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28 September 2022 Project No. 22-6994 Page 4 of 15 AdvancedGeo An Employee Owned Company ADDRESS: 16460 Escalon Bellota Road LOCATION: 120 feet to south SEPTIC SYSTEM: 1) Permit date July 1963; new installation of septic system: 3,600 - gallon tank with two compartments, distribution box (D -Box), five leach lines totaling 153 feet, and three 48 -inch diameter, 25 -foot -deep seepage pits; 2) Permit date June 1969; new installation of septic system: 1,200 -gallon tank with two compartments, distribution box (D -Box), one 50 -foot -long leach line, and one 14 -foot -deep seepage pit. ADDRESS: 15885 Escalon Bellota Road LOCATION: 200 feet to west SEPTIC SYSTEM: 1) Permit date May 1984; new installation of septic system: 1,200 - gallon tank with two compartments, distribution box (D -Box), two 40 -foot -long leach lines, and two 32 -inch diameter, 10 -foot -deep sumps. ADDRESS: 16522 Escalon Bellota Road LOCATION: 400 feet to south SEPTIC SYSTEM: 1) Permit date November 1993; new installation of septic system: 1,200 -gallon tank with two compartments, distribution box (D -Box), two 40 -foot -long leach lines, and two 36 -inch diameter, 25 -foot -deep seepage pits. 3.6. PROPOSED MAXIMUM SEPTIC TANK USAGE ON SITE The current residence on the property has three (3) bedrooms and utilizes the existing septic system 365 days per year. The existing septic system will not be altered from the current configuration. The average and reasonable maximum usage of wastewater for a three-bedroom home by residents is 100 gallons per day (gpd) for the first bedroom and 50 gpd for each additional bedroom for a total of 200 gpd. The new proposed septic system is planned to be located in the southeastern portion of the property, over 100 feet away from the existing onsite domestic water well and the surrounding water wells (Figure 2). The proposed septic system will consist, at minimum of a 1,200 -gallon septic tank and leach lines totaling 100 feet. The proposed septic system will service the planned two-bedroom modular home to be developed on the property. The proposed system will be used by the two-bedroom residence 365 days per year. The average and reasonable maximum usage of wastewater for a two-bedroom home by residents is 100 gpd for the first bedroom and 50 gpd for each additional bedroom for a total of 150 gpd. 4.0. GROUNDWATER INFORMATION - REGIONAL HYDROGEOLOGY The Geologic Map of California, published in 1966 by the California Department of Conservation Division of Mines and Geology, shows the site area within the Great Valley Syncline (GVS), a large, elongate, northwest trending structural trough. The GVS is subdivided into two major divisions designated the Sacramento and San Joaquin Valleys, which have been filled to the present elevation with thick sequences of sediment ranging