Brian Hitchens is a Senior Principal Hydrogeologist based in California with more than 20 years of experience focused on the assessment and remediation of polychlorinated biphenyls, chlorinated solvents, and heavy metals in sediment, soil, and groundwater.
He manages Geosyntec’s Remediation Group in San Diego and specializes in applied in-situ remediation, litigation support, contaminated sediment forensics and mitigation, data management, and data visualization.
Brian served as the project manager directing the investigation and remediation of a former aerospace manufacturing facility adjacent to the San Diego International Airport, where he implemented one of the largest passive bioremediation programs for chlorinated solvents and hexavalent chromium to date. This project injected nearly 1.6 million gallons of electron donor through over 1,000 direct injection points. 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 entire 44-acre site.
Brian has developed extensive experience in the characterization and forensic evaluation of polychlorinated biphenyls (PCBs) in building materials, soils, sediments, storm drains, and sewer systems. He directed the design and implementation of the first enhanced natural recovery – thin layer cover to address residual PCB impacts in San Diego Bay. This cover incorporated an activated carbon amendment to reduce PCB bioavailability. This cost-effective solution was designed to meet very low regulatory thresholds, while minimizing the need for large-scale dredging. The project met all design and performance goals following implementation and a no-further action letter was issued for the site.
Brian has long been involved with the geographic information systems and database management practice and is passionate about increasing the value of data collected from sites, developing clear visualizations that can be used to provide insight into site complexities, which 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.