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' • Table 2 • <br /> Maximum Detected Concentrations Compared to ESLs <br /> Frontier Transportation <br /> 425 W.Larch Road Tmcy,CA <br /> Maximum Concentration Maximum Concentration Residential ESL Commercial ESL <br /> Chemical (ppmv) (Ijgjl) (lig/1) (Pg/1) <br /> Benzene 5.4 17.5 0.084 0.28. <br /> Toluene 9.5 36.3 63 180 <br /> Ethylbennne 0.11 0.48 0.98 3.3 <br /> Xylenes 1.1 0.06 0.031 0.1 <br /> MTBE 44 160.6 9.4 31 <br /> Notes: <br /> ppmv=Parts per million by volume <br /> pg/l=Microgram per liter <br /> ESL=Califomia Regional Water Quality Control Board,San Francisco Region, Environmental Screening Level(2008) <br /> MTBE=Methyl tertiary butyl ether <br /> �'�Nea.tna. <br />