Waste Classification for offsite disposal of soils is based upon establishing the physical and chemical properties of waste, the former mainly through observation and record keeping, the latter largely through sampling and analysis. These methods help to determine the relative total concentrations of potential substances/contaminants present within it and its likely origin – i.e. is it natural or manmade and what potential substances might be present based upon the site history and previous uses which provide an indicative guide for what types of waste might be anticipated.
The importance of sufficient ground investigation and informed assessment and evaluation at the ground investigation stage is the best means to mitigate this potential risk. High quality detailed soil descriptions and informed chemical testing are essential, allied to a well designed and targeted investigation to characterise the soils in question. The information gathered can then be evaluated to classify them for waste disposal purposes using HAZ-WASTE online and to determine if wastes can be minimised, segregated or reused.
This can commonly achieve meaningful cost savings particularly when undertaken as part of an integrated design approach using the CL:AIRE: Definition of Waste Code of Practice and T&P are highly skilled in this process reflecting the company’s blend of technical skill and contracting experience.