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HomeMy WebLinkAboutOWTS Report 09.28.2016Title: Design Calculations Project Name: Cretti Onsite Water Treatment System Project Location: 0415 Bendetti Lane Silt, Colorado Designer Name: Vance V King, PSE Date: September 28, 2016 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 Given: Single Family Residence: Perk test data : Cretti Residence 0415 C.R. 250, Silt, CO Waste Water Disposal System Page 1 of 4 By: V King 09/29/2016 Meas. lime N6nutes Elapsed ' Test Hole 1 Test Hole 2 Test Hole 3 Water Level Drop(in.) Perk Rate (Mri./ln.) Water Level Drop (in.) Perk Rate (Nin./In.) Water level Drop (in.) Perk Rate (Nin./In.) 0:00 0:15 15.00 0.75 20.00 0.75 20.00 0.75 20.00 0:30 15.00 05 30.00 0.5 30.00 0.75 20.00 0:45 15.00 0.5 30.00 0.5 30.00 0.75 20.00 1:00 15.00 0.25 60.00 05 30.00 0.5 30.00 Hole Perk Rate: 60.00 30.00 30.00 Ave Perk Rate 40.00 711i" t„,„_ 4LJ in Req'd: Septic System Design SoI'n: Septic Tank Tank Total Volume Vtankl= if'Ni„ dG3 II(10!10•gal) else 11(1000 • gal +(N1,r.,j-3)•250-grid) 1250 rjrnl [Table 9-1] \\SERVER\CivcoFiles\1 PROJECTS\2016\21 Structures\residential\brown, dennis\cretti\mcdx\cretti septic.mcdx CIVCO Engineering, Inc. PO Box 1758, Vernal, UT, 84078 Ph: (435)789-5448 Fx: (435)789-4485 lst Compartment Volume Cretti Residence Page 2 of 4 0415 C.R. 250, Silt, CO By: V King Waste Water Disposal System 09/29/2016 V tank Vlst comp:2 = 625 qa.t Absorption Area Maximum Daily Flow Q:= if Ni„.d<2 300 y- al day else ifNb,1=3 450 gal_ day else if Nr„ ,1 > 3 450 gal + 011„ day Long Term Acceptance Rate (LTAR) Perk Rate nii.n t: t=40 in Soil Type: 2A gal LTAR := 0.5 day ft` initial Soil Treatment Area STA:= - =1050 fLTARt d — 3) 75 gal day [4.9.B.4.a] =525 gal [Table 6-1] day [Table 10-1] \\SERVER\CivcoFiles\1__PRO)ECTS\2016\21_Structures\residential\brown, dennis\cretti\mcdx\cretti septic.mcdx CIVCO Engineering, Inc. PO Box 1758, Vernal, UT, 84078 Ph: (435)789-5448 Fx: (435)789-4485 Cretti Residence Page 3 of 4 0415 C.R. 250, Silt, CO By: V King Waste Water Disposal System 09/29/2016 Soil Treatment Area for Trenched Chambers Application Method Size Adustment Factor SAF,11, : 1.0 (Gravity) Distribution Media Size Adustment Factor SAF,,,,,: 0.7 (Chambers) Combined Size Adustment Factor SAF:= if SAF:in, • SAF,;4, > 0.5 SAF,1n,•SAF„nr else 110'5 STAT(•:- STA • SAF 735 ..1 2 =0.7 [Table 10-2] [Table 10-3] [Sec 43.10.D.3] Chamber Length Only the open bottom area applies. [Sec 43.10.C.1] Chamber bottom Width B := 34 in (Biodiffusers & Quick4 Units) Required overall length of trenched chambers LT,,.:= STB-r� 259.412 f B, \\SERVER\CivcoFilesjl PROJECTS\2016\21_Structures\residential\brown, dennis\cretti\mcdx\cretti septic.mcdx CIVCO Engineering, Inc. PO Box 1758, Vernal, UT, 84078 Ph: (435)789.5448 Fx: (435)789-4485 Cretti Residence 0415 C.R. 250, Silt, CO Waste Water Disposal System 5011 1 reatment Area tor Bedded Lhambers Application Method Size Adustmentfactor SAFA f : 1.2 (Gravity) Distribution Media Size Adustment Factor SAF„nf: 0.7 (Chambers) Combined Size Adustment Factor SAF:=if SAFAnf•SAF1) J>0.5 = 0.84 OSAFAAi•SAF1),1 else STA 1(.:®STA •SAF— 882 »' Chamber Length Only the open bottom area applies. Page 4 of 4 By: V King 09/29/2016 [Table 10-2] [Table 10-3] [Sec 43.10.D.3] [Sec 43.10.C.1] Chamber bottom Width B, = 34 i7e. (Biodiffusers & Quick4 Units) Required overall length of bedded chambers LHS,: STA „r B„ 311.294 f. \\SERVER\CivcoFiles\1_ PROJECTS\2016\21.._Structures\residential\brawn, dennis\cretti\mcdx\cretti septic.mcdx