FINAL

Preliminary Assessment Report

Brooksville Readiness Center / 

AASF #2

Spring Hill, Florida

Perfluorooctanesulfonic Acid (PFOS) and Perfluorooctanoic 

Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

August 2020

Prepared for:

Army National Guard Bureau

111 S. George Mason Drive

Arlington, VA 22204
PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

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Table of Contents

Executive Summary .................................................................................................................... 1

1. Introduction ........................................................................................................................ 4

1.1 Authority and Purpose .............................................................................................. 4

1.2 Preliminary Assessment Methods ............................................................................. 4

1.3 Report Organization .................................................................................................. 5

1.4 Facility Location and Description............................................................................... 5

1.5 Facility Environmental Setting ................................................................................... 5

1.5.1 Geology ......................................................................................................... 6

1.5.2 Hydrogeology ................................................................................................. 6

1.5.3 Hydrology ....................................................................................................... 7

1.5.4 Climate ........................................................................................................... 7

1.5.5 Current and Future Land Use ......................................................................... 8

2. Fire Training Areas ........................................................................................................... 12

3. Non-Fire Training Areas ................................................................................................... 13

3.1 Wash Rack Area ..................................................................................................... 13

3.2 AFFF Spill Area ....................................................................................................... 13

3.3 AASF #2 Hangar ..................................................................................................... 13

3.4 C-23 Hangar ........................................................................................................... 13

4. Emergency Response Areas ............................................................................................ 16

5. Adjacent Sources ............................................................................................................. 17

5.1 Brooksville – Tampa Bay Regional Airport ............................................................... 17

6. Preliminary Conceptual Site Model .................................................................................. 19

7. Conclusions ..................................................................................................................... 22

7.1 Findings .................................................................................................................. 22

7.2 Uncertainties ........................................................................................................... 22

7.3 Potential Future Actions .......................................................................................... 23

8. References ...................................................................................................................... 25
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Figures

Figure ES-1 Summary of Findings

Figure ES-2 Conceptual Site Model, Brooksville Readiness Center

Figure 1-1 Facility Location

Figure 1-2 Groundwater Features

Figure 1-3 Surface Water Features

Figure 3-1 Non-Fire Training Areas

Figure 5-1 Adjacent Sources

Figure 6-1 Areas of Interest

Figure 6-2 Conceptual Site Model, AOI 1 Wash Rack Area / AOI 2 AFFF Spill Area

Figure 7-1 Summary of Findings

Tables

Table 7-1: AOIs at Brooksville RC

Table 7-2: No Suspected Release Areas

Table 7-3: Uncertainties within the PA

Table 7-4: Rationale

Appendices

Appendix A Data Resources

Appendix B Preliminary Assessment Documentation

B.1 Interview Records

B.2 Visual Site Inspection Checklists

B.3 Conceptual Site Model Information

Appendix C Photographic Log
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Acronyms and Abbreviations

°F degrees Fahrenheit

AASF Army Aviation Support Facility

AECOM AECOM Technical Services, Inc.

AFFF aqueous film forming foam

AOI area of interest

ARNG Army National Guard

Brooksville RC Brooksville Readiness Center/Army Aviation Support Facility #2

CERCLA Comprehensive Environmental Response, Compensation, and Liability

Act

CFR Code of Federal Regulations

CSM conceptual site model

EDR Environmental Data Resource

FEMA Federal Emergency Management Agency

FL Florida

FLARNG Florida Army National Guard

FTA fire training area

gpm gallons per minute

NGWA National Ground Water Association

PA Preliminary Assessment

PFAS per- and poly-fluoroalkyl substances

PFOA perfluorooctanoic acid

PFOS perfluorooctanesulfonic acid

RC Readiness Center

SI Site inspection

US United States

USACE United States Army Corps of Engineers

USEPA United States Environmental Protection Agency

VSI visual site inspection
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Executive Summary

The United States (US) Army Corps of Engineers (USACE) Baltimore District on behalf of the

Army National Guard (ARNG) G9, Cleanup Branch contracted AECOM Technical Services, Inc.

(AECOM) to perform Preliminary Assessments (PAs) and Site Inspections (SIs) for

Perfluorooctanesulfonic acid (PFOS) and Perfluorooctanoic acid (PFOA) Impacted Sites at ARNG

Facilities Nationwide. The ARNG is assessing potential effects on human health related to

processes at facilities that used per- and poly-fluoroalkyl substances (PFAS) (a suite of related

chemicals), primarily in the form of aqueous film forming foam (AFFF) released during firefighting

activities or training, although other PFAS sources are possible.

AECOM completed a PA for PFAS at Brooksville Readiness Center (RC)/Army Aviation Support

Facility (AASF) #2 (also referred to as “Brooksville RC”) in Spring Hill, Florida (FL), to assess

potential PFAS release areas and exposure pathways to receptors.

The performance of this PA included the following tasks:

· Reviewed data resources to obtain information relevant to suspected PFAS releases

· Conducted a 1-day site visit on 4 February 2019.

· Interviewed current Brooksville RC personnel during the site visit including Florida ARNG

(FLARNG) operations staff and Hernando County Station No. 14 Fire Chief.

· Completed visual site inspections (VSIs) at known or suspected PFAS release locations and

documented with photographs

· Developed a conceptual site model (CSM) to outline the potential release, pathway, and

receptors of PFAS for Brooksville RC.

