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Sanguinetti Investments,Circle K Project Number: LGS080546 December 17, 2008 The Comm cial building is proposed to have ten (10)'employees per day. The number of customers,is-estimated'to be32 based on the number of parking spaces on site. The building will be open six (6) days per week with normal business hours. Based on the employee and customer number of the SS/NLS and the San Joaquin County Onsite Wastewater Disposal Standards,,t'he estimated-flow:for an'employee at an office K30 gallons per'day:and fora-customeris 5 gallons per day. The total average daily flow for the commercial building on site is designed for a maximum of 475 gallons per day. Gas Station and Convenience Store The gas station and convenience store is proposed to have approximatelytwo(2) ployees L-er shift;six 6 total-=The huildiri v+iiil fje`'o en24`hours`a'da ,seven 7 da s er.week. P ( ) g p Y '( )4 'Y P Based on the employee and customer number of the SS/NLS, research of local gas station flow numbers and the San Joaquin County Onsite Wastewater Disposal Standards, the estimated flo,Wfor an``em-ployee ata service'station is approximately 30 gallons per day. According to the owner, a'maximum.of-500 customers are estimated per;day. The estimated flow for a customer 'at a gas station is approximately 1.gallon per,day. The maximum daily flow for the gas station and convenience store is estimated to be approximately 680 gallons per day. The maximum daily flow for the commercial building is estimated to be 475 gallons per day, and the maximum daily flow for the convenience store and gas station is estimated to be 680 gallons per day. The maximum daily flow for the site is estimated to 1,155 gallons per day. This number was derived from the SS/NLS, (NOA 2007) and the San Joaquin County Onsite Wastewater Disposal Standards. The long term average daily flow is estimated to be approximately 872 gallons per day (NOA, 2007). The septic system drain field was designed to handle 1,155 gallons per day. The leach field adsorption area was determined by the following: Percolation rate(PR): 50 minutes per inch (mpi) (using slowest percolation rate in shallow soil) Maximum daily t7ow.• 1,155 gallons per day(gpd) Loading Rate: Q(gpd/sf) = 51(PR mpi)^0.5(equation from Manual of Septic Tank Practice} Q = 5/50^0.5 Q = 0.71 gpd/sf Available Adsorption Area: 5.5 sf per lineal foot of leach trench x 2 = 11 Required Adsorption area (sf) = 1,155 gpd/0.71 gpd/sf Required Adsorption area (st) = 1,627 sf 902 Industrial Way•Lodi,CA 95240 209.367.3 701•Fax 209.369.4228 50 Goldenland Ct.,Suite 100 -Sacramento,CA 95834.916.928.4690-Fax 916.928.4697 I 1190 Burnett Ave.,Suite A-Concord,CA 94520.925.609.7224-,Fax 925.609.6324 80N. West Street-Fernley,NV 89408- 775.575.6511-Fax 775.575.2652 ®2007 Neil O.Anderson&Associates,Inc.