Introduction of Uncontaminated Fill Criteria
In order for a sample to be considered uncontaminated the Department of Water and Environmental Regulation requires both the total concentration and leaching tests to assess the quality of the fill material.
Table 7, The minimum sampling and testing standards for uncontaminated fill has been amended to allow for testing of substances based on land use history and statistical evaluation of the laboratory results. This includes a reference to the list of potentially contaminating activities, industries and land uses (Appendix B) of the Assessment and management of contaminated sites document (DER 2014). Therefore Appendix B is key to determining what tests are relevant from Table 6.
ALS has devised two new packages to assess the criteria laid out in Table 6. The P/19-4 package meets the requirements stipulated by the Maximum Concentration and the P/19-5 package meets the requirements of the Leaching test. These packages can only be used if testing for the entire suite of analysis. If selecting individual analytes please contact Client Services to receive a quotation to ensure the correct method is used to meet the required reporting limit. These packages can be seen in Table 1. ALS has also created two smaller packages P/19-4 Metals and P/19-5 Metals to compare samples against the metals and metalloids limits.
‘Clean fill’ is defined in the Waste Definitions to mean raw and excavated natural material such as clay, gravel, sand, soil or rock files that:
- has been excavated or removed from the earth in areas that have not been subject to potentially contaminating land uses including industrial, commercial, mining or agricultural activities; and
- has not been processed except for the purposes of achieving desired particle size distribution; and/or removing naturally occurring organic materials such as roots; and
- does not contain any acid sulphate soil; and
- does not contain any other type of waste.
WA Waste Classification Packages
Automated Comparison Reporting
Barton, C. (2018). Use of clean fill on development sites not subject to levy. Retrieved from http://hwlebsworth.com.au/use-of-clean-fill-on-development-sites-not-subject-to-levy/
Department of Water and Environmental Regulation (2018). Landfill Waste Classification and Waste Definitions 1996 (as amended 2018).
Department of Environmental Regualtion (2014). Assessment and management of contaminated sites