12. Industrial 1 and 2 Zones Volume Two (a) hazardous substances; (b) combustible or organic materials; (c) any other contaminant subject to chemical or biological breakdown; (d) liquids or sludge. 12.3.19. Excavation or filling within the National Grid Yard. 12.3.19.1. Excavation within the National Grid Yard in the following circumstances is exempt from Standards 12.3.19.2 to 12.3.19.5 (inclusive): (a) Excavation that is undertaken as part of agricultural or domestic cultivation, or repair, sealing or resealing of a road, footpath, driveway or farm track; (b) Excavation of a vertical hole, not exceeding 500mm in diameter, that is more than 1.5m from the outer edge of a pole support structure or stay wire; (c) Excavation of a vertical hole, not exceeding 500mm in diameter, that is a post hole for a farm fence or horticulture structure and more than 5m from the visible outer edge of a tower support structure foundation. 12.3.19.2. The excavation must be no deeper than 300mm within 6m of the outer visible edge of a Transmission Tower Support Structure. 12.3.19.3. The excavation must be no deeper than 3m between 6m and 12m of the outer visible edge of a Transmission Tower Support Structure. 12.3.19.4. The excavation must not compromise the stability of a National Grid Support Structure. 12.3.19.5. The fill must not result in a reduction in the ground to conductor clearance distances as required in Table 4 of the New Zealand Electrical Code of Practice (NZECP34:2001). 12.3.20. Geotechnical bore drilling for the purposes of investigation of sub-surface conditions. 12.3.20.1. The bore must be drilled by a Recognised Professional. 12.3.20.2. A copy of the bore log, including a grid reference identifying the bore location, must be supplied to the Council in a suitable electronic format within 20 working days of drilling of the bore. 12.3.20.3. On completion of the geotechnical investigation, the bore must be sealed or capped to prevent any potential contamination of groundwater. 12.3.21. Application of an agrichemical into or onto land. 12.3.21.1. The agrichemical must be approved for use under the Hazardous Substances and New Organisms Act 1996. 12.3.21.2. The application must be undertaken in accordance with the most recent product label. All spills of agrichemicals above the application rate must be notified to Council immediately. 12.3.21.3. All reasonable care must be exercised in the application to ensure that the agrichemical must not pass beyond the legal boundary of the area of land on which the agrichemical is being applied. 12.3.21.4. The application must not result in the agrichemical being deposited on a river, lake, Significant Wetland, drainage channel or Drainage Channel Network that contains water. 12 – 12