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._ .R'. - _.'Y`-z-$Y��r-T: „M'.- Y '-S•cxry'.�sr.. <br /> I <br /> CHEMICAL LISTING <br /> I <br /> Appendix E - 08ethylene Chloride - - <br /> Permissible Exposure Limit <br /> The current Federal standard for methylene chloride is 500 - <br /> parts of methylene chloride per million parts of air (ppm) aver- <br /> aged over an eight-hour work shift. with an acceptable ceiling <br /> level of 1000 ppm and a maximum peak concentration of 2000 - <br /> ppm for 5 minutes in any two-hour period. NIOSH has recom- <br /> mended that the permissible exposure limit be reduced to 75 <br /> ppm averaged over a work shift of up to 10 hours per day, 40 — <br /> hours per week, with a ceiling level of 500 ppm averaged over a - <br /> 15-minute period. NIOSH further recommends that permissible <br /> levels of methvlene chloride be reduced where carbon monoxide <br /> is present.The NOSH Criteria Document for Methylene Chloride <br /> 36 should be consulted for more detailed information. - <br /> i <br />