4. Coastal Environment Zone Volume Two 7.00 am to 10.00 pm 65 dBA L Aeq 10.00 pm to 7.00 am 65 dBA L Aeq 75dBL AFmax 4.2.2.2. An activity undertaken within the Coastal Environment Zone must be conducted to ensure that noise arising at or within the boundary of any land zoned Urban Residential 1, Urban Residential 2 (including Greenfields), Urban Residential 3 or within the notional boundary of any dwelling on land zoned Rural Living, Coastal Living or Coastal Environment does not exceed the following noise limits: 7.00 am to 10.00 pm 50 dBA L Aeq 10.00 pm to 7.00 am 40 dBA L Aeq 70dBL AFmax 4.2.2.3. The following activities are excluded from having to comply with the noise limits: (a) mobile machinery used for a limited duration as part of agricultural or horticultural activities occurring in the Coastal Environment Zone; (b) any fixed motors or equipment, frost fans or gas guns, milling or processing forestry activities, static irrigation pumps; motorbikes that are being used for recreational purposes. 4.2.2.4. Noise emissions from any generator or wind powered equipment used solely for electricity generation must be operated so that noise emissions measured at the notional boundary of any dwelling in any zone must not exceed 55 dBA L Aeq (15 min) at all times. 4.2.2.5. Noise must be measured in accordance with NZS 6801:2008 Acoustics – Measurement of Environmental Sound, and assessed in accordance with NZS 6802:2008 Acoustics – Environmental Noise. 4.2.2.6. Construction noise must not exceed the recommended limits in, and must be measured and assessed in accordance with, NZS 6803:1999 Acoustics – Construction Noise. 4.2.3. Noise sensitive activity. 4.2.3.1. Any new noise sensitive activity located within 300m of any frost fan not within the same site must be designed and constructed so that within the external building envelope surrounding any bedroom (when the windows are closed), airborne sound insulation meets the following single-number rating for airborne sound insulation, determined in accordance with AS/NZS ISO 717.1:2004 Acoustics – Rating of sound insulation in buildings and of building elements Part 1 – Airborne sound insulation: Dwellings located less than 300m and DnT,w + Ctr50-3150 ≥ 27 dB more than 200m from the nearest frost fan Dwellings located less than 200m and DnT,w + Ctr50-3150 ≥ 32 dB more than 100m from the nearest frost fan Dwellings located less than 100m from the DnT,w + Ctr50-3150 ≥ 37 dB nearest frost fan 4.2.3.2. For the purposes of Standard 4.2.3.1, "external building envelope" means an envelope defined by the outermost physical parts of the building, normally the cladding and roof. 4 – 6