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S E C ® R <br /> Mr Harlin Knoll <br /> October 26, 2004 <br /> Page 2 <br /> M <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 8 Concentration in pg/L(Well ID) Concentration In pg1L(Well ID) <br /> Total Samples <br /> TPHd 2 59(MW-7) 61 (MW-5) <br /> TPHg 2 67(MW-7) 560(MW-2) <br /> Benzene 1 ND 36(MW-2) <br /> MtBE 4 5(MW-1) 280(MW-2) <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 /> 3 <br /> Sincerely, <br /> SECOR International Incorporated <br /> 3 <br /> George orsythie <br /> Project Manager <br /> F <br /> Attachments <br /> Attachment A August 27, 2004 Groundwater Monitoring &Sampling Report by Gettler-Ryan <br /> Incorporated <br /> cc Mr Robert J Cochran, Chevron Environmental Management Company, San Ramon, CA <br /> Mr Jim Barton, Regional Water Quality Control Board, Rancho Cordova, CA <br /> Mr Rudy Sanchez,Tracy Express Wash & Lube, Tracy, CA <br /> Ms Stella Rickman,Tracy, CA <br /> Ms Kathryn Pudenz, San Francisco, CA <br /> Mr Robert Kitay, Aquascience, Danville, CA <br /> I IChevroM986321Penodic Monitoring1200413Q2004 QMR 98632 doc SECOR Intornational Incorporated <br /> .e <br />