Mining target environmental surveillance study. Nitropropane sensitized, ammonium nitrate blasting agents.
Morgantown, WV: National Institute for Occupational Safety and Health, 1982 Mar; :1-21
The potential health hazards of nitropropane (NP) sensitized ammonium-nitrate (6484522) (AN) blasting agents were investigated in mine field tests. A survey was conducted of bulk NP loading. Samples were taken for 1-nitropropane (108032) (1-NP) methyl-alcohol (67561), and 2-nitropropane (79469) (2-NP). Airborne concentrations of 1-NP were well within all standards. No 2-NP was detected in any samples. Odors were noticeable at about 5 parts per million (ppm) 1- NP and 20ppm methanol (67561). Poor work practices produced unnecessary exposures as did positioning in areas of high exposure, and placing trucks downwind of the off loading NP truck. Direct reading indicator tubes were used to sample for methanol. When silica-gel adsorbent tubes were used, severe breakthrough was possible. The author concludes that worker exposures to 1-NP were below Mining Safety and Health Administration and NIOSH limits, and overexposure is unlikely under similar environmental and operating conditions. Overexposure to methanol is also unlikely. Poor work practices can result in overexposure, but unnecessary exposure can be reduced by good industrial hygiene practices.
NIOSH-Author; Exposure-levels; Chemical-properties; Industrial-hygiene; Toxicology; Worker-health; Workplace-studies; Sampling-methods; Toxic-effects;
J. C. Cocalis, Environmental Investigations Branch, NIOSH, Morgantown, West Virginia
6484-52-2; 108-03-2; 67-56-1; 79-46-9; 67-56-1
NTIS Accession No.
National Institute for Occupational Safety and Health