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404 N Wlget Lane <br /> Sequoia Walnut Creels 98 94598 <br /> -9600 <br /> 4 a- -N (925)988-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequoialabs corn <br /> swr <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 Chemtnant 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 Lurut Units Level Result %REC Li ruts RPD Limit Notes <br /> Batch 1A09012 -EPA 5030B (PIT] <br /> Blank(1A09012-BLK1) Prepared&Analyzed 02-Jan-01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 <br /> Methyl tent-butyl ether Nb 25 <br /> Surrogate a a a-Trtuorotoluene 318 300 109 70-130 <br /> LCS(1A09012-BSI) Prepared&Analyzed 02-Jan-01 <br /> Benzene 196 050 ug/I 200 930 70-130 <br /> Toluene 194 050 200 970 70-130 <br /> 0ebenzene 205 050 200 103 70-130 <br /> nes(total) 609 050 600 102 70-130 <br /> Surrogate a a a-Trifluorotoluene 294 300 980 70-130 <br /> Matrix Spike(lA09012-MS1) Source W012598-02 Prepared&Analyzed 02-Jan-01 <br /> Benzene 172 050 ug/1 200 ND 860 70-130 <br /> Toluene 185 050 200 064 893 70-130 <br /> Ethylbenzene 189 050 200 ND 940 70-130 <br /> Xvlcnes(total) 56 t 050 600 ND 93 5 70-130 <br /> Surrogate aaa-Trrfluorotoluene 191 300 970 70-130 <br /> Matrix Spike Dup(1A09012-MSD1) Source W012598-02 Prepared&Analyzed 02-Jan-01 <br /> Benzene 175 050 ug/i 200 ND 875 70-130 1 73 20 <br /> Toluene 188 050 200 064 908 70-130 161 20 <br /> Fthylbenzene 189 050 200 ND 945 70-130 0 531 20 <br /> Xylenes(total) 566 050 600 ND 943 70-130 0 887 20 <br /> Surrogate aaa-Trifluorotoluene 295 300 983 70-130 <br /> oia Analytical-Walnut Creek The results to 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 5 of 7 <br />