Investigation of d-Limonene use during aircraft maintenance degreasing operations.
Appl Occup Environ Hyg 1994 May; 9(5):303-311
A study was conducted on levels of exposure and adverse health affects associated with d-limonene (5989275) among employees at two aircraft maintenance facilities. Bulk and integrated air samples were obtained for analysis of d-limonene, butyl-carbitol (112345) or monoethanolamine (40400440) and diethanolamine (111422). The medical records of 14 employees with known direct limonene exposure were reviewed and health interviews were conducted with these workers. Limonene and methyl-ethyl-ketone (78933) (MEK) were found to be the primary constituents of the bulk air sample obtained directly over a degreasing tank in one of the facilities. No MEK was detected in the bulk air sample obtained from the other facility. The highest personal and air limonene levels in one of the shops were 5.20 parts per million (ppm) and 5.82ppm, respectively, while in the second shop a 1 hour personal sample gave a limonene concentration of 114.30ppm. MEK levels in the first shop ranged from 0.72 to 2.15ppm. MEK levels appeared to be higher in the morning compared with the afternoon while the reverse was true for limonene levels. No quantifiable amounts of butyl-carbitol were seen in any samples and 0.10ppm ethanolamine was only detected in one sample. No limonene related medical problems were identified in the exposed workers.
NIOSH-Author; Occupational-exposure; Aromatic-hydrocarbons; Hexenes; Exposure-levels; Toxic-effects; Maintenance-workers; Organic-solvents
5989-27-5; 112-34-5; 40400-44-0; 111-42-2; 78-93-3
Applied Occupational and Environmental Hygiene