David Riotte is a Principal Environmental Engineer based in Florida with more than 15 years of experience focused on site assessment and remediation, Brownfields redevelopment, construction management, and the closure and long-term monitoring of municipal solid waste disposal facilities.
As a consultant, Dave combines practical, hands-on experience with innovative engineering designs to address client challenges. He has led environmental site characterizations for soil, sediment, groundwater, and soil gas impacts for a range of public and private sector clients, including railway operators, paper manufacturers, real estate developers, the U.S. Coast Guard, NASA, regional municipal solid waste disposal agencies and the state of Florida. His thorough understanding of state and federal regulations affords him the ability to successfully negotiate with a wide variety of regulators, clients, the public, and other stakeholders.
To assist his clients, Dave has assessed and designed innovative remediation plans for sites impacted by a wide range of contaminants, including 1,4-dioxane, petroleum hydrocarbons, polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and metals regulated by the Resource Conservation and Recovery Act. At NASA's Kennedy Space Center, he was the design engineer for a 375-foot bioventing cut-off wall that intercepted a plume of vinyl chloride migrating from the Vehicle Assembly Building. He also was the lead engineer for the design and construction of a 1,450-foot long, 50-foot deep slurry soil and bentonite wall at a former creosote storage site. And, he has completed assessments or remedial designs for dozens of impacted sites in Florida's Dry Cleaning Solvent Cleanup and Hazardous Waste Program.
To advance the state of the practice, Dave recently collaborated with other Geosyntec engineers and scientists on the development of a new method to screen soils for coal ash using field microscopy techniques. His technical advocacy on behalf of his clients with a regulatory agency for use of field-based microscopy techniques in lieu of traditional analytical testing reduced his client's potential liability, accelerated the remedial activities, and resulted in significant cost savings.