What can I take

How much more of each substance the site could safely accept, and which tank it should go in.

Headroom is the room left before crossing into upper tier.

Gas oil (distillate marine diesel)752.7 t
Limited by tank spaceBest tank TK-104 (700 t)
How this was worked out
The tanks are physically full.
Physical capacity700 tThis one applies
TK-104 holds 900,000 kg of 1,600,000 kg working capacity.
Site asset register — declared working capacity
Aggregate threshold1,850 t
Environmental hazards (Section E) sum is at 0.926 of the upper tier threshold. Remaining fraction 0.074 × qualifying quantity 25,000 t = 1,850 t before the site reaches upper tier on this group.
COMAH 2015 Sch. 1 Pt. 3, Note 4 — summation rule; COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories
Segregationno limit
No compatibility rule is engaged by this substance in this zone.
No compatibility rule engaged
Toluene752.7 t
Limited by tank spaceBest tank TK-104 (700 t)
How this was worked out
The tanks are physically full.
Physical capacity700 tThis one applies
TK-104 holds 900,000 kg of 1,600,000 kg working capacity.
Site asset register — declared working capacity
Aggregate threshold7,450 t
Physical hazards (Section P + O) sum is at 0.851 of the upper tier threshold. Remaining fraction 0.149 × qualifying quantity 50,000 t = 7,450 t before the site reaches upper tier on this group.
COMAH 2015 Sch. 1 Pt. 3, Note 4 — summation rule; COMAH 2015 Sch. 1 Pt. 1, entry P5c
Segregationno limit
No compatibility rule is engaged by this substance in this zone.
No compatibility rule engaged
Methanol745 t
Limited by the COMAH thresholdBest tank TK-101 (580 t)
How this was worked out
Taking more would push the site over a COMAH threshold.
Physical capacity580 tThis one applies
TK-101 holds 620,000 kg of 1,200,000 kg working capacity.
Site asset register — declared working capacity
Aggregate threshold745 t
Physical hazards (Section P + O) sum is at 0.851 of the upper tier threshold. Remaining fraction 0.149 × qualifying quantity 5,000 t = 745 t before the site reaches upper tier on this group.
COMAH 2015 Sch. 1 Pt. 3, Note 4 — summation rule; COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories
Segregationno limit
No compatibility rule is engaged by this substance in this zone.
No compatibility rule engaged
Sodium hypochlorite solution 14%37 t
Limited by the COMAH thresholdBest tank VS-301 (37 t)
How this was worked out
Taking more would push the site over a COMAH threshold.
Aggregate threshold37 tThis one applies
Environmental hazards (Section E) sum is at 0.926 of the upper tier threshold. Remaining fraction 0.074 × qualifying quantity 500 t = 37 t before the site reaches upper tier on this group.
COMAH 2015 Sch. 1 Pt. 3, Note 4 — summation rule; COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories
Physical capacity40 t
VS-301 holds 20,000 kg of 60,000 kg working capacity.
Site asset register — declared working capacity
Segregationno limit
No compatibility rule is engaged by this substance in this zone.
No compatibility rule engaged
Dibenzoyl peroxide paste (Type C)29.8 t
Limited by the COMAH thresholdBest tank VS-301 (29.8 t)
How this was worked out
Taking more would push the site over a COMAH threshold.
Aggregate threshold29.8 tThis one applies
Physical hazards (Section P + O) sum is at 0.851 of the upper tier threshold. Remaining fraction 0.149 × qualifying quantity 200 t = 29.8 t before the site reaches upper tier on this group.
COMAH 2015 Sch. 1 Pt. 3, Note 4 — summation rule; COMAH 2015 Sch. 1 Pt. 1, entry P6b
Physical capacity40 t
VS-301 holds 20,000 kg of 60,000 kg working capacity.
Site asset register — declared working capacity
Segregationno limit
No compatibility rule is engaged by this substance in this zone.
No compatibility rule engaged
Hydrogen peroxide 60%29.8 t
Limited by the COMAH thresholdBest tank TK-201 (29.8 t)
How this was worked out
Taking more would push the site over a COMAH threshold.
Aggregate threshold29.8 tThis one applies
Physical hazards (Section P + O) sum is at 0.851 of the upper tier threshold. Remaining fraction 0.149 × qualifying quantity 200 t = 29.8 t before the site reaches upper tier on this group.
