Emerging Contaminants Summit

March 10-11, 2020

Westminster, CO
The Westin Westminster
(only 15 miles from downtown Denver)

teuscherKathleen Teuscher
Senior Project Manager/Risk Assessor
TRC Environmental

Kathleen Teuscher – TRC Senior Project Manager/Human Health Risk Assessor.  [Education: B.S., Zoology, Ohio University; M.A., Environmental Studies, Cleveland State University]  Ms. Teuscher has over 30 years of diversified experience in the chemical and environmental industry and has provided project management and key technical support for a variety of projects.  In addition to managing TRC’s Cleveland office, she has performed numerous human health risk assessments in accordance with state and federal guidelines.  Her areas of expertise include remedial investigation, risk assessment, vapor intrusion, Brownfield redevelopment, RCRA closures, numerous Phase I/Phase II environmental assessments, feasibility studies, statistical analyses, and analytical chemistry.  Ms. Teuscher has performed human health risk assessments and provided technical support for a variety of projects under such programs as CERCLA, RCRA, TSCA, individual State and EPA Brownfield Programs.  Ms. Teuscher has had successful experience working with regulators and is able to identify reasonable and protective alternatives for risk-based solutions to environmental concerns.  Her experience also includes performing lab audits, data validation, implementation of QA/QC procedures, and preparing Quality Assurance Project Plans. Prior to consulting, Kathie was QA/QC director for a large environmental laboratory.



The TSCA Nanoscale Rule -  An Update on the Status and Its Implications

Nanomaterials can exhibit chemical and physical characteristics that differ from the same chemical at a larger scale.  Therefore, the USEPA considers nanoscale materials (1–100 nanometers (nm)) as a different chemical substance than the same chemical in macroscale size, and when manufactured or imported requires them to be added to the Toxic Substance Control Act (TSCA) Inventory.  Historically, USEPA collected information and evaluated risks related to nanomaterials primarily under TSCA Section 5.  However, Section 5 limited USEPA from obtaining sufficient information on nanomaterials derived from chemical materials that are already in commerce.  Therefore, USEPA needed to develop additional regulatory means to collect information on nanomaterials not covered under Section 5. 

The Final Nanoscale Rule (finalized January 12, 2017) allows USEPA to continue evaluations of nanoscale materials derived from substances on the TSCA inventory on a case-by-case basis without the presumption of harm or safety.  The rule includes a “one-time reporting for existing discrete forms of certain nanoscale materials, and a standing one-time reporting requirement for new discrete forms of certain nanoscale materials before those new forms are manufactured or processed.”

The Final Nanoscale Rule applies to the manufacture or process of “reportable chemical substances” that: (1) are solid at standard atmospheric pressure and 25 degrees Celsius; (2) are manufactured or processed in a form where any particles are in the size range of 1–100 nm in at least one dimension, including aggregates and agglomerates; and (3) are manufactured or processed to exhibit one or more “unique and novel properties.”

The effective date for the Final Nanoscale Rule was initially May 12, 2017.  However, due to questions and comments from numerous stakeholders claiming that the rule is burdensome and unclear, USEPA delayed the effect date of the rule to August 14, 2017.  In response, USEPA recently released Draft Guidance (May 16, 2017) in the form of “frequently asked questions,” requesting comments of the Draft Guidance due by June 15, 2017. 

Some challenges of this rule include clarification of terminology, exclusions, supply chain reporting, and confidentiality requirements. This presentation will focus on the up to date status (current for the March 2018 summit) of the Nanoscale Rule and implications to industry from this ruling. 



Program Agenda  Scientific Advisory Board  Keynotes and Session Chairs  Platform Presenters  Poster Presenters