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�i <br /> Chevron Quarterly Groundwater Monitoring Report(4Q2000) Page 2 of 2 <br /> Facility #9-2033—508 West Charter Way,Stockton,CA Date March 8,2001 <br /> i' DISCUSSION: <br /> Gettler-Ryan Inc performed this groundwater monitoring and sampling event on November 21 and December 2, <br /> 2000 Samphng was performed on December 2,2000 Sequoia Analytical of Walnut Creek,California performed <br /> groundwater analysts Each groundwater sample was analyzed for total petroleum hydrocarbons(TPH), benzene, <br /> toluene, ethyl benzene and xylenes(BTEX), and methyl tertiary butyl ether(MtBE) Monitoring well(MW)-1 was <br /> also analyzed for semi volatile organics by EPA Method 8270,total oil&grease(TOG)and five metals by EPA <br /> Method 200 <br /> Laboratory results report Monitoring Well (MW)-1 contained total petroleum hydrocarbons as diesel (TPHd)at a <br /> concentration of 94 ppb,and Xylene and MtBE were reported in MW-1 I 1 ppb and 230 ppb, respectively <br /> Chromium and was reported at 20 4 ppb and Zinc was reported at 32 7 ppb Results for MW-2 and MW-3 reported <br /> no TPH, BTEX or MtBE <br /> Groundwater elevations generally decreased across the site when compared with the previous monitoring event <br /> Groundwater flow was to the east to northeast at 0 007 ft/ft <br /> LIMITATIONS: ' <br /> The findings presented in this letter are based on data and interpretations provided by Gettler-Ryan, Inc Gettler- I <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 /> Ga e <br /> Senior 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 /> Pearl Myer, 1120 South Hunter Street, Stockton,CA 95206 <br /> i <br />