Brian R. Hitchens is a Senior Principal Hydrogeologist based in California with more than 15 years of experience focused on the evaluation and improvement of groundwater and surface water impacted by contaminants. Brian specializes in applied in situ remedial technologies, sediment remediation, data management, environmental forensics, and regulatory negotiation.
Brian served as the project manager directing the investigation and remediation of a former aerospace manufacturing facility adjacent to the San Diego International Airport. He directed and organized extensive on-site and off-site investigations, followed by the implementation of one of the largest passive bioremediation programs to date, achieving chlorinated solvent remediation with more than 1,000 injection points and nearly 1.6 million gallons of amendment injected. This aggressive approach resulted in complete remediation of the source area to below risk-based criteria within 9 months of injection. Soil, groundwater, and soil gas remediation goals were achieved for all constituents site-wide, and a no-further action letter was issued for the site as a whole. Similar results have since been achieved at two subsequent project sites.
With extensive experience in the characterization and forensic evaluation of polychlorinated biphenyls (PCBs) in building materials, soils, marine sediments, and storm drain systems, he has directed the characterization, remediation, risk assessment, and regulatory negotiations at several sites with PCB concerns in soil, sediment, groundwater, and surface water. Brian is currently managing the implementation of an enhanced monitored natural recovery – thin layer cover system to address residual PCB impacts in near-shore sediment, incorporating activated carbon amendments to reduce PCB bioavailability. This cost-effective solution is designed to meet very low regulatory thresholds, while minimizing the need for large-scale dredging.
To advance the state of the practice, Brian has long been involved with the geographic information systems and database management practice and is passionate about using data smartly, from storing it in accessible and usable formats, to developing clear visualizations that can be used to provide insight into site complexities and lead to better remedial solutions. By providing a clear analysis of often-complex data, all projects benefit, from routine investigations to in-depth litigation support matters.