Two Areas of Interest (AOIs) related to potential PFAS releases were identified at Brooksville RC

during the PA. The AOIs are shown on Figure ES-1 and described in Table ES-1 below:

Table ES- 1: AOIs at Brooksville RC/AASF#2

Area of Interest Name Used by Potential Release Dates

AOI 1 Wash Rack Area FLARNG 2007 - 2008

AOI 2 AFFF Spill Area FLARNG 2002 - 2003

Based on documented potential PFAS releases at these AOIs, there is potential for exposure to

PFAS contamination in media at or near the facility. The CSM for Brooksville RC, which presents

the potential receptors and media impacted, is shown on Figure ES-2. Based on the third

Unregulated Contaminant Monitoring Rule (UCMR3) data, it was indicated that there were no

detections above USEPA Health Advisory levels in public water systems within 20 miles of the

facility.
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Summary o f Findings

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AOI 2

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Media

SOURCE PATHWAY RE

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TriMaxTM Unit 

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Accidental Spill

PFAS in 

Surface Soil

Human 

Activities

Leaching/Infiltration

Precipitation

/ 

Run-Off

Airborne Soil 

Particulate

Surface Soil 

at AOI

Shallow 

Groundwater

Surface 

Water/ 

Sediment

Subsurface 

soil

Source Release Mechanism Media Transport and Migration Media Exposure Routes

Inhalation of 

Dust

Ingestion

Ingestion

Ingestion

Ingestion

Hum

C

Flow-Chart ContinuesPartial / Possible FlowFlow-Chart StopsIncomplete PathwayPotentially Complete PathwayComplete Pathway

Site 

Worker

Cons

Wo

Site 

Worker

Cons

W

LEGEND

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Preliminary Concep

Brooksville Readiness

Potential 

Off-Facility 

Source Not 

under 

Control of 

ARNG

/ 

/ 

/ 
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1. Introduction

1.1 Authority and Purpose

The United States (US) Army Corps of Engineers (USACE) Baltimore District on behalf of the

Army National Guard (ARNG) G9, Cleanup Branch contracted AECOM Technical Services, Inc.

(AECOM) to perform Preliminary Assessments (PAs) and Site Inspections (SIs) for

Perfluorooctanesulfonic acid (PFOS) and Perfluorooctanoic acid (PFOA) Impacted Sites at ARNG

Facilities Nationwide under Contract Number W912DR-12-D-0014, Task Order

W912DR17F0192, issued 11 August 2017, and Modification 01 issued 30 September 2017. The

ARNG is assessing potential effects on human health related to processes at their facilities that

used per- and poly-fluoroalkyl substances (PFAS) (a suite of related chemicals), primarily

releases of aqueous film forming foam (AFFF) although other sources of PFAS are possible. In

addition, the ARNG is assessing businesses or operations adjacent to the ARNG facility (not

under the control of ARNG) that could potentially be responsible for a PFAS release.

PFAS are classified as emerging environmental contaminants that are garnering increasing

regulatory interest due to their potential risks to human health and the environment. PFAS

formulations contain highly diverse mixtures of compounds. Thus, the fate of these PFAS

compounds in the environment will vary. The regulatory framework at both federal and state levels

continues to evolve. The US Environmental Protection Agency (USEPA) issued Drinking Water

Health Advisories for PFOA and PFOS in May 2016, but there are currently no promulgated

national standards regulating PFAS in drinking water.

This report presents findings of a PA for PFAS at Brooksville Readiness Center (RC)/Army

Aviation Support Facility (AASF) #2 (also referred to as Brooksville RC) in Spring Hill, FL, in

accordance with the Comprehensive Environmental Response, Compensation, and Liability Act

(CERCLA), as amended, the National Oil and Hazardous Substances Pollution Contingency Plan

(40 Code of Federal Regulations [CFR] Part 300), and USACE requirements and guidance.

This PA documents the known fire training areas (FTAs) as well as additional locations where

PFAS may have been released into the environment at Brooksville RC. The term PFAS will be

used throughout this report to encompass all PFAS chemicals being evaluated, including PFOS

and PFOA, which are key components of AFFF.

1.2 Preliminary Assessment Methods

The performance of this PA included the following tasks:

· Reviewed data resources to obtain information relevant to suspected PFAS releases

· Conducted a 1-day site visit on 4 February 2019

· Interviewed current Brooksville RC personnel during the site visit including Florida Army

National Guard (FLARNG) operations staff and Hernando County Station No. 14 Fire Chief

· Completed visual site inspections (VSI) at known or suspected PFAS release locations and

documented with photographs

· Developed a conceptual site model (CSM) to outline the potential release and pathway of

PFAS for each area of interest (AOI)
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1.3 Report Organization

This report has been prepared in accordance with the USEPA Guidance for Performing

Preliminary Assessments under CERCLA (USEPA 1991). The report sections and descriptions of

each are:

· Section 1 – Introduction: identifies the project purpose and authority and describes the

facility location, environmental setting, and methods used to complete the PA.

· Section 2 – Fire Training Areas: describes the FTAs at the facility identified during the site

visit.

· Section 3 – Non-Fire Training Areas: describes other locations of potential PFAS releases

at the facility identified during the site visit.

· Section 4 – Emergency Response Areas: describes areas of potential PFAS release at the

facility, specifically in response to emergency situations.

· Section 5 – Adjacent Sources: describes sources of potential PFAS release adjacent to the

facility that are not under the control of ARNG.

· Section 6 – Conceptual Site Model: describes the pathways of PFAS transport and

receptors at each AOI.

· Section 7 – Conclusions: summarizes the data findings and presents the conclusions of the

PA.

· Section 8 – References: provides the references used to develop this document.

· Appendix A – Data Resources

· Appendix B – Preliminary Assessment Documentation

· Appendix C – Photographic Log

1.4 Facility Location and Description

Brooksville RC is located at 16386 Spring Hill Drive, Spring Hill, Florida in Hernando County in

western central Florida and borders the Brooksville – Tampa Bay Regional Airport to the south.

(Figure 1-1).

Brooksville RC is an FLARNG aviation maintenance facility for helicopters. Impervious surfaces

made up of roadways, parking lots, helipads, and taxi lanes. Physical structures include two

hangars, wash rack, equipment storage areas, and cantonment areas with dining facilities. Based

on Interviewee knowledge dating back to 2001, the hangar facility was constructed March 2001.

Aerial photos from the Environmental Data Resource (EDR) Reports show only an armory within

the property boundaries from 1995 to 1998. Prior to 1995, the property boundary remained

undeveloped.

1.5 Facility Environmental Setting

Brooksville RC resides within Hernando County. Hernando County can be divided into four

general parts based on physiography: the coastal swamps, the Gulf Coastal Lowlands,

Brooksville Ridge, and Tsala Apopka Plain. Brooksville RC is within the Gulf Coastal Lowlands,

southwest of the Brooksville Ridge and situated between the Weeki Wachi and Withlacoochee

Rivers. This area is not continuous throughout the length of the county and ranges from less than

a mile to about 2 miles in width. Elevations are mostly between about 10 and 50 feet above sea

level. The area consists mostly of pine and palmetto flatwoods with numerous small ponds in
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smaller areas of broad, grassy sloughs. The soils are predominantly nearly level, wet, and sandy.

