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S ECOR <br /> Ms. Victoria McCartney <br /> July 30, 2004 <br /> Page 2 <br /> ti <br /> i <br /> Number of Detections <br /> above the MDL of the 9 Minimum Maximum <br /> Constituents Total Samples Concentration in pgIL(Well 1D) Concentration in pgIL(Well 1D) <br /> TPHg 3 60(MW-5S) r 4,100(MW-6S) <br /> Benzene 0 ND ND <br /> MtBE i' . �+ 3 -RAW-4)(MW 4 D� 76,000(MW-6S) <br /> Definitions: <br /> MDL=Method detection limit 917/bT <br /> pg/L=Micrograms per liter <br /> ND =Non detect <br /> If you have any questions or concerns regarding these activities, .please feel free to contact me at <br /> (916)869-0400 extension 234. <br /> Sincerely, <br /> SECOR International Incorporated <br /> M. Evans <br /> Project Manager <br /> i <br /> i <br /> ATTACHMENTS: <br /> Attachment A—June 14, 2004, Groundwater Monitoring & Sampling Report by Gettler-Ryan <br /> Incorporated <br /> { <br /> t <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 /> I� <br /> i <br /> P <br /> 9 <br /> f <br /> �I <br /> 'f I:1Chevronk914521Periodic Monitoring1200412Q2004 QMR 91452.doc SECOR International Incorporated <br />