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404 N.Wiget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> Pinnacle/IT Project: Arco <br /> Project Number: Arco#6080,Lathrop Reported: <br /> ' <br /> 2201 Broadway Suite 101 � 14-Sep-99 10:28 <br /> Oakland CA,94612 Project Manager: Joel Coffman <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 Nota <br /> PL-1 (W909150-05)Sail Sampled: 08-Sep-99 10:45 Received:08-Sep-99 14:30 <br /> Purgeable Hydrocarbons ND 1.0 mg/kg 20 9I09015 09-Sep-99 09-Sep-99 DHS LUFT <br /> 11 <br /> Benzene <br /> ND 0.0050 " 11 1. " <br /> Toluene 0.0067 0.0050 IF " " <br /> 1. <br /> Ethylbenzene ND 0.0050 it <br /> 11 <br /> Xylenes(total) 0.020 0.0050 if <br /> Surrogate:a,a,a-Trifluorotoluene 95.0% 40-140 " <br /> PL-2(W909150-06)Soil Sampled: 08-Sep-99 11:00 Received:08-Sep-99 14:30 P-01 <br /> Purgeable Hydrocarbons 6.3 1.0 mg/kg 20 9109016 09-Sep-99 09-Sep-99 DHS LUFT <br /> Benzene ND 0.0050 " <br /> Toluene ND 0.0050 " <br /> Ethylbenzene <br /> 0.0073 0.0050 <br /> Xylenes(total) <br /> 0.17 0.0050 <br /> Surrogate:a,a,a-Trifluorotoluene 90.0% 40-140 " <br /> PL-3(W909150-07)Soil Sampled: 08-Sep-99 11:15 Received:08-Sep-99 14:30 <br /> Purgeable Hydrocarbons ND 1.0 mg/kg 20 9I09016 09-Sep-99 09-Sep-99 DHS LUFT <br /> Benzene ND 0.0050 11 " <br /> Toluene ND 0.0050 of 11 " " <br /> 1 11 <br /> Ethylbenzene ND 0.0050 " <br /> Xylenes(total) 0.012 0.0050 " <br /> Surrogate:a,a,a-Trifluorotoluene 91.7 <br /> 40-140 " <br /> PL4(W909150-08)Soil Sampled: 08-Sep-9911:30 Received: 08-Sep-99 14:30 <br /> Purgeable Hydrocarbons ND 1.0 mg/kg 20 9I09016 09-Sep-9909-Sep-99 DHS LUFT <br /> Benzene ND 0.0050 11 " <br /> Toluene ND 0.0050 It <br /> " " " <br /> Ethylbenzene ND 0.0050 IF <br /> 11 11 11 <br /> ;; <br /> Xylenes(total) ND 0.0050 If <br /> 11 Surrogate:•a,a,a-Trif luorotoluene <br /> 98.3% 40-140 <br /> Sequoia Analytical -Walnut Creek 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 /> Dunpa om"rojec&alr-iager Page 3 of 10 <br />