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404 N WLane <br /> Sequoia Walnut Creek,CAA 94598 <br /> (925)988 9600 <br /> Ask 1WAnalytical FAX(925)988 9673 <br /> www sequoialabs corn <br /> Secor-Rancho Cordova Project BP <br /> 3017 Kilgore Rd,Ste #100 Project Number BP#595,Stockton Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01-Jul-02 07 59 <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 /> Batch 2F28002-EPA 5030B McOH <br /> Blank(2F28002-BLKI) Prepared&Analyzed 28-Jun-02 <br /> Purgeable Hydrocarbons(C6-C12) ND 10 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Surrogate a a a-Trifluorotoluene 0 668 0 600 111 40-140 <br /> LCS(2F28002-BSI) Prepared&Analyzed 28-Jun-02 <br /> Benzene 0 744 00050 mg/kg 0 800 93 0 50-150 <br /> Toluene 0 740 00050 0 800 925 50-150 <br /> Ethylbenzene 0 752 00050 0 800 940 50-150 <br /> Xylenes(total) 227 00050 240 946 50-150 <br /> W <br /> rrogate a a a-Trtfluorotoluene 0 640 0 600 107 40-140 <br /> atrix Spike(2F28002-MSI) Source W206466-01 Prepared&Analyzed 28-Jun-02 <br /> Benzene 0 492 00050 mg/kg 0 800 ND 615 50-150 <br /> Toluene 0 516 00050 0 800 ND 645 50-150 <br /> Ethylbenzene 0 534 00050 0 800 ND 668 50-150 <br /> Xylenes(total) 171 00050 240 ND 71 2 50-150 <br /> Surrogate a a a-Trfluorotoluene 0 548 0 600 913 40-140 <br /> Matrix Spike Dup(2F28002-MSDI) Source W206466-01 Prepared&Analyzed 28-Jun-02 <br /> Benzene 0 524 00050 mg/kg 0 800 ND 65 5 50-150 630 20 <br /> Toluene 0 550 00050 0 800 ND 68 8 50-150 638 20 <br /> Ethylbenzene 0 576 00050 0 800 ND 72 0 50-150 7 57 20 <br /> Xylenes(total) 181 0 0050 240 ND 75 4 50-150 568 20 <br /> Surrogate a s a-Trtfluorotoluene 0 578 0 600 963 40-140 <br /> i <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 4 of 6 <br />