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4DSequoia <br />qw Analytical <br />819 Striker Avenue, Suite 8 <br />Sacramento, CA 95834 <br />(916) 921-9600 <br />FAX (916) 921-0100 <br />www.sequoialabs.com <br />Delta Environmental Consultants (Cameron Park) Project: Arco 6100, Tracy, CA <br />3330 Cameron Park Dr. Ste 550 Project Number: Arco 6100, Tracy, CA Reported: <br />Cameron Park CA, 95682 Project Manager. Jay Johnson 01/25/02 13:34 <br />Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT <br />Sequoia Analytical - Sacramento <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br />Waste Composite (5201350-01) Soil Sampled: 01/23/02 13:00 Received: 01/23/02 16:15 <br />Purgeable Hydrocarbons 290 20 mg/kg 4 2010315 01/24/02 01/24/02 DHS LILJFT <br />Benzene ND 0.20 " <br />Toluene 2.1 0.20 " <br />Ethylbenzene 3.0 0.20 " <br />Xylenes (total) 16 0.20 " <br />Methyl tert-butyl ether 4.0 1.0 " <br />Surrogate: a,a,a-Trilluorotoluene 91.7% 60-140 " <br />Sequoia Analytical - Sacramento <br />The results in this report apply to the samples analyzed in accordance with the chain <br />of custody document. This analytical report must be reproduced in its entirety. <br />Page Page 2 of 6 <br />