Volume Two 4. Coastal Environment Zone 4.3.20.2. After reasonable mixing, the entering onto or passing across the bed of a river by livestock must not cause any conspicuous change in the colour or visual clarity of a flowing river, measured as follows: (a) hue must not be changed by more than 10 points on the Munsell scale; (b) the natural clarity must not be conspicuously changed due to sediment or sediment laden discharge originating from the activity site; (c) the change in reflectance must be <50%. 4.3.20.3. After reasonable mixing, the entering onto or passing across the bed of a river by livestock must not result in a change in concentration of following: (a) daily average carbonaceous BOD5 due to dissolved organic compounds (i.e. those passing a GF/C filter); (b) dissolved reactive phosphorus; (c) dissolved inorganic nitrogen; (d) Escherichia coli (E. coli). 4.3.21. Application of an agrichemical into or onto land. 4.3.21.1. The agrichemical must be approved for use under the Hazardous Substances and New Organisms Act 1996. 4.3.21.2. The application must not result in the agrichemical being deposited in or on a river, lake, Significant Wetland or drainage channel that contains water. 4.3.21.3. 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. 4.3.21.4. The application must be carried out in accordance with Sections 5.3 and 5.5 of NZS 8409:2004 Safe Use of Agricultural Compounds and Plant Protection Products – Management of Agrichemicals. 4.3.22. Application of fertiliser or lime into or onto land. 4.3.22.1. Fertiliser must be stored on an impermeable, bunded surface and covered at all times. 4.3.22.2. The application must not result in the fertiliser being deposited in or on a river, lake, Significant Wetland or drainage channel that contains water. 4.3.22.3. Total cumulative nitrogen (N) loading on the areal extent of land used for the application must not exceed 200 kg N/ha/year (excluding N from direct animal inputs. 4.3.22.4. The application must not occur when the soil moisture exceeds field capacity. 4.3.22.5. All reasonable care must be exercised with the application so as to ensure that the fertiliser or lime must not pass beyond the legal boundary of the area of land on which the fertiliser or lime is being applied. 4.3.23. Application of a vertebrate toxic agent by hand into or onto all land, or application of a vertebrate toxic agent by air on private land. 4.3.23.1. The agent must be approved for use under the Hazardous Substances and New Organisms Act 1996. 4 – 17