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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> (925)988-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequoialabs corn <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#0187 Reported <br /> Dublin CA,94568 Project Manager P Le Chemmant 19-Jan-01 07 47 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Linut Units Level Result %REC Linuts RPD Lunt Notes <br /> Batch IA09013-EPA 5030B [PIT] <br /> Blank(1A09013-BLKI) Prepared&Analyzed 02-Jan-01 <br /> Purgeable H}drocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl Cert-butvl ether ND 25 " <br /> Surrogate a a a-Tnfluorotoluene 399 300 133 70-130 S-03 <br /> LCS(IA09013-BSI) Prepared&Analyzed 02-Jan-01 <br /> Benzene 173 050 ug/l 200 865 70-130 <br /> Toluene 173 050 200 865 70-t30 <br /> lbenzene 171 050 i; 200 855 70-130 <br /> encs(total) 508 050 600 847 70-130 <br /> Surrogate a aa-Trifluorotoluene 278 300 92 7 70-130 <br /> Matrix Spike(1A09013-MSI) Source W012587-03 Prepared&Analyzed 02-Jan-01 <br /> Benzene 169 050 ug/l 200 ND 845 70-130 <br /> Toluene 176 050 200 070 845 70430 <br /> Ethylbenzene 170 050 200 ND 850 70-130 <br /> Xylenes(total) 508 0 50 600 ND 847 70-130 <br /> Surrogate a a a-Tnfluorotoluene 285 300 950 70-130 <br /> Matrix Spike Dup (1A09013-MSD1) Source W012587-03 Prepared&Analyzed 02-Jan-01 <br /> Benzene 178 050 ug/l 200 ND 890 70-130 5 19 20 <br /> Toluene 18 2 050 200 070 875 70-130 335 20 <br /> Ethylbenzene 176 050 200 ND 880 70-130 347 20 <br /> Xylenes(total) 52 2 050 600 ND 870 70-130 272 20 <br /> Surrogate aaa-Tnfluorotoluene 292 300 973 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 This analytical report must be reproduced in its entirety <br /> Page 6 of 7 <br />