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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical <br /> FAX(916)921-0100 <br /> �.(.�1 wwwsequoialaUs.com <br /> Delta Environmental Consultants(Cameron Park) Project: ARCO 548, Stockton, CA <br /> 3330 Cameron Park Dr. Project Number: NIA Reported: <br /> Cameron Park CA;95682 Project Manager: Jay Johnson 03/16/01 10:48 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE in Air by DHS LUFT- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %RBC Limits RPD Limit Notes <br /> Batch 1030114-EPA 5030B(PIT) <br /> LCS(1030114-BS1) Prepared&Analyzed:03/08/01 <br /> Benzene 1.92 0.0500 mg/ml Air 2.00 96.0 70-130 <br /> Toluene 1.99 0.0500 2.00 99.5 70-130 <br /> Ethylbenzene 2.03 0.0500 2.00 101 70-130 <br /> Xylenes(total) 6.03 0.0500 6.00 101 70-130 <br /> Methyl tert-butyl ether 2.15 0.500 2.00 l08 70-130 <br /> Surrogate:a,a,a-Trifluorotolvene 1.86 2.00 93.0 60-140 <br /> LCS Dup(1030114-BSD1) Prepared&Analyzed:03/08/01 <br /> Benzene 1.97 0.0500 mg/ml Air 2.00 98.5 70-130 2.57 25 <br /> Toluene 2.02 0.0500 2.00 101 70-130 1.50 25 <br /> Ethylbenzene 2.06 0.0500 2.00 103 70-130 1.47 25 <br /> Xylenes(total) 6.12 0.0500 6.00 102 70-130 1.48 25 <br /> IMI tert-butyl ether 2.17 0.500 2.00 109 70-130 0.926 25 <br /> 971741te:a,a,a-Triuorotoluene 1.83 2.00 91.5 60-140 <br /> i <br /> Uoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Pale 5 of 7 <br />