HomeMy WebLinkAboutDesign Plan/
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Lot 17
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Sopra"s Lane
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4" RISER PIPE INSPECTION
AT EACH END
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I 4" PVC DISTRIBUTION PIPES (TY
ONCRETI DISTRIBUTION BOX W
INSTILLED LEVEL ON COMPA
INSTALL RISERS AND UD
7&
INSTALLED A 2-COMPA TMENT 50 -GALLON CON
TANK (USED VALLEY PREC ITEM-7j2SOT-2CP-EF), IN
24" DIA. BY 24" DEEP CO RETE RIStRS WITH LIDS A
INSTALLED INLET S ' NITARY TAE AND OUTLET E
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IT : • FELE
D BASE
SURFACE
70'
• " ETE SEPTIC
ALL WITH (2
THE SURFA
FLUENT FILTE'
ANITARY TE
/1
r
ABSORPTION/TREATMENT FIELD
INSTALLED 51 QUICK -4 CHAMBERS IN 3 TRENCHES WITH 17 CHAMBERS PER ROW FOR A
TOTAL ABSORPTION AREA OF 612 S.F. THE SYSTEM IS PLUMBED FOR EQUAL GRAVITY
DISTRIBUTION. THE CHAMBERS ARE INSTALLED ON LEVEL GRADE IN EACH TRENCH. THE
BOTTOM OF EACH TRENCH WAS EXCAVATED TO A MAXIMUM DEPTH OF 36 INCHES
BELOW THE EXISTING SURFACE GRADES, WITHIN THE NATIVE SILT LOAM SOILS &
BACKFILLED WITH A MINIMUM 12 -INCHES OF COVER OVER THE CHAMBERS. THE FINISH
GRADE ACROSS THE FIELD IS SUGHTLY MOUNDED.
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% / CHAMBER END CAPS INSTALLED ON
THE ENDS OF ALL CHAMBERS
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20' UTILITY EASEMENT
EXCAVATION DEPTH AP OX,
20
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2'-3' BELOW EXISTING RADE / / ' /
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COMMON SPACE ENTRY
FEATURE EASEMENT
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4.
Lot 16
143,376 Sq Ft
3.29 Ac.
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4" PVC/GRAV}� SEWER UNE.
/ BED W/ CLASS -6 AT 2% SLOPE±
INSTILLED 4"/
2-W Y CLEAt/NOUT
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GRAPHIC
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LE
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( IN FEET )
1 inch = 30 ft.
OWTS DESIGN PLAN
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CL IRRIGATION DITCH
20' EASEMENT
ABSORPTION/TREATMENT FIELD INSTALLATION NOTE:
1. THE BOTTOM OF EACH TRENCH WAS EXCAVATED TO A MAXIMUM DEPTH OF
36 -INCHES BELOW THE EXISTING SURFACE GRADES, WITHIN THE NATIVE SANDY SILT
LOAM SOILS. THE TRENCHES WRER EXCAVATED TO THE SPECIFIED DEPTH WITH THE
BOTTOM ABSORPTIVE SURFACE SCARIFIED BY A FINAL PASS OF THE EXCAVATOR
BUCKET TEETH.
2. THE CHAMBERS WERE INSTALLED ON LEVEL GRADE IN EACH TRENCH OVER THE
SCARIFIED ABSORPTIVE SURFACE . THE INSTALLED CHAMBERS & END CAPS WERE
COVERED WITH NON -WOVEN FILTER FABRIC & BACKFILLED WITH A MINIMUM
12 -INCHES OF COVER OVER THE TOP OF THE CHAMBERS.
3. THE FINISH GRADE ACROSS THE FIELD ARE SLIGHTLY MOUNDED ABOVE EXISTING
ADJACENT GRADES.
A 4" PVC RISER PIPE INSPECTION PORT WAS INSTALLED AT EACH CHAMBER END CAP.
