Volume Two 22. Lake Grassmere Salt Works Zone 22.2.2. Noise. 22.2.2.1. An activity, apart from salt harvest operations, must not cause noise that exceeds the following limits at the zone boundary: 7.00 am to 10.00 pm Monday to Sunday 55 dBA L Aeq At all other times 45 dBA L Aeq 75dBL AFmax 22.2.2.2. Noise from salt harvest operations, when measured at or beyond the Lake Grassmere Salt Works Noise Control Boundary, which is a distance of 500 metres from the 'outside' edges of the salt crystallising ponds, must not exceed the following standards: 7.00 am to 10.00 pm Monday to Sunday 55 dBA L Aeq At all other times 45 dBA L Aeq 75dBL AFmax 22.2.2.3. Noise must be measured in accordance with the provisions of NZS 6801:2008 Acoustics – Measurement of Environmental Sound, and assessed in accordance with NZS 6802:2008 Acoustics – Environmental Noise. 22.2.2.4. Construction noise must not exceed the recommended limits in, and must be measured and assessed in accordance with, NZS 6803:1999 Acoustics – Construction Noise. 22.2.3. Odour. 22.2.3.1. The odour must not be objectionable or offensive, as detected at or beyond the legal boundary of the area of land on which the permitted activity is occurring. 22.2.4. Smoke. 22.2.4.1. The smoke must not be objectionable or offensive, as detected at or beyond the legal boundary of the area of land on which the permitted activity is occurring. 22.2.5. Dust. 22.2.5.1. The best practicable method must be adopted to avoid dust beyond the legal boundary of the area of land on which the activity is occurring. 22.2.6. Dust from any process vent or stack. 22.2.6.1. The dust must not contain hazardous substances. 22.2.6.2. The particulate discharge rate from any air pollution control equipment and dust collection system must not exceed 250mg/m at any time, corrected to 0°C, 1 3 atmosphere pressure, dry gas basis. 22.2.6.3. Dust particles must not exceed 0.05mm size in any direction. 22.3. Standards that apply to specific permitted activities 22.3.1. Solar production, refining, handling, packaging, storage and sale of salt and associated by-products. 22.3.1.1. The best practicable method must be adopted to contain the spread of brine into soil beyond the boundaries of the zone. 22 – 3