17. Open Space 1 Zone Volume Two (b) not be left in a position where it can enter, or be carried into, a river (except an ephemeral river), lake, Significant Wetland or the coastal marine area; (c) be stored on stable ground; (d) be managed to avoid accumulation to levels that could cause erosion or instability of the land. 17.3.4. Excavation. 17.3.4.1. Excavation must not be in, or within: (a) 8m of a river (except an ephemeral river when not flowing); (b) 8m of the landward toe of a stopbank and the depth of any excavation beyond that may not exceed 15% of the distance between the landward toe of the stopbank and the excavation; (c) a Soil Sensitive Area identified as loess soils. 17.3.4.2. There must be no excavation in excess of 10m 3 within a Groundwater Protection Area. 17.3.4.3. Batters must designed and constructed to ensure they are stable and remain effective after completion of the excavation. 17.3.4.4. Water control measures and sediment control measures must be designed, constructed and maintained in an area disturbed by excavation, such that the area is stable and the measures remain effective after completion of the excavation. The diameter of any culvert used to drain excavation must not be less than 300mm. 17.3.4.5. Wheeled or tracked machinery must not be operated in, or within 8m of, a river (except an ephemeral river or intermittently flowing river, when not flowing) or the coastal marine area. 17.3.5. Filling of land with clean fill. 17.3.5.1. The filling must not use commercial clean fill. 17.3.5.2. Filling must not be in, or within: (a) 8m of a river (except an ephemeral river when not flowing); (b) 8m of the landward toe of a stopbank; (c) a Soil Sensitive Area identified as loess soils. 17.3.5.3. A filled area must be designed, constructed and maintained so it is stable and remains effective after completion of filling. 17.3.5.4. Water control measures and sediment control measures must be designed, constructed and maintained in a fill area, such that the area is stable and the measures remain effective after completion of the filling. The diameter of any culvert used to drain a fill area must not be less than 300mm. 17.3.5.5. Wheeled or tracked machinery must not be operated in, or within 8m of, a river (except an ephemeral river or intermittently flowing river, when not flowing) or the coastal marine area. 17.3.6. Discharge of contaminants to air arising from burning in the open. 17.3.6.1. Only material generated on the same property or a property under the same ownership can be burned. 17 – 4