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Sequoia 8l9 Striker Avenue Suite <br /> Sacramento CA 958344 <br /> 4D <br /> (9 16)921-9600 <br /> Analytical <br /> FAX equo alabs921 c 00 <br /> www set}uolalabs 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 03/26/0I 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 1030294- EPA 5030B(PIT) <br /> Blank(1030294-BLK1) Prepared&Analyzed 03/20/01 <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 9 70 100 970 60-140 <br /> LCS(1030294-BSI) Prepared&Analyzed 03/20/01 <br /> Benzene 903 0 500 ug/l l0 0 903 70-130 <br /> 0,yene 942 0 500 l0 0 942 70-130 <br /> lbenzene 9 50 0 500 100 950 70-130 <br /> Xylenes(total) 286 0 500 300 953 70-130 <br /> Methyl tert-butyl ether 857 250 100 85 7 70-130 <br /> Surrogate a a a-Tris luorotoluene 8 73 100 873 60-140 <br /> Matrix Spike(1030294-MSI) Source S103226-03 Prepared&Analyzed 03/20/01 <br /> Benzene 967 0 500 ug/l 100 ND 967 60-140 <br /> Toluene 10 0 0 500 100 ND 100 60-140 <br /> Ethylbenzene 10 4 0 500 100 ND 104 60-140 <br /> Xylenes(total) 31 1 0 500 300 ND 104 60-140 <br /> Methyl tert-butyl ether 847 250 100 ND 847 60-140 <br /> Surrogate a a a-Tris luorotoluene 10 4 100 104 60-140 <br /> Matrix Spike Dup(1030294-MSD1) Source S103226-03 Prepared&Analyzed 03/20/01 _ <br /> Benzene 940 0 500 ug/l 10 0 ND 940 60-140 2 83 25 <br /> Toluene 975 0 500 10 0 ND 975 60-140 2 53 25 <br /> Ethylbenzene 101 0 500 10 0 ND 101 60-140 2 93 25 <br /> Xylenes(total) 302 0 500 300 ND 101 60-140 294 25 <br /> Methyl tert-butyl ether 837 250 10 0 ND 83 7 60-140 1 19 25 <br /> Surrogate a a a-Triffuorotoluene 989 100 989 60-140 <br /> -'Sequoia 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 to its entirety <br /> Page 4 of 7 <br /> r�i _ <br />