Attachment 14 P041_FactSheet_Update2021.pdf

Last updated Jan 2021

Fact sheets are a summary provided for convenience. They are not intended as definitive documentation of official status. The Contractor is solely responsible for reviewing all available government furnished information and forming their independent, professional conclusions/interpretations of site conditions and requirements to achieve the Performance Objectives of this contract within Period of Performance specified for each site.

Site History: Solid Waste Management Unit (SWMU) No. P041 is located in the industr ial area (see site map, below) of Patr ick Air Force Base (PAFB). The investigation began at Building 313 and, in the process of following the groundwater plume upgradient, high levels of contamination in the vicinity of Building 533 were discovered. In reality, each facility represents a separate source of contamination, but since the plumes are co-mingled and the sources are reasonably close to one another, the investigation was expanded to include both areas. Building 313 is currently used as a maintenance hangar and Building 533 is a communications building.

Metal plating operations were performed at several locations in Building 313 between the mid-1940’s and 1983, resulting in industrial solvents and metal contamination.

Building 533 was constructed in 1959 and housed the base communications operations including a teletype maintenance shop, radio maintenance shop, and telephone outside plant shop. All three of these shops reportedly used solvents in day-to-day operations. Additionally, historical blueprints indicate that several laboratories were formally located on the Building 533 site.

Environmental Media and Contaminants:

Groundwater: Known contaminants include residual industr ial solvents. Concentrations of the contaminants are above regulatory cleanup levels - a ground-water monitoring program is on-going. Several different treatment actions have been undertaken over the years on the source area and downgradient hotspots.

Surface Water: No known contaminants have been identified in surface water .

Sediment: No known contaminants have been identified in sediment.

Soil: Several metals in subsur face soil samples were found to exceed residential cleanup standards and/or leachability standards. Land use controls have been implemented to ensure that the residual soil contamination does not adversely impact human health or the environment.

Corrective Action Summary: In accordance with the U.S. Environmental Protection Agency’s Resource Conservation and Recovery Act (RCRA), a Site Investigation (SI) was completed in 1994. Based on SI results, a RCRA Facility Investigation (RFI) was conducted to fully evaluate the nature and extent of contamination at the site and to assess the human health and ecological risk posed by site contaminants. The RFI was completed in 1998 and recommended that a Corrective Measures Study (CMS) be completed to determine the most appropriate remedy for groundwater contamination at the site. Studies have indicated that Dense Non-Aqueous Phase Liquids (DNAPLs) are present in the subsurface. The DNAPLs are believed to result from industrial solvent use and are a continuing source of groundwater contamination. The CMS was completed in 2002 and recommended bioremediation to promote degradation of the solvents in the subsurface. Field technology tests were conducted on cyclodextrin injection. The technology results were inconclusive. Based on the potential for contaminant mobilization that could be caused by cyclodextrin, injection of vegetable oil and emulsified zero valent iron (EZVI) was selected as the remedy. The Corrective Measures Design (CMD) was finalized in April 2004 and a Statement of Basis was drafted.

Source area groundwater treatment was completed over several events between 2005 and 2008. EZVI (60,100 gallons), vegetable oil (VO) (49,600 gallons), and KB-1 (683 liters) were injected into the groundwater treatment area. EZVI is a non-hazardous, non-toxic oil-in-water emulsion that delivers iron particles into contact with the chlorinated solvent residuals, whereupon instantaneous dechlorination occurs and the contaminants are reduced to harmless ethene. KB-1 is a patented line of bacterium with a demonstrated potential to dechlorinate trichloroethene and its daughter products. VO provides a carbon source for microbial growth. Performance monitoring has been on-going since the initial injections were completed in 2005. Long term monitoring/monitored natural attenuation (LTM/MNA) was initiated on the groundwater plume as a whole to track the continued natural decline of residual contaminants. Additional VO treatment of a downgradient “hotspot” was performed in 2012.

As of 2013, chlorinated solvent contamination in the nearby Former Facility 316 Area (SWMU No. P128) was combined into the OT030 monitoring program. This was appropriate for several reasons, including: the proximity of the sites, the similarity of the contaminants, and the limited extent of contamination in the Facility 316 Area (Refer to the P128 Fact Sheet for details on assessments in the Facility 316 Area).

A 2017 Site Investigation (SI) documents PFOS/PFOA in groundwater at the site at levels exceeding the EPA drinking water “lifetime health advisory”; however, groundwater at the site is not employed as a drinking water source.

Future Actions: Groundwater LTM will continue until all residual contaminant concentrations are below cleanup cr iter ia. Land use controls will be maintained on both soil and groundwater to ensure that contaminant residuals do not cause any adverse impacts to human health or the environment. As of 2013, chlorinated solvent contamination in the nearby Former Facility 316 Area (SWMU No. P128) will be combined into the OT030 monitoring program. This was appropriate for several reasons, including: the proximity of the sites, the similarity of the contaminants, and the limited extent of contamination in the Facility 316 Area.

(Refer to the P128 Fact Sheet for details on assessments in the Facility 316 Area). The recent Optimization Report and Five Year Review included optimization recommendations. As MNA continues, other assessment may be considered to evaluate any remaining hotspots or groundwater data gaps and to determine whether other future treatment or changes to the monitoring program may be warranted. Additional PFOS/PFOA assessment are planned under CERCLA on a stand-alone contract.

This work is being prioritized against sites across the Air Force inventory.

UNITED STATES AIR FORCE

45TH SPACE WING

Fact Sheet For: PLATING SHOP, BUILDINGS 313/533, SWMU NO. P041

INSTALLATION RESTORATION PROGRAM– SITE OT030

PATRICK AIR FORCE BASE, FLORIDA

Current Status: LONG TERM MONITORING/MONITORED NATURAL ATTENUATION ON

GROUNDWATER PLUME ON-GOING;

LAND USE CONTROLS BEING MAINTAINED;

PERFLUORINATED COMPOUNDS ARE PRESENT IN GROUNDWATER

Last updated Jan 2021

Fact sheets are a summary provided for convenience. They are not intended as definitive documentation of official status. The Contractor is solely responsible for reviewing all available government furnished information and forming their independent, professional conclusions/interpretations of site conditions and requirements to achieve the Performance Objectives of this contract within Period of Performance specified for each site.

The parking lot in this photo is underlain by the plume from SWMU No. P041. This pho-to was taken facing northward, from the south side of the parking lot located at the corner of Saturn Road and Falcon Avenue. This parking lot is located west of Building 533

This photo of Hangar 313 was taken facing southwest, from the corner of Challenger Street and Spacelift Avenue.

Approximate location of the former plating shop.

This photo shows preparations for the injection of EZVI into the DNAPL source area that underlies the parking lot west of Building 533. Photo was taken from northeast corner of parking lot, looking southwest.

Site Investigation (Confirmation Sampling)

RCRA Facility Investigation

Corrective Measures Study

Corrective Measure Design

Statement of Basis

Corrective Measure Implementation (EZVI, VO, and KB-1 Injection

Land Use Controls and LTM/MNA on

Remaining Groundwater Plume

IRP Process Flow Chart SWMU No. P041 (Buildings 313/533, Plating Shop, PAFB)

Interim Measure (Tank and soil removal)

Interim Measure (Tank removal)

Integration of Fac 316 Area with OT030 monitoring program (2013)

Interim Measure (Hotspot vegetable oil injection) 2013

Known Legacy Contaminants PFOS/PFOA

Preliminary Assessment/ Site Inspection

Remedial Investigation Timeframe to be determined