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404 N Wiget Lane <br /> Sequoia Walnut Geek,CA'9%M <br /> (925)98&9600 <br /> FAX(925)%&%73 - <br /> Analytical ' ''~ u°`� °°m <br /> Gettler Ryan,hie -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Former Unocal#2859 Reported <br /> Dublin CA,94568 Project Manager Deanna L Hardmg 15-Jun-00 08 00 <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 Limit Units Level Result a/eREC Limits RPD Limit Notes <br /> Batch OF08002 -EPA 5030B[PIT] <br /> Blank(OFO8O01-BLK1) Prepared&Analyzed 08-Jun-00 <br /> Purgeable Hydrocarbons ND 50 u9/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzem PID , 050 " <br /> Xylenes(total) ND 050 " <br /> Mathyl tart-butyl ethcr ND 25 " <br /> Surrogate aqo-Trifluorotoluene 311 300 104 70-130 <br /> LCs(OF08001-BSI) Prepared&Analyzed-08-Jun-00 <br /> Benzene 169 030 ug/l 200 845 70-130 <br /> Toluene 187 0 so 200 935 70-130 <br /> Ethylbenzene 202 0 50 200 W 101 70-130 �r <br /> Xylenes(total) 610 0 50 600 102 70-130 <br /> Surrogate aaa-Trifluorotoluene 262 300 873 70.130 <br /> Matrix Spike(OF08001-MSI) - Source W006087-14 Prepared&Analyzed 08-Jun-00 <br />—Benzene`_ 17_0 0 50—ug/1--20 0 ND 85 0---70-130 <br /> Toluene 196 0 50 200 ND 930 70-130 <br />�Ethylbenzetie_ _ T_T___ _ 19 4 0 50 "_ — 20 0_ �ND��-97 0-70.130 <br /> xylenes(total) 604 050 " 600 ND 101 70-130 <br /> T Surrogate a a a-Tnfluorntoluene 270 300 900 70-130 - - <br /> Matrix Spike Dup(OF08001-MSD1) Source W006087-14 Prepared&Analyzed 08-Jun-00 <br /> Benzene 166 050 u9/1 200 ND 930 70-130 238 20 <br /> Toluene 18.2 0 50 200 ND 910 70-130 217 20 <br /> Ethylbenzene 194 050 200 ND 970 70-130 0 20 <br /> Xylenes(total) 594 0 50 n600 ND 990 70-130 167 20 <br /> Surrogate µala-Tri luorotoluene 262 3a0 873 70-130 <br /> i <br /> Sequoia Analytical-Walnut Crcek The results in flus report apply to the samples analyzed in accordance with the chain <br /> custody doewnent This analytical report crust be reproduced in its <br /> Page 12 of 18 <br />