The URL can be used to link to this page

Home My WebLink AboutOWTS Design Packet 09.14.2020Design Calculations Bishop Residence On -site Wastewater Treatment System TBD County Road 301 Parachute, Colorado September 14, 2020 CIVCO Engineering Inc Civil Engineering Consultants Vernal, Utah 1256 W. 400 5. Office: 435-789-5448 P.O. Box 1758 Fax: 435-789-4485 Vernal, UT 84078 www.civcoengineering.com CIVCO Engineering, Inc. PO Box 1758, Vernal, UT, 84078 Ph: (435)789-5448 Fx: (435)789-4485 BISHOP RESIDENCE TBD County Road 301 Parachute, Colorado Referenced Calculations Description OWTS SIZING Page 1 By: WK Date: 09/11/2020 Chk'd: wk Date: 09/14/2020 Section contains calculations sizing the components of the On -site Wastewater Treatment System. Design Standards Garfield County Resolution 2018-36 GCR Site Investigation Saturday, August 1, 2020, a backhoe excavator was used to dig two 8-foot deep profile holes near the proposed location of the Bishop on -site wastewater treatment system (OWTS) soil treatment area. Graphic logs of both profile holes are shown in the construction drawing for the OWTS. No standing water, nor evidence of previous groundwater level, was encountered in either profile hole. Percolation test locations were also prepared and presoaked on Saturday, August 1, 2020. Percolation test holes were 10" to 12" in diameter and 12" to 13" deep below the presumed infiltrative surface at 2' below ground level. Percolation tests were perfomed on Sunday, August 2, 2020. The percolation test data is tabulated on Sheet 2 of this document. According to a rough plot plan sketch that was provided to the designer and accompanies this document, a water supply line with cistern will provide water to the propose home form the south west. The approximate location of the cistern is noted on the OWTS construction drawing. 50-foot and 100-foot ofset radii for the cystern are also shown on the constuction drawing. According to Google Earth data, the property slopes south -to -north at approximately 12% in the vicinity of the proposed OWTS. OWTS SIZING - bishop.mcdx CIVCO Engineering, Inc. PO Box 1758, Vernal, UT, 84078 Ph: (435)789-5448 Fx: (435)789-4485 Number of Bedrooms Perk Test Results: BISHOP RESIDENCE TBD County Road 301 Parachute, Colorado Nbed'= 3 OWTS SIZING Page 2 By: WK Date: 09/11/2020 Chk'd: wk Date: 09/14/2020 Minutes Elapsed Test Hole 1 Test Hole 2 Test Hole 3 Water Level Drop (in.) Perk Rate (Min./In.) Water Level Drop (in.) Perk Rate (Min./In.) Water Level Drop (in.) Perk Rate (Min./In.) 30.00 4 7.50 3.25 9.23 3.75 8.00 60.00 3.5 8.57 3 10.00 3.63 8.26 90.00 3.5 8.57 2.38 12.61 3.75 8.00 120.00 3.5 8.57 3.25 9.23 3.5 8.57 150.00 3.5 8.57 3.13 9.58 1.75 17.14 180.00 3.5 8.57 2.63 11.41 2.13 14.08 210.00 4 7.50 2.63 11.41 2.5 12.00 240.00 4.25 7.06 2.63 11.41 2.63 11.41 Hole Perk Rate: 7.06 11.41, 11.41 Ave. Perk Rate: 9.96 SEPTIC TANK Required Tank Volume Vtank:= if Nbed< 3 11( 1000 • ga/) else L1000•gal+(Nb d--3) •250•galj First Compartment Volume V,st comp'= ta V"k 2 = 500 ga/ SOIL TREATMENT AREA Design Flow Q:= = 1000 ga/ [GCR TABLE 9-1] [GCR 43.9.6.4.a] if Nbed< 2 = 450 ga/ [GCR Table 6-1] day 300 gal day else if Nbed= 3 450 gad day else if Nbed> 3 450 gal + (Nbed- 3) 75 day ga/ day OWTS SIZING - bishop.mcdx CIVCO Engineering, Inc. PO Box 1758, Vernal, UT, 84078 Ph: (435)789-5448 Fx: (435)789-4485 BISHOP RESIDENCE TBD County Road 