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15 December 2020 AdvancedGeo Project No. 05-1278 An Employee-Owned Company Page 3 of 14 � extend 100 feet to the northeast and southwest. The septic system is permitted for a commercial property and is utilized 365 days/year (Figures 3 and 4; Appendix B). The proposed septic system will include the addition of a 6,400 W sump (20' x 40' x 8') to the existing septic system to accommodate the restroom and shower additions. The sump will be located in the northern portion of the planter area, to the east of the site building, and connected with a four-foot tight line to the eastern septic tanks. The septic system will be utilized 365 days a year by the subject property. 3.1 . EXISTING ON-SITE SEPTIC TANK USAGE The septic system servicing the subject property consists of three 1,500-gallon septic tanks with two compartments, a distribution box, a tight line, and two 100-foot long leach lines. Two septic tanks are located to the east of the site building and the third tank and leach lines are located on the west side of the property, approximately 40 feet north of the truck repair building. The system is permitted for a commercial property and is utilized 24 hours/day, 365 days/year by approximately 15 employees and the general public (Figures 3 and 4; Appendix B). 3.2. SITE SEPTIC PERMIT HISTORY There are several liquid wastewater (septic) permits on file at the San Joaquin County Environmental Health Department (EHD) for the subject property, the following is a summary of the permits on file: • EHD Permit #21137, dated October 1966: Addition of one 60-foot long leach line and 240-cubic foot sump permitted for a commercial property. • EHD Permit #81-317, dated May 1981: New installation/replacement of a 1,000- gallon septic tank and two 70-foot long leach lines permitted for a commercial property. • EHD Permit #82-703, dated December 1982: Repair/addition of a 1,900-gallon septic tank and 1,200 square-foot filter bed permitted for a commercial property. • EHD Permit #90-2300, dated August 1990: Repair/addition of one 1,500-gallon septic tank and two 100-foot long leach lines permitted for a commercial property. Copies of the liquid waste permits are provided in Appendix B. 3.3. ON-SITE SEPTIC TANK REPAIR HISTORY There are two septic tank repair/addition permits on file at the EHD for the property, the following is a summary of the permits on file: