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1551 Industrial Road <br /> Sequoia San Caiios,CA 94070-4111(650) <br /> 4070-41114 (65D)232-9600 <br /> ,Q FAX(650)732-9612 <br /> Analytical w 'seqUOIalabs;corn n <br /> GeWer-Ryan/Geostrategies(l) Project: Tosco(5)-ZZ <br /> _ 6747 Sierra Court Suite J Project Number Tosoo(Unocal)SS#6981 Reported <br /> Dublin CA,94568 - -- - Project Manager• Deanna Haring — - 01111/01-13 54 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUff - Quality Control <br /> Sequoia Analytical-San Carlos <br /> Rgmmng Spih Source vaREC RPD <br /> ,cyte Result Lmit Units level Result %REC i mrts RPD Lrmt Notes <br /> Batch 1010008-EPA 5030B <br /> Blank(1010008-BLKl) Prepared 8t Analyzed 01/03/01 <br /> Purgeable Hydrocarbons as Gasoline ND Soo u8n <br /> Benzine ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl etber ND 500 " <br /> Surrogate aaa-Y)jf orotoluene 962 100 962 70-130 <br /> LCS(1010008-BSI) Prepared&Analyzed 01/03/01 <br /> Benzene 922 0 500 u9/1 100 922 70-130 <br /> Toluene 872 0 500 100 872 70-130 <br /> Etbylbenzene 893 0 500 100 883 70-130 <br /> Xylenes(total) 266 0 500 " 300 887 70-130 <br /> Surrogate a,a,a-Wuorotolueae 105 " 100 105 70-130 <br /> LCS(1010008-BS2) Prepared&Analyzed 01/03/01 <br /> Purgmble Hydiocaibons as Gasoline 235 Soo ug/l 250 940 70-130 <br /> Surrogate a aa-7nl luorotoluene 8S2 100 8S2 70-130 <br /> Matrix Spike(1010008-MSI) Source.L012210-I4 Prepared 01/03/01 Analyzed 01/04/01 <br /> Purgeable Hydrocarbons as Gasoline 247 500 ug4 250 ND 998 60-140 <br /> Surrogate a,a,a-Trijluorotoluene 101 100 101 70-130 <br /> Matrix Spike Dup(1010008-MSD1) Source-L012210-14 Prepared 01/03/01 Analyzed 01/04/01 <br /> Purgeable Hydrocarbous as Gasohne 247 500 ug/l 250 ND 998 60-140 0 25 <br /> Surrogate aa,a-Wuorotoluene 103 100 103 70-130 <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chalp <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 15 of 27 <br /> z� <br />