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Gettler-Ryan/Geostrategies(1) Project: Tosco(1) <br /> 6747 Sierra Court,Suite 7 Project Number: Tosco#11195,Lathrop,CA Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 05/25/01 14:01 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting Spile Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1050100-EPA 5030B(P/T) <br /> Blank(1050100-BLKI) Prepared&Analyzed:05/23/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50.0 ug/I <br /> Benzene ND 0.500 " <br /> Toluene ND 0.500 " <br /> Ethylbenzene ND 0.500 " <br /> Xylenes(total) ND 0.500 " <br /> Methyl tert-butyl ether ND 5.00 " <br /> Surrogate:a,a,a-Trifluorotoluene 9.12 10.0 91.2 70-130 <br /> LCS(1050100-BSI) Prepared&Analyzed:05/23/01 <br /> Benzene 9.67 0.500 ug/I 10.0 96.7 70-130 <br /> Toluene 10.1 0.500 10.0 101 70-130 <br /> Ethylbenzene 10.9 0.500 10.0 109 70-130 <br /> Xylenes(total) 32.6 0.500 30.0 109 70-130 <br /> Surrogate:a,a,a-Tris luorotoluene 9.93 10.0 99.3 70-130 <br /> LCS(1050100-BS2) Prepared&Analyzed:05/23/01 <br /> Purgeable Hydrocarbons as Gasoline 237 50.0 ug/1 250 94.8 70-130 <br /> Surrogate:a,a,a-Trifluorotoluene 10.0 " 10.0 100 70-130 <br /> Matrix Spike(1050100-MSI) Source:L105115-01 Prepared:05/23/01 Analyzed:05/24/01 <br /> Benzene 8.55 0.500 USA 10.0 ND 85.5 60-140 <br /> Toluene 8.42 0.500 " 10.0 ND 84.2 60-140 <br /> Ethylbenzene 8.63 0.500 10.0 ND 86.3 60-140 <br /> Xylenes(total) 25.7 0.500 30.0 ND 85.7 60-140 <br /> Surrogate:a,a,a-Trifluorotoluene 8.59 10.0 85.9 70-130 <br /> Matrix Spike Dup(1050100-MSDI) Source:L105115-01 Prepared:05/23/01 Analyzed:05/24/01 <br /> Benzene 8.28 0.500 ug/1 10.0 ND 82.8 60-140 3.21 25 <br /> Toluene 8.18 0.500 10.0 ND 81.8 60-140 2.89 25 <br /> Ethylbenzene 8.38 0.500 10.0 ND 83.8 60-140 2.94 25 <br /> Xylenes(total) 24.9 0.500 30.0 ND 83.0 60-140 3.16 25 <br /> Surrogate:a,a,a-Trifluorotoluene 8.39 10.0 83.9 70-130 <br /> Sequoia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the cha. <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page 12 of 20 <br />