1. T-1070 CHEMICAL SEGREGATION
This work has been produced by DGL (Aust) Pty Ltd
This Learner’s Tool is about the skills and knowledge required for Segregating Chemicals DGL (Aust) facilities.

2. Dangerous Goods Logistics
What is Segregation
Definition of Segregation
To keep separated / Isolated by a distance.
Segregation device” means a device for segregating dangerous goods from incompatible goods, that:
Complies with the requirements in relation to devices used to segregate those goods set out in the “Specification for Segregation Devices” (Supplement 2); or
(b) Is approved by a Competent Authority as a segregation device for use in segregating the goods
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3. INCOMPATIBLE SUBSTANCES
Substances that have the ability to react or combine with one another in a way that:
increases the hazard of an individual substance
that could cause deterioration of any of those substances and increase the hazards they present
could increase the hazards in the event of fire.
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4. REACTION OF INCOMPATIBLE SUBSTANCES
Substances can react with one another in a manner that can create a hazard to people due to the reaction:
being violent
producing an explosion
producing a potentially explosive combination of products
producing fire or rapid evolution of heat
producing toxic vapour or toxic gas.
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5. SEGREGATION OF INCOMPATIBLE SUBSTANCES
Keeping incompatible substances segregated (or separated) ensures the safety of all persons. Required segregation distances are different for different types of incompatible substances.
ALWAYS comply with the type of DG allowed to be stored in a particular area BEFORE YOU APPLY the Storage Segregation Chart (T-220) to determine segregation needs.
DGL use a Storage Segregation Chart (T-220) and Oxidising Agents Segregation Chart (T-200) to assist operators in identifying incompatible substances and minimum required distances they are to be stored away from each other.
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6. SUBSIDIARY RISKS & SEGREGATION
If a packaged dangerous good has a Subsidiary Risk, greater care is required as to where it can be stored on site. Refer to your Supervisor for support in determining best location for the product.
If the Segregation Charts are not clear refer to your Supervisor for assistance.
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7. Dangerous Goods Logistics
ACIDS AND BASES
Some DG Class 8 substances are incompatible with one other.
DG Class 8 ACIDS are incompatible with DG Class 8 ALKALIS (or BASES).
Bunding ensures incompatible substances are not kept in the same compound, or in compounds that share a common drainage system.
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8. Dangerous Goods Logistics
ACIDS AND BASES
If a Class 8 substance cannot be stored in the dedicated store area for that class and substance type (acid or alkali), greater attention is required when placing the substance in an alternate storage location.
The same principles of substance type (acid and alkali) segregation still need to be followed, as well as segregation distance from other class types of dangerous goods (eg. Class 4).
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9. Dangerous Goods Logistics
ACIDS AND BASES
BASE
ACID
AFTER - excess heat, liquids splattered
BEFORE
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10. DAMAGED/ QUARANTINED STOCK
Contained damage and/or quarantined products should be stored in a ‘Damaged/Quarantine Bin’ located within the stock’s normal storage store. (For example; damaged class 4.2 product is contained in a recovery bag and stored in the Damaged/Quarantine Bin located within that Store.
Every product in the Damaged/ Quarantine Bin must be compatible. Separate bins must be set up for incompatible damaged/quarantined stock.
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11. DAMAGED/ QUARANTINED STOCK
This approach minimizes the risk of chemical reaction. When packaging is compromised, we have greater risk of chemical reaction so it makes good sense to treat segregation of damages/quarantined product with the same if not more care than non damaged product. Placing all classes of damages in a ‘damage product store’ is high risk.
Further, this approach ensure compliance with fire protection equipment requirements. For example, taking Class 3 damaged product out of the normal fire protection equipped store, and placing this product in a ‘damage product store’ would dramatically increase fire risks on site
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Dangerous Goods Logistics

12. DAMAGED/ QUARANTINED STOCK
Some sites have ‘Waste Bins’ used for disposal of damaged product. ONLY COMPATIBLE MATERIALS ARE TO BE PLACED IN THESE WASTE BINS. This may require the maintenance of a register to indicate exactly what product has gone into a bin to ensure non-compatible materials are never mixed.
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13. Dangerous Goods Logistics
WHAT’S THE DIFFERENCE BETWEEN COMBUSTIBLE MATERIALS AND CLASS 3 FLAMMABLE LIQUIDS?
Class 3 DG have flashpoints between -0 to 60ºC and their flashpoint is lower than their boiling point.
Combustible products have flashpoints above 60ºC and not like class 3 DG, their flashpoint is lower than their boiling point.
- C1: has flashpoint between 61ºC to 150ºC
- C2: has flashpoint above 150ºC
- CS: A solid that has a flashpoint/ will burn.
What’s a flash point?
The lowest temperature at which the vapour of a test portion will ignite when a test flame is applied.
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14. Dangerous Goods Logistics
WHAT’S THE DIFFERENCE BETWEEN COMBUSTIBLE MATERIALS AND CLASS 3 FLAMMABLE LIQUIDS?
Even though combustible products are not Class 3 DG, we still need to ensure we control and minimise the fire risks of storing combustibles with or near other Dangerous Goods.
The safest approach is to treat C1 as Class 3 DG for storage purposes (i.e store in the same area as Class 3 DG).
C2 and CS need to be segregated from other Dangerous Goods as per the Storage Segregation Chart (T-220). Generally, these products should not go into storage facilities where 5.1 and 5.2 products are present. Generally, these products need to be segregated by 3m from class 2s, 4.2s, 4.3s and 6.1s.
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15. SEGREGATION – STORAGE VS. TRANSPORT
Storage DG segregation requirements are very different to transport DG segregation requirements. (See Loading Compatibility Table and Storage Segregation Chart (T-220).
DGL Manager and Forklift Operator are responsible for ensuring compliance with DG segregation on a vehicle as is the Driver of that vehicle.
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16. Dangerous Goods Logistics
SEGREGATION DEVICES
Segregation Devices may be used to transport non-compatible products. Ensure diamonds are attached to both sides of segregation devices.
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17. Test your knowledge
Through the following slides you will be asked an number of questions to show that you have understood the content of this learning tool
Please record your answer on the training form F-260.
You will be required to submit the answers to the DGL HSEQ unit
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18. Dangerous Goods Logistics
Question 1
Substances that have the ability to react or combine with one another in a way that:
a) increases the hazard of an individual substance
b) that could cause deterioration of any of those substances and
increase
the hazards they present
c) could increase the hazards in the event of fire.
d) All of the above
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19. Dangerous Goods Logistics
Question 2
Do division 3 dangerous goods have flashpoints between -0 to 60ºC and their flashpoint is lower than their boiling point
a) yes
b) no
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20. Dangerous Goods Logistics
Question 3
Do C1 liquids have a flashpoint between 61ºC to 150ºC
a)yes
b) no
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21. Dangerous Goods Logistics
Question 4
What’s a flash point?
a) The lowest temperature at which the vapour of a test portion will ignite when a test flame is applied.
b) The lowest temperature at which the vapour of a test portion will boil when a test applied.
c) all of the above
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22. Dangerous Goods Logistics
Question 5
What is best to ensure incompatible substances are do not react with incompatible products
a) bunding
b) distance
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23. Additional information
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