Compliance evidence record
generated 02 Sept 2026
1 — Establishment
- Establishment
- Immingham West Terminal
- Operator
- Northgate Bulk Storage Ltd
- Inventory snapshot
- 05 Aug 2026
- Storage zones
- 10
- Substance records
- 11
- Determined status
- Lower tier
Inventory is received as a daily snapshot file. No live process or tank-gauging integration contributes to the figures in this record. Every quantity below is the quantity declared in the snapshot named above.
2 — Aggregation by hazard category
For each hazard category the sum of (quantity held ÷ qualifying quantity) is taken across all substances classified in that category. Where the sum reaches 1.000 the establishment falls within scope at the corresponding tier.
COMAH 2015 Sch. 1 Pt. 3, Note 4 — summation rule
Health hazards (Section H)Σ 0.486 / 1.000upper tier basis
| Substance | Held | Qualifying qty | Fraction | Basis and citation |
|---|---|---|---|---|
| Ammonia, anhydrous | 40 t | 200 t | 0.200 | Named substance — Sch. 1 Pt. 2, entry 2 — Ammonia, anhydrous. Applied in the health sum because the substance is classified H2. COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories |
| Methanol | 980 t | 5,000 t | 0.196 | Named substance — Sch. 1 Pt. 2, entry 22 — Methanol. Applied in the health sum because the substance is classified H2, H3. COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories |
| Acrylonitrile | 18 t | 200 t | 0.090 | Named substance — Sch. 1 Pt. 2, entry 1 — Acrylonitrile. Applied in the health sum because the substance is classified H2. COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories |
Physical hazards (Section P + O)Σ 0.851 / 1.000upper tier basis
| Substance | Held | Qualifying qty | Fraction | Basis and citation |
|---|---|---|---|---|
| Ammonia, anhydrous | 40 t | 200 t | 0.200 | Named substance — Sch. 1 Pt. 2, entry 2 — Ammonia, anhydrous. Applied in the physical sum because the substance is classified P2. COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories |
| Methanol | 980 t | 5,000 t | 0.196 | Named substance — Sch. 1 Pt. 2, entry 22 — Methanol. Applied in the physical sum because the substance is classified P5c. COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories |
| Nitric acid 68% | 20 t | 200 t | 0.100 | Category P8 — OXIDISING LIQUIDS and SOLIDS — Category 1, 2 or 3. COMAH 2015 Sch. 1 Pt. 1, entry P8 |
| Propane (commercial LPG) | 20 t | 200 t | 0.100 | Named substance — Sch. 1 Pt. 2, entry 18 — Liquefied flammable gases, Category 1 or 2 (including LPG). Applied in the physical sum because the substance is classified P2. COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories |
| Acrylonitrile | 18 t | 200 t | 0.090 | Named substance — Sch. 1 Pt. 2, entry 1 — Acrylonitrile. Applied in the physical sum because the substance is classified P5c. COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories |
| Hydrogen peroxide 60% | 14 t | 200 t | 0.070 | Category P8 — OXIDISING LIQUIDS and SOLIDS — Category 1, 2 or 3. COMAH 2015 Sch. 1 Pt. 1, entry P8 |
| Gas oil (distillate marine diesel) | 900 t | 25,000 t | 0.036 | Named substance — Sch. 1 Pt. 2, entry 34(c) — Petroleum products and alternative fuels: gas oils. Applied in the physical sum because the substance is classified P5c. COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories |
| Dibenzoyl peroxide paste (Type C) | 6 t | 200 t | 0.030 | Category P6b — SELF-REACTIVE SUBSTANCES and ORGANIC PEROXIDES — Type C, D, E or F. COMAH 2015 Sch. 1 Pt. 1, entry P6b |
| Toluene | 1,450 t | 50,000 t | 0.029 | Category P5c — FLAMMABLE LIQUIDS — Category 2 or 3 not covered by P5a or P5b. COMAH 2015 Sch. 1 Pt. 1, entry P5c |
Environmental hazards (Section E)Σ 0.926 / 1.000upper tier basis
| Substance | Held | Qualifying qty | Fraction | Basis and citation |
|---|---|---|---|---|
| Sodium hypochlorite solution 14% | 240 t | 500 t | 0.480 | Named substance — Sch. 1 Pt. 2, entry 37 — Sodium hypochlorite mixtures classified Aquatic Acute 1. Applied in the environmental sum because the substance is classified E1. COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories |
| Ammonia, anhydrous | 40 t | 200 t | 0.200 | Named substance — Sch. 1 Pt. 2, entry 2 — Ammonia, anhydrous. Applied in the environmental sum because the substance is classified E1. COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories |
| Copper(II) sulphate solution 25% | 24 t | 200 t | 0.120 | Category E1 — HAZARDOUS TO THE AQUATIC ENVIRONMENT — Acute 1 or Chronic 1. COMAH 2015 Sch. 1 Pt. 1, entry E1 |
| Acrylonitrile | 18 t | 200 t | 0.090 | Named substance — Sch. 1 Pt. 2, entry 1 — Acrylonitrile. Applied in the environmental sum because the substance is classified E1. COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories |
| Gas oil (distillate marine diesel) | 900 t | 25,000 t | 0.036 | Named substance — Sch. 1 Pt. 2, entry 34(c) — Petroleum products and alternative fuels: gas oils. Applied in the environmental sum because the substance is classified E2. COMAH 2015 Sch. 1 Pt. 2 — named substances take precedence over Part 1 categories |
3 — Segregation
Every pair of substances held in the same zone, or in zones with a recorded separation, was tested against the compatibility rule set. 3 breaches and 1 marginal case were identified.
| Rule | Pair | Actual | Required | Citation |
|---|---|---|---|---|
| SEG-01Oxidising liquids/solids separated from flammable liquids | DS-401 Acrylonitrile DS-401 Hydrogen peroxide 60% | same zone Open ground | 5 m or Separate compartment | HSG71 §Segregation of incompatible materials, Table 2; CLP Annex I classes 2.13 / 2.6 |
| SEG-05Active-chlorine releasing substances separated from acids | TK-201 Sodium hypochlorite solution 14% TK-202 Nitric acid 68% | 6 m Independent bunding | 10 m or Separate compartment | HSG71 §Segregation of incompatible materials, Table 2; HSG95 §Hypochlorite storage |
| SEG-06Corrosive acids separated from corrosive alkalis | TK-201 Sodium hypochlorite solution 14% TK-202 Nitric acid 68% | 6 m Independent bunding | 10 m or Separate compartment | HSG71 §Segregation of incompatible materials, Table 2 |
| SEG-06Corrosive acids separated from corrosive alkalis | TK-202 Nitric acid 68% VS-302 Ammonia, anhydrous | 11 m Open ground | 10 m or Separate compartment | HSG71 §Segregation of incompatible materials, Table 2 |
4 — Remaining safe capacity
For each substance the maximum additional quantity acceptable across the establishment, with the constraint that binds first. Site totals are bounded by the aggregate threshold and, separately, by the sum of what each zone can physically and safely take.
| Substance | Storage classes | Held | Can accept | Binding constraint and citation |
|---|---|---|---|---|
| Acrylonitrile CAS 107-13-1 | Flammable liquid, Acute toxic, Aquatic hazard | 18,000 kg | 3.4 t | Physical capacity — Limited by the physical and segregation capacity of the zones, not by the aggregate threshold. Site asset register; compatibility rule set |
| Ammonia, anhydrous CAS 7664-41-7 | Flammable gas, Acute toxic, Corrosive alkali, Aquatic hazard | 40,000 kg | 14.8 t | Aggregate threshold — 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 |
| Copper(II) sulphate solution 25% CAS 7758-98-7 | Aquatic hazard | 24,000 kg | 14.8 t | Aggregate threshold — 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 |
| Dibenzoyl peroxide paste (Type C) CAS 94-36-0 | Organic peroxide | 6,000 kg | 29.8 t | Aggregate threshold — 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 |
| Gas oil (distillate marine diesel) CAS 68334-30-5 | Flammable liquid, Aquatic hazard | 900,000 kg | 752.7 t | Physical capacity — Limited by the physical and segregation capacity of the zones, not by the aggregate threshold. Site asset register; compatibility rule set |
| Hydrogen peroxide 60% CAS 7722-84-1 | Oxidiser | 14,000 kg | 29.8 t | Aggregate threshold — 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 |
| Methanol CAS 67-56-1 | Flammable liquid, Acute toxic | 980,000 kg | 745 t | Aggregate threshold — 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 |
| Nitric acid 68% CAS 7697-37-2 | Corrosive acid, Oxidiser | 20,000 kg | 29.8 t | Aggregate threshold — 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 |
| Propane (commercial LPG) CAS 74-98-6 | Flammable gas | 20,000 kg | 29.8 t | Aggregate threshold — 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 |
| Sodium hypochlorite solution 14% CAS 7681-52-9 | Active chlorine, Corrosive alkali, Aquatic hazard | 240,000 kg | 37 t | Aggregate threshold — 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 |
| Toluene CAS 108-88-3 | Flammable liquid | 1,450,000 kg | 752.7 t | Physical capacity — Limited by the physical and segregation capacity of the zones, not by the aggregate threshold. Site asset register; compatibility rule set |
5 — Method statement
- Qualifying quantities are taken from the rule tables held in the engine. Named substance entries take precedence over hazard category entries; where a substance falls in more than one category within a group, the lowest qualifying quantity is applied.
- Aggregation, segregation, headroom and intake decisions are computed by explicit arithmetic against those tables. Each output above carries the identifier of the rule that produced it.
- A language model is used in this system for one purpose only: extracting substance identity and hazard classification from uploaded safety data sheets, for review and confirmation by a competent person before the record enters the substance register. It computes no threshold, classification outcome or verdict.
- Substance records sourced from safety data sheet extraction are marked as such in the substance register and can be traced to the originating document.