FINAL

Preliminary Assessment Report

Army Aviation Support Facility #2

Birmingham, Alabama

Perfluorooctanesulfonic Acid (PFOS) and Perfluorooctanoic 

Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

September 2020

Prepared for:

Army National Guard Bureau

111 S. George Mason Drive

Arlington, VA 22204

UNCLASSIFIED
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

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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 ......................................................................... 7

2. Fire Training Areas ........................................................................................................... 11

3. Non-Fire Training Areas ................................................................................................... 12

3.1 Hangar .................................................................................................................... 12

3.2 Flight Ramp ............................................................................................................ 12

3.3 Training Area .......................................................................................................... 12

3.4 Wash Rack ............................................................................................................. 12

4. Emergency Response Areas ............................................................................................ 14

5. Adjacent Sources ............................................................................................................. 15

5.1 Birmingham ANGB .................................................................................................. 15

5.2 Birmingham-Shuttlesworth International Airport ...................................................... 16

6. Preliminary Conceptual Site Model .................................................................................. 18

6.1 Pathways ................................................................................................................ 18

6.2 Receptors ............................................................................................................... 18

6.3 AOI 1 Hangar .......................................................................................................... 19

6.4 AOI 2 Flight Ramp .................................................................................................. 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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AASF #2, Birmingham, Alabama

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Figures

Figure ES-1 Summary of Findings

Figure ES-2 Preliminary Conceptual Site Model, AASF #2

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 Preliminary Conceptual Site Model, AASF #2

Figure 7-1 Summary of Findings

Tables

Table ES-1 AOIs at AASF #2

Table 5-1 Potential Release Areas at Birmingham ANGB

Table 5-2 Potential Release Areas at Birmingham-Shuttlesworth International Airport

Table 6-1 Exposure Pathways at the AOIs

Table 7-1 AOIs at AASF #2

Table 7-2 No Suspected Release Areas

Table 7-3 Uncertainties

Table 7-4 PA Findings Summary

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
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

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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

ALARNG Alabama Army National Guard

ANGB Air National Guard Base

AOI Area of Interest

ARNG Army National Guard

AST aboveground storage tank

bgs below ground surface

CERCLA Comprehensive Environmental Response, Compensation, and Liability

Act

CSM conceptual site model

EDRTM Environmental Data Resources, Inc.TM

FTA fire training area

gpm gallons per minute

HA Health Advisory

ng/L nanograms per liter

OWS oil/water separator

PA Preliminary Assessment

PFAS per- and polyfluoroalkyl substances

PFOA perfluorooctanoic acid

PFOS perfluorooctanesulfonic acid

SI Site Inspection

UCMR 3 Unregulated Contaminant Monitoring Rule 3

US United States

USEPA United States Environmental Protection Agency

VSI visual site inspection
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

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Executive Summary

The Army National Guard (ARNG) is performing Preliminary Assessments (PAs) and Site

Inspections (SIs) for Perfluorooctanesulfonic acid (PFOS) and Perfluorooctanoic acid (PFOA)

Impacted Sites at ARNG Facilities Nationwide. A PA for per- and polyfluoroalkyl substances

(PFAS)-containing materials was completed for Army Aviation Support Facility (AASF) #2, in

Birmingham, Alabama, to assess potential PFAS release areas and exposure pathways to

receptors. The AASF #2 facility is constructed on a parcel of land owned by the Birmingham

Airport Authority and leased to the Alabama ARNG (ALARNG). The performance of this PA

included the following tasks:

· Reviewed available administrative record documents and Environmental Data Resources,

Inc. (EDR)TM report packages to obtain information relevant to potential PFAS releases, such

as: drinking water well locations, historical aerial photographs, Sanborn maps, and

environmental compliance actions in the area surrounding the facility;

· Conducted a site visit 11 April 2019 and completed visual site inspections at locations where

PFAS-containing materials were suspected of being stored, used, or disposed;

· Interviewed current ALARNG personnel, including environmental managers, and operations

staff;

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

pathway, and receptors PFAS for AASF #2.

Two areas of interest (AOIs) related to potential PFAS releases were identified at AASF #2 during

the PA. The AOIs are shown on Figure ES-1 and summarized in Table ES-1.

Table ES-1: AOIs at AASF #2

Area of Interest Name Used by Potential Release

Date

AOI 1 Hangar ALARNG 1996 to present

AOI 2 Flight Ramp ALARNG Unknown to 2010

According to ALARNG personnel, construction of the AASF #2 facility was completed in 1965.

Based on aerial imagery, the hangar building was constructed between 1970 and 1977. The

Hangar was then expanded around 1998. ALARNG personnel noted that the current aqueous film

forming foam (AFFF) system was installed during the Hangar expansion in 1998 and later

refurbished in 2010 as part of a state-wide effort for ALARNG facilities. Currently the system is

equipped with an overhead suppression system using Ansulite 3% AFFF. The hangar, mechanical

room, flight ramp, and wash rack were investigated during this PA.

