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s <br /> Sequoia 1551 Industrial Road <br /> 41) San Carlos CA 94070 <br /> Analytical (650)2329600 <br /> FAX(650)232-9612 <br /> WWW sequoialabs win <br /> Gettler-Ryan/Geostrategies(l) Project Unocal(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 2020071 -EPA 5030B (P/T) <br /> Blank(2020071-BLKI) - Prepared&Analyzed 02/21/02 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/1 <br /> Benzene ND 050 n <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 50 " <br /> Surrogate a a a-Tris luorotoluene 760 100 760 70-130 <br /> LCS(2020071-BSI) Prepared&Analyzed 02/21/02 <br /> Benzene 800 050 u9/1 100 800 70-130 <br /> Toluene 805 050 100 8C5 70-130 <br /> Ethylbenzene 8 11 050 100 81 1 70-130 <br /> Xylenes(total) 246 050 300 820 70-130 - <br /> Surrogate a a a-Triuorotoluene 817 100 81 7 70-130 <br /> LCS(2020071-BS2) Prepared&Analyzed 02/21/02 <br /> Forgeable Hydrocarbons as Gasoline 243 50 ug/I 250 972 70-130 <br /> Surrogate a a a-Trifluorotoluene 776 100 776 70-130 <br /> Matrix Spike(2020071-MS1) -_ Source L202097-03 Prepared&Analyzed 02/21/02 <br /> Benzene 8 12 050 ug/l 10 0 ND 81 2-60-140 <br /> Toluene -- ---- 8 13 --- 050 " 100 ND 813 60-140— ---Ethylbenzene---.-.--- ---___--- ---8 15--- �-050 --- "--10=-100-=--ND -y- 81 5-=-60-140- -- - - -- - - - -_ <br /> Xylenes(total) 246 050 300 ND 82 0 60-140 <br /> Surrogate a a a-Tnfluorotoluene 851 100 851 70-130 <br /> Matrix Spike Dup(20200_71-MSD1) Source L202097-03 Prepared&Analyzed 02/21/02 <br /> Benzene 906 0 50 ugfl 100 ND 90 6 60-140 109 25 <br /> Toluene 905 050 100 ND 90 5 60-140 107 25 <br /> Ethylbenzene 9 15 0 50 10 0 ND 91 5 60-140 116 25 <br /> Xylenes(total) 273 050 300 ND 91 0 60-140 104 25 <br /> Surrogate a a a-Tnfluorotoluene 831 100 831 70-130 <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document This analytical report must be reproduced in its entirety 0 <br /> Page 15 of 18 <br />