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404 N Wlget lane <br /> Sequoia Walnut Geek 094598 <br /> 4 (925)9888-9600 <br /> FAX(925)988-9673 <br /> 41 -,M Analytical ,wt sequoialabs com <br /> Gettler Ryan Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#d 2859 Reported: <br /> Dublin CA 94568 Project Manager Scott Polston 05-Jul-Ol 07 40 <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 Analyzed Method Notes <br /> VE2@1600(W106418-01)Air Sampled 19-Jun-01 1600 Received 21-Jun-01 16 16 <br /> Purgeable Hydrocarbons ND 10 mg/m'Air 0 2 I F22003 22-Jun-01 22-Jun-01 DHS LUFT <br /> Benzene ND 010 " <br /> Toluene ND 010 " <br /> Ethvlbenzene ND 010 " <br /> Xylenes(total) 044 0 10 CF-01 <br /> Methvi tert-butvl ether ND 050 " <br /> Surrogate a a a-Trtfluorotoluene 890% 70-130 T <br /> VE3Q0835(W106418-02)Air Sampled 20-Jun-01 08 35 Received 21-Jun-01 16 16 <br /> Purgeable Hydrocarbons 710 200 mg/ml Air 4 IF22003 22-Jun-01 22-Jun-01 DHS LUFT P-01 <br /> Benzene ND 2 0 " <br /> meToluene 5 5 2 0 " <br /> thylbenzene 90 2 0 <br /> Xylenes(total) 64 2 0 " <br /> Methyl tert-butyl ether ND 10 " <br /> Surrogate a a a-Trifluorotoluene 102% 70-130 <br /> 0 <br /> Sequoia Analyttcai- Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document 77us analytical report must be reproduced in its entirety <br /> Page 2 of 6 <br />