HomeMy WebLinkAboutEngineer's OWTS Design PlanINFILTRATOR SYSTEMS INC.
INFILTRATOR SYSTEMS INC.
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INFILTRATOR SYSTEMS INC.
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ORIGINAL GRADE DIFFERENT ELEVATION OVERFLOW
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INFILTRATOR SYSTEMS, INC:
PLACEMENT OF FILL MATERIAL WITHIN ZONE OF DISPOSAL
CONFINING LAYER
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TYPICAL TRENCH DETAIL
SHEET NOTES:
1) REFER TO MANUFACTURER FOR ADDITIONAL INSTALLATION REQUIREMENTS @
WWWANFILTRATO R.COM FOR QUICK 4 SERIES PRODUCTS.
2)REFER TO VALLEY PRECAST FOR ADDITIONAL TAN K, PUMPING AND CONTROL SYSTEM
REQUIREMENTS @ WWW.VALLEYPRECAST.COM OR (719) 395-6764.
3)ALL SEPTIC ELECTRICAL TO BE BY VALLEY PRECAST OR OWNER'S MASTER ELECTRICIAN
EXPERIENCED IN SEPTIC PUMPING SYSTEMS AND NEC REGULATIONS.
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1" PURE CORE
WATERSERVICE
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SEPTIC PLAN
BROCIC CIVIL, LLC
Professional Services
P.O. BOX 23
Eagle, CO 81631
Cell 970-471-2121
JUNE 16, 2025
7W Christian Ranch, LLC.
3412 CR 151,
Garfield County, CO
PN: 186328100118
DESIGN CALCULATIONS FOR DOMESTIC LOADS
REFERENCES
Eagle County Public Health Agency On -Site Wastewater Treatment System Regulations adopted
July 10, 2018 ("Regulations").
Colo. Dept. of Public Health and Environment Regulation #43 5 CCR 100243.
DESIGN FLOWS
Number of bedrooms = 3
Number of persons per bedroom = 2 (design flow)
Single Family Residential Design Flows = 75 gallons/day/person
Q design = 3 bdrms x 2 persons/hdrm x 75 gallons/person/day = 450 gpd
PER 43.6 TABLE 6-1, USE 450 GPD C i JCW ID &-S D 1 S 0 0-C.4 ,
SOILS PROFILE (Visual and tactile investigation):
Soil Type 2 ( See USDA) - From profile hole 1 - sample at 4 ft. Ribbon 17 man
Profile Holes (2) Textural Classification
0.0 to 1.0 ft Topsoil with heavy organics
1.0 to 8.0 ft Silty loam and sand, single grain structureless, granular (USDA)
No groundwater. No wetting of soils or mottling in profile holes
PERCOLATION TESTS: Visual and tactile evaluation of the treatment soil indicates silty
loam, sandy with a percolation rate of 15 IMlinutesnrich, with no limiting layer.
INFILTRATOR CHAMBER SYSTEM IN SERIAL TRENCH DISTRIBUTION
Given this information, the residence would be best served by a chamber system in serial trench
distribution.
Treatment Level 1 Effluent: Per Tables 6-2: 10-1.
Surface of Soil Treatment Area (STA) shall be based on LTAR and not the percolation rate.
Soil Treatment Area = Design Flow (gals/day)/LTAR gal/day/SF.
Long Term Acceptance Rate is estimated to be 0.7 GaVday
• Reductions: (per 43.10,D. Tables 10-2 & 10-3)
Trench serial chambers: 0.7
• Design Flow = 450 GPD / (0.7 Gal/day/SF) X 0.7 = 450 GPD
• Using standard Quick 4 Infiltrators: 450 GPD / 12 SF per infiltrator = 38 infiltrators
• Trenches shall be (2) runs of (19) infiltrators; Total (38)
• Valley Precast 1000 gallon tank
• Chamber Product to be Infiltrator Systems, Inc. "Quick 4" Low Profile Chambers.
SEPTIC TANK: Per table 9-1, for a maximum 3 bedroom residential structure, Minimum Tank
Capacity is tMallons in the first 2 chambers. Pr osed Valley Precast Tank IND gal 2
compartment: Inlet side Wn gallons and Outlet,$07 gallons. Water tightness per Section 9,
ASTM C 1227-12. 667 323
INSTALLATION
Install all components to the required setbacks required by regulations. No over excavation
allowed for septic tank or trenches.
