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Sequoia <br />Analytical <br />Gettler Ryan Inc - Dublin <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 />404 N WlgetLane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoialabs com <br />Reported <br />09 -May -00 1121 <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note: <br />1NF 2 (15 20) (W005160-04) Air <br />Sampled 04 -May -00 15 20 Received 05 -May -00 14 40 U-04 <br />tert-Butvl alcohol <br />ND <br />1000 mg/ml Air 50 OE08023 08 May -00 08-Nfay-00 EPA 8260A <br />Methyl tert-butyl ether <br />4500 <br />130 250 " <br />Dt-isopropyl ether -- <br />ND <br />25 50 " <br />Ethyl Cert -butyl ether <br />290 <br />25 " <br />tent -Amyl methyl ether <br />88 <br />25 " <br />Surrogate Dihromofluoromethane <br />100% 50-150 " <br />Surrogate 12-Dichloroethanetl4 <br />100% 50-150 " <br />EX -1 (W005160-05) Water Sampled 04 -May -00 15 05 <br />Received 05 -May -00 14 40 <br />tert-Butyl alcohol <br />ND <br />500000 ugll 5000 OE05016 08 -May -00 08 May 00 EPA 8260A <br />Methyl tent -butyl ether <br />530000 <br />10000 " <br />Di -isopropyl ether <br />ND <br />10000 " <br />Ethyl tert-butyl ether <br />12000 <br />10000 " <br />tent -Amyl methyl ether <br />ND <br />10000 " <br />Surrogate Dibromofluoromethane <br />940% 50-150 " <br />Surrogate 12-Dichloraethane-d4 <br />920% 50-150 • <br />Sequoia 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 mast be reproduced in its entirety <br />Page 6 of 11 <br />:*. <br />