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' 404 N Wiget Lane <br /> 1 Walnut Creek c 94598 <br /> Sequoia <br /> (925)988 8-9600 <br /> Analytical FAX equo labs co 3 <br /> www sequolalabs corn <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd, Ste 100 Project Number Arco#595, Stockton Reported <br /> Rancho Cordova CAe,95670 Project Manager Rusty Benkosky 29-Aug-01 11 26 <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 /> tnalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Bateb 1 G20008- EPA 5030B McOH <br /> lank(1G20008-BLKI) Prepared 20-Jul-01 Analyzed 23-Jul-Ol <br /> urgeable Hydrocarbons(C6-C 12) ND 10 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 <br /> thylbenzene ND 00050 <br /> Xylenes(total) ND 00050 " <br /> turrogate a a a-Trifluorotoluene 0 660 0 600 110 40-140 <br /> CS(1G20008-BSI) Prepared 20-Jul-Ol Analyzed 25-Jul-01 <br />(enzene0802 00050 mg/kg 0800 100 50-150luene0840 00050 0800 105 50-150 <br /> hylbeazene 0 870 00050 0 800 109 50-150 <br /> Xylenes(total) 263 00050 " 2 40 110 50-150 <br />[*- <br /> a a a-Triuorotoluene 0 796 110 600 133 40-140 <br /> Matrix Spike(1G20008-MSI) Source W107294-05 Prepared 20-Jul-01 Analyzed 26-Jul-01 <br />(enzene 0 758 00050 mg/kg 0 800 ND 948 50-150 <br /> oluene 0 798 00050 0 800 ND 998 50-150 <br /> ylbenzene 0 832 00050 0 800 ND 104 50-150 <br /> Xylenes(total) 248 00050 240 ND 103 50-150 <br /> urrogale a a a-TriJluorotoluene 0 622 0 600 104 40-140 <br /> Matrix Spike Dup(1G20008-MSD1) Source W107294-05 Prepared 20-Jul-01 Analyzed 26-Jul-01 <br /> nzene 0 756 00050 mg/kg 0 800 ND 945 50-150 0 264 20 <br /> oluene 0 798 00050 0 800 ND 998 50-150 000 20 <br /> Ethylbenzene 0 832 00050 " 0 800 ND 104 50-150 000 20 <br />(YIenes(total) 251 00050240 I ND 105 50-150 120 20 <br /> urrogate <br /> aa a-Triuorotoluene 0618 0 600 103 40-140 <br /> 1e ttota Analytical- Walnut Creek The results to 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 /> Page 7 of 13 <br /> I <br />