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SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD THAT HAS PASSED THE END DATE: 

Measure and interpret chlorine dosage 
SAQA US ID UNIT STANDARD TITLE
254097  Measure and interpret chlorine dosage 
ORIGINATOR
SGB Water Sector 
PRIMARY OR DELEGATED QUALITY ASSURANCE FUNCTIONARY
-  
FIELD SUBFIELD
Field 12 - Physical Planning and Construction Civil Engineering Construction 
ABET BAND UNIT STANDARD TYPE PRE-2009 NQF LEVEL NQF LEVEL CREDITS
Undefined  Regular  Level 3  NQF Level 03  6 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2026-06-30   2029-06-30  

In all of the tables in this document, both the pre-2009 NQF Level and the NQF Level is shown. In the text (purpose statements, qualification rules, etc), any references to NQF Levels are to the pre-2009 levels unless specifically stated otherwise.  

This unit standard does not replace any other unit standard and is not replaced by any other unit standard. 

PURPOSE OF THE UNIT STANDARD 
The qualifying learner achieving this unit standard will be able to interpret and make adjustments to maintain the correct chemical dosage system for quality water.

Learners credited with this unit standard are capable of:
  • Explaining the process of chlorination to disinfect water.
  • Operating on-site chlorine process.
  • Connecting and disconnecting chlorine cylinders.
  • Calculating the average chlorine dosages. 
    		•

    LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
    It is assumed that learners are already competent in the following:
  • Communication literacy at NQF Level 2.
  • Mathematical literacy at NQF Level 2.

    It is also assumed that learners are competent in the following unit standard:
  • "Apply personal safety practices NQF Level 2". 
    		•

    UNIT STANDARD RANGE 
    N/A 

    Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Explain the process of chlorination to disinfect water. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The purpose of chlorination is explained within the context of maintaining quality water. 

    ASSESSMENT CRITERION 2 
    The chlorination process is optimised and managed in terms of the source compound of chlorine, its production and properties, storage and handling. 

    ASSESSMENT CRITERION 3 
    The impact of pH on chlorination is optimised and managed in terms of disinfection efficiency and hypochlorous acid levels. 

    ASSESSMENT CRITERION 4 
    The effectiveness of chlorine compounds as disinfectants is optimised and managed in terms of pathogen kill rates, chlorine levels, and time. 

    SPECIFIC OUTCOME 2 
    Explain the factors affecting chlorine effectiveness. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Operating parameters are controlled in order to meet dosage specifications in accordance with works policies and procedures. 

    ASSESSMENT CRITERION 2 
    Chemical interferences are identified and explained in order to make adjustments to effective chlorination. 
    ASSESSMENT CRITERION RANGE 
    Chemical interferences refer to but are not limited to pH, ammonia, nitrates and organics.
     

    ASSESSMENT CRITERION 3 
    Components of chlorinators are identified and explained in terms of their uses. 
    ASSESSMENT CRITERION RANGE 
    Components refer to but are not limited to rotometer, venturi, and pressure relief valve and pressure gates.
     

    SPECIFIC OUTCOME 3 
    Operate on-site chlorine process. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Knowledge of electrolyses is demonstrated in terms of the formation of chlorine compounds. 

    ASSESSMENT CRITERION 2 
    Forms of chlorine are identified and described in terms of their uses. 
    ASSESSMENT CRITERION RANGE 
    Forms of chlorine include but are not limited to gaseous chlorine, on-site chlorine dioxide generators; solid calcium hypochlrorite tablets and liquid sodium hypochlorite (bleach).
     

    ASSESSMENT CRITERION 3 
    The performance of disinfection is evaluated based on the removal efficiency of microbial organisms. 

    ASSESSMENT CRITERION 4 
    Critical performance parameters are explained in terms of chlorine dosage and chlorine residual. 

    SPECIFIC OUTCOME 4 
    Connect and disconnect chlorine cylinders. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    Safety measures are applied when connecting and disconnecting chlorine cylinders in accordance with organizational work policies and procedures. 

    ASSESSMENT CRITERION 2 
    Fittings are identified and explained for connection and disconnection of cylinders. 

    ASSESSMENT CRITERION 3 
    Tools required to change cylinders are identified and described in terms of their uses. 

    ASSESSMENT CRITERION 4 
    Steps to disconnect and connect are explained and applies in accordance with work policies and procedures. 

    SPECIFIC OUTCOME 5 
    Calculate the average chlorine dosages. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The purpose of calculating chlorine dosage rates is explained with examples. 

    ASSESSMENT CRITERION 2 
    Daily dosage rates are calculated using the rotometer readings. 

    ASSESSMENT CRITERION 3 
    Chlorine demand is determined to maintain the required dosage amount. 

    SPECIFIC OUTCOME 6 
    Record chlorine dosage. 

