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s r <br /> Chevron Groundwater Monitoring Report(4Q2000) Page 2 of 2 <br /> Facility: #9-0557— 139 South Center Street,Stockton,CA Date: March 19,200E <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc, on December 4, 2000. Five <br /> of the nine wells were sampled during this event. MW-3 had a car parked over the well and the owner could not be <br /> located. MW-5, MW-7, and MW-8 was inaccessible because the scheduled traffic control company did not show <br /> up. MW-9 was not sampled due to the presence of separate phase hydrocarbons. TPHg.was reported in MW-1 at a <br /> concentration of 81 ppb. Benzene was reported as non-detect in the four wells sampled. MtBE was reported in <br /> MW-2 at a concentration of 0.73 ppb. Groundwater flow was to the southeast at 0.003 ft/ft, consistent with <br /> 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 /> Sincerely, <br /> SECOR International Inc. <br /> Rog Hoffmo <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 /> Tom Portele, Greyhound Lines, P.O. Box 660362, Dallas TX 75266-0362 <br />