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4DSequoia 404 N Wiget Lane <br /> Walnut Creek, CA 94598 <br /> 4r� - <br /> (925) 988-9673 <br /> 8-9600 <br /> Analytical <br /> FAX(925) 9$ <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#5886 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 16-Dec-99 09 01 <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 %REC Limits RPD Limit Notes <br /> Batch 9LO7002 Prepared 07-Dec-99 Using EPA 50308 [PIT] <br /> LCS(9L07002-BSI) <br /> Benzene 196 050 ug/l 200 980 70-130 <br /> Toluene 197 050 200 985 70-130 <br /> Ethylbenzene 197 050 200 985 70-130 <br /> Xylenes(total) 613 050 600 102 70-130 <br /> Surrogate aaa-Trrfluorotoluene 304 300 101 70-130 <br /> Matrix Spike(9L07002-MSI) Source W912007-11 <br /> Benzene 188 050 ug/l 200 ND 940 70-130 <br /> Toluene 190 050 200 ND 930 70-130 <br /> Ethylbenzene 195 050 200 ND 975 70-130 <br /> Xylenes(total) 588 050 600 ND 980 70-130 <br /> Wale a a a-Trifluorotoluene 288 300 960 70-130 <br /> Matrix Spike Dup(9L07002-MSD1) Source W912007-11 <br /> Benzene 199 050 ug/l 200 ND 995 70-130 568 20 <br /> Toluene 201 030 200 ND 101 70-130 363 20 <br /> Ethylbenzene 202 050 200 ND 101 70-130 353 20 <br /> Xylenes(total) 619 050 600 ND 103 70-130 498 20 <br /> Surrogate a a a-Di luorotoluene 300 300 100 70-130 <br /> uoia Analyucal-Walnut Creek The results in this report apply to the saanples analyzed to accordance with the chain of <br /> custody document This awlyhcal report must be reproduced rn t is entirety <br /> �TTUTaAnneegleyv, ojec anager Page 23 of 27 <br />