The sandy subsoil is weakly cemented with organic matter (Hyde, 1975).

1.5.1 Geology

Pasco and Hernando Counties are underlain by several thousand feet of sedimentary rocks,

primarily limestones. Geological formation ages for Paso and Hernando counties include Eocene,

Oligocene, Miocene, and Pleistocene Series.

The Eocene age formations include Lake City Limestone, Avon Park Limestone, Inglis Formation,

Williston Formation, and the Crystal River Formation. The Lake City and Avon Park Limestone

lithology consists of soft to hard, fossiliferous, brown limestone with dark brown beds of dolomitic

limestone at irregular intervals, which contains more sulfate than water from overlying formations.

Thickness of the Avon Park Limestone in the area ranges from 50 to about 500 feet. The dolomitic

zone about 100 feet below the top of the formation is highly permeable and yields large quantities

of water to surrounding wells. The Inglis Formation lithology consists of brown to gray,

fossiliferous, hard dolomitic limestone, overlies the Avon Park Limestone, and attains a thickness

of 40 to 60 feet. The formation is highly permeable over the area and yields large quantities of

water to wells. Wells that produce more than 1,000 gallons per minute (gpm) generally penetrate

the Inglis Formation. The Inglis Formation is overlain by the Williston Formation, which is overlain

by the Crystal River Formation. The Crystal River and Williston Formations exhibit similar

lithologic and hydrologic formations. Lithologically, the formations are generally white to tan, soft

chalky, coquinoid limestones. The formations attain a thickness of 100 to 150 feet and are not an

important source of water in the area.

The Oligocene Series Formation include the Suwannee Limestone, which overlies the Crystal

River Formation. Lithology in this formation is generally white to yellow, fine-grained, fossiliferous

limestone. Lower parts of the formation are harder, denser, and less fossiliferous than the upper

part. The Suwannee Limestone is a very permeable, productive aquifer. Most domestic and many

irrigation wells produce from the lower part of the Suwannee Limestone.

The Miocene Series Formation include the Hawthorn Group and Tampa Limestone, which overlies

the Suwannee Limestone. Lithology in this formation is a white to gray, sandy, fossiliferous

limestone. Thickness of the formation in the area is erratic due to irregular erosional surfaces.

The Tampa Limestone is not a major source of water in Pasco and Hernando counties. (Wetterhall

1964). The Hawthorn Group is thin and discontinuous in the south, and generally absent toward

the north, except for a few erosional remnants associated with the ridges. The limestone units

beneath the clastic deposits of the Cypress head Formation and the Hawthorn Group in this region

can include the Suwannee Limestone of Oligocene age and Ocala Limestone and Avon Park

Formation of Eocene age (Trommer 2009).

The Pleistocene Series formation include undifferentiated deposits of sand and clay that overlie

the Tampa Limestone. These sediments consist of interbedded sands and clays that reach a

maximum thickness of 250 feet. A few domestic wells produce water from the sand. The water

generally contains iron and are likely to be highly colored (Wetterhall 1964).

1.5.2 Hydrogeology

The principal hydrogeologic units within the watershed from shallow to deep are the surficial

aquifer, the intermediate confining unit, the Upper Floridan aquifer, middle confining unit, and the

Lower Floridan aquifer. The discussion below focuses on the uppermost aquifer, as it is the most

likely to be affected by PFAS releases.
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The surficial aquifer consists of unconsolidated clastic sediments of sand, clayey sand, and

organic debris. This unit is referred to as the surficial aquifer system where more than one

permeable unit is present or where these units are interbedded. The thickness of the aquifer is

variable generally, surficial deposits are thinnest near the river and thickest toward the ridges.

Where low permeability clays of the Hawthorn Group separate the limestone and sand, a water

table may develop within the sands. Along the Withlacoochee River, the surficial aquifer is

generally thin to nonexistent, and the Upper Floridan aquifer is exposed along much of the river

channel. The surficial aquifer is not a substantial source of water supply in the Withlacoochee

River watershed. However, where present, the surficial aquifer does provide a source of water

that flows to streams and recharges the Upper Floridan aquifer either by downward vertical

leakage through the confining unit (Miocene siliclastic sediments of interbedded sand, clay,

limestone, sandy phosphatic limestone, and marl), or directly through breaches in the confining

unit (Trommer 2009).

Recharge to the surficial aquifer is through infiltration of streamflow, precipitation, and leakage

from Withlacoochee River. Locally at Brooksville RC, the groundwater flow direction is

predominantly to the southeast (Figure 1-2). There are two public supply wells within a 1-mile

radius of the facility, upgradient of the inferred groundwater flow. Several public supply and private

wells exist approximately 2.28 miles downgradient of the facility. Drinking water for the facility is

provided by Hernando County Utilities. Based on the USEPA Unregulated Contaminant

Monitoring Rule 3 data, it was indicated that no PFAS was detected in a public water system

above the USEPA Health Advisory level within 20 miles of the facility.

1.5.3 Hydrology

Brooksville RC sits within the Crews Lake Watershed, with Weeki Wachi Drain Watershed to the

northwest and the Hancock Lake Watershed to the Southeast (Figure 1-3). The Crews Lake

Outlet (Pithlachascotee River) Watershed is located in western Florida, in southern Hernando and

Pasco counties. The combined watershed covers an area of approximately 171 square miles. The

Weeki Wachi Prairie Watershed is approximately 11.2 square miles and is located in southwest

Hernando County. A majority of the watershed lies within the unincorporated area of Hernando

County. A small portion of the watershed projects south into Pasco County. The watershed is

predominantly developed, consisting of mostly residential and some commercial and vacant

lands. The area at the south end of the watershed, near Quality Drive, is rapidly developing with

predominantly commercial land uses (Federal Emergency Management Agency 2012). There are

no surface water intakes for drinking water near the facility.

1.5.4 Climate

Brooksville Florida has highest average temperatures in July and August, at 91 degrees

Fahrenheit (°F) and 90°F, respectively. The greatest mean monthly precipitation occurs in August.

