- Linpro Petroleum Services Limited
- Provides oil companies, environmental consulting firms, and the private sector with a range of contracting services. - Rivertrace Engineering Ltd
- Specialists in instrumentation for oil-in-water monitoring. - REL Instrumentation Limited
- Developers of pipeline dynamic and static leak detection systems for the oil, gas, and water industries. - Vista Research, Inc.
- Making underground pipeline leak detection systems. - Soluble Solutions
- Offers consulting, project work, teaching of customised courses, and laboratory tests to help the petroleum industry to control petroleum fouling. - Douglas Engineering
- Manufacturer of oil skimmers, decanters and other removal equipment for industrial waste water, storm water, and emergency spill response. - United Soil Recycling
- Has developed a treatment technology for soil contaminated with petroleum products.
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