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S E C 0 R <br /> Victoria McCartney <br /> July 2, 2003 <br /> Page 2 <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL.of the 6 Concentration in yWL(Well ED) Concentration In pgfL(Well ID) <br /> Total Samples <br /> TPHg 1 ND 1,300(MW-7) <br /> Benzene 1 ND 25(MW-7) <br /> MtBE 0 ND ND <br /> Definitions: <br /> MDL=Method Detection Limit <br /> pglL=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 /> S€COR International Incorporated <br /> I M. Evans <a <br /> Project Manager <br /> ATTACHMENTS: <br /> • Attachment A—April 4, 2003,Groundwater Monitoring& Sampling Report by Gettler-Ryan Incorporated <br /> cc: Mr. Robert J. Cochran, Chevron Environmental Management Company, San Ramon, CA <br /> Mr.Jim Barton, Regional Water Quality Control Board-CVR, Sacramento, CA <br /> Greyhound Lines, Dallas, TX <br /> • <br /> i:lChevron1905571Periodic Monitoring120031202003 QMR 90557.doc SECOR International Incorporated <br />