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Sequoia 404CA Lane <br /> Walnut Creek CA 94598 <br /> (925198&9600 <br /> FAX <br /> Analytical www seququorlabs alabs c 73 <br /> torts <br /> Crettler Ryan,Inc -Dubhn Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#0187 Reported <br /> Dublin CA,94568 Project Manager P Le Chemmant 27-Dec-00 07 45 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reportmg Spike Source %REC RPD <br /> Analyte Result Lmut Units Level Result %REC Limits RPD Limit Notes <br /> Batch OL19001-EPA 5030B [PIT] <br /> Blank(OL19001-BLKI) Prepared&Analyzed 19-Dec-00 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate aaa-Trr luorotoluene 310 300 103 70-130 <br /> LCS(OL19001-BSI) Prepared&Andlvzed 19-Dec-00 <br /> Benzene 180 050 ug/i 200 900 70-130 <br /> luene 18 4 050 200 920 70-130 <br /> (benzene 19 3 050 200 965 70-130 <br /> ylenes(total) 577 0 50 600 962 70-130 <br /> Surrogate a a a-Tnfluorololuene 280 300 933 70-130 <br /> Matrix Spike(OL19001-MSI) Source W012243-09 Prepared&Analyzed 19-Dec-00 <br /> Benzene 161 050 ug/1 200 ND 805 70-130 <br /> Toluene 168 050 200 ND 840 70-130 <br /> Ethylbenzene 175 050 200 ND 875 70-130 <br /> Xylenes(total) 53 0 050 600 ND 883 70-130 <br /> Surrogate a a a-Tnfluorotoluene 295 300 983 70-130 <br /> Matrix Spike Dup(OL19001-MSD1) Source W012243-09 Prepared&Analyzed 19-Dec-00 <br /> Benzene 157 0 50 ug/l 200 ND 78 5 70-130 2 52 20 <br /> Toluene 167 050 200 ND 835 70-130 0 597 20 <br /> Ethylbenzene 176 050 200 ND 880 70-130 0 570 20 <br /> Xylenes(total) 532 050 600 ND 887 70-130 0 377 20 <br /> Surrogate a a a-Trifluorotoluem 282 300 940 70-130 <br /> uoia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Tits analyltcal report must be reproduced in its entirety <br /> Page 4 of 6 <br />