1 EXHIBIT 4-C SIXTH AMENDMENT TO LOAN AGREEMENT THIS SIXTH AMENDMENT TO LOAN AGREEMENT (this "Sixth Amendment") is made and entered into as of the 29th day of October, 1999, by and among SERVICE TRANSPORT COMPANY, a Texas corporation ("Service...Loan Agreement • March 17th, 2000 • Adams Resources & Energy Inc • Wholesale-petroleum & petroleum products (no bulk stations) • Texas
