4. Classes

Question 1

Waste control and WCR are similar except for:

Answer 1

WCR is missing radioactive materials, explosives and biomedical

Question 2

Waste classified based on…

Answer 2

Quantity (volume or mass) of hazardous waste

• Bulk greater than 5 kg or 5 L uses WCR
• Lab pack less than 5 kg or 5 L uses TDG

Question 3

2 Main Approaches to bulk classification based on:

Answer 3

• Type of Waste

- Criteria

Question 4

Type of waste classification based on:

Answer 4

• the chemical properties of a waste/chemical are known and it has already been classified
• no new testing required
• Listed in AUGWM

Question 5

Criteria for classifying waste

Answer 5

• waste that has not already been classified and is not listed in the Schedule
• Sample of the waste must therefore be tested and its properties compared to the list of properties of hazardous waste given in schedule 1
• if exceed any of these properties the waste is classified as hazardous waste

Question 6

Classes of waste

Answer 6

-Based on major hazardous property of the waste

Question 7

Divisions of waste

Answer 7

• classes are further subdivided based on the degree of hazard of the hazardous property
• increasing hazard (1 > 3) based on specific lab testing

Question 8

Packing Groups

Answer 8

• describe level of packing that must be used when a hazardous waste is transported
• 1 > 3 based on increasing hazard found in lab testing

Question 9

In cases of discrepancy beween TDG and WCR and AUGWM…

Answer 9

Use WCR

Question 10

Class 3 properties

Answer 10

• Flammable Liquids

- has a flash point < 60.5

Question 11

Flashpoint

Answer 11

Lowest Temperature at which a volatile liquid can vaporize to form an ignitable mixture in air
Requires an ignition source
Lower flashpoint = more dangerous chemcial

Question 12

Class 3 divisions

Answer 12

3. 1 flash point less than -18
4. 2 flash point between -18 and 23
5. 3 flash point between 23 and 60.5

Question 13

Class 3 packing groups

Answer 13

Based on initial boiling point

-lower BP = greater the hazard

Question 14

Flammable Solids properties

Answer 14

• it ignites and propagates combustion in a test sample
• only solids
• includes solids that spontaneously combust due to friction, adsorption of moisture or spontaneous chemical changes

Question 15

Class 4 divisons

Answer 15

4. 1 Flammable Solids: Readily combustible solids
5. 2 Pyrophoric Solids- spontaneously combust in air
6. 3 Substances that on contact with water will emit flammable gases

Question 16

Class 5 properties

Answer 16

• Oxidizing substances
• contributes oxygen for combustion at a rate that is equal to or greater than that provided by ammonium persulphate, potassium perchlorate or potassium bromate
• applies only to solids

Question 17

Class 5 divisions

Answer 17

5. 1 oxidizing substances- mainly inorganic
6. 2 mainly organics with O-O bond (thermally unstable)
   
   • burn rapidly, decompose explosively, sensitive to friction & impact

Question 18

Class 6 properties

Answer 18

• Toxic (poisonous) substances
• doesn’t include infectious substances from TDG
• if no data exists to show a substance is toxic you can assume it is not

Question 19

Class 6 Divisions

Answer 19

6.1 Toxic substances

Question 20

Class 8 properties

Answer 20

• corrosive
• has a pH value less than 2.0 or greater than 12.5
• applies to solids and liquids
• no divisions
• packing group based on visible necrosis of skin destruction over a period of time

Question 21

Class 9 properties

Answer 21

• Misc. Products and substances
• contains PCBs at concentration equal to or greater than 50 mg/kg
• includes dilutions

Question 22

Class 9 divisions

Answer 22

9. 1 PCBs or Articles containing PCBs
10. 2 Toxic Leachate
11. 3 Toxic Leachate, Dioxins and Furans

-all will fall into PG III unless otherwise specified