- Facilities Services Home
- EH&S Training & Services
- Occupational Health & Safety
- Research Safety
Hazardous Waste Reduction
Safety Instruction Number:9
Last Update:Tue, 07/14/2009
- Cost to dispose of hazardous chemical waste may exceed the original purchase cost
- EH&S encourages generators to reduce waste whenever possible
Specific Reduction Ideas
- Difficult to handle and very expensive to dispose
- Prevent by keeping good records and labeling.
- Responsible departments must make a good faith effort to identify the material.
- Responsible departments may be asked to pay for the cost of identification or classification required for disposal of unknowns.
Flammable organic solvents
- Combined by EH&S and reused for off-site fuel or solvent recovery
- Small volumes will be collected.
- Mixing organic solvents with other chemicals will make them unsuitable for heat recovery; costs will increase.
- "Other chemicals" include halogenated solvents, acutely toxic flammables, acids, bases, heavy metals, oxidizers, and pesticides.
- Separate from other liquids for solvent recovery.
- Flammable orgainc solvents mixed with halogenated solvents should be treated as halogenated waste solvent.
- Appropriate if material is in unopened containers or partially used original containers and of high quality.
- Be careful not to obliterate labels or any parts of labels.
- Materials are made available to interested parties at OSU.
- Research chemicals should not be given or sold to the general public or offered as surplus property.
- Commercial chemical products may be surplused if reasonable cautions are followed; contact EH&S for details.
- Performed on wastes which are hazardous ONLY because of corrosive properties (acids, bases).
- Neutralized solution should have a final pH value between 6 and 9.
- Corrosive wastes outside those pH limits should not be discharged through the sewer system.
- EH&S may be able to provide generators with appropriate neutralization materials.
- Buy chemicals in an amount that matches anticipated needs
- Substantial portion of chemical waste at OSU is still chemicals in original containers
- Savings from purchasing chemicals in larger sizes offset by disposal costs for unused portions
- Watch chemical shelf life when buying
- It's not always possible to determine future needs, but think about it when ordering.
- Modify procedures which use hazardous substances to lessen the hazard or amount of waste products
- A less hazardous material can be substituted and perform as well
- Substitute the commercial oxidizing compound NOCHROMIX in place of chromic acid in making an oxidizing acid cleaning solution
- Resulting mixture is still hazardous because of its corrosive properties, but is not toxic.
- It can be neutralized
- Reactive substances--those that react with water or air or are inherently unstable--are especially troublesome disposal items.
- Disposal costs for picric acid can be as much as ten times the original purchase price.
- Minimize purchases, change procedures, use entire stocks, and regularly monitor inventory of such compounds
- Collect solids in disposable, non-leaking containers, labeled with contents, clearly marked as non-hazardous
- EH&S will accept any well identified non-hazardous waste and take care of it
- It can alternatively be placed in the campus garbage collection system.
- Small volumes of solutions containing only non- hazardous, water miscible liquid materials can be disposed through the sewer system
- Remember that "hazardous" includes flammable liquids even if they are water soluble
- If questions arise as to a specific chemical's hazard status, contact EH&S
The items listed below are considered NON hazardous
NON-Hazardous Organic Chemicals
- Acetates: Ca, K, Na, K, Mg, NH4, Ca
- Naturally occurring amino acids and salts
- Citric acid and salts of Na, K, Mg, NH4, Ca
- Lactic acid and salts of Na, K, Mg, NH4, Ca
- Sugars and sugar alcohols
NON-Hazardous Inorganic Chemicals
- Bicarbonates: Na, K
- Borates: Na, K, Mg, Ca
- Bromides: Na, K, Ammonium
- Carbonates: Na, K, Mg, Ca, Ammonium
- Chlorides: Na, K, Mg, Ca, Ammonium
- Iodides: Na, K, Ca
- Oxides: B, Mg, Ca, Al, Si, Fe, Zn
- Phosphates: Na, K, Mg, Ca, Ammonium
- Silicates: Na, K, Mg, Ca
- Sulfates: Na, K, Mg, Ca, Ammonium