As an alternative to Phase I Environmental Site Assessments Environmental Transaction Screenings (ETSs) are sufficient in certain cases such as low risk properties where a limited environmental due diligence is required to identify potential environmental concerns in commercial real estate transactions.
They include most of the scope of work of a Phase I ESA such as a site inspection, review of environmental databases, completion of an environmental questionnaire by the owner or occupant and consultant doing the transaction screen, and review of historical sources.
Historical use must be determined back to 1940 or first development using at least one of the following sources: Sanborn maps, city directories or aerial photographs.