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Elements and Performance Criteria

1. Assess spa water quality.
   • Risks associated with conducting spa water tests are identified.
   • Routine spa water tests are conducted.
   • Spa water test results are monitored.
   • Schedules are developed and monitored for spa watermicrobiological testing in commercial spas.
2. Apply spa water quality principles.
   • Bather loading is estimated and corrective actions are taken to maintain spa water quality.
   • Safe processes for using chemicals to maintain disinfectant levels and chemical balance of spa water are followed.
   • Spa water treatment procedures are implemented.
   • Amount of chemicals required to correct chemical imbalances in spa water is calculated.
3. Document action taken.
   • Spa water test results are recorded.
   • Corrective actions taken are recorded.
   • Information is provided to clients on compliance of spa and environs with safety legislation.

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.
Routine spa water test must include:	concentration of disinfectant in use determining and correcting pH level microbiological monitoring determining and correcting water balance.
Spa water microbiological testing must include at least one of the following:	coliform count cryptosporidium legionella pseudomonas aeruginosa standard plate count staphylococcus.
Spa water treatment procedures must include:	changing spa water determining and correcting pH level sanitising the spa shock dosing determining and correcting water balance using chemical dosing equipment.

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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 assess and use the treatment procedures required to maintain water quality in one domestic spa and one commercial spa.

In doing the above, the person must:

select and use personal protective equipment (PPE)

collect samples of spa water for testing

test spa water quality using appropriate equipment

interpret test results and implement treatment processes for identified spa water quality problems

comply with safety requirements when sampling, testing and treating spa water

report on outcomes of testing and treating spa water.

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Knowledge Evidence

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

Australian Competition and Consumer Commission product safety guidelines

causes and remedies of backwash discharge

chemical dosing benefits and techniques

common spa water problems, reasons and remedies:

bather eye irritation

chlorine odour

cloudy water

discoloured water

green water

metal fixtures corroding

scale

water has dark appearance

commonwealth, state or territory legislation, and local government regulations, and Australian standards impacting on spa water quality relating to:

chemicals

dangerous goods

environmental protection

environmental health

microbiological standards for spas

spas

waste disposal

work health and safety

disinfection practice:

chlorine chemistry

disinfectants:

bromine

chlorine

ozone

ultraviolet light - hydrogen peroxide

dosing frequency

principles

means

health problems associated with spas:

dermatitis

gastro intestinal infection

heat stress

legionnaires’ disease

medications

respiratory infection

skin irritation

hot water chemistry:

chemical overdosing

foaming

hardness

pH and total alkalinity

suspended and dissolved solids

water clarity

water temperature

hot water health benefits

infectious agents that grow in spas

microorganisms found in spa water:

algae

bacteria

protozoa

virus

spa filters:

cleaning

inspection

microbial load

purpose

types

spa water contamination: causes and remedies

spa water testing:

frequency

methods

microbiological monitoring

parameters

procedures

test kit care

treatments for spa water problems:

reasons for treatment techniques

treatment techniques:

determining and correcting pH level

sanitising the spa

shock dosing

determining and correcting total alkalinity

water replacement

water balancing:

balance factors

calcium hardness

pH

principles

saturation index

temperature

total alkalinity

total dissolved salts

water quality:

filtration effectiveness

impact of number of users on spa water quality

microbial load

water chemistry:

chemical composition

chemical imbalance and its consequences

ways of rectifying chemical imbalance.

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