AHCDRG502 — Design drainage systems

1 Determine design requirements

• 1.1Determine water transfer, recharge, reuse and harvesting system needs
• 1.2Identify processes of collecting, disposing and storing drainage water to avoid degrading water quality
• 1.3Investigate regional geology and geography to predict drainage parameters
• 1.4Apply hydrological calculations to predict volumes and rates of surface run-off
• 1.5Conduct site investigations to assess depth of clay, depth of ground water, soil and water salinity, and structural or chemical impediments
• 1.6Determine the most cost effective drainage system
• 1.7Document predictions of leaching fractions and salt movements, and develop soil amelioration and drainage management plans
• 1.8Determine the need for leachate interception and dewatering system and if required prepare construction specification for interception and collection, disposal, reuse or recycle
• 1.9Confirm drains and structures are capable of carrying the design water volumes and intensities according to workplace standards
• 1.10Identify construction specifications required to make drainage systems according to environmental and workplace health and safety requirements
• 1.11Identify and protect environmentally sensitive areas according to local, state and federal legislation and regulations

2 Design a drainage system

• 2.1Select systems, including relevant equipment, to move water efficiently to water storage or treatment and at the flow and pressure required in design specifications
• 2.2Select system combinations that are efficient, reliable, functional, serviceable and flexible for the intended application
• 2.3Determine energy requirements and check layout of electricity lines with local authority if electrical pumps and motors are used in the system
• 2.4Select and integrate structures, pipes, valves and accessories into a functional system that can be monitored and maintained
• 2.5Define the work required to make suitable drainage systems available to the workplace in the design specifications
• 2.6Confirm power supply design specification with power authorities if electrical pumps and motors are used in the system
• 2.7Minimise drainage system design damage based on current industry practice
• 2.8Document drainage system design based on current industry practice
• 2.9Confirm design output with an appropriately experienced and qualified person

3 Determine capital expense budget

• 3.1Estimate materials required from plans and specifications
• 3.2Estimate labour requirements based on documented work schedule with reasonable allowance for variances in work schedules
• 3.3Base costing for each component on quoted information from suppliers, or sound analysis of individual elements
• 3.4Document design calculations, performance indicators and decisions and relevant information in plans, specifications and manuals
• 3.5Document capital expense budget based on current industry practice
• 3.6Confirm capital expense budget output with an appropriately experienced and qualified person

4 Determine operating expense budget

• 4.1Optimise the relationship between capital and operational costs including a comparison of energy sources
• 4.2Collate all operating expense applicable to the completed drainage system and calculate an operating expense budget
• 4.3Document operating expense budget based on current industry practice

What does an assessment tool for AHCDRG502 need to cover?

To satisfy the Principles of Assessment and Rules of Evidence, an assessment for AHCDRG502 needs to address all 43 unit components: 4 elements with 29 performance criteria, 8 performance evidence requirements, 4 knowledge evidence requirements, and the foundation skills. A coverage matrix mapping each question and task to these components is what an auditor looks for.

How does Auditori generate an assessment tool for AHCDRG502?

Auditori pulls the current release of AHCDRG502 from training.gov.au and generates a complete package: candidate assessment, assessor guide with model answers and observation criteria, and a coverage matrix mapping every component. A suitably qualified person then reviews and approves the draft in a built-in workflow — consistent with ASQA's guidance on AI use in VET — before export as branded PDF and editable Word.

Is the first assessment tool really free?

Yes. Every new account includes one free credit — enough to generate the complete assessment tool for AHCDRG502 — with no card and no subscription required. After that it's pay-as-you-go per unit.

Can I check my existing AHCDRG502 assessment instead of generating a new one?

Yes — upload your existing assessment or learner guide and Auditori maps it against every element, performance criterion, PE and KE of AHCDRG502, showing exactly what's covered and what's missing. Mapping costs a quarter of a credit.