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Sequoia <br />404 N Wiget Lane <br />Walnut Creek C 9 <br />1 <br />a-- <br />(925) 988 8-96009600 <br />20 mg/ml Air 1 OE08023 08 -May -00 08 -May 00 EPA 8260A <br />FAX (925) 988-9673 <br />Analytical <br />� sequoialabs com <br />C'rettler Rvan Inc - Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron #{ 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 09 -May -00 11 21 <br />Volatile Organic Compounds by EPA Method 8260A <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note: <br />EFF 1 (08 05) (W005160-01) Air <br />Sampled 04-Mav-00 08 05 Received 05 -May -00 14 40 U-04 <br />tert-Butyl alcohol <br />ND <br />20 mg/ml Air 1 OE08023 08 -May -00 08 -May 00 EPA 8260A <br />Methyl tert-butyl ether <br />ND <br />050 <br />Di -isopropyl ether <br />ND <br />0 50 " <br />Ethyl tert-butyl ether <br />ND <br />050 <br />tert-Amyl methyl ether <br />ND <br />050 " <br />Surrogate Dibromofluoromethane <br />960% 50-150 " <br />Surrogate 12-Dichloroethane-d4 <br />960% 50-150 " <br />EFF 2 (15 10) (W005160-02) Air <br />Sampled 04 -May -00 15 10 Received 05-Mav-00 14 40 0-04 <br />ter% -Butyl alcohol <br />ND <br />20 rng/m' Air l OE08023 08 -May -00 08 Mav-00 EPA 8260A <br />Methyl tent -butyl ether <br />095 <br />050 " <br />Di -isopropyl ether <br />ND <br />050 " <br />Ethyl tert-butyl ether <br />ND <br />050 " <br />tert-Amyl methyl ether <br />ND <br />050 " <br />rrogaie Dibromofluoromethane <br />960% 50-150 <br />rrrogate 1 2-Dichloroethaned4 <br />980% 50-150 " <br />INF 1 (08 20) (W005160-03) Air <br />Sampled 04 -May -00 08 20 Received 05 -May -00 14 40 0-04 <br />tert-Butyl alcohol <br />ND <br />5000 mghn' Air 250 OE08023 08 -May -00 08 -May -00 EPA 8260A <br />Methyl tert-butyl ether <br />11000 <br />130 " <br />Di -isopropyl ether <br />ND <br />130 " » <br />Ethvl tert-butyl ether <br />ND <br />130 <br />tert-Amyl methyl ether <br />ND <br />130 " <br />Surrogate Dibromofluoromethane <br />100% 50-150 " <br />Surrogate 1,2 Dichloroethane-d4 <br />980% 50-150 " <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed IH accordance with the chat" of <br />0 custody document This analytical report must be reproduced in its entirety <br />Page 5 of 11 <br />- <br />