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t <br /> Chevron Groundwater Monitoring Report(3Q2002) Page 2 of 2 <br /> Facility #9-9840—4344 Waterloo Road,Stockton,CA Date September 19,2002 <br /> • <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc on July 2,2002 Seven <br /> monitoring wells were sampled during this event TPHg was detected in the sample collected from MW-2 at a <br /> concentration of 67 µg/l Benzene was not detected in any of the samples collected MtBE was detected in five of <br /> the wells sampled at concentrations ranging from 82 µg/I in the sample collected from MW-2,to 4 pg/l in the <br /> samples collected from MW-4 and MW-6 Groundwater elevations across the site decreased an average of <br /> approximately 4 11 feet this quarter Groundwater flow was to the northeast at 0 001 to 0 002 ft/ft, consistent with <br /> historical data <br /> LIMITATIONS: <br /> The findings presented in this letter are based on data and interpretations provided by Gettler-Ryan, Inc Gettler- <br /> Ryan's report is attached The data presented in this summary is accurate only to the degree implied by the sources <br /> and methods used No warranty, expressed or implied, is made by SECOR <br /> If you have any questions,please feel free to call us at(916) 861-0400 <br /> Sincerely, <br /> SECOR International Inc <br /> • �t <br /> Brian Silva <br /> Protect Manager <br /> ATTACHMENTS: <br /> • Table 1 —Screen Intervals <br /> • Attachment A—August 12, 2002 Groundwater Monitoring&Sampling Report by Gettler-Ryan Inc <br /> cc Bob Cochran,Chevron Products Company, P Q Box 6004, San Ramon,CA 94583-0804 <br /> Marty Hartzell,RWQCB-CVR, 3443 Routier Road, Suite A,Sacramento, CA 95827 <br /> Joseph Budiselich,4514 Waterloo Road, Hwy 88, Stockton, CA 95215 <br /> Kevin Lee, Subway,4410 Waterloo Road, Stockton,CA 95215 <br />