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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95$34 <br /> (91(5)921-9600 <br /> FAX(916)92 1 100 <br /> Analyticalwww sequoialabs alabs 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 Paul LeCheminant 04/03/01 13 49 <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 916REC Limits RPD Limit Notes <br /> Batch 1040035- EPA 5030B(PIT) <br /> Blank(1040035-BLKI) Prepared&Analyzed 04/02/01 <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-Trti luorotoluene 803 100 803 60-140 <br /> LCS(1040035-BSI) Prepared&Analyzed 04/02/01 <br /> Benzene 101 0 500 ug/l too 101 70-130 <br /> 0ly <br /> ene 102 0 500 100 102 70-130 <br /> lbenzene 103 0 500 100 103 70-130 <br /> Xylenes(total) 31 6 0 500 300 105 70-130 <br /> Methyl tert-butyl ether 868 250 100 868 70-130 <br /> Surrogate a a a-Trifluorotodiene 834 100 834 60-140 <br /> Matrix Spike(1_040035_-MSI) Source S103497-02 Prepared&Analyzed 04/02/01 <br /> Benzene lot 0 500 ug/l 100 ND 101 60-140 <br /> Toluene 102 0 500 100 ND 102 60-140 <br /> Ethylbenzene 102 0 500 10 0 ND 102 60-140 <br /> Xylenes(total) 313 0 500 300 ND 104 60-140 <br /> Methyl tert-butyl ether 932 250 10 0 ND 932 60-140 <br /> Surrogate a a a-Triuorotoluene 102 100 102 60-140 <br /> Matrix Spike Dup(1040035-MSDI) Source 5103497-02 Prepared&Analyzed 04/02/01 <br /> Benzene 102 0 500 ug/1 106 ND 102 60-140 0 985 25 <br /> Toluene 102 0 500 10 0 ND 102 60-140 0 25 <br /> Ethylbenzene 10 2 0 500 too ND 102 60-140 0 25 <br /> Xylenes(total) 312 0 500 300 ND 104 60-140 0 320 25 <br /> Methyl ten-butyl ether 996 250 100 ND 996 60-140 6 64 25 <br /> Surrogate a a a-Trrfluorotoluene 101 100 101 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 5 of 6 <br />