Mr. Evans has over 30 years experience in the air pollution field. Currently, Mr. Evans directs Clean Air’s Consulting Group and is involved with a variety of research projects, white papers, and industry presentations. As Technical Leader of the Consulting Group, his responsibilities include tracking United States and international legislation and regulations affecting Clean Air clients and advising clients on the impact of new and existing regulations. He prepares regulatory briefs for Clean Air personnel and clients on issues such as test method applicability and development, data quality issues, and permitting. Mr. Evans lectures extensively on these and a variety of other air quality issues. Much of Mr. Evans recent work involves assisting refiners and petrochemical plants with issues involving industrial flares as well as implementation of EPA regulations such as NSPS Subpart Ja, MACT Subpart CC, and others. In this regard, Mr. Evans has provided technical support and consulting to several refineries and petrochemical producers involved in consent decree negotiations with US EPA regarding flare performance and efficiency and has participated at the table in these negotiations on behalf of industry. He has been directly involved with the planning and execution of most of the flare test projects that have occurred since 2009. He has provided litigation support services on flare related issues on such topics as: evaluation of true combustion/destruction efficiency, proper assist ratios for assisted flares, debunking flare analyses based on FLIR infrared and visual observation/photographs, viability of flare gas recovery, general flare performance issues, strategies for reduction of supplemental gas, and other related topics.