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PUBLICHEALTH SERV ICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION ": < <br /> Karen Furst, M.D., M.P.H., Health Officer , <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 c'; oaa <br /> 2091468-3420 <br /> D <br /> MICHELLE NOKES C (DIY <br /> ANTIOCH TOYOTA MAY 13 19% <br /> 1810 SOMERSVILLE ROAD <br /> ANTIOCH CA 94509 <br /> RE: DISCOVERY CHEVROLET SITE CODE: 2595 <br /> 1615 W 11TH STREET <br /> TRACY CA 95376 <br /> This letter is to summarize the discussions, at a meeting on May 7, 1998, held in <br /> the office of San Joaquin County Public Health Services, Environmental Health <br /> Division (PHSIEHD), concerning the above referenced site. The following <br /> persons attended the meeting: <br /> Michelle Nokes Discovery Chevrolet Margaret Lagorio PHS/EHD <br /> Ken Mateik Horizon Environmental Jeffery Wong PHS/EHD <br /> Gary Barker Horizon Environmental Lori Duncan PHS/EHD <br /> Analytical results of soil and groundwater samples collected from the site reveal <br /> the existence of petroleum hydrocarbon contamination in the soil and <br /> groundwater. Concentrations of contaminants in the groundwater have <br /> fluctuated (increased and decreased) since the monitoring wells were installed in <br /> September 1994. The most recent soil sample results (February 1998) indicate <br /> that the highest concentrations of soil contamination exist in the former <br /> underground storage tank area (Sample S-10'-GP6) . It is the opinion of <br /> PHSIEHD that the soil contamination in this area is continuing to release <br /> contaminants to the groundwater. Therefore, active remedial alternatives must <br /> be evaluated. <br /> In accordance with the California Underground Storage Tank Regulations Title <br /> 23, Division 3, Chapter 16, Article 11 of the California Code of Regulations, a <br /> Corrective Action Plan (CAP) should be submitted that contains a feasibility <br /> study evaluating at least two remedial alternatives and that proposes the most <br /> cost-effective alternative.,Excavation of contaminated soils has proven to be a <br /> viable remedial alternative in the Tracy area and should be considered for this <br /> site. Once PHSIEHD approves the CAP and conducts public notification, the <br /> A Division of San Joaquin County Health Care Services <br />