C hapter 9 - C oastal M arine • Degree of stratification in the water column which may limit vertical mixing; • Tidal and wind-driven currents; • Rate of breakdown and inactivation of the waste; • Topography of the coastline; and • Mixing characteristics within the waterbody itself. Review The Council will within one year of the Plan becoming operative consider whether or not it is appropriate to review the conditions of existing discharge permits, pursuant to section 128(1)(b) of the Act, in order to enable the water quality standard (SG) to be met. When considering whether these discharges need to be upgraded the Council will consider: • The adverse effects associated with the discharge; • Any geographical or technical difficulties involved; and • The likely costs that will be imposed on consent holders by the upgrading of the discharge. For discharges that the Council considers need to be upgraded, the Council will establish reasonable timeframes within which existing discharges will be upgraded. Enforcement The Council will initiate a programme to ensure that unlawful discharges in the coastal marine area are discontinued or a resource consent in respect of the discharge is obtained. Liaison The Council will liaise with the Port Company to establish additional litter, boat maintenance residue and boat sewage disposal facilities as necessary. Education The Council will implement an education and awareness programme addressing the adverse effects of discharging from boats. As a part of this, boat operators will be actively encouraged to provide holding tanks and/or plant for treatment of waste prior to discharge. Support The Council will in conjunction with interested persons/ organisations, organise or support beach clean up operations as required. National/Other The Council will implement the Resource Management Controls (Marine Pollution) Regulations 1998 in relation to discharges from ships and offshore installations. In accordance with the Maritime Transport Act 1994, the Council will implement a Tier II Oil Spill Contingency Plan to mitigate the adverse effects of oil pollution in the coastal marine area. Monitoring The Council will undertake a comprehensive coastal water quality monitoring programme in conjunction with other relevant agencies that involves: 9 - 13