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S EC ® R <br /> Jeffrey Wong <br /> January 29, 2004 <br /> . Page 2 <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 7 Concentration In pg/L(Well ID) Concentration in pg/L(Well ID) <br /> Total Samples <br /> TPHg 0 ND ND <br /> Benzene 0 ND ND <br /> MtBE 5 2(MW-5) 140(MW-2) <br /> Definitions <br /> MDL=Method detection limit TPHg= Total petroleum hydrocarbons as gasoline <br /> ,ug/L= Micrograms per liter MtBE= Methyl tertiary butyl ether <br /> ND = Constituent reported below the laboratory reporting limits <br /> Should you have any questions or concerns regarding these activities, please feel free to contact me <br /> at 916-861-0400 extension 283 <br /> Sincerely, <br /> SECOR International Incorporated <br /> Bob W Jackson Jr <br /> Staff Geologist <br /> a <br /> Attachments <br /> Attachment 1 Groundwater Monitoring& Sampling Report by Gettler-Ryan, Dated November 6, 2003 <br /> cc Mr Robert J Cochran, Chevron Environmental Management Company, San Ramon, CA <br /> Mr Jim Barton, Regional Water Quality Control Board, Sacramento, CA <br /> Mr Joseph Budiselich, Stockton, CA <br /> Mr Kevin Lee, Subway, Stockton, CA <br /> • <br /> 1 1Chevron1998401Periodic Monitoring120031402003 QMR 99840 doc SECOR Intematronal Incorporated <br />