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fr <br /> Gettler-Ryan/Geostrategtes(l) Project Unocal(4) <br /> 6747 Sierra Court,Suite 7 Project Number Former Unocal SS#0123 Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 04/04/01 13 15 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT -Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result limit Units Level Result %REC Lamas RPD Law Motes <br /> Batch 1030105;EPA 5030B(P/T) <br /> Blank(1030105-BLKI) Pr ared&Analyzed 03/30/01 <br /> Purgeable Hydrocarbons as Gasoline ND 500 ug/l <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbeitzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND 500 " <br /> Surrogate a a a-Trifluorotoluene 952 100 952 70-130 <br /> LCS(1030105-BSI) Prepared&Analyzed 03/30/01 <br /> Benzene 857 0 500 ug/l 100 857 70-130 <br /> Toluene 861 0 500 100 861 70-130 <br /> Ethyibenzene 857 0 500 100 857 70-130 <br /> Xylenes(total) 258 0 500 300 860 70-130 <br /> Surrogate a a a-Trifluorotoluene 943 100 943 70-130 <br /> _LCS(1030105-BS2) Prepared&Analyzed 03/30/01 <br /> Purgeable Hydrocarbons as Gasolme 272 500 ug/l 250 109 70-130 <br /> Surrogate a,a,a-Witorotoluene —115 100 115-70=130 <br /> Matrix Spike(1030105-MSI) Source L103137-03 Prepared&Analyzed 03/30_/_0.1 <br /> Benzene 873 0 500 ug/1 100 ND 873 60-140 <br /> Toluene 879 0 500 100 ND 879 60-140 <br /> Ethylbenzene 893 0 500 100 ND 893 60-140 <br /> Xylenes(total) 269 0 500 300 ND 897 60-140 <br /> Surrogate a,a,a-Trifluorotoluene 998 100 998 70-130 <br /> Matrix Spike Dup(1030105-MSDI) Source;L103137-03 Prepared 03/30/01 Analyzed 03/31/01 <br /> Benzene 868 0 500 ug/l 100 ND 868 60-140 0 574 25 <br /> Toluene 864 0 500 " 100 ND 864 60-140 172 25 <br /> Ethyibenzene 862 0 500 100 ND 862 60-140 353 25 <br /> Xylenes(total) 260 0 500 300 ND 867 60-140 340 25 <br /> Surrogate a aa-Trifluorotoluene 988 " 100 988 70-130 <br /> Sequoia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the chain o <br /> 0 <br /> custody document 77tts analytical report must be reproduced in res entirety <br /> Page 18 of 27 <br />