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Elements and Performance Criteria

  1. Prevent water problems.
  2. Assess water quality.
  3. Treat water problems.
  4. Complete and document water treatment activities.

Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Preventative measuresmust include:

bather education and compliance with hygiene and usage rules

operator training

water quality monitoring, inspection of premises, and daily record keeping

water treatment.

Water quality parameters must include:

commercial swimming pools and spas

domestic swimming pools and spas

public swimming pools and spas.

Tests must include:

colorimetric

electronic

titrimetric

turbidimetric.

Water problemsmust include at least five of the following groups:

algae

bather discomfort:

eye irritation

skin irritation

cloudy water

discoloured water:

green or blue-green water

red-brown water

disinfectant by-products

faecal accident/incident

foaming

metal fixture corroding

microorganisms:

bacterial pathogens

protozoan pathogens

viral pathogens

yeast and fungal pathogens

sanitisation problems

scale

scum line

stains

water balance problems:

calcium hardness

pH

total alkalinity.


Performance Evidence

A person demonstrating competency in this unit must satisfy the requirements of the elements, performance criteria, foundation skills and range of conditions of this unit.

The person must also demonstrate safe procedures when identifying and treating five different water problems in four different swimming pools and one spa.

In doing the above, the person must:

sample and test or arrange for laboratory testing of water samples from the above swimming pools and spa

identify and implement treatment processes for identified water problems

comply with safety requirements when sampling, testing and treating water in swimming pools and spas

report on outcomes of testing and treating swimming pool and spa water.


Knowledge Evidence

A person demonstrating competency in this unit must demonstrate knowledge of:

chemical dosing: chemicals, procedures and benefits

common swimming pool and spa water problems:

algae

bather discomfort

biofilm

cloudy water

combined chlorine

disinfectant by-products

discoloured water

faecal accident/incident

foaming

metal fixture corroding

nitrates

phosphates

recreational water illnesses

sanitisation problems

scale

scum line

stains

water balance problems

commonwealth, state or territory legislation, and local government regulations, and Australian standards impacting on identifying and treating water problems in swimming pools and spas relating to:

chemicals

dangerous goods

environmental protection

environmental health

work health and safety

waste disposal

contamination response:

environmental

faecal

non-faecal

other

disinfection:

chlorine chemistry

disinfectants

principles

health effects of contaminated water in swimming pools and spas:

faecal-related illnesses

faecal incident response

recreational water illnesses

pool water contamination:

bacteria

protozoa

virus

preventative measures for minimising water problems in swimming pools and spas

testing:

for:

calcium hardness

chlorine demand

cyanuric acid

disinfection

hydrogen peroxide

metals

nitrates

non-halogen oxidisers

oxidation

oxidation reduction potential

pH

polyhexanide (PHMB)

phosphates

salt

temperature

total alkalinity

total dissolved solids

water balance

frequency

methods:

colorimetric

electronic

titrimetric

turbidimetric

procedures

sampling

test kit care and contents

treatments for swimming pool and spa water problems:

algaecides

breakpoint chlorination

chemical disinfection

chlorination

corrosion prevention

discoloured water

filtration

oxidation

ozone

shock dosing

spa water treatment:

reasons for treatment techniques

treatment techniques: change spa water, determine and correct pH level, sanitise the spa, and determine and correct total alkalinity

superchlorination

ultraviolet (UV) systems

water replacement

water balancing:

adjusted alkalinity

balance factors

calcium hardness

pH

principles

saturation index

temperature

testing

total alkalinity

total dissolved salts

water quality parameters.