Former Atlantic Fleet Weapons Training Area - Vieques

Environmental Restoration Program Public Website

Background

Vieques is located approximately 7 miles southeast of Puerto Rico’s main island and encompasses 33,000 acres, although most of the island’s approximately 9,000 residents live in or around two main towns—Isabel Segunda on the north shore and Esperanza on the south shore (Figure 1).

Figure 1: Regional Location Map

From the 1940s until 2003, the U.S. Navy administered lands on both the western and eastern ends of Vieques. The former Atlantic Fleet Weapons Training Area in Vieques, Puerto Rico, served as the Navy’s training range for ensuring combat readiness of U.S. Atlantic Fleet Forces and for North Atlantic Treaty Organization (NATO) operations. From the mid-1940s until 2003, more than 300,000 munitions were fired during military training operations. Live-fire training on Vieques ceased in 2001, although periodic training with concrete-filled bombs and blank bullets continued until 2003, when all Navy training ceased.

On April 30, 2001, 4,250 acres of the former Naval Ammunition Support Detachment (NASD) on the western side were transferred to the Municipality of Vieques (MOV), 3,050 acres to the U.S. Department of the Interior (DOI) to be managed as part of the Vieques National Wildlife Refuge by the United States Fish and Wildlife Service (USFWS), and 800 acres to the Puerto Rico Conservation Trust (PRCT, now known as "Para La Naturaleza"), as required by Public Laws 106-398 and 107-107 (Figure 2).

In 2003, the Navy transferred all 14,573 acres of the former Vieques Naval Training Range (VNTR) on the east side to DOI in accordance with Public Law 107-107, to be administered by USFWS as part of the Vieques National Wildlife Refuge. The law required the former Live Impact Area (LIA) on the east side to be managed as a wilderness area with no public access (Figure 3).

Because the Commonwealth of Puerto Rico considered Vieques the highest priority facility for cleanup, large portions of Vieques and the surrounding waters were placed on the National Priorities List (NPL) in 2005.

The Vieques National Wildlife Refuge houses a variety of natural resources, including sensitive habitats such as mangroves, subtropical dry forests, lagoons, and coral reefs, and endangered species such as sea turtles, manatees, and brown pelicans. Portions of the former installation are open or planned to be open to the public for recreation and for access to culturally significant areas.

Figure 2 - Former NASD (West) Vieques Sites

Figure 3 - Former VNTR (East) Vieques Sites

Figure 4 - East Vieques Site Detail

Vieques Environmental Restoration Program

The Vieques Environmental Restoration Program faces challenges such as unexploded ordnance across thousands of acres of land and seafloor, and abundant ecologically and culturally sensitive resources. To meet these challenges, the Vieques Environmental Restoration Program Team comprises representatives from the Naval Facilities Engineering Systems Command (NAVFAC) Atlantic, the Environmental Protection Agency (EPA), the Puerto Rico Department of Natural and Environmental Resources (PRDNER), National Oceanic and Atmospheric Administration (NOAA), National Marine Fisheries Service (NMFS), DOI, and USFWS. The 2007 Federal Facility Agreement (FFA) establishes the framework for the stakeholder agencies to collaboratively implement the Environmental Restoration Program under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and achieve the following objectives:

Implement prompt actions to protect human health, safety, and the environment
Manage and prioritize investigations and remedial actions, based on the risk to human health and the environment, anticipated land use, and available funding
Develop safe, cost-effective, and innovative cleanup approaches and technologies
Execute a community involvement program to promote public safety and stakeholder participation in the cleanup process
Maximize partnerships with federal, Commonwealth, and local authorities to accelerate achieving land use goals through interim actions and final decisions

The Vieques Environmental Restoration Program was presented with the 2016, 2018, and 2020 Secretary of the Navy and Secretary of Defense Environmental Award for Environmental Restoration, Individual/Team, and the 2022 Secretary of the Navy Environmental Award for Environmental Restoration, Individual/Team. The award recognizes the team for efforts to protect human health and the environment by cleaning up Department of Defense sites in a timely, cost-efficient, and responsive manner.

Additional information about the Vieques Environmental Restoration Program is contained in the current Site Management Plan (SMP) and previous SMPs for sites where work has been completed. The SMP is updated yearly and is available in its entirety in the Administrative Record with the most current SMP available at this link.

A brief description of the former NASD (west Vieques) and the former VNTR (east Vieques) sites can be found below, along with the current CERCLA status of each site.

Description of West Vieques Sites

The former NASD covers 8,200 acres on the west side of the island and was used to store munitions and other support facilities for Atlantic Fleet training. On April 30, 2001, the 8,114-acre former NASD was apportioned and transferred to DOI, MOV, and the PRCT in accordance with Public Laws 106-398 and 107-107. The property owned by DOI (approximately 3,158 acres) is managed by the USFWS as part of the Vieques National Wildlife Refuge. As noted previously, on February 11, 2005, Vieques was placed on the NPL, which required all subsequent environmental restoration activities to be conducted under CERCLA.

There are 17 terrestrial sites on west Vieques, comprising one munitions response site (Solid Waste Management Unit [SWMU] 4) and 16 environmental sites. A portion of the offshore munitions site (UXO 16) is also associated with west Vieques and is located immediately adjacent to SWMU 4 (Figure 2). To date, 15 of the 16 environmental sites have been completed with no further action required. The Record of Decision for the remaining environmental site (Area of Concern [AOC] E) has been finalized, the remedy has been implemented, and the site is currently under long-term monitoring to monitor groundwater contaminant decline to meet remedial goals. In addition, one munitions response site (SWMU 4) has completed the remedy implementation phase in September 2023 and periodic groundwater performance monitoring for perchlorate and LUC/MEC inspections have been initiated.

UXO 16 is the underwater site adjacent to munitions sites on the VNTR and the NASD. With respect to the NASD, the offshore, underwater area adjacent to SWMU 4 may have been impacted by munitions ”kick out” from the open burn/open detonation (OB/OD) activities. This offshore area has achieved a Record of Decision in FY23 and is currently in the Remedial Design phase with remedial action fieldwork anticipated in FY24.

A brief description of the sites that are currently in or have completed the CERCLA process is provided below, along with their key CERCLA document(s). All public documents related to these sites can be found in the Administrative Record.

