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Ciettler-Ryan/Geostrategies(1) Project. Tosco(1) <br /> 6747 Sierra Court,Suite 7 Project Number: Unocal SS#11195 Reported; <br /> Dublin CA,94568 Project Manager: Deanna Harding 02/26/01 14:46 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical-San Carlos <br /> Reporting Spike Source °/oREC RPD <br /> lAnalyte , Result limit Units Level Result °/AEC Limits RPD limit Notes <br /> Batch 1020067-EPA 5030B(PnD <br /> Blank(1020067-BLKI) Prepared&Analyzed:02/22/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50.0 ug/1 <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-71•rfluoroioluene 10.3 10.0 103 70-130 <br /> LCS(1020067-BSI) Prepared&Analyzed:02/22/01 <br /> Benzene 11.2 0.500 ug/1 10.0 112 70-130 <br /> Toluene 11.4 0.500 10.0 114 70-130 <br /> :. Ibenzene 11.5 0.500 10.0 115 70-130 <br /> Xylenes(tow) 34.6 0.500 30.0 115 70-130 <br /> Surrogate:a,a,a-Triuorotoluene 10.8 10.0 108 70-130 <br /> LCS(1020067 BS2) Prepared&Analyzed:02/22/01 <br /> Purgeable Hydrocarbons as Gasoline 274 50.0 ug/l 250 110 70-130 <br /> Surrogate:a,a.a-Trifluorotoluene 12.2 if10.0 122 70-130 <br /> Matrix Spike(1020067-MSI) Source:L102012-05 Prepared&Analyzed:02/22/01 <br /> Benzene 11.9 0.500 ug/l 10.0 ND 119 60-140 <br /> Toluene 12.2 0.500 10.0 ND 122 60-140 <br /> Ethylbenzene 12.3 0.500 10.0 ND 123 60-140 <br /> Xylenes(total) 36.2 0.500 30.0 ND. 121 60-140 <br /> Surrogate:a,a,a-Trnuorotoluene 10.6 10.0 106 70-130 <br /> Matrix Spike Dap(1020067-MSD 1) Source:L102012-05 Prepared&Analyzed:02/22/01 <br /> 10.0 ND 118 60-140 0.844 25 <br /> Benzene 11.8 0.500 ugn <br /> Toluene 11.6 0.500 10.0 ND 116 60-140 5.04 25 <br /> Ethylbenzene 12.0 0.500 10.0 ND 120 60-140 2.47 25 <br /> Xylenes(total) 36.2 0.500 30.0 ND 121 60-140 0 25 <br /> Surrogate:a,a,a-Mfluorotoluene 10.3 " 10.0 103 70-130 <br /> ' ,Sequoia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety. <br /> Page 13 of 18 i <br />