136. For the purposes of sections 132 to 135,(1) the monthly emission limit for total fluorides or particles from a potline is calculated as the sum of the emissions measured at the potline roof vents over 4 consecutive weeks and the emissions measured at each potline scrubber;
(2) the annual emission limit for total fluorides or particles from a potline is calculated as the annual average of the emissions measured monthly at the potline roof vents and the emissions measured at each potline scrubber; and
(3) the annual emission limit for PAHs from a potline is calculated as the sum of the average of the emissions measured over 1 week every 3 months at the potline roof vents and the emissions measured at each potline scrubber.