Daniel B. Stephens & Associates, Inc. (DBS&A) is an employee-owned water resources and environmental consulting firm providing comprehensive services in groundwater and surface water hydrology, and soil science. Particular areas of expertise include hydrogeologic investigations, water resources planning and development, water rights, studies of contaminant transport in soil and groundwater, numerical modeling, remediation of soil and groundwater, and environmental litigation support.

DBS&A's Soil Testing and Research Laboratory performs analyses of hydraulic properties of soils, including special tests not common to traditional soil testing laboratories.

	DBS&A is distinguished by an established expertise in vadose zone processes. The vadose zone is the area between the ground surface and the water table and is comprised of rock and soil; it plays a vital role in groundwater replenishment and groundwater quality protection... read more >>	Vadose Zone Hydrology by Daniel B. Stephens, Ph.D. and Handbook of Vadose Zone Characterization & Monitoring co-authored by Stephen J. Cullen, Ph.D.