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404 N Wiget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> 4 (925)988-9600 <br /> ID ID Analytical FAX(925)988-9673 <br /> Aer Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite 7 Pro)ectNumber Tosco(Unocal)4 6981 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 23-Nov-99 16 42 <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 Ltnut Units Level Result %REC Lin uts RPD Limit Notes <br /> Batch 9KO5001 Prepared 05-Nov-99 Using EPA 5030B [Pffl <br /> Blank(9K05001-BLKI) <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 25 " <br /> Surrogate iz a a-Tnfluorotoluene 260 300 867 70130 <br /> LCS(9K05001-BSI) <br /> Benzene 196 050 ug/l 200 980 70-130 <br /> Toluene 180 050 200 900 70-130 <br /> Etlezenti 205 050 200 103 70-130 <br /> \ylenes(total) 657 050 600 109 70-130 <br /> Surrogate aa a-Tnfluorotoluerie 273 300 910 70-130 <br /> Matrix Spike(9K05001-MSI) Source W910532-03 <br /> Benzene 202 050 ug/I 200 ND 101 70-130 <br /> rolu,ne 186 050 200 ND 930 70-130 <br /> Ethylbenzene 212 050 200 ND 106 70-130 <br /> \vlen'%(cowl) 666 050 600 ND 111 70 130 <br /> Surrogate a a a-Trri luorotoluerre 256 300 853 70-130 <br /> Matra Spike Dup (9K05001-MSD1) Sourt_e W910532-03 <br /> Benzene 20 4 050 ug/I 200 ND 102 70-130 0 985 20 <br /> loluen, 189 050 200 ND 940 70-130 1 07 20 <br /> Ethylbenzene 21 l 050 200 ND 106 70-130 0 473 20 <br /> \N l,n,ti(tot ti) 678 050 600 ND 113 70-130 179 20 <br /> Surrogate a a a-Trri luorotolut.rie 261 300 870 70-130 <br /> SW Analytical -Walnut Creek The resull s m thr s report apply to rhe vwnple r analysed i n accordmrce with the chran of <br /> cuslody document This analyncal report must be reproduced in its enarety <br /> T <br /> C eg a rojelt�-Iws <br /> Page 14 of 19 <br />