Elements and Performance Criteria

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Scope of work:
must include:
interpreting plans and specifications
sizing and documenting layout of trade waste pre-treatment systems for commercial and industrial applications
may be for new projects or an existing structure being renovated, extended, restored or maintained.

Design requirements must include:
architectural plans
building specifications
cleaning and maintenance procedures
installation requirements
odour control
owner requirements
pipework identification
sizing
trade waste treatment
ventilation.

Statutory and regulatory requirements and relevant Australian standards and codes may include:
AS/NZS3500 National plumbing and drainage
AS2200 Design charts for water supply and sewerage
commonwealth, state or territory and local governments requirements
National Construction Code
other relevant Australian standards and codes.

Trade waste applications may include:
chemical facilities
commercial and industrial facilities that produce a liquid waste stream
commercial and industrial laundry
food preparation facilities
laboratories
motor vehicle workshops
photography development facilities
wash-down facilities.

Cost-benefit analysis:
compares the range of suitable materials and system choices available to enable cost-effective choices to be made without compromising integrity of project
may include:
design styles
energy costs
expected design life
labour costs
material costs
safety factors
speed of installation
suitable materials
authorities’ requirements.

Manufacturer requirements may include:
containment
design and installation
installation space
material specifications
pipe sizing
pump installation
storage systems
technical and trade manuals
ventilation.

Desktop study may include collection and interpretation of existing data for design purposes in:
architectural and building plans
developer plans
manufacturer data
documents, which may include:
applications
brochures
forms
policies
other reports as available
trade waste publications.

Performance requirements must:
establish acceptable discharge standards for the relevant authority
comply with relevant Australian standards, codes and local authorities’ requirements.

Layout of pipework systems:
may include:
location of pipework (fire rating of enclosure)
trade waste plumbing and drainage
pumped systems
accessibility
should not unduly affect building integrity and aesthetic appeal
should have principles of economy, serviceability, durability and fit for use applied.

Fittings may include:
bends
junctions
reflux valves
inspection openings
expansion joints.

Solid removal systems may remove:
bone
dirt
grit
metal
paper
plastic
rubbish
sand
silt
wood
other solid contaminants.

Grease and oil interceptors may include:
coalescing plate separators
dissolved air flotation (DAF)
grease traps
skimmers
vertical separators.

Neutralising chambers may neutralise:
acid
alkaline
chemicals.

Wash-down areas may include:
bin
commercial and industrial wash-down processes that may or may not require stormwater diversion
floor
vehicle
machinery.

Bacterial treatment processes may include:
aerobic
anaerobic
facultative and specialised bacteria for the removal of grease and other contaminants.

Combined and specialised treatment processes may include:
bacterial treatment
cooling pits
diffused air flotation systems
neutralising chambers
solid removal systems
specialised treatment.

System calculations must include:
calculating gradient
interpreting design charts and tables
calculating pipe sizing
calculating reduced level
determining flow and fixture loadings
sizing treatment system
storage tank capacity.

Pumpwell, pumps, controls and equipment requirements may include:
access covers
automatic controls
capacity
chains
corrosion-resistant materials
detailing
emergency storage
high and low-level water controls and alarms
impeller sizing
inlet and outlet design requirements
installation and mounting requirements
ladder access
odour control
macerator requirements
pump selection
pump sizing
pumpwell sizing
space requirements
step irons
valve requirements
ventilation
warning system.

Pipe supports include:
anchors
bedding
bracket spacing
concrete support
corrosion protection
cover
hanging brackets
manufacturer-recommended specific fixings
material requirements
saddles
provision for expansion
wall and ceiling brackets.

Materials may include:
pipes may include:
cast iron or epoxy lined
earthenware or vitrified clay pipe (VCP)
polyethylene (PE)
polypropylene (PP)
other approved material
fittings and fixtures, including sound attenuation requirements.

Jointing methods may include:
electrofusion welding
mechanical joints
rubber ring
threading.

Installation requirements may include:
bedding
pipe protection, which may include:
cover
corrosion
impact
fire rating
level of workmanship
manufacturer-recommended specific fixings
pipe support
provision for expansion
serviceability and access.

Computer software packages include:
proprietary design software
manufacturer software.

