ABSTRACT
This chapter discusses the remedial investigation of contaminated soils and contaminated groundwater and the steps leading to the preparation of the remedial action work plan. There are several ways to delineate and interpret the horizontal and vertical extent of contaminated soils once contamination has been identified. The most straightforward way to delineate the extent of soil contamination is to surround, both horizontally and vertically, the known area of contamination with soil samples, which then are analyzed for the contaminants of concern. Compliance averaging is another method for delineating the extent of soil contamination. Field screening techniques can provide a quick assessment of the presence of contamination, especially when volatile organic compounds are the target of the investigation. For many remedial methods, quantitative physical data are needed for an effective remedial design. Borehole logging is an indirect, geophysical measuring method that also can provide quantitative soil and bedrock data.
