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i <br /> 404 N Wiget Lane ' <br /> Sequoia Walnut Creek CA 9 9600 <br /> (925)988 9600 <br /> FAX(925)988 9673 <br /> Analytical wwwsequoialabs com ' <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd Ste 0100 Project Number Arco 0 4932 Reported <br /> Rancho Cordova CA 95670 Project Manager Rusty Benkosky 26-Jul-01 12 27 <br /> Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek ' <br /> Reporting Spike Source %REC RPD ' <br /> Analyte Result Limit Units Level Result %RCC Limits RPD Limit Notes <br /> Batch 1G17002- EPA 50308 McOH <br /> Blank(1G17002-BLKI) Prepared&Analyzed 17-Jul-01 , <br /> Purgeable Hydrocarbons ND 1 0 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 ' li <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Surrogate a a a-Trifluorotoluene 0 612 - 0 600 102 40-140 ' <br /> LCS(IG17002-BSI) Prepared 17-Jul-01 Analyzed 18-Jul-01 <br /> Benzene 0 744 00050 mg/kg 0 800 930 50-150 <br /> Toluene 0 660 00050 0 800 825 50-150 ' <br /> Ethylbenzene 0 778 00050 0 800 972 50-150 <br /> Xylenes(total) 2 44 00050 240 102 50-150 <br /> Surrogate a a a-Tr�fluorotoluene 0 660 0 600 110 40-140 <br /> Matrix Spike(1G17002-MSI) Source W107170-01 Prepared 17-Jul-01 Analyzed 22-Jul-01 <br /> Benzene 0 748 4 00050 mglkg 0 800 ND 935 50-150 ' <br /> Toluene 0 774 00050 0 800 ND 968 50-150 <br /> Ethylbenzene 0 828 00050 0 800 ND 104 50-150 <br /> Xylenes(total) 246 00050 240 ND 102 50-150 <br /> Surrogate a a a-Tri luorololuene 05.56 110 600 92 7 40-140 ' <br /> Matrix Spike Dup(I G I 7002-MSD 1) Source W107170-01 Prepared 17-Jul-01 Analyzed 22-Jul-01 <br /> Benzene 0 742 00050 mg/kg 0 800 ND 929 50-150 0 805 20 ' <br /> Toluene 0 804 00050 0 800 ND 100 50-150 3 80 20 <br /> Ethylbenzene 0 836 00050 0 800 ND 104 50-150 0 962 20 <br /> Xylenes(total) 2 52 00050 240 ND 105 50-150 241 20 <br /> Surrogate a a a-Trifluorololuene 0 570 0 600 9.50 40-140 <br /> Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain a ' <br /> custody document 7hrs analytical report must be reproduced rn us entr* <br /> Page 7 of 13 <br /> r� ' I <br />