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•.i <br /> TABLEI <br /> HYDROCARBON VAPOR CRITERIA AND RESPONSES <br /> Hydrocarbon Concentrations Response <br /> <30 ppmv No special action. <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 /> evacuate area. Evaluate measures to <br /> subdue excessive vapor levels. <br /> * in parts-per-million by volume within breathing zone, measured by photoionization detector equipped with 10.04 <br /> eV bulb. <br /> 4203-F2A <br /> January 31, 1997 <br /> Revised February 25, 1997 <br />