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Phase I Environmental Site Assessment

Piper - Scent Dog


The purpose of a Phase I ESA is to identify Recognized Environmental Conditions (RECs) in connection with a property.

RECs are the presence or likely presence of any hazardous substances or petroleum products on a property under conditions that indicate an existing release, a past release, or a material threat of a release into structures on the property or the ground, groundwater, or surface water of the property. Aegis has developed a Phase I ESA protocol that satisfies the American Society for Testing Materials (ASTM) Standard Practice requirements for Phase I Environmental Site Assessments (E1527-13) and Environmental Protection.

Phase One Environmental Site Assessment

Agency (EPA) All Appropriate Inquiry (AAI) rules. Our Phase I ESA includes:

  • A physical inspection of the property and surrounding area.
  • A review of available property records and prior environmental reports.
  • Interviews with property owners or other key property managers.
  • A review of available regulatory files and records.
  • Preparation of a report detailing our findings.

We will provide a professional opinion regarding the potential for contamination. When RECs are identified, and additional investigations are warranted, a Phase II investigation is generally recommended. The Phase II investigation may require sampling and analysis to gather adequate information about the property’s specific environmental condition. If needed, we have the in-house expertise to deliver turn-key solutions that include investigation and remediation.

Comprehensive Environmental Due Diligence

This involves the aforementioned services and a comprehensive review of environmental compliance, including outstanding legal actions and enforcement actions by regulators. It also includes an environmental compliance audit.

FAQs About Phase One Site Investigation

What is the purpose of a phase one site investigation?
The purpose of a Phase I ESA is to identify Recognized Environmental Conditions (RECs) in connection with a property.

What classifies as a REC?
RECs are the presence or likely presence of any hazardous substances or petroleum products on a property under conditions that indicate an existing release, a past release, or a material threat of a release into structures on the property or the ground, groundwater, or surface water of the property.

What type of report will be generated as a result of an investigation?
Aegis has developed a Phase I ESA protocol that satisfies the American Society for Testing Materials (ASTM) Standard Practice requirements for Phase I Environmental Site Assessments (E1527-13) and Environmental Protection.

What happens if a REC is identified on the property?
We will provide a professional opinion regarding the potential for contamination. When RECs are identified, and additional investigations are warranted, a Phase II investigation is generally recommended. If needed, we have the in-house expertise to deliver turn-key solutions that include further investigation and remediation.

What is the cost?
There are several factors to consider when creating the cost estimate for a Phase I ESA. We will look at the location, previous history of contaminants, site location (if there are travel expenses that increases the price), the number of buildings that must be inspected, the size of the property, number of regulated facilities in the surrounding area, and the time it will take to look through all required documentation. If the subject property, or facilities with the ASTM search radius, have extensive regulatory compliance issues or releases, the more likely it is that it will take longer to review documents (as there are simply more.). The average cost of a Phase I Environmental Site Assessment is usually between $1,750.00 and $3,000 but can be more or less depending on different variables and specifics of the project.

How long does it take?
Generally, it takes 2 to 3 weeks to prepare a Phase I ESA. A Phase I report can be prepared in a shorter timeframe. However, the quicker the turn-around, the more likely there will be data gaps since not all information or data is readily available.

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Our Commitment To Our Clients

Throughout time many things change, one thing that remains consistent is our sincere dedication to our clients. You can trust Aegis for quality, dependable service that is done within the framework of good science. Our staff takes great pride in being service-orientated and going the extra mile to meet our clients’ expectations. Our professional staff will get the job done and work in a manner that will give you the peace of mind you deserve while taking care of your environmental needs.  
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