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.. <br /> t <br /> TABLE I <br /> HYDROCARBON VAPOR CRITERIA AN, D RESPONSES <br /> j <br /> Hydrocarbon Concentrations Response <br /> <3 0 ppmv N <br /> No special action. <br /> I <br /> 30 ppmv- 300 ppmv Half-mask Organic Vapor (OV) <br /> respirators worn by all in work area. <br /> >300 ppmv Discontinue work activities and <br /> e II acuate area. Evaluate measures to <br /> suii bdue excessive vapor levels. <br /> * in parts-per-million by volume within breathing zone, measured by phlotoionization detector equipped with 10.04 <br /> eV bulb. <br /> i <br /> II <br /> I <br /> II <br /> I <br /> I <br /> i <br /> i <br /> Ili <br /> 4203-F2A <br /> January 31 1997 <br /> Revised February 25, 1997 <br />