Air Products and Chemicals, Inc.                               Louisiana Resources

     Babcock Eagleton Engineering                                 Marathon Oil Company

     Colonial Pipeline Company                                      Memphis Light Gas & Water

     Chevron Texaco Pipe Line Company                       Mid-Valley Pipeline Company

     DOW Chemical Company                                          Mobile Gas

     Dixie Pipeline Company                                           Mustang Engineering, Inc.

     Duke Energy Corporation                                          North Carolina Natural Gas Co.

     DynMcDermott Petroleum Operations Co.                Northern Natural Gas Company

     El Paso ANR Pipeline Company                               P.A.C.E. Engineering Inc.

     El Paso Energy Corporation                                      Paragon Engineering

     El Paso Southern Natural Gas Company                  Plantation Pipeline Company

     Enterprise Products Operating, LP                           Pro Plus, Inc.

     Florida Gas Transmission Company                         Sabine Pipe Line Company

     Formosa Plastics                                                      Shell Oil Products Company

     Gulf Interstate Engineering Company                      Texas Eastern Transmission Corp.

     Gulf South Pipeline Co.                                            Texas Eastern Products Pipeline

     Houston Pipe Line Company                                    Universal Engineering

     Louisiana Intrastate Gas Company                           Williams Companies