THE SCHEDULEAMENDMENTS TO THE PRINCIPAL REGULATIONS
1
In regulation 2(1) for the definitions of “action level” and “control limit” substitute the following definitions—
“action level” means one of the following cumulative exposures to asbestos over a continuous 12-week period when measured or calculated by a method approved by the Health and Safety Commission, namely—
- a
where the exposure is solely to chrysotile, 96 fibre-hours per millilitre of air; or
- b
where exposure is to any other form of asbestos either alone or in mixtures including mixtures of chrysotile with any other form of asbestos, 48 fibre-hours per millilitre of air; or
- c
where both types of exposure occur separately during the 12-week period concerned, a proportionate number of fibre-hours per millilitre of air;
“control limit” means one of the following concentrations of asbestos in the atmosphere when measured or calculated by a method approved by the Health and Safety Commission, namely—
- a
for chrysotile—
- i
0.5 fibres per millilitre of air averaged over any continuous period of 4 hours,
- ii
1.5 fibres per millilitre of air averaged over any continuous period of 10 minutes;’
- b
for any other form of asbestos either alone or in mixtures including mixtures of chrysotile with any other form of asbestos—
- i
0.2 fibres per millilitre of air averaged over any continuous period of 4 hours,
- ii
0.6 fibres per millilitre of air averaged over any continuous period of 10 minutes;