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Home My WebLink AboutOWTS DesignXXXXXXXXXCounty Road No. 309 (60' R.O.W.)54605455545054455440543554305425542054155395539053855380 N33° 45' 16"E 261.81' (TIE)Proposed 4 Bedroom w/ Beauty Shop 76 (4x19) QUICK 4 INFILTRATOR UNITSOR 60 (4x15) ADS ARC UNITSPROFILE PIT, TYP. TIE TO PROPERTY CORNER TO BE ASBUILT UPON COMPLETION C/O PP PP PP 5' MIN. Lot Size: 37.68± Ac. SS SS SS SS C/O Ex. OWTS1-1/4''Ø1- 1 / 4 ' ' Ø 1- 1 / 4 ' ' Ø 1- 1 / 4 ' ' Ø 1- 1 / 4 ' ' Ø 1- 1 / 4 ' ' Ø 1-1/4''Ø1-1/4''ØF V F V F V F V 4"Ø SCH.40 OR SDR35 PVC @ 2% MIN. & 2-WAY CLEANOUT (SEE DETAIL) CDPHE APPROVED 1,500-GALLON PRECAST CONCRETE THREE (3) CHAMBER SEPTIC TANK W/ HIGH HEAD PUMP ASSEMBLY (SEE DETAIL) INSPECTION PORT AT EACH END OF EACH CHAMBER ROW, TYP.>>>>>>CONSTRUCT A 12" DEEP SWALE ABOVE THE ABSORPTION FILED 380 LF 1-1/4"Ø SCH.40 TRANSPORT PIPE FROM THE TANK TO THE SOIL TREATMENT AREA (STA). SLOPE THE PIPE TO DRAIN BACK TO THE TANK WITH NO SAGGING IN THE PIPELINE FLUSH VALVE ASSEMBLY, TYP. (SEE DETAIL) Ex. Shop & ADU THE WELL IS LOCATED SOUTH OF THE EX. SHOP & ADU BUILDING 37110DERIC J O N WA L T ERCOLOR A D O LICE N S EDPROF E SSIONA L E N GINEER1/13/22 SURFACE 6"-12" TOPSOIL 6' TO 7'VERY SANDY,SLIGHTLY CLAYEY SILT 00 40'80' Scale: 1" = 40' SITE EVALUATION 1.SITE AND SOIL EVALUATIONS WERE PERFORMED BY: DERIC J. WALTER, PE DANIEL E. HARDIN, PE BOUNDARIES UNLIMITED INC.KUMAR & ASSOCIATES, INC. 923 COOPER AVE., STE. 201 5020 C.R.#154 GLENWOOD SPRINGS, CO 81601 GLENWOOD SPRINGS, CO 81601 970.945.5252 970.945.7988 2.EVALUATION DATE(S): SEPTEMBER 2020 & JUNE 2021. 3.SETBACK REQUIREMENTS FOR A TREATMENT LEVEL 1 STA TRENCH/BED, UNLINED SAND FILTER OR SEEPAGE PIT (PER TABLE 7-1) AND AN ADWF < 1000 GPD: 3.A.SPRING OR WELL=100' 3.B.POTABLE WATER SUPPLY LINE=25' 3.C.POTABLE WATER SUPPLY CISTERN=25' 3.D.DWELLING=20' 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 FEED) 3.SETBACK REQUIREMENTS FOR THE SEPTIC TANK SHALL BE (PER TABLE 7-1): 3.A.SPRING OR WELL=50' 3.B.POTABLE WATER SUPPLY LINE=10' 3.C.POTABLE WATER SUPPLY CISTERN=25' 3.D.DWELLING=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' Vicinity Map Scale: N.T.S. Site & Soils Evaluation SOIL EVALUATION 1.GEOTECHNICAL EVALUATION INDICATED AND SITE OBSERVATION CONFIRMED ABOUT 6 TO 12 INCHES OF TOPSOIL OVER VERY STIFF, LOW PLASTIC VERY SANDY,SLIGHTLY CLAYEY SILT TO A PROFILE DEPTH OF 6-FEET (TYPE-2A). THE ASSOCIATED TREATMENT LEVEL 1 LONG TERM ACCEPTANCE RATE (LTAR) IS 0.50 gpd/SF. 2.USDA SOIL TEXTURE CALCULATOR RESULTS: SILT LOAM. 2.1.% SAND: 38 2.2.% CLAY: 11 2.3.