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11. A cylinder should be considered empty when there is still a slight positive
pressure.
12. An empty cylinder should be returned to the supplier as soon as possible after
having been emptied or when it is no longer needed.
13. Cylinders should not be exposed to temperatures above 50 °C.
14. Store flammable gases separately from oxidizer gases.
4.9
Waste Disposal
Drew shall ensure that the disposal of laboratory chemicals is in compliance with
the procedures outlined in the Campus Wide Waste Management Plan available
from the CHO. To protect the environment, safety, and health of individuals at
Drew and in the surrounding community, hazardous waste must be disposed of
properly. Therefore, all laboratory personnel who generate or handle hazardous,
radioactive, regulated medical or mixed waste should be adequately trained. The
following disposal requirements must be enforced.
1. Do not pour hazardous or radioactive chemicals down a sanitary sewer.
Retention system drains may be used only when specifically approved for
such chemicals.
2. Place wastes in properly designated containers for disposal. All hazardous
waste must be removed from laboratories regularly by a licensed hazardous
waste disposal service.
3. Before leaving the laboratory, ensure that chemicals and wastes generated are
properly labeled, prepared for disposal, and/or assigned to someone who
understands how to manager such materials.
4.10
Chemical Spills
Call Campus Public Safety (Emergency X4444; Non-Emergency X3379) if the
following occurs:

An accident or spill involving hazardous materials results in a serious
injury.

Hazardous material is released into the sewer system.

The severity of an incident is unclear.
1. If the chemical involved in the spill is judged to present an immediate hazard,
evacuation is to be absolute, and the area should be isolated until a HAZMAT
team arrives. These instances would occur if:
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Revision #3 November, 2011