Is METS an ex-situ or in-situ process?
METS is an ex-situ process — meaning that it works only with soil that has been excavated. This makes it possible for the soil to be deposited by a front-end loader into the METS processing equipment. Usually all of the contaminated soil is excavated and stockpiled on the site prior to beginning the treatment process. However, depending on time and site constraints, soil may be taken directly from excavation to the METS processing equipment. Also, on very large projects, it may be more efficient to excavate, stockpile and treat portions of the soil in phases.