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 the facility is shown on

Figure ES-2, which presents the potential receptors and media impacted. Based on the United

States Environmental Protection Agency (USEPA) Unregulated Contaminant Monitoring Rule 3

(UCMR 3) data, it was indicated that no PFAS were detected in a public water system above the

USEPA Lifetime Health Advisory (HA) level within 20 miles of the facility. The HA is 70 parts per

trillion for PFOS and PFOA, individually or combined. PFAS analyses performed in 2016 had

method detection limits that were higher than currently achievable. Thus, it is possible that low

concentrations of PFAS were not detected during the UCMR 3 but might be detected if analyzed

today.
Crash

Area

Airport FTA

Village Creek

Fivemile Creek

Summary of Findings

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0 1,050 2,100 4,200

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Hangar

Training

Area

Flight

Ramp Airport

Parking

Apron

Nozzle Testing Area

Hangar 138

- Phase Dock

Hangar

Hangar 135 - Fuel Cell

Maintenance Hangar

Building 125

- Current Fire Station

Former Fire Station

Building 178

- Supply Building

Empty AFFF

Drum Storage

AOI 2

AOI 1

Wash Rack

Legend

Area of Interest

Potential PFAS Release

No Suspected Release

Facility Boundary

Water Body

Wetland

Stream/River

2
Media

SOURCE PATHWAY RECEPTOR

AOI 1

AOI 2

Accidental Leaks

and Spills; Fire

Suppression

System Testing

PFAS in

Surface Soil

Human

Activities

Precipitation/

Run-Off

Leaching/

Infiltration

Airborne Soil

Particulate

Surface Soil

at AOIs

Surface

Water/

Sediment

Shallow

Groundwater

Subsurface

Soil

Source Release

Mechanism Media Transportand Migration Media ExposureRoutes

Inhalation of

Dust

Ingestion

Human Receptors:

Current/ Future

Flow-Chart Continues

Partial / Possible Flow

Flow-Chart Stops

Incomplete Pathway

Potentially Complete Pathway

Complete Pathway

Site

Worker

Construction

Worker Resident Recreational User

Site

Worker

Construction

Worker Resident Recreational User

LEGEND

Figure ES-2

Preliminary Conceptual Site Model

AASF #2

/ /

/ / /

Ingestion

/ / / /

Notes:

1. The resident and recreational user

receptors refer to an off-site resident and

recreational user.

2. Dermal contact exposure pathway is

incomplete for PFAS.

/

/ /

/ /

Ingestion

Ingestion

/

Potential

Off-Facility

Source Not

under

Control of

ARNG

/

/

/ /

/

3
PFAS Preliminary Assessment Report

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1. Introduction

Authority and Purpose

The Army National Guard (ARNG) G9 is the lead agency in performing Preliminary Assessments 

(PAs) and Site Inspections (SIs) for Perfluorooctanesulfonic acid (PFOS) and Perfluorooctanoic 

acid (PFOA) at Impacted Sites at ARNG Facilities Nationwide. This work is supported by the 

United States (US) Army Corps of Engineers Baltimore District and their contractor AECOM 

Technical Services, Inc. (AECOM) under Contract Number W912DR-12-D-0014, Task Order 

W912DR17F0192, issued 11 August 2017.

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

used per- and polyfluoroalkyl substances (PFAS), primarily in the form of aqueous film forming 

foam (AFFF) released as part of firefighting activities, although other PFAS sources 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 PFAS compounds 

in the environment varies. The regulatory framework at both federal and state levels continues to 

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

Advisories (HAs) for PFOA and PFOS in May 2016, but there are currently no promulgated 

national standards regulating PFAS in drinking water. The HA is 70 parts per trillion for PFOS and 

PFOA, individually or combined.

This report presents the findings of a PA for PFAS-containing materials at the current Army 

Aviation Support Facility (AASF) #2 (referred to as “the facility”), Birmingham, Alabama, 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 Part 300), and Army requirements and guidance. 

This PA documents locations where PFAS may have been released into the environment at the 

facility. 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.

Preliminary Assessment Methods

The performance of this PA included the following tasks: 

· Reviewed available administrative record documents and Environmental Data Resources, 

Inc. (EDR)TM report packages to obtain information relevant to potential PFAS releases, such 

as: drinking water well locations, historical aerial photographs, Sanborn maps, and 

environmental compliance actions in the area surrounding the facility;

· Conducted a site visit on 11 April 2019 and completed visual site inspections (VSIs) at 

locations where PFAS-containing materials were suspected of being stored, used, or 

disposed;

· Interviewed current Alabama ARNG (ALARNG) personnel, environmental managers, and 

operations staff;

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

pathway of PFAS for the Areas of Interest (AOIs) and the facility.
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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 fire training areas (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 – Preliminary Conceptual Site Model: describes the pathways of PFAS transport 

and receptors for the AOIs and the facility.

· 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

Facility Location and Description

The facility is in northeast Birmingham, Jefferson County, Alabama. The facility is within the 

property of Birmingham-Shuttlesworth International Airport, at the northernmost portion of the 

property, off Interstate 59. The site location is depicted on Figure 1-1. 

According to ALARNG personnel, construction of the facility began around 1965. Based on aerial 

imagery, the hangar building was constructed between 1970 and 1977. The Hangar was then 

expanded around 1998. The facility is situated on a parcel of land owned by the Birmingham 

Airport Authority (Jefferson County Alabama, 2019). The current AASF #2 facilities include one 

hangar for the operation, maintenance, and repair of ALARNG rotary-winged aircraft, 

administrative offices, and classrooms. Water and electric utilities are provided by the city of 

Birmingham. 

Facility Environmental Setting

The AASF #2 is situated in the Valley and Ridge Physiographic Province, which is characterized 

by a series of northeast trending linear ridges and valleys underlain by alternating beds of hard 

and soft, highly faulted and folded, sedimentary rocks ranging from Cambrian to Pennsylvanian 

in age (Johnson et al., 2002). Topography at the facility slopes southward toward Village Creek.
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1.5.1 Geology

Surface soils in the valleys of the Valley and Ridge Province were formed mainly in residuum of

weathered limestone and are predominantly red, iron-rich and clay types with silt loam surface

textures. The ridges consist of cherty limestone that produce a gravelly loam and gravelly clay

subsoil and a gravelly silt loam surface layer. Bodine and Fullerton soil series cover an extensive

part of the Valley and Ridge Province (Johnson et al., 2002).

