At high risk sites like petrol stations and fuel depots, spills or overflows of petrol, oil or diesel need to be contained to prevent them from entering the stormwater drainage system.
Global Water’s EcoTreat Full Retention device effectively treats every day episodic spills of diesel and oil, plus contains major spills that may occur.
The Full Retention FR Series is fitted with a coalescing treatment device that ensures that any hydrocarbon contaminated run-off is treated to comply to the stringent Class 1 requirements of the EN 858-1, with a stormwater discharge quality of less than 5 mg/L oil content.
The EcoTreat Full Retention is suitable for secondary stormwater treatment, successful in removing sediment, suspended solids, hydrocarbons and nutrients.
- fuel depots and refuelling stations
- petrol station forecourts
- industrial loading zones
- aircraft / helicopter facilities
- commercial trucking yards
- mining and heavy service areas
- transformer stations and wind farms
A full-scale performance test of the Global Water EcoTreat Full Retention Oil/Water Separator was conducted by the University of South Australia.
Five samples were collected using the outflow arrangement in accordance with the requirements of EN 858-1:2002. The table below shows the total recoverable hydrocarbons (THR) results, in accordance with the definitions and reporting fractions for hydrocarbon analysis of samples as per the National Environmental Protection (Assessment of Site Contamination) Amendment Measure 2013 (No 1).
The mean concentration of the outflow tested C6-C40 was 1.52 mg/L, considerably better than the minimum 5 mg/L requirements of Class 1 water quality requirements of European Standard EN 858-1, which is recognised universally across Australia as best practice by regulatory bodies.
ECOTREAT GROSS POLLUTANT TRAP (OPTIONAL)
The Ecotreat Gross Pollutant Trap acts as a catchment sump and is particularly useful where there is a high solids loading. The internal silt basket removes a high percentage of sand and silt, reducing the load on the downstream treatment device.
EMERGENCY STORAGE CHAMBER
In high-risk environments, where a major spill can occur, an Emergency Storage Chamber is installed prior to the EcoTreat Full Retention. This ensures the entire spill is contained during a catastrophic event.
The inlet pipe has a liquid seal which prevents flammable vapours from venting up into the pipework system.
COALESCING TREATMENT DEVICE
All run-off passes through a coalescing treatment device which combines small droplets of light liquids such as oil and diesel, allowing them to be trapped and removed, ensuring the oil content in the outflow is less than 5 mg/L. This meets the requirements of a Class 1 gravity supply device, in accordance with EN 858-1.
AUTO CLOSURE DEVICE (ACD)
The ACD is engineered to be sensitive to changes in liquid density as a result of fuel, oil or diesel build-up. In the event of a spill, the ACD shuts off the outlet and stops any further discharge, containing the spill on site and preventing any contamination of the stormwater system.
OIL SENSING PROBE (OPTIONAL)
An optional Oil Sensing Probe allows continual monitoring of hydrocarbon accumulation. When the level reaches the predetermined depth, an alarm is triggered signalling that a spill has occurred or that the unit requires maintenance.
SILT ALARM (OPTIONAL)
A Silt Alarm Probe can be mounted inside the main chamber to give a fault signal when there is an excess build-up of silt and sludge.
The EcoTreat range includes a Bypass Oil/Water Separator as well as the Full Retention device. More information on the collection of stormwater products is available in the brochure.
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