20 August 2015 Chapter 34 - Marina Zone 34.1.5.3 Discharges to Coastal Water 34.1.5.3.1 Water Quality Standard The water quality standard to be complied with by discharges to coastal water is the same as for shellfish gathering defined in the Act. After reasonable mixing and disregarding any natural variations; a) The natural temperature of the water shall not be changed by more than 3 degrees Celsius; b) The concentration of dissolved oxygen in the discharge shall exceed 80% of the saturation concentration; c) There shall be no undesirable biological growth as a result of any discharge of contaminant into the water; d) Aquatic organisms shall not be rendered unsuitable for human consumption by the presence of contaminants; and e) Any pH change, increase in the deposition of matter on the foreshore or seabed on discharge of contaminant into water shall not have any adverse effect on aquatic life. 34.1.5.3.2 Stormwater Discharges (Point Source and Non Point Source) 34.1.5.3.2.1 Point Source Stormwater 34.1.5.3.2.1.1 For a period extending five years from the date the Plan becomes operative, any existing, lawfully established discharge of point source stormwater into water in the coastal marine area is a Permitted Activity. 34.1.5.3.2.1.2 After this time the discharge of point source stormwater into the coastal marine area shall be a Controlled Activity 34.1.5.3.2.2 Non Point Source Stormwater The discharge of non point source water to land or any natural water shall be a Permitted Activity provided that: a) The discharge shall not cause any significant erosion of land; b) The discharge shall not have any significant effect on water quality; c) The discharge shall not have any adverse effect on any fisheries, wildlife habitats or recreational values of any waterbody; d) The discharge does not contain stormwater from an area where hazardous substances are stored unless: - Hazardous substances cannot enter the stormwater; or - There is an interceptor system in place to collect hazardous contami- nants or diverted contaminated stormwater to a trade waste system; e) The above provisions do not apply to the drainage of naturally occurring wetlands or lakes. 34.1.6 Taking and Use of Coastal Water The taking and use of water from the Marina Zone, not exceeding 3,000 cubic metres per day, is a Permitted Activity provided that the activity does not: a) Change natural water and sediment movement patterns; and b) Change natural water quality. 34 - 9