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C404 N Wiget Lane ' <br /> ' Sequoia Walnut Creek C 94598 <br /> (925)988 8 9600 <br /> FAX(925)988%73 ' <br /> Itur Analytical www sequoialabs corn <br /> —7 <br /> Secor-Rancho Cordova Project Arco ' <br /> 3017 Kilgore Rd Ste #100 Project Number Arco# 4932,Stockton Departed <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 27-Jul-01 14 25 <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 %REC limits RPD Limit Notes <br /> 3atch 1G17002- EPA 5030B McOH <br /> Stank(IG17002-BLK1) _ Prepared&Analyzed 17-Jul-01 <br /> 'urgeable Hydrocarbons ND I 0 in ikg <br /> 3enzene ND 00050 " <br /> toluene ND 00050 t <br /> :thylbenzene ND 00050 " <br /> Kylenes(total) ND 00050 " <br /> surrogate a a a-TrIfluorotoluene 0 612 0 600 102 40-140 <br /> LCS(1G17002-BS1) Prepared 17-Jul-01 Analyzed 18-Jul-01 <br /> 3enzene 0 744 00050 mg/kg 0 800 930 50-150 <br /> roluene 0 660 00050 0 800 825 50-150 ' <br /> Ethylbenzene 0 778 00050 " 0 800 972 50-150 <br /> Xylenes(total) 244 00050 240 102 50-150 <br /> Surrogate a a a-Tri luoroiolueneT 0 660 0 600 110 40-140 <br /> Matrix Spike(1G17002-MS1) Source W107170-01 Prepared 17-Jul-Ol Analyzed 22-Jul-01 <br /> Benzene 0 748 00050 mg/kg 0 800 ND 935 50-150 <br /> roluene 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-Tr:uorotoluene 0 556 0 600 92 7 40-140 ' <br /> Matrix Spike Dup(iG17002-MSD1) Source W107170-01 Prepared 17-Jul-01 Analyzed 22-Jul-01 - <br /> Benzene _ 0 742 —00050 mg/kg 0 800 ND 928 50-150 0 805 20 , <br /> Toluene 0 804 00050 0 800 ND 100 50-150 380 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-Trrfluorotoluene 0 570 0 600 950 40-140 <br /> Sequoia Analytical- Walnut Creek The results to this report apply to the samples analyzed to accordance with the char.of ' <br /> custody document This analytical report must be reproduced in its entire <br /> Page 7 of 15 , <br />