1-Bromopropane 3


1-Bromopropane 3 : Protecting Workers: Reducing Worker Exposure Evaluating Exposure: Evaluation of exposures in the workplace involves identification of potential hazards followed by characterization or estimates of the level of those hazards. Worker exposures to 1-BP in the air as well as through skin contact should be measured to determine whether the hazard needs to be controlled. Biological monitoring, such as measuring of 1-BP and its metabolites in the urine of exposed workers, may also be a useful tool to evaluate worker exposures. Many of the resources listed at the end of this document have information useful in evaluating worker exposures to 1-BP [Hanley et al. 2010; NIOSH 2002b]. Examples of Sampling Results: Although exposures may not be found to exceed air concentration levels set by California or ACGIH at every workplace using 1-BP [NIOSH, 2000], overexposures have been found on many occasions. ACGIH currently recommends a 10 parts per million (ppm) threshold limit value but has proposed lowering the value to 0.1 ppm [ACGIH 2013]. Controlling Exposure: Some types of controls are preferred over others because they are more effective. Based on the principles of general industrial hygiene practice, the following types of controls (listed in order of preference) should be considered to control workplace exposures to 1-BP: Elimination or Substitution: Eliminating the hazard of concern or substituting the hazardous substance with a less toxic/hazardous process material are the most effective ways to reduce exposures to a potentially hazardous substance. For example, an employer may be able to substitute water-based or acetone-based adhesives for 1-BP based adhesives. Replacement chemicals may also have associated hazards that need to be considered and controlled. Engineering Controls: Engineering controls to reduce worker exposure to an airborne contaminant, preferably at the point where the contaminant gets into the air, or otherwise isolating the contaminant away from where workers are located, are effective means for reducing exposure. A variety of engineering controls may be considered: (1) Isolation: Isolation of workplace operations is a proven method of reducing worker exposures. For example, isolating machinery using 1-BP from other work areas can reduce occupational exposure to 1-BP in workers not using the machinery. When isolating 1-BP operations is being considered, it is important to consider whether exhaust ventilation will be necessary to avoid a possible increase in exposure within the isolated work area. (2) Ventilation: For proper design and installation of ventilation systems, including local exhaust ventilation, it is important to work with persons qualified in these systems. A routine maintenance schedule should be implemented to ensure that ventilation equipment is performing effectively. (3) Other Controls: Other types of engineering controls may also be helpful, depending on the work activity. For example: (3.1) Workplaces using vapor degreasing systems should consider controls such as automatically-controlled hoists, sliding or rolling covers, and ensuring the effectiveness of cooling coils. (3.2) Dry cleaning operators using 1-BP should have a qualified technician manage the conversion of machines that previously used a different solvent. Machine features helpful in reducing exposure to 1-BP include safety switches, safety interlocks, filtration systems, filling devices, use of gaskets and seals resistant to 1-BP, and process controls. Processes may also need to be performed at different operating conditions such as lower temperatures. (4) Worker exposures to 1-BP should be re-evaluated periodically after engineering controls are installed to be sure that the controls remain effective. See more from topic source: https://www.osha.gov/html/a-z-index.html
No records Found
afaatim.com copyright © April 2016 Dr.K.R.Kamaal. All rights reserved