Office of Emergency Management | Environment, Health & Safety | Chemical Safety |

Treatment of Hazardous Chemical Waste

The treatment of hazardous waste may still result in the generation of residuals which may have to be managed as hazardous waste. The treatment of hazardous waste in labs is allowed only if approved by your campus Facilities Department or Office of Risk Management.

The following is a summary of LSCS recommendations for treatment of waste in laboratories:

  • The treatment occurs in a lab.
  • The purpose of the treatment is to minimize the generation of hazardous waste or enhance lab safety.
  • The quantity of hazardous waste and the treatment methods is in accordance with "Prudent Practices in the Laboratory 1995" (p. 160-171)*, National Research Council procedures, or other peer-reviewed scientific publications.
  • The quantity of waste treated in one batch should not exceed 5 gallons of liquid or 18 kilograms of solid or semi-solid.
  • The hazardous waste treated is from one experiment, or a set of experimental processes, and is of similar composition with no mixing of incompatible waste.
  • The person conducting the bench top treatment complies with all applicable requirements for management and disposal of the waste resulting from the treatment.
  • The person conducting the bench top treatment is one of the operators of the experimental process and is adequately trained in the treatment method, waste handling procedures.
  • The emergency procedures and documentation of any training is retained on file in the lab for three years.
  • The bench top treatment is conducted within ten (10) working days of completion of the laboratory process.
  • All residual hazardous waste is handled according to LSCS hazardous waste policy.
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