Kelly Eger-Smith served as the Project Manager for this complex site assessment and remediation project at a public marina in Islamorada, Florida. The marina was located on Biscayne Bay, an aquatic preserve as designated by the State of Florida. A Phase II Environmental Site Assessment of the site confirmed the presence of soil and groundwater impacts resultant of diesel fuel discharges from the underground piping associated with a boat fueling system. Over 1,000 tons of soil and coquina rock was excavated as part of a source removal and the damaged piping was abandoned and replaced.
Following the excavation, a vacuum truck was utilized to remove over 600 gallons of free product from the resultant excavation pit. The impacted area was subsequently backfilled and re-asphalted. Following free product removal, a monitored natural attenuation plan was implemented pursuant to criteria specified by the Florida Department of Environmental Protection (FDEP). Semi-annual sampling was conducted at the site for two years. In an effort to expedite site closure, we proceeded with an aggressive active remediation approach. A soil vapor extraction (SVE)/air sparge system was installed at the site. The system design was unique in that it incorporated horizontal SVE wells due to the high water table and tidal influence of the adjoining Bay. Quarterly sampling and system operation and maintenance was conducted and reported to FDEP. Maintenance included replacing spent carbon and ensuring the system was performing optimally. Site rehabilitation was completed in less than one year from system startup and “No Further Action” status was granted by FDEP.