Filed under: Environment/Ecology, UK Government Information, Waste | Tags: Environmental, landfill, waste
The Environment Agency has published a guidance document entitled “Waste Sampling and Testing for Disposal to Landfill”. This document is designed to assist waste process operators on how to classify waste products which are intended for landfill, detailing how to apply Waste Acceptance Criteria (WAC) in assessing landfill-bound wastes. WAC limits cover:
- Total concentration limits for the organic components and pH; and
- Leachable components
Sampling plans should be prepared to comply with national and European standards (e.g. BS EN 14899:2005 Characterisation of waste – Sampling of waste materials – Framework for preparation of a sampling plan). Leaching tests must be carried out according to BS EN 12457-2:2002 “Characterisation of waste – Leaching – Compliance test for leaching of granular waste materials and sludges – Part 2 One stage batch test at a liquid to solid ratio of 10 l/kg for materials with high solid content and with particle size below 4mm (without or with size reduction).” Leaching tests are usually – but not always – carried out by an analytical laboratory.
The document gives a list of parameters which should be tested for, and their limits. Waste process operators would normally send samples and/or leachates to specialist laboratories to determine whether any of these contaminants are present and, if so, at what levels. It is expected that any laboratory carrying out such measurements would be accredited to ISO/IEC 17025 for the measurements concerned, use appropriate Certified Reference Materials (CRMs) and can demonstrate good performance in an appropriate proficiency testing (PT) scheme.
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