4. THE ENGINEER INSPECTED THE EXCAVATION AT TIME OF CONSTRUCTION TO VERIFY
SOIL CONDITIONS & LAYOUT OF TRENCHES. ALL WORK WAS APPROVED BY THE
ENGINEER PRIOR TO BACKFILL OF TANK, PIPING AND CHAMBERS.
ANTHONY, Lot 16 -Design Calculations OWTS
The design flow is calculated as follows for a S.F. four bed -bedroom residence.
The onsite wastewater treatment system (OWTS) is designed for a 4 -bedroom residential
capacity.
From the Regulation 43 usage table :
Minimum population based on 4 bedrooms = 7 persons.
2 persons per bedroom for first 3 bedrooms & I person per bedroom for each additional bedroom
Gallons per day per person =75 gaVperson/day, No peaking factor
Max. Design flow (Qd)gallons/day = (# of people) x (avg. Row)gal/person/day.
Qavg = 3x2x75= 450 gal/day
Qavg = IxIx75- 75 gaUday
Design flow Qd = 7'75=525 gpd
Septic Tank Design:
Use a 1250 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 Solaris
Engineering on April 22, 2016. 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 North central
portion of the site. The soils below 6 to 12 inches of topsoil consist of medium dense silt loam
with granular structure to the 8 foot depth explored.
The native soils sampled from 1-3 feet below the surface are characterized as a soil type 2
consisting of silt loam texture with granular structure. This soil has an effective loading rate for
conventional soil treatment of 0.60 gal/S. F./day for a level 1 conventional treatment system.
The equivalent percolation rate is approximately 16-25 minutes per inch. No free water was
encountered in excavations on site. Groundwater levels are expected to be well below 10 feet
from the existing surface grades along down gradient North central portion of the site. The soils
appear suitable for a conventional shallow absorption field consisting of graveness 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 factors
for a soil treatment unit system utilizing gravity distribution to gravelless chamber trenches and
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 trenches
with treatment across the native soil absorptive surface.
Long Term Acceptance Rate (LIAR)
Considering the application of the new state regulation 43:
Receiving Wastewater Treatment Level 1; loading rate for silt loam is (0.60 gal./S.F./day) for soil
type 2.;
Loading factors; (Table 10-2, Gravity application trenches = 1.0) and
(Table 10-3, graveness chambers = 0.7)
A(sf) = Qd .: A =Area;
LTAR = 0.60 Gal/S.F./day for silt loam
Qd = flow (gaVday) = 525 gpd
L.F.1=1.0 Gravity Distribution
L.F.2=0.7 Chambers
A(sf)= 525 gpd x 1.0x 0.7 = 612 S.F.
0.60 Gal/S.F./day
Number of quick -4 chambers:
612 S.F = Si chambers Use 51 chambers
12 S.F./Chamber
Use 51 Quick -4 chambers in three trenches 70' long by 3' wide with 17 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 distribution
box. Additional soil evaluation will be performed during construction to verify the soils in the
excavation.
4" SOLID PVC GRAVITY
DISTRIBUTION PIPES (TYP.)
TO ABSORPTION FIELD
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
DISTRIBUTION BOX LID
AT GROUND SURFACE
RISER SECTION
BAFFLE
4" DISTRIBUTION
GRAVITY LINE
FROM SEPTIC TANK
INVERT IN
8" AGREGATE BASE COURSE
COMPACTED SUBGRADE
DISTRIBUTION BOX DETAIL
N.TS.
4" PVC INLET PORT
IN END CAP
BACKFILL LAYER NATURAL ONSITE
SOILS FREE OF ROCKS
SCARIFY/TILL BOTTOM SURFACE TO A
DEPTH OF 3" AND RAKE LEVEL
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 36" 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.
LEACHING
CHAMBER
SELECT S +IL REPLACEMENT
AS NEEDED IF LARGE COBBLES OR
BOULDERS ARE ENCOUNTERED.
UNDISTURBED EARTH SILT
LOAM SOIL
CHAMBER 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
CIDER END CAP CONNECTION DETAIL
N.T.S.
