This unit applies to professionals and para-professionals to design a gravity sewerage system as an element of town sewerage.
No licensing, legislative, regulatory or certification requirements apply to this unit at the time of publication.
Not applicable.
1 Clarify and confirm design requirements | 1.1 Review concept proposal to identify system requirements. 1.2 Identify constraints and parts of the concept proposal requiring clarification or with design problems. 1.3 Identify stakeholders and evaluate and negotiate alternative options to resolve problems. 1.4 Confirm design standards and specifications relevant to the wastewater collection system. 1.5 Define and document detailed design requirements. 1.6 Identify and apply initial data to the design. |
2 Prepare collection system design | 2.1 Review project design requirements prior to proceeding with detailed design. 2.2 Determine upstream catchment control 2.3 Prepare designs forgravity sewer collection systems to meet project design requirements and design standards, codes and specifications. 2.4 Design to allow for land use, i.e. residential, industrial. 2.5 Determine pipe sizes, grades and requirements for self cleaning for varied weather flows. 2.6 Finalise horizontal and vertical pipeline alignment in accordance with project design requirements and design standards and specifications. 2.7 Determine appropriate pipe materials. 2.8 Prepare structural design of pipelines. 2.9 Determine the number, types, configurations and locations of maintenance structures. 2.10 Design property connections to meet project design requirements and design standards and specifications. 2.11 Design to make allowance for OHS during construction and in service life. 2.12 Prepare design drawings in accordance with design standards, codes and Water Agency requirements. |
3 Manage documentation | 3.1 Prepare supporting documentation in accordance with legislative and organisation requirements. 3.2 Maintain engineering and project records in accordance with legislative and organisation requirements. |
4 Evaluate design | 4.1 Review design to ensure objectives and specifications have been met. 4.2 Identify and evaluate compliance with environmental standards and impacts of the design. 4.3 Identify and evaluate compliance with legislation, codes and standards including OHS. 4.4 Conduct consultations with parties with an interest in the design and report on adjustments and proposed design changes. 4.5 Investigate and assess alternative design options. 4.6 Recommend the most appropriate design proposal for adoption. |
Required skills: interpret and apply legislative requirements, including OHS interpret and apply standards, codes and specifications assess environmental impacts apply quality requirements analyse complex information operate computer software conduct investigations prepare documentation collaborate with a diverse team of specialists conduct consultations with a range of community interests project planning |
Required knowledge: legislative requirements for the design of wastewater collection systems including environmental protection and OHS standards, codes and specifications for the design of gravity sewerage systems output quality specification requirements cost benefit analysis procedures risk analysis procedures investigation procedures and methodologies documentation and information management requirements |
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 | The candidate should: perform each task outlined in the elements consistently and in a representative range of contexts meet the performance criteria associated with each element by employing the techniques, procedures, information and resources available in the workplace from those listed in the range statement demonstrate an understanding of the underpinning knowledge and the application of skills as described in the required skills and knowledge section. |
Critical aspects for assessment and evidence required to demonstrate competency in this unit | The candidate should demonstrate the ability to design wastewater collection systems including: identifying, analysing and defining wastewater collections systems and conditions and constraints identifying and interpreting legislative, environmental, business and project management requirements identifying and interpreting standards, codes and specifications analysing a range of factors to determine hydraulic and system design components evaluating and clarifying system plans and options for system design managing and securing documentation to support and report project management evaluating design process and outcomes managing, recording, reporting and information management |
Context of and specific resources for assessment | Access to the workplace and resources including: documentation that should normally be available in a water industry organisation workplace specific equipment and technology supervision and experienced team members to provide observations, feedback and third party reports enterprise operating procedures and work allocation relevant codes, standards and government regulations. Where applicable, physical resources should include equipment modified for people with disabilities. Access must be provided to appropriate learning and assessment support when required. |
Method of assessment | The following methods are suggested: assessment in the workplace or in a simulated workplace and under the normal range of workplace conditions assessment should also be conducted in conjunction with aspects of technical competencies that are consistent with the work environment techniques for gathering evidence of competency may include: observation of performance written and/or oral questioning to assess knowledge and understanding completion of workplace documents and reports produced as part of routine work activities third-party reports from experienced practitioners completion of performance feedback from supervisors and colleagues |
Guidance information for assessment | Assessment processes and techniques must be culturally appropriate, and appropriate to the language and literacy capacity of the candidate and the work being performed. Validity and sufficiency of evidence require 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 a decision of competence only taken at the point when the assessor has complete confidence in the person’s competence over time and in various contexts all assessment that is part of a structured learning experience must include a combination of direct, indirect and supplementary evidence where assessment is for the purpose of recognition (RCC/RPL), the evidence provided will need to be authenticated and show that it represents competency demonstrated over a period of time assessment can be through simulated project In all cases where practical assessment is used it will be combined with targeted questioning to assess the underpinning knowledge. Questioning will be undertaken in a manner appropriate to the skill levels of the operator and cultural issues that may affect responses to the questions, and will reflect the requirements of the competency and the work being performed. |
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. | |
Initial data may include: | costs existing and future flows hydraulic planning input and output quality customer requirements locations catchments demographics land use easements topographic information. |
Project design requirements may include: | gravity sewer sizes, grades and locations land use, i.e. residential, industrial pipe material staging of developments preliminary reticulation main layouts future development system configuration catchment boundaries hydraulic requirements, including self cleansing and scouring velocities pumping stations detention tanks emergency relief structures odour control operational requirements, including access future system expansion options temporary disposal, e.g. temporary pumping stations environment OHS construction methods |
Designs forgravity sewer collection systems may include: | community cost interfaces with pumping stations, detention tanks, emergency relief structures, siphons, etc land use including residential, industrial environmental considerations clearances from other services (gas, telecommunications, electricity) location of pipeline and access risks / consequences of failure corrosion protection operational access easements topography |
Maintenance structures may include: | maintenance holes maintenance shafts inspection shafts other maintenance structures as approved by the water agency |
Property connectionsdesign may include: | location of boundary traps and water sealed maintenance holes limitations of connections methods of connections depth of connections locations of connections types of connections type of development including residential, industrial pipe material access |
Supporting documentation may include: | records of: construction installation commissioning production operation maintenance training OHS customer contact environment, culture, heritage design proposals design changes quality assurance estimates of cost approval |
Legislative and organisation requirements may include: | federal and state legislation national guidelines codes and standards OHS environmental protection agencies |
Not applicable.
This unit contains employability skills.
Not applicable.