Clayton Engineering & Associates provides Phase I Environmental Site Assessments (ESAs) in accordance with ASTM E1527-21 to support real estate transactions, lending, and risk management decisions. Our assessments identify Recognized Environmental Conditions (RECs) related to hazardous substances and petroleum products through records review, site reconnaissance, and historical research. We deliver clear, defensible reports that help clients understand environmental risk, meet regulatory and lender requirements, and move transactions forward with confidence—on time and at a fixed, transparent cost

Why a Phase I?

A Phase I Environmental Site Assessment (ESA) is a comprehensive review of a property to identify any potential environmental concerns or contamination risks before purchase, development, or financing. It includes a records review of historical uses, regulatory databases, and past ownership; a site inspection to observe current conditions; and interviews with owners, occupants, and local officials. The goal is not to test soil or water but to determine whether any Recognized Environmental Conditions (RECs) exist and whether further investigation—such as a Phase II assessment—is warranted.