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885 Jarvis Dr <br /> a— ) Sequoia MQgpn Hifl,CA 95037 <br /> (408)776-9600 <br /> AW Analytical FAX(409)782-6308 <br /> www mquoialabs can <br /> URS Corporation[I] Project ARCO#2093,Tracy,CA MLL0596 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number ARCO#2093,Tracy,CA Reported <br /> Sacramento CA,95833 Project Manager Vern Elarth 12/20/02 1142 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> SP 1-4 Composite MLL0596-0I Soil Sampled 12/18/02 11 50 Received 12/18/02 10 35 <br /> Purgeable Hydrocarbons 36 25 mg/kg 1 2120309 12/18/02 12/18/02 DHS LUFT H <br /> Benzene 0 Il 0 025 " <br /> Toluene 0 12 0 025 " <br /> Ethylbenzene 0 41 0 025 " <br /> Xylenes(total) 2 7 0 025 <br /> Surrogate a,a a-Triflucrotoluene 140910 60-140 " <br /> SP 5-8 Composite MLL0596-02 Soil Sampled 12/18/02 12 00 Received 12/18/02 10 35 <br /> Purgeable Hydrocarbons ND 050 mg/kg 1 2120309 12/18/02 12/19/02 DHS LUFT <br /> Benzene ND 00050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Surrogate a a a-Trifluorotoluene 67% 60-140 " <br /> SP 9-12 Composite MLL0596-03 Soil Sampled 12/18/02 12 15 Received 12/18/02 10 35 <br /> opurgeable Hydrocarbons ND 050 mg/kg 1 2120309 12/18/02 12/19/02 DDS LUFT <br /> enzene ND 00050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 <br /> Xylenes(total) ND 00050 " <br /> Surrogate a a a-Trifluorololuene 70% 60-140 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> 0 This analytical report must be reproduced in its entirety <br /> 3 of 6 <br />