Classes Of Hazardous Waste

Question 1

What are the differences between TDG classes and WCR classes

Answer 1

Class 1 (explosives) 
Class 6 (portion on infectious subs)
Class 7 (radioactive) 
Class 9 (portion on organisms)

All are gone

Question 2

What is WCR class 2

Answer 2

Gases

Question 3

What is WCR class 3

Answer 3

Flammable liquids

Question 4

What is WCR class 4

Answer 4

Flammable solids, subs liable to spont combustion, subs that when contact water emit flammable gases (water reactive substances)

Question 5

What is WCR class 5

Answer 5

Oxidizing subs

Question 6

What is WCR class 6

Answer 6

Toxic subs

Question 7

What is WCR class 8

Answer 7

Corrosives

Question 8

What is WCR class 9

Answer 8

Miscellaneous products and subs

Question 9

What separates bulk from lab pack?

Answer 9

Bulk is greater the 5kg or 5L

Question 10

2 main approaches for bulk classification

Answer 10

1. Type of waste

2. Criteria

Question 11

How do you bulk classify based on type of waste

Answer 11

-the chemical properties of a waste/chemical are known

• and it has already been classified
• no new testing required

-Found on AUGWM (T3, T4a and T4b)

Question 12

How do you classify bulk waste based on criteria

Answer 12

• waste has not been classified
• not listed in AUGWM
• waste much be tested
• then compared to properties given in schedule 1 section 1 of WCR

Question 13

What do classes divide waste by?

Answer 13

Major hazardous property

Question 14

What do divisions classify waste by

Answer 14

Degree if hazard

One is the most hazardous

Question 15

What are packing groups?

Answer 15

The level of packing that must be use when waste is transported

-packing group 1 is greatest hazard (written as Roman numerals)

Question 16

Flammable liquid criteria

Answer 16

Having a flash point less then or equal to 60.5 Celsius

Question 17

Define flashpoint

Answer 17

Lowest temp at which a volatile liquid can vaporize to form an ignitable mixture in air

Question 18

What is the criteria for 3.1

Answer 18

Flash point less then -18 (C)

Question 19

Criteria for 3.2

Answer 19

Flash point not less then -18 (C) but less the 23(c)

Question 20

Criteria for 3.3

Answer 20

Flash point not less then 23 but less the 60.5(c)

Question 21

Criteria for class 4

Answer 21

Ignited and propagates combustion in a test samples

• only solids
• solids that can combust due to friction, absorption of moisture or spont chem reaction

Question 22

Criteria for 4.1

Answer 22

Flammable solids

-readily combustible solids

Question 23

Criteria for 4.2

Answer 23

Pyrophoric solids

-spontaneous combustion in air

Question 24

Criteria for 4.3

Answer 24

Substances that on contact with water emit flammable gases

Question 25

What are packing groups for class 4 based on

Answer 25

Boiling point

Question 26

Class 5 criteria

Answer 26

It contributes oxygen for combustion at a rate that is equal to or greater then that provided by ammonium persulphate, potassium perchlorate or potassium bromate -liquids and solids

Question 27

Criteria for 5.1

Answer 27

Oxidizing subs -mainly Inorganics

Question 28

Criteria 5.2

Answer 28

Organic peroxides - mainly organics - have an o-o bond which is thermally unstable - can explosively decompose - sensitive to friction and impact

Question 29

Criteria for class 6

Answer 29

- has rat oral toxicity (LD50) not greater the 200mg/kg (solid) - 500 mg/kg. If liquid - dermal tox (LD50) not greater then 1000mg/kg - LC50 not greater then 10,000 mg/m^3 at 1atm

Question 30

Ways toxins enter system

Answer 30

1. Injection 2. Inhalation 3. Dermal

Question 31

LD50 = 0.3 mg/kg What do the mg and kg refer to

Answer 31

Mg - of toxin Kg- body weight of animal

Question 32

LC 50 = 2000mg/m^3 What does the mg and m^3 refer to?

Answer 32

Mg- toxin m^3 - of air

Question 33

If A has an LD50 of 5 and B has an LD50 of 15 which is more lethal

Answer 33

A

Question 34

Who deals with 6.2

Answer 34

(Infectious subs) AB health services

Question 35

If no information is given about backing group What packing group do you put it under

Answer 35

1 for safety

Question 36

If no toxicity data is unavailable do we assume it’s toxic

Answer 36

No

Question 37

Criteria for class 8

Answer 37

pH less then 2 or greater then 12.5

Question 38

Divisions in class 8

Answer 38

None

Question 39

Packing group criteria based on

Answer 39

Visible necrosis

Question 40

Class 9 criteria

Answer 40

-contains PCBs concentration of equal or greater then 50 mg/kg

Question 41

TCLP

Answer 41

Toxic characteristics leachate procedure

Question 42

Where do you find toxic leachates

Answer 42

Table 1 and 2

Question 43

What packing group is class 9 generally

Answer 43

3