HomeMy WebLinkAboutOWTS DesignAPPROXIMATE LOCATION OF EXISTINGLEACH FIELD FOR RESIDENCEC/O4"Ø SCH.40 PVC@ 2% MIN.CLEANOUT ATTHE BUILDINGEXISTING TREE, TYP.EXISTING POND15 ADS BIODIFFUSER UNITS(LEVEL TRENCH)ExistingResidenceProposedADU+ShopX X X
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CDPHE APPROVED 500-GALLON MIN TWO (2)CHAMBER SEPTIC TANK W/ EFFLUENT FILTER(SEE DETAIL)5'
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E APPROXIMATE PROPERTY LINEAPPROXIMATE LOCATIONOF 8' DEEP TEST PITAVOID TEST HOLES DURINGTRENCH PLACEMENT15%15%EXISTINGRESIDENCEPROPOSEDADU + SHOPPROPOSED SEPTIC TANK& LEACH FIELDAPPROXIMATE PROPERTY LINEA
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E APPROXIMATE PROPERTY LINESYSTEM NOTES1.ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH CDPHE REGULATION #43 ONSITE WASTEWATER TREATMENT SYSTEM REGULATION(OWTS), MOST CURRENT EDITION AND LOCAL AGENCY REQUIREMENTS WHICH MAY OR MAY NOT SPECIFICALLY BE NOTED ON THEDRAWINGS. THE CONTRACTOR SHALL BE RESPONSIBLE FOR KNOWING AND CONFORMING TO SUCH SPECIFIC DETAILS AS ARE REFERRED TOIN THE ABOVE MENTIONED REGULATIONS. THIS DRAWING DOES NOT CONSTITUTE AN OWTS PERMIT. A PERMIT MUST BE OBTAINED FROMTHE APPROPRIATE LOCAL AGENCY. THE ENGINEER MUST OBSERVE THE CONSTRUCTED SYSTEM BEFORE BACKFILL AND PROVIDE A LETTEROF INSPECTION AS REQUIRED BY THE LOCAL AGENCY. A REQUEST FOR INSPECTION MUST BE MADE BY THE CONTRACTOR AT LEAST48-HOURS PRIOR TO THE EXPECTED TIME OF BACKFILLING.2.DEMAND CALCULATIONS (SEC.43.6.A.3.d)2.A.AUXILIARY DWELLING UNIT/SHOP BUILDING SEPERATE OWTS FROM RESIDENCE AND TREATMENT LEVEL 1 (TL1).2.B.AVERAGE DAILY WASTEWATER FLOW (ADWF) AND ORGANIC LOAD RATE (BOD5) USING TABLE 6-2:2.B.1.SINGLE FAMILY DWELLING: 75 gpd & 0.2 BOD5 lbs/day,2.B.2.ADU (LAVATORY: 8.4 gpd & 0.021 BOD5 lbs/day, WATER CLOSET (TOILET): 24.8 gpd & 0.029 BOD5 lbs/day)2.B.3.ADWF = 75 gpd * (1 BEDROOM * 2 PEOPLE) + 8.4 gpd (ADU) + 24.8 gpd (ADU)= 183.2 gpd;2.B.4.BOD5 lbs/day= 0.2 * (1 BEDROOM * 2 PEOPLE) + 0.021 + 0.029= 0.45 lbs/day; BOD5 mg/L = BOD5*1,000,000 = 0.45 lbs/day*1,000,000 = 294.52 mg/L ADWF*8.34 183.2 gpd*8.342.B.5.CBOD5 = BOD5 * 0.85 = 251 mg/L3.SEPTIC TANK (SEC.43.9.B.2.d):3.A.SEPTIC TANK: TANK SIZE FOR NEW INSTALLATIONS OTHER THAN SINGLE FAMILY RESIDENCE = 500 GALLON MIN TWO CHAMBERTANK.3.B.THE TANK IS NOT SUBJECT TO BUOYANCY.4.ABSORPTION AREA CALCULATIONS4.A.THE ABSORPTION AREA IS DOWNHILL OF THE TANK. THEREFORE, GRAVITY FLOW TREATMENT.4.B.SOILS ANALYZED BY BOUNDARIES UNLIMITED INC. (MAY 14, 2021) IN 8' DEEP TEST PIT; BROWN SANDY SILTY LOAM (TYPE-2);AVERAGE PERCOLATION RATE OF THREE HOLES = 24 MPI; USE TREATMENT LEVEL 1 LONG TERM ACCEPTANCE RATE (LTAR) OF0.60gpd/SF.4.C.MINIMUM SOIL TREATMENT AREA, A: A = ADWF = 183.2 = 306 S.F. LTAR 0.60 gpd/S.F.4.D.SIZE ADJUSTMENT FACTORS: GRAVITY TRENCH = 1.0; CHAMBER BED = 