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n � <br /> Chevron Quarterly Groundwater Monitoring Report(3Q2000) Page 2 of 2 <br /> Facility #9-8264—3775 Tracy Boulevard,Tracy,CA Date December 15,2000 <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc on August 11, 2000 Four <br /> wells were sampled during this event TPHd and TPHg were reported in MW-4 at concentrations of 13,000 ppb <br /> and 49,000 ppb, respectively Benzene was reported at a concentration of 170 ppb in MW-4 MtBE was reported at <br /> concentrations of 5 6 ppb in MW-2,4,700 ppb in MW-3, and 6,100 ppb in MW-4 Zinc(0 021 mg/1)was detected <br /> in MW-1 Groundwater analytical results were generally consistent with historical data Groundwater elevations <br /> across the site decreased an average of approximately 0 67 feet this quarter Groundwater flow was to the northeast <br /> at 0 002 ft/ft <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 /> RogHo mor <br /> Project Manager <br /> ATTACHMENTS: <br /> • Attachment A—November 1,2000 Groundwater Monitoring& Sampling Report by Gettler-Ryan Inc <br /> cc Bob Cochran,Chevron Products Company, P O Box 6004, San Ramon,CA 94583-0804 <br /> Marty Hartzell, RWQCB—CVR, 3443 Routier Road, Suite A, Sacramento, CA 95827 <br />