RPI’s broad natural resources expertise combined with a focus on quantitative analyses by highly experienced staff allow us to bring a unique and rigorous approach to environmental impact and assessment projects: Applied Environmental Toxicology. Contaminant Fate and Persistence Modeling. Non-Point Source Impairment Analysis and Remediation. Chronic and Emergency Marine Debris Mapping and Remediation. Vessel Grounding Impacts and Remediation. Water Resources and Floodplain Management.