Acts and Regulations

96-105 - Underground Mine

Section 62
Disposition versions

Full text
Testing for ionizing radiation
62(1)In this section
“time weighted average concentration” means the concentration of radon or thoron over a normal eight hour workday and forty hour work week to which nearly all employees may be repeatedly exposed without adverse effect;(concentration moyenne pondérée)
“WL” means the concentration of radon (Rn 222) or thoron (Rn 220) disintegration products in one cubic metre of air that will release 2.08 x 10-5 joules of alpha particle energy during their radioactive decay to lead - 210 (radium D) or lead - 208 (thorium D) respectively;(WL)
“WLM” means the exposure resulting from the inhalation of air containing one WL of radon or thoron daughters for one WM where one WM equals one hundred and seventy working hours.(WLM)
62(2)An employer shall ensure that the concentration of radon or thoron disintegration products is monitored by properly calibrated instruments in accordance with the following schedule:
(a) where concentrations are less than 0.04 WL, in accordance with the frequency established in the air monitoring plan;
(b) where concentrations are in the range of 0.04 WL to 0.20 WL, inclusive, at least quarterly; and
(c) where concentrations are over 0.20 WL, at least monthly.
62(3)If radon or thoron daughter levels at any time exceed 0.30 WL, an employer shall take immediate steps to reduce the level of concentration by engineering controls and shall ensure that precautions are taken to protect the health and safety of employees if the engineering controls are ineffective.
62(4)An employer shall ensure that the exposures of employees to radon or thoron are maintained as low as reasonably achievable by appropriate engineering controls and that individual exposures do not exceed 4.8 WLM per year and the time weighted average concentration does not exceed 0.40 WL.
62(5)An employer shall
(a) appoint a person to measure and record the exposure of each employee exposed to radon or thoron,
(b) report these exposures in Form 2 to the Commission at the intervals required by the Commission, and
(c) post a copy of the report in a conspicuous place at the place of employment.
62(6)An employer shall ensure that a person appointed under paragraph (5)(a) is competent.
62(7)Where exposures are less than 0.10 WLM per quarter year, a report under subsection (5) is not required.
Testing for ionizing radiation
62(1)In this section
“time weighted average concentration” means the concentration of radon or thoron over a normal eight hour workday and forty hour work week to which nearly all employees may be repeatedly exposed without adverse effect;
“WL” means the concentration of radon (Rn 222) or thoron (Rn 220) disintegration products in one cubic metre of air that will release 2.08 x 10-5 joules of alpha particle energy during their radioactive decay to lead - 210 (radium D) or lead - 208 (thorium D) respectively;
“WLM” means the exposure resulting from the inhalation of air containing one WL of radon or thoron daughters for one WM where one WM equals one hundred and seventy working hours.
62(2)An employer shall ensure that the concentration of radon or thoron disintegration products is monitored by properly calibrated instruments in accordance with the following schedule:
(a) where concentrations are less than 0.04 WL, in accordance with the frequency established in the air monitoring plan;
(b) where concentrations are in the range of 0.04 WL to 0.20 WL, inclusive, at least quarterly; and
(c) where concentrations are over 0.20 WL, at least monthly.
62(3)If radon or thoron daughter levels at any time exceed 0.30 WL, an employer shall take immediate steps to reduce the level of concentration by engineering controls and shall ensure that precautions are taken to protect the health and safety of employees if the engineering controls are ineffective.
62(4)An employer shall ensure that the exposures of employees to radon or thoron are maintained as low as reasonably achievable by appropriate engineering controls and that individual exposures do not exceed 4.8 WLM per year and the time weighted average concentration does not exceed 0.40 WL.
62(5)An employer shall
(a) appoint a person to measure and record the exposure of each employee exposed to radon or thoron,
(b) report these exposures in Form 2 to the Commission at the intervals required by the Commission, and
(c) post a copy of the report in a conspicuous place at the place of employment.
62(6)An employer shall ensure that a person appointed under paragraph (5)(a) is competent.
62(7)Where exposures are less than 0.10 WLM per quarter year, a report under subsection (5) is not required.