Marathon Oil Corporation - US Securities and Exchange Commission

S!}ill Prevention
To prevent spills and discharges. Marathon Oil provides employee
training, procedures. preventive maintenance, equipment inspections
and mechanical safeguards. We investigate spills and
discharges to ident ify t heir cause and take incident-specific and, if
necessary, broad corrective actions including remediation.
Flaring
In 2011, we expanded our track ing protocol by including total fluid
spills greater than 1 barrel, whereas only oil spills were tracked previ ­
ously. Because o f this incremental inclusion, the total number of
spills increased from 2010 to 2011 more than threefold; however. the
total volume of oil spills to the environment decreased 77. percent.
Of the 89 spills in 2011, only two involved volumes greater than 10
barrels spilled to water or 100 barrels spilled to land. No spills were
larger than 150 barrels.
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NOx SOx VOC
Understanding the importance
of flaring issues, Marathon Oil
is a participant in the Globa l
Gas Flaring Reduction (GGFR)
Initiative. GGFR is a World Bankled
public-privat e partnersh ip that
promotes elimination of barriers to
reducing gas flaring and sharing of
best practices.
As a member of GGFR. we
recognize the need. wherever
feasible, to minimize flaring and
venting. In many cases, however.
reductions are inhibited by lack
of infrastructure, regulatory
constraints, market conditions
and/or operational considerations.
Although we continue to consult
t he principles of GGFR, flaring is
and is likely to remain a challenge
for Marathon Oil and the indu stry.