Environmental Engineering and Water Resources. Soil and Groundwater Remediation Systems. Regulatory Interfacing and Negotiations. Water and Wastewater Treatment Processes. Vapor Intrusion and Indoor Air Assessments. Laboratory Quality Assurance and Control Assessments. Wetlands and Surface Water Restoration. Alternative Energy Projects. Expert Witness and Litigation Support. Source History Establishment and Forensics. Simulation and Visualization. Site Assessment and Investigation. Odor Control and Dewatering. Site Closure Facilitation.