120. The operator of an incinerator for which section 107 prescribes a destruction and removal efficiency for certain contaminants must, at least once a year, calculate the destruction and removal efficiency for each contaminant referred to in that section and, for that purpose, take samples of the contaminants and measure each of the parameters necessary for the calculation.
If the composition of the residual hazardous materials is modified after the calculation of the destruction and removal efficiency referred to in the first paragraph by the introduction of a contaminant that is more thermally stable than the contaminant for which the destruction and removal efficiency has been calculated, the operator must immediately carry out a new sampling and calculation of the destruction and removal efficiency for that contaminant.