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n� <br /> S fEC ® R <br /> Vicki McCartney <br /> April 30, 2004 <br /> • Page 2 <br /> a <br /> M <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 3 Concentration In yg/L(Well ID) Concentration in prglL(Well ID) <br /> Total Samples <br /> mss <br /> TPHg 2 59 (MW-2) 7,800(MW-3) <br /> Benzene 2 0 8(MW-2) <br /> 1,000(MW-3) <br /> MtBE 3 2(MW-1) 440(MW-2) <br /> i� <br /> Definitions TPHg =Total petroleum hydrocarbons as gasoline <br /> MDL = Method detection limit MtBE= Methyl tertiary butyl ether <br /> pglL = Micrograms per liter <br /> h <br /> Should you have any questions or concerns regarding these activities, please feel free to contact me <br /> at 916-861-0400, ext 283 <br /> d' <br /> Sincerely, r <br /> SECOR International Incorporated a <br /> Bob W Jackson, Jr <br /> Staff Geologist <br /> Attachments <br /> n <br /> Attachment 1 Groundwater Monitoring&Sampling Report by Gettler-Ryan Inc , dated March 10, 2004 , <br /> cc Robert J Cochran,Chevron Environmental Management Company, San Ramon, CA 94583 <br /> Marty Hartzell, Regional Water Quality Control Board-CVR, Rancho Cordova, CA 95670 <br /> , <br /> t <br /> a <br /> a <br /> IChevron1920331Penodic Monitonng1200411 Q2004 OMR 92033 doc SECOR International Incorporated , <br /> r <br />