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404 N Wiget Lane ' <br /> Sequoia Walnut Creek CA 94598 <br /> (925)IDFAX(925)988-96703 <br /> �„� Analytical www sequoialabs coin ' <br /> Secor-Rancho Cordova Project Arco <br /> 3017 Kilgore Rd , Ste #100 Project Number Arco# 595, Stockton Reported ' <br /> Rancho Cordova CA, 95670 Project Manager Clint Harms 07-Aug-01 13 12 <br />_ Total Purgeable Hydrocarbons (C6-C12) and BTEX by DHS LUFT - Quality Control <br /> Sequoia Analyt>cal - Walnut Creek <br /> Reporting Spike Source %REC RPD , <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1G27003- EPA 5030B McOH <br /> Blank(1G27003-BLK1) - Prepared 27-Jul-01 Analyzed 28-Jul-01 <br /> Purgeable Hydrocarbons - -ND - 1 0- mg/kg - _ -- _ - ------ ---------- --- -- - <br /> Benzene ND 00050 " <br /> Toluene ND 00050 1 <br /> Ethylbenzene ND 00050 <br /> Xylenes(total) ND 00050 " <br /> Surrogate a a a-Triuorotoluene 0 720 -� " 0 600 <br /> LCS(IG27003-BSI) Prepared 27-Jul-01 Analyzed 28-Jul-01 <br /> Benzene 0 826 00050 mg/kg -0800 103 50-150--- <br /> Toluene <br /> 0 -Toluene 0 868 00050 0 800 108 50-150 <br /> Ethylbenzene 0 910 00050 0 800 114 50-150 <br /> Xylenes(total) 2 70 00050 240 112 50-150 <br /> Surrogate a a a-Triuorotoluene 0 736 - 0 600 123 40-140 -� 01 <br /> Matrix Spike(I G27003-MS 1) Source W107431-02 Prepared 27-Jul-01 Analyzed 29-Jul-01 <br /> Benzene 0 766 0 0050 mg/kg _T8_00 - ND 93-8 50-150 -� <br /> Toluene 0 798 00050 0 800 ND 998 50-150 <br /> Ethylbenzene _ 0 832-= - -00050_- 0 800- _ ND - 104 50-150 <br /> Xylenes(total) 248 00050 240 ND 103 50-150 <br /> Surrogate a a a-Trij7uorotoluene 0 632 0 600 105 40-140 - <br /> Matrix Spike Dup(IG27003-MSD1) Source W107431-02 Prepared 27-Jul-01 Analyzed 29-Jul-Ol <br /> Benzene - - - - - -- - -- - 0 798 -� 00050 mg/kg 0 800 ND 998 - 50-150 - 4 09 _-_ 20 <br /> Toluene 0 840 00050 0 800 ND 105 50-150 5 13 20 <br /> Ethylbenzene 0 870 00050 0 800 ND 109 50-150 447 20 <br /> Xylenes(total) 260 00050 240 M7 108 50-150 472 20 <br /> Surrogate a a a-Triuorotoluene 06.52 0 600 109 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 entire <br /> Page 11 of 15 <br />