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Phase I Environmental Site Assessments (ESAs)

CAS & Associates, LLC (CAS), located in Boise Idaho, consists of an experienced staff of  a Professional Engineer and a Geologist with over 30 years of experience in preparing Phase I Environmental Site Assessments (ESAs) throughout Idaho. Our projects are very cost-effective because we are a small employee-owned company and we do not have the large overhead and expenses of a large company.

CAS prepares ESAs for real estate transactions, property development, bank financing, refinancing, foreclosures, and other in-house proactive audit programs within a 10 to 15 business day turnaround.

We not only serve our close neighbor clients in Meridian, Eagle, and Nampa but also other cities throughout the state of Idaho and adjacent States.

The purpose of a Phase I Environmental Site Assessment is to gather sufficient information to develop an independent professional opinion about the environmental condition of the property and to identify actual or potential environmental contamination. This may impact the property value or affect the claim to an “innocent landowner” exemption following the acquisition.


  In general, the scope of services for a

  Phase I ESA includes an evaluation of the following:

  • Physical characteristics of the Subject Property based on a review of referenced sources such as topographic maps and available geologic, soils, and hydrologic reports.


  • Information of properties, with the specified minimum search distances from the Subject Property, available in the agency databases and in local environmental records.


  • Current and past uses of on and off-site conditions and surrounding areas through an evaluation of historical sources such as aerial photographs, fire insurance maps, city directories, interviews, and prior reports.


  • Asbestos and lead-based paint containing materials screening, consisting of a review of available analytical data, the age of the improvements, dates of renovation, and other relevant information.


Here at CAS & Associates, LLC we have the available staff and experience to complete multi-site portfolios with very short due dates. We take pride in the fact that we can provide quality Phase I ESA reports for less cost than our competition.

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