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Tn3advvelUMID • (Site) and found continuous contamination (Appendix E3) Based on the results of the investigation, the former Chevron site was determined to be the source of the contamination and ' Chevron paid for the cost of remediation at the Tracy Express Wash& Lube (SJC, 1999) ' Former Mobil Station—2375 Trac Blvd Four USTs were removed in 1986 and 10,000 gallons of contaminated groundwater removed from the fuel UST excavation(Table 1) The groundwater beneath the former Mobil Station was significantly contaminated with gasoline, oil and grease, and MTBE (diesel not tested) A pump and treat system was installed at MW-3 in ' 1988 to remove floating product (Appendix E4) In 1992, a product extraction system was i I installed at wells located at the northeast corner The depth to groundwater is 4 5 to 7 feet bgs The flow direction was originally determined to be toward the north-northeast(KE, 1987) (Appendix E4) Currently the site is part of a point monitoring program and the groundwater flow direction is depicted generally toward the northwest with some local variation to the north � ' and west (Appendix E5) A utility corridor map showing potential permeable pathways for movement of contaminated groundwater is provided in Appendix E4 Former Scotties Station - 574 West Grant Lane Road Three leaking fuel USTs were removed in � 1998 and contaminated soil was overexcavated and removed offsite (ASE, 1998) The ' groundwater beneath the former Scotties Station was significantly contaminated with gasoline, diesel, oil and grease, and MTBE Based on a November 2000 report by Aquascience Engineers, Inc , there is a hydrogeologic barrier(i e , clays) to the northwest and downgradient of their site that may be directing groundwater to the west and northeast (ASE, 2000) The ASE cross 1 sections and potentiometric maps are provided in Appendix ES The site has and is being remediated using an ozone sparging system (ASE, 2002b) Former Wheel Country& Service Station— 474 West Grant Line„Road From the early 1960s to tearly-1980s the site was a gasoline station (name undocumented) In 1984 the facility was ' woperated as a motorcycle repair shop called Wheel Country Four USTs (gasoline and waste oil) ere removed in 1986 and soil and groundwater contamination was encountered (Table 1 and Appendix E6) No remediation at the LUSTs was performed The depth to groundwater was Site Assessment Report 10 21 May 2003 ' TREADWELL&ROLLO,INC