Annex 9 Examples of the calculation method
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Statutory Documents - IMO Publications and Documents - Guidelines - Guidelines for the Provisional Assessment of Liquids Transported in BulkMEPC/Circular.265 - Annex 9 Examples of the calculation method

Annex 9 Examples of the calculation method

  Examples of using flow chart for determining pollution category in the provisional assessment of noxious liquid substances carried in bulk

Component Amount(%) Pollution category Factor (Fp) % × Fp
Component 1 0.5 Afootnote 1,000 500
Component 2 29.5 A 1,000 29.500
Component 3 70.0 B 100 7,000
        Sp = 37,000
Sp ≥ 10,000
Is the total amount of Afootnote ≥ 1%? → No
Is the sum of category A multiples more than or equal to 10,000? → Yes (it is 30,000).
The mixture is therefore pollution category A.
Component Amount(%) Pollution category Factor (Fp) % × Fp
Component 1 0.5 Afootnote 1,000 500
Component 2 8.0 A 1,000 8,000
Component 3 91.5 B 100 9,150
        Sp = 17,650
Sp ≥ 10,000
Is the total amount of Afootnote ≥ 1%? → No
Is the sum of category A multiples more than 10,000? → No (it is 8,500).
The mixture is therefore pollution category B.
Component Amount(%) Pollution category Factor (Fp) % × Fp
Component 1 3 Afootnote 1,000 3,000
Component 2 12 B 100 1,200
Component 3 85 III 0 0
        Sp = 4,200
10,000 > Sp ≥ 1,000
Is the total amount of Afootnote ≥ 1%? → Yes
The mixture is therefore pollution category A.
Component Amount(%) Pollution category Factor (Fp) % × Fp
[Zinc alkyl dithiophosphate (C3 - C14)] 15 B 100 1,500
Diluent mineral oil 11 – 10 110
Calcium long chain alkyl salicylate (C13+) 35 C 10 350
Polyolefin amide 39 D 1 39
        Sp = 1,999
10,000 > Sp ≥ 1,000
Is the total amount of Afootnote ≥ 1%? → No
Is the sum of category A and category B multiples more than or equal to 1,000? → Yes (it is 1,500).
The mixture is therefore pollution category B.
As this mixture is a lube oil additive the diluent mineral oil has a factor of 10.
Component Amount(%) Pollution category Factor (Fp) % × Fp
Ethyl benzene 7 B 100 700
Toluene 15 C 10 150
Ethyl alcohol 78 III 0 0
        Sp = 850
1,000 > Sp ≥ 100
Is the sum of categories A, B and C multiples more than or equal to 100? → Yes (it is 850).
The mixture is therefore pollution category C.
Component Amount(%) Pollution category Factor (Fp) % × Fp
n-Octanol 5 C 10 50
Ethyl acetate 40 D 1 40
Ethyl alcohol 55 III 0 0
        Sp = 90
100 > Sp ≥ 10
The mixture is therefore pollution category D.
Component Amount(%) Pollution category Factor (Fp) % × Fp
Butylene glycol 8 D 1 8
Ethyl alcohol 92 III 0 0
        Sp = 8
10 > Sp
The mixture is therefore a “non-pollutant”.

 Some products are included in the IBC code as solutions. The following are examples of mixture calculations involving such products. If the product is described in the Code as solution with no reference to percentage, then for calculation purposes the concentration of the pure product should be used;

    Pollution category
For example: Aluminium sulphate solution D
  Sulphuric acid C
mixture containing:
1. 80% of a 25% solution of Aluminium sulphate
2. 20% Sulphuric acid
should be regarded as:
  20% Aluminium solphate D
  20% Sulphuric acid C
  60% Water III

 If the product is described in the Code as “solution” qualified by a concentration (e.g. 45% or less), then the mixture should be adjustedto describe it in terms of that component being at the maximum concentration described in the Code:

    Pollution category
For example: Dimethylamine solution (45% or less) C
  Dimethylethanolamine D
mixture containing:
1. 25% of a 45% Dimethylamine solution
2. 75% of Dimethylethanolamine
should be regarded as:
1. 25% Dimethylamine solution (45%) C
2. 75% of Dimethylethanolamine D

  Examples of using flow chart for ship type in the provisional assessment of noxious liquid substances carried in bulk

Component Amount(%) Ship Type Factor (Fs) % × Fs
1,2,4–Trichlorobenzene 22 2 10 220
1,1–Dichloroethane 78 3 1 78
      Ss 298
1,000 > Ss ≥ 100
Is the sum of ship type 1 and ship type 2 multiples more than 100? → Yes (it is 220).
The mixture should therefor be shipped in a type 2 ship.
Component Amount(%) Ship Type Factor (Fs) % × Fs
1-Octene 0.5 3 1 0.5
1-Pentene 7 3 1 7
Ethyl alcohol 92.5 - 0 0
      Ss 7.5
10 colsep="0" rowsep="0" > Ss
Is the mixture pollution category A, B or C - ?
To give an answer to that question first calculate the pollution category of the mixture.
Component Amount(%) Pollution category Factor (Fp) % × Fp
1-Octene 0.5 B 100 50
1-Pentene 7 C 10 70
Ethyl alcohol 92.5 III 0 0
      Sp 120
1,000 > Sp ≥ 100
Is the sum of categories A, B and C multiples more than or equal to 100? - Yes (it is 120).
The mixture is therefore pollution category C.
The answer to the question “Is the mixture pollution category A, B or C?” is yes.
The mixture should therefore be shipped in a type 3 ship.
Parent topic: Guidelines for the Provisional Assessment of Liquids Transported in Bulk MEPC/Circular.265
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