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t <br /> Gettler-Ryan/Geostrategtes(1) y Project Unocal(4) y� <br /> 6747 Sierra Court,Suite I Project Number Formes UnocalSS#2859 Reported <br /> Dublin CA,94568 Project Manager- Deanna Harding 02/23/01 07 12 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUF17 - Quality Control <br /> Sequoia Analytical- San Carlos <br /> Reporting spi7ce source %REC RPD <br /> lAnalyte Result u limit Units Level Result %REC Lumts RPD L=t Notes <br /> Batch 1020057-EPA 5030B <br /> LCS(1020057-BS3) Prepared&Analyzed 02/20/01 <br /> Benzene 939 0 500 ug/l 100 93 9 70-130 <br /> Toluene 9 17 0 500 " 100 917 70-130 <br /> Ethylbenzene 928 0 500 " 100 928 70-130 <br /> Xylenes(total) 277 0 500 ' " 300 923 70-130 <br /> Surrogate a,a a-TrIfluorotoluene 836 100 83 6 70-130 - <br /> LCS(1020057-BS4) Prepared&Analyzed 02/20/01 <br /> Purgeable Hydrocarbons as Gasohne 300 500 ug/I 250 120 70-1130 <br /> Surrogate a,a,a-Trrjluorotoluene 845 100 845 70-130 <br /> Martz Spike(1020057-MSI) Source L102062-04 Prepared&Analyzed 02/18/01 y <br /> Benzene 952 0 500 ug/l 100 ND 952 60-140 <br /> Toluene 100 0 500 100 ND 100 60-140 <br /> Ethylbenzene 100 0 500 100 ND 100 60-140 <br /> Xylenes(total) 294 0 500 300 ND 98 0 60-140 <br /> Surrogate a a a-Tnfluorotoluene 929 100 929 70-130 <br /> Matrix Spike Du (1020057-MSD1) Source L102062-04 Prepared&Analyzed 02/18/01 <br /> Benzene —= - _ — __--9 78 =_=0 500 —ug/1�10 0 ND-. �.r97 8.r..-60-140 2 691=-. 25_ <br /> Toluene 104 0 500 100 ND 104 60440 392 25 <br /> Xylenes(total) 308 0 500 " 300 ND 103 60-140 4 65 25 <br /> Surrogate a,a,a-Tris luorotoluene 923 " 100 923 70-130 <br /> Batch 1020058-EPA 5030B <br /> Blank(1020058-BLK1) Prepared&Analyzed 02/21/01 <br /> Purgeable Hydrocarbons as Gasoline ND 500 ug/l <br /> Benzene ND 0 500 " <br /> Toluene ND 0 500 " <br /> Ethylbenzeae ND 0 500 " <br /> Xylenes(total) ND 0 500 " <br /> Methyl tett-butyl ether ND 5 00 " <br /> Surrogate a a a-Dl jAorotoluene 106 100 106 70-130 <br /> Sequoia Analytical-San Carlos The results in this report apply to the samples analyzed in accordance with the cha <br /> custody document 7hLs analytical report must be reproduced to its entirety <br /> Page 7 of 10 <br />