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t <br /> Page 2 of 2 <br /> 'Chevron Quarterly Groundwater Monitoring Report(2Q2000) ' <br /> Facility:;99-8264—3775 Tracy Boulevard,Tracy,CA Date: November 10,2000 <br /> 1 <br /> G <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc. on May 23,2000. Four <br /> wells were sampled during this event. TPHd and TPHg were reported in MW-4 at concentrations of 980 ppb and <br /> 1 35,000 ppb,respectively. Benzene was reported at concentrations of 46 in MW-3 and 140 ppb in MW-4. MtBE <br /> was reported at concentrations of 3,100 ppb in MW-4 and 4,100 ppb in MW-3. Chromium(0.015 mg/1)and zinc <br /> (0.031 mg/1)were detected in MW-1. Groundwater analytical results were generally consistent with historical data, <br /> with the exception of benzene being detected in MW-3 for the first time. Groundwater elevations across the site <br /> increased an average of approximately 0.34 feet this quarter. Groundwater flow was to the northeast at 0.001 to <br /> 0.003 ft/ft. <br /> i <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 /> f <br /> i <br /> Rogr Hoffm <br /> Project Manager <br /> 1 f <br /> ATTACHMENTS: <br /> • Attachment A—August 31,2000 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 /> Greg Gurss,Gettler-Ryan Inc.,3164 Gold Camp Drive, Suite 240 Rancho Cordova,CA 95670 <br /> 1 <br />