(a) Hourly mass emissions of sulfur dioxide (SO2), on a block one-hour average, may not exceed the following:(1) 144.11 lb/hr SO2, for the Waste Heat Boiler - CDS Stack (EPN E-6BN); and(2) 750.05 lb/hr SO2, for the Combined Flare (EPN CFL).(b) Tail gas may only be combusted in a source whose emissions are routed to Waste Heat Boiler - CDS Stack (EPN E-6BN) or Combined Flare (EPN CFL).(c) The Unit 1 Reactor/Flare Unit 1 Reactor/Flare (EPN E-10FL), Unit 2 Reactor/Flare (EPN E-20FL), and Unit 4 Reactor/Flare (EPN E-40FL) may not operate on or after the compliance date in §112.228 of this title (relating to Compliance Schedules). (d) If the Combined Flare (EPN CFL) is not authorized and constructed by the compliance date in §112.228 of this title, no flaring is allowed until EPN CFL is authorized, constructed, and operating.(e) After construction and commencement of operation, the Combined Flare (EPN CFL) must meet the following parameters:(1) only receive tail gas when Waste Heat Boiler - CDS Stack (EPN E-6BN) is not operating; and(2) be constructed with a stack height of 65.00 meters and must be located at Universal Transverse Mercator (UTM) coordinates UTM East Meters 279745.85 and UTM North Meters 3949549.50 in UTM Zone 14.(f) The owner or operator may request an alternate means of control under the provisions of §112.232(k) of this title (relating to Control Requirements).