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Sequoia <br />Analytical <br />Gettler Ryan, Inc - Dubhn <br />6747 Sierra Court Suite J <br />Dublin CA 94568 <br />Project Chevron <br />Project Number Chevron #9-5775 <br />Project Manager Scott Polston <br />Volatile organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />Result Lunit Units Dilution Batch Prepared Analyzed <br />404 N Wlget Lane <br />Walnut Geek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequolalalba tarn <br />Reported <br />26 -Jul -00 10 48 <br />Method N <br />EFF (W007366-01) Water Sampled <br />19 -Jul -00 10 05 <br />Received 19 -Jul -00 14 00 <br />lert-Butyl alcohol <br />ND <br />100 ugli 1 OG20015 19 -Jul -00 19 -Jul -00 EPA 8260A <br />Methyl tcrt butyl ether <br />ND <br />20 <br />Di-lsoprapvl ether <br />ND <br />20 <br />Ethyl tent -butyl ether <br />ND <br />20 <br />tert-Amyl methyl ether <br />ND <br />20 „ <br />Surrogate Dibromofluoromethane <br />920% 50-150 n <br />Surrogate 1,2-Dichloroethane-d4 <br />960% 50-150 <br />MP -2 (W007366-02) Water Sampled <br />19 -Jul -00 10 09 <br />Received 19 -Jul -00 14 00 <br />tert-Butyl alcohol <br />ND <br />100 ugfl 1 OG20015 19 -Jul -00 19 -Jul -00 EPA 8260A <br />Methyl Cert -butyl ether <br />ND <br />20 „ <br />Dt-isopropyl ether <br />ND <br />20 <br />Ethyl tert-butyl ether <br />ND <br />20 <br />tertAmyl methyl ether <br />ND <br />20 <br />Surrogate Dibromofluoromethane <br />Surrogate 1,2-Dichloroethane-d4 <br />920% 50-150 " <br />900% 50-150 " <br />MEP -1 (W00736643) Water Sampled 19 -Jul -00 10 16 Received 19 -Jul -00 14 00 <br />tett-Butyl alcohol ND 100 ugfl 1 OG20015 19 -Jul -o0 19 -Jul -00 EPA 8260A <br />Methyl tori -butyl ether ND 20 " ^ <br />Di -isopropyl ether ND 20 <br />Ethyl tart -butyl ether ND 20 <br />tett Amyl methyl ether ND 20 <br />Surrogate Dibromofhtoromethane 940% 50-150 " <br />Surrogate 1,2-Dichloroethane-& 940% 50-150 " <br />• <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples anahzed m accordmwe with the churn of <br />custody document Thu analyttral report must be reproduced in its entr� <br />Page 5 of 11 <br />III <br />