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819 Striker Avenue, Suite 8 <br />Sequoia Sacramento,9 <br />5834 <br />(916)) 921-9600 <br />�' Analytical 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 01/28/02 15:54 <br />Total Purgeable Hydrocarbons and BTEX by DHS LUFT <br />Sequoia Analytical - Sacramento <br />Reporting <br />Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br />D3-6 (S201351-01) Soil SamDled: 01/23/02 14:25 Received: 01/23/02 16:15 <br />Purgeable Hydrocarbons 640 50 mg/kg 10 2010315 01/24/02 01/24/02 DHS LUFT <br />Benzene 2.6 0.50 " <br />Toluene 16 0.50 " <br />Ethylbenzene 13 0.50 " <br />Xylenes (total) 64 0.50 " <br />Surrogate: a,a.a-Trifluorotoluene 93.3% 60-140 <br />D2-6 (S201351-02) Soil Samaled: 01/23/02 14:30 Received: 01/23/02 16:15 <br />Purgeable Hydrocarbons 610 50 mg/kg 10 2010315 01/24/02 01/24/02 DHS LUFT <br />Benzene 1.8 0.50 " <br />Toluene 11 0.50 " <br />Ethylbenzene 12 0.50 " <br />Xylenes (total) 63 0.50 " <br />Surrogate: a,a,a-Trifluorotoluene 98.1% 60-140 <br />D6-6 (S201351-03) Soil Sampled: 01/23/02 14:35 Received: 01/23/02 16:15 <br />Purgeable Hydrocarbons 180 50 mg/kg 10 2010315 01/24/02 01/24/02 DHS LUFT <br />Benzene 2.1 0.50 " <br />Toluene 5.1 0.50 " <br />Ethylbenzene 4.6 0.50 " <br />Xylenes (total) 21 0.50 " <br />Surrogate: a,a,a-Trifluorotoluene 87.3% 60-140 <br />D7-6 (5201351-04) Soil Sampled: 01/23/02 14:35 Received: 01/23/02 16:15 <br />Purgeable Hydrocarbons 1300 50 mg/kg 10 2010315 01/24/02 01/24/02 DHS LUFT <br />Benzene 2.9 0.50 " <br />Toluene 20 0.50 " <br />Ethylbenzene 20 0.50 " <br />Xylenes (total) 120 0.50 " <br />Surrogate: a,a,a-Trifluorotoluene 80.7% 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 7 <br />