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• Outside of the bottle is clean and dry.
• Chemical is returned to its proper location.
8. Close the flammables cabinet door.
9. Empty chemical containers should be placed in the designated bins located in the waste disposal room
W2312.
12.2 Local Collection of Liquid Hazardous waste
Waste that must be collected locally:
All waste that cannot be disposed to the drain must be collected locally. Such waste includes acids, HF, solvents,
and liquids containing metals or toxics. For a more detailed description, see section 5.4 of the laboratory Safety
Manual or the UCI or INRF websites. If you have any doubts about how to dispose of a chemical, consult with an
INRF staff member.
* Where liquid waste collect is done:
Local collection of chemical waste may be done only at the standard wet bench (see section 5.3 of the Laboratory
Safety Manual). You must be trained in the use of a standard wet bench you may use one.
* How to do liquid waste collection:
• Obtain a clean, empty waste container. (Do not use empty chemical containers, which have not been
decontaminated.) Clean, empty containers are stored in waste disposal room W2312. These containers
might be previously used for handling chemicals; however, they have been chemically decontaminated.
The chemical labels on these containers should be defaced; use a hazardous waste label and fill it out
place the label on the container. The clean containers that are supplied are made of polypropylene, which
is inert to most, but not all, chemicals used in the lab.
‣ If the chemical waste you plan to generate is not compatible to polypropylene (concentrated
nitric acid, for example), you should ask INRF/BiON staff for containers that are compatible
and if they are available before starting work.
‣ If you are working with multiple chemical mixtures, make sure to use separate containers for
collecting different types of waste (acid versus base, for example.) Mixing waste may lead to
unwanted side-reactions, including heat and explosion.
* Obtain a Blank hazardous waste disposal labels:
‣ Blank labels and clean bottle with vented caps, are available in the waste disposal room W2312. Fill out the
hazardous waste disposal label. Attach the label to the waste container (it can be tape to the container)
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