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�1 Sequoia <br />Analytical <br />Gettler Rvan Inc -Dublin <br />6747 Sierra Court Suite 3 <br />Dublin CA 94568 <br />Project Cheaper <br />Project Number Chevron # 9-5775 <br />Project Manager Scott Polston <br />Volatile Organic Compounds by EPA Method 8260A - Quality Control <br />Sequoia Analytical - Walnut Creek <br />404 N %MSet lane <br />Walnut Creek C4 94598 <br />(9z5) 988-9600 <br />FAX (925) 988-9673 <br />www sequoialabs com <br />Reported <br />12 -Apr -00 11 36 <br />Reporting Spike Source %REC RPD <br />Analyte Result Limit Emits Level Result %REC Limits RPD Limit Notes <br />Batch OD09001 - EPA 5030B [PIT] <br />Matrix Spike Dup (OD09001-MSDI) Source W004029-07 Prepared & Analyzed 09 -Apr -00 <br />kiethyl tert-butyl ether 449 20 uefl 500 ND 898 60 150 3 17 25 <br />Surrogate Dibromofluoroinerhane .510 11500 102 50-150 <br />Surrogate 1 2-Dtchloroethane d4 500 500 100 50-150 <br />Batch OD10012 - EPA 5030B ]P/T] <br />Blank (OD10012-BLKI) Prepared 09 -Apr -00 Analyzed 10 -Apr -00 <br />tent -Butyl alcohol ND 20 mgims Air <br />Methyl tent-butvl ether ND 050 <br />Da -isopropyl ether ND 050 <br />Ethyl tert-butyl ether ND 050 <br />tert-Amyl methyl ether ND 050 <br />Surrogate Dibromofluoromethane <br />S20 <br />" 500 104 50-150 <br />Surrogate 1 I-Dichloroethane-d4 <br />S20 <br />500 104 50-150 <br />LCS (OD10012-BSI) <br />Prepared 09 -Apr -00 Analyzed 10 -Apr -00 <br />Methyl Cert -butyl ether <br />410 <br />0 50 mglm' Air 500 820 70-130 <br />Surrogate Dtbromafluoromethane <br />510 <br />500 102 50.150 <br />Surrogate 1 1-Dichloroeiham-dl <br />Sao <br />500 100 50-150 <br />LCS Dnp (OD10012-BSDI) Prepared 09 -Apr -00 Analyzed 10 -Apr -00 <br />Methyl Cert -butyl ether 461 0 50 mg/m- Air 500 922 70-130 117 25 <br />Sutrt►gate Dibmmoiluor+omelham 46.0 Soo 920 50-150 <br />Surrogate 11-Drchlor Ihww-d4 510 " Soo 104 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 must be reproduced in its entireo <br />Page II of 12 <br />