Environment

Marathon is striving to reduce its environmental impacts, while expanding its operations to meet growing energy demand. Efforts include decreasing operational use of natural resources, reducing emissions through energy efficiency improvements, and investing in new technologies and renewable energy resources.

Spills and Discharges

Marathon uses environmental metrics to measure performance and identify improvement opportunities. Oil spills are a principal environmental performance indicator due to their potential impacts on the environment. To prevent spills and discharges, Marathon provides
training, procedures, preventive maintenance, equipment inspections and mechanical safeguards. Investigations identify the cause of spills and discharges and corrective actions are taken.

Wastes and Residual Materials

Marathon complies with all waste regulations throughout its worldwide operations and conducts programs to reduce the volumes of hazardous and non-hazardous materials it generates. Programs for waste minimization, recycling, reuse and reclamation are developed by Marathon facilities based on their specific needs. Historically, Marathon business units have monitored their own waste disposal activities. In 2009, we initiated collection and analysis of waste management data from all Downstream business units to identify and prioritize opportunities for waste minimization. In 2010, we will include Upstream business units in this evaluation.

Emissions

As Marathon expands its operations to meet the increasing demand for energy, its emissions will increase. However, Marathon is committed to minimizing all types of emissions. An evaluation of emission reduction opportunities is conducted for new facility construction and periodically for existing operations. Current reduction efforts include cost-effective energy efficiency measures; incident prevention and prudent operations to reduce flaring; and use of best control practices.