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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento to 95834 <br /> (916)921-9600 <br /> FAX(916)92 1-0100 <br /> dw Analytical www sequoiaEabs corn <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 P LeCheminant 02/07/01 14 38 <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 1020044-EPA 5030E PIT <br /> Blank(1020044-BLKI) Prepared&Analyzed 02/06/01 <br /> Purgeable Hydrocarbons ND 500 ugfl <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethyibenzene ND 0 500 <br /> Xylenes(total) ND 0 500 " <br /> Methyl tert-butyl ether ND 250 " <br /> Surrogate a a a-Trifluorotoluene 914 100 924 60-140 <br /> LCS(1020044-BSI) Prepared&Analyzed 02/06/01 <br /> Benzene 8 73 0 500 ug/1 10 0 873 70-130 <br /> 'M ne 8 78 0 500 100 878 70-130 <br /> ytb.zene 884 0 500 too 884 70-130 <br /> Xyienes(total) 26 4 0 500 300 890 70-130 <br /> Methyl tent-butyl ether 8 59 2 50 100 859 70-130 <br /> Surrogate a a a-Trifluorotoluene 945 100 94 5 60-140 <br /> Matrix Spike(1020044-MS1) Source S102048-07 Prepared&Analyzed 02/06/01 <br /> Benzene _ 944 0 500 ug/l 100 ND 944 60-140 <br /> Toluene 9 62 0 500 l0 0 ND 962 60-140 <br /> Ethylbenzene 9 66 0 500 100 ND 966 60-140 <br /> Xylenes(total) 28 9 0 500 300 ND 963 60-140 <br /> Methyl tert-butyl ether 8 38 2 50 100 ND 83 8 60-140 <br /> Surrogate a a a-Trihuoroioluene 103 100 103 60-140 <br /> Matrix Spike Dup(1020044-MSD1) Source S102048-07 Prepared&Analyzed 02/06/01 <br /> Benzene 959 0 500 ug/] 10 0 ND 95 9 60-140 153 25 <br /> Toluene 9 75 0 500 100 ND 975 60-140 l 34 25 <br /> Ethylbenzene 974 0 500 too ND 97 4 60-140 0 825 25 <br /> Xylenes(total) 292 0 500 300 ND 973 60-140 l 03 25 <br /> Methyl tert-butyl ether 8 63 250 too ND 863 60-140 2 94 25 <br /> Surrogate a a a-Trtfluorotoluene 985 100 985 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 in its entirety <br /> Page 4 of 7 <br />