The facility is underlain by the Ketona Dolomite and is located on the Airport anticline close to the

contact with the Ordovician and Upper Cambrian Knox Group. The Ketona Dolomite is

characterized as a light to medium gray, thick-bedded, fine- to coarse-grained dolomite. The

Ketona Dolomite is underlain by the Middle to Upper Cambrian-aged Conasauga Formation. The

Conasauga Formation comprises three intervals of calcium carbonate rock. The uppermost

interval is dolomitic, the middle interval is bioclastic and oolitic limestone, and the lowest interval

is interbedded shale and micritic limestone. The adjacent Knox Group is generally described as

a light to medium gray, laminated, finely crystalline cherty dolomite and limestone (Rindsberg et

al., 2003; Irvin et al., 2006).

Previous subsurface investigations at the adjacent Birmingham Air National Guard Base (ANGB),

located at the Birmingham-Shuttlesworth International Airport, interpreted the dolomite as

belonging to the Knox Group and was encountered at one borehole at 23 feet below ground

surface (bgs) (Leidos, 2019). The geology underlying the facility is depicted on Figure 1-2.

1.5.2 Hydrogeology

The facility sits atop the Valley and Ridge aquifer system, which includes over 20 geologic units

of dolomitic, limestone, chert, sandstone, and shale compositions of Cambrian to Devonian age.

The Valley and Ridge aquifer system includes the Knox Group, the Ketona Dolomite, and the

Conasauga Formation (Kopaska-Merkel et al., 2005). The Knox Group ranges in thickness from

1,500 to 3,500 feet and produces large quantities of water with wells yielding up to 800 gallons

per minute (gpm). The Ketona Dolomite ranges in thickness from 0 to 760 feet and is a major

producer of groundwater in Jefferson County with wells yielding around 300 gpm. Groundwater

in these units are found in dissolution channels, where circulating water has dissolved the rock

and thus increased the porosity (Hunter and Moser, 1990; Kopaska-Merkel et al., 2005).

According to previous investigations at the adjacent Birmingham ANGB, saturated soil has been

identified in the unconsolidated sediments overlaying the bedrock. Saturated soils in

unconsolidated material were encountered at shallow depths of less than 20 feet bgs and

generally do not yield significant quantities of water (Leidos, 2019).

General regional groundwater flow beneath the facility is toward the west, according to Valley and

Ridge aquifer system potentiometric contour maps (Kopaska-Merkel, 2005); however, an SI report

at the Birmingham ANGB interpreted surficial groundwater flow to the south (Leidos, 2019)

(Figure 1-2). An EDRTM report conducted a well search for a 1-mile radius surrounding the facility

(Appendix A). Using additional online resources, such as state and local GIS databases, wells

were researched to a 4-mile radius of the facility. Based on this research, only inactive US

Geological Survey monitoring wells were identified.

Drinking water at the facility is supplied by Birmingham Water Works, who obtains the water from

the Cahaba River and Lake Purdy, which is 6 and 9 miles southwest of the facility, respectively.

Based on the USEPA Unregulated Contaminant Monitoring Rule 3 (UCMR 3) data, it was

indicated that no PFAS was detected in a public water system above the USEPA HAs within 20

miles of the facility. The HA is 70 parts per trillion for PFOS and PFOA, individually or combined.

PFAS analyses performed in 2016 had method detection limits that were higher than currently
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

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achievable. Thus, it is possible that low concentrations of PFAS were not detected during the

UCMR 3 but might be detected if analyzed today.

1.5.3 Hydrology

The AASF #2 lies within the Mobile River Basin (Johnson et al., 2002) in the Upper Village Creek

Watershed. The only surface water bodies near the facility is a retention area, located less than

half a mile northeast of the facility, and Village Creek, which flows southeast to southwest of AASF

#2 and flows into Bayview Lake, which is located approximately 11 miles west of the facility. Village

Creek and Bayview Lake are used for recreational uses including fishing. Surface water flow

drains from the facility to the southwest towards Village Creek. Surface water features surrounding

the facility are shown in Figure 1-3.

1.5.4 Climate

The climate of the Mobile River Basin is warm and humid, ranging from subtropical at the coast

to temperate at higher elevations. In the summer, the Gulf of Mexico produces warm, humid air

that moves inland, creating precipitation (Johnson et al., 2002). The average temperature at

Birmingham is 63.3 degrees Fahrenheit (°F), with an average high of 73.8 °F and an average low

of 52.8 °F. Birmingham receives an average of 53.71 inches of rain per year (WorldClimate, 2020).

