Volume Two 12. Industrial 1 and 2 Zones 12.3.16. Discharge of contaminants to air within the Blenheim Airshed from the burning of solid fuel in any small scale solid fuel burning appliance installed after 9 June 2016. 12.3.16.1. The appliance must comply with the emission, operational and other requirements of Appendix 8 – Schedule 1. 12.3.16.2. The appliance must comply with the stack requirements of Appendix 8 – Schedule 2. 12.3.16.3. The appliance must burn only fuels approved for use in the appliance. 12.3.17. Discharge of heat and water vapour from cooling towers. 12.3.17.1. No more than 5MW of heat per hour must be discharged. 12.3.18. Excavation or filling. 12.3.18.1. Excavation or filling must not occur within 8m of the landward toe of a stopbank and the depth of any excavation must not exceed 20% of the distance between the landward toe of the stopbank and the excavation. 12.3.18.2. Excavation or filling must not be within a Level 2 or 3 Flood Hazard Area. 12.3.18.3. The maximum volume for excavation must not exceed 50m per Computer 3 Register within any 12 month period, unless the excavation is to establish the foundation for a building permitted in this zone. 12.3.18.4. The maximum volume for filling must not exceed 50m per Computer 3 Register within any 12 month period, unless the filling is to establish the foundation for a building permitted in this zone. 12.3.18.5. Excavation or filling must not occur on land with a slope greater than 10°. 12.3.18.6. There must be no excavation in excess of 10m within a Groundwater 3 Protection Area. 12.3.18.7. Excavation must not intercept groundwater or cause any ponding of surface run-off. 12.3.18.8. Excavation or filling must not occur in, or within 8m of, a river, Significant Wetland, drainage channel or Drainage Channel Network. 12.3.18.9. Batters must designed and constructed to ensure they are stable and remain effective after completion of the excavation. 12.3.18.10. A filled area must designed, constructed and maintained to ensure it is stable and remains effective after completion of filling. 12.3.18.11. Water control measures and sediment control measures must be designed, constructed and maintained in all areas disturbed by any excavation or filling, such that the areas are stable and the measures remain effective after completion of the excavation. The diameter of a culvert used to drain excavation or filled area must not be less than 300mm. 12.3.18.12. Excavation or filling must not occur on a slope greater than 7.5° if the activity is within a Soil Sensitive Area identified as loess soils. 12.3.18.13. For staged excavation or filling, any part of the excavation or fill area that has not been further developed within 12 months must be re-vegetated. 12.3.18.14. Where the excavation or filling results in areas of exposed soil those areas must be re-vegetated within 12 months of the completion of the excavation or filling. 12.3.18.15. The fill must not contain any: 12 – 11