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Hazardous waste segregation

Packaging instructions

(Refer to hazardous waste disposal poster which can be obtained by contacting Greg Friday at ext. 35755.)

  1. Do not mix waste. Use a separate container for each waste.
  2. All material must be placed in appropriated container (container material will not be degraded by contents).
  3. Five hazardous waste containers in a labThe following containers are available without charge from the Environmental Safety Facility (ESF):
    1. 20 L plastic drum (halogenated organic solvents)
    2. 20 L plastic drum (aqueous liquids)
    3. 20 L plastic drum (aqueous liquids)
    4. 4 L glass bottles
    5. 4 L plastic jugs
  4. Grey bio waste container with yellow lid and UWaterloo waste labelContainer must be sealed (leaking containers will not be accepted).
  5. Containers are to be labeled University of Waterloo (UW) waste label (available from ESF) and contents listed.
  6. Liquids containers should be only 80 % full.
  7. Store waste bottle in a secure area (not on floor).
  8. Unknown substances will be accepted (an account number is required for classification of unknown).

Waste segregation

Waste Description Examples
Solvents
Non-halogenated solvents Non halogenated solvents mixed with less than 20% water
  • Acetone
  • Alcohol
  • Hexane
  • THF
  • Acetonitrile
Halogenated solvents Halogenated solvents mixed with less than 20% water
  • Percholoroethylene
  • Methylene chloride
Sample vials
Halogenated

Organic compounds dissolved in halogenated solvents.

Specify solvent and class of compound
  • Pesticide samples dissolved in methylene chloride
Non-halogenated

Organic compounds dissolved in non-halogenated solvents.

Specify solvent and class of compound
  • Petroleum samples dissolved in toluene
Aqueous waste

Inorganic compounds dissolved in water.

Specify class of compound
 
Solid Organic compounds used for testing
  • Organic lab samples
Aqueous waste
Water contaminated with non-halogenated solvents Non-halogenated solvents mixed with more than 20% water
  • Groundwater contaminated with xylene
Water contaminated with halogenated solvents Halogenated solvents mixed with more than 20% water
  • Groundwater contaminated with chloroform
Heavy metals

Heavy metals dissolved in water.

Please specify pH

  • Solutions containing arsenic
Inorganic salts Inorganic salts dissolved in water.
  • Ferric chloride
  • Sodium sulfate solutions
Cyanides Solutions of cyanide compounds
  • Potassium ferro cyanide
Organic material  
  • Ethidium bromide
Oxidizers
   
  • Potassium nitrate
  • Hydrogen peroxide
  • Potassium permanganate
  • Bleach
Acids
Mineral acids NOTE: Be aware of what acids can be mixed. Piranha solutions (sulfuric acid/peroxide mix) as well as aqua regia (nitric acid/hydrochloric acid mix) are highly aggressive, off-gassing solutions. These cannot be brought to the ESF and need to be neutralized in house. They should be diluted (usually x 20) before neutralizing with calcium carbonate or another appropriate base.
  • Hydrochloric acid
  • Nitric acid
  • Sulfuric acid
  • Perchloric acid
Organic acids  
  • Formic acid
  • Acetic acid
  • Propionic acid
Bases
   
  • Sodium hydroxide
  • Potassium hydroxide
  • Ammonia
Metals
   
  • Mercury
  • Arsenic
  • Lead
  • Silver
Organic
   
  • formalin
Air reactive
  Material that produces flammable gases when mixed with water
  • Alkyl metals
  • Phosphorous
Water reactive
  Materials that produced flammable gases when mixed with water
  • Sodium
  • Lithium
Paints
Latex paints  
  • Paints or stains
Oil based or alkyd paints  
  • Paints or stains
Paint solvents  
  • Varsol
Monomers
  Un-linked monomers
  • Epoxy resin
Organic peroxides
   
  • Epoxy hardeners
Silica
  Silica only with minimal amounts of sand, no filter paper or resins
  • Alumina contaminated with acetone
Solid waste
Contaminated with organic compounds Solid material contaminated with organic compounds
  • Filter paper or alumina contaminated with solvents
  • Ethidium bromide gels
Contaminated with inorganic compounds Solid material contaminated with inorganic material
  • Filter paper contaminated with sodium sulfate
Bio-waste
Medical Solid material contaminated with blood or body fluids
  • Gauze pads
Sharps All material must be packed in sharps containers supplied by the ESF
  • Needles and syringes
Animal frozen

Pick up must be arranged one week in advance.

All material must be packed in bio-hazard containers supplied by the ESF.

 
Animal preserved

All formalin must be drained off.

All material must be packed in bio-hazard containers supplied by the ESF.

 
Radioactive waste
Liquid

Separated by isotope.

Only containers supplied by ESF will be accepted

Radiation field must not exceed 2.5 mR

  • P-32 solutions
Solid

Separated by isotope.

Only containers supplied by ESF will be accepted.

Radiation field must exceed 2.5 mR

  • C-14 waste
Liquid scintillation vials

Full LSC vials with any isotope.

Only containers supplied by ESF will be accepted.

  • Scintillation vials containing C-14 and H-3
Carbon nano-tubes
  In solution, the material should be labelled as such dry carbon nano-tubes or material that is contaminated with carbon nano-tubes should double-bagged and properly labelled (any additional contaminates should be included on the waste label)
  • Non-halogenate solvent (acetone) containing carbon nano-tubes
  • Pipettes and gloves contaminated with carbon nano-tubes