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404 N.Wiget Lane <br /> Sequoia Walnut Creels,CA 94598 <br /> / (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> Pinnacle/IT Project: Arco <br /> 2201 Broadway Suite 101 Project Number: Arco#6080,Lathrop Reported: <br /> Oakland CA,94612 Project Manager: Joel Coffman 14-Sep-99 10:28 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT <br /> Sequoia Analytical -Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> D-1 (W909150-01)Soil Sampled: 08-Sep-99 10:10 Received: 08-Sep-99 14:30 P-01,S-01 <br /> Purgeable Hydrocarbons 6700 1000 mg/kg 20000 9I09015 09-Sep-99 09-Sep-99 DHS LUFT <br /> Benzene <br /> ND 5.0 " " <br /> 11 11 11„ <br /> Toluene 47 5.0 „ <br /> Ethylbenzene 71 5.0 <br /> Xylenes(total) 710 5.0 ” <br /> Surrogate:a,a,a-Trifluorotoluene % 40-140 " <br /> D-2(W909150-02)Soil Sampled:08-Sep-9910:20 Received:08-Sep-99 14:30 P-01,S-01 <br /> Purgeable Hydrocarbons 3400 500 mg/kg 10000 9109016 09-Sep-99 09-Sep-99 DHS LUFT <br /> ND 2.5 " " 11 11Benzene „ <br /> Toluene 4.5 2.5 " <br /> Ethylbenzene 14 2.5 <br /> Xylenes(total) <br /> 170 2.5 " <br /> Surrogate:a,a,a-Trifluorotoluene % 40-140 " <br /> D-3(W909150-03)Soil Sampled:08-Sep-99 10:30 Received: 08-Sep-99 14:30 <br /> Purgeable Hydrocarbons ND 1.0 mg/kg 20 9109015 09-Sep-99 09-Sep-99 DHS LUFT <br /> Benzene ND 0.0050 " <br /> Toluene ND 0.0050 " <br /> Ethylbenzene ND 0.0050 " <br /> Xylenes(total) ND 0.0050 <br /> Surrogate:a,a,a-Trifluorotoluene <br /> 102% 40-140 <br /> D4(W909150-04)Soil Sampled:08-Sep-99 10:40 Received:08-Sep-99 14:30 P-II1,S Ill <br /> Purgeable Hydrocarbons 60 50 mg/kg 1000 9I09015 09-Sep-99 09-Sep-99 DHS LUFT <br /> Benzene ND 0.25 <br /> Toluene 0.35 0.25 " <br /> Ethylbenzene 0.35 0.25 " <br /> Xylenes (total) 5.7 0.25 " <br /> Surrogate:a,a,a-Trifluorotoluene <br /> 40-140 " <br /> Sequoia Analytical-Walnut CIeek The results in this reportapply to the samples analyzed in accordance with the chain of <br /> custody document.This analytical report must be reproduced in its entirety. <br /> Dimple*SamLa.,"Project anager Page 2 of 10 <br />