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Chevron Groundwater Monitoring Report(4Q2000) Page 2 of 2 <br /> Facility 49 8264—3775 Tracy Boulevard,Tracy,CA Date March 19,2001 <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc on December 4, 2000 Three <br /> of the four wells were sampled during this event(MW-3 was inaccessible due to tank work being performed at the <br /> site) TPHd and TPHg were reported in MW-4 at concentrations of 14,000 ppb and 66,000 ppb, respectively <br /> Benzene was reported at a concentration of 550 ppb in MW-4 MtBE was reported at concentrations of 2 9 ppb in <br /> MW-2 and 7,800 ppb in MW-4 Groundwater analytical results were generally consistent with historical data <br /> Groundwater elevations across the site increased an average of approximately 0 44 feet this quarter Groundwater <br /> flow was to the northeast at 0 002 ft/ft,generally consistent with 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 /> I <br /> Sincerely, <br /> SECOR International Inc <br /> i <br /> oge offmore <br /> Associate Geologist <br /> ATTACHMENTS: <br /> • Attachment A—January 31,2001 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 />