Our operations generate a variety of waste streams, including: scrap metal; tank and equipment cleaning residue; filters; contaminated soil; and office domestic waste such as paper and light bulbs.
Marathon Oil’s waste management practices for handling hazardous and other regulated waste comply with all federal and state regulations. Company assets develop waste management programs targeting their specific operations. During the drilling and completions phases, we capture residuals (a mixture of mud, cuttings, sand and fluids) and dispose of them in accordance with applicable regulations in all of our operating areas. Disposal of residual drilling and completions waste is tightly regulated by individual states where we operate. While regulations differ slightly among states, they generally have requirements for classifying, manifesting, transportation and disposal methods.
Offsite disposal and recycling increased from approximately 26,000 tons in 2017 to about 73,000 tons in 2018, primarily due to increases in disposal of impacted soil in our U.S. assets, and naturally occurring radioactive material (NORM) waste in North Dakota. Produced water, drilling muds and cuttings, and completions fluids are not included in the waste inventory in accordance with IPIECA’s Oil and Gas Industry Guidance on Voluntary Sustainability Reporting.
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