For the purposes of
section 33(1) of the Act 3 , in respect of —
(a) any
boiler or incinerator emitting solid particles — the standard
of concentration at the point of emission determined in accordance with
regulation 4(2), of solid particles in residual gases, adjusted to a
basis of 12% carbon dioxide shall be 0.25 g/m 3 ;
(b) any
other trade, industry, process, industrial plant or fuel burning equipment
emitting solid particles not mentioned in
paragraph (a) — the standard of concentration at the
point of emission, determined in accordance with regulation 4(2) of these
regulations of solid particles in residual gases before admixture with air,
smoke or other gases shall be 0.25 g/m 3 .