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ti <br /> Values and Assumptions: <br /> /#43?- h� . <br />` ly 1= 109,460 gals—total WWlyr=14,634 cu ft=2.01. in/yr <br /> 2.01 Ac x 43,560 sq ft/Ac x (1 ft/12 in) <br /> i <br /> 4 ,093 � i <br /> Nw=42 mg NIL <br /> d = Assume 25%due to high fine-grained clay soil throughout soil.profile. <br /> R = 15 in/yr. 2 <br /> N1= Assumed to be 0.1 ppm NO3-N <br /> ('70 <br /> 2.01 in/�(42 mg NIL) tl_-0.25)+(15 .in/yr x 0.l mg-7.0 r <br /> Nr (2.01 in/yr+ 15 in/yr) <br /> Nr = 3.8 pp as nitrate-nitrogen(NO3-N)or 17 ppm as nitrate (NO,) <br /> l <br /> C. SEPTIC SYSTEM OPERATIONAL PARAMETERS AND COMPONENTS <br /> SSS§ 3.7. Discussion of efficient operation,disposal field-longevity, and environmental protection <br /> k are based upon the environmental parameters discussed within this report. An example of the <br /> 4 <br /> system to be constructed is as follows, and is based upon-the EHD SeS wage Standards. <br /> SEPTIC TANK <br /> a <br /> Septic tanks store the accumulated sludge, scum and effluent(clear zone)volumes,which in turn affect <br /> treatment of nitrogen within the tanks. j <br /> Detention Time Example: <br /> Detention Time =2,000 gal total tank capacity x 0.90 (10%volume lost to sludge/scum accumulation) � <br /> 1.0 (Peaking.factor)x 1,475 gals/day(ADF) <br /> Detention Time= 1.2 days. The minimum acceptable detention time is 1.0 day. Therefore,a 2,000 gallon <br /> septic tank is suitable for sufficient detention time. <br /> LEACHLINE REQUIREMENT EXAMPLE CALCULATION BASED ON SAN JOAQUIN <br /> COUNTY SEWAGE STANDARDS FOR COMMERCIAL SEPTIC SYSTEMS: <br /> Base Tank a Capacity— 1,200 gal. Since the neatest anticipated daily-flow" will occur on Fridays at 1,475 gPd <br /> , <br /> the system must be adequate to manage these flows. <br /> Leachline Equivalent Requirement= 1,200 gallons BTC+ 1,475 ADF x 0.250 clay Soil Factor(SF)= I <br /> 670 lineal feet of leachline(LFLL) required. <br /> 5 -42 inch diameter seepage pits=5 x 80 ft of leachline equivalent=400 ft <br />• 4- 70 ft sections of leachline=280 ft <br /> 400 ft+280 ft =680 equivalent lineal feet of leachline. <br /> Chesney Consulting <br />