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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> 45)—4 (916)921-96W <br /> Analytical lAx(916) 00 <br /> www sequoialabs alabs com <br /> OVF — <br /> Gettler-Rvan-Dublin Project Unocal 0187, Stockton CA <br /> 6747 Sierra Court Ste l Project Number C-Sparge Test Reported <br /> Dublin CA 94568 Project Manager P LeCheminant 01/05/01 09 51 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source 9'6REC RPD <br /> Anaivte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1010043- EPA 5030E(P/T) <br /> Blank(1010043-BLKI) _ Prepared&Analyzed 01/04/01 <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 tent-butyl ether ND 250 " <br /> Surrogate a a a-Triuorotoluene 866 100 866 60-140 <br /> LCS(1010043-BSI) Prepared&Analyzed 01/04/01 _ <br /> Benzene 986 0 500 ug/l_ loo 986 70-130 <br /> 0yDene 994 0 500 100 994 70-130 <br /> lbenzene 101 0 500 100 101 70-130 <br /> Xylenes(total) 299 0 500 300 99 7 70-130 <br /> Methyl tent-butyl ether 102 250 100 102 70-130 <br /> Surrogate a a a-Triuorotoluene 942 100 942 60-140 <br /> Matrix Spike(1010043-MSI) _ Source S012374-02 Prepared 01/04/01 Analyzed 01/05/01 <br /> Benzene 9 79 0 500 ug/l 100 ND 979 60-140 <br /> Toluene 100 0500 100 ND t00 60-140 <br /> Ethylbenzene 983 0 500 loo ND 983 60-140 <br /> Xylenes(total) 297 0 500 300 ND 990 60-140 <br /> Methyl tert-butyl ether 941 250 10 0 ND 94 1 60-140 <br /> Surrogate a a a-Trifluorotoluene 841 100 841 60-140 <br /> Matrix Spike Dup(1010043-MSDI) Source 5012374-02 Prepared 01/04/01 Analyzed 01/05/01 _ <br /> Benzene 989 0 500 ug/l 100 ND 989 60-140 1 02 25 <br /> Toluene 102 0 500 100 ND 102 60-140 1 98 25 <br /> Ethylbenzene 9 93 0 500 10 0 ND 99 3 60-140 1 01 25 <br /> Xylenes(total) 298 0 500 300 ND 993 60-140 0 336 25 <br /> Methyl tert-butyl ether 9 78 250 100 ND 978 60-140 386 25 <br /> Surrogate a s a-Trtfluorotoluene 904 100 90 4 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 5 <br />