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s Econ <br /> Ms:Victoria McCartney <br /> January 24, 2005 <br /> Page 2 <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 9 Concentration in pg1L(Well ID) Concentration in pg1L(Well ID) <br /> Total Samples <br /> TPHg 2 160(MW-6S) 660(MW-8) <br /> Benzene 0 ND ND <br /> MtBE 2 3,100(MW-6S) 15,000(MW-8) <br /> Definitions: <br /> MDL=Method detection limit <br /> pgIL=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)861-0400 extension 234. <br /> Sincerely, <br /> SECOR International Incorporated <br /> avid M. Evans <br /> Project Manager <br /> ENCLOSURES: <br /> Attachment 1 —December 17, 2004 Groundwater Monitoring & Sampling Report by Gettler- <br /> Ryan Incorporated <br /> cc: Darin Rouse, ChevronTexaco Environmental Management Company, San Ramon, CA <br /> Jim Barton, Regional Water Quality Control Board, Rancho Cordova, CA <br /> i <br /> i <br /> f <br /> I:1Chevron1914521Periodic Monitoring120041402004 QMR 91452.doc SECOR International Incorporated <br /> i <br />