(See also on chemical and waste management.)
Laboratory waste that is both chemically hazardous and exhibits a biological characteristic (depicted in ) merits special disposal procedures. Animal and medical waste incinerators are usually not licensed
Chemical Waste Management | Environmental Health …
to incinerate regulated chemical waste. Autoclaving or disinfection of chemical-biological waste usually does not destroy its chemically hazardous constituents, except for denaturing proteins and nucleic acids.
Because of the great variety of laboratory mixed waste, it is often difficult to find a facility that can manage both the radioactive and the chemical hazards of the waste. In general, existing commercial disposal facilities are in business to manage mixed waste from the nuclear power industry, not waste from laboratories. Several commercial disposal facilities that accept mixed waste from off-site generators do exist in the United States. These sites have the capacity to manage liquid scintillation fluid, halogenated organics, and other organic waste. Treatment capacity exists for stabilization, neutralization, decontamination/ macroencapsulation of lead, and reduction of chromium waste.
Household Chemical Waste (HCW) | Lake County …
Some trichloroacetic acid (TCA) solutions contain chloroform in excess of 6 ppm. Such a solution is considered a hazardous chemical waste because it fails the TCLP test. If the neutralized solution is not acceptable to the sewage treatment plant because of the presence of chloroform, it may be possible to remove that component from the solution by filtration through activated charcoal. The resulting radioactive filtrate can usually be disposed of in the sanitary sewer, and the contaminated charcoal can usually be disposed of as a chemical waste.
How to Store and Dispose of Hazardous Chemical Waste
The worker can reduce the chemical hazard to a safe level and then handle the material as only a radioactive hazardous waste. Many low-level radiation materials can then be allowed to decay to a safe level, following which simple disposal is allowable.
EHS: Waste Recycling & Disposal - Chemical Waste
Although EPA is proposing to regulate transgenic plants that express insecticidal proteins, most types of chemical-biological waste are not regulated by EPA as a hazardous (RCRA) chemical waste. Waste (or spent) formalin that has been used in a process such as tissue preservation is not a discarded commercial chemical product and therefore is not regulated federally. However, its handling should be consistent with personal and environmental safety and within the limits set by local regulation. Animal tissue is regulated as chemical waste only in the unlikely circumstance that it contains a toxic chemical and the waste fails the TCLP test, or if the animal had been exposed to polychlorinated biphenyls (PCBs) in concentrations greater than 50 ppm.
Chemical Wastes What is a Chemical waste
Nevertheless, there are still justifiable and legal reasons to carry out such operations in the laboratory when hazards can be reduced safely. Neutralization, oxidation, reduction, and various other chemical conversions as well as physical methods of separation and concentration can be applied prudently to many laboratory-scale mixed wastes. However, the dual character of the hazard, chemical and radioactive, requires that additional precautions be exercised. Treatment for the chemical hazard must not create a radioactivity risk for personnel or the environment. For example, vapors or aerosols from a reaction, distillation, or evaporation must not lead to escape of unsafe levels of radioactive materials into the atmosphere. Fume hoods appropriate for such operations should be designed to trap any radioactive effluent. When mixed waste is made chemically safe for disposal into the sanitary sewer, the laboratory must ensure that the radioactivity hazard is below the standards set by the publicly owned treatment works (POTW). Several examples for reducing the hazard of mixed waste are described below: