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4D 89SakAvenue <br /> cameoCA983 <br /> (916)921-9600 <br /> FAX(916)921-0 t00 <br /> Ow Analytical www sequoialabsalabs corn <br /> Gettler-Ryan- Dublin Project Unocal 0187 Stockton,CA <br /> 6747 Sierra Court,Ste 1 Project Number C-Sparge Test Reported <br /> Dublin CA 94568 Project Manager P LeChemtnant 01/16/01 15 29 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1010151 -EPA 5030B PIT) <br /> LCS(1010151-BSI) Prepared&Analyzed 01/16/01 <br /> Benzene 976 0 500 ug/l too 97 6 70-130 _ <br /> Toluene too 0 500 loo 100 70-130 <br /> Ethylbenzene 993 0 500 too 993 70-130 <br /> Xylenes(total) 29 8 0 500 300 993 70-130 <br /> Methyl tert-butyl ether 120 250 100 120 70-130 <br /> Surrogate a a a-Trifluorotoluene 898 100 898 60-140 <br /> qequota Analytical-Sacramento The results to this report apply to the samples analyzed to accordance wah the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> -- — Page 5 of 6 <br />