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Evidence Guide: NWPTRT052 - Operate and control hypochlorite disinfection processes

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

NWPTRT052 - Operate and control hypochlorite disinfection processes

What evidence can you provide to prove your understanding of each of the following citeria?

Plan and prepare for work

  1. Determine work requirements from job specification and plans.
  2. Select and check equipment and hypochlorite supplies to meet safety requirements of task and site.
  3. Select, fit and use personal protective equipment.
  4. Handle and store hypochlorite chemicals to maximise shelf life and reduce loss of available chlorine.
  5. Conduct the percentage available chlorine test.
Determine work requirements from job specification and plans.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Select and check equipment and hypochlorite supplies to meet safety requirements of task and site.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Select, fit and use personal protective equipment.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Handle and store hypochlorite chemicals to maximise shelf life and reduce loss of available chlorine.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Conduct the percentage available chlorine test.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Monitor process performance

  1. Monitor hypochlorite disinfection processes according to agreed schedule and procedures.
  2. Collect samples and conduct process tests.
  3. Make process adjustments as required to maintain effectiveness of hypochlorite disinfection.
Monitor hypochlorite disinfection processes according to agreed schedule and procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Collect samples and conduct process tests.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Make process adjustments as required to maintain effectiveness of hypochlorite disinfection.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply chemical dosing

  1. Prepare and apply hypochlorite chemicals.
  2. Control hypochlorite dosing to maintain required residual.
Prepare and apply hypochlorite chemicals.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Control hypochlorite dosing to maintain required residual.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete documentation

  1. Maintain information relating to hypochlorite supply and usage.
  2. Collect and record process data.
  3. Report observations outside defined parameters for further action.
Maintain information relating to hypochlorite supply and usage.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Collect and record process data.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Report observations outside defined parameters for further action.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Plan and prepare for work

  1. Determine work requirements from job specification and plans.
  2. Select and check equipment and hypochlorite supplies to meet safety requirements of task and site.
  3. Select, fit and use personal protective equipment.
  4. Handle and store hypochlorite chemicals to maximise shelf life and reduce loss of available chlorine.
  5. Conduct the percentage available chlorine test.
Determine work requirements from job specification and plans.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Select and check equipment and hypochlorite supplies to meet safety requirements of task and site.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Select, fit and use personal protective equipment.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Handle and store hypochlorite chemicals to maximise shelf life and reduce loss of available chlorine.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Conduct the percentage available chlorine test.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Monitor process performance

  1. Monitor hypochlorite disinfection processes according to agreed schedule and procedures.
  2. Collect samples and conduct process tests.
  3. Make process adjustments as required to maintain effectiveness of hypochlorite disinfection.
Monitor hypochlorite disinfection processes according to agreed schedule and procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Collect samples and conduct process tests.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Make process adjustments as required to maintain effectiveness of hypochlorite disinfection.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Apply chemical dosing

  1. Prepare and apply hypochlorite chemicals.
  2. Control hypochlorite dosing to maintain required residual.
Prepare and apply hypochlorite chemicals.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Control hypochlorite dosing to maintain required residual.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Complete documentation

  1. Maintain information relating to hypochlorite supply and usage.
  2. Collect and record process data.
  3. Report observations outside defined parameters for further action.
Maintain information relating to hypochlorite supply and usage.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Collect and record process data.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Report observations outside defined parameters for further action.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

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. Plan and prepare for work

1.1 Determine work requirements from job specification and plans.

1.2 Select and check equipment and hypochlorite supplies to meet safety requirements of task and site.

1.3 Select, fit and use personal protective equipment.

1.4 Handle and store hypochlorite chemicals to maximise shelf life and reduce loss of available chlorine.

1.5 Conduct the percentage available chlorine test.

2. Monitor process performance

2.1 Monitor hypochlorite disinfection processes according to agreed schedule and procedures.

2.2 Collect samples and conduct process tests.

2.3 Make process adjustments as required to maintain effectiveness of hypochlorite disinfection.

3. Apply chemical dosing

3.1 Prepare and apply hypochlorite chemicals.

3.2 Control hypochlorite dosing to maintain required residual.

4. Complete documentation

4.1 Maintain information relating to hypochlorite supply and usage.

4.2 Collect and record process data.

4.3 Report observations outside defined parameters for further action.

Required Skills and Knowledge

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. Plan and prepare for work

1.1 Determine work requirements from job specification and plans.

1.2 Select and check equipment and hypochlorite supplies to meet safety requirements of task and site.

1.3 Select, fit and use personal protective equipment.

1.4 Handle and store hypochlorite chemicals to maximise shelf life and reduce loss of available chlorine.

1.5 Conduct the percentage available chlorine test.

2. Monitor process performance

2.1 Monitor hypochlorite disinfection processes according to agreed schedule and procedures.

2.2 Collect samples and conduct process tests.

2.3 Make process adjustments as required to maintain effectiveness of hypochlorite disinfection.

3. Apply chemical dosing

3.1 Prepare and apply hypochlorite chemicals.

3.2 Control hypochlorite dosing to maintain required residual.

4. Complete documentation

4.1 Maintain information relating to hypochlorite supply and usage.

4.2 Collect and record process data.

4.3 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. The candidate must be assessed in at least one type of process, in at least one type of technology and in at least one type of dosing procedure listed in the Range of Conditions. If not otherwise specified the candidate must demonstrate evidence of performance of the following on at least one occasion.

applying policies, standard operating procedures and regulatory standards

performing work-related calculations

identifying and responding to process faults and control system faults

identifying hazards

performing hypochlorite tests and chlorine residual sampling and testing

interpreting safety data sheets (SDS)

monitoring, operating and reporting on hypochlorite disinfection systems

selecting and using appropriate tools and equipment, including personal protective equipment

collecting and reporting process data

preparing and applying hypochlorite dosing safely

performing process calculations, including at least one of:

feed rate

dosage

Ct

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.

properties and chemistry of hypochlorite chemicals

effects of pH, time, temperature, UV exposure and impurities on hypochlorite breakdown

microbiological guidelines

reactions with water to produce hypochlorous acid/hypochlorite ion

impact of pH

chlorine demands, including:

ammonia

natural organic matter (NOM)

turbidity

iron, manganese and nitrite

disinfection by-products (DBP)

breakpoint

contact time

hypochlorite dosing system layout for sodium hypochlorite and/or calcium hypochlorite dosing systems

hazardous substances handling

risk factors and potential hazards associated with hypo chlorination

work-related hypochlorite calculations

hypochlorite dosing processes

automatic feed rate control systems

SDS

Range Statement

Processes include:

sodium hypochlorite solution

sodium hypochlorite

Technologies include:

calcium hypochlorite granules

calcium hypochlorite tablets

Dosing procedures include:

chlorinator shutdown, start up and isolation

purging operations

leak testing

dosing pump checks