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Sequoia <br />� Analytical <br />404 N WigetLane <br />Walnut Creek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequoialabs corn <br />Gettler Ryan, Inc -Dublin Project Cheaper <br />6747 Sierra Court Suite J Project Number Chevron 4 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 Creel <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analvzed Method Notes <br />INF (09 53) (WO04172-01) Air Sampled 06 -Apr -00 09 53 Relelved 07 -Apr -00 17 45 <br />Purgeable Hydrocarbons <br />6300 <br />24 ppmv 1 OD10015 <br />08 -Apr -00 08 -Apr 00 DHS LUFT <br />Benzene <br />1500 <br />0 016 " <br />Toluene <br />1800 <br />0 013 " <br />Ethylbenzene <br />100 <br />0 012 <br />Xylenes (total) <br />460 <br />0 012 <br />" <br />EFF (09 59) (W004172-02) Air <br />Sampled 06 -Apr -00 09 59 <br />Received 07 -Apr -00 17 45 <br />Purgeable Hydrocarbons <br />49 <br />2 4 ppmv 1 OD10015 <br />08 -Apr 00 08 -Apr -00 DHS LUFT <br />Benzene <br />37 <br />0 016 <br />^ <br />Toluene <br />13 <br />0 013 <br />Ethylbenzene <br />22 <br />0 012 <br />^ <br />Xylenes (total) <br />93 <br />0 012 <br />INF (16 49) (W004172-03) Air <br />Sampled 06 -Apr -0016 49 <br />Received 07 -Apr -00 17 45 <br />Purgeable Hydrocarbons <br />4800 <br />24 ppmv 1 OD10015 <br />08 -Apr -00 08 -Apr -00 DHS LUFT <br />1100 <br />0 016 <br />10nzene <br />aluene <br />1200 <br />0 013 <br />Ethylbenzene <br />82 <br />0 012 <br />^ " <br />Xylenes (total) <br />360 <br />0 012 <br />EFF (16 47) (W004172-04) Air <br />Sampled 06 -Apr -00 16 47 <br />Received 07 -Apr -00 17 45 <br />Purgeable Hydrocarbons <br />4 4 <br />24 ppmv 1 OD10015 <br />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 IHthir report apply to the samples anahmed in accordance with the choilr of <br />fAcustody document This analytical report must be reproduced in its entirety <br />Page 4 of 12 <br />