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Home My WebLink AboutOWTS DesignC/OSSSSSSSSSSSSSSAPPROXIMATE LOCATIONOF EXISTING SEPTIC FIELDAPPROXIMATE LOCATION OF EXISTING1,250-GAL SEPTIC TANK(PUMP THE TANK CLEAN AND CONFIRM THATTHE TEES AND EFFLUENT FILTER ARE IN PLACE)APPROXIMATE LOCATIONOF EXISTING CLEANOUTEXISTING RESIDENCE(1 BEDROOM TO BE ADDED)INSTALL NEW INSPECTIONPORT AT END OF EACHTRENCH EXTENSIONEXISTING CHAMBERSPROPOSEDCHAMBERSEXTEND EACH TRENCH WITHSAME GRAVELLESS CHAMBERUNITS AS EXISTING UNTIL EACHTRENCH MEASURES 69 LF INLENGTH MINIMUMNORTHByRevisionNo.Date 923 Cooper Ave., Ste. 201Glenwood Springs, CO 81601(T) 970.945.5252www.bu-inc.comEngineer or Surveyor SealSheetClient Information:PROJECT NO.File Name:Designer:Drafter:Date:N:\PROJECTS\2022\22041-Uriel OWTS\dwg\Uriel-OWTS.dwg 9/28/2022 3:45 PM Subsurface Utility Engineering (SUE)Required Project:If "Yes", SUE Certification by:Firm:Job #:Date:9. 8. 7. 6. 5. 4. 3. 2.9/28/22APLDJWuriel-owts.dwg22041.01970.404.0302Glenwood Springs, CO 81601144 Cliff Rose WayUriel MellinGARFIELD COUNTY, COLORADO 1. ---- Onsite Water Treatment System (OWTS) 1452 County Road 259 C.1NoN/AN/AN/A0010'20'Scale: 1" = 10'1452 CR 259Tract 21 - Antlers OrchardCounty of Garfield,State of ColoradoParcel No: 2127-342-00-303SITE EVALUATION1.SITE AND SOIL EVALUATIONS WERE PERFORMED BY:GARFIELD COUNTY (PERMIT #SEPT-1-15-3516)2.EVALUATION DATE(S): FEBRUARY 2015.3.SETBACK REQUIREMENTS FOR A TREATMENT LEVEL 1 STA TRENCH/BED, UNLINEDSAND FILTER OR SEEPAGE PIT (PER TABLE 7-1) AND AN ADWF=525 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'SOIL EVALUATION1.THE PERCOLATION RATE WAS OBSERVED BY THE COUNTYAS 16 MPI PER PERMIT #SEPT-1-15-3516. PER TABLE10-1 THIS CLASSIFIES THE SOIL AS USDA LOAMY SANDTYPE 2 AND AN LTAR OF 0.60 GPD/SF.SYSTEM DESIGN & CONSTRUCTION NOTES:1.ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH CDPHE REGULATION 43 ONSITE WASTEWATER TREATMENT SYSTEM (OWTS) REGULATION, MOST CURRENTEDITION AND LOCAL AGENCY REQUIREMENTS WHICH MAY OR MAY NOT SPECIFICALLY BE NOTED ON THE DRAWINGS. THE CONTRACTOR SHALL BE RESPONSIBLE FORKNOWING AND CONFORMING TO SUCH SPECIFIC DETAILS AS ARE REFERRED TO IN THE ABOVE MENTIONED REGULATIONS. THIS DRAWING DOES NOT CONSTITUTE ANOWTS PERMIT. A PERMIT MUST BE OBTAINED FROM APPROPRIATE LOCAL AGENCY. THE CONTRACTOR MUST CONTACT THE LOCAL AGENCY HEALTH DEPARTMENT ANDTHE PROJECT ENGINEER FOR INSPECTIONS OF THE CONSTRUCTED SYSTEM BEFORE BACKFILL. A REQUEST FOR INSPECTION BY THE PROJECT ENGINEER MUST BE MADEAT LEAST 48-HOURS PRIOR TO THE EXPECTED TIME OF BACKFILLING.2.DEMAND CALCULATIONS (SEC.43.6.A.2.h)2.A.EXISTING THREE (3) BEDROOM RESIDENCE WITH A ONE (1) BEDROOM ADDITION TO BE ADDED 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/day2.B.2.ADWF = 75 