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Mike Infurna S E C ® R <br /> July 7, 2003 <br /> Page 2 <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 13 Concentration in pg/L(Weil ID) Concentration in pg/L(Well ID) <br /> Total Samples <br /> TPHg 10 72(MW-14) 3,000 (MW 3) r <br /> Benzene 2 0 7(MW-6) 1 (MW-2) <br /> MtBE 2 470(MW-6) 500(MW-11 D) <br /> Definitions ; <br /> MDL=Method Detection Limit <br /> ,ug/L=Micrograms per Liter <br /> Should you have any questions or concerns regarding these activities, please feel free to contact me <br /> at 916-861-0400, ext 279 <br /> Sincerely, <br /> SECOR International Incorporated <br /> Greg McIver <br /> Protect Manager <br /> 4 <br /> ATTACHMENTS <br /> Attachment A—May 16, 2003 Groundwater Monitoring& Sampling Report by Gettler-Ryan Inc <br /> s <br /> cc Robert J Cochran, CEMC, P O Box 6004, San Ramon, CA 94583-0804 <br /> Marty Hartzell, RWQCB-CVR, 3443 Routier Road, Suite A, Sacramento, CA 95827 <br /> Wilbur Smith II, 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 /> • <br /> 11Chevron196171\Periodic Mon itonng120031202003 0MR 96171 doc SECOR International Incorporated <br />