Neumann University - Chemical Hygiene Plan
APPENDIX V: HAZARDOUS WASTE POLICY
This policy describes guidelines for the identification, collection, storage and disposal of hazardous chemical waste. The guidelines apply to the chemical waste generated in the chemistry instructional labs but may also be applied to other generators of hazardous waste at Neumann such as the biology, art and photography faculty. They do not apply to radioactive, biohazards or infectious waste.
Hazardous wastes are regulated by the U.S. Environmental Protection Agency (EPA), the U.S. Department of Transportation and the Pennsylvania Department of Environmental Protection. The EPA enforces these regulations at academic institutions including those academic institutions that operate only instructional labs. Enforcement can be strict and very large fines can and have been assessed against academic institutions including small colleges and community colleges. Adherence to these guidelines can help assure that hazardous chemical wastes are properly identified, handled, and disposed of and that the laws are not violated.
A waste can be 1) a used, spent or abandoned material, 2) a material beyond its expiration date, 3) an empty chemical container
What is a Hazardous Waste?
Determining that a substance or mixture is hazardous is not always straightforward. If you are unsure it is better to be prudent and identify the material as hazardous. The MSDS of the material in question can be checked for guidance. The definition of hazardous materials below is a guideline and is not exhaustive.
The EPA defines a hazardous waste as one that meets any one of the following criteria.
1. Flammable. A material with a flashpoint less than or equal to 140oF(60oC).
2.Corrosive. A material with a pH less than 2.0 or greater than 12.5.
3.Reactive. A material that is unstable or prone to react violently under certain
conditions. These include materials that 1) are strong oxidizers, 2) react violently
with water, 3) can generate toxic gases or fumes when contacted with water , 4) are capable of detonation or explosion at standard conditions or when heated in a confined space.
4. Toxic. Specifically listed by the EPA as a toxic material. Many materials not listed by the EPA may be toxic. The National Institute of Occupational Health and Safety (NIOSH) defines as toxic any material that can exert an adverse chronic or acute health effect on the body when exposed. In general a material
with an acute oral LD50 less than 2500 mg/kg, acute dermal LD50 less than
4300mg/kg or an acute inhalation LD50 less than 10,000 ppm (gas) can be regarded as toxic or poisonous. Other materials that may pose risks include carcinogens, mutagens, and teratogens. A list of suspected carcinogens, mutagens and teratogens is available from the laboratory manager and at the web sites listed at the end of this document.
This is a list of chemicals that
fail the Toxicity Characteristic Leaching Procedure. A waste containing any of
these materials is a regulated EPA hazardous waste.
Arsenic 1,4-dichlorobenzene Methoxychlor
Barium 1,2-dichloroethane Methyl ethyl ketone
Benzene 1,1-dichloroethylene Pentachlorophenol
Cadmium 2,4-dinitrotoluene Pyridine
Carbon tetrachloride Endrin Selenium
Chlordane Heptachlor Silver
Chlorobenzene Hexachlorobenzene Tetrachloroethylene
Chloroform Hexachloroethane 2,4,5-trichlorophenol
Chromium Lead 2,4,6-trichlorophenol
Cresols,o, m, p Lindane 2,4,5-TP Silvex
2,4-D Mercury Vinyl chloride
How to Collect Hazardous Waste
Containers. Containers must be chemically compatible with the waste contents. Solid waste can go into glass or heavy gauge polyethylene bags. Liquid waste may go into glass or thick walled, chemically resistant PE or PP. Never place corrosive materials in metal cans. Never mix incompatible waste. All waste containers must be placed in trays large enough to contain all the waste. All containers must be tightly sealed with a screw cap. Corks or rubber stoppers are not acceptable.
Labels. Every waste container must have an attached label or preferably a tag. The tag must be labeled “Hazardous Waste” and contain the following information.
Contents: the full chemical name must be used. Formulas, abbreviations, trade
names or reagent names are not acceptable.
Amount: mass percent of each component, if a mixture, and total mass. Mass
percents must add to 100.
Category: identify the waste as toxic, reactive, corrosive or flammable. More than
one category may apply. In the case of particularly toxic or reactive materials additional cautionary information should be given.
Generator: name of the individual responsible for generating and completing the
Date: the date the container is filled or ready for pick-up.
Waste tags and labels are available from the lab manager.
When the collection process is completed the container should be placed in the area designated for hazardous waste storage. This area must be identified with sign stating “Caution: Hazardous Waste”. Containers must be tagged as described above and must be placed in tray with a volume sufficient to contain the waste. Incompatible materials must never be stored together.
Not all chemical waste is hazardous. A non-hazardous waste can be disposed using trash or drain.
Empty chemical containers can be put in the trash provided they contain no liquid or solid residue. Containers that once held hazardous material must be rinsed three times using a rinse volume of 10% of the container volume and the rinse collected as a hazardous waste.
Inorganics: sodium, potassium, calcium, magnesium and ammonium salts of sulfates, carbonates, oxides, chlorides and borates.
Lab materials not contaminated with hazardous chemicals: filter paper, glassware, absorbents, plastic or rubber protective gear.
Aqueous solutions of the organics and inorganics listed above can be disposed of in the sanitary drain. Additionally, soluble combinations of certain cations and anions may also be put down the drain. Quantities disposed of in this way should be kept small and be flushed with larger quantities of water.
aluminum acetate chloride
ammonium bicarbonate iodate
calcium bisulfite iodide
iron borate sulfate
lithium bromate sulfite
magnesium bromide thiocyanate
potassium carbonate thiosulfate
The laboratory manager has a file of carcinogens, mutagens and teratogens.
Web sites with more information.
1. NIOSH list of chemicals immediately Dangerous to Life or Health Concentrations.
2. OSHA List of Highly Hazardous Chemicals, Toxics and Reactives.
http://www.osha.gov/ (go to 1910.119 App A)
3. List of Known and Suspected Teratogens
4. List of Group 1 and 2A Carcinogens.
5. Partial List of Mutagens