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S E C 0 R <br /> Harlin Knoll <br /> January 29, 2004 <br /> Page 2 <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 4 Concentration In p91L(Weil ID) Concentration in yg/L(Well ID) <br /> Total Samples <br /> TPHd 1 ND 5,500(MW-4) <br /> TPHg 1 ND 34,000(MW-4) <br /> Benzene 0 ND ND <br /> MtSE 2 150(MW-4) 1,200(MW-3) <br /> Definitions <br /> MDL=Method detection limit TPHg=Total petroleum hydrocarbons as gasoline <br /> pg/L= Micrograms per liter TPHd=Total petroleum hydrocarbons as diesel <br /> ND = Constituent reported below the laboratory reporting limits MtBE=Methyl tertiary butyl ether <br /> Should you have any questions or concerns regarding these activities, please feel free to contact me <br /> at 916-861-0400 extension 283 <br /> Sincerely, <br /> SECOR International Incorporated <br /> Bob W Jackson Jr <br /> Staff Geologist <br /> Attachments <br /> Attachment 1 Groundwater Monitoring & Sampling Report by Gettler-Ryan, Dated November 19,2003 <br /> cc Mr Robert J Cochran, Chevron Environmental Management Company, San Ramon, CA <br /> Mr Jim Barton, Regional Water Quality Control Board, Sacramento, CA <br /> Mr Joe Neely, Cambria, Sonoma, CA <br /> fi <br /> IChevron1982641Penodic Monitonng1200314Q2003 QMR 98264 doc 5ECOR International Incorporated <br />