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819 Striker Avenue, Suite 8 <br />Sequoia Sacramento,95834 <br />(916)) 9 921-96009600 <br />2 1 <br />Analytical FAX (916) labs.c00 <br />Y wwwsequoialabs.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 Manages Jay Johnson 01/23/02 11:25 <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 />D-5-6 (S201303-05) Soil Sampled: 01/18/02 11:55 Received: 01/18/02 15:50 <br />Purgeable Hydrocarbons 48 5.0 mg/kg 1 2010265 01/21/02 01/21/02 DHS LUFT <br />Benzene 0.78 0.025 " <br />Toluene 1.0 0.025 " <br />Ethylbenzene 1.2 0.025 " <br />Xylenes (total) 5.8 0.025 <br />Surrogate: a,a,a-Tris luorotoluene 100% 60-140 " <br />D-6-4 (S201303-06) Soil Sampled: 01/18/02 12:00 Received: 01/18/02 15:50 <br />Purgeable Hydrocarbons 1500 50 mg/kg 10 2010265 01/21/02 01/21/02 DHS LUFT <br />Benzene 2.0 0.25 " <br />Toluene 21 0.25 " <br />Ethylbenzene 22 0.25 " <br />Xylenes (total) 130 0.25 " <br />Surrogate: a,a,a-TriJluorotoluene 87.9% 60-140 <br />D-7-3.5 (S201303-07) Soil Sampled: 01/18/02 12:10 Received: 01/18/02 15:50 <br />Purgeable Hydrocarbons 870 20 mg/kg 4 2010265 01/21/02 01/21/02 DHS LUFT <br />Benzene 1.2 0.10 " <br />Toluene 8.6 0.10 " <br />Ethylbenzene 8.5 0.10 " <br />Xylenes (total) 55 0.10 " <br />Surrogate: a,a,a-Trifluorotoluene 96.4% 60-140 11" <br />D-8-3.5 (5201303-08) Soil Sampled: 01/18/02 12:20 Received: 01/18/02 15:50 <br />Purgeable Hydrocarbons 2200 100 mg/kg 20 2010265 01/21/02 01/22/02 DHS LUFT <br />Benzene 4.3 0.50 " <br />Toluene 37 0.50 " <br />Ethylbenzene 29 0.50 " <br />Xylenes (total) 180 0.50 " <br />Surrogate: a,a,a-Tris luorotoluene 101 % 60-140 <br />Sequoia Analytical - Sacramento <br />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 />Page Page 3 of 17 <br />