WAC testing overview
- What it is
- Waste Acceptance Criteria testing: sampling and lab analysis to show which landfill can accept the waste
- Analysis
- Leachate, heavy metals, sulphates, dissolved solids and hydrocarbons
- Results
- Typically 7 to 10 working days for a standard service
- Outcome
- Inert, non-hazardous or hazardous classification for landfill
- Not included
- Remediation design
Waste types we test
| WASTE TYPE | COMMON SOURCE | WHAT TESTING SHOWS |
|---|
| Natural soils | Excavations and groundworks | Whether it qualifies as inert |
| Made ground | Previous development, fill | Contaminants and landfill class |
| Demolition arisings | Concrete, brick, rubble | Inert or non-hazardous classification |
| Contaminated soil | Former industrial or fuel sites | Hazardous or non-hazardous route |
What WAC testing is
WAC stands for Waste Acceptance Criteria: the tests that show whether waste can legally go to a particular class of landfill (inert, non-hazardous or hazardous). We take representative samples and have them analysed by a UKAS-accredited laboratory for leachate, heavy metals, sulphates, dissolved solids and hydrocarbons. Standard results take 7 to 10 working days.
When WAC testing is needed
Contaminated or possibly contaminated soil
Made ground and demolition material
Industrial residues
Remediation waste
Hazardous or 'mirror entry' waste
ites with a history of industry, fuel storage, manufacturing or unknown fill usually need it before disposal, and landfill operators often ask for it.
How WAC testing works
Whether you have already taken a sample or need help with sampling, we can discuss your requirements and explain the next steps.
Step 1Tell us about your wasteLet us know what the waste is, where it came from and any information you have about potential contamination. This helps establish what testing may be needed.
Step 2Arrange your sampleYou may be able to provide your own sample, or we can discuss sampling support if needed. Contact us before taking or delivering a sample so we can advise on the requirements.
Step 3Laboratory testingYour sample is analysed for the relevant waste acceptance criteria. The tests required depend on the waste and the proposed disposal route.
Step 4ClassifyResults interpreted as inert, non-hazardous or hazardous.
Step 5ReportCertificates for the landfill operator and your records.
Samples must be representative of the waste being assessed. The number and size of samples, containers and any storage requirements can vary, so please speak to us before collecting or dropping off a sample.
Who uses it
Construction and groundworks contractors with excavation arisings
Environmental consultants running remediation projects
Developers discharging planning conditions
Industrial operators disposing of process residues
Why accurate testing matters
A misclassified load can be rejected at the gate, meaning standing time, double handling and extra transport, and can expose the producer to enforcement. Getting the classification right first time protects the programme, the budget and your compliance.
Landfill classes and what they accept
WAC results show which class of landfill can take the material.
| LANDFILL CLASS | ACCEPTS | COST AND CONDITIONS |
|---|
| Inert landfill | Material that will not react, such as clean soil and rubble | Lowest cost; strict limits |
| Non-hazardous landfill | Material that is not hazardous but not inert | Moderate cost |
| Hazardous landfill | Hazardous waste meeting hazardous WAC limits | Highest cost; may need treatment first |
Why choose Ideal Response for WAC testing
Trusted expertise
We coordinate sampling and laboratory analysis for all material types, ensuring results are accurate, defensible, and compliant with UK landfill acceptance criteria
Rapid turnaround:
WAC testing is often time-sensitive. We work efficiently to keep your project on schedule
Compliant & documented
Testing follows accredited procedures, with full reporting and certificates suitable for landfill operators, regulators, or project audits
Environmentally responsible
Sampling and testing processes are designed to be representative and support responsible disposal
Typical timescales
| Situation | Typical time on site |
|---|
| Standard results | 7 to 10 working days |
| Sampling visit | Half a day |
| Urgent turnaround | Speak to the team |
Every job is different; you get a timeline after the assessment. Standards we work to: Landfill (England and Wales) Regulations, Environment Agency waste acceptance guidance, UKAS
Where our work stops
We arrange WAC testing: help with sampling (or advice if you take your own sample), analysis by a UKAS-accredited laboratory, classification as inert, non-hazardous or hazardous, and certificates for the landfill operator. We do not carry out ground remediation design, structural repairs or drain repairs. If the material needs removing afterwards, see our hazardous waste disposal service.
How much does WAC testing cost?
WAC testing is priced by the number of samples and the analysis required.
| COST FACTOR | WHY IT MATTERS |
|---|
| Number of samples | Set by the volume and variety of material |
| Analysis suite | Standard WAC or additional contaminants |
| Turnaround | Standard 7 to 10 working days, or faster |
| Sampling visit | Location and access |
What happens when you contact us
Step 1Tell us about the spill or wasteWhat it is, roughly how much, where, and whether it has reached a drain or watercourse.
Step 2Response planThe team confirms when they can attend, the equipment needed and any permits.
Step 3Containment and clean-upWe contain, recover and treat the contamination, recording its condition before and after.
Step 4Waste and recordsContaminated material removed as a registered waste carrier, with waste transfer or consignment notes.
Tahlia Golding
Technical Account Manager
“A WAC test is only as useful as the sample it’s based on. Whether you’re bringing a sample to us or need support with sampling, it’s important that it represents the waste you plan to dispose of. Getting this right from the start helps you make informed decisions and avoid delays later in the process.”
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