1. Assoc. Prof., Dept. of Safety, Health, and Envir. Engrg., Nat. Lien-Ho Inst. of Technol., Miao-Li, 360, Taiwan, R.O.C.
2. Prof. of Grad. Inst. of Envir. Engrg., Nat. Central Univ., Chung-Li 320, Taiwan, R.O.C.
3. Envir. Engr. of Envir. Sci. and Technol. Ctr., China Technology Consultants, Inc., Taipei, 106, Taiwan, R.O.C.
4. Prof. of Grad. Inst. of Envir. Sci., Tunghai Univ., Taichung 407, Taiwan, R.O.C.