PAN-ALBERTA/UNITED GAS SETTLEMENT APPROVED Pan-Alberta Gas Ltd said its 1986 proposed settlement with United Gas Pipe Line Co, of Houston, received unconditional approval by the U.S. Federal Energy Regulator Commission. Pan-Alberta said the approved deal authorized terms of a two-year interim contract amendment, cash payments and transportation credits for Pan-Alberta's customers, minimum yearly natural gas takes by United and a two-year commodity price. United will pay Pan-Alberta producers about 50 mln dlrs over the interim period and take at least an average 40 mln cubic feet a day of gas, Pan-Alberta said.