FINAL

Preliminary Assessment Report

Army Aviation Support Facility #1, 

Hammond, Louisiana

Perfluorooctanesulfonic Acid (PFOS) and Perfluorooctanoic 

Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

July 2020

Prepared for:

Army National Guard Bureau

111 S. George Mason Drive

Arlington, VA 22204

UNCLASSIFIED
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

i

Table of Contents

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

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

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

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

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

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

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

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

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

1.5.3 Hydrology .......................................................................................................6

1.5.4 Climate ...........................................................................................................6

1.5.5 Current and Future Land Use .........................................................................7

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

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

C12 Hangar ............................................................................................................12

Main Hangar ...........................................................................................................12

Apron ......................................................................................................................13

4. Emergency Response Areas ............................................................................................15

5. Adjacent Sources .............................................................................................................16

Former AASF Clam Shell Hangars ..........................................................................16

Aircraft Crash ..........................................................................................................16

405 South Oak Street .............................................................................................16

Nickel Plating ..........................................................................................................16

Chrome Plating .......................................................................................................16

Hammond Airport US Customs Building ..................................................................16

Hammond Fire Station ............................................................................................17

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

AOI 1 – C12 Hangar ...............................................................................................19

AOI 2 – Main Hangar and Flight Line-Apron............................................................20

7. Conclusions .....................................................................................................................23

Findings ..................................................................................................................23

Uncertainties ...........................................................................................................23

Potential Future Actions ..........................................................................................24

8. References ......................................................................................................................26
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

ii

Figures

Figure ES-1 Summary of Findings

Figure ES-2 Preliminary Conceptual Site Model, Hammond AASF #1

Figure 1-1 Facility Location

Figure 1-2 Groundwater Features

Figure 1-3 Surface Water Features

Figure 3-1 Non-Fire Training Area

Figure 5-1 Adjacent Sources

Figure 6-1 Areas of Interest

Figure 6-2 Preliminary Conceptual Site Model, AOI 1 & 2

Figure 7-1 Summary of Findings

Tables

Tables ES-1 AOIs at Hammond AASF #1

Table 7-1 AOIs at Hammond AASF #1

Table 7-2 Summary of Uncertainties

Table 7-3 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

Army Aviation Support Facility, Hammond, Louisiana

iii

Acronyms and Abbreviations

°F degrees Fahrenheit

AASF Army Aviation Support Facility

AECOM AECOM Technical Services, Inc.

AFFF

amsl

ANG

aqueous film forming foam

above mean sea level

Air National Guard

AOI Area of Interest

ARNG

bgs

Army National Guard

below ground surface

CERCLA Comprehensive Environmental Response, Compensation, and Liability Act

CSM

EDRTM

conceptual site model

Environmental Data Resources, Inc.TM

FTA

LA

LAARNG

fire training area

Louisiana

Louisiana Army National Guard

PA Preliminary Assessment

PFAS per- and poly-fluoroalkyl substances

PFOA perfluorooctanoic acid

PFOS perfluorooctanesulfonic acid

SI

US

Site Inspection

United States

USACE United States Army Corps of Engineers

USEPA United States Environmental Protection Agency
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

1

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 the current Army Aviation Support Facility (AASF)

#1 in Hammond, Louisiana (LA) to assess potential PFAS release areas and exposure pathways

to receptors. The current AASF #1 is located on 150 acres of land that is part of a parcel owned

by the Hammond Municipal Airport and leased by the Louisiana ARNG (LAARNG). 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 12 March 2019 and completed visual site inspections (VSIs) at

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

disposed;

· Interviewed personnel during the site visit associated with AASF #1 activities including current

LAARNG AASF #1 facility building manager (since 2015), aircraft maintenance supervisor

(since 1986) and aircraft maintenance support (since 1989); and interviewed the City of

Hammond Fire Chief (with department since 2000).

· Identified Area(s) of Interest (AOIs) and developed a preliminary conceptual site model (CSM)

to summarize potential source-pathway-receptor linkages of potential PFAS in soil,

groundwater, surface water, and sediment for each AOI.

Two AOIs related to potential PFAS releases were identified at Hammond AASF #1 during the PA.

The AOIs are shown on Figure ES-1 and described below:

Table ES-1: Hammond AASF #1 PA AOIs

Area of Interest Name Used by Potential Release Date

AOI 1 C12 Hangar LAARNG 2007 – present

AOI 2 Main Hangar and

Flight Line-Apron LAARNG 2007 – present

Based on the potential for spills, leaks, or discharges of AFFF at these AOIs, there is potential for

exposure to PFAS contamination in media at or near the facility. The preliminary CSM for

Hammond AASF #1, which presents the potential receptors and media impacted, is shown on

Figure ES-2. Based on the US Environmental Protection Agency (USEPA) Unregulated

Contaminant Monitoring Rule 3 (UCMR3) data, it was indicated that no PFAS were detected in a

public water system above the USEPA’s lifetime Health Advisory (HA) 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 UCMR3 but might be

detected if analyzed today.

