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Sequoia <br />404 N Wlget lane <br />WalnutCreek C94598A <br />4 <br />(925) 988 -9G008 -96M <br />,-!D— <br />FAX (925) 988-9673 <br />Analytical,wiseclu°lalabsAIIIIIINk <br />ug/i <br />Total Xylenes <br />Gettler Ryan lnc -Dublin ProjeLt Chevron <br />6747 Sierra Court Suite 3 Project Number Chevron # 9-5775 Reported <br />Dublin CA, 94568 Project Manager Scott Polston 25 -Jul -00 10 44 <br />Volatile Organic Compounds by EPA Method 8260A - Quality Control <br />Sequoia Analytical - Walnut Creep <br />Reporting Spike Source %REC RPD <br />Waiyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 0G08002 - EPA 5030B [P/Tl <br />Blank (OG08002-BLK2) <br />Prepared & Analyzed 08 -Jul -00 <br />Ethylbenzene <br />ND <br />20 <br />ug/i <br />Total Xylenes <br />ND <br />20 <br />" <br />1,1 1 2 -Tetrachloroethane <br />ND <br />20 <br />Styrene <br />ND <br />2 0 <br />Bromoform <br />ND <br />20 <br />" <br />Isopropylbenzene <br />ND <br />20 <br />" <br />1 1,2,2 -Tetrachloroethane <br />ND <br />20 <br />" <br />Bromobenzene <br />ND <br />20 <br />n-Propylbenzene <br />ND <br />20 <br />" <br />1,2 3-Tnchloropropane <br />ND <br />20 <br />" <br />2 Chlorotoluene <br />ND <br />2 0 <br />1,3 5-Tnrnethylbenzene <br />ND <br />20 <br />" <br />4-Chlorotoluene <br />ND <br />20 <br />tert-Butylbenzene <br />ND <br />20 <br />" <br />12 4-Tnmethylbenzene <br />ND <br />20 <br />" <br />sec-Butylbenzene <br />ND <br />20 <br />" <br />p-Isopropyltoluene <br />ND <br />20 <br />1,3 -Dichlorobenzene <br />ND <br />20 <br />" <br />1,4 -Dichlorobenzene <br />ND <br />2 0 <br />" <br />n Butylbenzene <br />ND <br />2 0 <br />1,2 -Dichlorobenzene <br />ND <br />2 0 <br />1,2-Dibromo-3-chloropropane <br />ND <br />50 <br />" <br />1,2 4-Tnchlorobenzene <br />ND <br />2 0 <br />Naphthalene <br />ND <br />10 <br />" <br />He=hlorobutadiene <br />ND <br />10 <br />" <br />1,2,3-Tnchlorobenzene <br />ND <br />20 <br />" <br />Surrogate Dibromofluoromethane <br />520 <br />500 104 50-150 <br />Surrogate 1 2-Dxhloroethane-d4 <br />530 <br />500 106 50-150 <br />Surrogate Toluene -d8 <br />490 <br />500 980 50-150 <br />Surrogate 4-Bromofluorobemene <br />500 <br />500 100 50-150 <br />equoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain <br />custody document This analytical report must be reproduced in its entirt <br />"M <br />• <br />Page 21 of 25 <br />