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F ' 2 i S a f {I 819 Striker Avenue,Suite 8 Sequoia i Sacramento,CA 95834 -... (916)921-9660 AlitaIVICa.� FAX(916)921-0140 fwww,sequoialabs.coin { Delta Environmental Consultants(Cameron Park) Project: Arco 6100,Tracy,CA 3330 Cameron Park Dr.Ste 550 Project Number: NIA Reported: Cameron Park CA,95682Project Manager. jay Johnson 09/21/01 15:50 Total Purgeable Hydrocarbons and BTEX by DHS LUFT Sequoia Analytical- Sacramento Reporting Le Result Limit Units Dilution Batch Prepared Analyzed Method Notes B36-20(S102118-09).SoilSampled:09105101„10:15 Received:09107101,1,5:15 Forgeable Hydrocarbons 14 5.0 mg/kg 1 1090139 09/13/01 09/13/01 DHS LUFT Benzene 0.52 0.025 " Toluene 0.57 0.025 Ethylbenzene 0.21 0.025 " Xylenes(total) 0.78 0.025 " " Surrogate:a,a,a-Trilluorotoluene 110% 60-140 " B36-35 5109118-10 Soil Sam ied:0 !05101 10:50 Received:09/07/01 15:15 1 Purgeable Hydrocarbons 39 20 mg/kg 4 1090139 09/13/01 09/13/01 DHS LUFT Benzene 0.64 0.10 " Toluene 0.51 0.10 " Ethylbenzene 0.51 0.10 ii Xylenes(total) 3.6 0.10 " 4;. Surrogate:a,a,a-Trifluorotoluene 111% 60-140 " 11 " " # B36-64 S109118-11 oil Sam led:09/05/01 11:50 Received:09/07/01 15:15 + Purgeable Hydrocarbons 260 50 mg/kg 10 1090139 09/13/01 09/13/01 DHS LUFT Benzene 4.5 0.25 " " " Toluene 7.0 0.25 " Ethylbenzene 5.6 0.25 11 " Xylenes(total) IB 0.25 " 1 Surrogate:a,a,a-Trifluorotoluene 122% 60-140 B36-95(S109118-12)Soil Sampled:09105101.13:45 Received:09/07/01 15:15 I' Purgeable Hydrocarbons ND 5.0 mg/kg 1 1090139 09/13/01 09/13/01 DHS LUFT _. Benzene 0.48 0.025 " " Toluene 0.033 0.025 " " Ethylbenzene ND 0.025 " Xylenes(total) 0.054 0.025 " Surrogate:a,a,a-Trifluorotoluene 115% 60-140 1 11 " " i 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. i Page Page 7 of 24 I