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404N WVt Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> (D (925)988 9600 <br /> qw Analytical FAX(925)988 9673 <br /> www se o�alabs can <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd,Ste 01100 Project Number Arco#2133,Stockton Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 14-Aug-02 13 16 <br /> Total Purgeable Hydrocarbons 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 /> Batch 2HO5012-EPA 5030B McOH <br /> Blank(2H05012-BLKI) Prepared 05-Aug-02 Analyzed 06-Aug-02 <br /> Purgeable Hydrocarbons(C6-C 12) ND 10 mglkg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Surrogate a a a-Trtfluorwoluene 0 674 0 600 111 40-140 <br /> LCS(2H05012-BSI) Prepared 05-Aug-02 Analyzed 06-Aug-02 <br /> Benzene 0 596 00050 mg/kg 0 800 745 50-150 <br /> Toluene 0 754 00050 0 800 94 2 50-150 ` <br /> Ethylbenzene 0 792 00050 0 800 99 0 50-150 <br /> Xylenes(total) 237 00050 240 997 50-150 <br /> Surrogate a a a-Trifluorotoluene 0 690 0 600 115 40-140 <br /> Matrix Spike(21105012-MSI) Source W208041-02REI Prepared 05-Aug-02 Analyzed 06-Aug-02 <br /> Benzene 0 680 00050 mg/kg 0 800 ND 85 0 50-150 <br /> Toluene 0 736 00050 0 800 ND 920 50-150 <br /> Ethylbenzene 0 750 00050 0 800 ND 93 8 50-150 <br /> Xylenes(total) 237 00050 240 ND 98 7 50-150 <br /> Surrogate a a a-Trifluorotoluene 0 481 0 600 80.3 40-140 <br /> Matrix Spice Dup(2H05012-MSDI) Source W208041-02RE1 Prepared 05-Aug-02 Analyzed 06-Aug-02 <br /> Benzene 0 590 00050 mglkg 0 900 ND 73 8 50-150 14 2 20 <br /> Toluene 0 700 00050 0 800 ND 875 50-150 501 20 <br /> Ethylbenzene 0 778 00050 0 800 ND 972 50-150 3 66 20 <br /> Xylenes(total) 2 22 00050 240 ND 925 50-150 654 20 <br /> Surrogate a a a-Trifluorotoluene 0 462 0 600 770 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 /> Page i l of 20 <br />