CPCPDR4013A
Design and size domestic treatment plant disposal systems

This unit of competency specifies the outcomes required to design, size and document the layout of domestic treatment plant disposal systems.It covers preparation for the planning, identification and confirmation of system specifications and requirements, and the planning of the system layout and work finalisation processes, including records and documentation.

Application

Site location for work application will be domestic, and may be a new work site or an existing structure being renovated, extended, restored or maintained.


Prerequisites

Nil


Elements and Performance Criteria

ELEMENT

PERFORMANCE CRITERIA

1. Prepare for planning.

1.1. Nature and scope of planning task are identified and confirmed.

1.2. Safety (OHS) requirements associated with installation of domestic treatment plant disposal systems and workplace environmental requirements are adhered to throughout the work.

1.3. Work is organised and sequenced in conjunction with others involved in or affected by the work.

1.4. Tools and equipment required for planning, sizing and documenting layout of domestic treatment plant disposal systems, including personal protective equipment, are selected and checked for serviceability.

1.5. Work area in which the planning process is to be conducted is prepared.

2. Identify system requirements.

2.1. Information and specifications for required work are obtained and confirmed, if necessary, by site inspection.

2.2. Regulations and Australian standards relevant to work are consulted and applied to all aspects of the work.

2.3. System requirements, including capacity, method of disposal, types of system, treatment system performance requirements and processes are determined from specifications.

2.4. Information on the assessment of land capability for on-site land application of effluent are obtained and confirmed.

2.5. Information for a suitable location for the land application area and reserve area is obtained and confirmed.

2.6. System is sized in accordance with relevant Australian standards, regulatory authorities and workplace requirements.

3. Design system layout.

3.1. Disposal system is planned in accordance with specifications, Environment Protection Authority (EPA) and regulatory authorities' requirements, relevant Australian standards and workplace procedures.

3.2. Plans are developed to accord with relevant Australian standards, regulatory authorities' requirements, maintenance, site topography and landscape application areas.

3.3. Sustainability principles and concepts are applied to work preparation and application.

3.4. Materials required are specified and optimised in accordance with relevant Australian standards from proposed design.

3.5. Plans are recorded in accordance with statutory and regulatory authorities' and workplace requirements.

4. Restore work area.

4.1. Work area is restored in accordance with workplace procedures.

4.2. Tools and equipment used in the process are refurbished and left in accordance with workplace procedures.

4.3. Information is accessed and documentation, including work backup, is completed in accordance with workplace requirements.

Required Skills

Required skills

Required skills for this unit are:

communication skills to:

access information

complete other relevant workplace documentation, including work backups

enable clear and direct communication, using questioning to identify and confirm requirements, share information, listen and understand

follow instructions

identify requirements, including system requirements

organise and sequence tasks with others

record written plans

read and interpret:

documentation from a variety of sources

plans, specifications and drawings

regulations and relevant Australian standards

use language and concepts appropriate to cultural differences

use and interpret non-verbal communication, such as hand signals

identifying and accurately reporting to appropriate personnel any faults in tools, equipment or materials

interpreting plans and specifications to design layout and operational details of a domestic treatment plant disposal system

numeracy skills to apply measurements and calculations

organisational skills, including the ability to plan and set out work

teamwork skills to work with others to action tasks and relate to people from a range of cultural and ethnic backgrounds and with varying physical and mental abilities

technological skills to:

access and understand site-specific instructions in a variety of media

use mobile communication technology.

Required knowledge

Required knowledge for this unit is:

design concepts and performance measures for domestic treatment plant disposal systems

handling of hazardous waste

infectious diseases

job safety analysis (JSA) and safe work method statements (SWMS)

principles of the assessment of land capability for application of effluent

principles, techniques and characteristics of effluent treatment and disposal

process of designing domestic treatment plant disposal systems

properties and characteristics of landscape application areas with suitable plants and vegetation, including:

hardiness

high and low water requirements

maintenance requirements

native to the local area implications

phosphorus tolerance

properties and characteristics of soil, including:

percentages of sand, silt and clay

absorption capacity implications

relevant statutory and authority requirements related to design of domestic treatment plant disposal systems

SI system of measurements

sources of information

Australian standards applicable to the treatment system

use of computers and relevant computer-aided design (CAD) software

workplace and equipment safety requirements.

Evidence Required

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 evidence of:

locating, interpreting and applying relevant information, Australian standards and specifications to the design of domestic treatment plant disposal systems

applying safety requirements throughout the work sequence, including electrical requirements and the use of personal protective clothing and equipment

as a minimum and given the development plans and specification, design, size and document the layout of a treatment system for a domestic dwelling, which is compliant with current and relevant environmental and legislative requirements, ensuring:

application of sustainability principles and concepts

identification, evaluation and incorporation of sustainability principles and concepts into the design

correct identification of plan details

correct selection and use of appropriate processes, tools and equipment

completion of all work to specification

compliance with regulations, relevant Australian standards and organisational quality procedures and processes

communicating and working effectively and safely with others.

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

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.

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.


Range Statement

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 planning task:

absorption may be by absorption trenches or transpiration beds

disposal may be by absorption, spray or recycling

process may be anaerobic or aerobic.

Safety (OHS) is to be in accordance with commonwealth, state and territory legislation and regulations and may include:

handling of materials

hazard control

personal protective clothing and equipment prescribed under legislation, regulations and workplace policies and practices

safe operating procedures, including recognising and preventing hazards associated with:

electricity

hazardous materials and substances

other machines

surrounding structure and facilities

trip hazards

underground services

use of tools and equipment

work site visitors and the public

working at heights

working in confined spaces

working in proximity to others

use of firefighting equipment

use of first aid equipment

workplace environment and safety.

Environmental requirements cover water quality management and may include:

clean-up protection

stormwater protection

waste management.

Tools and equipment may include:

CAD software

drawing instruments

measuring equipment.

Information may include:

charts and hand drawings

diagrams or sketches

instructions issued by authorised organisational or external personnel

job drawings

manufacturer specifications and instructions

material safety data sheets (MSDS)

memos

organisation work specifications and requirements

regulatory and legislative requirements, particularly those pertaining to:

Building Code of Australia

OHS and environmental requirements

plumbing regulations

relevant Australian standards, including:

AS/NZS3500 National plumbing and drainage set: Part 2 Sanitary plumbing and drainage

AS/NZ1547 On-site domestic wastewater management

safe work procedures relating to the design of domestic treatment plant disposal systems

signage

verbal, written and graphical instructions

work bulletins

work schedules, plans and specifications.

Sustainability principles and concepts:

cover the social, economic and environmental use of resources to meet current and future needs

may include:

efficient design principles used throughout to minimal environmental impact

no environmental contamination

efficient use of material incorporated into the design, including recycling of material

efficient energy and water use

correct handling of hazardous materials

disposal of waste material to ensure minimal environmental impact.

Materials may include:

drafting materials

relevant plans and specifications.

Statutory and regulatory authorities include:

commonwealth, state and local authorities administering applicable Acts, regulations and codes of practice.


Sectors

Unit sector

Plumbing and services


Co-Requisites

Nil


Employability Skills

This unit contains employability skills.


Licensing Information

Not Applicable