RandalThis is the web home for Randal W. Samstag Civil and Sanitary Engineer. Randal has over 35 years of experience in water supply, wastewater collection, and analysis of sanitation alternatives. But his primary expertise is in analysis and design of wastewater treatment: creating and using biokinetic and computational fluid dynamic (CFD) models and planning and design of wastewater treatment plants. Use this site to learn about Randal’s experience and expertise, to download presentations and other documents and to contact him for consultation.