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QSequoia <br />� Analytical <br />404 N W Set lame <br />Walnut Geek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoialabs com <br />1kler Rvan Inc -Dublin <br />Project <br />Chevron <br />Benzene <br />477 Sierra Court Suite J <br />Project Number <br />Chevron SS#9-5775 <br />Reported <br />Dublin CA 94558 <br />Project Manager <br />Scott Polston <br />21 -Apr -00 10 43 <br />wi otal rurgeable tiydrocarbons (U6 -U[2) and B'I'Ex in Air (ppmv) by DHS LUFT <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />►nalyte Result Limit Units Dilution Batch Prepared Analvzed Method Note <br />INF (WO04445-01) Air Sampled 18 -Apr -00 07 44 Received 19 -Apr -00 16 05 <br />Purgeable H}drocarbons <br />2000 <br />24 ppm,, 1 OD14004 20 Apr -GO 20 Apr -00 DHS LUFT <br />Benzene <br />470 <br />0 016 " <br />Toluene <br />460 <br />0 013 <br />Ethylbenzene <br />28 <br />0 012 " <br />Xylenes (total) <br />120 <br />0 012 " <br />EFF (W004445-02) Air Sampled <br />18 -Apr -00 07 42 <br />Received 19 -Apr -00 16 05 <br />Purgeable Hydrocarbons <br />28 <br />24 ppmv I OD14004 20 -Apr -00 20 -Apr 00 DHS LUFT <br />Benzene <br />19 <br />0 015 " <br />Toluene <br />5 2 <br />0013 <br />Ethylbenzene <br />088 <br />0 012 " <br />Xylenes (total) <br />5 7 <br />0 012 ~ <br />• <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 entirety <br />0 <br />Page 3 of 8 <br />*• <br />