Wairau/Awatere Resource Management Plan Table 2 Minimum chimney heights where natural gas, liquefied gas or wood used as fuel (1.4) Heat Input Nitrogen Chimney Heat Input Nitrogen Chimney Oxides Height Oxides Height Emission Emission (MW) (kg/hour) (metres) (MW) (kg/hour) (metres) 2.0 0.5 8.3 14.0 4.5 11.7 2.5 0.6 8.5 15.0 4.8 11.9 3.0 0.8 8.7 16.0 5.2 12.1 4.0 1.1 9.1 17.0 5.6 12.3 5.0 1.4 9.4 18.0 5.9 12.5 6.0 1.7 9.7 19.0 6.3 12.7 7.0 2.0 10.0 20.0 6.7 12.8 8.0 2.4 10.3 25.0 8.6 13.7 9.0 2.7 10.6 30.0 10.6 14.5 10.0 30.0 10.8 35.0 12.7 15.2 11.0 3.4 11.0 40.0 14.7 15.8 12.0 3.7 11.3 45.0 16.9 16.4 13.0 4.1 11.5 50.0 19.0 17.0 2.0 For any discharge from a chimney: • Where the maximum energy release from the combustion of - coal or oil exceeds 10 MW or the release of sulphur dioxide exceeds 50 kg/hour; - natural gas, liquefied gas, or wood exceeds 50 MW; or • In terrain where the land rises within 5 times the indicative height of the chimney to more than half the indicative height, or in the presence of buildings which have maximum height of more than 0.4 times the indicative height of the chimney, or where there are other significant sources of sulphur dioxide or nitrogen oxides; the height of the chimney is to be determined so that the discharge will not give rise to contaminant levels in excess if an indicator level based on 40% of the New Zealand Air Quality Guidelines, Ministry for the Environment, 1994. App E - 2