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QSequoia <br />� Analytical <br />404 N Wiget lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequolalabs cont <br />Gettler Ryan, Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron #9-5775 Reported <br />Dublin CA, 94568 Project Manager Scott Polston 26 -Jul -00 10 48 <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />�nalvte Result Litrat Units Dilution Batch Prepared Analyzed Method Note <br />EFF(W007366-01) Water Sampled 19,Jul-00 10 05 Received 19 -Jul -0014 00 <br />tert-Butyl alcohol ND 100 ug/l 1 OG20015 19 -Jul -00 19 -Jul -00 EPA 8260A <br />Methyl tert-butyl ether ND 20 " <br />Di -isopropyl ether ND 20 " <br />Ethvl tert-but}1 ether ND 20 " <br />tert-Amyl methyl ether ND 20 " <br />Surrogate Dibromofluoromethane <br />ND <br />920% 50-150 <br />Surrogate 12-Dichloroethane-d4 <br />ND <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 ug/1 1 <br />Methyl tert-butyl ether <br />ND <br />20 <br />Di -isopropyl ether <br />ND <br />20 " <br />Ethyl tent -butyl ether <br />ND <br />20 " <br />tert-Amyl methvl ether <br />ND <br />20 " <br />OG20015 19 -Jul -00 19 -Jul -00 EPA 8260A <br />`urrogate Dtbromofluoromethane 920% 50-150 " <br />Surrogate 1 2-Dichloroethane-d4 900% 50-150 <br />MP -1 (W007366-03) Water Sampled 19 -Jul -0010 16 Received 19 -Jul -0014 00 <br />tert-Butyl alcohol <br />ND <br />100 ug/l 1 OG20015 19 -Jul -00 19 -Jul -00 EPA 8260A <br />Methyl tert-butyl ether <br />ND <br />20 " <br />Dl -isopropyl ether <br />ND <br />20 " <br />Ethvl tert-butyl ether <br />ND <br />20 " <br />tert-Amyl methvl ether <br />ND <br />20 <br />Surrogate Dibromofluoromethane <br />940% 50-150 <br />Surrogate 1,2-Dichloroethane-d4 <br />940% 50-150 <br />0equota Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br />custody document This analytical report must be reproduced in its entirety <br />Page 5 of 11 <br />0 <br />