Complete WAC Testing Service

ACS Environmental Testing offer an efficient and reliable WAC testing service. We use various test leaching procedures specified by the Environment Agency (BS EN 12457-2:2002, BS EN 12457-3:2002).

The leachate produced is analysed in accordance with strict procedures. The results from some of these tests can then be assessed in accordance with Waste Acceptance Criteria (WAC). This helps to determine the appropriate class of landfill to accept the waste.

The Landfill Directive (2010) says we must know everything about waste before sending it to a landfill. The introduction of the Waste Acceptance Criteria (WAC) ensures greater control of the waste disposed of at landfills. The focus is to minimise the impact of this form of disposal.

Clearing a large site

Why WAC Testing?

Landfill is the most cost-effective disposal route for waste.

WAC testing protects your consumers from contamination while enabling you to meet strict regulatory standards, enhance your company’s reputation, and save costs.

If waste doesn't meet the WAC criteria, it can be processed to reduce the costs of disposing hazardous waste.

WAC testing helps you:

  • Assess environmental controls and cleaning procedures to ensure effectiveness
  • Identify potential contamination risks before they become an issue
  • Enhance food safety and regulatory compliance
  • Improve customer confidence in product quality
  • Reduce the risks of costly recalls or penalties
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Types of WAC Tests

WAC tests come in three different types:

  • Inert (usually required)
  • Hazardous - Stable non-reactive
  • Hazardous

It’s important to note that a WAC test does not determine the hazardous properties of a specific matrix. It’s used to advise the landfill of where in the facility the waste may be placed. A WAC test is usually accompanied by other tests which are carried out on the solid portion of the sample.

Soil, Sludge & Solids Testing

We offer a suite of tests to analyse a wide range of soils, sludge, and solids, including:

  • Contaminated land analysis
  • Waste Acceptance Classification (WAC test)
  • Hazardous waste classification WM3
  • Topsoil analysis
  • PAS 100 Compost analysis
  • WAC analysis
  • HMRC LOI test

Waste Classification Reporting

ACS offers a complete hazardous waste classification service that meets Environment Agency WM3ver 1.2, alongside analytical and laboratory services.

The service provides a report on each tested parameter. It indicates if those parameters exceed the set limits. These limits determine if the sample is dangerous or not.

To ensure the safe classification of waste, it’s vital that testers know as much as possible about the site / sample.

This information should contain the following:

  • Details of the site
  • Historical uses of the site
  • Any known parameters
  • Safety data sheets (if available)

Providing this information ensures that the correct parameters are used for testing. It also ensures that the parameters are classified correctly according to the WM3.1 requirement.

Please note that we can also use third-party laboratory data to carry out this work.

Clearing away top soil

The following parameters are tested from the solid material:

  • Total Organic Carbon
  • Loss on Ignition
  • BTEX (Benzene, Toluene, Ethylbenzene & Xylene)
  • PCB (Polychlorinated Biphenyls) (7 x congeners)
  • Mineral Oil (TPH) (Total Petroleum Hydrocarbons)
  • Total PAH (Polyaromatic Hydrocarbons)
  • pH

Eluate Analysis – The following parameters are tested from the laboratory-prepared leachate:

  • pH
  • Conductivity
  • Metals
  • Anions
  • Total Dissolved Solids
  • Phenol Index
  • Dissolved Organic Carbon

Deviating Samples

ACS strictly complies with the requirements necessary to meet the United Kingdom Accreditation Service (UKAS) Policy on Deviating Samples (TPS 63).

In order to provide a high level of service to our clients, we provide free sample containers. This maintains sample integrity as much as possible after collection. The sample containers are selected specifically to ensure they are the most suitable for all our analyses.

Samples are defined as deviating when they do not meet specific criteria. In this instance, they may jeopardise the validity of the reported test result.

Examples of deviating samples include:

  • Incorrect sample container
  • Inappropriate storage temperature
  • Incorrect or lack of preservatives used for time-critical parameters
  • No time or date of sampling supplied
  • Analysis performed outside of quoted stability holding times

For more information regarding our Deviating samples procedure please see our downloads page.

A flooded trench

Frequently Asked Questions

Is WAC testing mandatory?

The Waste Acceptance Criteria (WAC) became mandatory in 2005 under the Landfill Regulations. WAC testing will analyse the leaching ability of contaminants in a material to identify how they are likely to act when in a landfill.

When do you need waste contamination testing?

Waste contamination testing, or WAC testing, is required following a waste classification test. The waste classification test will tell you what’s in the material (if it is hazardous or non-hazardous), and the WAC test will identify where it can go.

Who is responsible for WAC testing?

Landfill operators usually request a basic characterisation of any material being discarded, and it is the responsibility of business owners to ensure this is done correctly. First, you should attain your waste characterisation report, then organise WAC testing with a specialist company such as ACS to ensure your waste can be safely disposed of.

ACS Services

Please see below for a list of the services provided by ACS:

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Geo-Environmental Consultancy

The ACS Geo-Environmental Consultancy Department has been operating as part of ACS for over 10 years.

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On-Site Testing Services

ACS offers a comprehensive range of professional on-site testing, all carried out by our fully trained site technicians.

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Aggregates and Soils Testing

From our main laboratory in Poole, Dorset, ACS provide quality testing and material consultancy for the construction and civil engineering industry.

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Bituminous Testing

ACS carries out testing on new bituminous binder material and testing on hardened material for physical and chemical properties. Before the 1980s, Tar (which can cause cancer) was used as a binder. ACS staff can check materials to see if Tar was used.

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Concrete Testing

Concrete was the first service to be offered by ACS back in 1987. We now test fresh and hardened concrete using a variety of UKAS Accredited methods.

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Mortar and Screed Testing

ACS can sample and test new and hardened mortar. Hardened mortar for mix proportions and constituents, new mortar for compressive and flexural strength.

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Contamination and WAC Testing

At ACS, we provide a dependable chemical analysis service for waste soils and construction materials. We use different test solids and leaching procedures approved by the Environment Agency.

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Chemical Testing

The ACS chemical laboratory was established in 2007. It complements the physical materials testing service provided by ACS by offering a range of chemical analytical services.

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Leachate and Water Analysis

Our lab helps us analyse and monitor leachate and water samples, offering a comprehensive sampling and analysis service.

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Natural Stone Testing

Our newly refurbished stone testing laboratory has given us the opportunity to expand our testing scope. In addition, we have increased production and improved on our turnaround of samples.

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Site Laboratory Services

Over the last 35 years, ACS have supplied custom fitted site laboratories with technicians to many construction sites and projects worldwide.

Persistent Organic Pollutants

Our experienced lab technicians can provide detailed and accurate analysis of Persistent Organic Pollutants (POPs) in almost any sample matrix in line with the Stockholm Convention.

Energy From Waste

Energy from Waste experts, ACS, provide services such as gasification, pyrolysis, and analysis of IBA and APCr. They also offer sampling and interpretation of syngas and tar.

RoHS Compliance Testing

At ACS, we test your shredded waste to make sure it meets RoHS requirements by identifying and measuring contaminants.

Energy Supply, Generation & Regulation

Our expert team provides waste fuel testing services for RDF, SRF, MSW, and Solid Biomass. These services help you reduce costs and ensure compliance with regulations. This will give you peace of mind.


If you require a collection that is outside of our usual range, please feel free to call us on 01202 622858.
Or contact us and we will do our best to accommodate your requirements.