SAQA 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.
SOUTH AFRICAN QUALIFICATIONS AUTHORITY 
REGISTERED UNIT STANDARD: 

Demonstrate knowledge of SI measurement units used in water and wastewater treatment 
SAQA US ID UNIT STANDARD TITLE
254123  Demonstrate knowledge of SI measurement units used in water and wastewater treatment 
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 
REGISTRATION STATUS REGISTRATION START DATE REGISTRATION END DATE SAQA DECISION NUMBER
Reregistered  2018-07-01  2023-06-30  SAQA 06120/18 
LAST DATE FOR ENROLMENT LAST DATE FOR ACHIEVEMENT
2024-06-30   2027-06-30  

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 
This unit standard is intended for people who are expected to measure volumes and flow rates on a water and wastewater treatment plant. People credited with this unit standard are able to measure physical quantities using SI units. Learners will be provided with knowledge of different measuring equipment and methods applicable in the water industry.

Learners credited with this unit standard will be able to:
  • Identify and describe the units used in the standard international (SI) metric system.
  • Perform calculations using the SI system of measurement.
  • Use formulae to solve for unknown variables.
  • Take measurements and use them in calculations to solve problems.
  • Describe dilute solution strengths.
  • Solve problems involving calculation of time. 

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

  • UNIT STANDARD RANGE 
    Physical quantities to be measured refer to but are not limited to:
  • Time.
  • Temperature.
  • Mass.
  • Distance.

    Measuring equipment includes but are not limited to:
  • Rulers.
  • Tape measures.
  • Calipers.
  • Measuring cylinders.
  • Thermometer.
  • Balances (scales).
  • Stopwatch. 

  • Specific Outcomes and Assessment Criteria: 

    SPECIFIC OUTCOME 1 
    Describe the units used in the standard international (SI) metric system. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The units used in the SI metric system are described in terms of their applications. 
    ASSESSMENT CRITERION RANGE 
    Length, area, time, volume, mass, velocity, flow rate, pressure.
     

    ASSESSMENT CRITERION 2 
    Units are converted using more convenient prefixes. 
    ASSESSMENT CRITERION RANGE 
    More convenient prefixes refer to but are not limited to mega, kilo, milli and micro.
     

    SPECIFIC OUTCOME 2 
    Use formulae to solve for unknown variables. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Common formulae used in the water and wastewater industry are identified and described to calculate different parameters. 
    ASSESSMENT CRITERION RANGE 
    Common formulae refer to but are not limited to formula for the calculation of area and volume of common shapes, density, flow rate and concentration. Parameters refer to but are not limited to diameters, radius, conical and pyramidal.
     

    ASSESSMENT CRITERION 2 
    A simple formula is transposed in order to solve an unknown variable. 

    SPECIFIC OUTCOME 3 
    Perform calculations in the SI system of measurement. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    The cross-sectional area of a pipe is calculated from the diameter using the SI System. 

    ASSESSMENT CRITERION 2 
    The volume of a tank is calculated using the SI System. 

    ASSESSMENT CRITERION 3 
    Densities of substances are calculated using the SI System. 

    ASSESSMENT CRITERION 4 
    Concentrations are calculated using the SI System. 

    ASSESSMENT CRITERION 5 
    Flow rates are calculated using known volumes and stopwatch. 

    ASSESSMENT CRITERION 6 
    Meters are calibrated using known volume and a stopwatch. 

    ASSESSMENT CRITERION 7 
    Retention or storage time is calculated given a flow rate and fixed volume vessel. 

    SPECIFIC OUTCOME 4 
    Take measurements and use them in calculations to solve problems. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Measurements are made to accuracy appropriate to the problem. 

    ASSESSMENT CRITERION 2 
    Solution is consistent with the problem. 

    SPECIFIC OUTCOME 5 
    Describe dilute solution strengths. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Solutions are described in terms of the solutions encountered, concentration calculations, and the units used to describe them. 
    ASSESSMENT CRITERION RANGE 
    Solutions include but are not limited to - sea water, chlorine, fluoride, faecal coliform counts; units - g/m3, mg/m3, mg/l, %, ppm, kg/l.
     

    SPECIFIC OUTCOME 6 
    Solve problems involving calculation of time. 

    ASSESSMENT CRITERIA
     

    ASSESSMENT CRITERION 1 
    Problems relating to the calculation of time are identified and explained in order to apply corrective action. 
    ASSESSMENT CRITERION RANGE 
    Problems refer to settling time, mixing time, aeration time and retention time.
     

    ASSESSMENT CRITERION 2 
    Time to fill a vessel of known size is calculated for given flow rate and vice versa. 


    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 DEVELOPMENTAL OUTCOME 
    N/A 

    UNIT STANDARD LINKAGES 
    N/A 


    Critical Cross-field Outcomes (CCFO): 

    UNIT STANDARD CCFO IDENTIFYING 
    Identify and solve problems relating to sub optimal operation of the plant in which responses display that responsible decisions using critical and creative thinking have been made by using the membrane process to remove particulate matter. 

    UNIT STANDARD CCFO WORKING 
    Work effectively with others as a member of a small team to ensure optimization of the water and wastewater treatment process. 

    UNIT STANDARD CCFO ORGANISING 
    Plan, organise and manage oneself and one's activities responsibly and effectively by following work orders. 

    UNIT STANDARD CCFO COLLECTING 
    Collect, analyse, organise and critically evaluate information relating problems and conditions of the membrane plant. 

    UNIT STANDARD CCFO COMMUNICATING 
    Communicate effectively using visual, mathematical and/or language skills in the form of oral and/or written presentation to inform key stakeholders of the operations to take place. 

    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 recognising that membrane process is one of the effective processes for water and wastewater treatment. 

    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:
  • Oral or written questions.
  • Observation.
  • Product sample reports.

    Supplementary Notes:

    Definitions:
  • Retention or storage time refers to the time to fill or empty a container of a fixed volume at a constant flow rate.
  • Retention time is also used to calculate the distance in a pipe or the time in a tank needed for proper chemical reaction. 

  • 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  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.
     
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    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.