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I j� Sequoia <br />qco Analytical <br />404 N Wlget Lane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoialabs corn <br />Gettler Ryan, Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron SS#9-5775 Reported <br />Dublin CA, 94568 Project Manager Scott Polston 25 -Apr -00 17 37 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX in Air (pprnv) by DHS LUFT <br />Sequoia Analytical - Walnut Creep <br />Reporting <br />Analvte Result Limit Units Dilution Batch Prepared Analyzed Method Note; <br />INF (W004472-01) Air Sampled <br />19 -Apr -0015 20 <br />Received 20 -Apr -0015 20 <br />Purgeable Hydrocarbons <br />3400 <br />24 pprnv 1 OD21004 21 -Apr -00 21 -Apr -00 DHS LUFT <br />Benzene <br />940 <br />0 016 <br />Toluene <br />1000 <br />0 013 <br />Ethylbenzene <br />84 <br />0 012 " <br />Xylenes (total) <br />390 <br />0 012 <br />EFF (W004472-02) Air Sampled <br />19 -Apr -00 15 25 <br />Received 20 -Apr -00 15 20 <br />P'urgeable Hydrocarbons <br />540 <br />24 ppmv I OD21004 21 Apr -00 2l -Apr -00 DHS LUFT <br />Benzene <br />130 <br />0 016 <br />Toluene <br />250 <br />0 013 <br />Ethylbenzene <br />32 <br />0 012 " <br />Xylenes (total) <br />160 <br />0 012 <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyaed in accordance with the churn of <br />custody documern This analytical report must be reproduced in its entirety <br />Page 4 of 10 <br />:A. <br />