Noise Management Plan - Port Nelson

APPENDIX C DEFINITIONS
“Acoustic Treatment” means acoustic treatment of a residential property that achieves an indoor design level
of 40 dBA Ldn (5 day) within all living area(s) and all bedroom(s), either with ventilating windows open or with
mechanical ventilation installed and operating, when port noise is at or below the certified level of port noise.
Acoustic treatment shall include the cost of testing and obtaining an acoustic certificate.
“Best practicable option” in relation to a discharge of a contaminant or an emission of noise, means the best
method of preventing or minimising the adverse effects on the environment having regard, among other
things, to:
d) the nature of the discharge or emission and the sensitivity of the receiving environment to adverse
effects, and
e) the financial implications, and the effects on the environment, of that option when compared with
other options, and
f) the current state of technical knowledge and the likelihood that the "option can be successfully
applied.
“dBA” means the A-frequency-weighted sound pressure level in decibels relative to a reference sound
pressure of 20 micropascals. See NZS 6801:1991 clause 2.1 definition of frequency, sound pressure, reference
sound pressure, sound pressure level, decibel, weighting, and sound level.
“Environmental Officer” is the Noise Officer appointed by the Port Operator pursuant to this Port Noise
Management Plan.
“Environmental Aspect” means a feature or characteristic of an activity, product or service that affects or can
affect the environment.
“ISO 14001” is a series of documents relating to the implementation of an Environmental Management System
(EMS ). ISO 14001:2004 is the document which defines the requirements for the EMS and provides guidance
for its use.
“L90” means the L90 exceedance level, in A-frequency-weighted decibels, which is equalled or exceeded, 90
percent of the total measurement time. See NZS 6801:1991 clause 2.2 definition of exceedance level.
”Leq” in decibels, is the value of the steady continuous A-weighted sound pressure level that, within the
relevant measurement time interval, has the same mean square sound pressure as the sound under
consideration, the level of which varies over time.
Port Nelson Noise Management Plan Page 28