Bioaccessibility Study, Reporting, Feasibility Study and Record of Decision, Installation Restoration (IR) Sites 1, 2, 11 and 13, Naval Auxiliary Landing Field (NALF), San Clemente Island, CA.

This task order includes multiple sites and multiple project paths. IR Sites 11 and 13 required additional characterization of metals contamination in soil and an analysis of the bioaccessibility of those metals to threatened species during an Ecological Risk Assessment Refinement. IR Sites 1 and 2 required the preparation of CERCLA decision documents including a Feasibility Study, Proposed Plan, and Record of Decision.

GCE was contracted to perform multiple activities associated with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) cleanup process for three former surface disposal sites (IR Sites 1, 11 and 13) and one wastewater discharge site (IR Site 2). The three surface disposal sites were used for the disposal of various military wastes, including scrap metal, aircraft parts, electronic parts, landing mats, 55-gallon drums, metal debris and transformers. The waste disposal resulted in surface soil contaminated with various contaminants at each of the sites (metals, polychlorinated biphenyls and dioxins). The wastewater discharge site was the result of surface disposal of photography laboratory waste, which resulted in elevated concentrations of silver in soil.

Working on San Clemente Island (SCI) produced many logistical challenges due to its location that is approximately 70 miles off the coast of Southern California and its use as an active military installation with ongoing sea-to-land, air-to-land and land-to-land range activities. GCE was responsible for coordinating with SCI staff, Navy personnel, Naval Facilities Engineering Command  Southwest personnel, various regulatory agencies, and various subcontractors.

GCE was responsible for many facets of the CERCLA process for these sites, including the Site Investigation, Feasibility Study, and decision documents. GCE conducted soil, plant tissue, and avian blood sampling and prepared a bio accessibility report to support the risk assessment and remedial investigation for IR Sites 11 and 13. UXO Technicians and Qualified Wildlife Biologists were on-site during all fieldwork. GCE chartered air flights to move equipment, personnel, and samples back and forth from the Island/ For IR Site 1, GCE was responsible for the preparation of the Focused Feasibility Study. For IR Site 1 and 2, GCE produced the Proposed Plan and Record of Decision and land use control remedial design/remedial action document. GCE’s work on all sites included the completion of site safety documents for site specific work and Sampling and Analysis and Quality Assurance Project Plans for IR Sites 11 and 13.