Munitions Response
Site	Name	Description	Relevant Documents
SWMU 4	Inactive Open Burn/Waste Explosive Detonation Range	SWMU 4, located at the western end of the former NASD (Figure 2), is a former OB/OD area used for the thermal destruction of retrograde and surplus munitions, fuels, and propellants from 1969 through 1979, and may have periodically been used as far back as the late 1940s. The OB/OD operations were conducted in 16 man-made earthen bermed pits of various shapes. Based on information gathered during historical investigations beginning in 1984, a Remedial Investigation/Feasibility Study was performed between 2002 and 2009 to assess the nature and extent of munitions and associated contaminants at the site, determine risks to human and ecological (plants and animals) receptors based on anticipated land uses, and evaluate remedial alternatives to address explosive hazards (referred to as “munitions and explosives of concern” or MEC for short) potentially remaining at the site as well as unacceptable risks posed by contaminants identified in site media. A Supplemental Remedial Investigation was performed in 2014 to refine the understanding of contaminant levels in lagoon fish and crab; the results showed no unacceptable risk for consumption of these organisms. A Feasibility Study Addendum was produced in 2017 to refine the remedial alternatives evaluated. Based on findings and evaluations in the 2012 Remedial Investigation/Feasibility Study Report, 2017 Feasibility Study Addendum (which includes information from the Supplemental Remedial Investigation), and munitions removal actions performed in 2009/2019 and 2015, a Proposed Remedial Action Plan was issued for public comment in 2018 and a Record of Decision was signed by the Navy and regulatory agencies in 2019. Because past removal actions addressed MEC within all areas planned for public use, the selected remedy addresses potential MEC remaining at the site using land use controls and periodic monitoring. The remedy also includes land use controls and long-term monitoring to ensure groundwater at the site is not used as a potable source until perchlorate concentrations naturally attenuate to acceptable levels. The Remedial Action Work Plan was issued in May 2022 and the remedy implementation was conducted in April 2023. The Remedial Action Completion report was finalized in September 2023 and periodic groundwater performance monitoring for perchlorate and LUC/MEC inspections have been initiated.	SWMU 4 Remedial Investigation/Feasibility Study, May 2012 SWMU 4 Feasibility Study Addendum, April 2017 SWMU 4 Proposed Remedial Action Plan, July 2018 SWMU 4 Record of Decision (English), September 2019 SWMU 4 Record of Decision (Spanish), September 2019 SWMU 4 Remedial Action Work Plan, March 2022 SWMU 4 Remedial Action Completion Report, September 2023
UXO 16	Underwater Areas	The underwater areas adjacent to east Vieques (former VNTR) and west Vieques (former NASD) have a combined size of approximately 11,500 acres and are known or suspected to have been impacted by munitions. Because of the large size of UXO 16, the area is being subdivided into multiple, focus areas for investigation and cleanup. Although the vast majority of UXO 16 lies adjacent to the former VNTR in east Vieques, a portion of the site occurs adjacent to the western end of Vieques, including three former anchorage areas, the area around Mosquito Pier, and the area just offshore of SWMU 4. The anchorage areas and Mosquito Pier are areas where ordnance from Navy ships may have fallen into the water during loading and unloading operations. These areas are currently in the Remedial Investigation planning phase. The offshore area adjacent to SWMU 4 (referred to as UXO 16.1 and shown in Figure 2) is an area where munitions and associated debris ejected by the OB/OD activities at SWMU 4 may have fallen. Based on this information, a Remedial Investigation was performed between 2012 and 2016 to characterize the nature and extent of MEC on and beneath the seafloor as well as potential contamination associated with these underwater munitions. Of the 63 munition-related items identified within UXO 16.1, only 4 MEC were found. Further, no explosive chemicals were detected in sediment samples collected and all inorganics concentrations were attributable to natural conditions (in other words, originating from the surrounding rock on land and underwater). Details of the Remedial Investigation findings, evaluations, conclusions, and recommendations can be found in the UXO 16.1 Remedial Investigation Report issued in 2018. Although the information gathered during the Remedial Investigation indicates there are likely very few MEC present within UXO 16.1, remedial alternatives were evaluated in the 2022 Feasibility Study Report to address the potential for MEC to remain at the site in consideration of likely recreational use of the area. Based on the findings and evaluations in the Remedial Investigation Report and Feasibility Study Report, a Proposed Remedial Action Plan that summarizes the various remedial alternatives evaluated for UXO 16.1 and describes the rationale for the recommended remedial alternative was issued for public comment in October 2022. Nearshore MEC removal and land use controls was selected as the remedy in the UXO 16.1 ROD. The remedial action implementation is anticipated for FY 2024.	UXO 16.1 Remedial Investigation Report, July 2018 UXO 16.1 Feasibility Study, February 2022 UXO 16.1 Proposed Plan, October 2022 UXO 16.1 Record of Decision (English), September 2023 UXO 16.1 Record of Decision (Spanish), September 2023

Environmental
Site	Name	Description	Relevant Documents
AOC B	Former Wastewater Treatment Plant (WWTP)	AOC B was a former WWTP and discharge area located on southwest end of the Public Works Area (Figure 2). The site was investigated during a Preliminary Assessment/Site Inspection. Based on the findings of the Preliminary Assessment/Site Inspection, which indicated the site posed no unacceptable risk to human health or the environment, AOC B was included in a 2006 No Further Action Report for Nine Sites. In 2007, the Puerto Rico Environmental Quality Board concurred with the No Further Action findings. A Site Inspection for Per-and Polyfluoroalkyl Substances (PFAS) is currently underway at AOC B because PFAS were not historically evaluated there (see “Potential PFAS Areas of Interest (AOIs)” in this table for additional detail).	No Further Action Report for Nine Sites at the Former NASD, October 2006 Puerto Rico Environmental Quality Board Concurrence, February 2007
AOC E	Former Underground Storage Tank Site at Building 2016	AOC E is located within the public works area (Figure 2) and was the site of a former 550-gallon underground storage tank (UST) used from 1970 to 1996 to store waste oil from vehicle maintenance activities. Releases from the former UST and associated infrastructure resulted in petroleum-related contamination in groundwater within a relatively small area around the former UST, as documented in the 2008 AOC E Remedial Investigation Report. Based on evaluation of potential remedial alternatives in the 2012 Focused Feasibility Study Report, a Proposed Remedial Action Plan was issued for public comment in 2013 and a Record of Decision was signed by the Navy and regulatory agencies in 2015. Because a past study at the site demonstrated in situ chemical oxidation (ISCO) was effective at addressing groundwater contaminant concentrations above drinking water standards, land use controls and groundwater monitoring were deemed the appropriate mechanism for ensuring groundwater at the site is not used as a potable source until groundwater contaminant concentrations reach drinking water standards in response to past ISCO applications. The remedial action also includes performing additional ISCO applications to address contaminant concentrations that persist above drinking water standards. In accordance with the 2015 AOC E Remedial Acton Work Plan and 2018 Remedial Action Work Plan Addendum, annual land use control inspections and groundwater monitoring to evaluate progress toward achieving remedial goals have been conducted at AOC E since 2015. Because several contaminants persisted at concentrations above drinking water standards, an additional ISCO application was performed in 2018 in accordance with the Remedial Action Work Plan Addendum, as documented in the 2019 Interim Remedial Action Completion Report. Following the 2018 ISCO application annual groundwater monitoring and land use control inspection continued. Information collected during the groundwater sampling and inspection events, as well as the additional ISCO application, are summarized in annual status reports, the most recent of which was issued in 2023.	AOC E Remedial Investigation Report, July 2008 AOC E Focused Feasibility Study, November 2012 AOC E Proposed Remedial Action Plan, November 2013 AOC E Record of Decision (English), January 2015A AOC E Record of Decision (Spanish), January 2015A AOC E Remedial Action Work Plan, January 2015 AOC E Remedial Action Work Plan Addendum, July 2018 AOC E Interim Remedial Action Completion Report, September 2019 AOC E Annual Status Report, September 2023
AOC H	Abandoned Power Plant	AOC H (Figure 2) was a power plant that operated between 1941 and 1943. The site was also used for firefighter training from the 1960s into the 1980s. The 2007 Remedial Investigation Report determined there were no unacceptable human health or ecological risks associated with the site. Therefore, a No Further Action Record of Decision was signed by the Navy and regulatory agencies in 2008. A Site Inspection for PFAS is currently underway at AOC H because PFAS were not historically evaluated there (see “Potential PFAS Areas of Interest (AOIs)” for additional detail).	AOC H Remedial Investigation Report, July 2007 AOC H Record of Decision (English), September 2008 AOC H Record of Decision (Spanish), September 2008
SWMU 6	Former Mangrove Disposal Site	SWMU 6 is a former 0.6-acre site located along Highway 200 near Laguna Kiani (Figure 2). The site was used during the 1960s and 1970s as a disposal area for general facility wastes, including bottles, rubble, and empty containers of lubricants, oil, solvents, and paints. Based on the findings and evaluations included in the 2007 Remedial Investigation Report, a removal action was conducted in 2009 to remove the debris and contaminated soil at the site. Following the removal action, additional sediment data were collected and evaluated as part of a Supplemental Remedial Investigation, the results of which demonstrated no unacceptable risk to human health or the environment. Therefore, a No Further Action Record of Decision was signed by the Navy and regulatory agencies in 2018. A Site Inspection for PFAS is currently underway at SWMU 6 because PFAS were not historically evaluated there (see “Potential PFAS Areas of Interest (AOIs)” at the bottom of the previous table for additional detail).	SWMU 6 Remedial Investigation Report, February 2007 SWMU 6 Remedial Investigation Report Addendum, January 2016 SWMU 6 Record of Decision (English), July 2018 SWMU 6 Record of Decision (Spanish), July 2018
SWMU 7	Former Quebrada Disposal Site	SWMU 7 (Figure 2) was an ephemeral stream channel used between approximately 1965 and 1980 for disposal of trash including lubricants, oils, solvents, paint, old tires, sheet metal, empty containers such as drums, cans, and bottles, old batteries, and construction rubble. The 2008 Remedial Investigation Report determined the debris represented a potential long-term source of contamination at the site. Therefore, a removal action was conducted in 2009 to remove the debris and contaminated soil identified during the Remedial Investigation. Evaluation of post-removal confirmatory samples determined there were no unacceptable human health or ecological risks remaining; therefore, a No Further Action Record of Decision was signed by the Navy and regulatory agencies in 2011. A Site Inspection for PFAS is currently underway at SWMU 7 because PFAS were not historically evaluated there (see “Potential PFAS Areas of Interest (AOIs)” at the bottom of the previous table for additional detail).	AOCs J and R and SWMU 7 Proposed Plan, February 2011 AOCs J and R and SWMU 7 Record of Decision (English), September 2011 AOCs J and R and SWMU 7 Record of Decision (Spanish), September 2011
Potential PFAS Areas of Interest (AOIs)	AOC B AOC H SWMU 6 SWMU 7 Former Fire Station Building 2046 at the Public Works Area Potential Former Motor Pool Area	Since the AOC H, SWMU 6, and SWMU 7 No Further Action Records of Decision and the AOC B No Further Action Closeout were issued, PFAS have been identified nationwide as emerging chemicals of environmental concern. In response, the Navy completed a Preliminary Assessment of PFAS at the former NASD in 2020 and identified the six areas of interest (AOIs) listed here to the left where PFAS-containing materials may have been released. A Site Inspection is currently underway for these six AOIs.	PFAS Preliminary Assessment Report, April 2020 PFAS Site Inspection Sampling and Analysis Plan, December 2021

