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S E C ® R <br /> Mr Harlin Knoll <br /> October 26, 2004 <br /> Page 2 <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 4 Concentration in Ng1L(Well ID) Concentration in pg1L(Well ID) <br /> Total Samples <br /> TPHd 2 51(MW-3) 760(MW-4) <br /> TPHg 1 ND 4100(MW-4) <br /> Benzene 0 ND ND <br /> MtBE 2 45(MW-4) 650(MW-3) <br /> Definitions <br /> MDL=Method detection limit <br /> pg/L= Micrograms per liter <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 me at <br /> • (559) 271-2650 <br /> Sincerely, <br /> SECOR International Incorporated <br /> j4 <br /> George orsythe <br /> Project Manager <br /> Attachments <br /> Attachment A August 18, 2004, Groundwater Monitoring & Sampling Report by Gettler- <br /> 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 /> Mr Joe Neely, Cambria, Sonoma, CA <br /> 11Chevron1982641Penodic Monitoring1200413Q2004 QMR 98264 doc SECOR International Incorporated <br />