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Management of Waste Containers

The integrity of waste containers shall be checked frequently.  Containers that are not in good conditions shall be transferred to stable containers.  If the transfer of the contents is not feasible, place the entire bottle and content in a larger container. 

Empty Containers

  1. When cleaning chemical residue from labware and reagent bottles, use the appropriate solvent, and collect all rinsate for waste disposal.  The organic rinsate can be consolidate into 5-gallon containers with other solvents.  Make sure there is less than 15% by mass water in the organic waste stream. 
  2. Aqueous rinsate waste can be consolidated with the laboratory solvents if they are compatible.   Do not collect oxidizer rinsate with organic waste.
  3. When triple rinsing use as little solvent as necessary to minimize the amount of waste being generated by this process.  As a rule of thumb, 25 ml should be sufficient.   Allow container to dry then dispose of them as ordinary refuse.
  4. Acid residues can be rinsed with water and poured through limestone before discharging down the sanitary drain.  Rinsate from chromic acid should not be poured down the drain but collected in glass bottles and disposed of as hazardous waste. 
  5. N.B. These empty containers will be removed by custodial services. 

New Waste containers

  1. Reusable 5-gallon waste containers are located in the closet next to Room 151 in the Chandler Building.  The closet is open during business hours so that laboratory may retrieve waste containers.  Chemical waste labels are also stored in the closet.

Laboratory clean out Procedures

  1. Upon termination of a research project or completion of a thesis, or the vacating of a laboratory space, the Chemistry department shall notify EH&S to arrange for the safe storage and disposal of the chemicals.  Once notification has been received, all chemicals within the laboratory or work area shall be removed.   Each investigator shall identify any waste material before his or her departure.  Unidentified materials will be treated as extremely hazardous.  Unidentified materials cannot be removed for disposal until it is properly classified. 
  2. In an effort to minimize the quantity and cost of waste generated by the University, other laboratories will be given an opportunity to procure much-needed chemicals for their use.  Chemicals left over will then be processed for disposal.  
  3. Work surfaces shall be decontaminated.  Once the space has been cleared for occupancy, the Safety officer will notify the chemistry Department.


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