ARNG evaluates the need for an SI at Hammond AASF #1 based on the potential receptors, the

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

Station

Hammond Airport U.S.

Customs Building

Flight Line - Apron

Main Hangar

Former AASF Clam

Shell Hangars

C12 Hangar

Aircraft

Crash Site

Selsers Creek

Selser Canal

AOI 1

AOI 2

Drainage Pond

Concrete Pond

Concrete Pond

CLIENT

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6/12/2020 ­ Figure ES-1 PM RG 6/12/2020

C:\Users\stankevichm\OneDrive - AECOM Directory\ARNG_PFAS_GIS_60552172\MXDs\LA\Hammond_AASF\PA_Figures_Hammond\Fig_ES-1_HammondAASF_SummaryOfFindings.mxd

12420 Milestone Center Drive

Germantown, MD 20876

Summary of Findings

Base Map: Source: Esri, DigitalGlobe, GeoEye,

Earthstar Geographics, CNES/Airbus DS, USDA, USGS,

1:14,400

0 600 1,200 2,400

Feet

Legend

Area of Interest

Potential PFAS Release

No Suspected Release

Facility Boundary

Waterbody

River/Stream

2
Media

SOURCE PATHWAY RECEPTOR

AOIs 1 & 2

Potential spills,

leaks, or

discharges from

AFFF deluge

suppression

systems.

Human

Activities

Precipitation/

Run-Off

Leaching/

Infiltration

Airborne Soil

Particulate

Surface Soil

at AOI

Surface

Water/

Sediment

Shallow

Groundwater

Subsurface

Soil

Source Release

Mechanism Media Transportand Migration Media ExposureRoutes

Inhalation of

Dust

Ingestion

Ingestion

Ingestion

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

Off-facility

Resident

Trespasser/

Visitor

Site

Worker

Construction

Worker

Off-facility

Resident

Trespasser/

Visitor

/ /

LEGEND

/ / /

/ /

Figure ES-2

Preliminary Conceptual Site Model, AOIs 1 & 2

Hammond AASF #1

Potential

Off-Facility

Sources

/

/ /

/ /

/

/

/ /

/

/

Note: The residential receptor refers to an offfacility receptor

/ /

Potential

PFAS in

Surface Soil

Or Trench

Drains

Concrete 

Ponds

3
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

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1. Introduction

Authority and Purpose

The Army National Guard (ARNG)-Installations & Environment Division 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 (USACE) 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 poly-fluoroalkyl substances (PFAS) (a suite of related chemicals), 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 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) #1 in Hammond, LA, 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 the known fire training areas (FTAs) as well as other locations where PFAS 

may have been released into the environment at Hammond AASF #1 (also referred to as the 

“facility”). The term PFAS will be used throughout this report to encompass all PFAS 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 12 March 2019 and completed visual site inspections (VSIs) at 

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

disposed;

· Interviewed personnel during the site visit associated with AASF #1 activities including current 

Louisiana ARNG (LAARNG) AASF #1 facility building manager (since 2015), aircraft 

maintenance supervisor (since 1986) and aircraft maintenance support (since 1989), the City 

of Hammond Fire Chief (with department since 2000), a representative from the LAARNG 
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

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Environmental Management Office, and the LAARNG Southern Region Environmental 

Coordinator;

· Identified Area(s) of Interest (AOIs) and developed a preliminary conceptual site model (CSM) 

to summarize potential source-pathway-receptor linkages of potential PFAS in soil, 

groundwater, surface water, and sediment for each AOI. 

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 – 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

Hammond AASF #1 is co-located with Hammond Northshore Regional Airport and an Air National 

Guard (ANG) facility. The AASF #1 is just north of Highway 190 at 1399 Industrial Park Road 

Hammond, LA 70701, in Tangipahoa Parish (Figure 1-1).

AASF #1 is located on 147 acres of land owned by the Hammond Municipal Airport. Operations 

at Hammond AASF #1 began in 2009; the land was previously undisturbed. 

