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value of benzene or vinyl chloride to which workers may be exposed over an <br /> 8-hour period is 1 ppm. The maximum concentration of vinyl chloride to which <br /> workers may be exposed in any given period is 5 ppm. If higher levels of vinyl <br /> chloride are found, respiratory protection levels may need to be adjusted to <br /> Level B (SCBA or supplied air) if engineering controls cannot reduce these <br /> levels. Because vinyl chloride and benzene are both regulated carcinogens, it <br /> is imperative and required that exposure be limited where at all possible; if not, <br /> then exposure must be reduced to the minimum possible extent through <br /> _ appropriate respiratory protection (i.e., vinyl chloride and benzene exposure <br /> should be held to zero whenever possible). For the Vinyl Chloride Standard, <br /> see 29 CFR 1910.1017. For the Benzene Standard, see 29 CFR 1910.1028. <br /> 5. Special compliance requirements apply for personnel ,who must_ work with <br /> potential exposure to certain chemicals including vinyl chloride, benzene, and <br /> asbestos above action levels. Compliance requirements may vary with each <br /> compound and by state, but will likely include: <br /> ♦ Mandatory training. <br /> ♦ Medical record keeping. <br /> ♦ Exposure monitoring, and record keeping. <br /> ♦ Certifications. <br /> Specific protective equipment requirements. <br /> e <br /> ►_26 <br />