Elements and Performance Criteria

architects
builders
property owners
statutory bodies.

local government requirements, including:
Integrated Planning Act (IPA)
other regulatory requirements
standard drawings and details
town planning requirements
urban design manuals
treatment requirements, such as:
screens
silt traps
solid removal systems
environmental requirements to cover water quality management, including:
clean-up protection
stormwater protection
waste management
Australian and New Zealand standards, including:
AS/NZS3500 National plumbing and drainage set:
Part 3.1 Stormwater drainage - performance criteria
Part 3.2 Stormwater drainage - acceptable solutions
AS2200 Design charts for water supply and sewerage.

buildings
civil drawings
contour levels
existing services
manufacturer requirements and specifications
reduced levels
site plans
stormwater design
surveys.

access chambers
channels
culverts
downpipes
grated pits
gullies
guttering
inspection chambers
inspection openings
kerbs
manholes
piping
pits.

treatment options:
grass and rock swales
lagoons
momentum diffusers
ponds
screens
silt traps
traps
other solid removal systems as determined
disposal options:
connection to stormwater mains
creeks
kerb and street channels
lakes
manholes
rainwater collection systems, including tanks and dams
rivers
streams.

average rainfall intervals
roof, surface and subsurface calculations
time and concentration.

land surface catchment areas, including a variety of surface conditions such as grassed and paved areas
roof catchment areas.

collection sumps
detention basins
grade of drains
holding pits
manholes.

piping materials:
concrete
earthenware
fibre cement (FRC)
polyvinyl chloride (PVC)
other composite materials
fittings:
bends
grates
gullies
junctions
non-return valves.

building basements
rising main installations
subsurface water drainage systems.

cross-sections
detail drawings
long sections.

commissioning
components
fittings
installation
maintenance
materials
pumps
testing
valves.

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.
It may be assessed on its own or as part of an integrated assessment activity involving production of designs, plans, specifications and supporting documentation for a complex stormwater and roof drainage system.

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 evidence of:


collecting, analysing and evaluating research, including:

survey plans
existing services
building plans
site plans
civil drawings
reduced levels
contour levels
preparing a plan coordinated with other services for the layout of piping, pits, gullies and other system components in accordance with design parameters and site limitations
calculating stormwater detention basins' sizes and capacities
calculating roof catchment areas and surface run-off volumes
determining specifications for guttering requirements and size of downpipes
designing sub-soil drainage systems, including sizing for collection, containment and discharge
creating detail drawings, including long sections and cross-sections

creating a design, including size and detail for complex stormwater and roof drainage systems, including:

grade of drains
holding pits
collection sumps
detention basins
manholes
other system components
applying appropriate software in order to design, size and detail selected stormwater systems
preparing plans for a range of complex stormwater and roof drainage systems
preparing a specification for a complex stormwater and roof drainage system
preparing a testing and commissioning schedule
preparing an operation and maintenance manual.

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 mandatory task requirements
relevant specifications and work instructions
tools and equipment appropriate to applying safe work practices
support materials appropriate to activity
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.