Facility Environmental Setting

Hammond AASF #1 lies within the Gulf Coast Physiographic Province, a region characterized by 

gently sloping, low relief land. The landscape has been formed primarily by fluvial deposits. There 

are numerous marshes, swamps, and lakes in the vicinity of AASF #1, and the regions streams 

are characterized as sluggish (USACE, 2011). The elevation of the facility is approximately 45 

feet above mean sea level (amsl). 
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

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1.5.1 Geology

Hammond AASF #1 is located within the East Gulf Coastal Plain section of the Coastal Plain

Physiographic province of Louisiana. Specifically, the facility is located above Pleistocene Terrace

deposits, which make up approximately 20 percent (%) of Louisiana’s surficial geology. The

geology is characterized by unconsolidated sediments of lithologic variability as a result of the

alluvial depositional environment, with intermittent occurrences of back-swamp deposits. This

setting produced deposits exhibiting vertical and lateral stratigraphic changes over short distances

(ERM, 2014). The terraces are a result of the paleo-Mississippi River (USACE, 2011).

1.5.2 Hydrogeology

Hammond AASF #1 is located within the Coastal Lowlands Aquifer system. These aquifers consist

of primarily alluvial and deltaic deposits that are as much as 13,000 feet deep in southern

Louisiana. Underneath the Hammond area lies the Chicot Equivalent, Evangeline Equivalent, and

the Jasper Equivalent Aquifer Systems. The primary aquifer used in the Hammond area is the

Tchefuncta aquifer, which is a part of the Jasper Equivalent Aquifer System. Groundwater flow at

the facility (Figure 1-2) is inferred to be to the south (ERM, 2014).

Municipal water supplies in this area are obtained from wells with depths of 2,500 to 2,600 feet

below ground surface (bgs). In a 2009 investigation, groundwater was encountered at depths

between 5 to 20 feet bgs at the neighboring ANG facility. The shallowest water bearing unit occurs

at 7 to 18 feet bgs (ERM, 2014).

No potable wells are located within AASF #1 facility boundary. The facility receives potable water

from a municipal source. Three industrial use wells and one irrigation well are located within the

facility. An EDRTM report conducted a well search for a 1-mile radius surrounding the facility. Using

additional online resources, such as state and local GIS databases, wells were researched to a

4-mile radius of the facility. The EDRTM report (Appendix A) lists two public supply wells, one to

the west-southwest, and one to the east-northeast, at distances of 0.87 miles and 0.91 miles,

respectively. Several domestic wells are listed on the EDRTM within 1 mile of the facility

boundaries. These wells are typically screened in the Chicot Equivalent Aquifer System.

Based on the USEPA Unregulated Contaminant Monitoring Rule 3 data, it was indicated that no

PFAS were detected in a public water system above the USEPA Health Advisory 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

UCMR3 but might be detected if analyzed today.

1.5.3 Hydrology

Hammond AASF #1 is located in the Lower Mississippi Lake Maurepas watershed, in a former

wetlands area. There are no natural surface water bodies at the facility. A drainage channel flows

along the western and southern boundaries of the facility (Figure 1-3). The watershed eventually

drains to Lake Maurepas, which drains to Lake Pontchartrain and ultimately to the Gulf of Mexico.

1.5.4 Climate

The climate in Hammond, LA is humid and warm. The average annual temperature is 66.75

degrees Fahrenheit (°F). Seasonally, temperatures vary, with average summer highs of 91.3°F

and average winter lows of 63°F. Average precipitation is 62.72 inches per year (US Climate Data,

2019).
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

7

1.5.5 Current and Future Land Use

Hammond AASF #1 is a controlled access facility and is adjacent to both the Hammond

Northshore Regional Airport and an ANG facility. The Hammond Airport is owned by the city of

Hammond and is a public use, joint civil-military, general aviation airport. AASF #1 has been

operational since 2009, and it houses and maintains aircraft. Future land use is not anticipated to

change.
Hammond

Airport

^_

CLIENT

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NOTES Preliminary Assessment for PFAS at Hammond AASF, LA

4/28/2020 ­ Figure 1-1 PM RG 4/28/2020

C:\Users\stankevichm\OneDrive - AECOM Directory\ARNG_PFAS_GIS_60552172\MXDs\LA\Hammond_AASF\PA_Figures_Hammond\Fig_1-1_HammondAASF_FacilityLocation.mxd

12420 Milestone Center Drive

Germantown, MD 20876

Facility Location

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

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

1:126,720

0 1 2 4

Miles

Legend

Facility Boundary

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CLIENT

REVISED

SCALE

ARNG

GIS BY

CHK BY

GC

PD

6/17/2020

6/17/2020

NOTES Preliminary Assessment for PFAS at Hammond AASF, LA

6/17/2020 ­ Figure 1-2 PM RG 6/17/2020

C:\Users\stankevichm\OneDrive - AECOM Directory\ARNG_PFAS_GIS_60552172\MXDs\LA\Hammond_AASF\PA_Figures_Hammond\Fig_1-2_HammondAASF_GroundwaterFeatures.mxd

