1. Res. Engr., Ctr. for Energy and Envir. Resour. (R7100), The Univ. of Texas at Austin, 10100 Burnet Rd., Austin, TX 78758.
2. Assoc. Prof. and Leland Barclay Fellow, Dept. of Civ. Engrg. (ECJ8.6), The Univ. of Texas at Austin, Austin, TX.
3. Mgr., Envir. Solutions Program, Ctr. for Energy and Envir. Resour. (R7100), The Univ. of Texas at Austin, 10100 Burnet Rd., Austin, TX.