EXHIBIT 10.6 Genesis Energy, L.L.C. Paul A. Scoff General Counsel & Corporate Secretary October 29, 1999 Ben Runnels 3607 Oak Lake Dr. Kingwood, TX 77339 Re: Employment Agreement between Ben Runnels and Genesis Energy, L.L.C. Dear Ben, Pursuant to the terms of the Employment Agreement (hereinafter "Agreement") between yourself and Genesis Energy, L.L.C., Genesis hereby provides notice that it is electing to exercise its option to extend the Agreement for two years (the "First Extension Term") up to and including December 31, 2001. The Agreement provides for a compensation increase of 1.05 times your current base compensation. Such increase shall be effective with the start of the First Extension Term on January 1, 2000. If you have any questions please do not hesitate to contact my office. Sincerely, /s/ Paul A. Scoff Paul A. Scoff cc: Joe Mueller