Environmental
What is 'historical aerial photography' and how is it used in environmental due diligence in Illinois?
APhotographs used to establish a property's historical preservation status
BAerial photographs from different time periods used to document land use history, identify former structures or activities that may indicate contamination risk✓ Correct
CPhotography required for all Phase I environmental assessments in Illinois
DImages used by appraisers to identify improvements not listed on tax records
Explanation
Historical aerial photographs are a key tool in Phase I ESA research. By reviewing aerial photos from different decades (available from USGS, state agencies, and commercial services), environmental professionals can identify: former buildings, underground storage tanks, waste disposal areas, industrial operations, and land use changes that may indicate contamination risks not evident from current conditions. These photos help establish a property's historical use and prioritize areas for further investigation.
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