The average annual precipitation is 52.52 inches (U.S. Climate Data 2019).

The climate of west-central Florida is characterized as humid southern temperate to subtropical,

with frost and freezing temperatures occurring at least once a year. Local weather patterns are

strongly influenced by the Gulf of Mexico, which moderates winter and summer temperatures.

Based on data available from long-term rainfall gaging stations in Pasco and Hernando counties,

rainfall was typically highest during the months of June through September, likely associated with

convective and tropical storms that occur during the wet season months. Evapotranspiration for

the area has been reported at approximately 39 inches per year and annual evaporation rates of

47 to 59 inches are reported for shallow, central Florida lakes (Southwest Florida Water

Management District 2016).
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1.5.5 Current and Future Land Use

Brooksville RC serves as an FLARNG aviation maintenance facility for helicopters. FLARNG has

operated the readiness center since 2001. Lease documents were requested but not available.

The facility includes maintenance hangars, various storage buildings, and related infrastructure

including parking lots, aircraft parking areas, wash rack. The facility is categorized as a

conditionally exempt small-quantity hazardous waste generator, because is manages a variety of

hazardous materials. Reasonably anticipated future land use it not expected to change from the

current land use described above. Land use near the facility consists of rural, residential,

recreational, and commercial.
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Groundwater Features

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2. Fire Training Areas

Through Environmental Data Resource Reports and interviews with Brooksville RC personnel

who had knowledge dating back to 2001, no FTAs were identified within the Brooksville RC facility

during the PA. Training for Brooksville RC involving AFFF use was conducted offsite with

simulated foam in partnership with Hernando County Fire Station No. 14. Interview records

appear in Appendix B.
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3. Non-Fire Training Areas

Several non-FTAs where PFAS was potentially released were identified during the PA. A

description of each non-FTA is presented below, and the non-FTAs are shown on Figure 3-1.

Interview records appear in Appendix B. Photographs appear in Appendix C.

3.1 Wash Rack Area

The wash rack area is located on the northwestern portion of the property (Figure 3-1). The

geographic coordinates are 28°28'44.31"N; 82°27'20.55"W. According to interviewees and

records, annual nozzle testing of the TriMaxTM units was conducted at the wash rack in January

2007 and February 2008. The unit tanks were emptied and discharged on the wash rack area.

The wash rack drained to an oil/water separator, which then discharges to the sanitary sewer.

Four TriMaxTM units containing 30 gallons of 3% AFFF were located at the facility. Shortly after

the February annual testing, the units were decommissioned and removed from the site.

Photograph 11 of the spill area appears in Appendix C.

3.2 AFFF Spill Area

The AASF #2 hangar is equipped with an AFFF fire suppression system. Interviewees indicated

sometime between 2002-2003, during the installation of the fire suppression system by Cox Fire

Protection, Inc., 3% AFFF diluted with water was spilled out of the fire suppression tank room

(Figure 3-1). The geographic coordinates of the AFFF spill area are 28°28'44.96"N;

82°27'16.06"W. The spill was approximately 5 gallons that flowed onto the pavement behind the

building and into the grassy area in the adjacent parking lot but did not reach the parking lot itself

(see Photographs 8 and 9 in Appendix C).

3.3 AASF #2 Hangar

AASF #2 hangar is centrally located within the Brooksville RC boundary (Figure 3-1). The

geographic coordinates are 28°28'44.35"N; 82°27'16.25"W. The hanger was previously equipped

with four TriMaxTM 30 foam fire extinguishers in the corners of the hangar. Testing of the TriMaxTM

units was conducted in the Wash Rack area as discussed in Section 3.1. In 2001 the hangar was

outfitted with a fire suppression system supplied by two 900-gallon AFFF tanks (Photographs 5

through 7, and 10). During the site visit, it was observed that approximately 135 gallons of Ansulite

AFFF concentrate for 3% proportioning on reserve were stored in a combination of 5-gallon

buckets and 55-gallon drums. Interviewees stated no leaks had been reported, and no signs of

leaks from the piping system were observed during the site visit. Interviewees also indicated the

AFFF fire suppression system in the hangar has not been tested or used due to water pressure

constraints in the area. Currently, a water supply line from the municipality in combination with a

water supply line from the Brooksville – Tampa Bay Regional Airport are unable to pressurize the

system. An AFFF spill occurred just outside the fire suppression system room in the north portion

of the hangar as described in Section 3.2.

3.4 C-23 Hangar

C-23 hangar is located on the west side of Brooksville RC. The geographic coordinates are

28°28'43.95"N; 82°27'24.16"W. The hangar is used for maintenance and is outfitted with a water

fire suppression system. A “firetruck” has been stored outside of the C-23 hangar (Photograph

4). The “truck” is a metal cart with wheels that contains a mechanical suppression/pump system.

Interviewees state the “truck” has not been filled with AFFF and has never been used. During the
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site visit, ABC Dry chemical extinguishers were found in the C-23 hangar. A potential PFAS

release to the environment at the C-23 Hangar is not suspected.
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4. Emergency Response Areas

Through interviews with FLARNG personnel whose knowledge covers 2001 to present and review

of Environmental Data Resource Reports, no emergency response areas were identified within

the Brooksville RC facility during the PA. All emergency services for the current Brooksville RC

are provided by the Hernando County Fire Department. Interview records appear in Appendix B.
PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

17

5. Adjacent Sources

One potential off-facility source of PFAS contamination was identified during the PA. The offfacility source is shown on Figure 5-1.

