Drummond Carpenter staff have strong expertise in developing, calibrating, and applying various surface and groundwater models. Our clients have included governmental organizations, legal entities, and private industry. Projects have included the development of HEC-RAS models to assess infrastructure performance and environmental flows; SWMM modeling of water flow and quality in urban areas; RESRAD modeling as part of low-level waste repository performance assessments; MODFLOW and FEFLOW modeling to predict contaminant plume migration and attenuation; HELP modeling to evaluate potential percolation through constructed waste disposal facilities; and ICPR modeling to evaluate groundwater recharge and flood reduction studies. Groundwater model simulations have included multi-phase flow, dissolved organics and inorganics, and radionuclides.