2 October 2014 Chapter 36 - Rural Zones One and Two • 250 metres of any other bird-scaring device; or • a radius of 800 metres of any public or private hospital. c) No bird-scaring device shall: • Be set to operate at any greater frequency than 12 times in any period of one hour; or • Be operated between 1900 hours and 0630 hours prior to the introduction of daylight saving and 2000 hours and 0700 hours during daylight saving hours. 36.1.3.4.2.3 Noise Sensitive Activities a) Any new dwelling house, visitor accommodation or other habitable building located within 300 metres of any frost fan not within the same site shall 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 more than 200m from the nearest frost fan DnT,w + Ctr50-3150 ≥27 d B Dwellings located less than 200m and more than100m from the nearest frost fan DnT,w + Ctr50-3150 ≥32 dB Dwellings located less than 100m from the nearest frost fan DnT,w + Ctr50-3150 ≥37 dB b) For the purposes of this rule, "external building envelope" means an envelope defined by the outermost physical parts of the building, normally the cladding and roof. c) Sub-clauses a) and b) of this rule shall also apply to any alteration of an existing dwelling house, visitor accommodation or other habitable building located within 300 metres of the closest frost fan selected for the purpose of sub-clause a) of this rule, where a new bedroom forms part of the alteration. For the avoidance of doubt only the new bedroom has to be treated in accordance with paragraphs a) and b) of this rule. d) For the purpose of this rule, "frost fan" includes any lawfully established frost fan, and includes a proposed frost fan for which a resource consent has been granted and "site" has the meaning of "single land holding". 36.1.3.4.2.4 Rural Activities Activities in Rural Zones One and Two required by normal rural practice provided that the activity shall be no louder than necessary, and shall comply with the requirements of section 16 of the Act. 36.1.3.4.2.5 Blasting 36.1.3.4.2.5.1 Airblast Overpressure Airblast overpressure from blasting on any land shall not exceed a peak non- frequency weighted (Linear or Flat) level of 115 dBA, provided this level may be exceed by up to 5% of the total number of blasts over any 12 month period. The level should not exceed 120 dB (Linear Peak) at any time. 36 - 5