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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C 958-44 <br /> (916)922 1-9600 <br /> Analytical FAX equo atabs921 C 00 <br /> •� � www sequolalabs com � <br /> Gettler-Ryan-Dublin Project Unocal 0187, Stockton, CA <br /> 6747 Sierra Court Ste J Project Number C-Sparge Test Reported <br /> Dublin CA, 94568 Project Manager Paul LeCheminant 06/15/01 16 56 <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 1 F12003-EPA 5030B P/T <br /> Blank(1F12003-BLK1) Prepared&Analyzed 06/12/01 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl ten-butyl ether ND 25 <br /> Surrogate a a a-TrifTuorotoluene 289 300 963 70-130 <br /> Blank(IF12003-BLK2) Prepared&Analyzed 06/13/01 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> lazene ND 050 <br /> uene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Tr fluorotoluene 349 300 116 70-130 <br /> Blank(1F12003-BLK3) Prepared&Analyzed 06/15/01 _ <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 050 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Surrogate a a a-Triuorotoluene 301 300 100 70-130 <br /> LCS(IF12003-BSI) Prepared&Analyzed 06/12/01 <br /> Benzene 22 1 050 ug/l 200 110 70-130 <br /> Toluene 202 050 200 101 70-130 <br /> Ethylbenzene 194 0 50 200 970 70-130 <br /> Xylenes(total) 63 6 050 600 106 70-130 <br /> Surrogate a a a-Triuorotoluene 28 9 300 963 70-130 <br /> *ecqluoia Analytical-Sacramento The results in 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 4 of 6 <br />