Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

DEFPH007A Mapping and Delivery Guide
Conduct chlorine dosing of water at the point of supply

Version 1.0
Issue Date: May 2024


Qualification -
Unit of Competency DEFPH007A - Conduct chlorine dosing of water at the point of supply
Description This unit covers the competency required to conduct chlorine dosing of water at the point of supply within the Australian Defence Force (ADF).
Employability Skills This unit contains employability skills. Pre-requisite Unit/sNil
Learning Outcomes and Application The application of this unit in the workplace includes chlorine dosing water at the point of supply to ensure chlorine disinfection residue levels meet the minimum standard for national drinking water guidelines.This unit of competency is applicable to preventive medicine personnel. This function is limited to the performance of tasks in accordance with organisational policies and procedures.
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.
Prerequisites/co-requisites Not applicable.
Competency Field
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities 		Slides
PPT 		Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Prepare for chlorine dosing
  • Chlorines are used, handled and stored in accordance with organisational policies and procedures
  • Chlorine residue level is established via field water testing
  • Chlorine residue level is compared with national drinking water guidelines and information related to chlorine concentration to determine chlorine demand
       
Element: Perform chlorine dosing
  • Chlorine dosing is conducted in accordance with organisational policies and procedures
  • Personal protective equipment is selected, fitted and used correctly
  • Dosing is monitored to maintain parameters of dosing to achieve desired chlorine residue level
  • Dosing faults are identified and acted on, in accordance with organisational policies and procedures
       
Element: Monitor chlorine dosing performance
  • Dosing samples are collected and field tested to confirm chlorine residue level and water quality
  • Dosing data is collected, recorded and reported according to organisational policies and procedures
  • Observations outside defined parameters are reported for further action
       


Evidence Required

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.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessment must confirm the ability to:

handle, store and used chlorine safely

accurately calculate chlorine dosing levels

identify and respond to dosing faults.

Consistency in performance

Competency should be demonstrated over a minimum of two assessment occasions.

Context of and specific resources for assessment

Context of assessment

Competency should be assessed in an actual workplace situation. This may be in an urban or a field setting.

Specific resources for assessment

Access is required to:

appropriate equipment and stores

relevant organisational policies and procedures.

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

This describes the essential skills and knowledge and their level, required for this unit.

Required Skills

calculate chlorine dosing level

communicate appropriately about, consult on and impart knowledge of:

causes of disease transmission

causes of manpower wastage

control measures of disease transmission

safe water handling practices

water quality assurance measures

interpret data gathered in the field against quality standards in national water quality guidelines and organisational policy

liaise and communicate with persons in positions of authority

make technical judgements based on own level of knowledge and experience

measure chemicals accurately

prioritise tasking

work safely

Required Knowledge

aetiology of water-borne diseases

Australian Drinking Water Guidelines 2004 (National Health and Medical Research Council)

best use of available resources

causes of disease transmission

causes of manpower wastage

chlorine dosing levels per volume of water

control measures of disease transmission

documentation processes relevant to own workplace

handling and storage requirements for chlorine

health surveillance system

organisational policies and procedures

process of disease

relationship between chlorine, water pH and temperature as it relates to water disinfection

risk management principles

safe water handling practices

time management strategies to set priorities

water quality assurance measures

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 in the Performance Criteria is detailed below.

Point of supply may include

Trailer mounted water containers

Water distribution point

20 L water jerry cans

100 L water bladder

Organisational policies and procedures may include

Clinical standards (state/territory and national)

Codes of ethics

Codes of practice

Environmental health policy

Health and hygiene guidelines

Health surveillance policy documents

Industry professional body standards

Industry standards (state/territory and national)

Organisational health policy directives

Pesticides manual

Relevant Australian Standards

Relevant Commonwealth Acts

Workplace safety guidelines

Field water testing may include

Faecal coliform bacteria

Free chlorine level (after addition)

pH

Physical characteristics (taste, colour, odour and temperature)

Radioactivity (as ordered)

Selected poisons (if presence is suspected, normally arsenic and cyanide, and may include mustard and nerve agents)

Total coliform bacteria

Total dissolved solids (TDS)

Turbidity

Chlorine residual level

is the concentration of chlorine remaining after the chlorine oxidised and performed its disinfection

Chlorine demand

is the amount of chlorine participating in oxidation reactions during a specified contact period; chlorine in water rapidly oxidises organic matter including micro-organisms

Chlorine dosage

is the amount of chlorine added to water; dosage is expressed as a concentration, normally in terms of milligrams per litre (mg/L)

Personal protective equipment may include

Chemical resistant apron

Chemical resistant gloves

Eye protection

Dosing faults may include

Chlorine residual level too high

Chlorine residual level too low

Insufficient contact time allowed

Water pH level too high

Water temperature too high

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
Chlorines are used, handled and stored in accordance with organisational policies and procedures 
Chlorine residue level is established via field water testing 
Chlorine residue level is compared with national drinking water guidelines and information related to chlorine concentration to determine chlorine demand 
Chlorine dosing is conducted in accordance with organisational policies and procedures 
Personal protective equipment is selected, fitted and used correctly 
Dosing is monitored to maintain parameters of dosing to achieve desired chlorine residue level 
Dosing faults are identified and acted on, in accordance with organisational policies and procedures 
Dosing samples are collected and field tested to confirm chlorine residue level and water quality 
Dosing data is collected, recorded and reported according to organisational policies and procedures 
Observations outside defined parameters are reported for further action 

Forms

Assessment Cover Sheet

DEFPH007A - Conduct chlorine dosing of water at the point of supply
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

Feedback to student

 

 

 

 

 

 

 

 

Assessor name:

Signature:

Date:

Assessment Record Sheet

DEFPH007A - Conduct chlorine dosing of water at the point of supply

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

Signature:

Date:

Student signature:

Date: