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Sequoia <br />� Analytical <br />Gettler Ryan, /tic - Dublin Project Chevron <br />6-747 Sierra Court Suite J Project Number Chevron 4 9-5775 <br />Dublin CA 94568 Project Manager Scott Polston <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX in Air by DHS LUFT <br />Sequoia Analytical - Walnut Creek <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925) 988-96W <br />FAX (925) 988-9673 <br />www sequoialahs com <br />Reported <br />18 -Apr -00 11 39 <br />Reporting <br />Analvte Result Limit Units Dilution Batch Prepared Analvzed Method Note; <br />Efl (07 56) (W004304-01) Air Sampled <br />12 -Apr -00 07 56 <br />Received <br />13 -Apr -00 17 10 x --UA <br />Purgeable Hydrocarbons <br />1100 <br />20 mg/m' <br />Air 2 OD14004 14 -Apr -00 14 -Apr -00 DHS LUFT <br />Benzene <br />110 <br />010 <br />010 " <br />Toluene <br />330 <br />010 <br />" <br />Ethylbenzene <br />55 <br />0 10 <br />" <br />Xylenes (total) <br />260 <br />0 t0 <br />" <br />Surrogate a a a-Tnfluorotoluene <br />2600 <br />116 % <br />70-130 " <br />Inf (07 59) (W004304-02) Air Sampled <br />12 -Apr -00 07 59 <br />Received <br />13 -Apr -00 17 10 P-02 <br />Purgeable Hydrocarbons <br />15000 <br />200 mglm' <br />Air 20 OD14004 14 -Apr -00 14 -Apr -00 DHS LUFT <br />Benzene <br />2800 <br />10 <br />" <br />Toluene <br />3300 <br />10 <br />" <br />Ethvlbenzene <br />230 <br />10 <br />" <br />Xylenes (total) <br />1000 <br />10 <br />" <br />Surrogate a a a-Tnfluorotoluene <br />218% <br />70-130 SO4 <br />Eft (15 15) (Wo04304-03) Air Sampled <br />12 -Apr -0015 15 <br />Received <br />13 -Apr -0017 10 P-02 <br />Purgeable Hydrocarbons <br />2700 <br />20 mghn' Air 2 OD14004 14 -Apr -00 14 -Apr 00 DHS LUFT <br />Benzene <br />460 <br />010 <br />Toluene <br />1100 <br />010 " <br />Ethylbenzene <br />180 <br />010 " <br />Xylenes (total) <br />830 <br />010 " <br />Surrogate a a,a-Tnfluorotoluene <br />195 % 70-130 S-04 <br />Inf (15 25) (W004304-04) Air Sampled <br />12 -Apr -0015 25 <br />Received 13 -Apr -00 17 10 P-02 <br />Purgeable Hydrocarbons <br />13000 <br />200 mg/ml Air 20 OD14004 14 -Apr -00 14 -Apr -00 DHS LUFT <br />Benzene <br />2600 <br />10 " <br />Toluene <br />2700 <br />10 " <br />Ethylbenzene <br />220 <br />10 " <br />Xylenes (total) <br />1100 <br />10 <br />Surrogate a a a-Trifluorotoluene 190% 70-130 S-04 <br />Sequoia Analytical - Walnut Creek rhe results in this report apply to the samples analyzed in accordance with the churn of <br />custody document This analytical report mast be reproduced in Ot entirety <br />Page 3 of 22 <br />*. <br />