Rule 11 Mineral drying and heating (including glass and mineral fibre manufacture)
The discharge of contaminants into air from an industrial or trade premises in connection with any process involving:
(1) the drying or heating of minerals, where the generation capacity is equal to or less than 100 kW (measured by the higher heating value of the input fuel);
is a Permitted Activity, provided it complies with the conditions below, and excluding any discharges of contaminants to air arising from processes involving:
(a)the manufacture of portland or similar cements and pozzolanic materials;
(b)the sintering, calcining or roasting of metal ores in preparation for smelting, the burning of calcium or calcium-magnesium carbonates to produce calcium or magnesium oxides of hydroxides, the expansion or exfoliation of minerals, or the dehydration of gypsum;
(c)the making of glass, frit, mineral wool or glass fibre, including the application of any surface coating to the fibres;
(d)the manufacture of hot-mix asphalt paving mixes, including manufacture using mobile or portable asphalt plants; or
(e)the emission of any hazardous air pollutants as listed in Appendix 1.
The person(s) responsible for the activity shall ensure that:
(i) there is no discharge of particulates greater than 250 mg/m (at STP), measured at the point of discharge;
(ii)there is no smoke, dust, odour, gas or vapour from the process, which is noxious, dangerous, offensive or objectionable at or beyond the boundary of the property; and
(iii)the discharge of contaminants from drying or heating of minerals, must be vented through a chimney(s) which terminates at least three metres above the level of any adjacent area to which there is general access.
Explanation: Rule 11 relates to discharges to air from processes involving the drying and heating of minerals. This rule covers discharges from industrial and trade processes only. Rule 11 permits the discharge of contaminants to air from the drying or heating of minerals where the generation capacity is equal to or less than 100 kW (measured by the higher heating value of the input fuel), and subject to compliance with the stated conditions.
Those processes which involve a generation capacity of more than 100 kW or which are otherwise explicitly excluded from Rule 11, and are related to industrial and trade processes, require a resource consent under Rule 23.
The stated conditions in Rule 11 require that there is no discharge of particulates of a concentration greater than 250 mg/m 3 (at STP) measured at the point of discharge, and that there are no offensive, objectionable or noxious discharges.