Phase II, III ESA
When the findings of the Phase I ESA (Environmental Site Assessment) raise concerns over potential environmental contamination, a Phase II Limited Subsurface Investigation may be recommended. The purpose of the Phase II Environmental Site Assessment is to obtain definitive evidence of contamination through sampling and testing to define contaminant concentrations and estimate remediation costs.
Phase II / III Environmental Site Assessments typically involve the following steps:
Phase II ESA
When the findings of the Phase I ESA (Environmental Site Assessment) raise concerns over potential environmental contamination, a Phase II Limited Subsurface Investigation may be recommended. The purpose of the Phase II Environmental Site Assessment is to obtain definitive evidence of contamination through sampling and testing to define contaminant concentrations and estimate remediation costs. The following steps are typically involved:
- Testing – groundwater, soil vapor, and soil sample tests are performed to determine the existence of petroleum contamination; the presence of volatile organic such as dry cleaning solvents or heavy metal compounds; or toxic/hazardous waste characteristics.
- Evaluation – evaluate results from testing versus regulations and standards guidelines
- Report – detailed report of the methodology, findings and conclusions.
- Client Meeting – a face-to-face meeting to discuss and clarify key project findings and recommendations.
Phase III ESA
If the subsurface investigation performed during the Phase II ESA identifies the presence of contaminants in soil or groundwater above state action levels, a Phase III ESA can be performed to identify the lateral and vertical extent of affected soil and/or groundwater on the subject property.
The Phase III ESA is a comprehensive subsurface investigation that typically requires numerous soils borings and numerous samples collected compared to the Phase II ESA, which is a limited investigation with minimal soil borings and minimal samples collected.
Identifying the extent of chemical impacts is essential for evaluating cleanup options, estimating cleanup costs, and anticipating the timing required to obtain regulatory case closure (NFA or equivalent).
Performing a Phase III ESA is also useful tool to help establish whether chemical impacts identified in the Phase II ESA are minimal and can be easily resolved with minimal costs and timing or whether chemical impacts are extensive requiring substantial costs and a long-term effort.
Extensive Experience
EnviroPhase has extensive experience with conducting Phase II and III ESA’s and can help understand the options available to you.
- Flexible turnaround options to best accommodate deadline
- Minimally invasive and discrete testing, especially for currently operating businesses
- Consultative based approach with senior technical leadership to ensure a thorough understanding of our findings and options should further action be required