CAS & Associates, LLC (CAS), is an employee-owned company, located in Boise Idaho, with a professional engineering staff with over 25 years of experience in the environmental field. We have completed hundreds of Phase I and II Environmental Site Assessments (ESAs) for commercial real estate firms, banks, private land, government agencies, and numerous private businesses not only in Boise but also throughout Idaho, Oregon, and Utah. We provide the best professional services, excellent environmental consulting, and engineering solutions to all of our clients.

We serve a wide variety of clients throughout the Pacific Northwest and Intermountain Regions. Since its inception, CAS has completed hundreds of Phase I and Phase II Environmental Site Assessments not only throughout the Boise / Treasure Valley area but also the entire state of Idaho. 

Our team of Engineers and Geologists are familiar with ASTM standard (E1527-13) and all US Environmental Protection Agency (EPA) requirements.  


CAS & Associates, LLC

2778 N. Lakeharbor Ln.

Boise, ID  83703



T: (208) 761-3001

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It’s each chemical makeup of the soil on which your property stands. For soil sampling