List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.
ELEMENTS | PERFORMANCE CRITERIA |
Elements describe the essential outcomes | 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 of conditions section. |
1. Monitor chloramination process performance | 1.1 Conduct and analyse process tests and compare performance to plant operational requirements. 1.2 Collect samples and test chlorine residuals. 1.3 Identify and report process faults and the operational condition of plant. |
2. Prepare and apply chloramination chemical dosing | 2.1 Use, handle and store chemicals. 2.2 Prepare chemical dosing according to system specifications and organisational requirements. 2.3 Maintain information related to chlorine and ammonia supply and usage. |
3. Operate and control chloramination processes | 3.1 Carry out routine plant inspections. 3.2 Make adjustments to dosing to optimise system performance. |
4. Complete documentation | 4.1 Collect and record process data. 4.2 Report observations outside defined parameters for further action. |
Evidence required to demonstrate competence must satisfy all of the requirements of the elements and performance criteria. If not otherwise specified the candidate must demonstrate evidence of performance of the following on at least one occasion.
operating control and chemical dosing equipment
performing chloramination process calculations including at least one of:
chlorine and ammonia dose rate
chlorine to ammonia ratio
dichloramine concentration
collecting samples and conducting tests including at least one of:
total chlorine
free chlorine
monochloramine
ammonia and hypochlorite strength
pH
analysing tests
identifying and reporting process and operational faults
monitoring chloramination systems
making appropriate system adjustments including at least one of:
flow rate
chlorine feed rate
ammonia feed rate
chlorine to ammonia ratio
calibration of chemical dosing equipment
preparing and applying chloramination chemical dosing, including at least one of:
liquefied chlorine gas
sodium hypochlorite
anhydrous ammonia
aqua ammonia
pH correcting chemicals including lime soda ash
sodium hydroxide
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.
microbiological aspects of water quality
chloramination process theory
chlorine and ammonia dosing equipment
operational problems including nitrification
lockout procedures for mechanical and electrical installations
risk factors and potential hazards associated with chloramination processes
equipment operation, capacity and limitations
control and communications systems
Competency should be assessed in an actual workplace or in a simulated environment, with access to equipment and infrastructure appropriate to the outcome. Competency should be demonstrated over time to ensure the candidate is assessed across a variety of situations.
Some components of this unit require assessment in a workplace environment therefore the unit is not suitable for fully external or electronic based assessment.
Consideration must be given to holistic assessment for this unit. Refer to advice in the companion volumes.
Assessors must satisfy the NVR/AQTF mandatory competency requirements for assessors.