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885 Jarvis Dr <br /> Sequoia uoia McrpnHi8,CA95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www.scquoialabs.can <br /> S Corporation[l] Project: ARCO#548,Stockton,Ca MLL0882 <br /> 870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO 4548,Stockton,CA Reported: <br /> Sacramento CA,95833 Project Manager: Vern Elarth 01/10/03 15:47 <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air (ppmv) by DHS LUFT <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> INF Total Air(MLL0882-01)Air Sampled. 12/26/02 12:00 Received: 12/26/02 14:35 _ <br /> Purgeable Hydrocarbons 15 14 ppmv 5 3010119 01/08/03 01/08/03 DHS LUFT <br /> Benzene ND 0.080 " <br /> Toluene ND 0.065 " <br /> Ethylbenzene ND 0.060 " <br /> Xylenes(total) ND 0.060 " <br /> Methyl tert-butyl ether ND 0.70 " <br /> Surrogate:a,a,a-Trii luorotoluene 109% 60-140 11 " " <br /> INF Cat Air LL0882-02 Air Sampled:12/26/02 11:50 Received:12/26/02 14:35 <br /> Purgeable Hydrocarbons 15 7.0 ppmv 2.5 3010119 01/08/03 01/08/03 DHS LUFT <br /> Benzene ND 0.040 " <br /> Toluene ND 0.032 <br /> Ethylbenzene ND 0.030 " <br /> Xylenes(total) ND 0.030 " <br /> Methyl tent-butyl ether ND 0.35 " <br /> Surrogate:a,a,a-Tris luorotoluene 116% 60-140 " " " " <br /> AFF Air(MLL0882-03)Air Sampled:12/26/02 I1.45 Received: 12/26/02 14:35 <br /> "Purgeable Hydrocarbons ND 2.8 ppmv 1 3010119 01/08/03 01/08/03 DHS LUFT <br /> Benzene ND 0.016 <br /> Toluene ND 0.013 " <br /> Ethylbenzene ND 0.012 j <br /> Xylenes(total) ND 0.012 " <br /> Methyl tert-butyl ether ND 0.14 " <br /> Surrogate:a,a,a-Tris luorotoluene 90% 60-140 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document.Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. <br /> 4of8 <br />