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Conditionally Exempt Small Quantity Generators (CESQG)

Conditionally Exempt Small Quantity Generators (CESQG)

Businesses that generate a small volume of waste are known as Conditionally Exempt Small Quantity Generators (CESQG). CESQG waste is exempt from the disposal and processing requirements for hazardous waste generated in larger quantities if the waste generator meets certain conditions. The Texas Commission on Environmental Quality (TCEQ) has information on their web-site regarding CESQG waste.

Acutely Hazardous Waste (Federal Regulations)
Acutely hazardous wastes are listed as "P" wastes in the federal system. The main difference between P listed wastes and other federally regulated hazardous waste is the criteria used to identify acutely hazardous chemicals. The criteria:

  • Separates highly toxic (acutely hazardous) waste from other toxic wastes (U listed wastes)
  • Establishes the management method for containers that hold P listed wastes.

Extremely Hazardous Waste (TECQ Regulated)
Extremely or acutely hazardous wastes are a special category in the waste regulations. Federal regulations oversee the acutely hazardous wastes while the State of Texas TECQ oversees the extremely hazardous wastes. These wastes are more hazardous than ordinary hazardous wastes. Examples include contaminated needles, Extremely hazardous wastes are wastes meeting any of the following:

  • It has an acute oral LD50 less than or equal to 50 milligrams per kilograms; or
  • It has an acute dermal LD50 less than or equal to 43 milligrams per kilogram; or
  • It has an acute inhalation LC50 less than or equal to 100 parts per million as a gas or vapor; or
  • It has been shown through experience or testing that human exposure to the waste may likely result in death, disabling personal injury or serious illness because of the carcinogenicity, high acute or chronic toxicity, bioaccumulative properties, or persistence in the environment of the waste or material.

If a waste generator has an extremely or acutely hazardous waste, there is a limit to the amount that they can store in the lab at one time. One quart of extremely or acutely hazardous waste can be stored before disposal is required. When one quart or more of extremely or acutely hazardous waste accumulates, the waste must be disposed of within three days of reaching that point. If less than one quart, you have 90 days to accumulate the waste
It is suggested that if you are accumulating a waste that falls into this category, you should dispose of it before it reaches the one quart limit. This way you will not have to be restricted by the three day maximum time limit.
For additional information on CESQG contact your campus Facilities Department or LSCS OEM.

Responsibilities of Hazardous Waste Generators
Each laboratory person handling hazardous chemicals is responsible for the proper accumulation and management of waste in the laboratory.

Laboratory personnel are responsible for the:

  • Labeling of hazardous waste.
  • Proper storage of hazardous waste.
  • Transportation of waste to a pick-up location or scheduling a special pick-up.
  • Scheduling lab cleanouts as required.
  • The lab manager is responsible for coordinating the disposal of all chemicals from their laboratories prior to closing down laboratory operations.
  • Providing training of laboratory personnel in hazardous waste management.

The Facilities Department is responsible for:

  • Collecting waste at scheduled pick-ups or by appointment.
  • Conducting lab clean-outs.
  • Storage and packaging waste for shipment off-campus.
  • Training its personnel in hazardous waste management.

The Office of Emergency Management and the Risk Management Departments are responsible for:

  • Providing guidance in hazardous waste management.

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