12420 Milestone Center Drive

Germantown, MD 20876

Groundwater Features

Base Map: Source: Esri, DigitalGlobe, GeoEye,

Earthstar Geographics, CNES/Airbus DS, USDA, USGS,

1:95,040

0 0.75 1.5 3

Miles

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9
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CLIENT

REVISED

SCALE

ARNG

GIS BY

CHK BY

GC

PD

4/28/2020

4/28/2020

NOTES Preliminary Assessment for PFAS at Hammond AASF, LA

4/28/2020 ­ Figure 1-3 PM RG 4/28/2020

C:\Users\stankevichm\OneDrive - AECOM Directory\ARNG_PFAS_GIS_60552172\MXDs\LA\Hammond_AASF\PA_Figures_Hammond\Fig_1-3_HammondAASF_Surface_Water_Features.mxd

12420 Milestone Center Drive

Germantown, MD 20876

Surface Water Features

Base Map: Source: Esri, DigitalGlobe, GeoEye,

Earthstar Geographics, CNES/Airbus DS, USDA, USGS,

1:63,360

0 0.5 1 2

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Wetland

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Surface Water Flow Direction

10
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

11

2. Fire Training Areas

No FTAs were identified at Hammond AASF #1 during the PA. According to interviews with staff

at the facility, no fire training that includes suppression has been conducted since base operations

began in 2009. Training activities are limited to fuel shut offs and other procedures that do not

involve AFFF or other suppression materials. The City of Hammond Fire Chief identified an offsite FTA that is approximately 3.1 miles southwest of the facility. This off-site FTA is discussed in

Section 5.3.
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

12

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 may have been stored and/or potentially released were identified through interviews during 

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

3-1. 

C12 Hangar

The C12 Hangar houses C12 aircraft maintenance operations. The geographic coordinates of the 

approximate center of the building are 30°31’31.4’’N; 90°24’57.2’’W. According to aerial imagery, 

the C12 Hangar was constructed between 2007 and 2009. According to interviews with site 

personnel in conjunction with the VSI (Appendix B), the hangar is charged with a Chemguard 

AFFF suppression deluge system with a 441-gallon-capacity tank. The system is manually 

operated by a hose inside the hangar, and the AFFF storage tank is located in a small utility 

building outside of the C12 Hangar. 

During the site visit it was reported that every two years, a “full flow” test of the system is 

conducted using a replacement environmentally friendly foam that is not AFFF. Further details 

regarding this replacement foam were not able to be gathered during the PA. During these tests, 

the replacement foam is flowed through the system in a contained loop so that no foam is released 

to drains or the environment. It is unknown whether an initial acceptance test of the suppression 

system was conducted, which may have left behind residual PFAS. 

There have been no reported releases of the AFFF suppression system in the C12 Hangar. 

Evidence of slight leaking was observed underneath the AFFF tank in the utility room. A drip pan 

was staged underneath the tank. According to information obtained during the site visit, the leak 

is intermittent, the AFFF tank has not leaked to the extent of needing to be refilled, and the drip 

pan has never been full to the point of needing to be emptied. During the VSI, AFFF residue was 

observed in the drip pans. The utility room has a concrete floor, and no floor drains were observed. 

Photographs are included in Appendix C.

Main Hangar

The Main Hangar houses helicopter maintenance operations. The geographic coordinates of the 

approximate center of the building are 30°31’31.4’’N; 90°24’57.2’’W. According to aerial imagery, 

the Main Hangar was constructed between 2007 and 2009. According to interviews with site 

personnel in conjunction with the VSI (Appendix B), the hangar is charged with a Buckeye 3% 

AFFF concentrate suppression deluge system fed by a 999-gallon tank. The tank is located in a 

small building outside of the Main Hangar. 

It was reported that every two years a “full flow” test of the system is conducted using a 

replacement environmentally friendly foam which is not AFFF. Further details regarding this 

replacement foam were not able to be gathered during the PA. During these tests, the 

replacement foam is flowed through the system in a contained loop so that no foam is released 

to drains or the environment. It is unknown whether an initial acceptance test of the suppression 

system was conducted, which may have left behind residual PFAS.

There have been no reported releases of the AFFF suppression system in the Main Hangar. In 

2016 the bladder in the tank ruptured and was replaced. During this replacement, it was reported 

that a contractor removed and replaced the AFFF inside the tank. There is no documentation for 
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

13

this activity. Evidence of slight leaking and corrosion/staining was observed underneath the tank 

on the concrete floor, underneath the feeder pipes to the hangar, and at the joints of the pipes. 

