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Sequoia <br />IwoAnalytical <br />Gettler Ryan, Inc -Dublin Project Cheaper <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 - Quality Control <br />Sequoia Analytical - Walnut Creek <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925)988-9600 <br />FAX (925) 988-9673 <br />www se4uoialabs corn <br />Reported <br />12 -Apr -00 11 36 <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch OD09001 - EPA 5030B [PIT] <br />Blank (OD09001-BLK2) <br />Prepared 09 -Apr -00 Analyzed 10 -Apr -00 <br />tert-Butyl alcohol <br />ND <br />100 <br />ug/1 <br />Methyl tert-butyl ether <br />ND <br />20 <br />" <br />Di-isopropvl ether <br />ND <br />20 <br />Ethyl tert-butyl ether <br />ND <br />20 <br />tert-Amyl methyl ether <br />ND <br />20 <br />Surrogate Dtbromofluoromethane <br />520 <br />500 104 50-150 <br />Surrogate 1 2-Drchloroethame-d4 <br />520 <br />500 104 50-150 <br />Blank (OD09001-BLK3) <br />Prepared & Analyzed 10 -Apr -00 <br />tent-ButylalcohoI <br />ND <br />loo <br />ug/l <br />Methyl tert-butyl ether <br />ND <br />20 <br />" <br />Di -isopropyl ether <br />ND <br />20 <br />thyl tert-butyl ether <br />ND <br />20 <br />rt -Amyl methyl ether <br />ND <br />20 <br />Surrogate Dibromofluoromethame <br />440 <br />Soo 880 50-150 <br />Surrogate 12 Dichloroethane-d4 <br />430 <br />Soo 900 50-150 <br />LCS (OD09001-BS2) <br />Prepared 09 -Apr -00 Analyzed 10 -Apr -00 <br />Methyl tent -butyl ether <br />I <br />410 <br />20 <br />u9/1 <br />500 820 '70-130 <br />Surrogate Dibromofluoromethane <br />510 <br />500 102 50-150 <br />Surrogate 1 2-Dichloroethane-d4 <br />Soo <br />500 100 50-150 <br />LCS (OD09001-BS3) <br />Prepared & Analyzed 10 -Apr -00 <br />Methyl tent -butyl ether <br />459 <br />20 <br />ug/1 <br />500 918 70-130 <br />Surrogate Dibromofluoromethane <br />510 <br />500 102 50-150 <br />Surrogate l 2-Dtchloroethane-d4 <br />510 <br />Soo 104 50-150 <br />Matrix Spike (OD09001-MSI) <br />Source W004029-07 <br />Prepared & Analyzed 09 -Apr -00 <br />Methyl ter -butyl ether <br />43 5 <br />20 <br />ug/1 <br />Soo ND 870 60-150 <br />Surrogate Dibromofluoromethoue <br />510 <br />500 102 50-150 <br />Surrogate 1 2-Dichloroethane-0 <br />I <br />520 <br />Soo 104 50-150 <br />Sequoia Analytical - Walnut Creek <br />The results in this report apply to the samples anahzed in accordance with the Chinn of <br />- <br />custody document This analytical report must be reproduced in its entirety <br />Page tO of 12 <br />