Surficial Gas Collection System
The SGCS is cutting edge technology that outperforms conventional gas collection systems on every metric. In many cases, you can eliminate or at least reduce the need for deep gas wells.
The system relies upon positive internal landfill pressures to push the gas to the surface below the membrane. The membrane is an impermeable shield that prevents gas (fugitive emissions) from escaping into the atmosphere.
The SGCS strips create a designed capacity pathway across the gas field for the gas to travel to the collection points (surficial collection wellheads).
Negative pressures are introduced in at the wellhead into collection base through and beneath the membrane where the gas is trapped for collection. As the gas moves through the SGCS wellhead and into the collection header the gas can be monitored as required by regulations.
The Pressure Relief Valve is placed in the gas field away from the surficial collection strips and is designed to remain sealed during active gas collection and release in the event the primary system malfunctions to prevent (ballooning) gas buildup beneath the membrane.
The Automatic Isolation Valve is placed either in the SGCS wellhead or header system. The valve`s primary function is to prevent gas backflow from adjacent non-ClosureTurf areas during malfunction periods of the primary gas collection system.