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Sequoia1551 Industrial Road <br /> 4DSan Cai105 CA 94070 <br /> �► Analytical (650)232 9600 <br /> FAX(650)232-961 2 <br /> www sequotalabs coin <br /> Gettler-Ryan/Geostrategles(1) Project Unoca)(4) <br /> 6747 Sierra Court,Suite J Project Number Former Unocal#2859,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 03/04/02 08 47 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEX/MTBE by EPA 8021B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source- %REC RPD <br /> Analyte Result Limit Units Level ' Result %REC Limits RPD Limit Notes <br /> Batch 2020064-EPA 5030B (P/T) <br /> Blank(2020064-BLK1) - - - d__ Prepared&Analyzed 02/20/02 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 50 " <br /> Surrogate a a,a-Tre luorotoluene 969 100 96 9 70-130 <br /> LCS(2020064-BSI) Prepared&Analyzed 02/20/02 <br /> Benzene 880 050 ug/1 100 880 70-130 <br /> Toluene - 876 0 50 100 -876 70-130 <br /> Ethylbenzene 883 0 50 10 0 883 70-130 <br /> Xylenes(total) 204 050 300 88 0 70-130 <br /> Surrogate a a a-Trifluorotoluene Jos 100 105 70-130 <br /> LCS(2020064-BS2) Prepared&Analyzed 02/20/02 <br /> Purgeable Hydrocarbons as Gasoline 308 50 ug/I 250 123 70-130 <br /> Surrogate a a a-Trifluorotoluene 106 100 106 70-130 <br />=Matrix Spike(2020064=MSI)-" Source L202088=03 - Prepared&_Analyzed 02/20/02 <br /> Purgeable Hydrocarbons as Gasoline 261 50 ug/I 250 ND 104 60-140_ <br /> Surrogate a a a-Triuorotoluene 110 100 110 70-130 <br />—`Mat�iz Spike Dnp(2020064-MSDlr ' - _v Source L,202088-03 _ Prepared&Analyzed 02/20/02 ----- ----- -- i - ---- <br /> Purgeable Hydrocarbons as Gasoline 238 50 ug/1 250 ND 95 2 60-140 9 22 25 <br /> Surrogate a,a a-Tnfluorotoluene 105 100 105 70-130 <br /> Sequoia Analytical -San Carlos The results in this report apply to the samples analyzed in accordance with the chain"Jell <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 13 of 18 <br />