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N <br /> b <br /> Advanced <br /> GeoEnvironmental , Inc . :- <br /> 18 December 2002 � <br /> AGE Project No . 96-0229 n LE= ! i� V1D <br /> ULU 2 0 2002 <br /> Mr. Mike hifuma <br /> San Joaquin County Environmental Health Department ENVIRONMENT HEALTH <br /> 304 East Weber Avenue, Third Floor <br /> PERMIT/SERVICES <br /> Stacicton, CA 9522 <br /> Subject: Summary of 17 December 2002 Meeting <br /> PACIFIC CAR WASH <br /> 4405 Pacific Avenue, Stockton, California <br /> Dear Mr. Infurna: <br /> On 17 December 2002, ameetingwas held at the office of,4dvanced GeoEnvironmental, Inc. (AGE) <br /> to discuss the need for interim remediation and the need for further site investigation at the above <br /> referenced site. The following parties participated in the meeting: <br /> • Mr. Mike Infurna, San Joaquin Environmental Health Department <br /> • Mr. Tim Cuellar, AGE, consultant for Pacific Car Wash (4405 Pacific Avenue) <br /> • Mr. Bill Little, AGE, consultant for Pacific Mini Mart (4511 Pacific Avenue) <br /> • Dr. Calvin Lee, AGE, Senior Project Geologist <br /> The following items were discussed during the 17 December 2002 meeting: <br /> 1 . A domestic water well was located by AGE at the residential property located immediately <br /> west of the site. Although the domestic water well was inferred to be cross-gradient from the <br /> site, Mr. Infurna was concerned about the well ' s status; since the area is served by municipal <br /> water, the well may no longer be operational and may need to be properly abandoned. Mr. <br /> Infurna recommended that AGE contact the property owners to verify the well' s status. <br /> 2 . AGE discussed the need for interim remediation (i.e. ground water extraction) at the site to <br /> implement hydraulic control and inhibit further offsite migration of the dissolved petroleum <br /> plume. Between October 1998 and June 2001 ( 11 sampling events), ground water samples <br /> collected at monitoring well MW-9 did not detect any petroleum constituents of concern <br /> (well MW-9 is located approximately 275 feet east of the site); however, between September <br /> 2001 and November 2002 (6 events), TPH-g, BTEX compounds, MTBE and TBA were <br /> detected at concentrations as high as 4,000 micrograms per liter (µg/1). Furthermore, a trend <br /> 837 Shaw Road, Stockton , California 95215 <br /> Telephone (209) 467- 1006 FAX (209) 467- 1118 <br />