NATIVE, YARD OR LANDSCAPED SURFACE
6
4" MIN
EXCAVATED MATERIAL COMPACTED
TO 90% STANDARD PROCTOR
SUITABLE BACKFILL OR
4" f"~- CLASS 6 ROAD BASE
COMPACTED SUBGRADE
TRENCH CROSS-SECTION FOR
SDR -35. 26 OR SCHD-40 PIPES
N.T.S.
GENERAL NOTES:
1. THE OWES AS SHOWN ON THE PLAN AND THE DETAILS WERE DESIGNED BY SOPRIS
ENGINEERING.
2. THE PROPOSED LOT CONDITIONS AND SURVEY INFORMATION WAS PROVIDED BY
Tuttle Survey,
3. Primary Owner Name and Address: Anthony, Jason & Kristine., 42 Badger Road,
Carbondale, CO, 81623
4. Site Location: Section: 24 Township: 7 Range: 88 OF THE 6TH P.M.
Callicote Ranch Subdivision, Lot 16 Amended #754313 GARFIELD COUNTY,
COLORADO 3.34 ACRES
Parcel Number: 2393-242-06-016
Address 103 C.R. (Cyrstal Springs Road), 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 UTIUTY COMPANIES FOR
FIELD LOCATIONS OF UTILITIES 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
INLETAND 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 SIDE WALLS 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 2 1/2" 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 SANITARY 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 PIPE 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 AT A 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 THE 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. DESIGN AND INSTALLATION RECOMMENDATIONS ARE BASED ON 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
DESIGN. 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 PERMIT AND COORDINATE
WITH THE ENGINEER REGARDING CONSTRUCTION OF THE SYSTEM.
7. IF YOU HAVE ANY QUESTION OR NEED ANY ADDITIONAL INFORMATION, PLEASE CONTACT
PAUL RUTLEDGE AT SOPRIS ENGINEERING, 704 0311.
G:\2016\16090\16090-AB-OWTS-ANTHONY-7-25-16.DW G
DESIGNED BY
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2
ANTHONY RESIDENCE
GARFIELD COUNTY, COLORADO
ONSITE WASTEWATER TREATMENT SYSTEM PLAN
OWTS AS -BUILT RECORD DRAWING
DATE: 07-25-2016
JOB NO. 16090
SHEET Cl
1250 Gallon Top
1250T-2CP Two prr .
- 1366"
DESIGN NOTES
• Design per performance test per ASTM
C1227
• op surface area R'
• Pc O 28 days, concrete -- 6,000 PSI
Mia
In n
Slp
20" __ I 1 ` ^� I.
Access
.
/ -J�*' `�.(-
� �. 'I I', fl 1
/
�.�
60'
t!
• funk to be set an 5' min. sand
funk
bed or Pee gravel
• Tank to be bock filled uniformly on
au sides in lifts less than 24' and
mechanically compacted
THY(
•1 In
`
'-- -e-r- 1 - ." - - •- -'-• -�---'�•
'
• Excavated material may be used for
backfill, provided large stones are
removed Top
• Excavation should be dewatered and
tank filled with water prior to being
put in service for instollation wile yew
WOW table less than 2' below grade
• Meets C1644-06 for resilient
on ecta Butyl Rubber
• Wet aria Outlet identified above pipe p
• Delivered completewith internal piping 1
n•
• VC v
or concrete s avoilabl
• Secondary lobe " �t-�_�
safety s avo wilt •
PVC riser
• Option of pump or siphon installed I i
I
1I
-r
ALLOWABLE BUR`'
(Based on Water Table)
i'•
56'Il
I
'
'
419"
- 1 168"
I "'
WATER TABLE
ALLOWABLE
EAR1H FILL
l
Il'
('�
I
•
130"
3
Section
DRY
J
View
Digging Specs Invert Dmeesions Net Capacity Net Weight
1S Long x 7' Wide inlet Outlet Length Wdth Height Inlet Side Outlet Total Lid Tank Total
567 below Inlet 56' 5S 135" 60" 68" 843 gal 416 gal 1259 gal 3120 lbs 10880 lbs 1.4000 lbs
Water :faCsl.H 37
Wriat.or
N p g'y 396-37'77 s •day
WVALLEY
PRECAST, PrtAllicaw FAX: ' `JF IT4l"�J iyf
i T inc. s service btett www,vedieryorwwacnn
Erie fr. yr 011c1
1. THE BOTTOM OF EACH TRENCH WAS EXCAVATED TO A MAXIMUM DEPTH OF
36 -INCHES BELOW THE EXISTING SURFACE GRADES, WITHIN THE NATIVE SANDY SILT
LOAM SOILS. THE TRENCHES WRER EXCAVATED TO THE SPECIFIED DEPTH WITH THE
BOTTOM ABSORPTIVE SURFACE SCARIFIED BY A FINAL PASS OF THE EXCAVATOR
BUCKET TEETH.
