129. The opacity of grey or black combustion gas emitted into the atmosphere by an incineration facility governed by this Chapter must not exceed 20% except(1) for a maximum of 4 minutes per hour at which time the opacity of the emissions may attain a maximum of 40%; or
(2) on igniting the combustion chamber or blowing tubes at which time the opacity of the emissions may attain a maximum of 60% for a maximum of 4 minutes.
The opacity of the emissions is measured using the Micro-Ringelmann Chart in the manner set out in Schedule I.