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404 N Wtget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> I (925)988 9600 <br /> Analytical FAX(925)988-9673 <br /> www mquoialabs can <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 15-Jul-02 12 49 <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 2GO2001 -EPA 5030B McOH <br /> Blank(2G02001-BLKI) Prepared&Analyzed 02-Jul-02 <br /> Purgeable Hydrocarbons(C6-C 12) 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-Tr�fluorotoluene 0 678 0 600 113 40-140 <br /> LCS(2G02001-BSI) Prepared&Analyzed 02-Jul-02 <br /> Benzene 0 768 00050 mg/kg 0 800 960 50-150 <br /> Toluene 0 768 00050 0 800 960 50-150 <br /> Ethylbenzene 0 776 00050 0 800 970 50-150 <br /> Xylenes(total) 236 00050 240 983 50-150 <br /> Surrogate a a a-Triuorotoluene 0 666 0 600 111 40-140 <br /> Ylatnx Spike(2G02001-MSI) Source W207008-01 Prepared&Analyzed 02-Jul-02 <br /> Benzene 0 776 00-050 mg/kg 0 800 ND 97 0 50-150 <br /> Toluene 0 768 00050 0 800 ND 960 50-150 <br /> Ethylbenzene 0 780 00050 0 800 ND 97 5 50-150 <br /> Xylenes(total) 238 00050 240 ND 99 2 50-150 <br /> Surrogate aaa-Trzuorotoluene 0 542 0 600 903 40-140 <br /> Matrix Spike Dup(2G02001-MSDI) Source W207008-01 Prepared&Analyzed 02-Jul-02 <br /> Benzene 0 736 00050 mg/kg 0 800 ND 920 50-150 529 20 <br /> Toluene 0 734 0 0050 0 800 ND 91 8 50-150 453 20 <br /> Ethylbenzene 0 738 00050 0 800 ND 92 2 50-150 5 53 20 <br /> Xylenes(total) 228 00050 240 ND 95 0 50-150 429 20 <br /> Surrogate a a a-Tris luorotoluene 0 508 0 600 84 7 40-140 <br /> Sequoia Analytical-Walnut Creek The results to this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 18 of 22 <br />