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. Saltwater 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 completion phases, we capture residuals (a mixture of mud, cuttings, sand and fluids) and dispose of them in accordance with applicable regulations in each of our operating areas. Disposal of residual drilling and completion 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.
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