Environmental
Site	Name	Description	Relevant Documents
AOC C	Drainage Ditch at Former Transportation Shop	AOC C was a drainage ditch near a former transportation shop within the Public Works Area (Figure 2) where an oily sheen was observed. The site was investigated during a Preliminary Assessment/Site Inspection. Based on the findings of the Preliminary Assessment/Site Inspection, which indicated the site posed no unacceptable risk to human health or the environment, AOC C was included in a 2006 No Further Action Report for Nine Sites. In 2007, the Puerto Rico Environmental Quality Board concurred with the No Further Action findings.	No Further Action Report for Nine Sites at the Former NASD, October 2006 Puerto Rico Environmental Quality Board Concurrence, February 2007
AOC F	Former Underground Injection Control (UIC) Septic Tank	AOC F was a septic tank near the former Enlisted Men’s Club at the former Public Works Area (Figure 2). The site was investigated during a Preliminary Assessment/Site Inspection. Based on the findings of the Preliminary Assessment/Site Inspection, which indicated the site posed no unacceptable risk to human health or the environment, AOC F was included in a 2006 No Further Action Report for Nine Sites. In 2007, the Puerto Rico Environmental Quality Board concurred with the No Further Action findings. In 2015, the septic tank was abandoned in accordance with procedures approved by the Puerto Rico Environmental Quality Board.	No Further Action Report for Nine Sites at the Former NASD, October 2006 Puerto Rico Environmental Quality Board Concurrence, February 2007 AOC F Closure Report, September 2015
AOC I	Former Asphalt Plant	AOC I (Figure 2) is a former asphalt plant that operated from the 1960s until 1988. The 2008 Remedial Investigation Report identified relatively low levels of contamination in soil and groundwater at the site, likely associated with minor drips and spills associated with asphalt operations. In addition, a relatively small area of groundwater contamination was identified. Based on the findings of the Remedial Investigation, a study using ISCO to treat the area of groundwater contamination was conducted between 2010 and 2012, which reduced contaminant levels to acceptable levels (i.e., Federal, Commonwealth, or risk-based). Based on these results, a No Further Action Record of Decision was signed by the Navy and regulatory agencies in 2014. In 2015, the septic tank was abandoned in accordance with procedures approved by the Puerto Rico Environmental Quality Board.	AOC I Remedial Investigation Report, June 2008 AOC I Record of Decision (English), September 2014 AOC I Record of Decision (Spanish), September 2014
AOC J	Former Operations/Staging Area Disposal Site	AOC J (Figure 2) was a solid waste disposal site for construction-related materials in use from 1965 to 1973. The 2007 Remedial Investigation Report determined the debris represented a potential long-term source of contamination at the site. Therefore, a removal action was conducted in 2009 to remove the debris and contaminated soil. Evaluation of post-removal confirmatory samples determined there were no unacceptable human health or ecological risks remaining; therefore, a No Further Action Record of Decision was signed by the Navy and regulatory agencies in 2011.	AOC J Remedial Investigation Report, May 2007 - Volume 1 Volume 2 AOCs J and R and SWMU 7 Record of Decision (English), September 2011 AOCs J and R and SWMU 7 Record of Decision (Spanish), September 2011
AOC K	Former Water Well	AOC K was a former potable water well, used from 1941 to 1979, just northeast of the Public Works Area (Figure 2). The well was plugged and abandoned in 1979 but was rehabilitated in 1997 by the United States Geological Survey (USGS) for its use. The site was investigated during a Preliminary Assessment/Site Inspection. Based on the findings of the Preliminary Assessment/Site Inspection, which indicated the site posed no unacceptable risk to human health or the environment, AOC K was included in a 2006 No Further Action Report for Nine Sites. In 2007, the Puerto Rico Environmental Quality Board concurred with the No Further Action findings.	No Further Action Report for Nine Sites at the Former NASD, October 2006 Puerto Rico Environmental Quality Board Concurrence, February 2007
AOC L	Abandoned Septic Tank	AOC L was an abandoned septic tank and drainage field located north of the Public Works Area (Figure 2). The site was investigated during a Preliminary Assessment/Site Inspection. Based on the findings of the Preliminary Assessment/Site Inspection, which indicated the site posed no unacceptable risk to human health or the environment, AOC L was included in a 2006 No Further Action Report for Nine Sites. In 2007, the Puerto Rico Environmental Quality Board concurred with the No Further Action findings.	No Further Action Report for Nine Sites at the Former NASD, October 2006 Puerto Rico Environmental Quality Board Concurrence, February 2007
AOC R	Former Staging and Operations Area	AOC R (Figure 2) was used for construction staging, public works operations, and vehicle maintenance from approximately 1965 to 1971. This use resulted in the accumulation of several debris piles and associated contaminated soil at the site. Therefore, during the Remedial Investigation, a removal action was conducted in 2009 to remove the debris and contaminated soil. Evaluation of post-removal confirmatory samples determined there were no unacceptable human health or ecological risks remaining; therefore, a No Further Action Record of Decision was signed by the Navy and regulatory agencies in 2011.	AOC R Remedial Investigation Report, February 2011 - Volume 1, Volume 2, Volume 3 AOCs J and R and SWMU 7 Proposed Plan, June 2011 AOCs J and R and SWMU 7 Record of Decision (English), September 2011 AOCs J and R and SWMU 7 Record of Decision (Spanish), September 2011
SWMU 5	Former IRFNA/MAF-4 Disposal Site	SWMU 5 (Figure 2) is the site where, in 1975, a one-time disposal of 7,000 pounds of drone fuel (inhibited red fuming nitric acid/mixed amine fuel #4 [IRFNA/MAF-4]) from a leaking target drone onto the ground reportedly occurred. The site was investigated during a Preliminary Assessment/Site Inspection. Based on the findings of the Preliminary Assessment/Site Inspection, which indicated the site posed no unacceptable risk to human health or the environment, SWMU 5 was included in a 2006 No Further Action Report for Nine Sites. In 2007, the Puerto Rico Environmental Quality Board concurred with the No Further Action findings.	No Further Action Report for Nine Sites at the Former NASD, October 2006 Puerto Rico Environmental Quality Board Concurrence, February 2007
SWMU 10	Former Waste Paint and Solvents Disposal Ground	SWMU 10 was the site where small quantities of paint, solvents, and thinners were reportedly disposed of on the ground within the Public Works Area (Figure 2). The site was investigated during a Preliminary Assessment/Site Inspection. Based on the findings of the Preliminary Assessment/Site Inspection, which indicated the site posed no unacceptable risk to human health or the environment, SWMU 10 was included in a 2006 No Further Action Report for Nine Sites. In 2007, the Puerto Rico Environmental Quality Board concurred with the No Further Action findings.	No Further Action Report for Nine Sites at the Former NASD, October 2006 Puerto Rico Environmental Quality Board Concurrence, February 2007
SWMU 14	Former Wash Rack	SWMU 14 was a former wash rack used for cleaning Navy vehicles within the Public Works Area (Figure 2). The site was investigated during a Preliminary Assessment/Site Inspection. Based on the findings of the Preliminary Assessment/Site Inspection, which indicated the site posed no unacceptable risk to human health or the environment, SWMU 14 was included in a 2006 No Further Action Report for Nine Sites. In 2007, the Puerto Rico Environmental Quality Board concurred with the No Further Action findings.	No Further Action Report for Nine Sites at the Former NASD, October 2006 Puerto Rico Environmental Quality Board Concurrence, February 2007
SWMU 15	Former Waste Transportation Vehicle Parking Area	SWMU 15 was a former waste transportation vehicle parking area within the Public Works Area (Figure 2) where parked trucks may have contained drums that leaked. The site was investigated during a Preliminary Assessment/Site Inspection. Based on the findings of the Preliminary Assessment/Site Inspection, which indicated the site posed no unacceptable risk to human health or the environment, SWMU 15 was included in a 2006 No Further Action Report for Nine Sites. In 2007, the Puerto Rico Environmental Quality Board concurred with the No Further Action findings.	No Further Action Report for Nine Sites at the Former NASD, October 2006 Puerto Rico Environmental Quality Board Concurrence, February 2007