COMAH 2015 Sch. 1 Pt. 3, Note 4 — summation rule; COMAH 2015 Sch. 1 Pt. 1, entry P8
Physical capacity260 t
TK-201 holds 240,000 kg of 500,000 kg working capacity.
Site asset register — declared working capacity
Segregationno limit
No compatibility rule is engaged by this substance in this zone.
No compatibility rule engaged
Nitric acid 68%29.8 t
Limited by the COMAH thresholdBest tank VS-301 (29.8 t)
How this was worked out
Taking more would push the site over a COMAH threshold.
Aggregate threshold29.8 tThis one applies
Physical hazards (Section P + O) sum is at 0.851 of the upper tier threshold. Remaining fraction 0.149 × qualifying quantity 200 t = 29.8 t before the site reaches upper tier on this group.
COMAH 2015 Sch. 1 Pt. 3, Note 4 — summation rule; COMAH 2015 Sch. 1 Pt. 1, entry P8
Physical capacity40 t
VS-301 holds 20,000 kg of 60,000 kg working capacity.
Site asset register — declared working capacity
Segregationno limit
No compatibility rule is engaged by this substance in this zone.
No compatibility rule engaged
Propane (commercial LPG)29.8 t
Limited by the COMAH thresholdBest tank TK-201 (29.8 t)
How this was worked out
Taking more would push the site over a COMAH threshold.
Aggregate threshold29.8 tThis one applies
Physical hazards (Section P + O) sum is at 0.851 of the upper tier threshold. Remaining fraction 0.149 × qualifying quantity 200 t = 29.8 t before the site reaches upper tier on this group.
COMAH 2015 Sch. 1 Pt. 3, Note 4 — summation rule; COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories
Physical capacity260 t
TK-201 holds 240,000 kg of 500,000 kg working capacity.
Site asset register — declared working capacity
Segregationno limit
No compatibility rule is engaged by this substance in this zone.
No compatibility rule engaged
Ammonia, anhydrous14.8 t
Limited by the COMAH thresholdBest tank VS-302 (14.8 t)
How this was worked out
Taking more would push the site over a COMAH threshold.
Aggregate threshold14.8 tThis one applies
Environmental hazards (Section E) sum is at 0.926 of the upper tier threshold. Remaining fraction 0.074 × qualifying quantity 200 t = 14.8 t before the site reaches upper tier on this group.
COMAH 2015 Sch. 1 Pt. 3, Note 4 — summation rule; COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories
Physical capacity50 t
VS-302 holds 40,000 kg of 90,000 kg working capacity.
Site asset register — declared working capacity
Segregationno limit
No compatibility rule is engaged by this substance in this zone.
No compatibility rule engaged
Copper(II) sulphate solution 25%14.8 t
Limited by the COMAH thresholdBest tank TK-101 (14.8 t)
How this was worked out
Taking more would push the site over a COMAH threshold.
Aggregate threshold14.8 tThis one applies
Environmental hazards (Section E) sum is at 0.926 of the upper tier threshold. Remaining fraction 0.074 × qualifying quantity 200 t = 14.8 t before the site reaches upper tier on this group.
COMAH 2015 Sch. 1 Pt. 3, Note 4 — summation rule; COMAH 2015 Sch. 1 Pt. 1, entry E1
Physical capacity580 t
TK-101 holds 620,000 kg of 1,200,000 kg working capacity.
Site asset register — declared working capacity
Segregationno limit
No compatibility rule is engaged by this substance in this zone.
No compatibility rule engaged
Acrylonitrile3.4 t
Limited by tank spaceBest tank TK-101 (500 kg)
How this was worked out
The tanks are physically full.
Segregation500 kgThis one applies
SEG-07 Acute toxics separated from flammable liquids. Methanol is held in the same zone and separation cannot be demonstrated, so this substance is capped at the rule's 500 kg de minimis quantity.
HSG71 §Segregation of incompatible materials; COMAH SPC Technical Measures — segregation
Aggregate threshold14.8 t
Environmental hazards (Section E) sum is at 0.926 of the upper tier threshold. Remaining fraction 0.074 × qualifying quantity 200 t = 14.8 t before the site reaches upper tier on this group.
COMAH 2015 Sch. 1 Pt. 3, Note 4 — summation rule; COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories
Physical capacity580 t
TK-101 holds 620,000 kg of 1,200,000 kg working capacity.
Site asset register — declared working capacity