Methodology
| Step 1
|
Identify ship type and the multiplication factor for each component
using the IBC Code, the MEPC.2/Circular or the GESAMP Hazard
Profiles, and table 3 of this circular;
|
| Step 2
|
Determine the concentration of each component and multiply the
percentage by the factor identified in step 1;
|
| Step 3
|
Add
multiples together and determine the resulting ship type, using
table 4 of this circular; and
|
| Step 4
|
Apply
the previously determined pollution category of the mixture if the
sum of the multiples are < 100. If they are > 100, no further
action is required.
|
Example 1
Step 1
Component 1 is ship type 1, the multiplication factor is 1,000.
Component 2 is ship type 3, the multiplication factor is 10.
Component 3 is ship type 3, the multiplication factor is 10.
Step 2
| Component 1 is 11% of the
mixture.
|
|
The multiple is 11,000.
|
| Component 2 is 40 % of the
mixture.
|
|
The multiple is 400.
|
| Component 3 is 49% of the
mixture.
|
|
The multiple is 490.
|
Step 3
| Component number
|
Ship
type
|
Factor (f)
|
%
in
mixture
|
Multiples (f x %)
|
Pollution category of mixture
|
Resultant ship type
|
| 1
|
1
|
1,000
|
11
|
11,000
|
Step 4 Not applicable (Ss >100)
|
1
|
| 2
|
3
|
10
|
40
|
400
|
| 3
|
3
|
10
|
49
|
490
|
| Ss
|
11,890
|
Ss = multiple 1 + multiple 2 + multiple 3 = 11890
Referring to column 1 of table 4, Ss ≥ 10,000
In response to the associated question in column 2 of table 4 (reading across the
row), the sum of the ST 1 multiples is 11,000, i.e. ≥ 10,000, therefore the ship
type is 1.
Example 2
Step 1
Component 1 is ship type 2 and the multiplication factor is 100.
Component 2 is ship type 3 and the multiplication factor is 10.
Step 2
| Component 1 is 5% of the
mixture.
|
|
The multiple is 500.
|
| Component 2 is 95% of the
mixture.
|
|
The multiple is 950.
|
Step 3
Ss = Σ multiples = 1450
Referring to column 1 of table 4, 10,000 > Ss ≥ 1,000.
In response to the associated question in column 2 of table 4 (reading
across the row), the sum of the ST 1 & 2 multiples is 500, i.e. not ≥ 1,000,
therefore the ship type is 3. This is because there is no ST 1 value
component in the mixture in this case and therefore the sum of ST 1 (0) + ST 2 (500)
multiples = 500.
| Component number
|
Ship type
|
Factor (f)
|
%
|
Multiples (f x
%)
|
Pollution category of
mixture
|
Resultant ship type
|
| 1
|
2
|
100
|
5
|
500
|
Step 4 Not applicable (Ss >100)
|
3
|
| 2
|
3
|
10
|
95
|
950
|
| Ss
|
1,450
|
Example 3
Step 1
Component 1 is ship type "n/a", the multiplication factor is 0.
Component 2 is ship type 3, the multiplication factor is 10.
Component 3 is diluent mineral oil, the multiplication factor is 10.
Step 2
| Component 1 is 10% of the
mixture.
|
|
The multiple is 0.
|
| Component 2 is 8% of the
mixture.
|
|
The multiple is 80.
|
| Component 3 is 82% of the
mixture.
|
|
The multiple is 820.
|
Step 3
| Component
number
|
Ship type
|
Factor (f)
|
%
|
Multiples (f x
%)
|
Pollution category of
mixture
|
Resultant ship type
|
| 1
|
n/a
|
0
|
10
|
0
|
Step 4 Not applicable (Ss
>100)
|
3
|
| 2
|
3
|
10
|
8
|
80
|
| 3
|
Diluent mineral oil
|
10
|
82
|
820
|
| Ss
|
900
|
Ss = 900
Referring to column 1 of table 4, 1,000 >Ss ≥ 100.
Since there is no associated question in column 2 of table 4, the ship type is
3.
Example 4
Step 1
Component 1 is Ship type 2, the multiplication factor is 1,000
Component 2 is Ship type 3, the multiplication factor is 10
Component 3 is unassessed; the multiplication factor is 100
Step 2
| Component 1 is 4% of the
mixture.
|
|
The multiple is 400.
|
| Component 2 is 95 % of the
mixture.
|
|
The multiple is 950.
|
| Component 3 is 1 % of the
mixture.
|
|
The multiple is 100.
|
Step 3
| Component number
|
Ship type
|
Factor (f)
|
%
in
mixture
|
Multiples (f x %
)
|
Pollution category of
mixture
|
Resultant ship type
|
| 1
|
2
|
100
|
4
|
400
|
Step 4 Not applicable (Ss
>100)
|
3
|
| 2
|
3
|
10
|
95
|
950
|
| 3
|
Unassessed
|
100
|
1
|
100
|
| Ss
|
1,450
|
Ss = multiple 1 + multiple 2 + multiple 3 = 1,450
Referring to column 1 of table 4, Ss >1,000
In response to the associated question in column 2 of table 4 (reading
across the row), the sum of the ST 1 & 2 multiples is 400, i.e. < 1,000,
therefore the ship type is 3.
Example 5
Step 1
Component 1 is ship type "n/a", the multiplication factor is 0.
Component 2 is ship type 3, the multiplication factor is 10.
Component 3 is ship type 3, the multiplication factor is 10.
Step 2
| Component 1 is 91% of the
mixture.
|
|
The multiple is 0.
|
| Component 2 is 7% of the
mixture.
|
|
The multiple is 70.
|
| Component 3 is 2% of the
mixture.
|
|
The multiple is 20.
|
Step 3
| Component number
|
Ship type
|
Factor (f)
|
% in mixture
|
Multiples (f x
%)
|
Pollution category of
mixture
|
Resultant ship type
|
| 1
|
n/a
|
0
|
91
|
0
|
Y
|
3
|
| 2
|
3
|
10
|
7
|
70
|
| 3
|
3
|
10
|
2
|
20
|
| Ss
|
90
|
Ss = multiple 1 + multiple 2 + multiple 3 = 90
Referring to column 1 of table 4, Ss < 100
In response to the associated question in column 2 of table 4 (reading across the
row), is the PollutionCategory of the X or Y, therefore the ship type is
3.