Boralex has applied to extend the exemption period from four hours from the initiation of cold start-up to eight hours from the initiation of cold start-up. Also, during start-up periods the efficiency of the multiclone is slightly reduced due to gas flow rates during start-up being lower than that of operations at normal firing rates. Due to these factors, during past start-up periods, Boralex has experienced numerous excedences of the boiler opacity restriction Average annual production: 252GWh (from Biomass Power Association)