Petro-Barrier™ plug used in conjunction with an SPI liner system. The area around the substation was excavated to install a containment liner for all the oil in the transformer plus rainwater.
A trench provides drainage from the Petro-Barrier™ plug into the grounding grid to provide moisture for the grid.
The Petro-Barrier™ plug housing is installed and surrounded with crushed stone for water drainage. The liner is then attached to the plug housing providing a water/oil seal so the only drainage is through the Petro-Barrier™ plug.
The liner, a solid piece of 30 oz XR5 modified vinyl, is attached to the concrete pad with aluminum strips, screws and sealant. All areas where conduit or grounding wires come through the liner are completely sealed. The Petro-Barrier™ plug will slide into the housing that is attached to the liner. The plug and housing, which are flanged, attach to the liner with screws and can be removed and replaced as needed.
The liner, which comes delivered in one piece, has 12” high walls and is supported by angle brackets every two feet. The liner Is custom-made to accommodate the oil volume of the transformer and rainwater.
The liner is in place and the Petro-Barrier™ plug is installed. A pre-filter is used over the Petro-Barrier™ plug and the lined area is backfilled with crushed stone. Installation required four men and a backhoe one day.
The Oil Stop Valve is sitting inside the concrete sump and the heater rests on the fiberglass grate. This was installed to keep the stop valve from freezing in cold weather.
The heater has had the electricity disconnected and is removed and disposed of.
The Oil Stop Valve is removed by cutting away at the connections. This technology uses a float system that detects if oil is present. If the specific gravity changes with oil, the float moves and shuts off the system.
The valve is removed. Maintenance was required on a regular basis to keep the valve in proper operation but was not performed causing the valve to no longer work.