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Chtvron Quarttrly Groundwattr Monitoring Report(492000) Page 2 of 2 <br /> 1 auLty 49-4275—2905 West Buijannn Holt Drive Stockton CA Date. 1 tbrnary IS 2001 <br /> DISCUSSION: <br /> This groundwater monitoring and sampling event was performed by Gettler-Ryan Inc on December 14, 2000 Ten <br /> wells were sampled during this event TPHg was reported in MW-I and MW-2 at concentrations of 60 6 and 67 0 <br /> respectively TPHg labs results noted results may be elevated due to the presence of single analyte peaks in <br /> quantitation range Benzene was detected In MW-B at a concentration of 0 753 ppb MtBE was reported in nine <br /> wells at concentrations ranging from of 4 83 ppb in MW-7 and 217 ppb in MW-1 MtBE concentrations increased <br /> in all but one well when compared to laboratory data from the previous quarter Groundwater elevations across the <br /> site increased an average of approximately 0 42 feet this quarter Groundwater flow was northwest at 0 0007 to <br /> 0 002 tt/tt <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 tree to call us at(916) 861-0400 <br /> Sincerely, <br /> SECOR International Inc <br /> ott Gable <br /> Senior Geologist <br /> ATTACHMENTS: <br /> • Attachment A—January 16,2001 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 /> Mark List, RWQCB-CVR, 3443 Routier Road, Suite A, Sacramento, Ca 95827 <br />