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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX(9t6)92 1 100 <br /> Analytical www sequoialabs laUs corn t <br /> Gettler-Ryan- Dublin Project Unocal 0187, Stockton CA <br /> 6747 Sierra Court Ste J Project Number NIA Reported <br /> Dublin CA 94568 Project Manager P LeChentinant 02/02/01 17 42 <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 1010262-EPA 5030B(PIT) <br /> Blank(1010262-BLK1) Prepared&Analyzed 01/25/01 <br /> Purgeable Hydrocarbons ND 500 ug/I <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-TriJluorotoluene 9 16 100 916 60-140 <br /> LCS(1010262-BSI) Prepared&Analyzed 01/25/01 <br /> Benzene 881 0 500 ugll 100 88 1 70-130 <br /> uene 878 0 500 'i too 878 70-130 <br /> ylbenzene 873 0 500 too 873 70-130 <br /> Xylenes(total) 267 0 500 300 890 70-130 <br /> Methyl tert-butyl ether 851 2 50 1 D 0 85 1 70-130 <br /> Surrogate a a a-Triuorotoluene 910 100 910 60-140 <br /> Matrix Spike(1010262-MSI) Source 5101331-09 Prepared&Analyzed 01/25/01 <br /> Benzene 9 25 0 500 ug/l 100 ND 925 60-140 <br /> Toluene 923 0 500 100 ND 923 60-140 <br /> Ethylbenzene 924 0 500 100 ND 924 60-140 <br /> Xylenes(total) 283 0 500 300 ND 943 60-140 <br /> Methyl tert-butyl ether 668 2 50 l0 0 ND 668 60-140 <br /> Surrogate a a a-Triuorotoluene 966 100 966 60-140 <br /> Matrix Spike pup(1010262-MSDI) Source S101331-09 Prepared&Analyzed 01/25/01 <br /> Benzene 900 0 500 ug/I 100 ND 900 60-140 2 74 25 <br /> Toluene 900 0 500 l0 0 ND 900 60-140 2 52 25 <br /> Ethylbenzene 896 0 500 100 ND 896 60-140 308 25 <br /> Xylenes(total) 277 0 500 300 ND 923 60-140 2 14 25 <br /> Methyl tert-butyl ether 829 250 too ND 829 60-140 21 5 25 <br /> Surrogate a a a-Triuorotoluene 908 100 908 60-140 <br /> equoia 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 8 <br />