RESULTS
Exposure
The cleaning lasted between 28 and 41 min. The average
toluene concentration in air measured by personal air sampling
ranged between 1115 and 1358 mg
/
m
3
(100 ppm is
approximately 380 mg
/
m
3
). The concentrations in blood increased
from 0.87 mg
/
l (
6
0.6) to 4.92 mg
/
l (
6
1.14). The values
of the single subjects are given in Table 1. Blood alcohol levels
of all subjects did not exceed 5 mg
/
dl (0.05º⁄ºº).
None of the subjects had any prenarcotic symptoms (e.g.,
dizziness, headache). One of the examiners, however, left the
cleaning room during two experiments due to a headache related
to high concentrations of toluene.