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30 March 2022 <br />Project No. 22-6800 <br />Page 4 of 15 <br />AdvancedGeo <br />An Employee -Owned Company <br />ADDRESS: 10676 West Ripon Road <br />LOCATION- Adjacent property to west <br />SEPTIC SYSTEM: 1) Permit date June 1991; repair/addition of septic system: one 100 - <br />foot -long leach line. <br />ADDRESS: 10871 West Ripon Road <br />LOCATION: Adjacent property to North <br />SEPTIC SYSTEM: 1) Permit date November 1983; new installation of septic system: <br />1,200 -gallon concrete tank with two compartments, distribution box (D -Box), and three <br />70 -foot -long leach lines. <br />ADDRESS: 10901 West Ripon Road <br />LOCATION: Approximately 300 feet to northeast <br />SEPTIC SYSTEM: 1) Permit date June 1994; new installation of septic system: 1,200 - <br />gallon concrete tank with two compartments, distribution box (D -Box), one 80 -foot -long <br />leach line, and one 6 -foot by 10 -foot sump. <br />ADDRESS- 10954 West Ripon Road <br />LOCATION: Approximately 300 feet to southeast <br />SEPTIC SYSTEM: 1) Permit date March 1962; new installation of septic system: 800 - <br />gallon pre -cast tank with two compartments, distribution box (D -Box), one 50 -foot -long <br />leach line; 2) Permit date January 2008; new installation of septic system: 1,200 -gallon <br />concrete tank with two compartments, distribution box (D -Box), and 20 -foot by 36 -foot <br />filter bed. <br />3.6. PROPOSED MAXIMUM SEPTIC TANK USAGE ON SITE <br />The current residence on the property has three (3) bedrooms and utilizes the existing <br />septic system 365 days per year. The existing septic system will not be altered from the <br />current configuration. The average and reasonable maximum usage of wastewater for a <br />three-bedroom home by residents is 100 gallons per day (gpd) for the first bedroom and <br />50 gpd for each additional bedroom for a total of 200 gpd. <br />The new proposed septic system is planned to be located in the northwestern portion of <br />the property over 100 feet away from the existing onsite domestic water well and the <br />surrounding water wells. The proposed septic system will service the planned three- <br />bedroom modular home to be developed on the property. The proposed septic system <br />will be used by the three-bedroom residence 365 days per year. The average and <br />reasonable maximum usage of wastewater for a three-bedroom home by residents is <br />100 gpd for the first bedroom and 50 gpd for each additional bedroom for a total of <br />200 gpd. <br />4.0. GROUNDWATER INFORMATION - REGIONAL HYDROGEOLOGY <br />The Geologic Map of California, published in 1966 by the California Department of <br />