Drip pans are in place to catch any leaks from the pipes. According to interviews with site 

personnel, the leaks are intermittent and have never warranted a refill of the AFFF tank. The drip 

pans have never been full to the point of needing to be emptied. During the VSI. AFFF residue 

was observed in the drip pans. The utility room has a concrete floor and no floor drains were 

observed. Photographs are included in Appendix C.

Apron

The Apron is located outside of the Main Hangar and the C12 Hangar. During the VSI, six TriMaxTM 30 wheel mounted firefighting units were observed on the flight line. A photograph is 

included in Appendix C. According to interviews with site personnel, these units have never been 

discharged. Training is conducted annually with one designated unit that is only filled with soap 

and water. Inspections are performed annually on the Tri-MaxTM units, during which the AFFF is 

removed from the units, containerized, and replaced with new product. The old AFFF is turned in 

to the appropriate state agency. 
Selsers Creek

Selser Canal

Drainage Pond

Concrete Pond

Concrete Pond

Flight Line - Apron

Main Hangar

C12 Hangar

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12420 Milestone Center Drive

Germantown, MD 20876

Non-Fire Training Areas

Base Map: Source: Esri, DigitalGlobe, GeoEye,

Earthstar Geographics, CNES/Airbus DS, USDA, USGS,

1:14,400

0 600 1,200 2,400

Feet

Legend

Point_of_Interest

Potential PFAS Release

Facility Boundary

Waterbody

River/Stream

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4. Emergency Response Areas

No emergency response areas at the facility were identified during the PA through interviews or

document review. All emergency services for the Hammond AASF #1 are provided by the

Hammond Fire Department, which also services the co-located ANG Station and the Municipal

Airport. One off-facility emergency response area is addressed in Section 5.2.
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Army Aviation Support Facility, Hammond, Louisiana

16

5. Adjacent Sources

Seven potential off-facility sources of PFAS not under control of the LAARNG were identified 

during the PA. A description of each potential off-facility source is presented below, and locations 

are shown on Figure 5-1.

Former AASF Clam Shell Hangars

The Former AASF Clam Shell Hangars were temporary structures that were operational from 

2006 to 2010, adjacent to the eastern boundary of the current Hammond AASF #1. Four hangars 

appear on the aerial imagery. According to interviews with site personnel, approximately seven 

Tri-MaxTM 30 units were staged near the Clam Shell Hangars during this time. However, there 

were no reports of AFFF releases during this time. The City of Hammond Fire Chief reported 

knowledge of nozzle testing activities using water, not AFFF, at this location. The Former AASF 

Clam Shell Hangars are considered a potential PFAS release area.

Aircraft Crash

The City of Hammond Fire Chief reported knowledge of a fatal crash involving a single small 

aircraft on 14 October 2015, in which an unknown amount of AFFF was used during the 

emergency response. The crash location was identified to the northwest of the facility at a distance 

of approximately 0.35 miles (Times-Picayune, 2015). The Aircraft Crash site is considered a 

potential PFAS release area.

405 South Oak Street

The City of Hammond Fire Chief, a LAARNG Environmental Management representative, and the 

LAARNG Southern Region Environmental Coordinator reported occasional off-facility training with 

AFFF by Hammond Fire Department and LAARNG personnel. The amount of AFFF used and the 

frequency of these events is unknown. The training location was reported at 405 South Oak 

Street, approximately 3 miles to the southwest of the facility boundary. 405 South Oak Street is 

considered a potential PFAS release area. 

Nickel Plating 

The City of Hammond Fire Chief reported knowledge of chrome and nickel-plating operations in 

the local area. During desktop review, a nickel-plating company, Electroless Nickel Plating, was 

identified to the southwest of the facility at a distance of approximately 5.45 miles. Electroless 

Nickel Plating is considered a potential PFAS release area.

Chrome Plating

During desktop review, a chrome-plating company, The Chrome Shop, was identified to the 

southeast of the facility at a distance of approximately 11.9 miles. The Chrome Shop is considered 

a potential PFAS release area.

Hammond Airport US Customs Building

During the interviews conducted for this PA LAARNG Environmental Management personnel 

reported that the US Customs Building at the Hammond Regional Airport had an AFFF-charged 

fire suppression system. US Customs personnel were not able to provide further information. The 

building is located approximately 0.62 miles to the southwest of the facility. No information was 
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Army Aviation Support Facility, Hammond, Louisiana

17

gathered during the PA about potential PFAS presence or use at the Hammond Regional Airport, 

other than at the US Customs Building. The Hammond Airport US Customs Building is considered 

an area with no suspected release.

Hammond Fire Station

The Hammond Fire Station has bulk storage of AFFF and houses firetrucks that hold AFFF. 

