Nathan Pechacek, MS, MBA, DABT

• Leads daily operations of 3M’s Toxicology Lab. Manages staff and supports alternative method development. • Experience in the design and interpretation of OECD, GLP and non-GLP toxicology studies (in vitro and in vivo). • Identifies, plans, and completes hazard chemical reviews and risk assessments to support innovative technologies and products, as well as assists research labs in prioritizing and screening basic research for developing new substances. • Experience building networks of diverse stakeholders (e.g., Research & development, EHS, manufacturing, business) to facilitate completion of key technical and business objectives. • Experience establishing occupational and risk-based exposure limits (OEL, WOEL, Benchmark Dose, exposure modeling, etc.) • Actively advises and influences others on decisions related to toxicology methods, results, and endpoints. • Leads regulatory agency discussions as needed in matters related to toxicology.

1. Chair of the Ecolab network of toxicologists to develop corporate strategy, promote communication, and identify and leverage synergies across the organization. 2. Manage, develop and evaluate Toxicology and Hazard Communication professionals. 3. Deliver compliant hazard communication documents for North American operations. 4. Oversee the process to harmonize global classification of hazardous ingredients. 5. Oversee toxicity study placement with third-party contract laboratories for new and inline products. 6. Serve as a Corporate Representative in litigation. 7. Serve as a corporate representative in industry trade associations (American Cleaning Institute, American Chemistry Council, Consumer Product Safety Association) and professional societies (Society of Toxicology, American Industrial Hygiene Association, Society of Environmental Toxicology and Chemistry).

1. Manage, develop and evaluate entry and early-career professionals. 2. Deliver compliant hazard communication documents for North American operations. Ensured compliance with U.S. OSHA and Health Canada adoption of the Globally Harmonized System (GHS), respectively. Have supported other regional or country adoptions of the GHS standard. 3. Develop, implement and oversee a process to harmonize global classification of hazardous ingredients. Oversaw the evaluation of 3000+ chemicals. 4. Oversee toxicity study placement with third-party contract laboratories for new and inline products. Study sponsor for 100+ studies. 5. Serve as a Corporate Representative in litigation. 6. Serve as a corporate representative in industry trade associations (American Cleaning Institute, American Chemistry Council, Consumer Product Safety Association) and professional societies (Society of Toxicology, American Industrial Hygiene Association, Society of Environmental Toxicology and Chemistry).

1. Deliver compliant hazard communication documents for North American operations. 2. Develop, implement and oversee process to harmonize global classification of hazardous ingredients. 3. Oversee toxicity study placement with third-party contract laboratories for new and inline products. 4. Serve as a Corporate Representative in litigation. 5. Serve as a corporate representative in industry trade associations (American Cleaning Institute, American Chemistry Council, Consumer Product Safety Association) and professional societies (Society of Toxicology, American Industrial Hygiene Association, Society of Environmental Toxicology and Chemistry).

1. Provided toxicological support to a wide array of 3M businesses in the industrial, institutional and consumer business sectors. 2. Developed and implemented a process for human health assessments as part of a global Life Cycle Management project for product stewardship. 3. Conducted harmonized global classifications of hazardous ingredients. 4. Placed toxicity studies with third-party contract laboratories. 5. Served as a subject matter expert on California Proposition 65. 6. Served as a Corporate Representative in litigation. 7. Served as a corporate representative in industry trade associations (Consumer Product Safety Association) and professional societies (Society of Toxicology).

1. Served as toxicologist and risk assessor for hazardous waste sites (e.g., Superfund sites). 2. Evaluated air monitoring data in the context of human health. 3. Served as subject matter expert on US National Air Standards for ozone and particulate matter. 4. Coordinated academic, industry, governmental and non-governmental stakeholders to address air quality issues. 5. Participated in public meetings to solicit general public feedback and answer questions. 6. Reviewed, developed and interpreted environmental regulations and guidance for the TCEQ.

1. Served as a toxicologist for an USEPA-sponsored pesticide hotline. 2. Answered 2000-3000 inquiries per year on pesticides. 3. Maintained database on pesticide inquiries and oversaw data quality. 4. Prepared monthly, quarterly and annual inquiry reports to the USEPA. 5. Developed over 20 online factsheets related to pesticide ingredients and general topics.