High risk crystalline silica work is work performed in connection with a crystalline silica process that is reasonably likely to result in—
(a) an airborne concentration of respirable crystalline silica that exceeds half the exposure standard for respirable crystalline silica; or
(b) a risk to the health of a person at the workplace.
Reg. 319D inserted by S.R. No. 137/2021 reg. 7.