Information on the amount and type of AFFF stored at the station was not obtained during this 

PA. There were no reported leaks, spills, or releases of AFFF at the Hammond Fire Station. The 

building is located approximately 0.54 miles to the south of the facility. The Hammond Fire Station 

is considered an area with no suspected release.

City of Hammond Water and Sewer

Municipal sewer and wastewater treatment facilities have the potential to receive PFAS from any 

source within the treatment district. The City of Hammond Water and Sewer maintenance facility 

is located approximately 0.95-miles to the southwest of the facility, however, no information 

regarding treatment or discharge of wastewater by the City of Hammond was gathered during this 

PA. The City of Hammond Water and Sewer facility is considered an area with no suspected 

release.
Skulls Creek

Branch

Reedy

Ponchatoula Creek

Yellow Water River

East Ponchatoula Creek

Selsers Creek

Tangipahoa River

Selser Canal

Hammond Fire

Station

Hammond Airport

U.S. Customs

Building

City of Hammond Water

and Sewer Facility

Former AASF

Clam Shell Hangars

Aircraft

Crash Site

405 South

Nickel Oak Street

Plating

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12420 Milestone Center Drive

Germantown, MD 20876

Adjacent Sources

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

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

1:63,360

0 0.5 1 2

Miles

Legend

Potential PFAS Release

No Suspected Release

Facility Boundary

Waterbody

Wetland

River/Stream

Chrome

Plating

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6. Preliminary Conceptual Site Model

Based on the PA findings, two non-FTAs were identified as AOIs where PFAS may have been 

incidentally spilled or discharged to the ground surface. As such, these AOIs may be potential 

PFAS source areas. The AOIs are shown on Figure 6-1 and summarized below. 

The following AOIs were identified as potential PFAS source areas at Hammond AASF #1: 

· AOI 1 – C12 Hangar, and

· AOI 2 – Main Hangar and Flight Line-Apron.

The following sections describe the CSM components and the specific preliminary 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 (National Ground Water Association, 2018). 

Receptors at Hammond AASF #1 include site workers, construction workers, residents, 

recreational users, and trespassers. The preliminary CSMs for the AOIs indicate which specific 

receptors could potentially be exposed to PFAS. 

PFAS are water soluble and readily migrate from soil to groundwater. PFAS may migrate from the 

surface soil to the shallow groundwater, which is assumed to be from 5 to 20 ft bgs. Based on the 

southerly groundwater flow direction a potential exists for impacts to on- and off-facility wells from 

ARNG activities at these AOIs. Specifically, three industrial wells and one irrigation well are 

located at the facility; two commercial supply wells and one domestic well are located down to 

cross-gradient within one mile; and, greater than 15 additional domestic wells are located down 

to cross-gradient within 1 – 3 miles. 

AOI 1 – C12 Hangar

AOI 1 is the C12 Hangar which houses aircraft maintenance operations. There have been no 

documented releases of AFFF at the C12 Hangar; however, bulk AFFF has been stored and 

handled since approximately 2007 to ensure readiness of the deluge fire suppression system in 

the hangar. Additionally, every two years, a closed loop full flow of the system is conducted using 

a replacement environmentally friendly foam that is not AFFF. As a result of these management 

and storage activities, there is the potential for PFAS to have been released to the environment. 

No remediation activities have occurred at AOI 1. PFAS may have entered trench drains in the 

hangar which drain to on-facility concrete-lined ponds, and potentially off-facility. 

The preliminary CSM for AOI 1 is presented on Figure 6-2. Potential PFAS exposure pathways 

resulting from releases at AOI 1 are described in Table 6-1:

Table 6-1: Exposure Pathways at AOI 1

Pathway Receptor

Surface Soil Considered a potentially complete pathway to site workers, construction 

workers and trespassers via ingestion or inhalation of dust

Subsurface Soil Considered a potentially complete pathway to construction workers via 

ingestion or inhalation of dust
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

20

Surface Water 

and Sediment Considered a potentially complete pathway to all receptors via ingestion

Groundwater

Considered a potentially complete pathway to construction workers, site 

workers via ingestion of public water supply, and off-facility users of 

groundwater for potable water (residents and workers) via ingestion

AOI 2 – Main Hangar and Flight Line-Apron

AOI 2 is the Main Hangar and Flight Line-Apron. There have been no documented releases of 

AFFF at the Main Hangar and on the Flight Line-Apron; however, bulk AFFF has been stored and 

handled at the Main Hangar since approximately 2007 to ensure readiness of the deluge fire 

suppression system, and every two years a closed loop full flow of the system is conducted using 

a replacement environmentally friendly foam that is not AFFF. Additionally, in 2016 a bladder 

rupture in the 999-gallon AFFF storage tank occurred. Little information was available regarding 

the management of AFFF during this event. The VSI also confirmed the presence of six Tri-MaxTM

30 units staged on the Apron. As a result of these activities, there is the potential for PFAS to have 

been released to the environment. No remediation activities have occurred at AOI 2. PFAS may 

have entered trench drains in the hangar which drain to on-facility concrete-lined ponds, and 

potentially off-facility. PFAS from the Flight Line-Apron may have entered the stormwater trench 

running along the southern boundary of the facility which terminates at a drainage pond in the 

southeast corner of the facility.

