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1551 Industrial Road <br /> San mss,CA 94070-4111 <br /> Sequoia (650)232-9600 <br /> FA_X(850)232-%12 <br /> Analytical www sequolalabs co <br /> .wr <br /> M tler-Ryan/Geostrategtes(l) Protect Tosco(5)-ZZ <br /> 6747 Sierra Court,Suite 3 Project Number Tosca(Unocal)SS#6981 Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 01111 vol 13 54 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFF -Quality Control <br /> Sequoia Analytical-San Carlos <br /> Rmorong SAC Source %RW RPD <br /> AWyu Result lama Units Level Result %REC Ltrnrts RPD L+aut Nates <br /> Batch 1010001-EPA 5030B <br /> Blank(1010001-BLKI) Prepared&Analyzed 01/02/01 <br /> Purgeable Hydrocarbons as Gasoline ND 500 ug/l <br /> Benzene AID 0 500 " <br /> TAM= ND 0 500 " <br /> Edwlbenzene ND 0 500 " <br /> Xylenes(total) AID 0 500 " <br /> Methyl tert4mtyl ether ND 500 " <br /> Surrogate a,a,a-Thfluorotoluene 784 100 784 70430 <br /> LCS(1010001-BSI) Prepared Ar Anal 01/02/01 <br /> Benzene 896 0 500 u9/1 100 896 70-130 <br /> fZ <br /> 838 0500 100 838 70-130 <br /> 8 50 0500 100 850 70-130 <br /> 25 6 0 500 300 85 3 70-130 <br /> Surrogate a,a,a-Tlrifluorotolaene <br /> 866 100 866 70-130 <br /> LCS(1010001-BS2) Prepared&Analyzed 01/02/01 <br /> Purgeable Hydrocarbons as Gasoline 224 Soo 119/1 250 896 70-130 <br /> Surrogate a aa-Driuorotoluene 847 100 847 70-130 <br /> Matrix S ike(1010001 MSl) <br /> Source-L012209-01 Prepared&Analyzed 01/02/01 <br /> Benzwe 103 0 500 ug/l too ND 103 60-140 <br /> Tohnene 955 0 500 100 ND 955 60-140 <br /> Ethylbenzene 962 0 500 100 ND 962 60-140 <br /> xylenes(total) 284 0 500 300 ND 947 60-140 <br /> Surrogate a,a,a-Tr{fluorotoluene <br /> 106 " 100 106 70-130 <br /> Matrix Spike Du (1010001-MSD1) Source L012209-01 Prepared&Analyzed 01/02/01 <br /> Benue 10 5 0 500 uga too ND 105 60-140 192 25 <br /> TOW= 983 0 500 100 ND 983 60-140 289 25 <br /> 10 3 0 500 100 ND 103 60-140 6 83 25 <br /> Ethyibeo7zene <br /> Xyle=(total) 30 9 0 500 300 ND 103 60-140 843 25 <br /> Surrogate a,a,a-Tr{fluororoluene <br /> U.1 ^ 100 111 70-130 <br /> Analytical-San Carlos The results in this report apply to the samples analyzed in acconku ce with the chain of <br /> custody document This analytical report must be reproduced in its en" <br /> Page 14 of 27 <br />