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Sequoia <br />� Analytical <br />Gettler Ryan, Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 <br />Dublin CA 94568 Project Manager Scott Polston <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />404 N WigetLane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925)988-9673 <br />www sequolalabs com <br />Repotted <br />19 -Apr -00 11 41 <br />Reporting <br />knalyte Result Limit Units Dilution Batch Prepared Analv2ed Method Note <br />EPf (07 56) (W0043044)1) Air Sampled <br />12 -Apr -00 07 56 <br />Receired <br />13 -Apr -00 17 10 <br />tert-Butyl alcohol <br />ND <br />200 mglm' Air t0 OD14016 14 -Apr 00 14 -Apr 00 EPA 8260A <br />Methyl tert-butyl ether <br />28 <br />so <br />Di -isopropyl ether <br />ND <br />5 0 <br />Ethyl tert-butyl ether <br />ND <br />50 <br />tert-Amyl methyl ether <br />ND <br />5 0 <br />Surrogate Dibromofluoromethane <br />102% <br />50-150 <br />Surrogate 1 1-Dielrloroethane-d4 <br />940% <br />50-150 <br />Inf (07 59) (W004304-02) Air Sampled <br />12 -Apr -00 07 59 <br />Received <br />13 -Apr -00 17 10 <br />ten -Butyl alcohol <br />ND <br />2000 mg/ml Air 100 OD14016 14 -Apr -00 14 -Apr 00 EPA 8260A <br />Methyl tert-butyl ether <br />13000 <br />50 <br />A01 <br />Di -isopropyl ether <br />ND <br />50 <br />Ethyl tent -butyl ether <br />650 <br />50 <br />" <br />JLrt-Amyl methyl ether <br />160 <br />50 <br />" <br />Srrogate Vibromofluoromethane 104% 50-150 " <br />Surrogate 1,2 Dichloroethane-d4 960% 50-150 ^ <br />Eff (15 15) (W004304-03) Air Sampled 12 -Apr -00 15 15 Received 13 -Apr -00 17 10 <br />Cert -Butyl alcohol ND 200 rnglm} Air 10 OD14016 14 -Apr -00 14 -Apr -00 EPA 8260A <br />Methyl tert-butyl ether 240 50 ~ ^ ^ <br />Di -isopropyl ether ND 50 ^ ^ ~ ^ <br />Ethyl tert-butyl ether 18 50 ~ ~ <br />tert-Amyi methyl ether 79 so <br />Surrogate Dibromofhroiromethane <br />Surrogate 1,1-Dichlonoethaned4 <br />wuVCd t1LAlytik di - YYdlllut LIGGK <br />104% 50-150 ~ <br />960% 50-150 ^ ^ ~ <br />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 enuren <br />Page 2 of 7 <br />