HomeMy WebLinkAboutEngineer's Design PlanW
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INSPECTION PORT AT
EACH END OF EACH
LATERAL, TYP.
EXISTING 1250 GALLON SEPTIC
TANK. INSTALL AN EFFLUENT FILTER
IN THE VERTICAL OUTLET TEE.
INSTALL 4"Ø SCH.40 PVC
SEWER LINE @ 2% MIN., TYP.
EXISTING
CLEANOUT
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EXISTING PIPED
IRRIGATION DITCH
EXISTING LEACH
FIELD TO BE
RETIRED IN PLACE
EXISTING 4 BEDROOM
RESIDENCE
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CONSTRUCT HEADGATE
OVERFLOW DITCH
AROUND THE OWTS
EXISTING GATE
20'
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NEW DISTRIBUTION BOX
ANTONELLI LANE
37110DERIC J O N WA
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COL O R A D O LICE
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SSIONA L E N G INEER
11/1/23
NORTH
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923 Cooper Avenue
Suite 201
Glenwood Springs, CO 81601
tele: 970.945.5252
fax: 970.384.2833
Engineer or Surveyor Seal
Sheet
Client Information:
PROJECT NO.
FILE NAME:
Designer:
Drafter:
Date:
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9.8.7.6.5.4.3.2.
11/1/23
APL
DJW
23036-v-topo.dwg
23036
970.319.7693
Silt, CO 81652
PO Box 1085
Mindy Kennedy
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C.1
00 30'60'
Scale: 1" = 30'
SITE EVALUATION
1.SITE AND SOIL EVALUATIONS WERE PERFORMED BY:
DERIC J. WALTER, PE KEVIN DYE, PE
BOUNDARIES UNLIMITED INC.FREE RANGE ENGINEERING
923 COOPER AVE., STE. 201 817 CEDAR DRIVE
GLENWOOD SPRINGS, CO 81601 RIFLE, COLORADO 81650
970.945.5252 970.318.6784
2.EVALUATION DATE(S): OCTOBER 2023.
3.SETBACK REQUIREMENTS FOR A TREATMENT LEVEL 1 STA TRENCH/BED, UNLINED
SAND FILTER OR SEEPAGE PIT (PER TABLE 7-1) AND AN ADWF=600 GPD:
3.A.SPRING, WELL OR POTABLE CISTERN=100'
3.B.POTABLE WATER SUPPLY LINE=25'
3.C.STRUCTURE W/ BASEMENT/CRAWL SPACE=20'
3.D.STRUCTURE W/O BASEMENT/CRAWL SPACE=10'
3.E.PROPERTY LINE, PIPE OR LINED IRRIGATION DITCH=10'
3.F.INTERMITTENT IRRIGATION LATERAL, INFILTRATION STRUCTURE=25'
3.G.LAKE, WATER COURSE, IRRIGATION DITCH, STREAM OR WETLAND=50'
3.H.DRY GULCH, CUT BANK OR FILL AREA=25'
3.I.SEPTIC TANK=5'
3.J.RESTRICTIVE LAYER OR GROUNDWATER (VERTICAL): 4' (TREATMENT LEVEL 1,
GRAVITY FEED)
3.SETBACK REQUIREMENTS FOR THE SEPTIC TANK SHALL BE (PER TABLE 7-1):
3.A.SPRING, WELL OR POTABLE CISTERN=50'
3.B.POTABLE WATER SUPPLY LINE=10'
3.C.STRUCTURE W/ BASEMENT/CRAWL SPACE=5'
3.D.STRUCTURE W/O BASEMENT/CRAWL SPACE=5'
3.E.PROPERTY LINE, PIPE OR LINED IRRIGATION DITCH=10'
3.F.INTERMITTENT IRRIGATION LATERAL, INFILTRATION STRUCTURE=10'
3.G.LAKE WATER COURSE, IRRIGATION DITCH, STREAM OR WETLAND=50'
3.H.DRY GULCH, CUT BANK OR FILL AREA=10'
3.I.STA TRENCH/BED, UNLINED SAND FILTER OR SEEPAGE PIT=5'
SURFACE
5'
Scale: N.T.S.
Site & Soils Evaluation
SOIL EVALUATION
1.SOIL WAS CLASSIFIED BY THE GEOTECHNICAL ENGINEER
(FREE RANGE ENGINEERING (PROJECT #23-02, OCTOBER
30, 2023) AS USDA SILT LOAM, TYPE 2A AND AN LTAR OF
0.50 GPD/SF.
3.
5
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SYSTEM DESIGN & CONSTRUCTION NOTES:
1.ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH CDPHE REGULATION 43 ONSITE WASTEWATER TREATMENT SYSTEM (OWTS) REGULATION, MOST CURRENT
EDITION AND LOCAL AGENCY REQUIREMENTS WHICH MAY OR MAY NOT SPECIFICALLY BE NOTED ON THE DRAWINGS. THE CONTRACTOR SHALL BE RESPONSIBLE FOR
KNOWING AND CONFORMING TO SUCH SPECIFIC DETAILS AS ARE REFERRED TO IN THE ABOVE MENTIONED REGULATIONS. THIS DRAWING DOES NOT CONSTITUTE AN
OWTS PERMIT. A PERMIT MUST BE OBTAINED FROM APPROPRIATE LOCAL AGENCY. THE CONTRACTOR MUST CONTACT THE LOCAL AGENCY HEALTH DEPARTMENT AND
THE PROJECT ENGINEER FOR INSPECTIONS OF THE CONSTRUCTED SYSTEM BEFORE BACKFILL. A REQUEST FOR INSPECTION BY THE PROJECT ENGINEER MUST BE MADE
AT LEAST 48-HOURS PRIOR TO THE EXPECTED TIME OF BACKFILLING.
2.DEMAND CALCULATIONS (SEC.43.6.A.2.h)
2.A.FOUR (4) BEDROOM RESIDENCE USING TREATMENT LEVEL 1 (TL1).
2.B.AVERAGE DAILY WASTEWATER FLOW (ADWF) AND ORGANIC LOAD RATE (BOD5):
2.B.1.SINGLE FAMILY DWELLING: 75 gpdc & 0.20 BOD5 lbs/day
2.B.2.ADWF = 75 gpd * (3 BEDROOMS * 2 PERSONS/BEDROOM + 1 BEDROOM * 1 PERSONS/BEDROOM) =525 gpd
2.B.3.BOD5 = 0.20 lbs/day * (3 BEDROOMS * 2 PERSONS/BEDROOM + 1 BEDROOM * 1 PERSONS/BEDROOM) = 1.40 lbs/day
BOD5 mg/L = BOD5*1,000,000 = 1.40 lbs/day*1,000,000 = 319.74 mg/L
ADWF*8.34 525 gpd*8.34
2.B.4.CBOD5 = BOD5 * 0.85 = 272 mg/L
3.SEPTIC TANK (SEC.43.9.B.2.a):
3.A.1,250-GALLON STANDARD STORAGE TWO-COMPARTMENT TANK (PER TABLE 9-1) WITH AN EFFLUENT FILTER.
3.B.THE TANK IS NOT SUBJECT TO BUOYANCY.
4.ABSORPTION AREA CALCULATIONS:
4.A.THE ABSORPTION AREA SLOPES MODERATELY
4.B.LONG TERM ACCEPTANCE RATE (LTAR) FOR TREATMENT LEVEL 1 (TL1) OF 0.50 gpd/SF (SEE SITE & SOILS EVALUATION NOTES/DETAIL).
4.C.MINIMUM SOIL TREATMENT AREA, A:
A = ADWF = 525 = 1,050 S.F.
LTAR 0.50 gpd/S.F.
4.D.SIZE ADJUSTMENT FACTORS: GRAVITY TRENCH = 1.0; CHAMBER TRENCH = 0.70 (TABLE 10-1A).
