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Hydraulic Engineering

Effluent Disposal Design

For buildings requiring on-site effluent disposal, the design of the effluent disposal system follows on from a site and soil (permeability) evaluation. It involves proposing the most suitable design solution, including location and system type (including primary/secondary treatment options).

Our design process includes:

  • Reviewing architectural plans
  • Drafting site layout
  • Technician review of site and soil evaluation results and client preferences (system type, location, etc.)
  • Design report compiled by a registered professional engineer
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When is it required?

Some project sites are in unsewered areas, and may require on-site effluent disposal, such as a septic system. Some may also consider on-site disposal for financial, environmental, or resource reasons. Our evaluation and design process helps you choose the best option and can be effectively used by builders, owners, plumbers, and system suppliers.

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What's included?

The PDF report is compiled and signed by a registered professional engineer, together with the qualified site and soil evaluator’s report. The design details typically include (where applicable):

  • Suitable location of effluent disposal area
  • Suitable location of disposal reserve area
  • Selection and detailing of disposal type
  • Required minimum offsets (boundaries, structures, etc.)

Hydraulic experts

With over 30 years’ design experience across thousands of Australian builds, we’re trusted by owners, developers, and builders across Australia.

NATA lab

With our own NATA accredited laboratory, we thoroughly test and analyse soils. Because we have full control over the testing process, we produce extremely reliable data for every project.

Clear communication

From order placement through to job completion, STA makes it easy for you to track the status of your project.

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One engineer for all your needs

Every building project is different, requiring a combination of engineering disciplines. From bottom to top, our engineers can work on soil testing and foundations, all the way up to frame and roof truss design and even inspections. We believe these shouldn’t be thought of as separate, unrelated services.

Whether you’re renovating, extending, building a brand new home, or putting in a pool, you can gain significant benefits from understanding (in advance) the full range of engineering services you might need — and from using the same engineer for all these services.
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Key advantages of integrated services

STA is a one-stop engineer with a service range that delivers three key advantages:

  • Save time and money

Pre-planning your engineering needs means you won’t have to keep re-booking an engineer when you need a particular service. It creates efficiencies that cut service times and save you money by pulling together the services you’ll need, at a lower overall price.

  • Enjoy engineering continuity

With all your engineering done by a single organisation, your consultants tap into a deeper knowledge of the site and the project, which leads to high quality outcomes, with more opportunities for innovative solutions.

  • Less risk, more reliability

While STA always takes legal responsibility for its engineering designs, an up-front engineering services package makes it easier to trust our work with a strong mutual commitment, and reduced risk of potential interruption or delay.

How it works

Engineering consideration – We help you think about your project in engineering terms. What specific services might you need?
Packaged plan – We develop a plan that packages up all the engineering services you need for your individual home or build project.
Prescheduled services – With each service pre-scheduled, we can work more closely with you over the life of the project.

Explore our engineering services

Whether you’re a builder, developer, architect or owner, STA has the size and range to cover every possibility, with a team of experts in every engineering specialty. Explore more specific info on:
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More on hydraulic engineering

Work with hydraulic engineering consultants who understand and manage all hydraulic aspects of your site, from flows and drainage, to sustainability and efficiency.
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