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• Live Oak searched both databases on September 29, 2015 for any listed sites <br /> within one-quarter mile of the Site. The subject Site was not listed on either <br /> database. One facility was identified within one-quarter mile of the Site: <br /> • Unocal Oil Company, Galli pad area, Union Island Field, Geo Tracker <br /> Cleanup Sites. Live Oak reviewed information on file for this facility at the <br /> San Joaquin County Environmental Health Department on October 2, <br /> 2015. According to the Soil and Groundwater Assessment Report by <br /> Dames & Moore (1996), the Galli pad is located adjacent to the north and <br /> west of the center of the subject Site. The report investigated the <br /> presence of mercury in soil and groundwater near the blow-off valves of <br /> the separators for the gas wells. Mercury was found to be present in soil, <br /> including free elemental mercury at one location; however, the mercury <br /> was not found to extend more than 0.5 feet below the ground surface. <br /> Mercury was only detected in one groundwater sample; the level detected <br /> was below the MCL. The file also contained a 1996 letter from Unocal <br /> indicating its intention to remove the mercury-contaminated soil. The case <br /> was closed by the California Regional Water Quality Control Board <br /> (Regional Board) in 2012. The closure letter implies that the Regional <br /> Board has no evidence that the soil removal ever took place; however, <br /> based on the limited extent of contamination, Regional Board "staff do not <br /> • consider the Site a cleanup site." <br /> 7.2 Environmental Health Department Databases <br /> Live Oak reviewed the San Joaquin County Environmental Health Department's <br /> Hazardous Materials, Hazardous Waste Generators, Underground Storage <br /> Tanks, Aboveground Storage Tanks, Site Mitigation, and Leaking Underground <br /> Storage Tanks lists dated August 2015, for facilities of concern within one-quarter <br /> mile of the Site. The following facilities were identified: <br /> • AM Farms, 9010 W. Howard, subject Site. This facility is included on <br /> the Hazardous Materials, Hazardous Waste Generators, and <br /> Aboveground Storage Tanks lists. <br /> • Unocal Corp./Union Island Pipeline Co./Torch Operating Co./CA <br /> Resources Prod. Corp., 9009 & 8018 W. Howard, adjacent to the north of <br /> the Site. This facility is included on the Hazardous Materials, Hazardous <br /> Waste Generators, Underground Storage Tanks, and Site Mitigation lists. <br /> Live Oak reviewed records on file for this facility (9009) at the San Joaquin <br /> County Environmental Health Department on October 2, 2015. According <br /> to the Hazardous Materials Facility Inventory, this facility maintains <br /> produced water/condensate, soap/foamer (surfactants), mercaptan <br /> (tetra hydrothiophene), motor oil, nitrogen gas, waste oil, triethylene glycol, <br /> • and Baker X-cide 102 (glutaraldehyde) on-site. A 1994 Complaint <br /> Investigation Form indicated that a driver had noticed a mercaptan odor <br /> LOGE 1522 8 <br />