4.D.1.A,adj = 1050 SF * 1.0 * 0.7 = 735 SF
4.E.GRAVELLESS CHAMBER TRENCH SYSTEM:
4.E.1.INFILTRATOR QUICK4: 735 SF / 12 SF/UNIT = 62 UNITS IN A TRENCH CONFIGURATION (USE 64).
4.E.2.ADS ARC 36: 735 SF / 15 SF/UNIT = 49 UNITS IN A TRENCH CONFIGURATION (USE 52).
5.THIS SYSTEM IS SIZED FOR TYPICAL DOMESTIC WASTES ONLY. BACKWASH OR FLUSHING FLOWS FOR REVERSE OSMOSIS UNITS OR WATER SOFTENERS AND/OR FILTERS
SHOULD NOT BE INTRODUCED INTO THIS SYSTEM.
6.CLEAN OUTS ARE REQUIRED AT THE HOUSE AND AT ALL BENDS AND AT LEAST EVERY 100-FEET BETWEEN THE HOUSE AND THE SEPTIC TANK.
7.THE CONTRACTOR SHALL BE RESPONSIBLE FOR INSTALLING ALL WATER TIGHT COMPONENTS THROUGHOUT THE SYSTEM TO PREVENT INFILTRATION.
8.INSTALL RISERS AS NECESSARY TO BRING ALL ACCESS PORTS TO FINAL GRADE. PORTS SHALL BE MARKED IF CAPS ARE TO BE BURIED.
9.INSTALL 3-INCHES OF BLUEBOARD INSULATION, 3-FEET WIDE, OVER SEWER AND EFFLUENT PIPE WHEREVER DEPTH IS LESS THAN 5-FEET. UNDER NO CIRCUMSTANCES
SHALL COVER BE LESS THAN 2-FEET.
10.SITE PLAN INFORMATION FROM OTHERS. LOCATIONS OF ALL COMPONENTS MAY BE VARIED AS NECESSARY AS LONG AS ALL MINIMUM DISTANCES AND SLOPES MEET
THOSE REQUIRED.
84 Lariat Road
Lot 33A - Antlers Orchard
County of Garfield,
State of Colorado
Parcel No: 2179-043-00-594
NO
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To New Castle
I-70
SiltSITE
Vicinity Map
8.
5
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MAINTENANCE NOTES
1.TO ENCOURAGE THE HEALTH AND LONGEVITY OF THE OWTS SYSTEM, THE OWNER SHALL CONSIDER THE FOLLOWING:
1.A.MINIMIZE THE AMOUNT OF WATER THAT GOES DOWN THE DRAIN, THE BETTER YOUR SYSTEM WILL WORK.
1.B.MINIMIZE SOLIDS GOING DOWN THE DRAIN.
1.C.ELIMINATE GARBAGE DISPOSALS OR KEEP THE USE OF GARBAGE DISPOSALS TO A MINIMUM.
1.D.MINIMIZE GREASE AND OILS THAT GO DOWN THE DRAIN.
1.E.USE LINT FILTERS ON LAUNDRY MACHINE DRAINS.
1.F.KEEP SAND AND DIRT OUT OF THE BUILDING DRAIN.
1.G.AVOID FLUSHING SANITARY NAPKINS OR PAPER PRODUCTS OTHER THAN TOILET PAPER.
1.H.DO NOT USE LYE-BASED DRAIN UNCLOGGER CHEMICALS SUCH AS DRAINO, OVEN-OFF, OR OTHER STRONG
CLEANING AGENTS.
1.I.DO NOT PUT ANY “ROOT DETERRENTS” DOWN THE DRAIN.
1.J.DO NOT POUR PAINT THINNER, PESTICIDES, PAINTS OR PHOTO LAB CHEMICALS DOWN THE DRAIN
1.K.MINIMIZE USE OF CHLORINE BLEACH AND TOILET ADDITIVES.
2.THE OWNER SHALL CONTRACT WITH A SEPTIC TANK INSPECTOR TO INSPECT THE TANK ANNUALLY FOR GREASE AND
SEDIMENT ACCUMULATION. THE INSPECTOR SHALL REMOVED AND PROPERLY DISPOSED OF ACCUMULATED GREASE
AND SEDIMENT AS NEEDED TO ENSURE PROPER FUNCTION OF THE SYSTEM.
