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F• <br /> Gettler-Ryan/Geostrategtes(l) Prosect Tosco(1) <br /> 6747 Sierra Court,Suite J Project Number Tosco SS#5886 Reported <br /> Dublin CA,94568 PtolectM-909- Deanna Harding 07/12/01 14 02 <br /> MTBE by DHS LUFT-Quality Control <br /> Sequoia Analytical -San Carlos <br /> Rq-mw spat Soaroc %REC RPD <br /> Analyte Remo Last Unm Level Remit IAREC Ltm>ts RPD Lit Notm <br /> Batch 1070041-EPA 5030B(PIT) <br /> Blank(1070041-BLKI) _ Prepared&Analyzed 07/10/01 <br /> Methyl ten-butyl dher ND 50 ug/I --- — ^— <br /> Surrogate a,a,a-Trifluorololuene 969 100 969 60-140 <br /> LCS(1070041-BSI) Prepared&Analyzed 07/10/01 <br /> Methyl tart-butyl ether 467 So ug/1 70-130 <br /> Surrogate a a a-Tr fluorotoluene 983 100 983 60-140 <br /> LCS(1070041-BS2) Prepared&Analyzed 07/10/01 <br /> Surrogate a,aa-Trfluorotoluene 991 ug/7 100 991 60-140 <br /> Matrix Spike(1070041-MSI) Source L106220-14 Prepared&Analyzed 07/10/0l <br /> Vie a a a-Pifluorvioluene 941 119/1 100 941 60-140 <br /> Matrix Spike Du (1070041-MSDI) Source L106220-14 Prepared&Analyzed 07/10/01 <br /> Surrogate a,a,a-Trifluorotoluene 762 u94 100 761 60-140 <br /> Batch 1070047-EPA 5030B(PAD <br /> Blank(1070047-BLKI) Prepared&Analyzed 07/11/01 <br /> Methyl tent-butyl dher ND 50 ug/I <br /> Surrogate aa a-Tnfluorotoluene 922 100 912 60-140 <br /> LCS(1070047-BS1) Prepared&Analyzed 07/11/01 <br /> Methyl test-butyl ether 387 50 ug/1 70-130 <br /> Surrogate a a a-Tnfluorotoluene 881 100 881 60-140 <br /> LCS(1070047-BS2) Prepared&Analyzed 07/11/01 <br /> Surrogate a,a,a-Tnfluorotoluene 899 11g/1 100 899 60-140 <br /> A <br /> Ola Ana iybcal-San Carlos The results in this repon apply to the samples analysed in accordance with the chain of <br /> custody document.Thts analytical report must be reproduced to its entirety <br /> Page 4 of 6 <br />