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S E C 0 R <br /> Mr Harlin Knoll <br /> April 29, 2005 <br /> Page 2 <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 4 Concentration in pg/L(Well ID) Concentration in pg/L(Well ID) <br /> Total Samples <br /> TPHd 3 ND 270(MW-4) <br /> TPHg 1 ND 1,500(MW-4) <br /> Benzene 0 ND ND <br /> MtBE 2 34(MW-4) 180(MW-3) <br /> Definitions <br /> MDL=Method detection limit <br /> pg/L= Micrograms per Iter <br /> ND = Constituent reported below the laboratory reporting limits <br /> If you have any questions or concerns regarding these activities, please feel free to contact George <br /> Forsythe at(559)271-2650, ext 235 <br /> Sincerely, <br /> SECOR International Incorporated <br /> Georg Forsythe <br /> Project Manager <br /> Attachments <br /> Attachment A March 1, 2005, Groundwater Monitoring & Sampling Report by Gettler-Ryan <br /> Incorporated <br /> cc Mr Darin Rouse, ChevronTexaco Environmental Management Company, San Ramon, <br /> CA <br /> Mr Jim Barton, Regional Water Quality Control Board, Sacramento, CA <br /> Mr Joe Neely, Cambria, Sonoma, CA <br /> f <br /> 1 <br /> a <br /> N IFiles\Projects%Chevron\Retail\#9-82641Periodic Monitoring\2005\1Q2005 QMR 98264 docSECOR International Incorporated <br />