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I _S I SeySequoia819 Striker Avenue,Suite 8 6) Sacramento,CA 95834 (916)921-9600 AnalyfiCal7 FAX(916)921-0100 www.sequoialabs.com I I Cr lta Environmental Consultants(Cameron Park) Project: Arco 6100,Tracy,CA f 30 Cameron Park Dr.Ste 550 Project Number: N/AReported:meron Park CA,95682 Project Manager: ray Johnson 09/20/01 14:36 k Total Purgeable Hydrocarbons and BTEX by DHS LUFT Sequoia Analytical-Sacramento Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes I B3 -30 S10 123-01 oil Sampled:09/06/01 09:30 Received:09/10/01 14:00 j Purgeable Hydrocarbons 170 20 mg/kg 4 1090139 09/13/01 09/13/01 DHS LUFT Benzene 2.8 0.10 " f Toluene 4.3 0.10 i Ethylbenzene 3.4 0.10 Xylenes(total) 10 0.10 Surroizate:a.a.a-Trilluorotoluene 120% 60-140 B37-55(S109123-02)Soil Sampled:09/06/0110:15 Received: 09/10/01 14:00 Purgeable Hydrocarbons 1200 50 mg/kg . 10 1090139 09/13/01 09/13/01 DHS LUFT Benzene 13 0.25 " j ! Toluene 44 0.25 Ethylbenzene 19 0.25 I Xylenes(total) 64 0.25 " Surrogate:a,a,a-Trifluorotoluene 73.0% 60-140 I F 37-65(S109123-01)Soil Samnled:09106/0110:45 Received:09/10/01 14:00 iPurgeable Hydrocarbons 6.3 5.0 mg/kg 1 1090139 09/13/01 09/13/01 DHS LUFT F Benzene 1.0 0.025 z � r Toluene 0.32 0.025 Ethylbenzene 0.052 0.025 Xylenes(total) 0.80 0.025 Surrogate:a,a,a-Trifluorotoluene 99.9% 60-140 G � I B37-74 S109123-04 Soil Sampled:09/06/0111:20 Received:09110101 14:00 Purgeable Hydrocarbons ND 5.0 mg/kg 1 1090139 09/13/01 09/13/01 DHS.LUFT k Benzene 0.39 0.025 i Toluene 0.13 0.025 I Ethylbenzene ND 0.025 Xylenes(total) 0.27 0.025 Surrogate:a,a,a-Trifluorotoluene 111 % 60-140 I Y I I I l I � 1 l f I r Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain 4C; of custody document. This analytical report must be reproduced in its entirety. f` E 4 4 Page Page 2 of 9