Helipad Catchments

Open Paved Catchment areas in this case are typically >600 square metres

Clean rainfall arriving on the catchment when the helipad in not is use is directed to stormwater

Typical stormwater Rainfall IFD requires calculation, but will on most cases be >20.0 L/sec and <40.0 L/Sec

The risk of aviation fuel spillage becomes apparent during landing and take-off events at the helipad

Stormwater discharge to the environment requires @ <5ppm hydrocarbon content = Current Industry Best Practice

Installation of a fuel spill retention, isolation and alarm system is required to manage this environmental risk

Ideally the aviation fuel spill retention capacity needs to be 2000 litres

The system requires the ability to isolate the stormwater discharge in the event of a major spill

The system requires an accumulated spill detection alarm to notify when the collection tanks requires evacuation of the floating layer of hydrocarbon

Refer “Alarms” drop down tab for further information

The Alarm system requires an Intrinsically Safe barrier and sensing module as the air space above the water level in the collection tank is classed as a zone 1 explosive hazard

Collection pits or gratings are installed in the catchment pavement, with fire rated discharge pipework directed to the collection, treatment and isolation tank installed at ground level

Conduit materials and signal cable seals to be appropriate for “Flammable Liquid” applications

Product Ref- Option 1

LH-ESK-40-FL-LA – Refer drawing – Pre-cast concrete tank installed at ground level with 300mm inlet and outlet stubs, oil separation medium, spill retention capacity, spill isolation valve, spill sensing probe and remote alarm signaling capability


These projects require input and design assistance available from our engineering department

Little Holland is the approved Distributor of Fox Enviro & Wyuna Separation Technology products in Victoria, Southern NSW and South Australia