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Suite 8 <br /> Sequoia 819StrikerAvenue 95834 <br /> 5aaamento CA 95834 <br /> (916)921-96M <br /> FAX(916)921-0100 <br /> Analytical www sequoialabscorn <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 0901101 15 19 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %FEC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1040327- EPA 5030B(P/T) <br /> Blank(1040327-BLKI) Prepared&Analyzed 04/26/01 <br /> Purgeable Hydrocarbons ND 500 ug/l <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND 0 500 <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND 250 " <br /> Surrogate a a a Triuorotoluene 113 100 113 60-140 <br /> LCS(1040327-BSI) Prepared&Analyzed 04/26/01 <br /> Benzene 105 0 500 ug/1 100 105 70430 <br /> ene 107 0 500 100 107 70-130 <br /> lbenzene 106 0 500 100 106 70-130 <br /> Xylenes(total) 320 0 500 300 107 70-130 <br /> Methyl ter(-butyl ether 112 250 100 112 70-130 <br /> Surrogate aaa-Triuorotoluene 10 7 100 107 60-140 <br /> Matrix Spike(1040327-MSI) Source 5104353-03 Prepared&Analyzed 04/26/01 _ <br /> Benzene 103 0 500 UO 100 ND 103 60-140 <br /> Toluene 10 2 0 500 100 ND 102 60-140 <br /> Ethylbenzene 10 2 0 500 100 ND 102 60-140 <br /> Xylenes(total) 303 0 500 300 ND 101 60-140 <br /> Methyl tert-butyl ether 104 250 100 ND 104 60-140 <br /> Surrogate a a a-Triuorotoluene 106 100 106 60-140 <br /> Matrix Spike Dup(1040327-MSD1) Source S104353-03 Prepared&Analyzed 04/26/01 <br /> Benzene 103 0 500 ugll 100 ND 103 60-140 0 25 <br /> Toluene 10 2 0 500 too ND 102 60-140 0 25 <br /> Ethylbenzene 10 2 0 500 too ND 102 60-140 0 25 <br /> Xylenes(total) 30 5 0 500 300 ND 102 60-140 0 658 25 <br /> Methyl tert-butyl ether 10 6 250 100 ND 106 60-140 190 25 <br /> Surrogate a a,a-Trifluorotoluene 108 100 108 60-140 <br /> quota Analytical- Sacramento The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 4 of 7 <br />