Text For Citation: 01 Item/Group: 025A Hazard: CHEMNEP

29 CFR 1910.1052(c)(1): The employer did not ensure that no employee(s) was exposed to an airborne concentration of methylene chloride in excess of twenty-five parts per million parts of air (25 ppm) as an 8-hour TWA: (a)Hill Air Force Base, at 7290 Weiner Street, Hill Air Force Base, UT: On 3/15/11, Hill Air Force Base did not ensure that no employee was exposed to an airborne concentration of methylene chloride in excess of twenty-five parts per million parts of air (25 ppm) as an 8-hour TWA. Employees chemically stripped paint from aircraft parts in Building 220 using Henkel Turco 5351 Paint Stripping Agent (containing 30-60% methylene chloride). This process generated methylene chloride aerosol. On 3/3/11 one employee was exposed to methylene chloride at a concentration greater than the 8 hour Time Weighted Average (TWA) Permissible Exposure Limit (PEL) of 25 ppm. The employee was exposed to methylene chloride at a concentration of 251.6 ppm for 57 minutes which resulted in an 8 hour TWA exposure of 30 ppm. This is 1.19 times the PEL. Air monitoring was conducted for 57 minutes. Abatement Note: Abatement certification and documentation are required for this item (See enclosed "Sample Abatement-Certification Letter").-Certification