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gaseous transport of volatile organic compounds (VOCs) in the subsurface has applications to soil-gas monitoring, transport modeling, and the design and efficient operation of soil-vapor extraction systems. He has lectured extensively on the subjects of groundwater hydrology and contaminant transport, and he has provided expert witness testimony in hazardous waste cases. Dr. Farr serves on the editorial boards of the journals Ground Water and Ground Water Monitoring and Remediation, and he is an editorial reviewer for Water Resources Research. Representative experience at ICF Kaiser Engineers includes: • Conducting chemical transport modeling to determine site-specific, health-based cleanup levels for petroleum hydrocarbons and chlorinated VOCs in soil, accounting for potential health impacts associated with chemical migration downward to groundwater and upward to indoor and outdoor air. • Conducting remedial system design analysis for one of the World's largest soil- vapor extraction (SVE) systems. The design analysis involves numerical modeling of subsurface gas flow and VOC transport to select optimal SVE well locations, screened-depth intervals, extraction flow rates, and VOC mass removal rates. • Serving on the Underground Storage Tank Technical Advisory Committee (USTTAC) to the California State Water Resources Control Board, guiding the LUFT Manual revision and developing soil and groundwater cleanup standards. Levine•Fricke • Managing and directing RI/FS projects and serving as a technical resource for several RDFS projects, developing project strategies and conducting feasibility studies and technical analyses to provide a quantitative basis for the design and operation of remedial systems. • Representing various clients at numerous meetings with regulatory agencies, presenting proposals and work plans, and negotiating favorable regulatory treatment for clients. Negotiated reasonable cleanup goals for vadose-zone soils at several sites, including two U.S. EPA, Region IX Superfund sites. Participated in a major PRP cost allocation dispute resolution for a U.S. EPA, Region IX Superfund site. • Directing chemical transport modeling efforts for VOCs in soil and groundwater for risk assessment purposes to establish acceptable soil cleanup goals, and provide the basis for remedial system design and operation at numerous sites, including four Superfund sites. • Conducting model-aided design of several liquid recovery and soil-vapor extraction systems for solvents in the subsurface. Directed transport modeling efforts to assess VOC concentrations of indoor air for risk assessments at two Superfund sites.