gpd * (3 BEDROOMS * 2 PERSONS/BEDROOM + 1 BEDROOM * 1 PERSON) =525 gpd2.B.3.BOD5 = 0.20 lbs/day * (3 BEDROOMS * 2 PERSONS/BEDROOM + 1 BEDROOM * 1 PERSON) = 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*8.342.B.4.CBOD5 = BOD5 * 0.85 = 272 mg/L3.SEPTIC TANK (SEC.43.9.B.2.a):3.A.THE EXISTING 1,250-GALLON STANDARD STORAGE TWO-COMPARTMENT TANK (PER TABLE 9-1) WITH AN EFFLUENT FILTER WILL BE UTILIZED FOR THE SYSTEMIMPROVEMENTS.3.B.THE TANK IS NOT SUBJECT TO BUOYANCY.4.ABSORPTION AREA CALCULATIONS:4.A.LONG TERM ACCEPTANCE RATE (LTAR) FOR TREATMENT LEVEL 1 (TL1) OF 0.60 gpd/SF (SEE SITE & SOILS EVALUATION NOTES/DETAIL).4.B.MINIMUM SOIL TREATMENT AREA, A: A = ADWF = 525 = 875 S.F. LTAR 0.60 gpd/S.F.4.C.SIZE ADJUSTMENT FACTORS: GRAVITY TRENCH = 1.0; CHAMBER TRENCH = 0.70 (TABLE 10-1A).4.C.1.A,adj = 875 SF * 1.0 * 0.7 = 613 SF4.D.GRAVELLESS CHAMBER TRENCH SYSTEM4.D.1.GRAVELLESS CHAMBER UNITS: 613 SF / 3' WIDE TRENCH = 205 LF OF TRENCHES / 3 TRENCHES = 69 LF MINIMUM PER TRENCH FOR 3 TRENCHES.4.D.1.1.EXISTING CHAMBER TYPE IS UNKNOWN. TO ACCOMMODATE THE IMPROVEMENTS TO THE RESIDENCE, EXTEND EACH EXISTING TRENCH WITH THE SAMECHAMBERS UNTIL EACH TRENCH IS 69 FEET IN LENGTH MINIMUM.5.THIS SYSTEM IS SIZED FOR TYPICAL DOMESTIC WASTES ONLY. BACKWASH OR FLUSHING FLOWS FOR REVERSE OSMOSIS UNITS OR WATER SOFTENERS AND/OR FILTERSSHOULD 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 CIRCUMSTANCESSHALL 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 MEETTHOSE REQUIRED.NORTHSITEVicinity Map1"=4000'MAINTENANCE NOTES1.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 STRONGCLEANING 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 FOR GREASE ANDSEDIMENT ACCUMULATION. THE INSPECTOR SHALL REMOVED AND PROPERLY DISPOSED OF ACCUMULATED GREASEAND 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.Scale: N.T.S.Typical Chamber Trench System36" MAX.UNDISTURBED NATIVE SOILS6' (MIN.)BOTTOM TO BE LEVEL AND FLAT OVERENTIRE AREA TO WITHIN 0.05'±. (TYP.)REMOVE ANY ENCOUNTEREDBOULDERS AND BACKFILL WITH LOAMYSAND OR SANDY GRAVELS. DO NOTUSE COMPACTED MATERIALS.DO NOT WALK ON OR COMPACTBOTTOM OF TRENCH.FINISHED GROUND - MAINTAIN POSITIVESLOPE AWAY FROM TOP SURFACE OFTHE CHAMBER TRENCHES.PVC COUPLING FOR SUPPORTSTANDARD INSPECTION PORT, TYP. (4"Ø PVCSOLID PIPE CUT TO FIT. LOCATE PER PLANVIEW. ATTACH REMOVABLE CAP OR THREADEDCLEANOUT ASSEMBLY.INFLOW AND OVERFLOWPIPES SHALL ENTER THEUPPER KNOCKOUTSGRAVELLESS CHAMBER SYSTEM:INFILTRATOR QUICK 4, ADVANCEDDRAINAGE SYSTEMS BIODIFFUSER(STANDARD), OR ENGINEERAPPROVED EQUAL.EX. GRADE 10%±1% MIN3:1 MAX GRADEFILLCIRCULAR IRRIGATION-STYLE VALVEBOX & COVER - LID COLOR PURPLE ORGREEN - LABEL "SEWER"3:1 MAX GRADE18" MIN 1' MIN2' MAX1% MINFILLSilt37110DER IC JON WALTERCOL O RADO LICENSEDPROFESSIONAL ENG INEER 9/28/22