1. Virginia Polytechnic Institute and State Univ.Dep. Crop and Soil Environmental SciencesBlacksburgVA24061
2. USDA–ARS, Environmental Management and Byproduct Utilization Lab.10300 Baltimore Blvd.BeltsvilleMD20705
3. USEPA, National Risk Management Research Lab.5995 Center Hill Rd.CincinnatiOH45224
4. USDA–ARS, Soil and Water Management Res.Univ. of Minnesota458 Borlaug HallSt. PaulMN55108
5. Metropolitan Water Reclamation District of Greater ChicagoLue‐Hing R&D Complex6001 W. Pershing Rd.CiceroIL60804