Noise means the standard deviation of the fluctuations in CTN expressed as a percentage of the attenuation coefficient of water. Its estimate (Sn) is calculated using the following expression:
Obstruction means any circumstance relating to the whole or any part of the Infrastructure, including Rollingstock, debris or other objects on the Infrastructure, which has the potential to cause a disruption to or cancellation of Train Services or Train Movements, and includes any Network Incident but does not include an Operational Constraint imposed by Aurizon Network.
Loading means the quantity of a specific substance present per unit of surface area, such as the amount of lead in micrograms contained in the dust collected from a certain surface area divided by the surface area in square feet or square meters.
Plumbing means plumbing as defined in Section 1(1) of the Act.
Slug loading means any pollutant, including oxygen demanding pollutants, released in a discharge at a flow rate and/or pollutant concentration as to cause interference in the POTW.