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   &lt;div align="left" style="font-size: 10pt; margin-top: 20pt"&gt;&lt;b&gt;Note 13&amp;#8212;Contingencies and Commitments&lt;/b&gt;
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt"&gt;In the case of all known contingencies (other than those related to income taxes), we accrue a
   liability when the loss is probable and the amount is reasonably estimable. If a range of amounts
   can be reasonably estimated and no amount within the range is a better estimate than any other
   amount, then the minimum of the range is accrued. We do not reduce these liabilities for potential
   insurance or third-party recoveries. If applicable, we accrue receivables for probable insurance
   or other third-party recoveries. In the case of income-tax-related contingencies, we use a
   cumulative probability-weighted loss accrual in cases where sustaining a tax position is less than
   certain.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt"&gt;Based on currently available information, we believe it is remote that future costs related to
   known contingent liability exposures will exceed current accruals by an amount that would have a
   material adverse impact on our consolidated financial statements. As we learn new facts concerning
   contingencies, we reassess our position
   both with respect to accrued liabilities and other potential exposures. Estimates particularly
       sensitive to future changes include contingent liabilities recorded for environmental remediation,
       tax and legal matters. Estimated future environmental remediation costs are subject to change due
       to such factors as the uncertain magnitude of cleanup costs, the unknown time and extent of such
       remedial actions that may be required, and the determination of our liability in proportion to that
       of other responsible parties. Estimated future costs related to tax and legal matters are subject
       to change as events evolve and as additional information becomes available during the
       administrative and litigation processes.
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   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt"&gt;&lt;b&gt;Environmental&lt;/b&gt;&lt;br /&gt;
   We are subject to federal, state and local environmental laws and regulations. These may result in
       obligations to remove or mitigate the effects on the environment of the placement, storage,
       disposal or release of certain chemical, mineral and petroleum substances at various sites. When
       we prepare our consolidated financial statements, we record accruals for environmental liabilities
       based on management&amp;#8217;s best estimates, using all information that is available at the time. We
       measure estimates and base liabilities on currently available facts, existing technology, and
       presently enacted laws and regulations, taking into account stakeholder and business
       considerations. When measuring environmental liabilities, we also consider our prior experience in
       remediation of contaminated sites, other companies&amp;#8217; cleanup experience, and data released by the
       U.S. Environmental Protection Agency (EPA)&amp;#160;or other organizations. We consider unasserted claims
       in our determination of environmental liabilities, and we accrue them in the period they are both
       probable and reasonably estimable.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt"&gt;Although liability of those potentially responsible for environmental remediation costs is
       generally joint and several for federal sites and frequently so for state sites, we are usually
       only one of many companies cited at a particular site. Due to the joint and several liabilities,
       we could be responsible for all cleanup costs related to any site at which we have been designated
       as a potentially responsible party. If we were solely responsible, the costs, in some cases, could
       be material to our results of operations, capital resources or liquidity, or to those of one of our
       segments. However, settlements and costs incurred in matters that previously have been resolved
       have not been material to our results of operations or financial condition. We have been
       successful to date in sharing cleanup costs with other financially sound companies. Many of the
       sites at which we are potentially responsible are still under investigation by the EPA or the state
       agencies concerned. Prior to actual cleanup, those potentially responsible normally assess the
       site conditions, apportion responsibility and determine the appropriate remediation. In some
       instances, we may have no liability or may attain a settlement of liability. Where it appears that
       other potentially responsible parties may be financially unable to bear their proportional share,
       we consider this inability in estimating our potential liability, and we adjust our accruals
       accordingly.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt"&gt;As a result of various acquisitions in the past, we assumed certain environmental obligations.
   Some of these environmental obligations are mitigated by indemnifications made by others for our
       benefit and some of the indemnifications are subject to dollar limits and time limits. We have not
       recorded accruals for any potential contingent liabilities that we expect to be funded by the prior
       owners under these indemnifications.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt"&gt;We are currently participating in environmental assessments and cleanups at numerous federal
       Superfund and comparable state sites. After an assessment of environmental exposures for cleanup
       and other costs, we make accruals on an undiscounted basis (except those acquired in a purchase
       business combination, which we record on a discounted basis) for planned investigation and
       remediation activities for sites where it is probable future costs will be incurred and these costs
       can be reasonably estimated. At March&amp;#160;31, 2010, our balance sheet included a total environmental
       accrual of $979&amp;#160;million, compared with $1,017&amp;#160;million at December&amp;#160;31, 2009. We expect to incur a
       substantial amount of these expenditures within the next 30&amp;#160;years. We have not reduced these
       accruals for possible insurance recoveries. In the future, we may be involved in additional
       environmental assessments, cleanups and proceedings.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt"&gt;&lt;b&gt;Legal Proceedings&lt;/b&gt;&lt;br /&gt;
   Our legal organization applies its knowledge, experience and professional judgment to the specific
       characteristics of our cases, employing a litigation management process to manage and monitor the
       legal proceedings against us. Our process facilitates the early evaluation and quantification of
       potential exposures in
   individual cases. This process also enables us to track those cases that have been scheduled for
       trial, as well as the pace of settlement discussions in individual matters. Based on professional
       judgment and experience in using these litigation management tools and available information about
       current developments in all our cases, our legal organization believes there is a remote likelihood
       future costs related to known contingent liability exposures will exceed current accruals by an
       amount that would have a material adverse impact on our consolidated financial statements.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt"&gt;&lt;b&gt;Other Contingencies&lt;/b&gt;&lt;br /&gt;
   We have contingent liabilities resulting from throughput agreements with pipeline and processing
       companies not associated with financing arrangements. Under these agreements, we may be required
       to provide any such company with additional funds through advances and penalties for fees related
       to throughput capacity not utilized. In addition, at March&amp;#160;31, 2010, we had performance
       obligations secured by letters of credit of $1,850&amp;#160;million (of which $40&amp;#160;million was issued under
       the provisions of our revolving credit facility, and the remainder was issued as direct bank
       letters of credit) related to various purchase commitments for materials, supplies, services and
       items of permanent investment incident to the ordinary conduct of business.
   &lt;/div&gt;
   &lt;div align="left" style="font-size: 10pt; margin-top: 10pt"&gt;&lt;b&gt;Long-Term Throughput Agreements and Take-or-Pay Agreements&lt;/b&gt;&lt;br /&gt;
   We have certain throughput agreements and take-or-pay agreements to support financing arrangements.
   The agreements typically provide for natural gas or crude oil transportation to be used in the
       ordinary course of the company&amp;#8217;s business. The aggregate amounts of estimated payments under these
       various agreements are: 2010&amp;#8212;$125&amp;#160;million; 2011&amp;#8212;$125&amp;#160;million; 2012&amp;#8212;$122&amp;#160;million; 2013&amp;#8212;$120&amp;#160;million;
       2014&amp;#8212;$121&amp;#160;million; and 2015 and after&amp;#8212;$308&amp;#160;million. Total payments under the agreements were
   $114&amp;#160;million in 2009, $119&amp;#160;million in 2008 and $103&amp;#160;million in 2007.
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