Thousand Metric Tons
Volume of waste generated varies year on year due to periodic maintenance activities; a focus on recycling has improved volumes since 2008. About 50 percent of the total waste generated each year is being recycled.
Our natural gas gathering, processing, transmission, storage and distribution businesses generate solid and liquid waste streams, both hazardous and non-hazardous. Our business units’ hazardous waste primarily consists of pipeline liquids containing solids, liquids and sludges. Primary types of non-hazardous waste include wastewater and PCB-containing solids. Both hazardous and non-hazardous wastes are disposed of by licensed waste disposal companies. Waste volumes vary annually according to business unit activity level, according to operational and maintenance activity levels.
In 2010, our U.S. Transmission business conducted waste minimization pilot programs at four facilities that identified opportunities for increased recycling and reduction of hazardous waste. This has resulted in a 50 percent increase in the amount of recyclables generated in 2012 and a 20 percent decrease in the volume of hazardous waste generated in 2012.