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Regarding the discolored soil observed inside the old shop with living space, Mr. <br /> Chiu noted that "used empty lubrication oil drums were stored near the <br /> discoloration areas. The discolored soil was most likely oil stained from residual <br /> oil from the surface of the old oil drums. The discolored soil was put in four <br /> plastic containers and given to San Joaquin County Household Hazardous <br /> Waste for disposal" (correspondence, September 18, 2020). <br /> 6.0 SITE DOCUMENTS <br /> 6.1 Environmental Health Department Records <br /> Hazardous Materials Records <br /> The San Joaquin County Environmental Health Department was contacted <br /> regarding the Site address of 8744 South Roberts Road. According to Willy Ng <br /> of that office, no records are available for the Site address (correspondence, April <br /> 8, 2020). <br /> Well & Septic Permits <br /> Live Oak searched the San Joaquin County Environmental Health Department <br /> well and septic permit files for the Site address. Five permits were identified: <br /> • November 1969 permit for a new septic system at mobile home. <br /> According to the permit, a 1,200-gallon septic tank and two 75-foot leach <br /> lines were installed. Based on the sketch, the mobile home and septic <br /> system would have been to the west of the house. <br /> • December 1978 permit for pipe replacement at well. <br /> • September 1984 permit for addition of one 100-foot leach line to existing <br /> residential septic system. The permit notes an out-of-service well in a <br /> shed to the south of the house (possibly the old water tower). <br /> • July 1987 permit for foot valve replacement at domestic well. <br /> • August 2006 permit for pump replacement at domestic well. <br /> The permits have been included in Appendix 4 of this report. <br /> 7.0 GOVERNMENT AGENCY RESEARCH <br /> 7.1 EPA Databases <br /> The California Environmental Protection Agency (EPA) manages contaminated <br /> sites through two sub-agencies: the State Water Resources Control Board <br /> (SWRCB) and the Department of Toxic Substances Control (DTSC). The <br /> SWRCB's GeoTracker database includes underground storage tank (UST) sites, <br /> LOGE 20-16 6 <br />