2. THE CHAMBERS WERE INSTALLED ON LEVEL GRADE IN EACH TRENCH OVER THE
SCARIFIED ABSORPTIVE SURFACE . THE INSTALLED CHAMBERS & END CAPS WERE
COVERED WITH NON -WOVEN FILTER FABRIC & BACKFILLED WITH A MINIMUM
12 -INCHES OF COVER OVER THE TOP OF THE CHAMBERS.
3. THE FINISH GRADE ACROSS THE FIELD ARE SLIGHTLY MOUNDED ABOVE EXISTING
ADJACENT GRADES.
A 4" PVC RISER PIPE INSPECTION PORT WAS INSTALLED AT EACH CHAMBER END CAP.
4. THE ENGINEER INSPECTED THE EXCAVATION AT TIME OF CONSTRUCTION TO VERIFY
SOIL CONDITIONS & LAYOUT OF TRENCHES. ALL WORK WAS APPROVED BY THE
ENGINEER PRIOR TO BACKFILL OF TANK, PIPING AND CHAMBERS.
ANTHONY, Lot 16 -Design Calculations OWTS
The design flow is calculated as follows for a S.F. four bed -bedroom residence.
The onsite wastewater treatment system (OWTS) is designed for a 4 -bedroom residential
capacity.
From the Regulation 43 usage table :
Minimum population based on 4 bedrooms = 7 persons.
2 persons per bedroom for first 3 bedrooms & I person per bedroom for each additional bedroom
Gallons per day per person =75 gaVperson/day, No peaking factor
Max. Design flow (Qd)gallons/day = (# of people) x (avg. Row)gal/person/day.
Qavg = 3x2x75= 450 gal/day
Qavg = IxIx75- 75 gaUday
Design flow Qd = 7'75=525 gpd
Septic Tank Design:
Use a 1250 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 Solaris
Engineering on April 22, 2016. 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 North central
portion of the site. The soils below 6 to 12 inches of topsoil consist of medium dense silt loam
with granular structure to the 8 foot depth explored.
The native soils sampled from 1-3 feet below the surface are characterized as a soil type 2
consisting of silt loam texture with granular structure. This soil has an effective loading rate for
conventional soil treatment of 0.60 gal/S. F./day for a level 1 conventional treatment system.
The equivalent percolation rate is approximately 16-25 minutes per inch. No free water was
encountered in excavations on site. Groundwater levels are expected to be well below 10 feet
from the existing surface grades along down gradient North central portion of the site. The soils
appear suitable for a conventional shallow absorption field consisting of graveness 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 factors
for a soil treatment unit system utilizing gravity distribution to gravelless chamber trenches and
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 trenches
with treatment across the native soil absorptive surface.
Long Term Acceptance Rate (LIAR)
Considering the application of the new state regulation 43:
Receiving Wastewater Treatment Level 1; loading rate for silt loam is (0.60 gal./S.F./day) for soil
type 2.;
Loading factors; (Table 10-2, Gravity application trenches = 1.0) and
(Table 10-3, graveness chambers = 0.7)
A(sf) = Qd .: A =Area;
LTAR = 0.60 Gal/S.F./day for silt loam
Qd = flow (gaVday) = 525 gpd
L.F.1=1.0 Gravity Distribution
L.F.2=0.7 Chambers
A(sf)= 525 gpd x 1.0x 0.7 = 612 S.F.