% SILT: 51 NORTHMAINTENANCE 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. 3.THE OWNER SHALL FOLLOW THE GUIDANCE OUTLINED IN THE OPERATIONS AND MAINTENANCE (O&M) MANUAL PROVIDED BY THE PUMP AND TANK MANUFACTURERS. Battlement Mesa Parachute SITEI-70 NORTH ByRevisionNo.Date923 Cooper Ave., Ste. 201 Glenwood Springs, CO 81601 (T) 970.945.5252 www.bu-inc.com Engineer or Surveyor Seal Sheet Client Information: PROJECT NO. File Name: Designer: Drafter: Date:N:\PROJECTS\2021\21033-Perdue OWTS\dwg\21033-V-Topo.dwg 1/13/2022 9:13 AMSubsurface Utility Engineering (SUE) Required Project: If "Yes", SUE Certification by: Firm: Job #: Date:987654321/13/22 DJW DJW 21033-v-topo.dwg 21033 970.948.1735 Parachute, CO 81635 PO Box 476 Michael Perdue Garfield County, Colorado1.Parcel ID: 2407-054-00-0086Onsite Wastewater Treatment System (OWTS)Perdue ResidenceC.1 NO N/A N/A N/A SYSTEM 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 ENGINEER MUST OBSERVE THE CONSTRUCTED SYSTEM BEFORE BACKFILL AND PROVIDE A LETTER OF INSPECTION AS REQUIRED BY THE LOCAL AGENCY. A REQUEST FOR INSPECTION MUST BE MADE BY THE CONTRACTOR AT LEAST 48-HOURS PRIOR TO THE EXPECTED TIME OF BACKFILLING. 2.DEMAND CALCULATIONS (SEC.43.6.A) 2.A.FOUR (4) BEDROOM RESIDENCE PLUS BEAUTY SHOP WITH ONE (1) CHAIR 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.BEAUTY SHOP: 100 gpd/CHAIR * 0.70 BOD5 lbs/day 2.B.2.ADWF = 75 gpd * (3 BEDROOMS * 2 PERSONS/BEDROOM + 1 BEDROOM * 1 PERSON/BEDROOM) + 100 gpd * 1 CHAIR = 625 gpd 2.B.3.BOD5 = 0.20 lbs/day * (3 BEDROOMS * 2 PERSONS/BEDROOM + 1 BEDROOM * 1 PERSON/BEDROOM)+ 0.70 lbs/day * 1 CHAIR = 2.10 lbs/day BOD5 mg/L = BOD5*1,000,000 = 2.10 lbs/day*1,000,000 = 403 mg/L ADWF*8.34 625 gpd*8.34 2.B.4.CBOD5 = BOD5 * 0.85 = 343 mg/L 3.SEPTIC TANK (SEC.43.9.B.2.a): 3.A.48 HOURS DETENTION: ADWF * (48 HRS/24 HRS) = 1,250-GALLONS STANDARD STORAGE + 50% DOSING STORAGE = 1,875 GALLONS 3.B.INSTALL A 1,500-GALLON THREE-COMPARTMENT TANK WITH A HIGH HEAD DOSING PUMP ARRANGEMENT (2,000-GALLON TOTAL). 3.C.THE TANK IS NOT SUBJECT TO BUOYANCY. 4.ABSORPTION AREA CALCULATIONS 4.A.GROUNDWATER WAS NOT ENCOUNTERED, THE SITE SLOPES AT THE OWTS ARE BETWEEN 4-8%. THEREFORE, THE SYSTEM SHALL BE A SHALLOW GRAVELLESS CHAMBER SYSTEM IN A PRESSURE DOSED BED CONFIGURATION. 4.B.SOILS WERE ANALYZED BY KUMAR & ASSOCIATES, INC GEOTECHNICAL ENGINEERS 09/23/20; PROJECT NO.20-07-416) AND SITE CONFIRMED BY BOUNDARIES UNLIMITED INC (6/26/21). THE LONG TERM ACCEPTANCE RATE (LTAR) IS ESTIMATED AT 0.50 gpd/SF (SEE THE SITE & SOILS EVALUATIONS DETAIL). 