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The primary filter bed, and ultimately the 100%replacement area filter bed will consist of Standard Infiltrator Chambers® SC (Shallow Cover). Six inch spacers must be used in-between the chambers. The pressure laterals will hang from the tops of the chambers with the effluent trickling down over the louvers. Backfill soil over the chambers must consist of a sandy loam material, with four to six inches of cover soil material over the chambers. A grass-type plant may be planted over the disposal area so that the plant roots can evapotranspire effluent from the louvers during favorable times of the year. Septic Tanks Influent from Mr. Rios' house will gravity flow into a 1,200 gallon, septic tank Effluent from this tank will level, or near-level gravity to the 2,000 gallon septic tank An Orenco Biofilter® will be installed in the be installed in the second compartment. Effluent from the Biofilter will be pumped to be equally distributed throughout the Infiltrator Chambers filter bed system. This 2,000 tank will provide preliminary treatment and trap paper, etc. The tank must be pumped on a prescribed interval basis depending on direct observations of paper and scum accumulation; e.g., every six months to every three years, depending on sludge/scum accumulation. Peaking factors for users on septic tanks vary with usage during the hour of the day, and day of the week. Peak hourly rates are associated with normal working hours. The ratio of the peak day to the average day can vary from 1.5 to >5, depending upon the usage. However,peaking factors are not as relevant since the effluent pump will dose on demand. A peaking factor of 2.5 (average between 0 and 5) will be used in the calculation below: Septic Tank Hydraulic Detention Time Detention Time= 1,200+2,000 izal septic tank capacity x 0.70(30%volume lost to sludge/scum accumulation) 2.5 (Peaking Factor)x 400 gals/day ADF Detention Time=2.2 days. The minimum acceptable detention time is 1.0 days. Therefore, a 1,200 gallon septic tank for the residential use and a 2,00 gallon tank for the winery is adequate. Primary and 100% Replacement Filter Bed Area The filter bed area is calculated in the procedure described in Section 8.7 of the San Joaquin County Sewage Standards and EHD Document 42-01-004: Calculation Requirements for Commercial Septic Systems: OP-4/1 Base Tank Capacity(BTC) = 1,200 gals / Lineal Feet of Leachline (LFLL) = 1,200 BTC +400 ADF x 0.225 Soil Factor based on a loam soil at 24 inches below grade where the soil-effluent interface will occur= 360 LFLL Filter Bed Area= 360 x 3 (Loam Soil Factor)= 1,080 square feet. The primary filter bed area is proposed to be rectangular in area: 25 ft wide x 43 ft long= 1,075 sq. ft. The manifold is to be at the northern end. QHS4ri.• All Y y Chesney Consulting