1.5.5 Current and Future Land Use

The AASF #2 is a restricted access facility located on the property of Birmingham-Shuttlesworth

International Airport. It also lays adjacent to the Birmingham ANGB. Other properties surrounding

AASF #2 are primarily residential. Reasonably anticipated future land use is not expected to

change from the current land use.
AASF #2, Birmingham, AL

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Facility Location

Base Map: Sources: Esri, HERE, Garmin, USGS,

Intermap, INCREMENT P, NRCan, Esri Japan, METI,

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Barton Branch

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Village Creek

Legend

Facility Boundary

Water Body

Wetland

Stream/River

Inferred Groundwater Flow

Direction

Geology

Ppv1u/Ppv2u - Pottsville Formation

(upper)

Ppv11/Ppv21 - Pottsville Formation

(lower)

PMpw - Parkwood Formation

Mb - Bangor Limestone

Mf - Floyd Shale

Mh - Hartselle Sandstone

Mpm - Pride Mountain Formation

Mtfp - Tuscumbia Limestone and

Fort Payne Chert

Dc - Chattanooga Shale

Srm - Red Mountain Formation

Oc - Chickamauga Limestone

OCccr - Knox Group

(undifferentiated)

Ccr - Copper Ridge Dolomite

Ck - Ketona Dolomite

Cc - Conasauga Formation

Wells

A! Inactive USGS Monitoring Well 0 0.75 1.5 3

Miles

Groundwater Features

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Upper Fivemile

Creek Watershed

Upper Village

Creek

Watershed

Village Creek

F ivem ileCreek

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Water Body

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Surface Water Flow Direction

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Surface Water Features

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Geographics, CNES/Airbus DS, USDA, USGS,

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2. Fire Training Areas

Based on interviews with ALARNG personnel who have been working at the facility since 2002,

no FTAs were identified at the AASF #2. The only training exercises were described as safety

drills and did not involve the use of AFFF.
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3. Non-Fire Training Areas

In addition to FTAs, the PA evaluated areas where PFAS-containing materials may have been 

broadly used, stored, or disposed. This may include buildings with fire suppression systems, paint 

booths, AFFF storage areas, and areas of compliance demonstrations. Information on these 

features obtained during the PA are included in Appendices A and B. Three non-FTAs where 

AFFF was stored and/or potentially released were identified during the PA. A description of each 

non-FTA is presented below and shown on Figure 3-1. Interview records and photographs appear 

in Appendix B and in Appendix C, respectively.

Hangar 

The Hangar is located north of the Flight Ramp and west of the wash rack. The geographic 

coordinates are 33°34’19.6”N and 86°45’02.3”W. In 1996, the facility obtained eight 55-gallon floor 

tanks containing Ansulite 3% AFFF. In 1998, the Hangar was expanded, and an overhead fire 

suppression system was installed consisting of two 1,400-gallon tanks filled with Ansulite 3% 

AFFF. The two 1,400-gallon tanks are in the mechanical room. During the VSI, corrosion was 

observed on the tanks. Markings on the side of the tanks indicate that they were filled in 1997 and 

refilled in August 1998. The fire suppression system was refurbished in 2010 and the AFFF was 

replaced. The disposal of the AFFF removed from the system in 2010 is unknown. Additionally, 

interviewees had no recollection of testing of the system after installation or refurbishment. Floor 

drains and trench drains in the Hangar are routed to the oil/water separator (OWS), which 

discharges to the sanitary sewer. There are no reported releases or spills of AFFF in either the 

eight 55-gallon tanks or the two 1,400-gallon tanks.

Flight Ramp

The Flight Ramp is located is located south of the Hangar. The geographic coordinates are 

33°34’14.6”N and 86°44’59.9”W. Historically, approximately 16 Tri-MaxTM 30 units were staged 

along the ramp. No information was provided regarding the date the units were obtained. These 

extinguishers were maintained by contractors and removed in 2010. No information was available 

concerning the disposal of AFFF when the Tri-MaxTM 30 units were serviced by the outside 

contractor. No information was provided regarding the disposal of the Tri-MaxTM 30 units and 

whether they were full or empty when removed from the facility. Interviewees did not recall any 

instances of AFFF being discharged at the Flight Ramp and there are no reports of any spills or 

leaks. Currently, mobile units equipped with Purple-K are used along the Flight Ramp. Drains 

along the southern edge of the Flight Ramp and the wash rack drain to the OWS, which 

discharges to the sanitary sewer.

Training Area

The Training Area is located southwest of the Flight Ramp. The geographic coordinates are 

33°34’12.2”N and 86°45’03.5”W. The Training Area was used for safety drills. ALARNG personnel 

indicated that these drills did not involve the use of AFFF. The frequency of the safety drills is 

unknown.

Wash Rack

The Wash Rack is located east of the Hangar. The geographic coordinates are 33°34’21.4”N and 

86°44’58.7”W. No records or information from interviewees indicate that AFFF was discharged at 

this location. 
Hangar

Flight Ramp

Training Area

Wash Rack

Legend

Potential PFAS Release

No Suspected Release

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Non-Fire Training Areas

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Geographics, CNES/Airbus DS, USDA, USGS,

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PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

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4. Emergency Response Areas

No emergency response areas were identified at AASF #2 during the PA through interviews or

document review. Birmingham Fire Department provides emergency services at the facility.
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

15

5. Adjacent Sources

Two potential off-facility source of PFAS adjacent to AASF #2, not under the control of the 

ALARNG, were identified during the PA. These potential off-facility sources include the 

Birmingham ANGB and the Birmingham-Shuttlesworth International Airport. These potential 

sources are shown on Figure 5-1 and described below. 

Birmingham ANGB

The Birmingham ANGB is located a quarter-mile southwest of AASF #2. An SI for PFOS and 

PFOA was performed at the Birmingham ANGB in February 2019. Table 5-1 summarizes the 

findings of the SI (Leidos, 2019).

Table 5-1: Potential Release Areas at Birmingham ANGB

Location Name Description SI Findings

Hangar 135 – 

Fuel Cell 

Maintenance 

Hangar

Contains a 1,500-gallon 

aboveground storage tank (AST) 

containing 3% AFFF. 

