Marathon Oil maintains a vetting and monitoring program for disposal sites, which is tailored based on the wastes disposed. The program reviews the regulatory status of existing facilities every three years and new facilities upon request for approval. Salt water disposal sites are reviewed for seismic risk prior to approval and asset teams perform on-site inspections for 10% of approved disposal sites annually.
Marathon Oil’s waste management procedures for handling hazardous and other regulated waste comply with all federal and state regulations.
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.
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. Refer to our Water Stewardship section for discussion of produced water recycling.
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