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QSequoia <br />� Analytical <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925)988-9600 <br />FAX (925) 988-9673 <br />www sequoialabs com <br />Gettler R` an Inc -Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 09 -May -00 1121 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE by DHS LUFT <br />Sequoia Analytical - Walnut Creek <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Anahzed Method Note: <br />EFF 1 (08 05) (W005160-01) Air <br />Sampled 04 -May -00 08 05 Recen ed 05 -May -00 14 40 <br />Purgeable Hvdrocarbons <br />ND 10 mg/m, kir 02 OE08013 06 -May -00 06-MaN 00 DHS LOFT <br />Benzene <br />050 0 10 <br />Toluene <br />1 t 0 10 " <br />Ethylbenzene <br />022 0 10 " <br />Xylenes (total) <br />14 0 10 " <br />Methyl tert-butvl ether <br />ND 050 " <br />Surrogate a a a -Tri luorololuene <br />920% 70-1.30 " <br />EFF 2 (15 10) (W005160-02) Air <br />Sampled 04 -May -0015 10 Recen ed 05-Mav-00 14 40 P-01 <br />Purgeable Hydrocarbons <br />17 10 mg/ml Air 02 OE08013 06-Mav-00 06 -May 00 DHS LUFT <br />Benzene <br />0 75 0 10 <br />Toluene <br />16 010 " <br />Ethylbenzene <br />0 25 0 10 " <br />Xylenes (total) <br />20 010 <br />Methyl tent -butyl ether <br />083 0 50 <br />Surrogate a,a a-Trifluorotoluene 957% 70-130 " <br />M1 (08 20) (W005160-03) Air Sampled 04 -May -00 08 20 Received 05 -May -00 14 40 P-0 <br />Purgeable Hydrocarbons 8500 1000 mg/ml Air 20 OE08013 O&May-00 06 -May -00 DHS LUFT <br />Benzene 1800 10 " <br />Toluene 1700 10 <br />Ethylbenzene 83 10 <br />Xylenes (total) 370 10 <br />Methyl tert-butyl ether 8700 50 " <br />Surrogate a,a.a-Tri luorotoluene 182 % 70-130 S-04 <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the cha7n of <br />custody document This analytical report must be reproduced in its entirely <br />0 <br />Page 2 of 11 <br />