Description of East Vieques Sites

The former Vieques Naval Training Range (VNTR), which comprises approximately 14,600 acres, was used for ground warfare and amphibious training for Marines, naval gunfire support training, and air to ground training. The former VNTR was divided into four separate operational areas, comprising from west to east: the Eastern Maneuver Area (EMA), the Surface Impact Area (SIA), the Live Impact Area (LIA), and the Eastern Conservation Area (ECA) (Figure 3).

Following cessation of military operations on the VNTR, the Navy subdivided the former operational areas into smaller parcels for investigation and cleanup based on considerations such as historic use, geographic features, and current/planned land use. The parcels, referred to as UXO sites, were delineated in such a way to make them more manageable for the purposes of prioritization, munitions removal, site characterization, and decision making (Figures 3 and 4).

On April 30, 2003, the former VNTR was transferred to the DOI to be managed by the USFWS as a National Wildlife Refuge pursuant to Section 1049 of the National Defense Authorization Act for Fiscal Year 2002 (Public Law 107–107). Approximately 900 acres of the former VNTR, consisting of the LIA, is managed as a wilderness area where public access is prohibited in accordance with Public Law 106–398 and Public Law 107–107. As noted previously, on February 11, 2005, Vieques was placed on the NPL, which required all subsequent environmental restoration activities to be conducted under CERCLA.

There are 56 sites on east Vieques, comprising 18 munitions response sites and 38 environmental sites. To date, 36 of the 38 environmental sites are complete with no further action required. In addition, Records of Decision have been finalized for one of the two remaining environmental sites and four of the munitions response sites, their remedies have been implemented, and the sites are under long-term monitoring to monitor site conditions and ensure land use controls remain in place and effective to support the planned land use.