5.1 Brooksville – Tampa Bay Regional Airport

The Brooksville – Tampa Bay Regional Airport is adjacent to the south of Brooksville RC. The

geographic coordinates are 28°28'12.09"N; 82°27'25.57"W. Hernando County Fire Chief of

Station No. 14 stated annual training with Brooksville RC personnel is conducted in the airport

airfield. Dish washing foams are used for the simulations and training purposes. No AFFF has

been used on emergency responses at the airport to the interviewee’s knowledge dating back to

2001. Hernando County Fire Chief stated AFFF is stored at Fire Station No. 14. Information of

AFFF storage at Brooksville – Tampa Bay Regional Airport is unknown. Information of AFFF use

prior to 2001 at Brooksville – Tampa Bay Regional Airport is unknown. Because it is outside the

boundary of Brooksville RC, the Brooksville – Tampa Bay Regional Airport is considered an

adjacent potential source of PFAS.
Brooksville – Tampa Bay Regional Airport

CLIENT

REVISED

SCALE

ARNG

GIS BY

CHK BY

MS

MG

5/6/2019

5/6/2019

NOTES Preliminary Assessment for PFAS at Brooksville Readiness Center, FL

1:16,800

5/6/2019 ­ Figure 5-1 PM RG 5/6/2019

Q:\Projects\ENV\GEARS\GEO\ARNG PFAS\900-CAD-GIS\920-GIS or Graphics\MXD\FL\Brooksville_RC\Fig_5-1_Brooksville_RC_Adjacent_Sources.mxd

12420 Milestone Center Drive

Germantown, MD 20876

Adjacent Source

0 700 1,400 2,800

Feet

Legend

Potential PFAS Release

Facility Boundary

Water Body

Wetland

Base Map: Source: Esri, DigitalGlobe,

GeoEye, Earthstar Geographics,

18
PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

19

6. Preliminary Conceptual Site Model

Based on the PA findings, the two distinct potential release areas were identified as AOIs: AOI 1

Wash Rack Area and AOI 2 AFFF Spill Area. The AOI locations are shown on Figure 6-1. The

following sections describe the CSM components and the specific CSMs developed for each AOI.

The CSM identifies the three components necessary for a potentially complete exposure pathway:

(1) source, (2) pathway, (3) receptor. If any of these elements are missing, the pathway is

considered incomplete.

In general, the potential PFAS exposure pathways are ingestion and inhalation. Human exposure

via the dermal contact pathway may occur, and current risk practice suggests it is an insignificant

pathway compared to ingestion; however, exposure data for dermal pathways are sparse and

continue to be the subject of PFAS toxicological study. Receptors for Brooksville RC include site

workers, construction workers, residents, and trespassers. The CSMs for each AOI indicate which

specific receptors could potentially be exposed to PFAS.

Descriptions of the two AOIs are as follows:

AOI 1 is the wash rack area. Potential PFAS releases to soil by the FLARNG occurred at AOI 1

during annual testing of the TriMaxTM units in January 2007 and February 2008. The units were

discharged on the concrete wash rack area and drained to an oil/water separator which then

discharges to the sanitary sewer. It is possible the AFFF foam reached the soil area outside of

the concrete wash rack during discharges.

AOI 2 is the accidental release of AFFF during the installation of the fire suppression system at

AASF #2 hangar, between 2002 and 2003. About 5 gallons of AFFF flowed onto the pavement

behind the building and across the road into the grass area adjacently south of the parking lot.

The CSMs for AOI 1 and AOI 2 are similar, therefore, they are shown on one figure (Figure 6-2).

Ground-disturbing activities to surface soil at AOI 1and AOI 2 could result in site, construction

worker, and trespasser exposure to potential PFAS contamination. Therefore, the exposure

pathway for inhalation of soil particles and ingestion of soil is potentially complete for these

receptors. Migration of PFAS from soil to groundwater is possible. Private and public supply wells

currently exist within a 3-mile radius downgradient of AOI 1 and AOI 2, therefore, groundwater

pathway to residents through water ingestion is potentially complete.
CREWS LAKE

Watershed

AASF #2 Hangar

C-23 Hangar

AOI 2

AOI 1

AFFF Spill Area

Wash Rack Area

!C(

!C(

!C(

!C(

!C(

!C(

!C(

CREWS LAKE

Watershed HANCOCK LAKE

Watershed

WEEKI

WACHI DRAIN

Watershed

Brook sville – Tampa

Bay Regional Airport

CLIENT

REVISED

SCALE

ARNG

GIS BY

CHK BY

MS

MG

7/29/2019

7/29/2019

NOTES Preliminary Assessment for PFAS at Brooksville Readiness Center, FL

1:3,480

7/29/2019 ­ Figure 6-1 PM RG 7/29/2019

Q:\Projects\ENV\GEARS\GEO\ARNG PFAS\900-CAD-GIS\920-GIS or Graphics\MXD\FL\Brooksville_RC\Fig_6-1_Brooksville_RC_AOIs.mxd

12420 Milestone Center Drive

Germantown, MD 20876

Area of Interest

0 2,000 4,000 8,000

Feet

Base Map: Source: Esri, DigitalGlobe,

GeoEye, Earthstar Geographics,

0 145 290 580

Feet Legend

Area of Interest

Potential PFAS Release

No Suspected Release

Facility Boundary

Water Body

Wetland

Surface Water Flow Direction

Inferred Groundwater Flow Direction

!C( Public Water Supply

20
Media

SOURCE PATHWAY RE

AOI 1AOI 2

TriMaxTM Unit 

Testing and 

Accidental Spill

PFAS in 

Surface Soil

Human 

Activities

Leaching/Infiltration

Precipitation

/ 

Run-Off

Airborne Soil 

Particulate

Surface Soil 

at AOI

Shallow 

Groundwater

Surface 

Water/ 

Sediment

Subsurface 

soil

Source Release Mechanism Media Transport and Migration Media Exposure Routes

Inhalation of 

Dust

Ingestion

Ingestion

Ingestion

Ingestion

Hum

C

Flow-Chart ContinuesPartial / Possible FlowFlow-Chart StopsIncomplete PathwayPotentially Complete PathwayComplete Pathway

Site 

Worker

Cons

Wo

Site 

Worker

Cons

W

LEGEND

/ / 

Figure 6

Preliminary Concep

Brooksville Readiness

Potential 

Off-Facility 

Source Not 

under 

Control of 

ARNG

/ 

/ 

/ 
PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

22

7. Conclusions

This report presents a summary of available information gathered during the PA on the use and

storage of AFFF and other PFAS-related activities at Brooksville RC. The PA findings are based

on the information presented in Appendix A and Appendix B.

7.1 Findings

The two AOIs listed in Table 7-1 are potential PFAS releases identified at Brooksville RC during

the PA (Figure 7-1).

