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865 Jarvis Dr <br /> SequoiaMcrgmHi➢,CA 95037 <br /> ' (408)7709600 <br /> Analytical FAX(408)782-6308 <br /> www.wquoialabs.can <br /> URS Corporation[1] Project: ARCO#548,Stockton,Ca MMA0516 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO#548,Stockton,CA Reported: <br /> Sacrarrrento CA,95833 Project Manager: Vern Elarth 01/27/03 14:40 <br /> Total Purgeable Hydrocarbons,BTEX and MTBE in Air by DHS LUFT <br /> Sequoia Analytical- Sacramento <br /> Reporting - <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> INF Total Air 0516-01 Air Sam led:01/22/03 10:20 Received:01/22/0316:25 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air 1 3010437 01/24/03 01/24/03 DHS LUFr <br /> Benzene ND 0.10 <br /> Toluene ND 0.10 " <br /> EthyIbenzene ND 0.10 <br /> Xylenes(total) ND 0.10 " Q-28 <br /> Methyl tert-butyl ether ND 0.50 " <br /> Surrogate:a,a,a-Triuorotoluene 73% 60-140 " <br /> INF Cat Air 0516-02 Air Sampled:01/22/03 10:10 Received:0112210316:25 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air 1 3010437 01/24/03 01/24/03 DHS LUFT <br /> Benzene ND 0.10 " 11 " <br /> Toluene ND 0.10 <br /> Ethylbenzene ND 0.10 <br /> Xylenes(total) ND 0.10 " " Q-28 <br /> Methyl tent-butyl ether ND 0.50 " <br /> Wurrogate:a,a,a-Trifluorotoluene 65% 60-140 " <br /> EFF Air(MMA0516-03)Air Sampled:01/22/03 10:00 Received:01122/0316:25 _ <br /> Purgeable Hydrocarbons ND 10 mg/ml Air 1 3010437 01/24/03 01/24/03 DHS LUFT <br /> Benzene ND 0.10 <br /> Toluene ND 0.10 <br /> Ethylbenzene ND 0.10 <br /> Xylenes(total) ND 0.10 <br /> Methyl tert-butyl ether ND 0.50 " <br /> Surrogate:a,a,a-Tris luorotoluene 67% 60-140 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> to custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> 3 of 7 <br />