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1 Sequoia <br />Analytical <br />Gettler Ryan, Inc -Dublin <br />6747 Sierra Court Suite J <br />Dublui CA 94568 <br />Project Chevron <br />Project Number Chevron # 9-5775 <br />Project Manager Scott Polston <br />404 N Wlget Lane <br />Walnut Crede, CA 94598 <br />(925) 988-9600 <br />FAX (9Z5) 988-9673 <br />www sequoUdabs com <br />Reported <br />25 -Jul -0010 44 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX in Air by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reportuig Spike Source %REC RPD <br />Analvte Result Lumt Units Level Result %REC Limits RPD Limit Notes <br />Batch 0G05016 -EPA 5030E [P/fl <br />Prepared & Analyzed 03 -Jul -00 <br />LCS (OG05016-BSI) <br />Prepared & Analyzed 03 -Jul -00 <br />Blank (OG05016-BLKI) <br />170 <br />0 010 <br />mg/m' Au' 200 850 65-120 <br />Purgeable Hvdrocarbans <br />ND <br />2 0 mgW Au <br />200 900 65-120 <br />Beruene <br />ND <br />0 010 <br />100 105 65-120 <br />Toluene <br />ND <br />0 010 <br />12.0 992 65-120 <br />Ethvlbenzene <br />ND <br />0 010 <br />600 970 65-120 <br />Xylenes (total) <br />ND <br />0 010 <br />600 873 70.130 <br />566 <br />600 943 70-130 <br />Surrogate a a a-Trrfluorotoluene <br />Prepared & Analvzed 07 -Jul -00 <br />Blank (OG05016-BLK2) <br />Purgeable Hydrocarbons <br />ND <br />20 mg/rn' Air <br />Benzene <br />ND <br />0 010 " <br />Toluene <br />ND <br />0 010 " <br />Aftlnc <br />-." <br />ND <br />0 010 " <br />I. (total) <br />ylen <br />ND <br />0 010 <br />Sumogaie aaa-Trtfluororoluene <br />568 <br />600 947 70.130 <br />- V4lalallt Creek The results in tins report apply to the simples airaiyud in accordance with the chain of <br />custody document. Thrs arudyecal report must be reproduced In tts entrrety <br />Page 14 of 25 <br />Prepared & Analyzed 03 -Jul -00 <br />LCS (OG05016-BSI) <br />170 <br />0 010 <br />mg/m' Au' 200 850 65-120 <br />Benztue <br />ISO <br />0 010 <br />200 900 65-120 <br />Toluene <br />210 <br />0 010 <br />100 105 65-120 <br />EthyMcnzene <br />119 <br />0 010 <br />12.0 992 65-120 <br />Xyknes (toW) <br />582 <br />0 010 <br />600 970 65-120 <br />Xy1mm (total) <br />514 <br />600 873 70.130 <br />516 <br />600 877 70-130 <br />Stanogate as a-Ttrfluora trhtene <br />- V4lalallt Creek The results in tins report apply to the simples airaiyud in accordance with the chain of <br />custody document. Thrs arudyecal report must be reproduced In tts entrrety <br />Page 14 of 25 <br />Prepared & Analyzed. 07 -Jul -00 <br />LCS (0005016-BS2) <br />330 <br />0 010 <br />mg/dl' Air 400 325 65-110 <br />Benzene <br />356 <br />0 010 <br />400 890 65-120 <br />Toluene <br />428 <br />0 010 <br />400 107 65-120 <br />Ethylbenzene <br />119 <br />0 010 <br />12.0 992 65-120 <br />Xyknes (toW) <br />Srmngale a a a-Trtfhrorotohiene <br />514 <br />600 873 70.130 <br />- V4lalallt Creek The results in tins report apply to the simples airaiyud in accordance with the chain of <br />custody document. Thrs arudyecal report must be reproduced In tts entrrety <br />Page 14 of 25 <br />