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Wastewater lagoon construction guidelines

Environment Protection Authority Wastewater guidelines Wastewater lagoon construction Updated April 2019 EPA 509/19 : This guideline replaces Wastewater and evaporation lagoon construction (2004). It advises those proposing to build Wastewater lagoons on construction techniques that should assist in meeting obligations under the Environment Protection Act 1993 and relevant environment protection policies. The guideline is intended for Wastewater lagoon proponents and their engineers or consultants. This guideline is not intended for leachate lagoons for landfill facilities.

• The compacted clay liner must have a minimum thickness of 300 mm and be constructed in two layers of p. 10 ... 300 mm of non-dispersive fine grained soil which will confine a swelling GCL when it becomes hydrated ... based on wastewater characteristics, groundwater/aquifer characteristics, climatic factors and warranty considerations.

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