The Permit to Work (PtW) system allows you to apply to work on the Christchurch Wastewater Treatment Plant (CWTP).
The Christchurch Wastewater Treatment Plant (CWTP) contains many hazards and access is strictly controlled. All Council contractors must have a valid CWTP permit to work when working in the CWTP process areas.
The permit system ensures that we:
CWTP permits are held by the Council and are distributed to all staff at CWTP. The permit information helps CWTP staff to complete any process reconfigurations and equipment isolations, know who to contact, and ensure that all people at CWTP go home safe and well. The maintenance contractor can use them to know what is happening, whom to contact and to ensure the safety of staff on-site.
CWTP permits also notify the applicant of any special conditions and precautions they should take in doing the work to ensure that the CWTP continues to function correctly and safely.
Before submitting the permit to work application, you may also require an approved automation change request(external link) if the work involves electrical work, automation, SCADA, control systems, calibration or instrumentation. A permit-to-work application requiring this work will not be processed without an approved automation change request.
Contractors wishing to carry out any work in the CWTP process areas, or any high-risk activities at CWTP.
Subcontractors, please note that all CWTP permit-to-work applications must be submitted by the Head Contractor.
Use the below to help identify any risks associated with your activities and whether a permit is required.
A Permit to Work (PTW) is mandatory where a yes has been listed in the PTW required column. Where 'To be confirmed' is noted the permit receiver and permit issuer must discuss controls with the permit issuer to determine if a permit is required.
|Confined space permit to work||PTW required||PTW required and notify Mahi Haumaru Aotearoa (Worksafe)|
|Are you entering a restricted space that is enclosed or partially enclosed that is not intended or designed as a regular place of work?||Yes||No|
|Are you entering a restricted space that is enclosed or partially enclosed that could have harmful levels of contaminants, oxygen deficiency or excess, or could cause engulfment or drowning?||Yes||No|
|Will your head enter the confined space?||Yes||No|
|Craneage permit to work||PTW required||PTW required and notify Mahi Haumaru Aotearoa (Worksafe)|
|Will you be using a crane or any lifting appliance including a Hiab (or equivalent)?||Yes||No|
|Will you be using a hoist block on a fixed rail or wire?||No||No|
|Will you be using a stacker or conveyor whereby a load is moved by means of a belt or platform?||No||No|
|Will you be using earth-moving, mineral-moving or excavating appliances not fitted with a grab unless it has been specifically designed to lift loads?||No||No|
|Excavation permit to work||PTW required||PTW required and notify Mahi Haumaru Aotearoa (Worksafe)|
|Will you be digging, excavating, or breaking the ground in any way?||Yes||No|
|Are you doing any demolition to any building or structure that involves non-minor structural alterations?||Yes||No|
|Is there potential to break through into a wall cavity or through the wall thickness?||Yes||No|
|Are you digging trenching or shaft more than 1.5m deep and which has a depth greater than the horizontal width at the top?||Yes||Yes|
|Are you working in an excavation where ground cover will be overhead?||Yes||Yes|
|Will the excavation have a face with a vertical height of more than 5 metres, and an average slope steeper than a ratio of 1 horizontal to 2 vertical?||Yes||Yes|
|Hot works permit to work||PTW required||PTW required and notify Mahi Haumaru Aotearoa (Worksafe)|
|Will you be applying heat, using a naked flame, an open heat source, or work that produces sparks?||Yes||No|
|Will you be cutting with a rotary disk or grinding equipment, soldering, brazing or using a heat gun?||Yes||No|
|Will you be using gas, welding, arc welding, or oxyacetylene welding equipment, including cutting with the equipment?||Yes||No|
|Is there a potential source of ignition?||Yes||No|
|Working at height permit to work||PTW required||PTW required and notify Mahi Haumaru Aotearoa (Worksafe)|
|Will you be working at a height of less than three metres?||No||No|
|Will you be working at a height of three metres and above?||To be confirmed||No|
|Will you be working at a height of five metres or more?||Yes||Yes|
Contractors must apply for special permits for the following high-risk activities:
If in doubt, contact us(external link) to enquire whether a permit is required.
We'll endeavour to assess your request within five working days to confirm one of the following options:
Please be aware that approved permits may change in status to one of the following options:
Please be aware that the permit to work only assesses whether the work impacts the correct and safe operation of the CWTP. It is important to note that the permit to work: