1. What Makes Spill Clean-Up Waste Hazardous?

Under the Hazardous Waste Regulations 2005 (England), waste is classified as hazardous if it contains or is contaminated with substances listed in the European Waste Catalogue (EWC) / UK List of Wastes that carry one or more hazardous properties. For spill response waste, the key properties triggering hazardous classification are:

• HP3 — Flammable: Absorbed fuels, solvents, or H224/H225 liquids render absorbent materials flammable
• HP6 — Acute Toxicity: Absorbents contaminated with toxic chemicals (acids, mercury compounds, pesticides)
• HP8 — Corrosive: Neutralised acid or alkali waste from spill clean-ups may remain corrosive
• HP14 — Ecotoxic: Hydrocarbon-contaminated absorbents, oily rags, and oil-soaked granules are typically HP14
• HP13 — Sensitising: Waste from isocyanate or resin spills

The critical practical point: even a small amount of contamination can render an entire batch of absorbents hazardous waste. A bag of polypropylene loose-fill absorbent that has soaked up 50ml of diesel cannot be disposed of in a general waste skip — it must enter the hazardous waste stream.

2. List of Wastes Codes for Common Spill Waste

The List of Wastes (England) Regulations 2005 assigns six-digit European Waste Catalogue codes to all waste types. The asterisk (*) suffix denotes hazardous waste. Correctly identifying the EWC code is mandatory for consignment notes and disposal facility acceptance.

When in doubt about the correct EWC code, the waste producer should obtain a waste classification from a competent person (WAMITAB-qualified, or a licensed laboratory analysis where chemical composition is uncertain).

3. The Hazardous Waste Regulations 2005 (England)

The Hazardous Waste (England and Wales) Regulations 2005 (SI 2005/894), as amended, implement the Hazardous Waste Directive (2008/98/EC) in English law. (Note: Scotland is governed by the Special Waste Amendment (Scotland) Regulations 2004; Wales by the Hazardous Waste (Wales) Regulations 2005.)

Key Legal Duties on Waste Producers

1. Duty of Care (Environmental Protection Act 1990, Section 34): Every person who produces, imports, carries, keeps, treats, or disposes of controlled waste has a duty to ensure it is managed without harm to human health or the environment.
2. Consignment Note Requirement: All movements of hazardous waste in England must be accompanied by a consignment note. This is a six-part form — failure to use it is a criminal offence punishable by an unlimited fine.
3. Prohibition on Mixing: Hazardous wastes with different EWC codes must not be mixed together, and hazardous waste must not be mixed with non-hazardous waste, unless the resulting mixture can still be correctly classified and safely managed.
4. Site Registration Obligation: Premises producing more than 500 kg of hazardous waste per year must be registered with the Environment Agency (see Section 5).

4. Consignment Note Process — Step by Step

The consignment note is the cornerstone of hazardous waste traceability in the UK. It must accompany every movement of hazardous waste from the premises of production to the licensed disposal facility. The standard form has six parts (A through F), each completed by a different party.

Part A — Consignment Details (Producer/Holder)

• Waste producer's name, address, and premises code (if registered)
• EWC code(s) for the waste
• Physical description of waste and quantity (in kg or litres)
• Container type and number of containers
• Process generating the waste (e.g., "spill clean-up from chemical storage area")

Part B — Carrier's Certificate (Producer's Declaration)

• Producer certifies the description is accurate and complete
• Signed and dated by an authorised person at the producing site

Part C — Carrier Schedule

• Details of the carrying vehicle and driver
• Carrier's waste carrier registration number (must be verified before signing)
• Date and time of collection

Part D — Carrier's Certificate

• Carrier confirms receipt of waste and accuracy of description
• Signed by the carrier's driver at point of collection

Part E — Receiving Site's Certificate

• Disposal facility confirms receipt, quantity as described, and acceptance for treatment/disposal
• Facility's waste management licence/permit number must be recorded

Part F — Disposal Record

• Completed by the disposal facility confirming the waste has been treated/disposed of in accordance with their permit
• A copy of Part F must be returned to the original waste producer and retained for a minimum of 3 years

Retention: Waste producers must retain copies of all consignment notes (all six parts that they handle) for a minimum of 3 years. Carriers retain for 3 years. Disposal facilities retain for 3 years (but EA may require longer for specific waste streams).

5. Site Registration with the Environment Agency

Under Regulation 23 of the Hazardous Waste Regulations 2005, premises in England that produce more than 500 kg of hazardous waste in any 12-month period must register those premises with the Environment Agency before any hazardous waste is removed from the site.

Registration Process

1. Complete the premises notification form (available via the EA's online waste service at wasteregistration.service.gov.uk)
2. Pay the registration fee of £18 per premises (fixed fee, as at 2024)
3. Receive a unique premises code (format: EA followed by 6 digits)
4. Quote this premises code on all consignment notes as the site identifier

Exemptions from Registration

Premises producing less than 500 kg of hazardous waste per year do not need to register but must still use consignment notes for all hazardous waste movements and must still comply with all other duties under the Regulations. In practice, any business conducting regular chemical spill clean-ups should assume registration is required.

6. Using Registered Waste Carriers

Under the Control of Pollution (Amendment) Act 1989 and the Waste (England and Wales) Regulations 2011, it is a criminal offence for an unregistered carrier to transport controlled (including hazardous) waste on public highways, and it is an offence for a waste producer to knowingly use an unregistered carrier.

How to Check Carrier Registration

1. Visit the Environment Agency's Public Register: environment.data.gov.uk/public-register/view/registered-waste-carriers-brokers
2. Search by company name or registration number
3. Verify the registration is current and covers hazardous waste (some carriers are registered for non-hazardous only)
4. Record the carrier registration number on the Part C of the consignment note
5. Keep a record of the search result — this provides a "due diligence" defence if the carrier subsequently acts illegally

Consequences of Using an Unregistered Carrier

• The waste producer commits a criminal offence under the Environmental Protection Act 1990 duty of care
• Fixed Penalty Notice of £300 (on-the-spot); prosecution can result in unlimited fines
• If the carrier fly-tips the waste, the producer may face civil liability for clean-up costs
• The waste may be returned to the producer at their expense

7. On-Site Storage Before Collection

Hazardous waste collected from spill clean-ups must be stored safely on site pending collection by a registered carrier. Storage duration and conditions are governed by waste management legislation and, where relevant, DSEAR (for flammable waste).

Container Requirements

• Containers must be UN-approved for the specific waste type — check the UN approval marking embossed on the container
• Containers must be in good condition — no cracks, missing bungs, damaged closures
• Liquid waste containers must have secondary containment (overpacks or bunded storage area)
• Containers must not be overfilled — maximum fill to 90% capacity to allow for thermal expansion

Labelling Requirements

Every container of hazardous waste in storage must carry a hazardous waste label containing:

• The words "Hazardous Waste"
• The EWC code of the waste
• The producer's name and address
• The date the waste was generated
• The hazardous properties (HP codes) if known

Maximum Storage Duration

• Hazardous waste may be stored on the premises where it was produced for up to 12 months without requiring a waste management permit (Regulation 17 exemption)
• Storage exceeding 12 months requires an environmental permit from the Environment Agency
• No more than 23,000 kg of hazardous waste may be stored on-site under the 12-month exemption
• Storage areas must be secure, covered, and on an impermeable surface with bunding where liquid waste is stored

8. Approved Disposal Routes

Hazardous waste must be disposed of at a facility licensed to accept that specific waste type. The choice of disposal route depends on the waste's chemical composition, physical state, and EWC classification. Key approved routes for spill clean-up waste include:

High-Temperature Incineration

The primary disposal route for contaminated absorbents, mixed chemical waste, halogenated solvents, and waste that cannot be recovered. Operating temperatures of 850°C minimum (1100°C for halogenated waste) destroy organic contaminants. Modern incinerators with energy recovery (ERF facilities) convert heat to electricity. Note: Not all incinerators are licensed for all waste types — verify acceptance criteria before despatch.

Physico-Chemical Treatment

For aqueous hazardous waste, emulsions, and some acidic/alkaline waste streams. Treatments include pH neutralisation, flocculation, precipitation of heavy metals, and oil/water separation. Treated water may then be discharged to sewer under a Trade Effluent Consent, or to controlled waters under an EA permit. The residual solid fraction becomes a filter cake which itself requires disposal as hazardous waste.

Solvent Recovery / Oil Re-Refining

Where waste solvents and oils are sufficiently pure, they can be regenerated and reused. Non-halogenated solvents (acetone, IPA, toluene) are commonly recovered; used oils can be re-refined to base oil specification. This is the preferred "highest in the waste hierarchy" option where technically feasible. Re-refining uses significantly less energy than crude oil refining.

Licensed Landfill

Since the EU Landfill Directive transposed into UK law in 2004, co-disposal of hazardous and non-hazardous waste in the same landfill cell has been banned. Hazardous waste may only be landfilled in cells specifically engineered and permitted for hazardous waste — these sites use double-lined cells with leachate collection systems. Liquid hazardous waste may not be sent to landfill. Landfill should be the last resort in the waste hierarchy; it is increasingly expensive and restricted.

9. Record Keeping Requirements

Adequate record keeping is not optional — it is a legal duty and the primary means by which the Environment Agency verifies compliance during inspections.

Consignment Note Records

• Retain all copies of consignment notes (all parts received) for minimum 3 years
• Records must be available for inspection by EA officers at any reasonable time
• Digital records are acceptable if they are tamper-evident and can be exported in full

Hazardous Waste Register

Registered premises must maintain a hazardous waste register containing:

• A record of all hazardous waste produced on site (date, type, quantity, EWC code)
• Reference to the consignment note for each movement off site
• Current on-site stock of hazardous waste awaiting collection

Waste Transfer Notes

For non-hazardous controlled waste, Waste Transfer Notes (WTNs) are required instead of consignment notes. WTNs must also be retained for 2 years (3 years is recommended for audit purposes).

For spill kits and absorbent supplies that help minimise the quantity of waste generated in the first place, see our spill kits collection and absorbent pads.

10. Frequently Asked Questions