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i 1i N • Water/Emerging Contaminants Wastewater/Stormwater Litigation Support Regulatory Compliance Technology/GIS John Shaffer is the founder and CEO of EEC. John has more than 35 years' experience managing water and wastewater assessment and treatment projects with an emphasis on emerging contaminants such as per- and polyfluoroalkyl substances (PFAS). He has managed many large projects, including a 2.5 MGD design/build wastewater treatment plant project in China. John helped develop the Water Environment Federation (WEF) / U.S. EPA fats, oils, and grease control program workshop and served as a speaker at workshops throughout the United States. He also designed and conducted 15 wastewater treatment operator training courses for metal finishers and circuit board manufacturers in Southern California on behalf of the Orange County Sanitation District. John is considered a PFAS chemistry expert and has been asked to speak on emerging PFAS issues to the National Groundwater Association, the National Association of Clean Water Agencies, the Textile Rental Services Association, and the Orange County City Attorneys. John holds a General Engineering Contractors License (A-743267), with a Hazardous Substances Removal Certification. He is a long-standing, active member of the Water Environmental Federation, California Water Environment Association, and the California Association of Sewering Agencies. John studied biochemistry at the University of California, Los Angeles. EXPERIENCE WATER/WASTEWATER Principal Chemist, QA/QC, Owner's Representative for PFAS ( City of Santa Ana ( California • Providing ongoing chemistry expertise related to groundwater wellhead PFAS treatment options. • Regulatory guidance planning involving California notification levels, response levels, and pending national regulations. • Advising on PFAS waste disposal options. Principal Chemist, QA/QC, Industrial Wastewater PFAS Characterization Sampling ( Confidential Industrial Client Nationwide • Industrial wastewater sampling at multiple facilities in different states throughout the nation to characterize PFAS and other water quality issues to inform the design of treatment systems. • Targeted samples at various locations within each waste stream to identify opportunities for source reduction and blending to reduce PFAS treatment costs. Principal Chemist, PFAS Local Limit Review and Negotiations ) Confidential Industrial Client I Michigan • Providing third party technical review of the first proposed PFAS local limit in the nation. • Engaging with the POTW to ensure the proposed limit is technically based. Principal Chemist, QA/QC, Local Limits Evaluation ( OCSD ( Fountain Valley, CA • Provided oversight and senior QA/QC review of all project tasks, including technical memoranda, final reports, and presentations to the OCSD. • The evaluation consisted of employing EPA Local Limits Development Guidance (2004) to develop maximum allowable headworks loadings and allowable industrial loadings.