Non-intrusive Investigation: Reviews property history, ownership, and past uses to detect potential contamination. ? Site Inspection: Visual examination of the property and surroundings for environmental risks. ? Historical Research: Analysis of maps, aerial photos, and records to identify prior hazardous activities. ? Interviews: Discussions with owners, occupants, or local authorities for environmental insights. ? Goal: Identify Recognized Environmental Conditions (RECs) to decide if further investigation is needed.