PFOA and PFOS exceeded the 

HAs for groundwater with a 

combined concentration of 45,230 

nanograms per liter (ng/L). PFAS 

was also detected in soil. Further 

investigation was recommended.

Hangar 138 – 

Phase Dock 

Hangar

Contains an AFFF-equipped fire 

suppression system with a 1,485-

gallon AST containing 3% AFFF. 

PFOS exceeded the HA for 

groundwater with a concentration 

of 560 ng/L. PFAS was also 

detected in soil. Further 

investigation was recommended.

Building 125 – 

Current Fire 

Station

Firetrucks with a combined 1,420-

gallon capacity for AFFF are housed 

at Building 125. Three 500-gallon 

ASTs, which contain a combined 

500 to 600 gallons of AFFF are 

located in the building. An additional 

1,000 gallons of AFFF is stored in a 

foam trailer. A leak from the foam 

trailer was noted in 2010.

PFOS exceeded the HA for 

groundwater with a concentration 

of 2,600 ng/L. PFAS was also 

detected in soil. Further 

investigation was recommended.

Former Fire 

Station

Acted as the base fire station until 

1996. AFFF was stored in 

firefighting vehicles and two 7,500-

gallon foam spreaders.

The SI report groups the Former 

Fire Station with Hangar 135. See 

Hangar 135 results.

Building 178 – 

Supply Building

Currently used to store AFFF in two 

55-gallon drums and approximately

125 5-gallon containers (BB&E,

2016).

Location was not sampled in SI 

due to no known releases of AFFF 

ever occurring.

Empty AFFF 

Drum Storage

Ten empty drums that previously 

contained AFFF are stored at this 

location. 

PFOS in groundwater exceeded 

the HA with a concentration of 460 

ng/L. PFAS was also detected in 

soil. Further investigation was 

recommended.
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

16

Birmingham-Shuttlesworth International Airport

Birmingham-Shuttlesworth International Airport is located directly adjacent to AASF #2, with its 

property extending east, south and west of the facility. A PA report completed for the Birmingham 

ANGB identified multiple potential source areas at the airport. These areas were not addressed 

in the subsequent SI report as they are not on ANGB property. Table 5-2 summaries the findings 

of the PA report (BB&E, 2016).

Table 5-2: Potential Release Areas at Birmingham-Shuttlesworth International Airport

Location Name Rationale

Nozzle Testing Area Located in a grassy area adjacent to the southeast of a concrete 

paved taxi way. Nozzle testing occurred with and without foam.

Airport Parking Apron

Located south of and directly adjacent to the Birmingham ANGB. 

The apron is used for parking, fueling, and maintenance of 

aircraft. It also contains a de-icing area as well as an OWS.

Crash Area

Located approximately 0.7 miles north/northeast of AASF #2. In 

August 2013, an aircraft crashed in this area. The Alabama Air 

National Guard and the Airport Fire Departments responded to the 

incident and discharged large amounts of AFFF (total quantity 

unknown).

Airport FTA

Located less than a mile southwest of the Birmingham ANGB. 

Annual fire training activities took place until the early 1990s, 

which involved ignition of spent or waste fuels and the use of 

water and AFFF by the 117th Air Refueling Wing.
Crash

Area

Airport FTA

Adjacent Sources

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Airport

Parking

Apron

Nozzle Testing Area

Hangar 138

- Phase Dock Hangar Hangar 135

- Fuel Cell

Maintenance Hangar

Building 125

- Current Fire Station

Former Fire Station

Building 178 - Supply Building

Empty AFFF

Drum Storage

Legend

Potential PFAS Release

Facility Boundary

17
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

18

6. Preliminary Conceptual Site Model

Based on the PA findings, two AOIs were identified at AASF #2. Locations of the AOIs are shown 

on Figure 6-1. The preliminary CSM for the AOIs is shown on Figure 6-2. The following sections 

describe the CSM components and the specific preliminary CSM developed for the AOIs. 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.

Pathways

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 (National Groundwater Association, 2018).

Potential AFFF releases identified at the AASF #2 occurred on paved surfaces. Releases to the 

paved surfaces could have migrated a short distance onto the surrounding surface soil. Grounddisturbing activities in surface soil as well as beneath the pavement may result in potential 

exposure to surface soils via ingestion and inhalation of dust particles. AFFF releases to the paved 

surfaces could have infiltrated the subsurface via cracks in the pavement or joints between areas 

that are paved with different materials. Ground-disturbing activities may result in potential 

exposure to subsurface soils and groundwater via ingestion. 

PFAS are water soluble and can migrate readily from soil to groundwater via leaching. Drinking 

water at AASF #2 is provided by the Birmingham Water Works, who sources their water from 

surface water bodies over 6 miles away. No drinking water wells exist at AASF #2 or within a 1-

mile radius of the facility. It is possible that unregistered, private, domestic wells exist 

downgradient of the identified AOIs, which may result in potential exposure via ingestion of 

groundwater.

Surface water runoff at AASF #2 appears to drain to the southwest. It is possible PFAS could 

migrate to nearby tributaries which may result in potential exposure via ingestion of surface water 

and sediment.

Receptors

Receptors at the AASF #2 facility include site workers, construction workers, off-facility 

recreational users, and off-facility residents. These receptors, as they pertain to the facility, are 

described below:

· Site workers typically work at or use the site and may come into contact with the surface soils.

· Construction workers are considered workers who represent a utility worker or other worker 

who would be exposed to surface and/or subsurface conditions through ground-disturbing 

activities. 

