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{ i <br /> E C O R - <br /> Ms. Victoria McCartney <br /> October 27, 2003 <br /> Page 2 <br /> Number of Detections Minimum Maximum <br /> Total Samples Constituents above the MDL the B Concentration in yg/L(Well 1D) Concentration In pg/L(Well ID) <br /> TPHg 1 ND 3,000(MW-7) <br /> Benzene 1 ND 47(MW-8) <br /> MtBE 0 ND ND <br /> Definitions: <br /> MDL=Method Detection Limit j <br /> iug/L=Micrograms per Liter <br /> ND =Not Detected <br /> I <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 /> P11dM. E�VC—� <br /> Project Manager <br /> ATTACHMENTS: <br /> • Attachment A—August 1, 2003, Groundwater Monitoring &Sampling Report by Gettler-Ryan Incorporated <br /> ce: 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 Monitoring1200313Q2003 OMR 90557 Rev A.doc SE'COR tntemational Incorporated <br />