524 INDUSTRIAL HYGIENE ENGINEERING
To monitor effectiveness of the control may require
routine medical and biological checks of workers and
environmental monitoring by competent persons and it may
be necessary to provide an independent review and situation
report to ensure worker acceptability.
It may be useful to introduce a software algorithm
(Alesbury, 1980) posing certain questions and providing
courses of action following the replies. One such algorithm
is offered in Figure 9.
All the above can best be achieved by a genuine desire
to make the workplace safe and directions for this can only
come from senior management with full consultation and
cooperation of the workforce.
REFERENCES
ACGIH, Industrial Ventilation, American Conference of Government
Industrial Hygienists, Michigan (1995).
Alden, J.L. and Kane, J.M., Design of Industrial Exhaust Systems, Indus-
trial Press (1970), New York.
Alesbury, R.J., Health and Safety at Work, 3, Nov. 1980.
Akbackhanzadeh, F., Metal Construction, 11, 9, 1979.
Clapp, D.E., Groh, D.S., and Nenadic, C.M., Ventilation design by micro-
computer, Am. Ind. Hyg., J37 546 (1982).
CIBS, IHVE Guide Book C, Chartered Institution of Building Services
1970, London.
BOHS, Technical Guide Series, A computer program for the design of
industrial exhaust systems, British Occupational Hygiene Society,
London, 1984.
Crockford, G.W., Ann. Occ. Hygiene, 19, 345, 1976.
Daley, B.B., Woods Practical Guide to Fan Engineering, Woods of Col-
chester Ltd., 1978.
Dallavale, J.M., Exhaust hoods, 2nd Ed. (1952), Industrial Press,
New York.
Dorman, R.G., Dust Control and Air Cleaning, Pergamon, 1974.
Fletcher, B., Ann. Occ. Hygiene, 20, 141, 1977.
Gill, F.S., Ann. Occ. Hygiene, 23, 1980.
Hemeon, W.C.L., Plant and Process Ventilation, Industrial Press (1963),
New York.
Houghton, F.C., Gutberlet, C., and Witkowski, E., ASHVE Transactions,
44, 289, 1938.
Hughes, R.T., Push-pull local exhaust ventilation, Proc. conf. Ventilation
88, London, 1988.
McDermot, H.J., Handbook of Ventilation for Contamination Control, Ann
Arbor Science, 1976.
Malchaire, J.B., Ann. Occ. Hygiene, 24, 217, 1981.
Education required
Training required
Danger situation
Long-term potential
for serious health
effect
Discomfort
Procedure to identify
and remedy
Are workers and management
aware of the hazards?
Does the system require
special knowledge to
operate effectively?
What if control fails?
What would happen if mechanical
control components fail?
What happens if control is
shut down for maintenance?
Induction training and regular
reviews of simple brief operating
codes and safety data
Backup fail safe
devices required
Routine monitoring and
safety inspections
Routine preventative maintenance
and inspections
Are consumables included in control devices? Replacement necessary
Are periodic medical or environmental surveys required?
Is the potential for failure still high? If so, try another choice or combination
of controls
FIGURE 9 Control choice “software” considerations.
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