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Elements and Performance Criteria

1. Plan and prepare work
   • Determine work requirements from specifications, instructions and pre-work inspections.
   • Conduct risk assessment for environment, safety and water quality factors.
   • Select and check equipment and personal protective equipment to meet safety requirements of task and site.
   • Determine size of area to be disinfected.
   • Perform calculations to establish dose rate and target residual and contact time.
2. Conduct disinfection
   • Set up equipment at injection point.
   • Commence dosing at predetermined dose rate.
   • Perform residual measurement to ensure the target residual is being met.
   • Achieve contact time and stop dosing.
   • Operate the dosing equipment.
3. Finalise work
   • Collect samples ensuring that types, locations and times comply with requirements.
   • Prepare samples for laboratory testing according to requirements.
   • Check, maintain and store equipment, tools and materials.
   • Restore the worksite and complete and submit workplace records.
4. Plan and prepare work
   • Determine work requirements from specifications, instructions and pre-work inspections.
   • Conduct risk assessment for environment, safety and water quality factors.
   • Select and check equipment and personal protective equipment to meet safety requirements of task and site.
   • Determine size of area to be disinfected.
   • Perform calculations to establish dose rate and target residual and contact time.
5. Conduct disinfection
   • Set up equipment at injection point.
   • Commence dosing at predetermined dose rate.
   • Perform residual measurement to ensure the target residual is being met.
   • Achieve contact time and stop dosing.
   • Operate the dosing equipment.
6. Finalise work
   • Collect samples ensuring that types, locations and times comply with requirements.
   • Prepare samples for laboratory testing according to requirements.
   • Check, maintain and store equipment, tools and materials.
   • Restore the worksite and complete and submit workplace records.

Range Statement

Network assets include:

network mains and services network storages bores

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Performance Evidence

Evidence required to demonstrate competence must satisfy all of the requirements of the elements and performance criteria. The candidate must be assessed on at least one of the network assets within the Range of Conditions. If not otherwise specified the candidate must demonstrate evidence of performance of the following on at least one occasion.

conducting risk assessment

performing volumetric calculations

operating network mains

operating control valves and pump stations

handling of chlorine in different forms, including at least one of:

gas

liquid

solid

operating and maintaining chemical dosing equipment

operating of analytical equipment

reading maps and diagrams

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Knowledge Evidence

Evidence required to demonstrate competence must satisfy all of the requirements of the elements and performance criteria. If not otherwise specified the depth of knowledge demonstrated must be appropriate to the job context of the candidate.

safe limits of disinfectant residual

water network operation

principles of chlorination and chloramination

basic water chemistry

interrogation of SCADA system

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