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I Phase 1 Environmental Site Assessment Project a:99-1261 Proposed AutoZone Site.Manteca.California February 19. 1999 Page 14 Oil & Gas Wells There were no oil or gas wells observed on the subject site or on adjacent sites during the site reconnaissance. Additionally, the Munger Oil & Gas Maps reviewed for subject site indicated that there are no oil fields located beneath the subject site and that there are no wells associated with the site (Munger, 1997). Phvsical Setting Analysis For Migrating Hazardous Substances The potential for migration of hazardous materials on to the subject site from offsite sources is considered possible given the current uses and proximity of adjacent sites with recognized environmental concerns and the groundwater gradient beneath the subject site. However, during the Phase II - Limited Environmental Site Assessment performed on the subject site, there was no evidence that would suggest that the contaminants associated with the known unauthorized release on the adjacent property had impacted the soils or groundwater beneath the subject site. VI. PHASE II - LIMITED ENVIRONMENTAL SITE ASSESSMENT To assess the possibility that the an unauthorized release of petroleum hydrocarbons associated with the adjacent property to the south of the subject site had adversely impacted the soils beneath the subject site,three (3) borings were advanced along the property line. The three (3) borings were advanced to depths of fifteen (15) feet below the existing ground surface with soil samples being obtained at five (5) foot increments. The soil samples were obtained and processed in accordance with an work plan approved by the County of San Joaquin (appendix). The soil samples obtained during the Phase II - Limited Environmental Site Assessment were analyzed for Total Petroleum Hydrocarbons and purgeable aromatic hydrocarbons in accordance with the DHS Modified Method 8015-m and with EPA Method 8020, respectively. The results of the soil analysis indicated that the contamination associated with unauthorized release on the adjacent site to the south has not adversely impacted the soils beneath the subject site. VII. FINDINGS AND CONCLtiSIONS Anthony-Taylor Consultants has performed a Phase I Environmental Site Assessment of the property located on the western side of South Main Street on the northern half of the property currently occupied by Dons Mobil Glass (151 South Main Street) in the City of Manteca, County of San Joaquin, California. This investigation has been conducted in conformance i