C&IH proudly announces that Mr. Daniel Hall, PE, Director of Engineering, is now a certified industrial hygienist as recognized by the American Board of Industrial Hygiene. Mr. Hall has been with C&IH since 2001 and provides technical oversight for projects involving industrial hygiene engineering controls, statistical data analysis, and computer modeling. The focus of his engineering controls project experience is the evaluation of local exhaust ventilation (LEV) and general dilution ventilation systems, including the design of new systems and improvement of existing systems. Mr. Hall utilizes computer modeling software to generate three-dimensional models to evaluate workplace ventilation performance criteria for specified applications such as laboratory and industrial process environments, LEV systems within pharmaceutical laboratory settings, and other commercial and governmental settings. His statistical expertise includes proficiency using stochastic methodologies for compiling and analyzing data for exposure and risk assessments, including Monte Carlo distribution analysis of retrospective exposure data. Mr. Hall has presented at national conferences on statistical analytical methodologies and computer modeling techniques utilized in retrospective exposure characterization of workers and outdoor contaminant dispersion for the purpose of risk assessment activities. He is also a member of the American Society of Civil Engineers (ASCE), the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE), the national and local American Industrial Hygiene Association (AIHA), and is an active member of the national AIHA Engineering Committee.