· Off-facility recreational users typically identify a person who may recreationally use an offfacility area that may be affected by a PFAS release from the facility. Off-facility recreational 

users could be exposed to sediment and surface water during recreational use.

· Off-facility residents identify receptors who occupy properties outside of AASF #2. Off-facility 

residents may come into contact with groundwater using unregistered wells. 

The preliminary CSM for AASF #1 indicates which specific receptors could potentially be exposed 

to PFAS. The preliminary CSM for the AOIs is shown on Figure 6-2. 
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

19

AOI 1 Hangar 

AOI 1 encompasses the Hangar, which has eight 55-gallon floor tanks containing Ansulite 3% 

AFFF. In 1998, an overhead fire suppression system equipped with two 1,400-gallon AFFF tanks 

was installed. Based on markings, the tanks were likely filled in 1997 and refilled in August 1998. 

In 2010, the fire suppression system was refurbished and the AFFF was again replaced. 

Information regarding a full-scale test of the original suppression system could not be ascertained. 

The tanks are housed within the mechanical room. There are no reported leaks or spills of AFFF; 

however, corrosion on the side of the large tanks was evident.

Any releases at AOI 1 would have occurred on the Hangar floor or mechanical room, which drain 

to floor and trench drains. These drains would convey any AFFF to the OWS and then the sanitary 

sewer. If the fire suppression system underwent a full-scale test, it is possible that AFFF migrated 

outside the hangar and onto the flight ramp and the surrounding grassy areas. Additionally, there 

may be potentially complete exposure pathways at the Village Creek Wastewater Treatment 

Plant, located approximately 9 miles southwest of AASF #2, due to ARNG release. Potential PFAS 

exposure pathways resulting from releases at AOI 1 are described in Table 6-1.

Table 6-1: Exposure Pathways at the AOIs

Pathway Receptor

Surface Soil Considered a potentially complete pathway to site workers and 

construction workers via ingestion or inhalation of dust

Subsurface Soil Considered a potentially complete pathway to construction workers via 

ingestion or inhalation of dust

Surface Water 

and Sediment

Considered a potentially complete pathway to off-facility recreational 

users via ingestion

Groundwater Considered a potentially complete pathway to construction workers and 

off-facility residents via ingestion

AOI 2 Flight Ramp

AOI 2 encompasses the Flight Ramp where approximately 16 Tri-MaxTM 30 units were staged 

until 2010. No information was provided with regard to the date the units were obtained. There 

are no records of discharges or spills of AFFF at AOI 2. 

Any releases at AOI 2 would have occurred on both pavement and grassy surfaces. The 

pavement drains via trench drains along the southern edge of the Flight Ramp to the OWS and 

then to the sanitary sewer. AFFF may have infiltrated into the subsurface soil via cracks or joints 

in the pavement. PFAS are water soluble and can migrate readily from soil to groundwater via 

leaching. Surface water generally flows southwest towards Village Creek, which flows into 

Bayview Lake. Potential PFAS exposure pathways resulting from releases at AOI 2 are described 

in Table 6-1.
A!

A!

Crash

Area

Airport FTA

Upper Fivemile Creek

Watershed

Upper Village Creek

Watershed

Village Creek

Fivemile Creek

Areas of Interest

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Hangar

Training

Area

Flight

Ramp Airport

Parking

Apron

Nozzle Testing Area

Hangar 138

- Phase Dock

Hangar

Hangar 135 - Fuel Cell

Maintenance Hangar

Building 125

- Current Fire Station

Former Fire Station

Building 178

- Supply Building

Empty AFFF

Drum Storage

AOI 2

AOI 1

Wash Rack

Legend

Area of Interest

Potential PFAS Release

No Suspected Release

Facility Boundary

Water Body

Wetland

Stream/River

Surface Water Flow Direction

Inferred Groundwater Flow Direction

A! Inactive USGS Monitoring Well

20
Media

SOURCE PATHWAY RECEPTOR

AOI 1

AOI 2

Accidental Leaks

and Spills; Fire

Suppression

System Testing

PFAS in

Surface Soil

Human

Activities

Precipitation/

Run-Off

Leaching/

Infiltration

Airborne Soil

Particulate

Surface Soil

at AOIs

Surface

Water/

Sediment

Shallow

Groundwater

Subsurface

Soil

Source Release

Mechanism Media Transportand Migration Media ExposureRoutes

Inhalation of

Dust

Ingestion

Human Receptors:

Current/ Future

Flow-Chart Continues

Partial / Possible Flow

Flow-Chart Stops

Incomplete Pathway

Potentially Complete Pathway

Complete Pathway

Site

Worker

Construction

Worker Resident Recreational User

Site

Worker

Construction

Worker Resident Recreational User

LEGEND

Figure 6-2

Preliminary Conceptual Site Model

AASF #2

/ /

/ / /

Ingestion

/ / / /

Notes:

1. The resident and recreational user

receptors refer to an off-site resident and

recreational user.

2. Dermal contact exposure pathway is

incomplete for PFAS.

/

/ /

/ /

Ingestion

Ingestion

/

Potential

Off-Facility

Source Not

under

Control of

ARNG

/

/

/ /

/

21
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

22

7. Conclusions

This report presents a summary of available information gathered during the PA with respect to 

the use of AFFF and other PFAS-related activities at AASF #2. The PA findings are based on the 

information presented in Appendix A and Appendix B.

Findings

Two AOIs related to potential PFAS releases were identified at the AASF #2 during the PA. A 

summary of the AOIs is shown in Table 7-1 and their locations shown on Figure 7-1.

