Chemical wastes generated in laboratories, academic photo labs, and art studios are required to be accumulated and disposed in accordance with Middlebury College’s Laboratory Management Plan.
All chemical wastes that are not approved for drain disposal must be accumulated in suitable waste containers. Here is a short summary of the required procedures:
- Affix or attach a Middlebury College Chemical Waste Tag to each container. Tags are available from Caitlin Carr in the Laboratory Stores. The following information must be entered on the tag before waste is placed in the container:
- The name and phone number of the person responsible for the material.
- The building and room number where the material is stored.
- A description of the type of waste to be placed in the container.
- The date that any waste was first placed in the container.
- As waste is added to the container, all of the chemical constituents must be listed on the Waste Tag. If practicable, an estimate of the proportion of each constituent as a percentage by volume or weight should also be included, particularly if constituents exceed 5% by volume or weight.
- Chemical waste containers must be kept closed except when waste is being added. Incompatible chemicals should not be placed into the same waste container, and, to reduce disposal costs, dissimilar waste types should not be mixed (e.g., metals with flammables).
- Notify the Laboratory Stores Manager when chemical waste containers are full and ready for pickup. The Laboratory Stores Manager will also collect waste containers at regular, predetermined intervals not to exceed six months.
Read the full Laboratory Management Plan.
Certain wastes must not be disposed in ordinary trash receptacles because they pose a potential hazard to personnel or the environment.
Infectious materials and contaminated liquids or solids must be treated before they are disposed. Most biohazardous wastes generated at Middlebury College can be decontaminated by steam autoclaving. Depending on the pathogen class as well as the density and total volume, certain biohazardous wastes may require shipment to a medical incinerator.
Biohazardous wastes must be accumulated in an appropriate autoclavable waste bag. To avoid confusion among waste handlers down the line, users should use only transparent bags for wastes that are to be treated on-site. Red or orange biohazard bags should be reserved only for wastes that are to be shipped to a medical incinerator.
After decontamination, autoclaved waste bags and waste containers need to be placed inside an opaque trash bag in the Processed Waste bin for disposal as ordinary waste. Before placing the containers in the outer opaque bag, any visible biohazard symbols should be removed or defaced. Building custodians have been instructed not to touch or empty any labeled biohazardous waste bags.
Please speak with Tim Allen regarding all accumulation and disposal of biohazardous wastes.
Broken Glass and Sharps
In order to prevent injury to the custodians, all broken glass and other sharps—including Pasteur pipets, pipettor tips, syringe needles, razor and scalpel blades, and similar objects—are to be disposed in specially marked boxes. Floor-standing and benchtop glass-disposal boxes are available from the custodians, and syringe disposal containers are available from the Laboratory Stores.
Uncontaminated sharps should be placed directly in one of the standard sharps disposal boxes. Sharps potentially contaminated with infectious agents—including any that have been exposed to human blood or blood products—must be segregated into their own clearly-marked sharps disposal boxes, and must be treated as a biohazardous waste, as described above, before final disposal.
Chemical wastes include potentially hazardous substances, as well as materials that are not regulated as hazardous wastes. Chemical wastes generated in laboratories, academic photo labs, and art studios are required to be accumulated and disposed in accordance with Middlebury College’s Laboratory Management Plan.
Certain wastes, such as dilute solutions of acids or bases, buffers, and the like, may be able to be disposed down the drain. By law, you must first confirm that such waste is suitable for drain disposal. For guidance in this area, speak with Caitlin Carr, Chemical Hygiene Officer.
All other wastes need to be accumulated for eventual disposal. Waste containers in labs and art studios must be marked with the College’s chemical waste tag listing the contents, generator information, and the date that any waste was first placed in the container. The containers themselves must remain closed at all times except when wastes are actually being added. Chemical waste tags are available from Caitlin.
When a waste container is ready for pickup, contact Caitlin after you have completely filled out the Chemical Waste Tag/s and associated Waste Collection Log. NEVER bring down or drop off any waste yourself!