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404 N WISet Lane <br /> y Walnut Creek,CA 94598 <br /> Sequoia FAX(925)988-9600 <br /> (925)988-9673 <br /> —- www.sequotalabs cc-n <br /> *QOF Analytical - <br /> Gettler Ryan,Inc -Dublin Project. Unocal <br /> project Number Unocal# 1205 Reported <br /> 6747 Sierra Court Suite J 08-Feb-01 07 55 <br /> Dublin CA,94568 project Manager Deanna L Harding <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek --- <br /> Reporttug Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch IA22004-EPA 5030B[P17'] <br /> Prepared&Analyzed 20-Jan-01 <br /> Blank(1A22004-BLKI) <br /> Purgeable Hydrocarbons ND 50 u� <br /> Benzene ND 0 SO " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Mdhyl Cert-butyl ether ND 25 " <br /> Sw7vgare qo a-Trrfluororoluene <br /> 314 30 0 105 70-!30 <br /> Prepared&Analyzed 20-Jan-01 <br /> LCS(1A22004-BS1) 915 70-130 <br /> Benzene 18 3 0 50 ug/l 20 0 <br /> Toluene <br /> 193 0 SO " 20 0 96 S 70-130 <br /> Ethylbenzene <br /> 207 050 200 <br /> 104 70-130 <br /> Xylenes(total) <br /> 616 0 50 600 103 70-130 <br /> Surrogate 4 a,a-TnfIuorotoluem <br /> 296 300 9117 70-130 <br /> Matrix Spike(1A22004--MSI) Source W101455-02 Prepared&Analyzed 20-Jan-01 <br /> Benzene 19 2 0 so i,g/l 20 o ND 96 0 70-130 <br /> Toluene 204 0 50 " 200 ND 102 70-130 <br /> Ethylbenzene 214 050 200 ND 107 70-130 <br /> Xylenes(total) <br /> 646 0 50 600 1 1 106 70-130 <br /> Surrogate qa.a-Trrfluarotoluene <br /> 315 300 108 70-130 <br /> Matrix Spike Dup (1A22004 MSDI) Source W10145"2 Prepared&Analyzed 20-Jan-01 <br /> Benzene 192 050 u9/1 20 0 ND 960 70-130 0 20 <br /> Toluene <br /> 205 050 200 ND 103 70-130 0 489 20 <br /> Ethylbenzene 214 050 200 ND 107 70-130 0 20 <br /> Xylenes(total) 657 050 60 0 1 1 108 70-130 169 20 <br /> Surrogate a,aa-TnfluorotoIuem 315 <br /> " 3Q 0 IOS 70-130 <br /> Sequoia Analyoeal-Walnut Cret,k The results to this report apply to the samples analysed to accordmrce with the chain of <br /> custody document.This analytical report must be reproduced to its mal, <br /> -- Page-11-of-14— <br />