Modification History
NWP409A Release 2: Layout adjusted. No changes to content.
NWP409A Release 1: Primary release.
Unit Descriptor
This unit of competency describes the outcomes required to review, coordinate and optimise chemical addition processes and to evaluate and report on system performance and process quality control.
Application of the Unit
This unit is required by technical staff with a responsibility for optimising chemical addition processes in water, wastewater and stormwater treatment plants and processes. This role may be a single operator or may be performed as part of a team with some responsibility for team coordination and supervision depending on the size of the treatment plant.
Licensing/Regulatory Information
Not applicable.
Pre-Requisites
Not applicable.
Employability Skills Information
This unit contains employability skills.
Elements and Performance Criteria Pre-Content
Elements describe the essential outcomes of a unit of competency. |
Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold italicised text is used, further information is detailed in the range statement. Assessment of performance is to be consistent with the evidence guide. |
Elements and Performance Criteria
ELEMENT |
PERFORMANCE CRITERIA |
1 Evaluate coagulation and flocculation process performance . |
1.1 Review existing process performance data against relevant organisational and legislative requirements . 1.2 Identify the impact of changing raw water quality on chemical addition processes as required. 1.3 Identify and coordinate any additional sampling and testing required for valid evaluation of current process performance. |
2 Investigate chemical addition plant configuration . |
2.1 Review existing fault reports and other relevant plant asset information. 2.2 Investigate the operational status of plant components with reference to manufacturers' and plant designers' specifications . 2.3 Carry out plant configuration investigations to identify potential deficiencies. |
3 Investigate chemical options for process optimisation . |
3.1 Review current chemical addition practices with reference to organisational procedures to identify potential deficiencies. 3.2 Investigate dosing options for current chemicals . 3.3 Identify and investigate new or additional chemicals and related dosing options. |
4 Develop and record a plan for process optimisation . |
4.1 Determine plant configuration or chemical options for process optimisation. 4.2 Plan a trial to test the performance of the determined optimisation options. 4.3 Compile report with recommendations on optimisation options. |
Required Skills and Knowledge
This section describes the skills and knowledge required for this unit. |
Required skills :
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Required knowledge :
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Evidence Guide
The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package. |
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Critical aspects for assessment and evidence required to demonstrate competency in this unit |
The candidate should demonstrate the ability to review, coordinate and optimise chemical addition processes including:
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Context of and specific resources for assessment |
Access to the workplace and resources, including:
Where applicable, physical resources should include equipment modified for people with disabilities. Access must be provided to appropriate learning and assessment support when required. Assessment processes and techniques must be culturally appropriate, and appropriate to the language and literacy capacity of the candidate and the work being performed. Validity and sufficiency of evidence requires that:
Questioning will be appropriate to the skill levels of the operator and cultural issues that may affect responses to the questions, and will reflect the requirements of the competency and the work being performed. |
Range Statement
The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included. |
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Organisational or legislative requirements may include: |
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Changing raw water quality may include: |
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Testing may include: |
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Plant components may include: |
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Manufacturers' and plant designers' specifications may include: |
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Plant configuration may include: |
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Chemicals may include: |
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Unit Sector(s)
Not applicable.
Competency field
Treatment.