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Sig Avenue S 4 <br /> Sequoia Sacramento CA 95834 <br /> 4D <br /> (910 921-9600 <br /> 21-0100 <br /> SOW Analytical FAX equ 9abscom <br /> www sequoialabs coin <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 03/26/01 11 30 <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 1030335- EPA 5030B(PIT) <br /> Blank(1030335-BLK1) Prepared&Analyzed 03/24/01 <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-Trifluorotoluene 894 100 894 60-140 <br /> LCS(1030335-BSI) Prepared&Analyzed 03/24/01 <br /> Benzene 947 0 500 ug/l 100 947 70-130 <br /> rene 957 0 500 100 95 7 70-130 <br /> ibenzene 966 0 500 100 966 70-130 <br /> Xylenes(total) 298 0 500 300 993 70-130 <br /> Methyl tert-butyl ether 122 250 too 122 70-130 <br /> Surrogate a a a Trifluorololuene 853 100 853 60-140 <br /> Matrix Spike(1030335-MSI) Source S103350-07 Prepared&Analyzed 03/24/01 <br /> Benzene 962 0 500 ug/l 10 0 ND 962 60-140 <br /> Toluene 988 0 500 100 ND 98 8 60-140 <br /> Ethylbenzene 9 81 0 500 l0 0 ND 98 1 60-140 <br /> Xylenes(total) 29 1 0 500 300 NO 970 60-140 <br /> Methyl tert-butyl ether 119 250 100 ND 119 60-140 <br /> Surrogate a a a-Trtuorotoluene 864 100 864 60-140 <br /> Matrix Spike Dup(1030335-MSDI) Source 5103350-07 Prepared&Analyzed 03/24/01 <br /> Benzene 947 0 500 ug/1 too ND 947 60-140 1 57 25 <br /> Toluene 9 71 0 500 100 ND 971 60-140 l 74 25 <br /> Ethylbenzene 975 0 500 t0 0 ND 975 60-140 0 614 25 <br /> Xylenes(total) 28 8 0 500 300 ND 960 60-140 104 25 <br /> Methyl tert-butyl ether l 1 2 250 10 0 ND 112 60-140 606 25 <br /> Surrogate a a a-Trifluorotoluene 842 100 842 60-140 <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 6 of 7 <br />