0.60 Gal/S.F./day
Number of quick -4 chambers:
612 S.F = Si chambers Use 51 chambers
12 S.F./Chamber
Use 51 Quick -4 chambers in three trenches 70' long by 3' wide with 17 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 distribution
box. Additional soil evaluation will be performed during construction to verify the soils in the
excavation.
4" SOLID PVC GRAVITY
DISTRIBUTION PIPES (TYP.)
TO ABSORPTION FIELD
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
DISTRIBUTION BOX LID
AT GROUND SURFACE
RISER SECTION
BAFFLE
4" DISTRIBUTION
GRAVITY LINE
FROM SEPTIC TANK
INVERT IN
8" AGREGATE BASE COURSE
COMPACTED SUBGRADE
DISTRIBUTION BOX DETAIL
N.TS.
4" PVC INLET PORT
IN END CAP
BACKFILL LAYER NATURAL ONSITE
SOILS FREE OF ROCKS
SCARIFY/TILL BOTTOM SURFACE TO A
DEPTH OF 3" AND RAKE LEVEL
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 36" 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.
LEACHING
CHAMBER
SELECT S +IL REPLACEMENT
AS NEEDED IF LARGE COBBLES OR
BOULDERS ARE ENCOUNTERED.
UNDISTURBED EARTH SILT
LOAM SOIL
CHAMBER 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
CIDER END CAP CONNECTION DETAIL
N.T.S.
NATIVE, YARD OR LANDSCAPED SURFACE
6
4" MIN
EXCAVATED MATERIAL COMPACTED
TO 90% STANDARD PROCTOR
SUITABLE BACKFILL OR
4" f"~- CLASS 6 ROAD BASE
COMPACTED SUBGRADE
TRENCH CROSS-SECTION FOR
SDR -35. 26 OR SCHD-40 PIPES
N.T.S.
GENERAL NOTES:
1. THE OWES AS SHOWN ON THE PLAN AND THE DETAILS WERE DESIGNED BY SOPRIS
ENGINEERING.
2. THE PROPOSED LOT CONDITIONS AND SURVEY INFORMATION WAS PROVIDED BY
Tuttle Survey,
3. Primary Owner Name and Address: Anthony, Jason & Kristine., 42 Badger Road,
Carbondale, CO, 81623
4. Site Location: Section: 24 Township: 7 Range: 88 OF THE 6TH P.M.
Callicote Ranch Subdivision, Lot 16 Amended #754313 GARFIELD COUNTY,
COLORADO 3.34 ACRES
Parcel Number: 2393-242-06-016
Address 103 C.R. (Cyrstal Springs Road), 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 UTIUTY COMPANIES FOR
FIELD LOCATIONS OF UTILITIES 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
INLETAND 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 SIDE WALLS 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 2 1/2" 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 SANITARY 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 PIPE 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 AT A 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 THE 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. DESIGN AND INSTALLATION RECOMMENDATIONS ARE BASED ON 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
DESIGN. 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 PERMIT AND COORDINATE
WITH THE ENGINEER REGARDING CONSTRUCTION OF THE SYSTEM.
7. IF YOU HAVE ANY QUESTION OR NEED ANY ADDITIONAL INFORMATION, PLEASE CONTACT
PAUL RUTLEDGE AT SOPRIS ENGINEERING, 704 0311.
G:\2016\16090\16090-AB-OWTS-ANTHONY-7-25-16.DW G
DESIGNED BY
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ANTHONY RESIDENCE
GARFIELD COUNTY, COLORADO
ONSITE WASTEWATER TREATMENT SYSTEM PLAN
OWTS AS -BUILT RECORD DRAWING
DATE: 07-25-2016
JOB NO. 16090
SHEET Cl