Wastewater Designs & Reports + Environmental Consulting services
Types of Land Application Area (LAA)
Initially, with Arcadia Environmental wastewater reports, the assessment will follow the same process above. With consideration of:
- Land surface features eg. slope, existing buildings and services, potential environmental factors and other constraints;
- Top and subsoil classification determining soil profile and soil features within the proposed Land Application Area LAA;
- Testing the soil permeability to determine hydraulic conductivity and to identify the correct soil category. This enables the calculation of Design Irrigation Rate (DIR) and Design Loading Rate (DLR);
- The number of "habitable rooms" (bedrooms) of the property +/- existing dwellings (bathrooms are not relevant).
Once all the information from the desktop study and site investigation is gathered, the appropriate Land Application Area can be determined. It will be most commonly one of the following:
- Above ground spray irrigation onto a grassed or planted mulched area (cheapest and easiest to maintain);
- Covered surface drip irrigation into a garden bed or into a planted mulched area;
- Shallow sub-surface pressure compensating drip irrigation under turf/existing grassed area;
- Conventional trenches/absorption beds;
- Self-supporting arch trench (in areas where the soil is sand);
- Evapo-Transpiration-Absorption (ETA) beds/trenches;
- Wisconsin Mound - a large above ground bed used where ground water is within the absorption zone or the ground is impermeable to water/effluent.
Arcadia Environmental septic conversions Queensland.