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Sequoia 819 Avenue Suite <br /> Sacramento CA 958344 <br /> FAX(916)921-0100 j <br /> Analytical www sequotalabscom <br /> *IWO <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 02/22/01 18 49 <br /> Total Purgeable Hydrocarbons (C&C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %REC RPA <br /> Analyte Result Limit Units Level Result %REC Limits RPD limit [totes <br /> Batch 1020165-EPA 5030B (P/T) <br /> Blank(1020165-BLKI) Prepared&Analyzed 02/16/01 <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 2 50 <br /> Surrogate a a a-Trifluorotoluene 920 100 920 60-140 <br /> LCS(1020165-BSI) Prepared&Analyzed 02/16/01 <br /> Benzene 8 03 0 500 ug/l 100 903 70-130 <br /> isuene 828 0 500 100 828 70-130 <br /> ylbenzene 846 0 500 100 946 70-130 <br /> Xylenes(total) 256 0 500 300 85 3 70-130 <br /> Methyl tent-butyl ether 894 2 50 100 894 70-130 <br /> Surrogate a a a-Trifluorotoluene 797 100 79 7 60-140 <br /> Matrix Spike(1020165-MS1) Source 5102213-02 Prepared&Analyzed 02/16/01 <br /> Benzene 989 0 500 ug/l 100 ND 989 60-140 <br /> Toluene 101 0 500 loo ND 101 60-140 <br /> Ethylbenzene 10 3 0 500 100 ND 103 60-140 <br /> Xylenes(total) 305 0 500 300 ND 102 60-140 <br /> Methyl tert-butyl ether 961 250 100 ND 961 60-140 <br /> Surrogate a a a-Trifluarotoluene 10 7 100 107 60-140 <br /> Matrix Spike Dup(1020165-MSD1) Source 5102213-02 Prepared&Analyzed 02/16/01 <br /> Benzene 976 0 500 ug/l 100 ND 976 60-140 132 25 <br /> Toluene 999 0 500 100 ND 999 60-140 1 10 25 <br /> Ethylbenzene 102 0 500 too ND 102 60-140 0 976 25 <br /> Xylenes(total) 302 0 500 300 ND 101 60-140 0 988 25 <br /> Methyl Cert-butyl ether 878 2 50 100 ND 87 8 60-140 903 25 <br /> Surrogate a a a-Trifluorotoluene 103 100 103 60-140 <br /> AN <br /> equota Analytical-Sacramento The results in this report apply to the samples analvzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> page 4 of 7 <br />