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1551 Industrial Road <br /> Sequoia San Carlos CA 94,070-4111 <br /> (650) 232-9600 <br /> DAnalytical FAX(650) 2 32-9612 <br /> Gerlier-Ryan/Geostrategies(l) Project Tosco(5) Sampled 1/31/00 <br /> 6747 Sierra Court,Suite D Proloct Number Pacific Ave Received 1/31/00 <br /> Dublin,CA 94568 Project Manager Steve Carter Reported 2/3/00 <br /> Total Purgeable Hydrocarbons(C6-C12)and BTEX by DHS LUFT/Quality Control <br /> Sequoia Analytical-San Carlos <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0020001 Date Prepared 2/1100 Extraction Method EPA 5030B [PIT] <br /> Blank 0020001-BLKI <br /> Purgeable Hydrocarbons as Gasoline 2/1/00 ND ug/1 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) It ND 0 500 <br /> Surrogate a a a-Triuorotoluene If10 0 8 79 600-140 879 <br /> LCS 0020001-BSI <br /> Benzene 2/l/00 100 9 85 ug/1 700-130 985 <br /> Toluene 100 9 12 " 700-130 91 2 <br /> Ethylbenzene 100 933 700-130 933 <br /> Xylenes(total) _ 300 _ _ 283 700-130 943 <br /> rrogate a,a,a-Trifluorotoluene 100 882 600-140 88 2 <br /> S 0020001-BS2 <br /> Purgeable Hydrocarbons as Gasoline 2/l/00 250 213_ ug/1 700-130 852 <br /> Surrogate a a,a-Trtfluorotoluene 11 10 0 995 60 0-140 995 <br /> _Matrix Spike 0020001-MSI L001205-13 <br /> Purgeable Hydrocarbons as Gasoline 2/1/00 250 ND 225 ug/1 600-140 900 <br /> Surrogate a,a,a-Trifluorotoluene 1110 0 867 or600-140 86 7 <br /> Matrix Spike Du p 0020001-MSDI L001205-13 <br /> Purgeable Hydrocarbons as Gasoline 2/1/00 250 ND 218 ug/1 600-140 872 250 3 16 <br /> Surrogate a a a-Trifluorotoluene 100 851 600-140 851 <br /> uoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> F <br /> Page 4 of 6 <br />