Before wastes, contaminated soils, etc. can be removed for off-site disposal, they must be assessed to determine the nature and levels of chemical contaminants. The findings of the assessment are used to classify the wastes and determine the most suitable method for treatment and/or disposal. The assessment (waste classification) is also required by the landfill facility to determine whether it is licensed to accept that class of waste.
Tests are conducted to determine the total concentration of the contaminants and, where required, further testing (TCLP) is conducted to determine the leachability of the contaminants. This data is compared with State guidelines and legislative requirements to determine the waste classification.
For example, in the State of NSW, wastes are classified in accordance with the Department of Environment, Climate Change and Water (DECCW) “Waste Classification Guidelines. In summary, non-liquid wastes can be classified as Special, Hazardous, Restricted, General Solid (putrescible) or General Solid (non-putrescible), based on the total contractions and leachability of the contaminants.
Hibbs & Associates Pty Ltd use a combination of data from the laboratory analysis the waste materials, site characteristics and professional judgement to classify waste material under the least conservative waste classification group. This approach often results in substantial cost savings for our clients as well as significant environmental benefits by reducing the unnecessary consumption of specialised landfill space.
Hibbs & Associates Pty Ltd can provide assessments for Virgin Excavated Natural Material (VENM) as well as advise on those waste materials that are pre-classified’ and consequently do not require sampling and chemical assessment.
For further information regarding waste classification assessments, please contact:
Julie Porter 0447 128 680