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ASTM Phase I Environmental Site Assessment Updates

February 1, 2023

ASTM Phase I Environmental Site Assessment Updates

Environmental due diligence is the first step in identifying potential environmental liabilities prior to the acquisition of real estate or business transfers. Phase I Environmental Site Assessments (ESAs) are performed in accordance with ASTM International’s E1527-21 Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process. ASTM International updated this standard in late 2022, going into effect in February 2023. Our experts discuss the new requirements within this update.

Contact Jenny Phillips, VP, Director of Technical Development Unit and CORE at to learn more about TRC’s due diligence capabilities.

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About the CORE

 The Center of Research and Expertise (CORE) is a multidisciplinary team led by proven subject matter experts who are recognized for their technical contributions and knowledge in a wide range of environmental subjects and specialties. Our purpose is to promote the expertise and talents of our team while enabling them to work at the forefront of emerging challenges and solutions. The CORE Teams contribute to the technical advancement of our professional, academic and client communities, as we work to solve clients’ issues through the improvement of science and technologies in our industry. Our CORE Teams also contribute significantly to our culture at TRC, with the intent to support and sustain growth. The work we do within TRC brings immense value to our clients, our company, and our team, and differentiates TRC’s leadership in the markets we serve. 

This team supports the growth and promotion of our staff and their technical skills, in over 30 different specialized technical areas.

Jenny Phillips, DABT, Director of Technical Development, VP

Jenny Phillips, Director of Technical Development, VP – Jenny Phillips leads the Technical Development Unit of TRC, focusing on Emerging Contaminants. She is an expert in human health and ecological risk assessment with a focus in risk communication and stakeholder discussions. Ms. Phillips also leads TRC’s Center for Research and Expertise which includes 30+ technical teams. Contact Ms. Phillips at

Learn More From Our Technical Experts

TRC's Center of Research and Expertise (CORE) is a multidisciplinary team led by proven subject matter experts in over 30 specialized technical areas. Our monthly CORE newsletter shares valuable insights on emerging technologies, significant challenges and innovative solutions present in many industries across the world. Our experts also share how they use their unique skills and experience to solve client issues and support our communities and the environment.

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