| | Name : | Fred M. Fehsenfeld | | Title : | Chairman of the Board of the General Partner | | Since: | 1990 |
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| | Name : | F. William Grube | | Title : | President, Chief Executive Officer, Director of the General Partner | | Since: | 1990 |
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| | Name : | R. Patrick Murray | | Title : | Chief Financial Officer, Vice President and Secretary of the General partner | | Since: | 1999 |
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| | Name : | Allan A. Moyes | | Title : | Executive Vice President of the General Partner | | Since: | 1997 |
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| | Name : | William A. Anderson | | Title : | Vice President of Sales and Marketing of the General partner | | Since: | 2000 |
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| | Name : | Robert M. Mills | | Title : | Vice President - Crude Oil Supply of the General partner | | Since: | 1995 |
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| | Name : | Jeffrey D. Smith | | Title : | Vice President - Planning and Economics of the General partner | | Since: | 2002 |
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