The preliminary CSM for AOI 2 is presented on Figure 6-2. Potential PFAS exposure pathways 

resulting from releases at AOI 2 are described in Table 6-2:

Table 6-2: Exposure Pathways at AOI 2

Pathway Receptor

Surface Soil Considered a potentially complete pathway to site workers, construction 

workers and trespassers 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 all receptors via ingestion

Groundwater

Considered a potentially complete pathway to construction workers, site 

workers via ingestion of public water supply, and off-facility users of 

groundwater for potable water (residents and workers) via ingestion
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Hammond Fire

Station

Hammond Airport U.S.

Customs Building

Flight Line - Apron

Main Hangar

C12 Hangar

Aircraft

Crash Site

Former AASF Clam

Shell Hangars

Drainage Pond

Concrete Pond

Concrete Pond

Ponchatoula Creek

Skulls Creek

Selsers Creek

Skulls Creek

Selser Canal

Selsers

Creek

Watershed

Ponchatoula

Creek

Watershed

East Ponchatoula

Creek-Ponchatoula

Creek Watershed

Skulls

Creek-Tangipahoa

River Watershed

AOI 1

AOI 2

Skulls Creek Skulls

Creek

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12420 Milestone Center Drive

Germantown, MD 20876

Areas of Interest

Base Map: Source: Esri, DigitalGlobe, GeoEye,

Earthstar Geographics, CNES/Airbus DS, USDA, USGS,

1:24,000

0 1,000 2,000 4,000

Feet

Legend

Area of Interest

Potential PFAS Release

No Suspected Release

Facility Boundary

Waterbody

Wetland

River/Stream

Surface Water Flow Direction

Groundwater Flow Direction

!P Commercial Public Supply Well

!P Domestic Well

!5 Industrial Well

!5 Irrigation Well

A! Monitoring Well

21
Media

SOURCE PATHWAY RECEPTOR

AOIs 1 & 2

Potential spills,

leaks, or

discharges from

AFFF deluge

suppression

systems.

Potential

PFAS in

Surface Soil

Or Trench

Drains

Human

Activities

Precipitation/

Run-Off

Leaching/

Infiltration

Airborne Soil

Particulate

Surface Soil

at AOI

Surface

Water/

Sediment

Shallow

Groundwater

Subsurface

Soil

Source Release

Mechanism Media Transportand Migration Media ExposureRoutes

Inhalation of

Dust

Ingestion

Ingestion

Ingestion

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

Off-facility

Resident

Trespasser/

Visitor

Site

Worker

Construction

Worker

Off-facility

Resident

Trespasser/

Visitor

/ /

LEGEND

/ / /

/ /

Figure 6-2

Preliminary Conceptual Site Model, AOIs 1 & 2

Hammond AASF #1

Potential

Off-Facility

Sources

/

/ /

/ /

/

/

/ /

/

/

Note: The residential receptor refers to an offfacility receptor

/ /

Concrete 

Ponds

22
PFAS Preliminary Assessment Report

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7. Conclusions

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

the use and storage of AFFF and other PFAS-related activities at Hammond AASF #1. 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 Hammond AASF #1 based on PA 

data. These AOIs are summarized below and shown on Figure 7-1:

Table 7-1: Hammond AASF #1 PA AOIs

Area of Interest Name Used by Potential Release Date

AOI 1 C12 Hangar LAARNG 2007 – present

AOI 2 Main Hangar and 

Flight-Line Apron LAARNG 2007 – present

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

contamination in media at or near the facility. The preliminary CSMs for Hammond AASF #1 are 

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

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 with respect to the use of 

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

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 Hammond AASF #1 began operations (2009 – 

present), and a reliance on personal recollection. 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.

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 7-2 summarizes the uncertainties associated with the PA:

Table 7-2 Summary of Uncertainty

Area of Interest Source of Uncertainty

AOI 2 - Main Hangar

There is little information or documentation available 

about the bladder rupture and the subsequent foam 

replacement procedure.
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

24

Area of Interest Source of Uncertainty

AOI 2 - Apron There is little information available on the procedure 

for changing out AFFF in the Tri-MaxTM units.