Munitions Response
Site	Name	Description	Relevant Documents
UXO 1	Eastern Conservation Area (ECA)	UXO 1 comprises 133 acres at the easternmost tip of Vieques, adjacent to the LIA (Figure 3). Although UXO 1 was not reportedly used for munitions operations, the site is located adjacent to the LIA (UXOs 2, 3, and 4) where naval gunfire and air-to-ground training activities occurred from the 1970s through 2003. Based on information gathered during historical investigations beginning in 2003 and MEC removal actions conducted between 2005 and 2011, a Remedial Investigation/Feasibility Study was performed in 2011/2012 to assess the nature and extent of munitions and associated contaminants at the site, determine risks to human and ecological (plants and animals) receptors based on anticipated land uses, and evaluate remedial alternatives to address explosive hazards (MEC) potentially remaining at the site. Based on findings and evaluations presented in the 2012 Remedial Investigation Report and the 2012 Feasibility Study Report, a Proposed Remedial Action Plan was issued for public comment in 2014 and a Record of Decision was signed by the Navy and regulatory agencies in November 2015. Because the risk assessments determined there are no unacceptable risks associated with actual and planned use of the site, the selected remedy addresses potential munitions remaining at the site in support of its 1983 designation as a Conservation Area. The remedial action was implemented in 2018, as documented in the 2019 Remedial Action Completion Report. Following implantation of the remedial action in 2018, the site has been under long-term monitoring to monitor site conditions and ensure land use controls remain in place and effective to support Conservation Area land use. Results of site monitoring are summarized in annual reports, the most recent of which was issued in 2023.	UXO 1 Record of Decision (English), November 2015 UXO 1 Record of Decision (Spanish), November 2015 UXO 1 Remedial Action Work Plan, November 2016 UXO 1 Remedial Action Completion Report, August 2019 UXO 1 Annual Status Report, February 2022
UXO 2	Live Impact Area (LIA) Beaches	The LIA comprises the 965-acre area established in 1965 for live-fire training such as ship-to-shore, air-to-ground, and land-based artillery training. UXO 2 consists of 15 beaches, totaling approximately 71 acres within the LIA (Figure 3). As noted previously, the LIA is a designated wilderness area by Federal law. A Beach Dynamics Investigation was performed at and just offshore of 11 former NASD and VNTR beaches, including 6 beaches within the LIA. The investigation objective was to develop an understanding of beach and nearshore changes, and their relationship to the burial and mobility of munitions. Information gathered during the Beach Dynamics Investigation is used to plan further investigations and cleanup of the beaches and nearshore areas. The results of the investigation are included in the 2018 Beach Dynamics Investigation Report. A Remedial Investigation was conducted at LIA beaches to assess the nature and extent of munitions and associated contaminants at the site and to determine risks to human and ecological (plants and animals) receptors based on anticipated land uses. As detailed in the 2020 Remedial Investigation Report, data from samples collected along UXO 2 beaches showed no contamination posing unacceptable risks to human health or the environment. However, information from removal actions being conducted at UXO 2 beaches indicate MEC from past military training may be present. Based on the findings and evaluations presented in the Remedial Investigation Report, a Feasibility Study Report will be prepared that includes evaluation of various remedial alternatives to address potential munitions remaining at the beaches in support of the beaches being part of the designated Wilderness Area. The Feasibility Study will be conducted once the munitions removal actions at the beaches have been sufficiently completed such that the information gathered can be included in the remedial alternatives evaluation.	Beach Dynamics Investigation Report, November 2018 UXOs 2, 7, and 8 (Beaches) Remedial Investigation Report, December 2020
UXO 3	Live Impact Area (LIA) Roads	The LIA comprises the 965-acre area established in 1965 for live-fire training such as ship-to-shore, air-to-ground, and land-based artillery training. UXO 3 consists of approximately 39 acres of roads within the LIA (Figure 3). As noted previously, the LIA is a designated wilderness area by Federal law. A Remedial Investigation was conducted at UXO 3 roads to assess the nature and extent of munitions and associated contaminants at the site and to determine risks to human and ecological (plants and animals) receptors based on anticipated land uses. As detailed in the 2020 Remedial Investigation Report, data from samples collected along UXO 3 roads showed no contamination posing unacceptable risks to human health or the environment. However, information from removal actions being conducted at UXO 3 roads indicate MEC from past military training may be present. Based on the findings and evaluations presented in the Remedial Investigation Report, a Feasibility Study Report will be prepared that includes evaluation of various remedial alternatives to address potential munitions remaining in the roads in support of their use in managing the LIA as a wilderness area. The Feasibility Study will be conducted once the munitions removal actions along the roads have been sufficiently completed such that the information gathered can be included in the remedial alternatives evaluation.	UXOs 3, 5, 6, and 11 (Roads) Remedial Investigation Report, December 2020
UXO 4	Live Impact Area (LIA) Interior	The LIA comprises the 965-acre area established in 1965 for live-fire training such as ship-to-shore, air-to-ground, and land-based artillery training. UXO 4 makes up approximately 855 acres of the LIA and includes all areas except the LIA beaches (UXO 2) and roads (UXO 3), as shown in Figure 3. A Remedial Investigation at UXO 4 was initiated in 2012 and is currently undergoing a time-critical removal action (TCRA) for MEC within the 75-acre submunitions area. Remedial Investigation data gathered to date is documented in the 2016 Remedial Investigation Status Report. The Remedial Investigation will incorporate information gathered during the TCRA into the existing data.	UXOs 4, 9, 10, 12, and 14 Remedial Investigation Status Report, May 2016
UXO 5	Surface Impact Area (SIA) Restricted Roads	The SIA comprises the 2,500-acre area established in the 1950s and 1960s for artillery fire, inert bombing, and strafing. UXO 5 consists of approximately 38 acres of roads within the SIA (Figure 3), some of which are planned for public access as part of USFWS’ Comprehensive Conservation Plan. A Remedial Investigation was conducted at UXO 5 roads to assess the nature and extent of munitions and associated contaminants at the site and to determine risks to human and ecological (plants and animals) receptors based on anticipated land uses. As detailed in the 2020 Remedial Investigation Report, data from samples collected along UXO 5 roads showed no contamination posing unacceptable risks to human health or the environment. However, information from removal actions being conducted at UXO 5 roads indicate MEC from past military training may be present. Based on the findings and evaluations presented in the Remedial Investigation Report, a Feasibility Study Report will be prepared that includes evaluation of various remedial alternatives to address potential munitions remaining in the roads in support of their use in refuge management activities as well as public access in certain areas. The Feasibility Study will be conducted once the munitions removal actions along the roads have been sufficiently completed such that the information gathered can be included in the remedial alternatives evaluation.	UXOs 3, 5, 6, and 11 (Roads) Remedial Investigation Report, December 2020
UXO 6	Eastern Maneuver Area (EMA)/Surface Impact Area (SIA) Planned Public Roads	The SIA comprises the 2,500-acre area established in the 1950s and 1960s for artillery fire, inert bombing, and strafing. The EMA comprises the 11,000-acre area established in 1947 to provide military maneuvering areas and ranges for amphibious landings, small arms fire, artillery and tank fire, shore fire control, and combat engineering training. UXO 6 consists of approximately 62 acres of roads within the SIA and EMA (Figure 3), some of which are planned for public access as part of USFWS’ Comprehensive Conservation Plan. A Remedial Investigation was conducted at UXO 6 roads to assess the nature and extent of munitions and associated contaminants at the site and to determine risks to human and ecological (plants and animals) receptors based on anticipated land uses. As detailed in the 2020 Remedial Investigation Report, data from samples collected along UXO 6 roads showed no contamination posing unacceptable risks to human health or the environment. However, information from removal actions being conducted at UXO 6 roads indicate MEC from past military training may be present. Based on the findings and evaluations presented in the Remedial Investigation Report, a Feasibility Study Report will be prepared that includes evaluation of various remedial alternatives to address potential munitions remaining in the roads in support of their use in refuge management activities as well as public access in certain areas. The Feasibility Study will be conducted once the munitions removal actions along the roads have been sufficiently completed such that the information gathered can be included in the remedial alternatives evaluation.	UXOs 3, 5, 6, and 11 (Roads) Remedial Investigation Report, December 2020
UXO 7	Eastern Maneuver Area (EMA)/Surface Impact Area (SIA) North Beaches	The SIA comprises the 2,500-acre area established in the 1950s and 1960s for artillery fire, inert bombing, and strafing. The EMA comprises the 11,000-acre area established in 1947 to provide military maneuvering areas and ranges for amphibious landings, small arms fire, artillery and tank fire, shore fire control, and combat engineering training. UXO 7 consists of 14 beaches, totaling approximately 54 acres within the SIA and EMA (Figure 3), some of which are planned for public access as part of USFWS’ Comprehensive Conservation Plan. A Beach Dynamics Investigation was performed at and just offshore of 11 former NASD and VNTR beaches, including 2 beaches within the northern EMA and SIA. The investigation objective was to develop an understanding of beach and nearshore changes, and their relationship to the burial and mobility of munitions. Information gathered during the Beach Dynamics Investigation is used to plan further investigations and cleanup of the beaches and nearshore areas. The results of the investigation are included in the 2018 Beach Dynamics Investigation Report. A Remedial Investigation was conducted at northern SIA and EMA beaches to assess the nature and extent of munitions and associated contaminants at the site and to determine risks to human and ecological (plants and animals) receptors based on anticipated land uses. As detailed in the 2020 Remedial Investigation Report, data from samples collected along UXO 7 beaches showed no contamination posing unacceptable risks to human health or the environment. However, information from removal actions being conducted at UXO 7 beaches indicate MEC from past military training may be present. Based on the findings and evaluations presented in the Remedial Investigation Report, a Feasibility Study Report will be prepared that includes evaluation of various remedial alternatives to address potential munitions remaining at the beaches in support of their inclusion in refuge management activities as well as public access to certain beaches. The Feasibility Study will be conducted once the munitions removal actions at the beaches have been sufficiently completed such that the information gathered can be included in the remedial alternatives evaluation.	Beach Dynamics Investigation Report, November 2018 UXOs 2, 7, and 8 (Beaches) Remedial Investigation Report, December 2020
UXO 8	Surface Impact Area (SIA) South Beaches	The SIA comprises the 2,500-acre area established in the 1950s and 1960s for artillery fire, inert bombing, and strafing. UXO 8 consists of nine beaches, totaling approximately 45 acres within the southern part of the SIA (Figure 3), some of which are planned for public access as part of USFWS’ Comprehensive Conservation Plan. A Beach Dynamics Investigation was performed at and just offshore of 11 former NASD and VNTR beaches, including 2 beaches within the southern SIA. The investigation objective was to develop an understanding of beach and nearshore changes, and their relationship to the burial and mobility of munitions. Information gathered during the Beach Dynamics Investigation is used to plan further investigations and cleanup of the beaches and nearshore areas. The results of the investigation are included in the 2018 Beach Dynamics Investigation Report. A Remedial Investigation was conducted at southern SIA beaches to assess the nature and extent of munitions and associated contaminants at the site and to determine risks to human and ecological (plants and animals) receptors based on anticipated land uses. As detailed in the 2020 Remedial Investigation Report, data from samples collected along UXO 8 beaches showed no contamination posing unacceptable risks to human health or the environment. However, information from removal actions being conducted at UXO 8 beaches indicate MEC from past military training may be present. Based on the findings and evaluations presented in the Remedial Investigation Report, a Feasibility Study Report will be prepared that includes evaluation of various remedial alternatives to address potential munitions remaining at the beaches in support of their inclusion in refuge management activities as well as public access to certain beaches. The Feasibility Study will be conducted once the munitions removal actions at the beaches have been sufficiently completed such that the information gathered can be included in the remedial alternatives evaluation.	Beach Dynamics Investigation Report, November 2018 UXOs 2, 7, and 8 (Beaches) Remedial Investigation Report, December 2020
UXO 9	Surface Impact Area (SIA) Exterior	The SIA comprises the 2,500-acre area established in the 1950s and 1960s for artillery fire, inert bombing, and strafing. UXO 9 makes up approximately 953 acres of the SIA, including the northern, southern, and eastern portions of the SIA, but excluding the roads (UXOs 5 and 6), beaches (UXOs 7 and 8), and interior area (UXO 10), as shown in Figure 3. A Remedial Investigation at UXO 9 was initiated in 2012 and is currently undergoing a non-time-critical removal action (NTCRA) for MEC. Remedial Investigation data gathered to date is documented in the 2016 Remedial Investigation Status Report. The Remedial Investigation will incorporate information gathered during the NTCRA into the existing data.	UXOs 4, 9, 10, 12, and 14 Remedial Investigation Status Report, May 2016
