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404 N Wiget Lane <br /> Sequoia Walnut Creek C94598 <br /> L (925)988 8-9600 <br /> FAX(925)988-9673 <br /> Analytical www 5equoialabs corn <br /> Gettler Rynn,Inc -Rancho Cordova Project Unocal <br /> 3164 Gold Camp Drive 4240 Project Number Unocal#0187 Reported <br /> Rancho Cordova CA 95670 Project Mdndger David Herzog 16-Nov-00 07 22 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE 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 OK09004- EPA 5030E [MeOH] <br /> Blank(OK09004-BLKI) Prepared&Analyzed 09-Nov-00 <br /> Purgeable 1lydrGe,arbons ND 10 mg/kg <br /> Benzene ND 00050 <br /> Toluene ND 00050 <br /> Ethylbenzene ND 00050 <br /> Sylenes(total) ND 00050 <br /> Methyl tert-butyl ether ND 0 050 " <br /> Surrogate a a a-Trfluorotoluene 0 714 — 0 600 119 40-140 <br /> LCS(OK09004-BSI) - Prepared&Analyzed 09-Nov-00 <br /> Benzene 0 748 00050 mg/kg 0 800 93 5 50-150 <br /> Toluene 0 768 00050- 0 800 960 50-150 <br /> benzene 0 812 0 0050 0 800 101 50-150 <br /> ea(total) 240 00050 2 40 100 50-150 <br /> Surrogate a a a-Tnfluorotoluene 0 660 0 600 110 40-140 <br /> Matrix Spike(OK09004-MSI) Source WO11191-01 Prepared&Analyzed 09-Nov-00 <br /> Benzene 0 804 00050 mg/kg 0 800 ND 101 50-150 <br /> Toluene 0 820 00050 0 800 ND 102 50-150 <br /> Ethylbenzene 0 844 00050 0 800 ND 105 50-150 <br /> Xylenes(total) 252 00050 2 40 ND 105 50-150 <br /> Surrogate a a a-Tnfluorotoluene 0 686 0 600 114 40.140 <br /> Matrix Spike Dup (OK09004-MSD1) Source W011191-01 Prepared&Analyzed 09-Nov-00 <br /> Benzene 0 818 00050 mg/kg 0 800 ND 102 50-150 173 20 <br /> Toluene 0 842 00050 0 800 ND 105 50-150 265 20 <br /> Ethylbenzene 0 878 00050 0 800 ND 110 50-150 395 20 <br /> Xylenes(total) 261 00050 240 ND 109 50-150 3 51 20 <br /> Surrogate a a,a-Tnfluorotoluene 0 696 0 600 116 40-140 <br /> uoia Analytical-Walnut Creek The results in this report apply 10 the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 7of9 <br />