Volume Two 12. Industrial 1 and 2 Zones [R] 12.1.24. Discharge of contaminants to air outside the Blenheim Airshed from the burning of solid fuel in an enclosed pellet burner. [R] 12.1.25. Discharge of contaminants to air within the Blenheim Airshed from the burning of solid fuel in a small scale solid fuel burning appliance that is 15 years of age or older (except an enclosed pellet burner). [R] 12.1.26. Discharge of contaminants to air within the Blenheim Airshed from the burning of solid fuel in a small scale solid fuel burning appliance that is up to 15 years of age (except an enclosed pellet burner), or an enclosed pellet burner of any age installed prior to 9 June 2016. [R] 12.1.27. 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. [R] 12.1.28. Discharge of heat and water vapour from cooling towers. [R, D] 12.1.29. Excavation or filling. [D] 12.1.30. Excavation or filling within the National Grid Yard. [R, D] 12.1.31. Geotechnical bore drilling for the purposes of investigation of sub-surface conditions. [R] 12.1.32. Application of an agrichemical into or onto land. [D] 12.1.33. Emergency services facility. [D] 12.1.34. Park or reserve. 12.2. Standards for all permitted activities 12.2.1. Construction and siting of a building or structure except a temporary building or structure, or an unmodified shipping container (unless any Standards listed below are specified as Standards for those activities). 12.2.1.1. The maximum height of a building or structure must not exceed: (a) 12m within the Industrial 1 Zone; (b) 15m within the Industrial 2 Zone. 12.2.1.2. A building or structure (except a fence) must be set back a minimum of 3m from a road boundary. 12 – 3