A Phase II subsurface investigation should only be undertaken upon the successful completion and review of a comprehensive Phase I ESA or when contamination is known to exist and requires definition. The objective is to gather quantitative data to determine the extent of contamination or potential liability and project clean-up or remedial costs for the property.
In order to determine the presence or absence of contamination TORA professional staff of engineers can design and implement work plans according to ASTM E1903 – 11 tailored to the clients scope and needs.
TORA, Phase II Investigation may include the following:
■ Soil and groundwater sampling and laboratory analysis for potential contaminants of concern
■ Soil vapor laboratory analysis
■ Determination of groundwater flow direction and laboratory analysis
■ Drilling and sampling temporary bore holes
■ Installation and sampling monitoring wells
■ Geophysical surveys
■ Vapor encroachment assessment