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APPENDIX B 310 A1.7.2 In view of the fuel-related emission from a plant with such a high capacity, installation of a flue gas sea water scrubber should be considered. This installation can perform an efficient after-cleaning of the flue gases, thus minimizing the content of HCI, SOx, particulate matter. A1.7.3 Any restriction in nitrogen oxide (NOx) should only be considered in connection with possible future regulations on pollution from the vessel's total pollution, i.e. main and auxiliary machinery, boilers, etc. A2 - Fire protection requirements for incinerators and waste stowage spaces For the purpose of construction, arrangement and insulation, incinerator spaces and waste stowage spaces should be treated as category A machinery spaces (SOLAS II-2/3.19) and service spaces (SOLAS II-2/3.12), respectively. To minimize the fire hazards these spaces represent, the following SOLAS requirements in chapter II-2 should be applied: A2.1 For passenger vessels carrying more than 36 passengers: .1 regulation 26.2.2(12) should apply to incinerator and combined incinerator/waste storage spaces, and the flue uptakes from such spaces; and .2 regulation 26.2.2(13) should apply to waste storage spaces and garbage chutes connected thereto. A2.2 For all other vessels, including passenger vessels carrying not more than 36 passengers: .1 regulation 44.2.2(6) should apply to incinerator and combined incinerator/waste spaces, and the flue uptakes from such spaces; and .2 regulation 44.2.2(9) should apply to waste storage spaces and garbage chutes connected thereto. A2.3 Incinerators and waste stowage spaces located on weather decks (regulation II-2/3.17) need not meet the above requirements but should be located: .l as far aft on the vessel as possible; .2 not less than 3 m from entrances, air inlets and openings to accommodations, service spaces and control stations; .3 not less than 5 m measured horizontally from the nearest hazardous area, or vent outlet from a hazardous area; and .4 not less than 2 m should separate the incinerator and the waste material storage area, unless physically separated by a structural fire barrier.