DESIGN NOTES
• Design per performance test per ASTM
C1227
• Top surface area 62.33 ft'
• f c @ 28 days; concrete = 6,000 PSI
Min.
Installation:
• Tank to be set on 5" min. sand bed or
pea gravel
• Tank to be backfilled uniformly on all
sides in lifts less than 24" and
mechanically compacted
• Excavated material may be used for
backfill, provided large stones are
removed
• Excavation should be dewatered and
tank filled with water prior to being put
in service for installation with w }-•
table less than 2' below grade
• Meets C1644-06 for resilient col
• Inlet and Outlet identified above
• Delivered complete with internal
• PVC or concrete risers available
• Secondary safety screen available
PVC riser
• Option of pump or siphon install
ALLOWABLE BURY
(Based an Water Table)
WATER TABLE
ALLOWABLE
EARTH FILL
0' - 0"
3' - 0"
1'-oil
3'-0"
2' - 0"
4' - 0"
S-0"
4'-0"
DRY
4' - 0"
CHAMBER TRENCH CONSTRUCTION: Dig trench to geotechnical average depth to top
of silty, sandy loam (max 4 ft); Engineer to inspect. Install chambers level in (2) runs of 19
chambers. Backfill the chambers and all voids to top of chambers. Import may be required for
proper backfill.
TOP SOIL CONSTRUCTION: Back fill over chambers with 12 inches of high organic top
soil and reseed to native vegetation. Do not compact top soil! Mound topsoil for positive runoff,
1 ft. -18 inches.
SEPTIC TANK & PIPE CONSTRUCTION: Install septic tank level with 5" sand gravel
bedding. Install the delivery pipe from the residence to the septic tank minimum 2% slope,
Schedule 40 PVC (preferred) (ASTM D 2665) or SDR 35. Septic tank to have risers brought to
final grade and shall have a secure locking mechanism. Glued fittings for both pipe types due to
tree roots.
ALARM: A visual and audible alarm shall be incorporated into the controls and electrical
connections. Alarm to be in an open area or area easily visible.
NOTES:
I. The building sewer line from the house to the septic tank shall have a slope of inch per
foot (2D/e). Bends in the building sewer shall be limited to 45 degrees.
2. Use topsoil for vegetative cover.
3. Assemble and install the Infiltrator Chambers in the trenches according to the
manufacturer's recommendations.
4. Vehicle traffic, animal concentrated loads and irrigation over the system is prohibited.
Fencing advised.
5. The Septic System Installation shall be inspected by the Design Engineer prior to backfill.
Installer to call ECEH.
6. All installations shall meet the Arles and regulations of the Eagle County Environmental
Health Department.
7. Electrical requirements of alarm to be determined by Electrical Contractor prior to
construction.
8. The Bin effluent screen shall be installed in the outlet tee of the second chamber with both
tees visible from the access portals. Screen shall be maintained annually or as needed.
9. Pump septic tank every 2-3 years minimum to prevent deterioration of concrete.
10. Installer must be licensed installer in Eagle County; see permit.
MINIMUM DIMENSIONS TO FACILITIES
ACTUAL (MIN.
REQ'D)
SEPTIC TANK TO BUILDING 60 FT (5 FT)
SEPTIC TANK TO WATERLINE 20 FT (10 FT)
SEPTIC TANK TO TRENCH 10 FT (10 FT)
SEPTIC TANK TO SPRING/WELL NA (50 FT)
ABSORPTION TRENCH TO SPRING/WELL NA (100 FT)
ABSORPTION TRENCH TO BUILDING 25 FT (20 FT)
ABSORPTION TRENCH TO WATERLINE 25 FT (25 FT)
ABSORPTION TRENCH TO IRRIGATION NA FT (50 FT)
ABSORPTION TRENCH TO PROPERTY LINE 90 FT (10 FT)
BUILDING SEWER TO WATER LINE 10 FT (10 FT)
See 43.7, Table 7-1 for further information and requirements if changes are made to assure
proper clearances.
SANDY LOAM
60% SAND
30% SILT
10% CLAY
Top
View
08« Section
View
Digging Specs
Invert
Dimensions
Net Capacity
Net Weight
13' Long x 8' Wide
Inlet
Outlet
Length
Width
Height
Inlet Side
Outlet
Total
Lid
Tank
Total
56" below inlet
56"
53"
132"
68"
68"
1 gal
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3600 Ibs
11180 Ibs
14780 IDS
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