Table 7-1: AOIs at Brooksville RC

Area of Interest Name Used by Potential Release

Dates

AOI 1 Wash Rack Area FLARNG 2007 - 2008

AOI 2 AFFF Spill Area FLARNG 2002 - 2003

Based on potential PFAS releases at these AOIs, there is potential for exposure to PFAS

contamination in media at or near the facility. The preliminary CSM for Brooksville RC is shown

on Figure 6-2, which presents the potential receptors and media impacted.

The areas listed in Table 7-2 and discussed in Section 3 were determined to have no suspected

release:

Table 7-2: No Suspected Release Areas

No Suspected

Release Area Used by Rationale for No Suspected ReleaseDetermination

C-23 Hangar FLARNG

Hangar outfitted with water fire suppression

system. Fire truck stored near the hangar has

never been filled with AFFF.

7.2 Uncertainties

A number of information sources were investigated during this PA to determine the potential for

PFAS-containing materials to have been present, used, or released at the facility. Historically,

documentation of PFAS use was not required because PFAS were considered benign. Therefore,

records were not typically kept by the facility or available during the PA on the use of PFAS in

training, firefighting, or other non-traditional activities, or on its disposition.

The conclusions of this PA are predominantly based on the information provided during interviews

with personnel who had direct knowledge of PFAS use at the facility and site visit. Sometimes the

provided information was vague. Gathered information has a degree of uncertainty due to the

absence of written documentation, the limited number of personnel with direct knowledge due to

staffing changes, the time passed since PFAS was first used (1969 to present), and a reliance on

personal recollection. Inaccuracies may arise in potential PFAS release locations, dates of

release, volume of releases, and the concentration of AFFF used. There is also a possibility the

PA has missed a source of PFAS, as the science of how PFAS may enter the environment

continually evolves.
PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

23

In order to minimize the level of uncertainty, readily available data regarding the use and storage

of PFAS were reviewed, retired and current personnel were interviewed, multiple persons were

interviewed for the same potential source area, and potential source areas were visually

inspected.

Table 7-3 summarizes the uncertainties associated with the PA:

Table 7-3: Uncertainties within the PA

Area of Interest Source of Uncertainty

AOI 1 Wash Rack Area Interviewees recalled the four TriMaxTM units were

discharged onto the concrete wash rack; however, the

approximate volume discharged is 30 gallons and it is

unclear if the discharged product migrated beyond the

concrete pads to the vegetation area north of the wash

rack.

AOI 2 AFFF Spill Area Interviewees recalled the AFFF spill onto the asphalt and

grass area of parking lot; however, it is unclear if the 

discharged product migrated beyond the parking lot and

grass area.

7.3 Potential Future Actions

Interviews (covering 2001 to present) indicate that current or former ARNG activities may have

resulted in potential PFAS releases at the two AOIs identified during the PA. Based on the CSMs

developed for the AOIs, there is potential for receptors to be exposed to PFAS contamination in

soil and groundwater at these AOIs. Table 7-4 summarizes the rationale used to determine if the

AOI should be considered for further investigation under the CERCLA process and undergo an

SI.

ARNG will evaluate the need for an SI at Brooksville RC based on the potential receptors, the

potential migration of PFAS contamination off the facility, and the availability of resources.

Table 7-4: Rationale

Area of

Interest

AOI Location Rationale Potential Future Action

AOI 1

Wash

Rack Area

28°28'44.33"N

and

82°27'20.62"W

Annual TriMaxTM unit

testing completed at wash

rack from 2007 to 2008.

Proceed to an SI, focus on soil

and groundwater

AOI 2

AFFF Spill

Area

28°28'44.98"N

and

82°27'16.07"W

Approximately 5 gallons of

3% AFFF spilled some

time in 2002-2003.

Proceed to an SI, focus on soil

and groundwater
Bro o ksville – Tampa

Bay Regio nal Airpo rt

CLIENT

REVISED

SCALE

ARNG

GIS BY

CHK BY

MS

MG

7/29/2019

7/29/2019

NOTES Preliminary Assessment for PFAS at Brooksville Readiness Center, FL

1:48,000

7/29/2019 ­ Figure 7-1 PM RG 7/29/2019

Q:\Projects\ENV\GEARS\GEO\ARNG PFAS\900-CAD-GIS\920-GIS or Graphics\MXD\FL\Brooksville_RC\Fig_7-1_Brooksville_RC_Summary.mxd

12420 Milestone Center Drive

Germantown, MD 20876

Summary o f Findings

0 2,000 4,000 8,000

Feet

Legend

Potential PFAS Release

Facility Boundary

Water Body

Wetland

Base Map: Source: Esri, DigitalGlobe,

GeoEye, Earthstar Geographics,

AASF #2 Hangar

C-23 Hangar

AOI 2

AOI 1

AFFF Spill Area

Wash Rack Area

0 145 290 580

Feet

24
PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

25

8. References

Federal Emergency Management Agency (FEMA). 2012. Flood Insurance Study: Hernando

County, Florida and Incorporated Areas.

Hyde, Adam G., 1975, Soil Survey of Hernando County, Florida. United States Department of

Agriculture Soil Conservation Service

National Ground Water Association (NGWA), 2018. Groundwater and PFAS: State of

Knowledge and Practice. January 2018.

Southwest Florida Water Management District, 2016. Proposed Minimum and Guidance Levels

for Crews Lake in Pasco County, Florida. Draft

Trommer, J.T., Yobbi, D.K., and McBride, W.S., 2009, Surface-Water and Groundwater

Interactions along the Withlacoochee River, West-Central Florida: U.S. Geological Survey

Scientific Investigations Report 2009–5124, 47 p.

U.S. Climate data. (2019). Climate Brooksville - Florida. Retrieved April 24, 2019, from U.S.

Climate data: https://www.usclimatedata.com/climate/brooksville/florida/united-states/usfl0055

United States Environmental Protection Agency (USEPA). 1991. Guidance for Performing

Preliminary Assessments under CERCLA. September.

