HAZARDOUS WASTE MANAGEMENT: EXAM QUESTIONS

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HAZARDOUS WASTE MANAGEMENT: EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -22 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: An umbrella policy:

Answer:

NEVER get rid of anything through the SINKNUMBER ONE RULE Question 2: Universal Wastes:

Answer:

• Rechargeable batteries2. Lamps3. Mercury contining devices:- start some container for these things-

have specific labeling for wastes- HAVE to write an accumulation start date- have one year limit to get it picked up- also pick up used oil with specific label Question 3: Common Examples of Corrosive Waste:

Answer:

• stock acid, base solutions- soil digestion waste- acid-bath glass cleaning wastes (concentrated

HNO3)- base-bath cleaning solutions (KOH/Alcohol mixtures) Question 4: Solvents which are NOT ignitable waste:

Answer:

• aqueous solutions (more than 50% water ) of ethanol and isopropanol in concentrations of < 24% by

volume are exempted from the definition of Hazardous Waste- allowed to go down the drain (for Walmart)-

Question 5: Common Examples of Ignitable Waste:

Answer:

• waste solvents (acetone,methanol, )-waste solvent rinsates- waste solutions containing solvents-

flammable gas cylinders,- waste rags contaminated with solvents/flammable liquids Question 6: F listed:

Answer:

(spent solvents/mixtures) --> liquids- methanol- toluene- methylene chloride Question 7: Accumulation Process:

Answer:

• designate the SAA ( satellite accumulation area)2. design a lab waste manager3. properly manage

containers- SAA must be at or near where you make the waste- keep a spill kit- have to have paperwork hanging in the lab- SAA must be segregated so that chemicals don't react- must add up to 100%- labels must name everything in bottle and no abbreviations (write WATER)- HAVE to be closed containers (No funnels left on them)

Question 8: If a chemical has an asterisk on it

Answer:

IT is super dangerous of them- we have to rinse the bottles three times and keep the rinse water too- called P list (acutely toxic) --> examples- sodium azide- acrolein- epinephrine

Question 9: 3. Reactive Waste

Answer:

• *RARE in lab- normally unstable and readily undergoes violent change without detonation- reacts

violently with water- when mixed with water, it generates flammable or toxic gases, vapors or fumes in a quantity sufficient to present danger to human health or the environment- cyanide or sulfide compounds- orange label with explosion means it is an explosive Question 10: Segregation of Chemicals:

Answer:

• Oxidizers away from Flammable Liquids2. Acids from Bases3. Reactives alone by themselves4.

Halogenated from Non-Halogenated5.Mercury alone6. Formalin/Formaldehyde all alone7. Chromerge8.Photographic waste9. waste oils10. Liquids from solids- corrosive wastes can't be in metal containers

Question 11: Identification of Hazardous Waste:

Answer:

is it ?1. Ignitable2. Corrosive3. Reactive4. Toxic

Question 12: When do Chemical wastes become hazardous wastes?

Answer:

• EPA listed hazardous waste- EPA characteristic waste- the material is known to be hazardous through

generator knowledge, MSDS info or other source

Question 13: what is also considered hazardous waste ...

Answer:

• discarded stock solutions (dilutions of these toxins)- solid waste contaminated by listed wastes ( clean

up kit/stuff, slides or gloves, containers)-

Question 14: 4. Toxic Waste (little skull label)

Answer:

• 8 heavy metals:( arsenic, lead, silver, mercury, barium, chromium, selenium, cadmium) ** most

common toxic waste in UF- 10 pesticides: 2,4-D, Toxaphene, lindane, chlordane- 22 organic chemicals

including: benzene, chloroform

Question 15: RCRA policy

Answer:

• craddle to grave policy for hazardous waste- EPA also got passed (federal level)- state legislature has

DEP- huge fines (can be up to 32,000) Question 16: Examples of Chemical Wastes:

Answer:

• used or spent chemicals (left over after research) --> can be liquid, solid or gas- chemicals that no

longer have any use- out of date or expired chemicals- spilled chemicals- chemicals abandoned by previous lab users- materials contaminated with chemical waste Question 17: U Listed:

Answer:

(toxic)- Phenol- Cresol- acrylamide

Question 18: 2. Corrosive Waste:

Answer:

• liquids with a pH <2 or pH>12.5 or a liquid comp able of corroding steel at a rate >6.35 mm/yr at 55

celsius- inorganic acids (Hydrofluoric acid, nitric acid,)- bases (- organic acids (acetic acid, lactic acid, formic acid) Question 19: Solid Waste falls into 3 categories:

Answer:

• uncontaminated waste2. solid biohazard waste3. solid chemical waste

Question 20: Three things in routine to be safe:

Answer:

• identify hazardous waste2. accumulate in satellite area3. dispose of waste properly

Question 21: Other Hazardous Waste:

Answer:

- corrosive solids: hydroxide compounds ex- Ethidium Bromide Waste

Question 22: 1. Ignitable Waste:

Answer:

• Liquids with constituents that have a flash point < 140 Fahrenheit --> (alcholols benzene, acetone)-

solids which may be easily ignited or may spontaneously combust under normal atmospheric conditions --> like activated charcoal, or metal powders- this is the red square on the pyramid- flammable compressed gas --> hydrogen, propane- oxidizers, and organic peroxides