    ASSESSMENT CRITERIA     

    ASSESSMENT CRITERION 1 
    The importance of recording chlorine dosage is explained with examples. 

    ASSESSMENT CRITERION 2 
    Adjustments made on the chlorinator are recorded using residual measurements. 

    ASSESSMENT CRITERION 3 
    Changes made on the drum cylinders are recorded for future use. 


    UNIT STANDARD ACCREDITATION AND MODERATION OPTIONS 
  • Anyone assessing a learner or moderating the assessment of a learner against this unit standard must be registered as an assessor with the relevant ETQA.
  • Any institution offering learning that will enable the achievement of this unit standard must be accredited as a provider with the relevant ETQA.
  • Assessment and moderation of assessment will be overseen by the relevant ETQA according to the ETQA`s policies and guidelines for assessment and moderation.
  • Moderation must include both internal and external moderation of assessments at exit points of the qualification, unless ETQA policies specify otherwise. Moderation should also encompass achievement of the competence described both in individual unit standards as well as the integrated competence described in the qualification. 
    		•

    UNIT STANDARD ESSENTIAL EMBEDDED KNOWLEDGE 
    Learners should have a knowledge and understanding of:
  • Chlorine.
  • Occupational Health and Safety legislation.
  • Chemicals.
  • Disinfection. 
    		•

    UNIT STANDARD DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems in which responses display that responsible decisions using critical and creative thinking have been made by monitoring the flow rate and report findings for corrective action. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as a member of a team members for smooth shit hand over. 

    UNIT STANDARD CCFO ORGANISING 
    Plan, organise and manage oneself and one`s activities responsibly and effectively by identifying and obtaining relevant personal protective clothing and follow safety procedures in carrying out work. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information relating to water quality. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively using visual, mathematical and/or language skills in the form of oral and/or written presentation to the plant supervisor relating to problems identified in the plant. 

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically, showing responsibility towards the environment and health of others by applying safety and preventative measures when carrying out work. 

    UNIT STANDARD CCFO DEMONSTRATING 
    Demonstrate an understanding of the world as a set of related systems by recognising that problem-solving contexts do not exist in isolation relating to working with filters. 

    UNIT STANDARD ASSESSOR CRITERIA 
    N/A 

    REREGISTRATION HISTORY 
    As per the SAQA Board decision/s at that time, this unit standard was Reregistered in 2012; 2015. 

    UNIT STANDARD NOTES 
    Integrated Assessment:

    When conducting assessments, assessors must ensure that they are familiar with the full text of the unit standards being assessed. Assessors must ensure that the assessment covers the specific outcomes, critical cross-field outcomes and essential embedded knowledge by developing assessment activities and tools, which are appropriate to the contexts in which the learners are working. These activities and tools may include self-assessment, peer assessment, formative and summative assessment. It may be more effective and efficient to assess a number of unit standards together in an integrated way, thus reducing the overall number of assessments and ensuring that commonalities that exist between a number of unit standards are captured in a way that makes sense for assessment.

    Assessment Option:

    Learners could be assessed using the following methods:
  • Observation.
  • Verbal and written questions. 
    		•

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  60190   National Certificate: Water and Wastewater Process Control  Level 3  NQF Level 03  Passed the End Date -
    Status was "Reregistered"     		 2023-06-30  EWSETA 


    PROVIDERS CURRENTLY ACCREDITED TO OFFER THIS UNIT STANDARD: 
    This information shows the current accreditations (i.e. those not past their accreditation end dates), and is the most complete record available to SAQA as of today. Some Primary or Delegated Quality Assurance Functionaries have a lag in their recording systems for provider accreditation, in turn leading to a lag in notifying SAQA of all the providers that they have accredited to offer qualifications and unit standards, as well as any extensions to accreditation end dates. The relevant Primary or Delegated Quality Assurance Functionary should be notified if a record appears to be missing from here.
     
    1. CHILUTSI TRADING ENTERPRISE 
    2. DR HE MAEPA INSTITUTE 
    3. ERGO MAPHELONG INSTITUTE (PTY) LTD 
    4. ERWAT 
    5. HAZYVIEW WATER SKILLS ACADEMY 
    6. K-BONENG CONSULTING SERVICES (PTY) LTD 
    7. Kelvin Power (Pty) Ltd 
    8. NTANDOKAZI HOLDINGS (PTY) LTD 
    9. SEANEGO INTERGRATED NATURAL RESOURCES MANAGEMENT 


    All qualifications and part qualifications registered on the National Qualifications Framework are public property. Thus the only payment that can be made for them is for service and reproduction. It is illegal to sell this material for profit. If the material is reproduced or quoted, the South African Qualifications Authority (SAQA) should be acknowledged as the source.