What is a Phase I Environmental Site Assessment?
A Phase I Environmental Site Assessment (Phase I ESA) is an investigation conducted to inspect & assess the environmental condition of a property. The Assessment goes through past and present property use and condition to discover any potential hazardous materials, asbestos, potential oil or gas leaks, etc. A Phase I ESA can be used to help investors of a property determine if the property they are about to purchase has environmental liabilities that could turn a potentially profitable property into a financial burden.
Why Do I Need a Phase I?
What Does a Phase I ESA Include specifically?
What Does a Typical Phase I ESA Cost?

A Phase II Environmental Site Assessment (Phase II ESA) evolves from the results of the Phase I ESA. The information compiled during a Phase I ESA is used to develop sampling and analysis programs for those potential environmental liabilities identified, and to help verify the existence, location, and extent of the problem. The extent of this verification process varies greatly and can be as simple as sampling an isolated contaminant, or as complex as a major site exploration to determine subsurface contamination. A detailed proposal outlining the extent of our Phase II ESA services is always provided by Integrity prior to the start of any activities.
What Does a Typical Phase II ESA Cost?
Environmental site assessments help determine whether a property is affected by contamination or potential environmental hazards. These assessments identify issues such as soil or groundwater pollution before property transactions or development begin. Conducting environmental site assessments ensures compliance with regulations, helps avoid future liabilities, and provides peace of mind for buyers, developers, and investors.
An environmental site assessment in Illinoishelps property owners and developers understand the environmental condition of their land before making major investments. It evaluates past and current land use, checks for contamination risks, and ensures compliance with Illinois environmental regulations. This proactive step protects both financial interests and public health, while also preventing future cleanup costs or legal complications.