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4 <br /> 0 <br /> Gettler-Ryan/Geostrategies(l) Project Tosco(1) <br /> 6747 Sierra Court,Suite 3 Project Number Tosco SS44409 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 Larmts RPD Limit Notes <br /> Batch 1040051 -EPA 5030B(PIT') <br /> LCS(1040051-BS3) Prepared&Analyzed 04/16/01 <br /> Bene 890 0 500 ug/l 100 890 70-130 <br /> Toluene 8 83 0 500 100 883 70-130 <br /> Ethylbenzene 879 0 500 " ]0 0 879 70-130 <br /> Xylenes(total) 264 0 500 " 300 880 70-130 <br /> Surrogate a a a-Trifluorotoluene 104 100 104 70-130 <br /> LCS(1040051-BS4) Prepared&Analyzed 04/16/01 <br /> Purgeable Hydrocarbons as Gasoline 269 500 u811 250 108 70430 <br /> Surrogate a a a-Trifluorotoluene 983 100 983 70-130 <br /> Matrix Spike(1040051-MSI) Source L104036-02 Prepared&Analyzed 04/14/01 <br /> Benzene 965 0 500 ug!] too ND 965 60-140 . <br /> Toluene 947 0 500 too ND 947 60-140 <br /> Ethylbenzene 953 0 500 too ND 953 60-140 <br /> Xylenes(total) 288 0 500 300 ND 960 60-140 <br /> Surrogate a a a-Trifluorotoluene 859 100 859 70-130 <br /> Matrix Spike Du p(1040051-MSD1) Source L104036-02 Prepared&Analyzed 04/14/01 <br /> Benzene 901 0 500 ug/l 10 0 ND 90 1 60-140 686 25 <br /> 'toluene 886 0 500 ]0 0 ND 88 6 60-140 666 25 <br /> Ethylbenzene 875 0 500 " too ND 875 60-140 853 25 <br /> Xylenes(total) 262 0 500 30 0 ND 87 3 60-140 945 25 <br /> Surrogate a a,a-Trrfluorotoluene 882 100 88 2 70-130 <br /> Batch 1040059-EPA 5030B (PIT <br /> Blank(1040059-BLKI) Prepared&Analyzed 04/18/01 <br /> Purgeable Hydrocarbons as Gasolme ND 500 ugn <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzene ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tent-butyl ether --ND= 504--" - <br /> Surrogate a a a-Tris luorotoluene 748 100 748 70-130 <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed to accordance with the chain MW <br /> custody document This analytical report mast be reproduced in its entirety <br /> Page 9 of 14 <br />