GENERAL ABSORPTION AREA NOTES
1.INSTALL CHAMBER UNITS IN ACCORDANCE WITH
MANUFACTURER'S RECOMMENDATIONS.
2.ABSORPTION TRENCHES SHALL BE 3' WIDE OR LESS
AND PARALLEL THE GROUND SURFACE CONTOURS.
PARALLELING TRENCHES SHALL BE SEPARATED BY
A DISTANCE OF 6' MIN.
3.THE BOTTOM OF THE ABSORPTION TRENCHES
SHALL BE LEVEL AND THE BOTTOM AND
SIDEWALLS MUST BE RAKED TO REMOVE ANY SOIL
SMEARS INCURRED DURING THE EXCAVATION.
FAILURE TO DO SO MAY REQUIRE THE CONTRACTOR
TO REPLACE THE ABSORPTION FIELD AT HIS/HER
OWN EXPENSE.
4.DRAINAGE SWALES ARE TO BE PROVIDED ABOVE
AND AROUND THE FIELD, AS NECESSARY, TO
PREVENT SURFACE RUNOFF FROM ENTERING
ABSORPTION AREA.
5.NO EXCAVATION OF THE ABSORPTION FIELD IS TO
BE DONE DURING WET WEATHER AND USE OF
RUBBER TIRE VEHICLES OVER THE ABSORPTION
AREA IS STRICTLY PROHIBITED.
6.UNSUITABLE MATERIAL EXISTING WITHIN THE FIELD
SHALL BE EXCAVATED AND BACKFILL SHALL
CONSIST OF IMPORTED LOAMY SAND OR SANDY
GRAVEL. THE ENGINEER SHALL BE CONTACTED IF
BEDROCK OR GROUNDWATER IS ENCOUNTERED IN
THE OVER-EXCAVATION.
7.TOPSOIL COVER MAY BE VARIED (1-FOOT MINIMUM,
2-FOOT MAXIMUM) TO ALLOW FOR LANDSCAPING.
36" MAX.
UNDISTURBED NATIVE SOILS
6' (MIN.)
BOTTOM TO BE LEVEL AND FLAT OVER
ENTIRE AREA TO WITHIN 0.05'±. (TYP.)
REMOVE ANY ENCOUNTERED
BOULDERS AND BACKFILL WITH LOAMY
SAND OR SANDY GRAVELS. DO NOT
USE COMPACTED MATERIALS.
DO NOT WALK ON OR COMPACT
BOTTOM OF TRENCH.
FINISHED GROUND - MAINTAIN POSITIVE
SLOPE AWAY FROM TOP SURFACE OF
THE CHAMBER TRENCHES.
PVC COUPLING FOR SUPPORT
STANDARD INSPECTION PORT, TYP. (4"Ø PVC
SOLID PIPE CUT TO FIT. LOCATE PER PLAN
VIEW. ATTACH REMOVABLE CAP OR THREADED
CLEANOUT ASSEMBLY.
INFLOW AND OVERFLOW
PIPES SHALL ENTER THE
UPPER KNOCKOUTS
GRAVELLESS CHAMBER SYSTEM:
INFILTRATOR QUICK 4, ADVANCED
DRAINAGE SYSTEMS BIODIFFUSER
(STANDARD), OR ENGINEER
APPROVED EQUAL.
EX. GRA
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FILL
CIRCULAR IRRIGATION-STYLE VALVE
BOX & COVER - LID COLOR PURPLE OR
GREEN - LABEL "SEWER"
3:1
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1' MIN
2' MAX
1% MIN
FILL
To Rifle
(2A) SILT, SAND, CLAY,
LIGHT BROWN, DRY TO
MOIST, NON-PLASTIC
(2A) SAME AS ABOVE BUT
MORE CLAY, MOIST, LOW TO
MEDIUM PLASTICIITY