Guam Deep Ocean Disposal Site (G-DODS) Monitoring Reports

EPA's Pacific Southwest (Region 9), often in coordination with the U.S. Army Corps of Engineers (USACE), conducts oceanographic surveys to identify appropriate locations for ocean disposal sites and to monitor the impacts of regulated dumping at the ocean disposal sites. Region 9 monitors Guam Deep Ocean Disposal Site (G-DODS) to ensure that unexpected or significant negative effects are not occurring from past or continued use of the disposal site and to verify regulatory and permit compliance.

• 2022 EPA Guam Deep Ocean Disposal Site Monitoring and Assessment Report (pdf) (1.86 MB, August 6, 2024)
  This report details the methods and results of the 2022 EPA oceanographic monitoring survey of the Guam Deep Ocean Disposal Site (G-DODS).
• Draft Field Report: Baseline Studies Conducted for the Designation of an Ocean Dredged Material Disposal Site, Apra Harbor, Guam (pdf) (605.54 KB, February 2009)
  The objective of this field sampling program was to characterize the site conditions within and surrounding two potential ocean dredged material disposal sites (ODMDS) offshore of Apra Harbor, Guam. This program included the sample collection, processing, analysis and reporting of environmental parameters such as sediment and water quality, benthic and demersal communities and the collection of regional oceanographic current data.
• Ocean Current Study: Ocean Dredged Material Disposal Site, Apra Harbor, Guam: Final Report (pdf) (7.92 MB, August 2007)
  Contains results of study designed to evaluate oceanographic current data as modeled by NAVO in order to understand the regional current regime and to use these data in USACE & SAIC models.
• Zone of Siting Feasibility Study, Ocean Dredged Material Disposal Site, Apra Harbor, Guam: Final Report (pdf) (1.37 MB, September 2006)
  The purpose of this study is to evaluate the feasibility of designating an ODMDS near Apra Harbor, Guam. This evaluation identifies the regulatory, technical, logistical, economic and environmental issues, including social and cultural resource concerns. This report also documents existing data which may be used for development of the site designation documentation and field sampling efforts required to fill data gaps. A preliminary schedule and potential costs associated with data collection an
• Presentation: Overview of the Draft EIS (pdf) (3.47 MB, August 20, 2009)
  EPA's informational presentation made at public meeting, August 20, 2009, on proposed ODMDS offshore of Guam, containing overview of the draft EIS.