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Mike Infurna S E C ® (R <br /> July 15, 2004 <br /> Page 2 <br /> Humber of Detections Minimum Maximum <br /> Constituents Above the MDL of the 7 Concentration in pg/L(Well ID) Concentration in pgIL(Well ID) <br /> Total Samples <br /> TPHg 7 270(MW-4) 3 400(MW-3) <br /> Benzene 1 ND 0 5(MW-2) <br /> MtBE 1 ND 13(MW-11 D) <br /> Definitions <br /> MDL=Method detection limit <br /> pg/L=Micrograms per liter <br /> ND =Non-detect <br /> Should you have any questions or concerns regarding these activities, please feel free to contact me <br /> at (916) 861-0400, ext 230 <br /> Sincerely, <br /> k <br /> SECOR International Incorporated <br /> Roer Hoffmo <br /> Project Manager t <br /> ATTACHMENTS <br /> Y <br /> • Attachment A—May 17, 2004 Groundwater Monitoring& Sampling Report by Gettler-Ryan Inc <br /> cc Robert J Cochran, CEMC, P O Box 6004, San Ramon,CA 94583-0804 <br /> Marty Hartzell, RWQCB-CVR, 11020 Sun Center Dr, Ste 200, Rancho Cordova, CA 95670 <br /> Phil Johnson, Sims-Grupe Management, 374 Lincoln Center,Stockton, CA 95207 <br /> Donald Bradshaw, Levine-Fricke-Recon, 1900 Powell Street, 12th Floor, Emeryville, CA 94608-1827 <br /> E <br /> i <br /> I IChevron1961711Penodic Monitoring1200412Q2004 QMR 96171 doc SECOR International Incorporated <br />