3.1 Classification of trade waste discharges
Trade waste discharges shall be classified as one of the following types:
- controlled trade waste - trade waste for which standard conditions can be applied in a consent, refer Schedule 2
- conditional trade waste - trade waste that exceed the requirements for a controlled consent but are not a prohibited trade waste, see 3.1(c). Conditional consents shall include consents for temporary discharges
- prohibited trade waste - trade waste that contains, or is likely to contain, characteristics that are prohibited or are present in concentrations that are prohibited. Refer to Schedule 3.
3.2 Application for a trade waste consent
3.2.1 Every person who wishes to:
- discharge any trade waste into the wastewater system, or
- change the characteristics of a trade waste discharged under an existing consent, or
- change the conditions of an existing consent, or
- make a temporary discharge
shall make an application to the Council for a consent to discharge to the wastewater system.
3.2.2 An application shall be made using the prescribed application form obtainable from Council. The Council may determine the nature and content of the application form which may be altered or amended at any time.
3.2.3 The application form shall be accompanied by the application fee.
3.2.4 The application for consent will not be processed until the application fee is paid.
3.3 Consideration of an application by the Council
3.3.1 On receipt of any application for a consent the Council may require the applicant to provide further material, such as:
- additional information that the Council requires to assess the application. This information may require that any discharge is investigated and analysed as provided for in Part 4 of this Bylaw
- an independent review to verify any or all information supplied by the applicant
- a discharge management plan.
3.3.2 In considering any application for a consent and in imposing any conditions in the consent the Council shall take the quality, volume and rate of discharge of the trade waste into consideration in relation to the:
- health and safety of the Council staff, authorised agents, independent analysts and the public
- limits and/or maximum values for characteristics of trade wastes as specified in Schedules 2 and 3 of this Bylaw
- extent to which the trade waste may react with other trade waste or domestic wastewater to produce an undesirable effect
- flows and velocities in the sewer or sewers in relation to the material or construction of the sewer or sewers
- capacity of the sewers in any wastewater catchment area and the capacity of any wastewater treatment works serving the catchment in which the trade waste is produced
- nature of the Council's wastewater treatment processes and the degree to which the trade waste is capable of being treated in the relevant wastewater treatment works
- existence of any statutory requirements relating to the conveyance, treatment or discharge of raw or treated wastewater to receiving waters, the disposal of sewage sludge and any discharge to air (including the necessity for compliance with any resource consent, discharge permit or receiving water quality guidelines)
- amenability of the trade waste to pretreatment
- existing pretreatment works on the premises and the potential for their future use.
3.3.3 In considering any application for a consent and imposing any conditions in the consent the Council shall take into account other consideration such as:
- the applicant has a waste minimisation and management programme in operation that complies with the New Zealand Waste Strategy and its guidelines and any Council Waste Management Plan
- there are multiple drainage connections to the sewer from a single trade waste process or where two or more trade waste processes are involved with separate drainage connections to the sewer
- there are any other existing or possible future discharges.
3.4 Decision on an application
The Council shall, after considering the matters in 3.3.2 and 3.3.3, do one of the following:
- grant the application as a controlled consent
- grant the application as a conditional consent
- decline the application.
3.5 Conditions of a consent
3.5.1 The general conditions of consent set out in Schedule 1 shall apply to all consents issued by the Council under 3.4.
3.5.2 Any consent to discharge may be granted or renewed subject to such other conditions the Council may impose relating to the:
- particular public sewer or sewers to which the discharge will be made
- maximum daily volume of the discharge, the maximum rate of discharge and the duration of maximum discharge
- maximum limit or permissible range of any specified characteristics of the discharge, including concentration limits as in Schedules 2 and 3 or such lesser amount as specified in the consent and mass limits determined in accordance with Part 4 of this Bylaw
- period or periods of the day during which the discharge, or a particular concentration, or volume of discharge may be made
- characteristics of the trade waste at the point of discharge
- provision of separate sewers to conduct trade and domestic wastewater separately to the Council wastewater system
- provision, maintenance and operation by the consent holder of screens, grease traps, oil traps, silt traps, other partial or preliminary pretreatment processes, equipment or storage facilities designed to regulate the quality, quantity and rate of discharge or other characteristic prior to the point of discharge
- provision and maintenance of inspection chambers, manholes or other apparatus or devices to provide reasonable access to private sewers for flow measurement, sampling and inspection
- establishment of a sampling and testing programme and flow measurement requirements
- stipulation of which of the methods set out in 5.5 and 5.6 are to be used for the taking of samples of the discharge and for measuring or estimating flow rates for use in determining discharge quality and the amount of any trade waste charges applicable to that discharge
- provision and maintenance by the consent holder of such meters or devices as may be required to measure the volume or flow rate of any trade waste being discharged from the premises and for the testing of such meters
- provision and maintenance of such services, (whether electricity, water or compressed air or otherwise), which may be required in order to operate meters and similar devices
- provision by the consent holder of a discharge management plan
- provision by the consent holder of water use data, waste flow data etc
- consent holder's use of third parties for treatment, carriage, discharge and disposal of by-products of pretreatment of trade wastes
- requirement to provide a bond or insurance in favour of the Council where failure to comply with the consent could result in damage to the Council's sewage system, its treatment plants, or could result in the Council being in breach of any statutory obligation
- meeting of any other conditions reasonably necessary to achieve or ensure compliance with this Bylaw.
3.6 Technical review and variation
3.6.1 The Council may at any time during the term of a consent, by written notice to the consent holder, vary any condition within the consent to address such issues as a change in the:
- nature of the discharge
- wastewater system
- circumstances that cause the condition(s) to become inappropriate or unnecessary
- resource consent limits imposed on the discharges or the use of liquids or solids from the Council's treatment plant
- legal requirements imposed on the Council.
3.6.2 The consent holder may seek to vary any condition of a consent at any time during the term of a consent by written application to the Council, as provided for in 3.2 of this Bylaw.
3.7 Suspension or cancellation of a consent
3.7.1 The Council may suspend or cancel any consent immediately by giving written notice to the consent holder, if the:
- Council is lawfully directed to suspend or cancel the consent
- consent holder discharges any trade waste unlawfully which the Council determines may endanger the health or safety of any person, damage any part of the wastewater system or cause serious environmental effects as a result of the discharge
- discharge is not effectively controlled to be in accordance with the requirements of a consent
- discharge contains any prohibited substance.
3.7.2 The Council may suspend or cancel any consent by giving fifteen working-days written-notice to the consent holder, if the consent holder fails to:
- comply with any condition of the consent
- maintain effective control over the discharge
- limit the volume, nature, or composition of trade waste being discharged in accordance with the requirements of the consent
- take any action which in the opinion of the Council, threatens the safety of, or threatens to cause damage to any part of the wastewater system or the treatment plant or threatens the environment or the health or safety of any person
- any charges due under this bylaw.
3.7.3 The Council may suspend or cancel any consent, by giving fifteen working-days notice to the consent holder for circumstances other than those in sections 3.7.2 (a)-(d) where it is in the public interest to do so.