Marlborough Sounds Resource Management Plan 14 September 2006 Measurements are to be made immediately above or upstream of the discharge and below the discharge after reasonable mixing. For a description of the two methods refer to the Ministry for the Environment Water Quality Guidelines No. 2, Guidelines for the Management of Water Colour and Clarity, June 1994. See Chapter 25 Definitions for the definition of Reasonable Mixing. + Objectionable odour Shall not be emitted No numeric interpretation available + Suitability for consumption by Shall not be rendered No numeric interpretation available farm anim als unsuitable + Aquatic life Shall not be any significant Light Penetration adverse effects In water deeper than half the euphotic depth, the euphotic depth shall not be changed by more than 10%. In waters shallower than half the euphotic depth, the lighting at the bed shall not be reduced by more than 20%. Ammonia Toxicity The four-day average concentration of total ammonia shall not exceed the following values Total Ammonia, NH4- -N (g/m³) pH <15°C 20° 25° 7.50 1.81 1. 23 0.86 7.7 5 1.6 4 1.15 0.81 8.0 0 1.0 9 0.76 0.54 8.2 5 0.62 0.44 0.32 8.5 0 0.36 0.26 0.19 Note that daily average based on single sample taken noon - 2pm (NZST) Particulate Organic Material The daily average concentration of particulate organic matter shall not exceed 4g/m³ Temperature Shall not be chang ed by N/ A more than 3°C. Shall not exceed 20°C. (Note that this is more stringent than the 25°C in the RMA Third Schedule) Dissolved Oxygen Shall exceed 80% N/ A of saturation Suitability of fish for human Shall not be rendered No numeric interpretation available consumption unsuitable by the presence of contaminants F1 - CLEAR WATER MANAGED FOR FISHERY PURPOSES + Conspicuous oil, or grease films, Shall not be produced No numeric interpretation available scums or foams, or floatable or suspended materials + Colour or visual clarity Shall not change Hue shall not be changed by more than 10 points on the Munsell scale. App H - 2