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

29 CFR 1910.1052(f)(1): The employer did not institute and maintain the effectiveness of engineering controls and work practices to reduce employee exposure to or below the PEL or STEL: (a)Hill Air Force Base, at 7290 Weiner Street, Hill Air Force Base, UT: On 3/15/11, Hill Air Force Base did not institute and maintain the effectiveness of engineering controls and work practices to reduce employee exposure to or below the PEL. One employee 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. (a)Hill Air Force Base, at 7290 Weiner Street, Hill Air Force Base, UT: On 3/15/11, Hill Air Force Base did not institute and maintain the effectiveness of engineering controls and work practices to reduce employee exposure to or below the STEL. One employee 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 15 minute Time Weighted Average (TWA) Short Term Exposure Limit (STEL) of 125 ppm. The employee was exposed to methylene chloride at a concentration of 456 ppm as a 15 minute TWA. This is 3.64 times the STEL. Air monitoring was conducted for 14 minutes. Abatement Note: Abatement certification and documentation are required for this item (See enclosed "Sample Abatement-Certification Letter"). Abatement Note: Feasible engineering controls include, but are not limited to: 1.Substitution of the paint stripper containing methylene chloride with a non- methylene chloride containing paint stripper. 2.Evaluate the spraypaint booth capture velocity at the point of operation. Modify the ventilation to ensure sufficient capture velocity for aerosol. 3.Install local exhaust ventilation at the point of generation of the air contaminant. 4.Apply the paint stripper using an alternative method that does not aerosolize the methylene chloride. Abatement Note: Abatement of this item will normally be multi-step as follows: 1.Effective respiratory protection shall be provided and used by exposedemployees as an interim protective measure until feasible engineering and/or administrative controls can be implemented or whenever such controls fail to reduce employee exposure to within exposure limits. STEP 1 ABATEMENT DATE (15 DAYS): August 15, 2011 2.Submit to the Area Director a written detailed plan of abatement outlining a schedule for the implementation of engineering and /or administrative measures to control employee exposures to the hazardous substance referenced in this citation. The plan shall include, at a minimum, target dates for the following actions which should be consistent with the dates required by this citation: a.Evaluation of the extent and location of the hazard source; b.Evaluation of control measure options; c.Selection of optimum control measures; d.Determination of control measure design; e.Ordering and delivery of equipment; f.Installation of control measures; g.Training of employees in proper operation and maintenance of newly implemented control measures; and h.Assurance of the effective performance of control measures. All proposed control measures shall be evaluated for each particular use by a competent Industrial Hygienist or other technically qualified person. Thirty day progress reports are required during the abatement period. The progress report must identify the action taken to achieve abatement and the date the action was taken. STEP 2 ABATEMENT DATE (60 DAYS): September 29, 2011 3.Abatement will be completed by the implementation of feasible engineering and/or administrative controls and upon verification of their effectiveness in achieving compliance. STEP 3 ABATEMENT DATE (120 DAYS): November 28, 2011