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Waste Classification Assessments


Managing soil on site can have significant implications on project design and budgetary requirements, with the potential to cause long delays to site work. It is important to understand the nature of the soil on site during the project development stage so that alternative management options can be designed in advance. Historically, excavating soil and disposing of it to landfill has been the preferred option. However, disposal to landfill is becoming an increasingly cost prohibitive practice and the least preferred management option of contaminated soil according to state environmental authorities, such as the EPA. Prensa can provide advice regarding alternatives to off-site disposal of soil such as managing the soil on site or treatment options.

Should off-site disposal still be required, Prensa can undertake the soil sampling in a timely manner and provide the relevant documentation required by landfills.  Soil is typically classified in accordance with relevant state EPA guidelines and can be classified in-situ using a variety of sampling methods. These include methods such as test pitting or the establishment of boreholes using drill rigs or hand sampling equipment. The alternative is to classify the soil ex-situ. This is typically done by collecting samples from a stockpile or number of stockpiles of soil that have been previously excavated.

The number of sampling locations or the sampling density is defined by state EPA guidelines. Once classified, the soil may be disposed, however, contaminated soil must be transported by a licensed vehicle to a landfill licensed to accept the waste type.