Bob's consulting services focus on the strategic management of environmental liabilities, working with private sector clients who want to reduce financial exposures associated with cleaning up environmentally impacted sites. He specializes in the innovative application of in situ groundwater remediation solutions (e.g., nano-scale zero-valent iron, bioremediation, in situ chemical oxidation, and other redox controls) to remediate contaminants such as dissolved-phase chlorinated solvents, mixed NAPL source zones, and inorganics such as arsenic and selenium. He has more than 20 years of experience in conducting assessments of subsurface vapor intrusion to indoor air and has conducted vapor intrusion evaluations for sites regulated under CERCLA and RCRA, Brownfields redevelopment sites, and properties involving private-party real estate transaction due diligence initiatives.
With extensive site assessment and remediation experience Bob provides specialty expertise on geochemical issues, particularly forensics such as isotopic contaminant fingerprinting, and evaluating the mobility of metals in various redox environments created through natural processes, waste-disposal practices, and engineered in situ redox remediation systems. He is well-versed in risk assessment, site reuse evaluations, and negotiation of remedy performance standards. His risk assessment experience includes evaluations of indoor air pathways and development of site-specific, risk-based cleanup goals and performance standards for soil and groundwater. Additionally, Bob provides consulting services on the natural and anthropogenic nature of environmental contaminants.
To advance the state of the practice, his efforts have focused on the use of naturally-occurring and engineered subsurface biogeochemical conditions in soil and groundwater to promote in situ degradation and reduced mobility of environmental contaminants. He currently provides national leadership on coal ash impacts to groundwater.