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I` <br /> IS EC ® R <br /> Harlin Knoll <br /> u � <br /> January 29, 2004 <br /> Page 2 <br /> �n ! <br /> a <br /> Y <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 10 Concentration In pglL(Well ID) Concentration in pg/L(Weil ID) <br /> Total Samples <br /> TPHg 5 83(MW-1) 2,500(MW 2) <br /> Benzene 2 17(MW-2) 63(MW-4D) <br /> MtBE 2 9(MW-3) 52(MW-4D) <br /> TBA 0 ND NDi <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 /> /obW Jackson Jr r <br /> Staff Geologist <br /> Attachments <br /> a <br /> Attachment 1 Groundwater Monitoring&Sampling Report by Gettler-Ryan, Incorporated, Dated November 20,2003 <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 Richard Berger, Berger&Company,Turlock, CA <br /> A <br /> 1, <br /> v2111J <br /> � t A <br /> X2 A�Fhf! <br /> ly�n <br /> IChevron1932321Periodic Mon itonng1200314O2003 QMR 93232 doc SECOR International Incorporated � <br /> i4 � <br />