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S E C 0 R <br /> Victoria McCartney <br /> July 31, 2003 <br /> • Page 2 <br /> i <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 10 Concentration In yg/L(Well ID) Concentration in pWL(Well ID) <br /> Total Samples <br /> TPHg 3 260(MW-5S) / 1,400(MW-6S) <br /> 1 400(MW-8) <br /> Benzene 0 ND ND � <br /> MtBE 4 29(MW-4) 21,000(MW-8) i <br /> TBA 2 880(Mw-8) 1,200(Mw-6S) <br /> TAME 3 150(MW-5S) — 1,100(MW-8) <br /> Definitions <br /> MDL=Method Detection Limit <br /> ,ugIL=Micrograms per Liter <br /> ND =Non Detect <br /> Should you have any questions or concerns regarding these activities, please feel free to contact me <br /> at (916) 861-0600, extension 234 <br /> �1 Sincerely, <br /> SECOR International Incorporated <br /> avid M Eva <br /> Project Manager <br /> ATTACHMENTS <br /> • Attachment A—June 4,2003, Groundwater Monitoring& Sampling Report by Gettler-Ryan Incorporated <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 /> f <br /> 11Chevron1914521Penodic Monitormg120031202003 QMR 91452 doc SECOR International Incorporated <br />