Wetterhall, W.S., 1964. Geohydrologic Reconnaissance of Pasco and Southern Hernando

Counties, Florida, Florida: Florida Geological Survey, Report of Investigation no. 34
PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

Appendix A

Data Resources
PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

Data resources will be provided separately on CD. Data resources for Brooksville Readiness

Center include:

Environmental Data Resources, IncTM. Geocheck Report

· 2019 Environmental Data Resources, IncTM. Geocheck Report for Brooksville Readiness

Center, Florida

Miscellaneous Data Resources

· 1964 Geohydrologic Reconnaissance of Pasco and Southern Hernando Counties, Florida,

Florida: Florida Geological Survey, Report of Investigation no. 34

· 1975 Soil Survey of Hernando County, Florida

· 2009 Surface-Water and Groundwater Interactions along the Withlacoochee River, WestCentral Florida

· 2012 Flood Insurance Study: Hernando County, Florida and Incorporated Areas

· 2016 Proposed Minimum and Guidance Levels for Crews Lake in Pasco County, Florida

Figure

· Brooksville R AASF 2 C23 Figure
PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

Appendix B

Preliminary Assessment Documentation
PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

Appendix B.1

Interview Records
SGT:

-SGT



PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

Appendix B.2

Visual Site Inspection Checklists
Visual Site Inspection Checklist

Names(s) of people performing VSI:

Recorded by:

ARNG Contact:

Date and Time: February 04, 2019

Method of visit (walking, driving, adjacent): driving and walking

Source/Release Information

Site Name / Area Name / Unique ID: Brooksville Readiness Center / AASF #2

Historic Site Use (Brief Description): Armory, AASF, Maintenance

Current Site Use (Brief Description): Same as above

Physical barriers or access restrictions: Gated access

1. Was PFAS used (or spilled) at the site/area? Y / N

1a. If yes, document how PFAS was used and usage time (e.g., fire fighting training 2001 to 2014):

2. Has usage been documented? Y / N

2a. If yes, keep a record (place electronic files on a disk): 

3. What types of businesses are located near the site? Industrial / Commercial / Plating / Waterproofing / Residential

3a. Indicate what businesses are located near the site

4. Is this site located at an airport/flightline? Y / N

4a. If yes, provide a description of the airport/flightline tenants:

Site / Area Acreage:

Trimax 30 units tested/discharged from 2007-2008 in wash rack.

Hernando County Jail to north, industrial businesses to the east.

Facility to north of Brooksville - Tampa Bay Regional Airport (Hernando County Airport).

Page 1 of 4
Visual Survey Inspection Log

1. Does the facility have a fire suppression system? Y / N

1a. If yes, indicate which type of AFFF has been used:

Ansulite AFFF Concentrate for 3% proportioning.

1b. If yes, describe maintenance schedule/leaks:

Checked Annual, no reported leaks.

1c. If yes, how often is the AFFF replaced:

N/A

1d. If yes, does the facility have floor drains and where do they lead? Can we obtain an as built drawing?

Floor drain leads to oil water separator then to municipal water treatment.

Transport / Pathway Information

1. Does site/area drainage flow off installation? Y / N

1a. If so, note observation and location:

2. Is there channelized flow within the site/area? Y / N

2a. If so, please note observation and location: 

3. Are monitoring or drinking water wells located near the site? Y / N

3a. If so, please note the location: 

4. Are surface water intakes located near the site? Y / N

4a. If so, please note the location: 

5. Can wind dispersion information be obtained? Y / N

5a. If so, please note and observe the location.

N/A

6. Does an adjacent non-ARNG PFAS source exist? Y / N

6a. If so, please note the source and location.

6b. Will off-site reconnaissance be conducted? Y / N

Other Significant Site Features: 

Migration Potential:

to retention pond

Drinking wells about 1/2 mile north of site

N/A

Page 2 of 4
Visual Survey Inspection Log

1. Has the infrastructure changed at the site/area? Y / N

1a. If so, please describe change (ex. Structures no longer exist): 

2. Is the site/area vegetated? Y / N

2a. If not vegetated, briefly describe the site/area composition:

3. Does the site or area exhibit evidence of erosion? Y / N

3a. If yes, describe the location and extent of the erosion: 

4. Does the site/area exhibit any areas of ponding or standing water? Y / N

4a. If yes, describe the location and extent of the ponding: 

Receptor Information

1. Is access to the site restricted? Y / N

1a. If so, please note to what extent:

Gated access

2. Who can access the site? 

2a. Circle all that apply, note any not covered above: 

3. Are residential areas located near the site? Y / N

3a. If so, please note the location/distance: 

less than 1/4 mile. Jail

4. Are any schools/day care centers located near the site? Y / N

4a. If so, please note the location/distance/type: 

5. Are any wetlands located near the site? Y / N

5a. If so, please note the location/distance/type: 

Significant Topographical Features: 

Site Workers / Construction Workers / Trespassers / Residential / Recreational 

Users / Ecological

asphalt/concrete/parking lots

Page 3 of 4
Visual Survey Inspection Log

Additional Notes

Photographic Log

Photo ID/Name

Photograph No.1

Photograph No. 2

Photograph No. 3

Photograph No. 4

Photograph No. 5

Photograph No. 6

Photograph No. 7

Photograph No. 8

Photograph No. 9

Photograph No. 10

Photograph No. 11

Photograph Description

Decomissioned Purple K dry chemical fire exstinguishers 

formerly on the pads.

Purple K dry chemical fire exstinguishers formerly on the pads.

Purple K dry chemical fire exstinguishers formerly on the pads.

Date & Location

02/04/19; AASF Hangar

02/04/19; Chemical Storage

02/04/19; Chemical Storage

02/04/19; Outside AASF Hangar

02/04/19; Wash Rack

Location of 5 gallon spill of mixed AFFF solution outside of the 

fire suppression tank room.

Wash rack where Trimax 30 units were tested/expelled.

02/04/19; C-23 Hangar Foam firefighting "truck" near C-23 Hangar.

02/04/19; AASF Hangar AFFF fire suppression system in AASF #2 hangar.

Ansulite AFFF concentrate for 3% proportioning in AASF #2 

02/04/19; AASF Hangar hanger.

02/04/19; AASF Hangar

02/04/19; AASF Hangar

02/04/19; Outside AASF Hangar

Ansulite AFFF concentrate for 3% proportioning in AASF #2 

hanger.

(2) 900-gallon AFFF for AASF #2 hangar fire suppression 

system.

Grass area where approximately 5 gallons of mixed AFFF 

solution spilled outside of the fire suppression tank room.

