1. CSS Management Corporation, U.S. patent 4,655,829 (April 7,1987).
2. A. Davis, “Anaconda Smelter Flue Dust Cashman Process Residue Long-Term Stability Study” (Boulder, CO: PTI Environmental Services, 1990).
3. Toxicity Leach Procedures (TCLP) (40 CFK, part 268: App 1).
4. “Comprehensive Feasibility Study of the Arsenical Flue Dust Treatment Anaconda, Montana,” I (1) (San Francisco, CA: Bechtel Corporation, March 1990), p. 7.
5. Vendor quotes (Koch-Knight #918-057 BP).