1. Environmental & Waste Technology CenterBrookhaven National LaboratoryBldg. 830, 34 North Railroad St.UptonNew York11973‐5000
2. MSE Technology Applications, Inc.P.O. Box 4078ButteMT59702
3. USDA‐ARS, Plant, Soil and Nutrition Laboratory, Cornell UniversityIthacaNY14853