Volume Two 22. Lake Grassmere Salt Works Zone [R] 22.4.1. Discharge of contaminants to air, of the products of combustion from fuel burning equipment used for generating heat or electric power using: (a) untreated wood, coal or oil, except waste oil, for the purposes of generating heat or electric power at a rate not exceeding 10MW; (b) methane or natural or liquefied petroleum gas for the purposes of generating heat or electric power at a rate not exceeding 50MW; where the limits specified in (a) or (b) above apply to the cumulative generated heat or electric power produced by the specified fuel within the same premises. Standards and terms: 22.4.1.1. The discharge must be from a chimney. 22.4.1.2. The chimney must be designed so that the minimum efflux velocity is 20m/s at the chimney exit at full load for sources less than 10MW capacity, and 15m/s for sources equal to or greater than 10MW capacity. 22.4.1.3. The chimney must be designed so that the discharge is vertically upwards and unimpeded by cowls or any other fixtures on the top of the stack coning may be used to increase the velocity discharge. 22.4.1.4. The chimney height must comply with the requirements of Appendix 8 – Schedule 5. Matters over which the Council has reserved control: 22.4.1.5. The location of the point of discharge. 22.4.1.6. The carrying out of measurements, samples, analyses, surveys, investigations or inspections. 22.4.1.7. The provision of information to the Council at specified times. 22.4.1.8. Compliance with monitoring, sampling and analysis conditions at the consent holder’s expense. [R, D] 22.4.2. Excavation of land exceeding 500mm in depth. Standards and terms: 22.4.2.1. The excavation must not exceed a depth of 1.5m. 22.4.2.2. The excavation must not occur further than 100 metres from the zone boundary. Matters over which the Council has reserved control: 22.4.2.3. The excavation of test pits; 22.4.2.4. The protection of adjoining land from contamination by brine/saline water; 22.4.2.5. Transmissiveness of the soils media between the site of excavation and the zone boundary; 22.4.2.6. The relationship of Maori and their culture and traditions with their ancestral lands, water, sites, waahi tapu and other taonga. 22 – 11