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Gettler-Ryan/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court,Suite J Project Number Tosco SS#4409 Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 04/19/01 15 27 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT -Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units level Result %REC Limits RPD Unut Notes <br /> Batch 1040051 -EPA 5030B(PIT) <br /> Blank(1040051-BLKI) Prepared&Analyzed 04/14/01 <br /> Purgeable Hydrocarbons as Gasoline ND 500 ug/l <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 500 " <br /> Surrogate a a a-Tri luorotoluene 740 100 740 70-130 <br /> Blank(1040051-BLK2) Prepared&Analyzed 04/16/01 <br /> Purgeable Hydrocarbons as Gasoline ND Soo u9A <br /> JFe ND 0 500 <br /> e 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 Trii luorotoluene 101 100 101 70-130 <br /> LCS(1040051-BS1) Prepared&Analyzed 04/14/01 <br /> Benzene 899 0 500 ug/l too 899 70-130 <br /> Toluene 9 08 0 500 too 908 70-130 <br /> Ethylbenzene 908 0 500 too 90 8 70-130 <br /> Xylenes(total) 277 0 500 300 923 70-I30 <br /> Surrogate a a a-Triuorotoluene 888 100 888 70-130 <br /> LCS(1040051-BS2) Prepared&Analyzed 04/14/01 <br /> Purgeable Hydrocarbons as Gasoline 251 500 ug/i 250 100 70-130 <br /> Surrogate a a a-Trifluorotoluene 968 100 968 70-130 <br /> I <br /> vwq <br /> I <br /> I <br /> i <br /> i <br /> I <br /> nota 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 8 of 14 <br />