Table 7-1: AOIs at AASF #2

Area of Interest Name Used by Potential Release 

Dates

AOI 1 Hangar ALARNG 1996 to Present

AOI 2 Flight Ramp ALARNG Unknown to 2010

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 AASF #2, which presents 

the potential receptors and media impacted, is shown on Figure 6-2.

The following areas discussed in Section 3 were determined to have no suspected PFAS 

releases.

Table 7-2: No Suspected Release Areas

No Suspected 

Release Area Used by Rationale for No Suspected Release Determination

Training Area ALARNG ALARNG personnel indicated no AFFF was 

used during safety drills.

Wash Rack ALARNG ALARNG personnel indicated no AFFF was 

discharged at this location.

Uncertainties

Available 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 or historically maintained by the facility or available during the PA 

on the use of PFAS in training, firefighting, or other non-traditional activities, or on its disposal. 

The conclusions of this PA are based on all available information, including: previous 

environmental reports, EDRsTM, observations made during the VSI, and interviews. Interviews of 

personnel with direct knowledge of a facility generally provided the most useful insights regarding 

a facility's historical and current PFAS-containing materials. Sometimes the provided information 

was vague or conflicted with other sources. 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 
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

23

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

environment continually evolves.

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

of PFAS were reviewed, 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

Area of Interest Source of Uncertainty

AOI 1 No information was provided regarding whether the fire 

suppression system was tested after installation or refurbishment. 

AOI 1 The fate of the AFFF that was replaced in the fire suppression 

tanks was not provided.

AOI 2 The date the Tri-MaxTM 30 units were obtained by the facility is 

unknown. 

AOI 2

No information was available concerning the disposal of AFFF 

when the Tri-MaxTM 30 units were serviced by the outside 

contractor.

AOI 2

Additionally, the fate of the units after they were removed from the 

facility is unclear. It is also uncertain whether the units were full of 

AFFF when they were removed.

Potential Future Actions

Interviews and records (covering 2002 to present) indicate that ALARNG activity may have 

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

preliminary CSMs developed for the AOIs, there is potential for receptors to be exposed to PFAS 

contamination in soil, groundwater, surface water, and sediment at two 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 AASF #2 based on the potential receptors, the potential 

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

Table 7-4: PA Findings Summary

Area of 

Interest AOI Location Rationale Potential Future Action

AOI 1 

Hangar

33°34’19.6”N; 

86°45’02.3”W

Currently houses overhead fire 

Suppression system with 2,800-gallon 

AFFF capacity and eight 55-gallon floor 

tanks containing AFFF. No discharges 

and/or spills were recorded or reported.

Proceed to an SI, 

focus on soil and 

groundwater 

AOI 2 

Flight Ramp

33°34’14.6”N; 

86°44’59.9”W

Historically, approximately 16 Tri-MaxTM 

units were staged along AOI 2. No spills 

or leaks were recorded or reported.

Proceed to an SI, 

focus on soil and 

groundwater 
Crash

Area

Airport FTA

Village Creek

Fivemile Creek

Summary of Findings

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1:25,200 ­ 12420 Milestone Center Drive

Germantown, MD 20876

0 1,050 2,100 4,200

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Base Map: Source: Esri, Maxar, GeoEye, Earthstar Geographics, CNES/Airbus DS,

USDA, USGS, AeroGRID, IGN, and the GIS User Community

Hangar

Training

Area

Flight

Ramp Airport

Parking

Apron

Nozzle Testing Area

Hangar 138

- Phase Dock

Hangar

Hangar 135 - Fuel Cell

Maintenance Hangar

Building 125

- Current Fire Station

Former Fire Station

Building 178

- Supply Building

Empty AFFF

Drum Storage

AOI 2

AOI 1

Wash Rack

Legend

Area of Interest

Potential PFAS Release

No Suspected Release

Facility Boundary

Water Body

Wetland

Stream/River

24
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

25

8. References

BB&E. 2016. Final Perfluorinated Compounds Preliminary Assessment Site Visit Report, 117th Air

Refueling Wing, Alabama Air National Guard, Birmingham, Alabama. May.

Hunter, J.A. and Moser, P.H. 1990. Ground-Water Availability in Jefferson County, Alabama.

Geological Survey of Alabama: Special Map 224.

Irvin, G.D., Osborne, W.E., Ward, W.E., and Rindsberg, A.K. 2006. Geologic Map of the

Birmingham North 7.5-Minute Quadrangle, Jefferson County, Alabama. Geological Survey of

Alabama. Quadrangle Series Map 45.

Jefferson County Alabama. 2019. Jefferson County Parcel Map. Retrieved from ArcGIS:

https://www.arcgis.com/home/webmap/viewer.html?webmap=371ab21399514cc49ac9a134

d6698ee8. March.

Johnson, G.C., Kidd, R.E., Journey, C.A., Zappia, H., and Atkins, J.B. 2002. Environmental

Setting and Water-Quality Issues of the Mobile River Basin, Alabama, Georgia, Mississippi,

and Tennessee. United States Geological Survey: Water-Resources Investigations Report 02-

4162.

Kopaska-Merkel, D.C., Dean, L.S., and Moore, J.D. 2005. Hydrogeology and Vulnerability to

Contamination of Major Aquifers in Alabama: Area 4. Geological Survey of Alabama: Circular

199D.

Leidos. 2019. Site Inspection Report for Perfluorooctane Sulfonate and Perfluorooctanoic Acid at

Birmingham International Airport, Alabama. Air National Guard. February.

