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Chevron <br /> Chevron <br /> Chevron Environmental Management <br /> 111 n,? ! 3 ANI 0 7 Company <br /> April 10, 200'1 6001 Bollinger Canyon Road <br /> P.0.Box 6012 <br /> San Ramon,CA 94583-0712 <br /> Ms. Wendy Cohen <br /> California Regional Water Quality Control Board, Robert D.Mihalovich <br /> Pipeline Program Manager <br /> Central Valley Region Phone:(925)842-1341 <br /> 3443 Routier Road, Suite A Facsimile:(925)842-0213 <br /> Sacramento, California 95827-3003 <br /> Revised Figure 3 <br /> December 2000 Report of Additional Soil and Groundwater Investigation <br /> Pombo Property (APN 232-170-07) <br /> 1755 West 111h Street <br /> Tracy, California <br /> Dear Ms. Cohen: <br /> Enclosed is a revised copy of Figure 3 for the December 2000 Geomatrix Consultants Inc. <br /> (Geomatrix) Report of Additional Soil and Groundwater Investigation, Pombo Property. After <br /> report reproduction, it was noted that this figure erroneously presented a detection of methyl- <br /> tertiary butyl ether(MTBE) of 21 micrograms per liter(µg/1) in the grab groundwater sample <br /> collected from boring GMX-6; MTBE was not detected above the laboratory report limit (1 µg/1) <br /> in this sample. Please replace Figure 3 in your copy of the report with this revised figure. <br /> Thank you for your assistance. If you have any questions or require additional information, <br /> please call Penny Fottrell at (925) 842-1343 or me at (925) 842-1341. <br /> Sin y, _ <br /> Robert D. Mihalovich <br /> Pipeline Program Manager <br /> Enclosure Revised Figure 3 (print date: 3/27/01) <br /> cc: Michael J. Infurna, Jr. - San Joaquin County PHSEHD <br /> Ernie Pombo, Jr. (2 copies) <br /> Scott Kyman - Regency Realty (2 copies) <br /> West Side Irrigation District <br /> Gary Foote - Geomatrix (letter only) <br />