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Gettler-Ryan/Geostrategies(1) Project Tosco(1) <br /> project Number Unocal Circle K SS#1205,Lathrop,CA Reported <br /> 6747 Sierra Court,Suite J 05/10/01 15 16 <br /> Dublin CA,94568 Project Manager Deanna Harding <br /> Tota! Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting <br /> Spike Source %REC RPD <br /> Analyte Result Lmit Units ILWI Result %RFC Limits RPD LmA Notes <br /> Batch 1050022-EPA 5030B (P/T <br /> LCS(1050022-BS3) Prepared&Analyzed 05/08/01 <br /> Benzene 8 12 0 500 ug/l 100 81 2 70-130 <br /> Toluene 806 0 500 100 806 70-130 <br /> Ethylbenzene <br /> 806 0 500 100 806 70-130 <br /> Xylenes(total) 24 3 0 500 300 810 70-130 <br /> 100 887 70-130 <br /> Surrogate a a a-Trifluorotoluene <br /> 887 <br /> LCS(1050022-BS4) Prepared&Analyzed 05/08/01 <br /> Forgeable Hydrocarbons as Gasoline <br /> 292 500 u911 250 117 70-130 <br /> Surrogate a,a a-Tr fluorotoluene <br /> 960 100 960 70-130 <br /> Mftx Spike(1050022-MSI) Source L104166-14 Prepared&Analyzed 05/08/01 <br /> ble Hydrocarbons as Gasoline 266 500 ug/i 250 ND 106 60-140 <br /> Surrogate a a a-Trifluoratoluene <br /> 7 92 100 792 70-130 <br /> Matrix Spike Dup(1050022-MSDI) Source L104166-14 Prepared&Analyzed 05/08/01 <br /> Purgeable Hydrocarbons as Gasoline 291 500 ui / 250 Nil 116 60-140 898 25 <br /> Surrogate a a a-TnjIuororoluene <br /> 793 100 79 3 70-130 <br /> Batch 1050031 -EPA 5030B(PIT) <br /> Blank(1050031-BLK1) Prepared&Analyzed 05/09/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 0 ug/l <br /> Benzene <br /> ND 0 500 <br /> " <br /> Toluene <br /> ND 0 500 " <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 " <br /> Methyl tett-butyl ether ND 500 <br /> 100 111 70-130 <br /> Surrogate a a a-Trfluorotoluene <br /> 11 1 <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 10 of 16 <br />