National Ground Water Association. 2018. Groundwater and PFAS: State of Knowledge and

Practice. January.

Rindsberg, A.K., Ward, W.E., Osborne, W.E., and Irvin, G.D. 2003. Geologic Map of the Irondale

7.5-Minute Quadrangle, Jefferson County, Alabama. Geological Survey of Alabama

Quadrangle Series 26.

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

Preliminary Assessments under CERCLA. September.

WorldClimate. 2020. Average Weather Data for Birmingham Alabama.

http://www.worldclimate.com/climate/us/alabama/birmingham. Accessed March 2020.
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

Appendix A

Data Resources
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

Data resources will be provided separately on CD. Data resources for AASF #2 include:

AASF #2 EDR Report

• 2019 EDR Aerial Photo Decade Package. AASF #2, 5701 East Lake Boulevard, Birmingham, 

AL 35212. June.

• 2019 EDR Radius Map ReportTM with GeoCheck®. AASF #2, 5701 East Lake Boulevard, 

Birmingham, AL 35212. June.

• 2019 EDR Certified Sanborn® Map Report. AASF #2, 5701 East Lake Boulevard, 

Birmingham, AL 35212. June.

• 2019 EDR Summary Radius Map Report. AASF #2, 5701 East Lake Boulevard, Birmingham, 

AL 35212. June.

Site Documents

• 2018 Spill Prevention, Control and Countermeasure Plan, Alabama Army National Guard 

Birmingham Complex. November.

• 1995 Plumbing Non-Pressure First Floor Plan: Area 2 (Addition). Army Aviation Support 

Facility No.2 Addition and Alteration. September. 

Miscellaneous Reports

• 2016 BB&E. Final Perfluorinated Compounds Preliminary Assessment Site Visit Report, 117th

Air Refueling Wing, Alabama Air National Guard, Birmingham, Alabama. May.

• 2019 Leidos. Site Inspection Report for Perfluorooctane Sulfonate and Perfluorooctanoic 

Acid at Birmingham International Airport, Alabama. Part 1 of 3. February.

• 2019 Leidos. Site Inspection Report for Perfluorooctane Sulfonate and Perfluorooctanoic 

Acid at Birmingham International Airport, Alabama. Part 2 of 3. February.

• 2019 Leidos. Site Inspection Report for Perfluorooctane Sulfonate and Perfluorooctanoic 

Acid at Birmingham International Airport, Alabama. Part 3 of 3. February.
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

Appendix B

Preliminary Assessment Documentation
PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

Appendix B.1

Interview Records







PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

Appendix B.2

Visual Site Inspection Checklists





PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

Appendix B.3

Conceptual Site Model Information



PFAS Preliminary Assessment Report

AASF #2, Birmingham, Alabama

Appendix C

Photographic Log
Preliminary Assessment Report

AASF #2 Birmingham, AL

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS AASF #2 Birmingham, AL Birmingham, Alabama

Photograph No. 1

Description:

Unknown direction.

Typical AFFF foam tank on 

hangar floor.

Photo date: 4/11/19

Photograph No. 2

Description:

Unknown direction.

Side of the AFFF floor tank in 

the Hangar.

Photo Date: 4/11/19
Preliminary Assessment Report

AASF #2 Birmingham, AL

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS AASF #2 Birmingham, AL Birmingham, Alabama

Photograph No. 3

Description:

Unknown direction.

Floor drain in Mechanical 

Room.

Photo Date: 4/11/19

Photograph No. 4

Description:

Unknown Direction.

General photo of 1,400-gallon 

concentrate tanks in 

Mechanical Room.

Photo Date: 4/11/19
Preliminary Assessment Report

AASF #2 Birmingham, AL

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS AASF #2 Birmingham, AL Birmingham, Alabama

Photograph No. 5

Description:

Unknown direction.

Evidence of corrosion on 

AFFF concentrate tank in 

Mechanical Room.

Photo Date: 4/11/19

Photograph No. 6

Description:

Unknown direction.

General view of overhead 

suppression system in the 

Hangar.

Photo Date: 4/11/19
Preliminary Assessment Report

AASF #2 Birmingham, AL

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS AASF #2 Birmingham, AL Birmingham, Alabama

Photograph No. 7

Description:

Unknown direction.

General floor drain in Hangar.

Photo Date: 4/11/19

Photograph No. 8

Description:

Unknown direction.

General trench drain in 

Hangar. Trench drains in the 

Hangar run along the northeast 

and southwest sides of the 

Hangar.

Photo Date: 4/11/19
Preliminary Assessment Report

AASF #2 Birmingham, AL

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS AASF #2 Birmingham, AL Birmingham, Alabama

Photograph No. 9

Description:

Facing east.

General view of Wash Rack.

Photo Date: 4/11/19

Photograph No. 10

Description:

Facing northeast.

General view northeast of the 

facility, toward the off-site 

retention area. 

Photo Date: 4/11/19
Preliminary Assessment Report

AASF #2 Birmingham, AL

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS AASF #2 Birmingham, AL Birmingham, Alabama

Photograph No. 11

Description:

Facing southeast.

General view of mobile 

Purple-K units on currently 

staged on flight ramp. 

Photo date 4/11/19

Photograph No.12

Description:

Facing northeast.

General view of trench drain 

on south side of the ramp. 

Photo Date: 4/11/19
Preliminary Assessment Report

AASF #2 Birmingham, AL

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS AASF #2 Birmingham, AL Birmingham, Alabama

Photograph No. 13

Description:

Facing northwest.

General view of training area 

designated by ARNG.

Photo Date: 4/11/19