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S E C 0 R <br /> Ms. Victoria McCartney <br /> January 23, 2003 <br /> • Page 2 <br /> Number of Detections <br /> above the MDL of the B Minimum Maximum <br /> Constituents Total Samples Concentration In pg/L(Well ID) Concentration in p9IL(Well ID) <br /> TPI-Ig 1 ND 1,400(MW-7) <br /> Benzene 1 ND 19(MW-7) <br /> MtBE 0 ND ND <br /> Definitions: <br /> MDL=Method detection limit <br /> pg/L=Micrograms per Liter <br /> ND =Not detected <br /> Should you have any questions or concerns regarding these activities, please feel free to contact <br /> David Evans at (916) 861-0400, extension 234. <br /> Sincerely, <br /> • SECOR International Incorporated <br /> vi M. Evans <br /> Project Manager <br /> ATTACHMENTS: <br /> • Attachment A—November 10, 2003, Groundwater Monitoring& Sampling Report by Gettler-Ryan <br /> Incorporated <br /> cc: Robert J. Cochran, Chevron Environmental Management Company, San Ramon,CA <br /> Jim Barton, Regional Water Quality Control Board, Sacramento, CA <br /> Greyhound Lines, Dallas, TX <br /> 1:1Chevron1905571Periodic Monitoring1200314Q2003 QMR 90557.doc SECOR lntemational Incorporated <br />