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Mike Infurna S E C ® R <br /> April 22, 2003 <br /> Page 2 <br /> • <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 9 Concentration In pg/L(Well ID) Concentration in pglL(Well ID) <br /> Total Samples h <br /> TPHg 9 79(MW-14) 4,300(MW-3) <br /> Benzene 2 0 7(MW-6) 1 (MW-2) 3 <br /> MtBE 1 ND 5 (MW-11 D) 3 <br /> Definitions <br /> MDL=Method Detection Limit <br /> lrg/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 279 <br /> Sincerely, <br /> SECOR International Incorporated <br /> • Greg McIver <br /> Protect Manager <br /> r <br /> ATTACHMENTS <br /> • Attachment A--February 18, 2003 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,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 1 <br /> i <br /> 11Chevron196171\Periodic Monitoring120031102003 QMR doc SECOR International Incorporated <br /> `1 <br />