0.74.D.1.A, adj = 306 SF * 1.0 * 0.7 = 215 SF4.E.GRAVELLESS CHAMBER SYSTEM:4.E.1.INFILTRATOR QUICK4: 215 SF / 12 SF/UNIT = 18 UNITS IN A TRENCH CONFIGURATION4.E.2.ADS BIODIFFUSER (STANDARD): 215 SF / 15 SF/UNIT = 15 UNITS IN A TRENCH CONFIGURATION5.THIS SYSTEM IS SIZED FOR TYPICAL DOMESTIC WASTES ONLY. BACKWASH OR FLUSHING FLOWS FOR REVERSE OSMOSIS UNITES OR WATERSOFTENERS 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 PREVENTINFILTRATION.8.INSTALL RISERS AS NECESSARY TO BRING ALL ACCESS PORTS TO FINAL GRADE. PORTS SHALL ME 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 3-FEET.UNDER NO CIRCUMSTANCES SHALL COVER BE LESS THAN 2-FEET.10.SITE PLAN INFORMATION FROM GOOGLE EARTH AND SITE MEASUREMENTS CONDUCTED ON MAY 14, 2021.11.LOCATIONS OF ALL COMPONENTS MAY BE VARIED AS NECESSARY AS LONG AS ALL MINIMUM DISTANCES AND GRADES MEET THOSEREQUIRED.SITE EVALUATION1.SITE AND SOIL EVALUATIONS WERE PERFORMED BY:BRUCE D LEWIS, PEBOUNDARIES UNLIMITED INC.923 COOPER AVE., STE. 201GLENWOOD SPRINGS, CO 81601970.945.52522.EVALUATION DATE(S): MAY 14, 2021.3.SETBACK REQUIREMENTS FOR A TREATMENT LEVEL 1 STA TRENCH/BED, UNLINEDSAND FILTER OR SEEPAGE PIT (PER TABLE 7-1) AND AN ADWF=55.3. GPD:3.A.SPRING OR WELL=100'3.B.POTABLE WATER SUPPLY LINE=25'3.C.STRUCTURE WITH BASEMENT/CRAWLSPACE=20'3.D.STRUCTURE WITHOUT BASEMENT/CRAWLSPACE=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): 3' (TREATMENT LEVEL 1,PRESSURE DOSING)4.SETBACK REQUIREMENTS FOR THE SEPTIC TANK SHALL BE (PER TABLE 7-1):4.A.SPRING OR WELL=50'4.B.POTABLE WATER SUPPLY LINE=10'4.C.STRUCTURE WITH BASEMENT/CRAWLSPACE=5'4.D.STRUCTURE WITHOUT BASEMENT/CRAWLSPACE=5'4.E.PROPERTY LINE, PIPE OR LINED IRRIGATION DITCH=10'4.F.INTERMITTENT IRRIGATION LATERAL, INFILTRATION STRUCTURE=10'4.G.LAKE WATER COURSE, IRRIGATION DITCH, STREAM OR WETLAND=50'4.H.DRY GULCH, CUT BANK OR FILL AREA=10'4.I.STA TRENCH/BED, UNLINED SAND FILTER OR SEEPAGE PIT=5'ATTACH REMOVABLE CAP ORTHREADED CLEANOUT ASSEMBLY.INSTALL MARKER IF CAP IS TOBE BURIED.FLOWFINISH GRADE4"Ø PVC RISER4"Ø 45° BEND4" PVC WYE4"Ø SEWER LINESURFACETYPE 2LIGHT TANSANDYSILTY LOAMScale: N.T.S.CleanoutScale: N.T.S.Site & Soils Evaluation SOIL EVALUATION1.SOIL PERCOLATION TESTS IN THENATIVE SOILS (LIGHT TAN SANDYSILTY LOAM WAS MEASURED TOBE 24 MPI, SOIL TYPE OF 2 ANDA LTAR OF 0.6 GPD/SF.2.NO BEDROCK OR GROUNDWATER ENCOUNTERED WITHNEGLIGIBLE TOPSOIL.8'0030'60'Scale: 1" = 30'ByRevisionNo.Date
923 Cooper AvenueSuite 201Glenwood Springs, CO 81601tele: 970.945.5252fax: 970.384.2833Engineer or Surveyor SealSheetClient Information:PROJECT NO.FILE NAME:Designer:Drafter:Date:N:\PROJECTS\2021\21024-Ryan OWTS 165 Meadow Dr Rifle\dwg\21024-OWTS.dwg 5/17/2021 2:18 PM
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2.5/17/21APLBDL21024-owts.dwg21024970.309.9388Rifle, CO 81650165 S Meadow DrGuy & Sarah RyanGarfield County, Colorado
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165 S Meadow Dr Silt, CO 81652
Onsite Wastewater Treatment System
Ryan Auxilary + Shop OWTS
C.1MAINTENANCE NOTES1.TO ENCOURAGE THE HEALTH AND LONGEVITY OF THE OWTS SYSTEM, THE OWNER SHALL CONSIDER THEFOLLOWING:1.A.MINIMIZE THE AMOUNT OF WATER THAT GOES DOWN THE DRAIN, THE BETTER YOUR SYSTEM WILLWORK.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 OTHERSTRONG 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 DRAIN1.K.MINIMIZE USE OF CHLORINE BLEACH AND TOILET ADDITIVES.2.THE OWNER SHALL CONTRACT WITH A SEPTIC TANK INSPECTOR TO INSPECT THE TANK ANNUALLY FORGREASE AND SEDIMENT ACCUMULATION. THE INSPECTOR SHALL REMOVED AND PROPERLY DISPOSEDOF ACCUMULATED GREASE AND SEDIMENT AS NEEDED TO ENSURE PROPER FUNCTION OF THE SYSTEM.GENERAL ABSORPTION AREA NOTES1.INSTALL CHAMBER UNITS IN ACCORDANCE WITHMANUFACTURER'S RECOMMENDATIONS.2.ABSORPTION TRENCHES SHALL BE 3' WIDE OR LESSAND PARALLEL THE GROUND SURFACE CONTOURS.PARALLELING TRENCHES SHALL BE SEPARATED BYA DISTANCE OF 6' MIN.3.THE BOTTOM OF THE ABSORPTION TRENCHESSHALL BE LEVEL AND THE BOTTOM ANDSIDEWALLS MUST BE RAKED TO REMOVE ANY SOILSMEARS INCURRED DURING THE EXCAVATION.FAILURE TO DO SO MAY REQUIRE THE CONTRACTORTO REPLACE THE ABSORPTION FIELD AT HIS/HEROWN EXPENSE.4.DRAINAGE SWALES ARE TO BE PROVIDED ABOVEAND AROUND THE FIELD, AS NECESSARY, TOPREVENT SURFACE RUNOFF FROM ENTERINGABSORPTION AREA.5.NO EXCAVATION OF THE ABSORPTION FIELD IS TOBE DONE DURING WET WEATHER AND USE OFRUBBER TIRE VEHICLES OVER THE ABSORPTIONAREA IS STRICTLY PROHIBITED.6.UNSUITABLE MATERIAL EXISTING WITHIN THE FIELDSHALL BE EXCAVATED AND BACKFILL SHALLCONSIST OF IMPORTED LOAMY SAND OR SANDYGRAVEL. THE ENGINEER SHALL BE CONTACTED IFBEDROCK OR GROUNDWATER IS ENCOUNTERED INTHE OVER-EXCAVATION.7.TOPSOIL COVER MAY BE VARIED (1-FOOT MINIMUM,2-FOOT MAXIMUM) TO ALLOW FOR LANDSCAPING.BOTTOM MUST BE LEVEL AND FLAT OVERENTIRE AREA TO WITHIN 0.05'±. (TYP.)IF NECESSARY TO ACHIEVE THISSURFACE, IMPORT CONCRETE SAND TOUSE AS LEVELING MATERIAL.REMOVE ANY ENCOUNTERED BOULDERSAND BACKFILL WITH LOAMY SAND ORSANDY GRAVELS. DO NOT USECOMPACTED MATERIALS.ATTACH REMOVABLE CAP ORTHREADED CLEANOUT ASSEMBLY.INSTALL MARKER IF CAP IS TOBE BURIED.4"Ø COUPLING (UNION).USE A HOLE SAW TO CUTOUT CIRCLE OFF THECENTER OF THE UNIT4"Ø PERFORATED PVC PIPE.EXTEND PIPE TO REST ONBOTTOM OF THE BED4"Ø PVC SOLIDPIPE CUT TO FITGRAVELLESS CHAMBER SYSTEM:INFILTRATOR QUICK 4, ADVANCED DRAINAGESYSTEMS ARC36, OR ENGINEER APPROVEDEQUAL.36"COVER WITH 4" OF TOPSOILAND REVEGETATE12" MIN.,24" MAX.48" MIN. ABOVESEASONAL HIGHGROUNDWATERScale: N.T.S.Pressure Dosing Chamber TrenchVicinity Map1"=150'NOTE:INSTALL EFFLUENT FILTER IN TANK19082B
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INEER 5/17/21NATIVE ONSITE MATERIALSPARSE VEGETATION ANDNEGLIGIBLE TOPSOIL