23. Airport Zone Volume Two (e) when essential unplanned engine testing occurs, the date, time, duration and reason for the tests must be recorded and provided to the Marlborough District Council upon request. 23.3.2. Excavation or filling. 23.3.2.1. Excavation or fill must not be within a Level 2 or 3 Flood Hazard Area. 23.3.2.2. Excavation must not intercept groundwater or cause any ponding of surface run-off. 23.3.2.3. Excavation or filling must not occur within 8m of a river or drainage channel. 23.3.2.4. Batters must be designed and constructed to ensure they are stable and remain effective after completion of the excavation. 23.3.2.5. A filled area must be designed, constructed and maintained to ensure it is stable and remains effective after completion of filling. 23.3.2.6. 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 or filling. The diameter of a culvert used to drain excavation or a fill area must not be less than 300mm. 23.3.2.7. 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. 23.3.2.8. 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. 23.3.2.9. The fill must not contain any: (a) hazardous substances; (b) combustible or organic materials; (c) any other contaminant subject to chemical or biological breakdown; (d) liquids or sludge. 23.3.3. Geotechnical bore drilling for the purposes of investigation of sub-surface conditions. 23.3.3.1. The bore must be drilled by a Recognised Professional. 23.3.3.2. 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. 23.3.3.3. On completion of the geotechnical investigation, the bore must be sealed or capped to prevent any potential contamination of groundwater. 23.3.4. Application of an agrichemical into or onto land. 23.3.4.1. The agrichemical must be approved for use under the Hazardous Substances and New Organisms Act 1996. 23.3.4.2. The application must not result in the agrichemical being deposited in or on any river, lake, Significant Wetland or drainage channel that contains water. 23.3.4.3. 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. 23 – 6