4.C.MINIMUM SOIL TREATMENT AREA, A: A = ADWF = 625 = 1,250 SF LTAR 0.50 gpd/SF 4.D.SIZE ADJUSTMENT FACTORS: PRESSURE DOSED BED= 1.0; CHAMBERS= 0.7 4.D.1.A, adj = 1,250 SF * 1.0 * 0.7 = 875 SF 4.E.GRAVELLESS CHAMBER SYSTEM: 4.E.1.INFILTRATOR QUICK4: 875 SF / 12 SF/UNIT = 73 UNITS IN BED CONFIGURATION (USE 76 IN A 4x19 CONFIGURATION). 4.E.2.ADS ARC 36: 875 SF / 15 SF/UNIT = 59 UNITS IN A BED CONFIGURATION (USE 60 IN A 4x15 CONFIGURATION). 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. 11.PRESSURE DISTRIBUTION DESIGN: 11.A.DOSE SIZE: 30 GALLONS 11.B.PUMP ON TIME: 120 SECONDS 11.C.DOSES PER DAY: 21 11.D.PIPE DIAMETER/MATERIAL: 1-1/4"Ø SCH.40 PVC 11.E.ORIFICE SIZE/SPACING: 3/32"Ø AT 5' 0.C. 11.F.OPERATING HEAD AT THE DISTAL END ORIFICE: 5' 11.G.PUMP INFORMATION: ORENCO MODEL PF30 HIGH HEAD EFFLUENT PUMP (1/2 HP, 115V, 1"Ø, 60Hz)(DESIGN POINT OF 15 GPM @ 42' TDH), OR MANUFACTURER APPROVED EQUAL. 11.H.DRAIN-BACK VOLUME FROM FORCEMAIN: 29.5 GALLONS 11.I.DESIGN SOFTWARE REFERENCE: ORENCO SYSTEMS PUMPSELECT V. 2.18, PUMP DATA FILE 1.11 (2018). Scale: N.T.S. Cleanout Scale: N.T.S. Flush Valve 4" PVC TEE/RISER 4" PVC TEE/RISER WITH EFFLUENT FILTER ON THE TANK OUTLET FLOW ATTACH REMOVABLE CAP OR THREADED CLEANOUT ASSEMBLY. INSTALL MARKER IF CAP IS TO BE BURIED. FINISH GRADE 4"Ø PVC RISER4"Ø PVC TWO-WAY CLEANOUT TEE 4"Ø SEWER LINE 1-1/4"Ø PVC DISTRIBUTION PIPE 1-1/4"Ø PVC ELBOW 1"Ø BALL VALVE & TREADED ASSEMBLY FOR BACKFLUSHINGIRRIG. VALVE BOX 1"x-1/4" PVC REDUCER GENERAL ABSORPTION AREA NOTES 1.BOUNDARIES UNLIMITED INC. SHALL BE CONTACTED IMMEDIATELY IF BEDROCK OR GROUNDWATER IS ENCOUNTERED IN THE OVER-EXCAVATION. 2.INSTALL CHAMBER UNITS IN ACCORDANCE WITH MANUFACTURER'S RECOMMENDATIONS. 3.THE BOTTOM OF THE ABSORPTION FIELD 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.TOPSOIL COVER MAY BE VARIED (1-FOOT MINIMUM, 2-FOOT MAXIMUM) TO ALLOW FOR LANDSCAPING. Scale: N.T.S. Chamber Bed System 12' (MAX.) EX. GRADE 3:1 M A X 2% MIN UNDISTURBED NATIVE TOPSOIL BOTTOM TO BE LEVEL AND FLAT OVER ENTIRE AREA TO WITHIN 0.05'±. (TYP.), COMPACT REPLACEMENT SOIL TO 90% STANDARD PROCTOR AND RACK THE SURFACE TO REMOVE SOIL SMEARS. 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. GRAVELLESS CHAMBER SYSTEM: INFILTRATOR QUICK 4, ADVANCED DRAINAGE SYSTEMS BIODIFFUSER (STANDARD), OR ENGINEER APPROVED EQUAL. TOPSOIL FILL CIRCULAR IRRIGATION-STYLE VALVE BOX & COVER - LID COLOR PURPLE OR GREEN - LABEL "SEWER" 5' MIN. 1-1/4"Ø PRESSURE DOSING PIPE WITH 3/32"Ø HOLES DRILLED EVERY 5' O.C. FACING UP WITH ONE (1) HOLE FACING DOWN AT THE END OF EACH LATERAL (FOR WEEPING). INSTALL A 12" PAVER OR SPLASH STONE BELOW THE DOWN FACING HOLE TO PREVENT SOIL EROSION.