Phase 2 Environmental Site Assessment
- RSB Environmental is the national leader in performing Phase II Environmental testing to help you meet the requirements of the TCEQ.
- Our staff are experienced with attributes particular to Texas including oil gas wells and state Petroleum Storage Tank (PST) regulations.
- Tailor fitted scope of work to each individual site and situation.
- RSB has conducted a thousands of Phase II ESA Projects nationwide to cover all major metros.
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RSB Environmental performs Phase II Environmental Testing either in support of a financing decision or to meet the requirements of the Texas Commission on Environmental Quality (TCEQ).
Most of our reports are performed to meet the standards set by ASTM E1903-97(2002). RSB Environmental staff are experienced with attributes particular to Texas including oil gas wells and state Petroleum Storage Tank (PST) regulations.
- Phase II ESA normally is performed when the Phase I ESA identifies Recognized Environmental Conditions (RECs) and/or recommends further investigation.
- The standard practice for Phase II ESAs is ASTM E1903-11.
- Unlike the Phase I ESA AAI rule, the Phase II is not a rule, but a standard of practice for performing the assessment.
- The standard of the Phase II ESA is typically defined by the scope proposed by the Environmental Professional and accepted by the client. This allows the scope of work to be tailored to each individual site and situation.
- Any additional testing or characterization should meet all state and local guidelines.
- Normally, a Phase II ESA is actually a screening to determine if potential contamination and/or hazardous materials are present. The Phase II does not typically characterize contamination present nor is it a feasibility study. However, this can be included as part of the Phase II ESA scope or may be part of the screening recommendations.
- Geophysical surveys are often included to help locate subsurface objects and/or identify suitable locations for soil borings and groundwater monitoring wells.
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Frequently Asked Questions
What is included in a Phase 2 environmental site assessment?
A typical Phase II ESA includes sampling of surface waters, groundwater, soils, and any potentially hazardous materials on or off the property. To determine the extent of contamination on the site, data from samplings is compiled, assessed, and evaluated.
The Phase II ESA process, which may include multiple field investigations and reports, aims to define the type, concentration, and size of the contamination, as well as the affected media. Additional research and analysis, such as on nearby receptor wells, may be required to help define the type and speed of cleanup required at the site. A typical Phase II includes drilling at the site, collecting water and soil samples from the surface and at depth, and analyzing the samples for a variety of contaminants.
What is the difference between a Phase I and Phase II environmental site assessment?
The primary distinction between Phase I and Phase II site assessments is in the assessment scopes of work. Through visual observations, historical use reviews, and regulatory records, a Phase I assesses the likelihood that a site is contaminated, whereas a Phase II assesses whether contamination is present.
Phase I Environmental Site Assessment
- Examine records to see if the site has ever been used for potentially hazardous purposes.
- Visual examination of the property’s current state, with reference to site plans.
- Visual examination of neighboring properties.
- Current property owners, operators, occupants, and local government officials were interviewed.
Phase II Environmental Site Assessment
- Soil and water samples are being collected to look for signs of contamination.
- Lab results are compared to local, state, and federal regulatory guidelines.
- Inspection of interior spaces for mold, radon, or lead paint may be included.
- Identification of wetlands, ecological resources, or endangered species that may preclude certain land uses is possible.
What triggers a Phase 2 ESA?
A Phase II ESA is a limited subsurface investigation performed when there is reason to believe there may be contamination on the site and you need to determine the likelihood of contamination. This usually means that a Recognized Environmental Condition (REC) was discovered during the Phase I ESA.
A Phase II ESA is thus performed when Phase I has raised the possibility of a problem with the site. The recommendation for a Phase II test does not imply contamination, which is the only reason to suspect its presence. It’s essentially a type of due diligence.