UXO 10	Surface Impact Area (SIA) Interior	The SIA comprises the 2,500-acre area established in the 1950s and 1960s for artillery fire, inert bombing, and strafing. UXO 10 makes up the western 890 acres of the SIA (Figure 3). A Remedial Investigation at UXO 10 was initiated in 2012 and is currently undergoing a NTCRA for MEC. Remedial Investigation data gathered to date is documented in the 2016 Remedial Investigation Status Report. The Remedial Investigation will incorporate information gathered during the NTCRA into the existing data.	UXOs 4, 9, 10, 12, and 14 Remedial Investigation Status Report, May 2016
UXO 11	Eastern Maneuver Area (EMA) Planned Public Roads	The EMA comprises the 11,000-acre area established in 1947 to provide military maneuvering areas and ranges for amphibious landings, small arms fire, artillery and tank fire, shore fire control, and combat engineering training. UXO 11 consists of approximately 86 acres of roads through the EMA (Figure 3) some of which are planned for public access as part of USFWS’ Comprehensive Conservation Plan. A Remedial Investigation was conducted at UXO 11 roads to assess the nature and extent of munitions and associated contaminants at the site and to determine risks to human and ecological (plants and animals) receptors based on anticipated land uses. As detailed in the 2020 Remedial Investigation Report, data from samples collected along UXO 11 roads showed no contamination posing unacceptable risks to human health or the environment. However, information from removal actions being conducted at UXO 11 roads indicate MEC from past military training may be present. Based on the findings and evaluations presented in the Remedial Investigation Report, a Feasibility Study Report will be prepared that includes evaluation of various remedial alternatives to address potential munitions remaining in the roads in support of their use in refuge management activities as well as public access in certain areas. The Feasibility Study will be conducted once the munitions removal actions along the roads have been sufficiently completed such that the information gathered can be included in the remedial alternatives evaluation.	UXOs 3, 5, 6, and 11 (Roads) Remedial Investigation Report, December 2020
UXO 12	Eastern Maneuver Area (EMA) Interior	The EMA comprises the 11,000-acre area established in 1947 to provide military maneuvering areas and ranges for amphibious landings, small arms fire, artillery and tank fire, shore fire control, and combat engineering training. UXO 12 makes up approximately 4,465 acres of the interior of the EMA (Figure 3), a portion of which is planned for public access as part of USFWS’ Comprehensive Conservation Plan. Based on information gathered during historical investigations beginning in 2003 and MEC removal actions conducted in 2012/2013, a Remedial Investigation/Feasibility Study was performed between 2012 and 2014 to assess the nature and extent of munitions and associated contaminants at the site, determine risks to human and ecological (plants and animals) receptors based on anticipated land uses, and evaluate remedial alternatives to address explosive hazards (MEC) potentially remaining at the site. Based on findings and evaluations presented in the 2018 Remedial Investigation/Feasibility Study Report, a Proposed Remedial Action Plan was issued for public comment in 2019 and a Record of Decision was signed by the Navy and regulatory agencies in 2021. Because the risk assessments determined there are no unacceptable risks associated with actual and planned use of the site, the selected remedy addresses potential munitions remaining at the site in support of refuge management and public recreational use in portions of the area planned by USFWS. The Remedial Action Work Plan was issued in May 2023, and the remedial action began in June 2023.	UXOs 12 and 14 Remedial Investigation/Feasibility Study, August 2018 UXOs 12 and 14 Proposed Remedial Action Plan, March 2019 UXOs 12 and 14 Record of Decision (English), January 2021 UXOs 12 and 14 Record of Decision (Spanish), January 2021 UXOs 12 and 14 Remedial Action Work Plan, May 2023
UXO 13	Eastern Maneuver Area (EMA) West	The EMA comprises the 11,000-acre area established in 1947 to provide military maneuvering areas and ranges for amphibious landings, small arms fire, artillery and tank fire, shore fire control, and combat engineering training. UXO 13 makes up approximately 1,871 acres in the northwest portion of the EMA (Figure 3), a portion of which is planned for public access as part of USFWS’ Comprehensive Conservation Plan. Based on information gathered during historical investigations beginning in 2003 and a MEC removal action conducted between 2011 and 2015 across multiple ranges and areas of UXO 13, a Remedial Investigation/Feasibility Study was performed for UXO 13, but its completion is currently on hold while additional removal actions for MEC potentially present at the site are being considered. Once all removal actions are completed and the information gathered compiled with historical data, the Remedial Investigation/Feasibility Study Report will be prepared.
UXO 14	Eastern Maneuver Area (EMA) South	The EMA comprises the 11,000-acre area established in 1947 to provide military maneuvering areas and ranges for amphibious landings, small arms fire, artillery and tank fire, shore fire control, and combat engineering training. UXO 14 makes up approximately 1,050 acres in the southern portion of the EMA (Figure 3), a portion of which is planned for public access as part of USFWS’ Comprehensive Conservation Plan. Based on information gathered during historical investigations beginning in 2005, a Remedial Investigation/Feasibility Study was performed between 2012 and 2014 to assess the nature and extent of munitions and associated contaminants at the site, determine risks to human and ecological (plants and animals) receptors based on anticipated land uses, and evaluate remedial alternatives to address explosive hazards (MEC) potentially remaining at the site. Based on findings and evaluations presented in the 2018 Remedial Investigation Report and the Feasibility Study Report, a Proposed Remedial Action Plan was issued for public comment in 2019 and a Record of Decision was signed by the Navy and regulatory agencies in 2021. Because the risk assessments determined there are no unacceptable risks associated with actual and planned use of the site, the selected remedy addresses potential munitions remaining at the site in support of refuge management and public recreational use in portions of the area planned by USFWS. The Remedial Action Work Plan was issued in May 2023, and the remedial action began in June 2023.	UXOs 12 and 14 Remedial Investigation/Feasibility Study Report, August 2018 UXOs 12 and 14 Proposed Remedial Action Plan, March 2019 UXOs 12 and 14 Record of Decision (English), January 2021 UXOs 12 and 14 Record of Decision (Spanish), January 2021 UXOs 12 and 14 Remedial Action Work Plan, May 2023
UXO 15	Puerto Ferro	UXO 15 is a 536-acre peninsula located in the southwestern corner of the former VNTR (Figure 3). Information gathered to date indicates the site was likely used for temporary ordnance storage, transport, and loading/offloading in support of military training activities elsewhere in the VNTR. Based on USFWS’ Comprehensive Conservation Plan, removal actions were performed in 2014, 2015, and 2018 to remove MEC potentially present in areas of planned public use (i.e., access roads, trails, beaches, and area around the historic Spanish Lighthouse). With the information gathered from historical records, removal actions, and investigations, a Remedial Investigation/Feasibility Study Report was prepared in 2020 that described the nature and extent of contamination, documented no unacceptable risks to human and ecological receptors, and evaluated remedial alternatives to address explosive hazards that may remain at the site. Based on findings and evaluations presented in the Remedial Investigation/Feasibility Study Report, a Proposed Remedial Action Plan was issued for public comment by the Navy and regulatory agencies in 2021. The proposed remedy includes MEC clearance in planned public use areas where removal actions have not already taken place and implementation of land use controls. A Record of Decision selected land use controls and MEC removal in planned public use areas not already addressed during previous NTCRAs, was issued in April 2023. The Remedial Action Work Plan is currently being developed with the remedial action anticipated in 2024.	UXO 15 Remedial Investigation/Feasibility Study, July 2020 UXO 15 Proposed Remedial Action Plan, July 2021 UXO 15 Record of Decision (English), April 2023 UXO 15 Record of Decision (Spanish), April 2023
UXO 16	Underwater Areas	UXO 16 comprises approximately 11,500 acres of the waters surrounding the former VNTR and NASD. The 500-acre portion of UXO 16 adjacent to the former NASD is discussed in “Sites Currently in the CERCLA Process – West Vieques” table. The 11,000-acre portion of UXO 16 adjacent to the former VNTR is where munitions may be located due to naval gunfire training or air-to-ground bombing and where the explosive safety arcs from artillery ranges extended offshore. Because of the large size of UXO 16, the area is being subdivided into multiple focus areas for investigation and cleanup. The UXO 16.2 focus area comprises approximately 600 non-contiguous acres adjacent to 29 beaches that are currently open to the public or are being considered for public use. A Remedial Investigation is currently underway within UXO 16.2 to determine the nature and extent of munitions and munitions constituents in the nearshore marine environment. This multi-year Remedial Investigation began in 2022 is being conducted in accordance with the November 2021 UXO 16.2 Remedial Investigation Quality Assurance Project Plan. Information in the 2018 Beach Dynamics Investigation Report, which documents transport and burial mechanisms that may affect underwater munitions, and the 2018 Wide Area Assessment Report, which documents the distribution of potential munitions throughout UXO 16, were used to help plan the Remedial Investigation. While the UXO 16.2 Remedial Investigation is ongoing, investigation planning will be performed for additional focus areas of UXO 16.	UXO 16 Underwater Wide Area Assessment Report, September 2018 Beach Dynamics Investigation Report, November 2018 UXO 16.2 Remedial Investigation Quality Assurance Project Plan, November 2021
UXO 17	Other Sites	UXO 17 consists of five sites located in the southwestern portion of the EMA in the former VNTR (Figures 3 and 4). Two of the sites, Potential Area of Concern (PAOC) EE and Playa Caracas (Red Beach), were used for military training associated with beach landings and are currently in the CERCLA process, as described below. The other three sites (Photo Identified [PI] 14, PI 21, and PAOC FF) were closed out of the CERCLA process with No Action Decision Documents in 2010 (PI 14 and PAOC FF) and 2014 (PI 21). PAOC EE encompasses approximately 129 acres and includes the area in and around Playa La Chiva (Blue Beach) and Punta Conejo (Figure 4). No known historical live-fire activities occurred at the site, but the area was used for amphibious landings and other ship-to-shore activities. Based on information gathered during historical investigations, a TCRA was performed at PAOC EE in 2014 to remove MEC potentially present in areas of existing/planned public use (e.g., parking areas, beach access trails, and Playa La Chiva). With the information gathered from historical records, TCRA, and various investigations, a Remedial Investigation/ Feasibility Study Report was prepared in 2019 that described the nature and extent of contamination, documented no unacceptable risks to human and ecological receptors, and evaluated remedial alternatives to address explosive hazards that may remain at the site. Based on findings and evaluations presented in the Remedial Investigation/ Feasibility Study Report, a Proposed Remedial Action Plan was issued for public comment by the Navy and regulatory agencies in 2022. The proposed remedy includes: (a) MEC clearance in planned public use areas where a removal action has not already taken place, and (b) implementation of land use controls. A Record of Decision for PAOC EE is anticipated to be signed in 2024. Playa Caracas (Red Beach) is located west of Playa La Chiva (Blue Beach) and had a historical military training use similar to Playa La Chiva. Because a single MEC item was found in the subsurface of the parking area at Playa Caracas during a historical investigation, a TCRA was performed at Playa Caracas in 2021 to remove MEC potentially present in public use areas. No additional MEC were found during the TCRA. However, based on the TCRA and historical findings, a Remedial Investigation is planned for Playa Caracas in 2024.	PI 14 and PAOC FF No Action Decision Document, December 2010 PI 21 No Action Decision Document, June 2014 UXO 17 PAOC EE Remedial Investigation/Feasibility Study, June 2019 UXO 17 PAOC EE Proposed Remedial Action Plan, May 2022
UXO 18	Cayo La Chiva	UXO 18 (Cayo La Chiva) is the 12-acre island just offshore of Playa La Chiva (Blue Beach), which is located in the southwestern portion of the EMA in the former VNTR (Figures 3 and 4). The only documented military training activity on Cayo La Chiva was along the northern portion where a 0.50-caliber machine gun nest fired blank rounds during simulated amphibious landings at Playa La Chiva in 1950. However, during various investigations, several MEC (5-inch rockets) were identified both on the island and in the nearshore waters, all of which were subsequently removed. Details of investigations conducted at Cayo La Chiva are documented in the 2015 Remedial Investigation/Feasibility Report and 2016 Feasibility Study Addendum. These reports also document the nature and extent of contamination, results of human health and ecological risk assessments (which determined there are no unacceptable risks associated with human or ecological use of Cayo La Chiva), and evaluation of remedial alternatives to address the potential for MEC to remain at the site. Based on findings and evaluations presented in the Remedial Investigation/ Feasibility Study Report and Feasibility Study Addendum, a Proposed Remedial Action Plan was issued for public comment in 2016 and a Record of Decision was signed by the Navy and regulatory agencies in 2018. The selected remedy, which was implemented in 2019, addresses potential munitions remaining at the site in support of potential public recreational use in portions of the area planned by PRDNER. Since the remedy was implemented in 2019, PRDNER has decided not to open the planned trail and overlook/picnic area for recreational use for the foreseeable future. However, periodic monitoring is performed to ensure an appropriate level of protectiveness for potential visitors to the island. Results of this monitoring are provided in periodic status reports, the most recent of which was issued in February 2022.	UXO 18 Remedial Investigation/Feasibility Study, May 2015 UXO 18 Feasibility Study Addendum, April 2016 UXO 18 Proposed Remedial Action Plan, July 2016 UXO 18 Record of Decision (English), August 2018 UXO 18 Record of Decision (Spanish), August 2018 UXO 18 Remedial Action Work Plan, April 2019 UXO 18 Remedial Action Completion Report, September 2019 UXO 18 Annual Status Report, February 2022

