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Sequoia Walnut Creek�nget e <br /> t Creek CA 9459598 <br /> (925)988-9600 <br /> Analytical www <br /> (925)`788-9673 <br /> sequolalabs cpm <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> -67.47-Sierra Court-Suite J Project Number_Chevron#-9-6171 Reported — <br /> Dublin CA,94568 Project Manager Deanna L Harding 31-Jul-01 07 59 <br /> MTBE Confirmation by EPA Method 8260B <br /> Sequoia Analytical - Walnut Creek LL - <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW_5(W107262-05)Water Sampled 12-Jul-01 10 40 Received 13-Jul-01 17 35 - <br /> Methyl tent-butyl ether ND 20 ug/l 1 1G26012 26-Jul-01 27-Jul-01 EPA 8260B <br /> Surrogate Drbromofluoromethane 104% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 860% 50-150 " <br /> MW 6(W107262-06)Water Sampled 12-0uWl 12 56 Received 13-Jul-01 17 35 <br /> Methyl tert-butyl ether 75 20 ugA 1 1G26012 26-Jul-01 27-Jul-01 EPA 8260B <br /> Surrogate Dibromofluoromethane 100% 50-150 <br /> Surrogate 12-Dichloroethane-d4 960% 50-150 " <br /> MW 8(W107262-08)Water Sampled 12-Jul-01 15 36 Received 13-Jul-01 17 35 <br /> Methyl tert-butyl ether 900 20 ug/l 10 1G26012 26-Jul-01 27-Jul-01 EPA 8260B <br /> Surrogate Drbromofluoromethane 108% 50-150 <br /> Surrogate 1,2-Dichloroethane-d4 980% 50-150 " <br /> i <br /> i <br /> Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyred in accordance with the c1w <br /> custody document This analytical report must be reproduced in its en <br /> Page 7 of 18 <br />