301 Parachute, Colorado Long-term Acceptance Rate (LTAR) OWTS SIZING Page 3 By: WK Date: 09/11/2020 Chk'd: wk Date: 09/14/2020 gal Perk Rate t:= tave = 9.96 mrrr Type 2A soil.... LTAR:— 0.5 day - ft_- Irl [GCR Table 10-1] Unfactored Soil Treatment Area STA•= Q =900 ft2 LTAR Soil Treatment Area (Factored for Trenched Chambers)... Application Method Size Adjustment Factor.... SAFAM:= I .0 (gravity) [GCR Table 10-2] Distrib. Media Size Adjustment Factor SAFoM:= 0.7 (chambers) [GCR Table 10-3] Cumulative Size Adjustment Factor.... SAF:= if SAFAM• SAFoM> 0.5 =0.7 13 IISAFAM • SAFoM else [GCR 43.10.D.3] Trenched Chambers Soil Treatment Area STArc:= SAF• STA= 630 ft2 REQUIRED SOIL TREATMENT AREA (SQ. FT.) = 630 NUMBER OF CHAMBERS PER ROW NUMBER OF ROWS IN SOIL TREATMENT AREA 1 2 3 4 5 6 7 CHAMBER MAKE &MODEL INFILTRATOR QUICK4 PLUS EFFECTIVE CHAMBER WIDTH (INCH) = 32 EFFECTIVE CHAMBER LENGTH (INCH) ; 48 MINIMUM TOTAL CHAMBER LENGTH (FEET) = 236 -- -- 20 15 12 10 9 ADS BIODIFFUSER EFFECTIVE CHAMBER WIDTH (INCH) = 32 EFFECTIVE CHAMBER LENGTH (INCH) = 75 MINIMUM TOTAL CHAMBER LENGTH (FEET) = 236 -- -- 13 10 8 7 6 OWTS SIZING - bishop.mcdx LDAMYTYPE11 g BASALT ADM TTPE1 PPE"' 10.11 VICOOTYMM mPAAweAD.Rms]L R®aW1mgWN LOP. RAND TYPE1 TAN MAW BALnr BASALT MIX TYPE1 PRORLE IIOTEm PROFAE HOLES rifrald- (1:9"619n.1 WASTEWATER TREATMENT STG 1FN COIM WENT LIST 11 OM6 FOXRm PLASM 11RTNSTAMN,D9mndR SERER GRADE AT RMOPEATFRDRDLOWDN PET TEAT S FEES ® OF SrIDTAM EI) BED NLOCEm3MIIARMATERIAL, FEE OF STO Sd1Q P ROEM SOIL OROEER DELETERIOUS LATERAL 339 GALLON GAPACITY•I uuni I.1.R1amRWmLert. MSTE E NSTFD ON TIE COLORADO DEPUO•BOOF RELIC IuuN AM 1311131111.11111 WATER DUALITY CONTROL DIWSIONS'ACCEPTED EPOO MKS FOR MEN EG ORi1OOp19TE WASTEWATERTRPAT@O SYSTEM EDATEDIIBAAIP. PROVIDETIIFTRE EECOR ECM) BARMY FLIER @STALL PER 13939.1120393 SPECRIaTIua GOUTLET EIVERTS EMENE21935 AT LEAST I'LOWERTTWI NET DIVERT. PROVIDE ACCESS \Ym1L1AD OERRBER AND INTO BCC SLIRFADE OF 11 ADS mOgRREWN EACHAMERB OR PER TIE NOWD TAB. MAT S5S 0W Ylcl•t iw1IBkY/f Maki W SSa 11RM1911 AEA T J L 1 S 4 T 1 wR1MTd1 gD1plAnus MIIRRR ORMAmTA wrnl1 .0Q • a ERCTWauo w.Rm STOMA -a RnALLRwa.vrmamrRLR 1119111mBTL_x3L - - m SS 12 10 1 131EC1131 [Kew Immo woo • n LRmTRt OLNmO11fWLn.IRMCN• PS MRMJMTOTALo%MSnt n7f1{TR.[]L - - 13 19 B T L E MIN WRO 11 VVEEIRRIIIIGLPNIDETWPETO CAP AT TOP PEIRaRAIEBOtIom 1EmoEa PRaWDETTmEAomcAP ATTOP 0 fA W z 0 Z 0 Plot Plm cosenem BISHOP Addysaer TBD County Road 301 Parachute. CO 81635 Blared we0 off wPPM s MN�°p Leseh Field farm noted on effected snp:c crgnerit- F ( st o nce tedi tide noted on Reached x�c tom house to owed kook d unp c conk E engineerM0) Approx 470' Rapist most note the Mowing Property holm OWerotrommem rr.e Gmsae/.bed/ehop Seteada Street ewes DtitewgWx1 Co/yetis ac 150' Parcel P: 2405-0840-0085 Bingman Corner Sec-6 Township: 7 Range- 94 A 10' BY 30' 40' Setba dm Front: 25' Sides: 10' Rear. 25' 50' 74 10d Waterlines Sewer km astern/well Sepee/emb Geld AectrIc res/y.opme Homo. eost/.eerdoer Bond over/shed roofs Home delivery Dist®¢ofhome to propertylmes Dhdmeebetween stru = Bearer is responsible to mark placement of home and all other items. Be sure to show hitch end and front and rear doors. Buyer agrees to pay Seller's expenses for any costs lnearred to move or reset home not consistent with the plot plan. Date Stgnp•nrrc Date Sales Professional I) tr St -DLit.] re