How Long Is a Phase I ESA Valid?

astm phase I environmental site assessment

Six months is the generally accepted answer that environmental engineers give when asked how long a Phase I Environmental Site Assessment (ESA) is valid. An ESA is usually good for 6 months as-is.  However, various factors may influence the need for a new assessment. From 6-12 months, an ESA should be updated wherever necessary.  After … Read more

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