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Geometric Decoration

John Xiong, Ph.D., P.E.

Practice Leader, Emerging Contaminants

To solve his client’s most vexing problems, John draws on the diverse perspectives of the professional societies at which he holds leadership positions. As Haley & Aldrich’s emerging contaminants practice leader, he oversees the company’s efforts to develop and provide innovative technical solutions for emerging contaminants such as per- and polyfluoroalkyl substances (PFAS), 1,4-dioxane, and 1,2,3-trichloropropane (TCP).

Over his 16 years of experience in environmental engineering, consulting, and research, John has developed cost-effective and streamlined strategies for final remedies accepted by federal and state regulatory agencies on projects that entail complex technical and policy issues.

John has also held primary roles in the invention of two patented technologies and has published more than a dozen papers in peer-reviewed scientific journals. He has designed and implemented a wide range of novel and traditional soil and groundwater remedial systems, including nanoscale zero valent iron, enhanced bioremediation, in situ chemical oxidation, and soil vapor extraction.

  • Checkmark Applied research
  • Checkmark Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) site management
  • Checkmark Groundwater characterization
  • Checkmark Regulatory expertise
  • Checkmark Remedial investigation
  • Checkmark Soil characterization
  • Checkmark Soil remediation

“I love helping my clients solve challenges, especially when the stakes are high. It’s exciting to work on such important projects and be able to achieve cost savings through innovative thinking.”