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1. (D Sequoia <br />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 01/24/02 17:22 <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 Note <br />SPT -I.-2.-3.4 (Composite) (S201328-01) Soil <br />Sampled: 01/22/0210:45 Received: 01/22/02 13:29 <br />Purgeable Hydrocarbons <br />ND <br />0.50 mg/kg 1 2010298 01/23/02 01/23/02 DHS LUFT <br />Benzene <br />ND <br />0.0050 <br />Toluene <br />ND <br />0.0050 " <br />Ethylbenzene <br />ND <br />0.0050 " <br />Xylenes (total) <br />ND <br />0.0050 " <br />Methyl tert-butyl ether <br />ND <br />0.0050 " <br />Surrogate: a,a,a-Trifluorotoluene <br />66.5% 60-140 <br />SPT -5.-6.-7.-8 (Composite) (S201328-02) Soil <br />Sampled: 01/22/02 10:50 Received: 01/22/02 13:29 <br />Purgeable Hydrocarbons <br />ND <br />0.50 mg/kg 1 2010298 01/23/02 01/23/02 DHS LUFT <br />Benzene <br />ND <br />0.0050 " <br />Toluene <br />ND <br />0.0050 " <br />Ethylbenzene <br />ND <br />0.0050 " <br />Xylenes (total) <br />ND <br />0.0050 " <br />Methyl tert-butyl ether <br />ND <br />0.0050 " <br />Surroiate: a,a,a-Trifluorotoluene <br />71.0% 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 />