCHEDULE THE SITE INSPECTIONS.
3. PRIOR TO CONSTRUCTION OF THE PERMITTED SYSTEM THE ENGINEER SHOULD BE
CONTACTED BY TI -DE PROJECT MANAGER/CONTRACTOR 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.
4. 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. THE ENGINEER SHOULD BE CONTACTED AND NOTIFIED OF THE CONSTRUCTION
SCHEDULE.
5. OUR DESIGN AND RECOMMENDATIONS ARE BASED OUR SiTE ASSESSMENT, SOiL
EVALUATION AND UPON INFORMATION SUPPLIED TO US BY OTHERS. IF SUBSURFACE OR
SITE CONDITIONS ARE FOUND TO BE DIFFERENT FROM CONDITIONS ASSUMED OR
INDICATED, WE SHOULD BE NOTIFIED TO EVALUATE ANY EFFECT ON THE PROPOSED OWTS.
IF THE COUNTY REQUESTS CHANGES OR MODIFICATIONS TO THIS DESIGN, WE SHOULD BE
CONTACTED TO EVALUATE AND RESPOND TO THE REQUEST.
6. CONTRACTOR SHOULD REVIEW ANY CONDITIONS ON THE ISSUED PERMITAND COORDINATE
WITH THE ENGINEER REGARDING CONSTRUCTION OF THE SYSTEM.
7. IF YOU HAVE ANY QUESTION OR NEED ANY ADDITIONAL INFORMATION, PLEASE CALL PAUL
RUTLEDGE AT SOPRIS ENGINEERING, 704 0311.
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DESIGNED BY
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DATE: 03-10-2016
JOB NO. 15178
SHEET C3