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Chevron Quarterly Groundwater Monitoring Report(2Q2000) Page 2 of 2 <br /> Facility 99-2033—508 West Charter Way,Stockton,CA Date November 10,2000 <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc on May 31,2000 Three <br /> wells were sampled during this event TPHd was reported in MW-1 at a concentration of 170ppb TPHg was <br /> reported in MW-3 at a concentration of 5,700 ppb Benzene was reported to MW-3 at a concentration of 550 ppb <br /> MtBE was reported at a concentration of 220 ppb in MW-1 and 170 ppb in MW-3 Groundwater analytical results <br /> are generally consistent with historical data,with MW-1 decreasing slightly and MW-3 increasing slightly in <br /> hydrocarbon concentrations Groundwater elevations across the site increased an average of approximately 1 70 <br /> feet this quarter Groundwater flow was to the east to northeast at 0 005 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 /> F-4 <br /> Roger Ffoffmore <br /> Project Manager <br /> ATTACHMENTS: <br /> • Attachment A—September 15,2000 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 Routter Road, Suite A, Sacramento, CA 95827 <br /> Pearl Myer, 1 120 South Hunter Street, Stockton,CA 95206 <br /> Greg Gurss, Gettler-Ryan Inc,3164 Gold Camp Drive, Suite 240 Rancho Cordova,CA 95670 <br />