21.
The source of contamination should be enclosed as completely as possible.
The contaminant should be captured with adequate air velocity.
The contaminant should be kept out of the worker's breathing zone.
Adequate make-up air must be provided, or, exhaust air must be discharged away
from air inlet systems. (para 4-4a)
22.
d
(para 4-4c)
23.
c
(para 4-4d(2))
24.
b
(para 4-5a)
25.
c
(para 4-5b)
26.
b
(para 4-5b NOTE)
27.
a
(para 4-5c(1))
28.
b
(para 4-6a)
29.
d
(para 4-6c)
30.
c
(para 4-6c)
31.
a
(para 4-5b)
32.
b
(para 4-5b)
33.
a
(para 4-7a)
34.
a
(para 4-8b(1))
35.
c
(para 4-8b(2))
36.
d
(para 4-8b(4))
37.
d
(para 4-8b(3))
38.
a
(para 4-8b)
39.
b
(para 4-9)
40.
a
(para 4-10b, NOTE)
41.
b
(para 4-10c)
MD0165
4-40