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404 N Wlget-Lane <br /> Walnut Creek,CA 94598 <br /> b_ Sequoia (9zs)938-9600 <br /> FAX(9TS)_9$8-%73 _ <br /> �,� Analytical "w'"�'"° �;n <br /> Gettler Ryan,Inc -Dublin _ Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal# 1205 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 08-Feb-010755 <br /> Total Purgeable Hydrocarbons (C6-C1.2), BTEX and MTBE by DHS LUFT - Quality Control <br /> __$equoia Analytical -Walnut Creek _ T <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Lurnts RPD Lunit Notes <br /> Batch 1A19001-EPA 5030B[PIT] <br /> Black(1A19001 BLK1) Prepared&Analyzed 19-Jan-01 <br /> Purgeable Hydrocarbons ND 50 ug/1 <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 ND 25 " <br /> Surrogate qa,a-Tri luorotoluerre 307 300 102 - 70-130 <br /> LCS(1A19001-BS1) Prepared&Analyzed 19-Jan 01 <br /> Benzene 184 0 50 ug/1 200 920 70-130 <br /> Toluene 194 050 200 97 0 70-130 <br /> Ethylbenzene 206 050 200 103 70-130 <br /> Xylancs(total) 615 050 600 103 70-130 <br /> Surrogate aga-Tn,Jluorotoluene 28 7 300 9S7 70-130 <br /> Matra Spike(lA19001 MSI) Source W101185-05 Prepared&Analyzed 19-Jan-01 <br /> Benzene 181 0 50 ug/1 200 ND 905 70-130 <br /> Toluene 201 0 50 " 200 060 975 70-130 <br /> Ethylbenzene 20 8 0 50 200 ND 104 70-130 <br /> Xylenes(total) 63 0 0 50 600 074 104 70-I30 <br /> Surrogate t%aa-Tnfluorotoluene 319 300 106 70-130 <br /> Matrix Spike Dup(1A19001-MSDJ) Source W101185-05 Prepared&Analyzed 19-Jan-01 <br /> Benzene 189 050 ug/1 200 ND 945 70-130 432 20 <br /> Toluene 208 0 50 200 060 10I 70-130 342 20 <br /> Ethylbenzene - 213 050 200 ND 108 70-130 331 20 <br /> Xylenes(total) 65 0 030 600 074 107 70-130 3 13 20 <br /> Surrogate aa,a-Tn,Jluorotoluene 333 300 111 70-130 <br /> Sequoia Analytltal-Walnut Creel{ The results in ibis report apply to the samples anal}aed in accordance with the chain of <br /> custody document Thos analytical report must be reproduced to its entr0 <br /> --- Page-9-of-14— <br /> .a� <br />