Sustainability principles and concepts:
cover the current and future social, economic and environmental use of resources
may include:
selecting appropriate material to ensure minimal environmental impact
efficient use of material
efficient energy usage/capital outlay comparison
effect on the environment due to overflow or leakage
material selected to convey the type of discharge
water efficiency.

Plans:
may include:
axonometrics
cross-sections
details
elevations
isometrics
schematics
sections
may be produced using:
computer generation
drawing equipment.

Specification may include:
access chambers (manholes)
bedding
commissioning
concrete support and detailing specialised components
jointing
manufacturer requirements
materials
pumps
safety (WHS)
support
testing
workmanship.

Testing may include:
air pressure
compliance with authorities’ discharge requirements
drainage inspection
hydrostatic
performance
quality assurance (QA) audit.

Commissioning schedule may include:
checking for foreign material
checking system defects
checking that system functions as per design
containment
leak check
operational commissioning
pump commissioning
system certification
treatment system commissioning.

Operation and maintenance manual may include:
as installed drawings
certification documentation
results of commissioning test
maintenance schedules
manufacturer brochures and technical information
odour control
regular treatment system maintenance
regular water quality testing
ventilation
water auditing.

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.
Overview of assessment
This unit of competency could be assessed in the workplace or a close simulation of the workplace environment providing that simulated or project-based assessment techniques fully replicate plumbing and services workplace conditions, materials, activities, responsibilities and procedures.
Critical aspects for assessment and evidence required to demonstrate competency in this unit
A person who demonstrates competency in this unit must be able to provide, as a minimum, evidence of the ability to:
design, size and document the installation and layout details for a trade waste pre-treatment system, including a specification for two of the following:
commercial kitchen
vehicle mechanical workshop
commercial laundry
metal plating process
evaluate and document design parameters to relevant Australian standards, codes, client information, local authorities’ trade waste policy, and manufacturer installation requirements
evaluate health risks associated with the trade waste system
plan and detail system components, including pre-treatment systems and piping systems
design and size trade waste systems
design and size wash-down and stormwater exclusion systems
prepare plans and specifications for the trade waste pre-treatment installations to industry standards
prepare schedules for testing and commissioning
produce operation and maintenance manuals
apply sustainability principles and concepts throughout installations
communicate with others to ensure safe and effective workplace operations.

Context of and specific resources for assessment
This competency is to be assessed using standard and authorised work practices, safety requirements and environmental constraints.
Assessment of essential underpinning knowledge will usually be conducted in an off-site context.
Assessment is to comply with relevant regulatory or Australian standards’ requirements.
Resource implications for assessment include:
an induction procedure and requirement
realistic tasks or simulated tasks covering the minimum task requirements
relevant specifications and work instructions, including design brief drawings, specifications, codes, design concepts and construction schedules
tools and equipment appropriate to applying safe work practices, including computers, software and calculators
workplace instructions relating to safe working practices and addressing hazards and emergencies
material safety data sheets
research resources, including industry-related systems information.
Reasonable adjustments for people with disabilities must be made to assessment processes where required. This could include access to modified equipment and other physical resources, and the provision of appropriate assessment support.

Method of assessment
Assessment methods must:
satisfy the endorsed Assessment Guidelines of the Construction, Plumbing and Services Training Package
include direct observation of tasks in real or simulated work conditions, with questioning to confirm the ability to consistently identify and correctly interpret the essential underpinning knowledge required for practical application
reinforce the integration of employability skills with workplace tasks and job roles
confirm that competency is verified and able to be transferred to other circumstances and environments.
Validity and sufficiency of evidence requires that:
competency will need to be demonstrated over a period of time reflecting the scope of the role and the practical requirements of the workplace
where the assessment is part of a structured learning experience the evidence collected must relate to a number of performances assessed at different points in time and separated by further learning and practice, with a decision on competency only taken at the point when the assessor has complete confidence in the person's demonstrated ability and applied knowledge
all assessment that is part of a structured learning experience must include a combination of direct, indirect and supplementary evidence.
Assessment processes and techniques should as far as is practical take into account the language, literacy and numeracy capacity of the candidate in relation to the competency being assessed.
Supplementary evidence of competency may be obtained from relevant authenticated documentation from third parties, such as existing supervisors, team leaders or specialist training staff.