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404 N Wlget Lane <br /> Sequoia Wa[nutCreek,�46 0 <br /> FAX(925)988-9673 <br /> Analytical www sequolalab5 oorn <br /> ttler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sienna Court Sulte J Project Number Unocal#0187 Reported <br /> Dublun CA,94568 Project Manager Deanna L Harding 22-Jun-00 07 41 <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 Lunn Units Level Result %REC Lmuts RPD Lnwt Notes <br /> Batch OF19002-EPA 5030B [P/TJ <br /> Blank(OF19002-BLK1) Prepared&Analyzed 19-Jun-00 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 030 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 25 " <br /> Surrogate aaa-Tnfluoroioluene 191 300 970 70-130 <br /> LCS (OF19002-BSI) Prepared&Analyzed 19-Jun-00 <br /> Benzene 16 9 050 ug/l 200 845 70-130 <br /> Toluene 184 050 200 920 70-130 <br /> benzene 202 050 20 0 I01 70-130 <br /> es(total) 609 050 600 101 70-130 <br /> Surrogate aaa-Tnfluororoluene 267 " 300 890 70-130 <br /> Matrix Spike(OF19002-MSI) Source W006190-03 Prepared&Analyzed 19-Jun-00 <br /> Benzene 169 050 ug/1 200 ND 84 5 70-130 <br /> Toluene 185 050 200 ND 925 70-130 <br /> Ethylbenzene 16 6 050 200 ND 830 70-130 <br /> Xylenes(total) 616 050 600 ND 103 70-130 <br /> Surrogale a as-Tri luorololuene 15 6 300 853 70.130 <br /> Matnx Sptke Dup (OF19002-MSD1) Source W006190-03 Prepared&Analyzed 19-Jun-00 <br /> Benzene 155 0 50 ugA 200 ND 775 70-130 864 20 <br /> Toluene 175 050 200 ND 875 70-130 556 20 <br /> Ethylbenzene 196 050 200 ND 98 0 70-130 166 20 <br /> Xylenes(total) 599 0 50 600 ND 998 70-130 2 80 20 <br /> Surrogate aaa-Tnfluororoluene 162 300 873 70-130 <br /> W <br /> oia AnalyUcal-Walnut Creek The results m chis report apply to the samples analyzed in accordance with the charm of <br /> custody documera Tlas analytical report must be reproduced in its enemy <br /> Page 8 of 12 <br />