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s <br /> Gettler-Ryan/Geostrategies(1) Project Tosco(1) <br /> ted <br /> 6747 Sierra Court,Suite 7 Project Number Tosco(Unocal)SS#6981 22PO1 <br /> Dublin CA,94568 Project Manager Deanna Harding 03/22/01 13 29 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUF1'- Quality Control <br /> Sequoia Analytical-San Carlos <br /> Reporting Spike Source %REC RPD <br /> [Analyte Result Limit units Level Result %"RSC Limits RPD linut Notes <br /> Batch 1030058-EPA 5030B(P <br /> Blank(1030058-BLK1) Prepared&Analyzed 03/16/01 <br /> Purgeable Hydrocarbons as Gasoline ND 500 ug/l <br /> Benzene ND 0 501 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND 500 " <br /> Surrogate a,a a-Triuorotoluene 110 100 110 70-130 <br /> LCS(1030058-BS1) Prepared&Analyzed 03/16/01 <br /> Benzene 991 0 500 ug/1 100 991 70-130 <br /> W=e <br /> 981 0500 100 981 70-130 <br /> 10 1 0 500 100 101 70-130 <br /> Xylenes(total) 302 0 500 300 101 70-130 <br /> Surrogate a a a-Tri luorotoluene 99S 100 995 70-130 <br /> LCS(1030058-BS2) Prepared&Analyzed 03/16/01 <br /> Purgeable Hydrocarbons as Gasohne 241 500 119/1 250 964 70-130 <br /> Surrogate a,a,a-Trrfluorotoluene 106 100 106 70-130 <br /> Matrix Spike(1030058-MS1) Source-L103050-15 Prepared 03/16/01 Analyzed 03/17/01 <br /> Benzene 933 0 500 ug/l 10 0 ND 933 60-140 <br /> Toluene 941 0 500 l0 0 ND 941 60-140 <br /> Etbylbenzene 943 0 500 " 10 0 ND 943 60-140 <br /> Xylenes(total) 285 0 500 300 ND 950 60-140 <br /> Swrrogate aaa-Trifluorotoluene <br /> IO 5 100 IOS 70-130 <br /> Matrix Spike Du (1030058-MSDI) Source L103050-15 Prepared 03/16/01 Analyzed 03/17/01 <br /> mye 9 54 0 500 ug/I 100 ND 954 60-140 223 25 <br /> EkmzToluene 9 60 0 500 100 ND 960 60-140 200 25 <br /> Ethylbenzene 959 0 500 n100 ND 959 60-140 168 25 <br /> xylenes(total) 293 0 500 300 ND 97 7 60-140 277 25 <br /> Surrogate a,a,a-Wuorotoluene <br /> 102 100 102 70-130 <br /> uoLa Analytical-San Cellos The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document Th+s analytical report must be reproduced in its entirety <br /> Page 18 of 25 <br />