Environmental
Site	Name	Description	Relevant Documents
AOC G	Pump Station and Chlorination Building at Sewage Lagoons	AOC G is the former pump station and chlorination building adjacent to the former sewage treatment lagoons (SWMU 10) (Figure 4). The site consists of a building that housed a pump station and chlorination equipment used in the past for the chlorination of the lagoon system effluent. These facilities were placed into operation in the 1950s but taken out of service in the mid-1970s. Because of this historical use of the site, a Phase I RCRA Facility Investigation and Expanded Site Inspection were conducted in 2004 and 2009, respectively, to determine if there had been contaminant releases at the site. Evaluation of data collected during these investigations indicated there had not been a contaminant release that resulted in soil contamination that poses unacceptable risks to human health or the environment. Therefore, the site was included in a No Action/No Further Action Decision Document issued in 2010. A Site Inspection for PFAS is currently underway at AOC G because PFAS were not historically evaluated there (see “Potential PFAS Areas of Interest (AOIs)” at the bottom of the previous ”Sites Currently in the CERCLA Process” table for additional detail).	No Action/No Further Action Decision Document 7 Consent Order Sites and 14 PI/PAOC Sites, September 2010
PI 5	Former Airfield and Associated Ditches	PI 5 is a surface water drainage from the former runway area south of Camp Garcia (Figure 4). Interviews and records indicate the site was historically the location of the fire department and temporary tents. Beach matting was also observed in the area in the past. No evidence of munitions, hazardous waste, hazardous material, or petroleum storage or disposal was identified at the site and evaluation of aerial photographs indicated the site comprised ditches from the airfield that led to Puerto Ferro. Based on this, a Site Inspection was conducted in 2009 to determine if there had been contaminant releases at the site and transported via the drainage ditches. Evaluation of data collected during the investigation indicated there had not been a contaminant release that resulted in soil contamination that poses unacceptable risks to human health or the environment. Therefore, the site was included in a No Action/No Further Action Decision Document issued in 2010. A Site Inspection for PFAS is currently underway at PI 5 because PFAS were not historically evaluated there (see “Potential PFAS Areas of Interest (AOIs)” at the bottom of the previous ”Sites Currently in the CERCLA Process” table for additional detail).	No Action/No Further Action Decision Document 7 Consent Order Sites and 14 PI/PAOC Sites, September 2010
SWMU 1	Former Camp Garcia Landfill	SWMU 1 was the former Camp Garcia landfill, operated from approximately 1954 to 1978 in an area covering approximately 41 acres east of Camp Garcia (Figure 4), and used for the disposal of municipal-type waste such as paper, corrugated containers, cans and food packaging material, rags, wood, scrap metal, and yard waste. During that time, approximately 1,800 to 3,120 tons of waste was disposed in the landfill; no hazardous materials were reportedly placed in this disposal area. Various investigations were conducted at the landfill, beginning in 1984 and culminating with the 2011 Remedial Investigation/ Feasibility Study. The associated report described the nature and extent of landfilled debris and contamination but determined there were no unacceptable risks to potential human or ecological receptors at the site. However, this determination relied on maintaining a natural vegetative cover on the landfill and controlling access. Based on the findings and evaluations presented in the Streamlined Remedial Investigation/Feasibility Study Report, a Proposed Remedial Action Plan issued for public comment in 2011 and a Record of Decision was signed by the Navy and regulatory agencies in 2011. The selected remedy, as documented in the Record of Decision and associated Explanation of Significant Differences, included removal of surficial debris across the landfill surface, natural vegetative cover, land use controls, and long-term monitoring. The remedy was implemented in two phases in 2013/2014 and 2015/2016, as documented in the 2017 SWMU 1 Remedial Action Completion Report. Long-term monitoring, which includes land use control inspections and groundwater sampling, has been performed annually since 2016 in accordance with the 2016 SWMU 1 Revised Operations and Maintenance, Land Use Control, and Long-term Monitoring Work Plan. Results of monitoring are documented in annual status reports, the most recent of which was issued in November 2021. A Site Inspection for PFAS is currently underway at SWMU 1 because PFAS were not historically evaluated there (see “Potential PFAS Areas of Interest (AOIs)” at the bottom of this table for additional detail).	SWMU 1 Remedial Investigation/Feasibility Study, April 2011 SWMU 1 Record of Decision (English), September 2011 SWMU 1 Record of Decision (Spanish), September 2011 SWMU 1 Record of Decision Explanation of Significant Differences, October 2016 SWMU 1 Revised Work Plan, November 2016 SWMU 1 Remedial Action Completion Report, January 2017 SWMU 1 Annual Status Report, November 2021
SWMU 10	Former Sewage Treatment Lagoons	SWMU 10 is located approximately ½ mile southeast of former Camp Garcia (Figure 4). The domestic sewage treatment lagoons at the site went into service in the early 1950s and consisted of four unlined lagoons. Historically, the raw wastewater discharge to the lagoons originated from the Camp Garcia area. In 1974, after the level of activity and associated domestic wastewater generation rate significantly decreased at Camp Garcia, the treatment lagoons were lined to create a no-discharge system. Because of the historical use of the site, a Phase I Environmental Assessment, Phase I RCRA Facility Investigation, and Expanded Site Inspection were conducted in 2000, 2004, and 2009, respectively, to determine if there had been contaminant releases at the site. Evaluation of data collected during these investigations indicated there had not been a contaminant release that resulted in soil or groundwater contamination that poses unacceptable risks to human health or the environment. Therefore, the site was included in a No Action/No Further Action Decision Document issued in 2010. A Site Inspection for PFAS is currently underway at SWMU 10 because PFAS were not historically evaluated there (see “Potential PFAS Areas of Interest (AOIs)” at the bottom of the previous ”Sites Currently in the CERCLA Process” table for additional detail).	No Action/No Further Action Decision Document 7 Consent Order Sites and 14 PI/PAOC Sites, September 2010
SWMU 20	Former Helicopter Maintenance Area, Trenched Area, Disturbed Area, and Bermed Area used for Fuel Bladder Storage	SWMU 20 (Figure 4), formerly designated PI 4, was the location of former helicopter maintenance area, barracks, mess hall, and associated facilities. The site was part of a 2006 Preliminary Assessment/Site Inspection, a 2009 Expanded Site Inspection, and a 2011 Supplemental Site Inspection during which TCE and associated contaminants were identified in the groundwater. As a result of these findings, a Remedial Investigation was performed in 2013 and 2014 to delineate the nature and extent of contamination and assess potential risks. While no soil contamination was found that poses an unacceptable risk to human health or the environment, an area of TCE concentrations in groundwater above the Federal Maximum Contaminant Level (MCL) of 5 mg/L was delineated. Based on the findings and evaluations in the Remedial Investigation Report, various alternatives to address the TCE groundwater contaminant plume are being evaluated. In addition, a Site Inspection for PFAS is currently underway at SWMU 20 because PFAS were not historically evaluated there (see “Potential PFAS Areas of Interest (AOIs)” at the bottom of this table for additional detail). If the results of the Site Inspection indicate a release of PFAS has occurred at SWMU 20 that warrants remedial action, PFAS will be included in the SWMU 20 Feasibility Study to ensure making a determination of the appropriate remedial action for the site.	SWMU 20 Remedial Investigation Report, August 2016
Potential PFAS Areas of Interest (AOIs)	SWMU 1 SWMU 10 AOC G SWMU 20 PI 5 Camp Garcia Potential Former Motor Pool Area (including Building 340) and Former Fire Department Building 330 Runway south of Camp Garcia	Since the SWMU 1 Record of Decision and the SWMU 10, AOC G, and PI 5 No Further Action Decision Documents were issued, PFAS have been identified nationwide as emerging chemicals of environmental concern. In response, the Navy completed a Preliminary Assessment of PFAS at the former VNTR in 2020 and identified the seven areas of interest (AOIs) listed here to the left where PFAS-containing materials may have been released. A Site Inspection is currently underway for these seven AOIs.	PFAS Preliminary Assessment Report, April 2020 PFAS Site Inspection Sampling and Analysis Plan, December 2021