Page 4 of 4
PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

Appendix B.3

Conceptual Site Model Information
Preliminary Assessment – Conceptual Site Model Information

Site Name: Brooksville Readiness Center/ AASF #2

Why has this location been identified as a site?

Facility is an AASF. AFFF has been used/stored at facility.

Are there any other activities nearby that could also impact this location?

Brooksville – Tampa Bay Regional Airport (Hernando County Airport)

Training Events

Have any training events with AFFF occurred at this site? No

If so, how often? N/A

How much material was used? Is it documented? N/A

Identify Potential Pathways: Do we have enough information to fully understand over land surface 

water flow, groundwater flow, and geological formations on and around the facility? Any direct 

pathways to larger water bodies? Yes

Surface Water:

Surface water flow direction? Intermittent surface water only during large rainfall and snowmelt 

events. Flow direction is north east

Average rainfall? 43 inches

Any flooding during rainy season? No

Direct or indirect pathway to ditches? Yes

Direct or indirect pathway to larger bodies of water? No

Does surface water pond any place on site? No

Any impoundment areas or retention ponds? Yes

Any NPDES location points near the site? No

How does surface water drain on and around the flight line? To stormwater drains that feed to retention 

pond.
Preliminary Assessment – Conceptual Site Model Information

Groundwater:

Groundwater flow direction? Southwest

Depth to groundwater? unknown

Uses (agricultural, drinking water, irrigation)? Irrigation, potable, agricultural.

Any groundwater treatment systems? no

Any groundwater monitoring well locations near the site? Yes

Is groundwater used for drinking water? No

Are there drinking water supply wells on installation? No

Do they serve off-post populations? No

Are there off-post drinking water wells downgradient? Yes, about 1⁄2 mile south of facility for 

landscape/

Recreational use.

Waste Water Treatment Plant:

Has the installation ever had a WWTP, past or present? No

If so, do we understand the process and which water is/was treated at the plant? N/A

Do we understand the fate of sludge waste? N/A

Is surface water from potential contaminated sites treated? N/A

Equipment Rinse Water

1. Is firefighting equipment washed? Where does the rinse water go? No

2. Are nozzles tested? How often are nozzles tested? Where are nozzles tested? Are nozzles cleaned 

after use? Where does the rinse water flow after cleaning nozzles? N/A

3. Other? N/A. 
Preliminary Assessment – Conceptual Site Model Information

Identify Potential Receptors:

Site Worker Yes

Construction Worker Yes

Recreational User No

Residential Yes

Child No

Ecological Yes

Note what is located near by the site (e.g. daycare, schools, hospitals, churches, agricultural, livestock)?

Hernando County Jail

Documentation

Ask for Engineering drawings (if applicable).

Has there been a reconstruction or changes to the drainage system? When did that occur?

No
PFAS Preliminary Assessment Report

Brooksville Readiness Center, Florida

Appendix C

Photographic Log
Appendix C - Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS

Brooksville Readiness Center/AASF 

#2

Spring Hill, Florida

Preliminary Assessment Report

Brooksville Readiness Center/AASF #2

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

Photograph No. 1

Description:

Decomissioned Purple K dry 

chemical fire exstinguishers 

formerly on the pads.

Orientation:

East

Date 2/4/2019

Time 9:11

Photograph No. 2

Description:

Purple K dry chemical fire 

exstinguishers formerly on 

the pads.

Orientation:

South

Date 2/4/2019

Time 9:15

AECOM Page 1 of 6
Appendix C - Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS

Brooksville Readiness Center/AASF 

#2

Spring Hill, Florida

Preliminary Assessment Report

Brooksville Readiness Center/AASF #2

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites 

ARNG Installations, Nationwide

Photograph No. 3

Description:

Purple K dry chemical fire 

exstinguishers on the pads.

Orientation:

West

Date 2/4/2019

Time 9:21

Photograph No. 4

Description:

Foam firefighting "truck" near 

C-23 Hangar.

Orientation:

Northeast

Date 2/4/2019

Time 9:24

AECOM Page 2 of 6
Appendix C - Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS

Brooksville Readiness Center/AASF 

#2

Spring Hill, Florida

Preliminary Assessment Report

Brooksville Readiness Center/AASF #2

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites 

ARNG Installations, Nationwide

Photograph No. 5

Description:

Ansulite AFFF concentrate 

for 3% proportioning in 

AASF #2 hangar.

Orientation:

Southeast

Date 2/4/2019

Time 9:44

Photograph No. 6

Description:

Ansulite AFFF concentrate 

for 3% proportioning in 

AASF #2 hangar.

Orientation:

East

Date 2/4/2019

Time 9:44

AECOM Page 3 of 6
Appendix C - Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS

Brooksville Readiness Center/AASF 

#2

Spring Hill, Florida

Preliminary Assessment Report

Brooksville Readiness Center/AASF #2

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites 

ARNG Installations, Nationwide

Photograph No. 7

Description:

(2) 900-gallon AFFF for 

AASF #2 hangar fire 

suppression system.

Orientation:

Southwest

Date 2/4/2019

Time 9:46

Photograph No. 8

Description:

Location of 5 gallon spill of 

mixed AFFF solution outside 

of the fire suppression tank 

room.

Orientation:

Southeast

Date 2/4/2019

Time 9:55

AECOM Page 4 of 6
Appendix C - Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS

Brooksville Readiness Center/AASF 

#2

Spring Hill, Florida

Preliminary Assessment Report

Brooksville Readiness Center/AASF #2

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites 

ARNG Installations, Nationwide

Photograph No. 9

Description:

Grass area where 

approximately 5 gallons of 

mixed AFFF solution spilled 

outside of the fire suppression 

tank room.

Orientation:

Date 2/4/2019

Time 9:56

Photograph No. 10

Description:

AFFF fire suppression system 

in AASF #2 hangar.

Orientation:

Southwest

Date 2/4/2019

Time 10:03

AECOM Page 5 of 6
Appendix C - Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS

Brooksville Readiness Center/AASF 

#2

Spring Hill, Florida

Preliminary Assessment Report

Brooksville Readiness Center/AASF #2

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites 

ARNG Installations, Nationwide

Photograph No. 11

Description:

Wash rack where Trimax 

30 units were tested/

discharged.

Orientation:

North

Date 2/4/2019

Time 12:22

AECOM Page 6 of 6