Marlborough Sounds Resource Management Plan 25 July 2014 39.1.3.3 Stormwater Discharges (Point source and Non Point Source) The discharge of point source stormwater, to land or natural water, by gravity and/or the discharge of non point source stormwater, to land or any natural water shall be a Permitted Activity provided that; a) The discharge shall not cause any significant erosion or inundation of land; b) The discharge shall not have any significant adverse effect on water quality; c) The discharge shall not have any adverse effect on any fisheries, wildlife habitats or recreational values of any waterbody; and 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 contaminants 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. Note: The discharge of stormwater into the Coastal Marine Area is dealt with by the rules in the Coastal Marine Zone. 39.1.4 Land Disturbance 39.1.4.1 Land Disturbance - General Conditions Any land disturbance activity which meets the following conditions is a Permitted Activity. 39.1.4.1.1 Conditions a) Any increase in the concentration of suspended sediment shall not be more than 20% as measured by the ‘black disk’ method, notwithstanding that the concentration of suspended sediment in run-off water shall not exceed 200 grams/cubic metre at any point of discharge to any receiving water. The effects on the receiving water are to be measured at a distance downstream of two widths of the receiving watercourse or 50 metres, whichever is the lesser; b) No woody material of greater than 100mm diameter shall be left in any permanently flowing river, lake, wetland or sea as a result of a land disturbance operation; and c) All land disturbance sites are to be stable when subject to a storm event of 10% probability or less. 39 - 4