Chase H. Butler, M.S.
Senior Environmental Chemist
Ms. Butler is a chemist with experience in designing sampling plans and testing protocols, assessing data quality, and interpreting data to support the fulfillment of various regulatory obligations. At Gradient, she has provided technical support for chemical registration and compliance in multiple geographic regions and countries and advises on the use of appropriate chemicals for read-across of toxicological data. Prior to joining Gradient, Ms. Butler conducted research at Yale’s Center for Conservation and Preservation, studying the compounds generated during the oxidation of contemporary materials used in art and art conservation.
Regulatory Testing Oversight: Provided technical support to an industry consortium as it implemented a tiered testing program on specialty chemicals in accordance with Consent Orders issued under the Toxic Substances Control Act (TSCA). Ensured that testing was done according to standard guidelines, with modifications as needed to accommodate the unique properties of the test substances. Assisted in communicating the results with US EPA, including providing context with industry-specific insights and recommendations for the scope of testing in subsequent tiers.
PFAS Study Design and Data Validation: Assisted in developing a customized sampling and analysis plan for measuring PFAS in multiple matrices at an industrial site. Validated and interpreted the data to support regulatory reporting.
PFAS Analytical Methods: Evaluated the development of targeted methods for measuring PFAS in multiple matrices to understand improvements to sensitivity and selectivity over time and in comparison to regulatory guidance and guidelines.
PFAS Regulatory Support: Assisting companies in fulfilling regulatory reporting obligations for PFAS in the US and Canada.
Global Product Portfolio Management: Coordinated efforts to improve and maintain a custom online database for managing the regulatory compliance of products used globally.
Contaminated Site Assessment: Reviewed historical documents and prepared historical timeline of former roofing manufacturing plants to support statistical source allocation analysis of an urban Superfund site. Reviewed environmental investigations and prepared summary of contamination at the site.
Product Safety Evaluation: Reviewed GC- and LC-MS data for the presence of skin sensitizers in various polyurethane-based products. Identified appropriate chemical surrogates to facilitate hazard assessments of data-poor chemicals. Provided technical expertise on polymer formulations and additives.
Structure-Reactivity Analysis: Assessed the comparability of alpha-diketone and beta-diketone chemistries, based on first principles of physical organic chemistry.
Butler, CH. 2024. “Responsible reinvigoration: The United States semiconductor industry and the CHIPS and Science Act.” Gradient Trends 89. Winter.
Noble, A; Butler, C; Lunsman, T; Verslycke, T; Lewis, A. 2016. “A Comprehensive Approach to Evaluating the Hazards of Microplastics in the Marine Environment.” Presented at the 2016 Ocean Sciences Meeting, New Orleans, LA, February 21-26, 24p.
Zhang, J; Kneeland, JM; Butler, CH. 2015. “Using Professional Judgment to Validate Structural Alert-Based Predictive Toxicity.” Presented at the Society of Toxicology (SOT) 54th Annual Meeting, San Diego, CA, March 22-26.
Butler, CH; Whitmore, PM. 2013. “Measurement of peroxides in the volatile degradation products of polypropylene photooxidation.” Polym. Degrad. Stabil. 98:471-473.