Oil is used extensively in all types of transportation. Oil leaks can occur during fueling and maintenance, and also during regular operation. These oils include fuels and lubricants.
• Trains: Underground railways and railways in tunnels have drainage colleting sumps for water. The water is pumped out, but if oil is detected the water must be diverted for treatment. Oil cannot be left in such sumps as it can create an explosive atmosphere hazard. For example, 44 Leakwise ID-221 Oil Sheen Detectors inside 4 to 8 meters deep sumps, with
22 SLC-220 Digital Controllers, are being installed in a railway tunnel system in the UK.
• Buses, Cars: Parking lots, garages, highways, gas stations. All have a potential of spills to public water. For example, three ID-223/2000 sensors and one SLC-220 controller are being installed in a Texas roadway tunnel to monitor the tunnel drainage sump pits and automatically turn off the pit pumps when oil is detected.
ID-221 Monitoring Runoff from a Highway Junction