21 August 2008 Chapter 33 - Port Zone Figure 2: Havelock Port Noise Assessment Locations and Existing Levels 33.1.4.1.4 Construction Noise Construction noise shall not exceed the recommended limits in and shall be measured and assessed in accordance with the provisions of NZS6803P:1984 The Measurement and Assessment of Noise from Construction, Maintenance and Demolition Work. 33.1.4.2 Blasting 33.1.4.2.1 Airblast Overpressure Airblast overpressure from blasting on any land shall not exceed a peak non- frequency weighted (Linear or Flat) level of 115 dB, 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. 33.1.4.2.2 Vibration Vibration from a site due to blasting shall not exceed a peak particle velocity of 5mm per second provided this level may be exceeded on up to 5% of the total number of blasts over a period of 12 months. The level shall not exceed 10mm per second at any time. 33 - 7B