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Sequoia <br />IwoAnalytical <br />404 N WiSet Lane <br />Walnut Geek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequolalabs corn <br />a- ter Ryan lnc - Dublin Project Cheaper <br />6747 Sierra Court Suite ! Project Number Chevron ## 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 12 -Apr -00 11 36 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX in Air (ppmv) by DHS LUFT' <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />knalyte Result Limit Units Dilution Batch Prepared Analyzed Method Note! <br />INIi (09 53) (W004172-01) Air Sampled 06 -Apr -00 09 53 Received 07 -Apr -00 17 45 <br />Purgeable Hydrocarbons 6300 24 ppmv l OD10015 08 -Apr -00 08 -Apr -00 DHS LUFT <br />Benzene 1500 0 016 <br />Toluene 1800 0 013 <br />Ethylbenzene 100 0 012 " <br />Xylenes (total) 460 0 012 " <br />EFF (09 59) (W004172-02) Air Sampled 06 -Apr -00 09 59 Received 07 -Apr -00 17 45 <br />Purgeable Hydrocarbons <br />49 <br />24 ppmv I OD10015 08 Apr 00 08 Apr 00 DHS LUFT <br />Benzene <br />3 7 <br />0 016 " <br />Toluene <br />13 <br />0 013 " <br />Ethylbenzene <br />22 <br />0 012 " <br />Xylenes (total) <br />9 3 <br />0 012 " <br />INF (16 49) (W004172-03) Air <br />Sampled 06 -Apr -00 16 49 <br />Received 07 -Apr -00 17 45 <br />Purgeable Hydrocarbons <br />4800 <br />24 ppmv 1 OD10015 09 -Apr -00 08 -Apr -00 DHS LUFT <br />ene <br />1100 <br />0016 <br />ene <br />f <br />1200 <br />0 013 " <br />lb nzene <br />82 <br />0 012 <br />Xylenes (total) <br />360 <br />0 012 <br />EFF (16 47) (W004172-04) Air <br />Sampled 06 -Apr -0016 47 Received 07 -Apr -0017 45 <br />Purgeable Hydrocarbons <br />44 <br />2 4 ppmv 1 OD10015 08 -Apr -00 08 -Apr -00 DHS LUFT <br />Benzene <br />025 <br />0 016 " <br />Toluene <br />024 <br />0 013 <br />Ethylbenzene <br />0 074 <br />0 012 " <br />Xylenes (total) <br />065 <br />0 012 " <br />Sequoia Analvtical - Walnut Creek The results in IlaT report apply to the samples anolvied in accordance with the churn of <br />0 custody document This analytical report mast be reproduced in its entirety <br />Page 4 of 12 <br />:U <br />