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404 N Wiget Lane <br /> Sequoia walnut Greek CA 94590 <br /> (925)988-9600 <br /> FAX(925)988-9673 <br /> Analytical '"'"'" ud�a*ODM <br /> Ryan,lnc -Dublin Project Unocal <br /> 6747 Siena Court Suite J Project Number Unocal#0123 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 20-Jul-0011 14 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %RPC RPD <br /> Analyte Result LInut Units Level Result %REC Limits RPD Lieut Notes <br /> Batch OF28002-EPA 5030B[Prfl <br /> LCS(OF28002-BSI) Prepared&Analyzed 28-Jun-00 <br /> Benzene 182 050 ug/l 200 910 70-130 <br /> Toluene 188 050 200 940 70-130 <br /> Ethylbenzene 196 050 200 980 70-130 <br /> Xylenes(total) 584 050 600 973 70-130 <br /> Surrogate Aga-Trlfluorotduene 28.9 300 96.3 70-130 <br /> LCS Dup(OF28002-BSD1) Prepared&Analyzed 28-Jun-00 <br /> Benzene 183 030 u94 200 915 70-130 0 548 20 <br /> Toluene 195 050 200 975 70-130 366 20 <br /> Ethylbenzone 206 050 " 200 103 70.130 498 20 <br /> Xylenes(total) 62.2 050 600 104 70.130 630 20 <br /> Surrogate aaa-Tnfhrorotohrene 175 300 917 70-130 <br /> Okch OF29002-EPA 5030B[PIT] <br /> Blank(OF29002-BLKl) Prepared&Analyzed 29-Jun-00 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbmzane ND 050 " <br /> Xylenes(tow) ND 050 " <br /> Methyl tartrbutyl other ND 25 " <br /> Surrogate a aa-Tnfluarotoluene 307 300 102 70-130 <br /> LCS(OF19002-BSI) Prepared&Analyzed 29-Jun-00 <br /> Botuene 165 050 ug/1 200 825 70-130 <br /> Tohneno 171 050 200 855 70-130 <br /> E%ylbenzene IM 050 200 920 70-130 <br /> Xylenes(total) 533 050 600 88.8 70-130 <br /> Surrogate a ga-Triluor+otoluene 281 300 937 70-130 <br /> t5QuO18 Analytical-Walnut Creek The results in thea report apply to the samples a nal)%ed in accordance with the chain of <br /> custody document.This a afAcal report must be reproduced in its emirety <br /> Page 13 of 20 <br />