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

Demonstrate dosing of chlorine products in a wastewater works 
SAQA US ID UNIT STANDARD TITLE
12040  Demonstrate dosing of chlorine products in a wastewater works 
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 2  NQF Level 02  5 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Passed the End Date -
Status was "Reregistered" 		 2005-02-09  2008-02-09  SAQA 1058/05 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2009-02-09   2012-02-09  

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 in combination with context expertise standard(s) will be able to dose the correct amount of chlorine in accordance with safety, works and legislative procedures. Correct dosing contributes to the effective operation and economical viability of wastewater and water purification works. Correct dosage of chlorine will ensure the protection of human health and the ecosystem in both rural and urban areas. 

LEARNING ASSUMED TO BE IN PLACE AND RECOGNITION OF PRIOR LEARNING 
Knowledge of the water cycle;
Water and waste water systems NQF level 2;
Literacy NQF level 1;
Numeracy NQF level 1;
Apply personal safety practices NQF level 2. 

UNIT STANDARD RANGE 
Work policies and procedures:
Best operating procedures.

Legislation:
OHS Act

Chlorine products:
Chlorine gas, sodium hypochlorite/Jik, hypochlorite (HTH).

Safety equipment:
Gas masks, lifelines, extraction fan, chlorine alarm, safety shower, fire extinguisher, breathing apparatus, ammonia bottle, emergency kit A & B, special valve spanner.

Reports:
Chlorine readings, chlorine stocks, flow readings, effluent readings or incidents. 

Specific Outcomes and Assessment Criteria: 

SPECIFIC OUTCOME 1 
Explain the different chlorine products 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
1. The use of chlorine gas is described. 

ASSESSMENT CRITERION 2 
2. The use of sodium hypochlorite/Jik is described. 

ASSESSMENT CRITERION 3 
3. The use of calcium hypochlorite (HTH) is described. 

ASSESSMENT CRITERION 4 
4. The advantages and disadvantages of the three types of chlorine are explained. 

SPECIFIC OUTCOME 2 
Comply with safety legislation when handling and storing chlorine 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
1. All types of safety equipment are identified. 

ASSESSMENT CRITERION 2 
2. Safety equipment in works is checked and used correctly. 

ASSESSMENT CRITERION 3 
3. Damaged safety equipment is reported. 

ASSESSMENT CRITERION 4 
4. Safety procedures when entering a chlorine room are explained. 

ASSESSMENT CRITERION 5 
5. Safety procedures when handling chlorine are demonstrated. 

ASSESSMENT CRITERION 6 
6. Hazard signs and colour codes are identified and explained. 

ASSESSMENT CRITERION 7 
7. Storage of chlorine products is described and safe storage is explained. 

ASSESSMENT CRITERION 8 
8. Records of chlorine in store are accurate and up to date. 

SPECIFIC OUTCOME 3 
Operate chlorine dosing equipment in accordance with work policies and procedures 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
1. Chlorine is dosed in accordance with instructions for application. 

ASSESSMENT CRITERION 2 
2. Dosing equipment is used in accordance with work procedures. 

SPECIFIC OUTCOME 4 
Measure the effectiveness of chlorine dosing in accordance with work policies and procedures 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
1. Chlorine dosing rates are recorded. 

ASSESSMENT CRITERION 2 
2. Residual chlorine is measured, recorded and reported. 

ASSESSMENT CRITERION 3 
3. Chlorine dose is adjusted according to instructions. 

SPECIFIC OUTCOME 5 
Maintain chlorine dosing equipment 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
1. Chlorine levels are checked, recorded and reported. 

ASSESSMENT CRITERION 2 
2. Chlorine dosing equipment is checked to ensure proper functioning, including leaks. 

ASSESSMENT CRITERION 3 
3. Damaged dosing equipment is recorded and reported. 

SPECIFIC OUTCOME 6 
Complete designated tasks and reports in accordance with work policies and procedures 

ASSESSMENT CRITERIA 

ASSESSMENT CRITERION 1 
1. Designated tasks and reports are complete and accurate. 

ASSESSMENT CRITERION 2 
2. Relevant information is communicated. 


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:
  • Relevant Legislation: OHS Act
  • The importance of using safety equipment and following safety procedures when handling chlorine
  • The dangers of chlorine including handling, storage and dosing
  • Chlorine off loading and handling procedures for tanks, drums, cylinders, tankers
  • Purpose of chlorine addition processes
  • The purpose of chlorine dosing. (Disinfection, algal & filamentous growth, oxidation of iron & manganese)
  • Procedures to follow in the event of major and minor chlorine leaks
  • Procedure to detect a chlorine leak
  • Gas dosing equipment including the chlorinator
  • Alternative disinfection processes
  • Importance of keeping the chlorine dosing room free from water
  • Importance of good housekeeping in the chlorine dosing room
  • Importance of Continual Chlorine Dosage i.e. Uninterrupted Dosing
  • Monitor the Performance of the Disinfection Process
  • Safe practices when exchanging chlorine gas cylinders 
    		•


    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.

    Assessment criteria:
  • Chlorine dosing equipment is checked to ensure proper functioning, including leaks. 
    		•

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as a member of a team, group, organisation, and community.

    Assessment criteria:
  • None. 
    		•

    UNIT STANDARD CCFO ORGANISING 
    Plan, organise and manage oneself and one`s activities responsibly and effectively.

    Assessment criteria:
  • Chlorine is dosed in accordance with instructions for application. 
    		•

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information.

    Assessment criteria:
  • Chlorine dosing equipment is checked to ensure proper functioning, including leaks. 
    		•

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively using visual, mathematical and/or language skills in the form of oral and/or written presentation.

    Assessment criteria:
  • All. 
    		•

    UNIT STANDARD CCFO SCIENCE 
    Use science and technology effectively and critically, showing responsibility towards the environment and health of others.

    Assessment criteria:
  • Dosing equipment is used in accordance with work procedures.
  • Chlorine dose is adjusted according to instructions.
  • Chlorine dosing equipment is checked to ensure proper functioning, including leaks. 
    		•

    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.

    Assessment criteria:
  • Chlorine dosing equipment is checked to ensure proper functioning, including leaks. 
    		•

    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:
    Oral or written questions
    Simulation
    Observation 

    QUALIFICATIONS UTILISING THIS UNIT STANDARD: 
      ID QUALIFICATION TITLE PRE-2009 NQF LEVEL NQF LEVEL STATUS END DATE PRIMARY OR DELEGATED QA FUNCTIONARY
    Core  22673   National Certificate: Wastewater Process Operations  Level 2  NQF Level 02  Passed the End Date -
    Status was "Reregistered"     		 2007-11-28  Was EWSETA until Last Date for Achievement 


    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.
     
    NONE 


    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.