Marathon’s Corporate Social Responsibility Performance Data

This table contains data relevant to Marathon's environmental performance. See full CSR Performance Data table for complete notes regarding reporting. In this table, some totals may not equal the sum of their components and separate calculation of other data may be affected due to independent rounding. The metrics below are for operations under direct Marathon management and operational control. GHG emissions are estimated using industry guidelines (API's Compendium of Greenhouse Gas Emissions Methodologies for the Oil and Gas Industry and the API, IPIECA and OGP Petroleum Industry Guidelines for Reporting Greenhouse Gas Emissions).


 
Performance Areas 2006 2007 2008 2009 2010
Environmental Stewardship
GHG Emissions – Global a, b
Direct Emissions – million tonnes CO2e 14.9 14.6 14.0 13.7 13.9
Indirect Emissions – million tonnes CO2e 4.26 4.49 4.62 4.55 4.92
Total GHG Emissions – million tonnes CO2e 19.2 19.0 18.7 18.3 18.8
GHG Intensity – tonnes CO2e on a weighted basis/Production and Throughput 29.2 30.3 30.6 30.0 28.1
GHG Emissions – by Segment a, b
Downstream GHG Emissions – million tonnes CO2e 14.0 13.9 13.7 13.7 14.7
Downstream GHG Intensity – tonnes CO2e/MBBL Refinery Throughput 31.7 31.1 32.4 32.6 30.1
Upstream GHG Emissions – million tonnes CO2e 5.1 5.2 5.0 4.6 4.13
Upstream GHG Intensity – tonnes CO2e/MBOE Production 23.0 28.3 25.6 22.1 21.0
 
Energy Use b – trillion BTU 257 259 256 255 271
Other Operational Air Emissions – Global c
Sulfur Dioxide (SOx) – tons 9,210 7,787 7,607 2,177 na
Nitrogen Oxides (NOx) – tons 22,858 24,289 24,344 11,910 na
Volatile Organic Compounds (VOCs) – tons 12,373 10,976 10,989 14,867 na
Carbon Monoxide (CO) – tons 12,184 12,290 13,697 7,260 na
Particulate Matter (PM) – tons 2,327 2,347 2,315 2,003 na
Other Operational Air Emissions – by Segment c
Downstream Sulfur Dioxide (SOx) – tons 4,624 3,648 2,992 2,118 na
Downstream Nitrogen Oxides (NOx) – tons 7,269 7,116 6,666 6,090 na
Downstream Volatile Organic Compounds (VOCs) – tons 8,982 7,333 7,498 7,396 na
Downstream Carbon Monoxide (CO) – tons 4,900 4,958 4,501 4,271 na
Downstream Particulate Matter (PM) – tons 2,119 2,094 2,059 1,928 na
Upstream Sulfur Dioxide (SOx) – tons 4,586 4,139 4,615 59 na
Upstream Nitrogen Oxides (NOx) – tons 15,589 17,173 17,678 5,820 na
Upstream Volatile Organic Compounds (VOCs) – tons 3,391 3,643 3,491 7,471 na
Upstream Carbon Monoxide (CO) – tons 7,284 7,332 9,196 2,989 na
Upstream Particulate Matter (PM) – tons 208 253 256 75 na
Toxic Release Inventory (TRI - Downstream) d – tonnes 1,000 942 1,075 1,122 na
Oil Spills (Global) b, e – number 60 43 57 111 126
Volume of Oil Spilled (Global) b, e – barrels 1,077 428 9,113 2,272 960
Oil Spills (by Segment)
Downstream Oil Spills – number 10 13 24 56 77
Downstream Spill Volume – barrels 432 117 8,722 1,603 521
Downstream Spill Rate – barrels spilled/Refinery Throughput 0.97 0.26 20.71 3.81 1
Upstream Oil Spills – number 50 30 33 55 49
Upstream Spill Volume – barrels 645 311 392 669 439
Upstream Spill Rate – barrels spilled/Company-operated Oil Production 7.89 5.08 5.25 6.97 5
Environmental Expenditures – million dollars 505 511 826 801 755

a. GHG carbon dioxide equivalent (CO2e) emissions are based on carbon dioxide, methane, nitrous oxide; Downstream emissions also include sulfur hexafluoride.
    Reflects emissions from Marathon-operated facilities; non-operated interests are not included.
b. Some data updated due to improved methodologies, corrected calculation errors, or other reporting revisions.
c. Criteria pollutant data reported one year in arrears. 2008 VOC data adjusted to include emissions not previously reported from Upstream International Production
    Operations (IPO) 2009 data include Downstream and Upstream IPO only; North America Production Operations 2009 data not available because of an ongoing
    switch to a new database that will increase the accuracy and completeness of emissions calculations.
d. Toxic Release Inventory (TRI) data include air, water and land releases and offsite disposal, reported in accordance with U.S. EPA requirements.
    Data reported one year in arrears.
e. 2009 and 2010 spill data reflect a revised reportable oil spill definition to include all oil spills equal to or greater than 1 barrel and all reportable oil spills regardless
    of size. Oil spills include any liquid hydrocarbon release, including crude oil, natural gas condensates and refined products
    na = Not Available.