Munitions Response
Site	Name	Description	Relevant Documents
PAOC FF (Part of UXO 17)	Possible Former Artillery Gun Area	PAOC FF (Figure 4) was originally identified as the possible location of a former artillery gun. However, review of historical aerial photographs indicated the area was not used as a gun position. In fact, the aerial photographs show the only observable feature in the area to be a drainage ditch. Further, the site’s position at the end of the former runway would not have been a reasonable location for a gun placement due to the takeoff and landing of aircraft. Therefore, the site was included in a No Action Decision Document issued in 2010.	PI 14 and PAOC FF No Action Decision Document, December 2010
PI 14 (Part of UXO 17)	Possible Miscellaneous Debris Disposal Area	PI 14 was a debris area just south of the eastern end of the former runway south of Camp Garcia (Figure 4). A site visit during a 2009 Site Inspection identified several debris items, but no evidence of contaminant releases or buried debris. The debris items observed were subsequently removed. Based on this, the site was included in a No Action Decision Document issued in 2010.	PI 14 and PAOC FF No Action Decision Document, December 2010
PI 21 (Part of UXO 17)	Possible Location of a Former Artillery Firing Position	PI 21 (Figure 4) was originally identified as the possible location of a former artillery firing position but review of historical records and multiple site visits identified no evidence of this use. In fact, observations made during the site visits suggest the site was used as rock quarry. Specialized aerial photography identified a vertical tank, pits, disturbed ground, and pits containing discolored liquid. Pits containing discolored liquid were subsequently determined to be just low-lying areas where surface water collected and algae formed. Therefore, the site was included in a No Action Decision Document issued in 2014.	PI 21 No Action Decision Document, June 2014