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Sequoia 819 Striker Avenue 958 <br /> Sacramento CA 958344 <br /> (916)921-9600 <br /> Analytical FAX equo alabs c 00 <br /> www sequotalabs[om <br /> b <br /> Gettler-R an-Dublin Project Unocal 0187, Stockton,CA <br /> Y <br /> 6747 Sierra Court,Ste J Project Number C-Sparge Test deported <br /> Dublin CA,94568 Project Manager P LeChemmant 03/02/01 17 05 <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 urnit Units level Result %REC Limits RPD Lima Notes <br /> Batch 1030027-EPA 5030B PIT <br /> Blank(1030027-BLKI) Prepared&Analyzed 03/01/01 <br /> Purgeable Hydrocarbons PID 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-Trifluorotoluene 121 100 121 60-140 <br /> LCS(1030027-BSI) _ Prepared&Analyzed 03/01/01 _ <br /> Benzene 700 0 500 ug/l 100 700 70-130 <br /> 1ene 867 0 500 100 867 70-130 <br /> +Ibenzene 965 0 500 l0 0 965 70-130 <br /> Xylenes(total) 300 0 S00 300 100 70-130 <br /> Methyl tert-butyl ether 788 2 50 10 0 788 70-130 <br /> Surrogate a a a-Trifluorotoluene 11 7 /00 117 60-140 <br /> Matnx Spike(1030027-MSI) Source S102348-06---Prepared 03/01/01 Analyzed 03/02/01 <br /> Benzene 553 0 500 ug/l 100 ND 55 3 60-140 Q-02 <br /> Toluene 7 65 0 500 100 ND 765 60-140 <br /> Ethylbenzene 887 0 500 100 ND 887 60-140 <br /> Xylenes(total) 277 0 500 300 ND 92 3 60-140 <br /> Methyl tert-butyl ether 657 250 100 ND 657 60-140 <br /> Surrogate a a a-Trifluorotoluene 110 100 110 60-140 <br /> Matrix Spike Dup(1030027-MSD1) Source S102348-06 _Prepared 03/01/01 Analyzed 03/02/01 <br /> Benzene 561 0 500 ug/I 100 ND 56 l 60-140 144 25 Q-02 <br /> Toluene 780 0 500 100 ND 78 0 60-140 l 94 25 <br /> Ethylbenzene 901 0 500 100 ND 901 60-140 157 25 <br /> Xylenes(total) 280 0 500 300 ND 933 60-140 1 08 25 <br /> Methyl ten-butyl ether 6 14 250 100 ND 614 60-140 677 25 <br /> Surrogate a a a-Trifluorotoluene 112 _ 100 112 60-140 <br /> equota 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 6 of 7 <br />