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Sequoia 819 Sacramento <br /> Avenue Suite <br /> Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX 92 1 IDD <br /> Analytical www sequoiatabs <br /> eom <br /> Gettler-Ryan-Dublin Project Unocal 0187,Stockton,CA <br /> 6747 Sierra Court,Ste 7 Pro3ect Number C-Sparge Test Reported <br /> Dublin CA,94568 Project Manager P LeCheminant 02/22/01 18 49 <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 1020189-EPA 5030B(PIT} <br /> Blank(1020189-BLK1) Prepared&Analyzed 02/16/01 <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 2 50 <br /> Surrogate a a a-TriJluorotoluene 952 100 95 2 60-140 <br /> LCS(1020189-BSI) Prepared&Analyzed 02/16/01 <br /> Benzene 962 0 500 ug/l l0 0 962 70-130 <br /> *1 ene 9 98 0 500 100 998 70-130 <br /> ylbenzene 102 0 500 100 102 70-130 <br /> Xylenes(total) 31 4 0 500 300 105 70-130 <br /> Methyl tert-butyl ether 101 250 100 101 70-130 <br /> Surrogate a a a-TriJluorotoluene 947 " 100 94 7 60-140 <br /> Matnx Spike(1020189-MSI) Source 5102210-03 Prepared&Analyzed 02/16/01 <br /> Benzene 953 0 500 ug/I t 0 0 ND 95 3 60-140 <br /> Toluene 9 83 0 500 100 ND 98 3 60-140 <br /> Ethylbenzene 101 0 500 100 ND 101 60-140 <br /> Xylenes(total) 31 1 0 500 300 ND 104 60-140 <br /> Methyl tent-butyl ether 1 1 7 250 100 ND 117 60-140 <br /> Surrogate a a a-Trac luorotoluene 105 100 105 60-140 <br /> Matrix Spike Dup(1020189-MSD1) Source S102210-03 Prepared&Analyzed 02/16/01 <br /> Benzene 950 0 500 ug/l 100 ND 950 60-140 0 315 25 <br /> Toluene 988 0 500 10 0 ND 98 8 60-140 0 507 25 <br /> Ethylbenzene 997 0 500 too ND 997 60-140 1 30 25 <br /> Xylenes(total) 309 0 500 300 ND 103 60-140 0 645 25 <br /> Methyl tert-butyl ether 124 250 100 ND 124 60-140 581 25 <br /> Surrogate a a a-Trifluorotoluene 105 100 105 60-140 <br /> Ah <br /> quota 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 5 of 7 <br /> per <br />