Initial Site Assessment
The Initial Site Assessment (ISA) phase of the investigation is used to evaluate the potential for environmental contamination at a proposed site. Utilizing the sites known uses, history, and neighboring property an evaluation is performed to determine the likelihood of encountering environmental contamination. If the ISA indicates that the site may have environmental contamination, or if state regulations mandate further investigation, the process is then taken to a Phase I Environmental Site Assessment.
Phase I Environmental Site Assessment
The primary purpose of the Phase I Environmental Site Assessment (ESA) is to evaluate the potential presence of contamination on-site. This is a non-intrusive investigation conducted to further determine the potential for any significant environmental impacts at the site by defining potential site-specific hazards. Typically, ESAs are performed prior to the acquisition of property to satisfy any due-diligence requirements, or prior to worker exposure at projects where existing contamination may be released. This phase does not involve the collection of any samples and is in essence, a “background” search of the property. ESI's Phase I Site Assessments are designed to meet the American Standard for Testing and Materials (ASTM) guidelines (ASTM E1527-97).
Phase II Environmental Investigation
Once the ESA is completed and the types of potential environmental hazards have been determined, a Phase II Environmental Assessment is initiated. In this phase of the investigation the full extent of contamination present at the site is defined. This involves the collection and analysis of samples from suspect areas on the property and may include soil, water, groundwater, and air samples. All Phase II Environmental Investigations are customized to fit the unique local soil type, gradient, and atmospheric conditions present at a particular site. This often includes the collection of surface soil samples, the advancement of soil borings, and the installation of groundwater monitoring wells to characterize surface and subsurface conditions at the site. ESI's Phase II Site Assessments are designed to meet ASTM guidelines (ASTM-1930-97).