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Sequoia 819 Striker Avenue, Suite 8 Sacramento,e llUla CA 95834 S (i��q (916)921-9600 Anal tical www.seFAX quoialabs.com labs.c 00 qW Y www.sequoialabs.com Delta Environmental Consultants (Cameron Park) Project: Arco 6100, Tracy, CA 3330 Cameron Park Dr. Ste 550 Project Number: Arco 6100, Tracy, CA ]reported: Cameron Park CA, 95682 Project Manager: Jay Johnson 01/23/02 11:25 Total Purgeable Hydrocarbons and BTEX by DHS LUFT Sequoia Analytical - Sacramento Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Noce, L-1-6 (S201303-09) Soil Sampled: 01/18/02 12:30 Received: 01/18/0215:50 Purgeable Hydrocarbons 1.7 0.50 mg/kg 1 2010267 01/21/02 01/21/02 DHS LUFT HC -l2 Benzene ND 0.0050 " Toluene ND 0.0050 " Ethylbenzene 0.015 0.0050 " Xylenes (total) 0.030 0.0050 " Surrogate: a,a,a-Trifluorotoluene 89.5% 60-140 L-2-4 (S201303-10) Soil Sampled: 01/18/02 12:35 Received: 01/18/0215:50 Purgeable Hydrocarbons ND 0.50 mg/kg 1 2010267 01/21/02 01/21/02 DHS LUFT Benzene ND 0.0050 " Toluene ND 0.0050 " Ethylbenzene ND 0.0050 " Xylenes (total) ND 0.0050 " Surrogate: a,a,a-Trifluorotoluene 72.5% 60-140 " L-3-4 (S201303-11) Soil Sampled: 01/18/02 12:45 Received: 01/18/02 15:50 Purgeable Hydrocarbons ND 0.50 mg/kg 1 2010267 01/21/02 01/21/02 DHS LUFT Benzene ND 0.0050 " Toluene ND 0.0050 " Ethylbenzene ND 0.0050 " Xylenes (total) ND 0.0050 Surrogate: a,a,a-Trifluorotoluene 89.0% 60-140 " 11 SP -1 -1,-2.-3,-4 (Composite) (S201303-12) Soil SamDled: 01/18/02 13:00 Received: 01/18/02 15:50 Purgeable Hydrocarbons ND 0.50 mg/kg 1 2010267 01/21/02 01/21/02 DHS LUFT Benzene ND 0.0050 " Toluene ND 0.0050 " Ethylbenzene ND 0.0050 " Xylenes (total) ND 0.0050 " Surrogate: a,a,a-Trifluorotoluene 82.5% 60-140 " " " Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Page Page 4 of 17