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} G� <br /> Advanced EF1VIrNMENrr;I. HEALIN E� <br /> GeoEnvironment4je jMcpM 1: 2 0 <br /> 23 December 2002 <br /> AGE Project No. 96-0229 <br /> Mr. Nuel Henderson <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, CA 95202 <br /> Subject: Summary of 03 December 2002 Meeting <br /> TOP FILLING STATION <br /> 101 South Wilson Way, Stockton, California <br /> Dear Mr. Henderson: <br /> On 03 December 2002, a meeting was held at the office of the San Joaquin Environmental Health <br /> Department to discuss the need for on-site interim groundwater remediation and the need for further <br /> off-site investigation. The following parties participated in the meeting: <br /> • Mr. Nuel Henderson- San Joaquin County Environmental Health Department <br /> • Mr.Tim Cuellar,Mr.Robert Marty and Dr. Calvin Lee-Advanced GeoEnvironmental,Inc. <br /> The following items were discussed during the 03 December 2002 meeting: <br /> 1. A soil and ground water investigation is currently being conducted at the Top Filling <br /> Station. During the September 2002 monitoring event, MTBE was detected from well <br /> M W-6A at concentrations as high as 43,000µg/1.However,concentrations had previously <br /> been detected as high as 440,000 µg/1 from well VW-313. <br /> 2. A separate soil and ground water investigation is currently being conducted east of the <br /> Top Filling Station by Ground Zero Analysis(GZA) at the Knowles/Roek Property(102 <br /> South Wilson Way. Historically, GZA has reported elevated MTBE concentrations in <br /> their ground water monitoring wells MW-3,MW-4 and MW-14;furthermore,MTBE was <br /> reported during their November 2002 monitoring event at concentrations as high as <br /> 210,000 µg/1. GZA has inferred in previous reports that elevated MTBE concentrations <br /> on the Knowles/Roek Property is probably due to migration of the Top Filling Station <br /> MTBE plume. <br /> 3. A separate soil and ground water investigation is currently being conducted by Stratus <br /> Environmental Inc. (SEI) at Arco Station No. 5469 (130 South Wilson Way), located <br /> 837 Shaw Road,Stockton,California 95215 <br /> Telephone(209)467-1006 FA)C(209)467-1118 <br />