AOIs 1 and 2 – C12 Hangar 

and Main Hangar

Details regarding the type of foam used during the 

“full flow” tests of the suppression systems are 

unknown.

AOIs 1 and 2 – C12 Hangar 

and Main Hangar

It is unknown whether an initial acceptance test was 

conducted following the installation of the suppression 

systems.

Potential Future Actions

Interviews and records (covering 2006 – present) indicate that current or former ARNG activities 

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

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

PFAS contamination in soil, groundwater, surface water, and sediment. Table 7-3 summarizes 

the rationale used to determine if the AOI should be considered for further investigation under the 

CERCLA process and undergo an SI.

Table 7-3: PA Findings Summary

Area of Interest AOI Location Rationale Potential Future Action

AOI 1 – C12 

Hangar

30°31’31.4’’N; 

90°24’57.2’’W

AFFF storage and 

handling from 2007 – 

present.

Proceed to an SI, focus 

on soil, groundwater, 

surface water, and 

sediment.

AOI 2 – Main 

Hangar and Flight 

Line-Apron

30°31’31.4’’N; 

90°24’57.2’’W

AFFF storage and 

handling from 2007 – 

present, and 2016 

bladder rupture in AFFF 

tank.

Proceed to an SI, focus 

on soil, groundwater, 

surface water, and 

sediment.

ARNG evaluates the need for an SI at Hammond AASF #1 based on the potential receptors, the 

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

Station

Hammond Airport U.S.

Customs Building

Flight Line - Apron

Main Hangar

Former AASF Clam

Shell Hangars

C12 Hangar

Aircraft

Crash Site

Selsers Creek

Selser Canal

AOI 1

AOI 2

Drainage Pond

Concrete Pond

Concrete Pond

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12420 Milestone Center Drive

Germantown, MD 20876

Summary of Findings

Base Map: Source: Esri, DigitalGlobe, GeoEye,

Earthstar Geographics, CNES/Airbus DS, USDA, USGS,

1:14,400

0 600 1,200 2,400

Feet

Legend

Area of Interest

Potential PFAS Release

No Suspected Release

Facility Boundary

Waterbody

River/Stream

25
PFAS Preliminary Assessment Report

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8. References

ERM. 2014. Compliance Restoration Program – Central Region 2 Final Site Investigation Report

236th Combat Communications Squadron Louisiana Air National Guard Hammond, Louisiana.

April

The Times-Picayune. 2015. 2 Killed in Small Plane Crash at Hammond Airport. Available at

https://www.nola.com/traffic/2015/10/2_killed_in_small_plane_crash.html.

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

Preliminary Assessments under CERCLA. September.

US Army Corps of Engineers (USACE). 2011. Comprehensive Site Evaluation Phase I Report

Hammond Communication Station, Louisiana. December.

US Climate Data. 2019. Available at

https://www.usclimatedata.com/climate/hammond/louisiana/united-states/usla0675 (Accessed

April 2019).
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

Data Resources
PFAS Preliminary Assessment Report

Hammond AASF #1

Hammond, LA

Data Resources will be provided separately on CD. Data Resources for the Hammond AASF

#1 include:

Environmental Data Resources, Inc.TM Report

· 2019 Hammond AASF #1 EDRTM Report 
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

Preliminary Assessment Documentation
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

Appendix B.1

Interview Records




















PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

Appendix B.2

Visual Site Inspection Checklists






PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

Appendix B.3

Conceptual Site Model Information
Preliminary Assessment – Conceptual Site Model Information

Site Name: Hammond AASF

Why has this location been identified as a site?

AFFF is charged in two fire suppression systems on site, and there are trimaxes on site.

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

Fire training in Robert, LA about 2.5 miles to east, coffee can manufacturing nearby, chrome and nickel

plating on the other side of town. Air National Guard facility is adjacent to Hammond AASF.

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?

Surface water flows along the southern boundary of the facility and discharges to the east.

Surface Water:

Surface water flow direction? East

Average rainfall? 62.72 inches per year

Any flooding during rainy season? Yes

Direct or indirect pathway to ditches? Yes

Direct or indirect pathway to larger bodies of water?

Does surface water pond any place on site? No natural ponds

Any impoundment areas or retention ponds? Two retention ponds marked on the map

Any NPDES location points near the site? Unknown

How does surface water drain on and around the flight line? Ditch on the edge of the flight line. Marked

on map.
Preliminary Assessment – Conceptual Site Model Information

Groundwater:

Groundwater flow direction? Unknown

Depth to groundwater? 0 – 10 feet

Uses (agricultural, drinking water, irrigation)? Irrigation

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? N/A

Are there off-post drinking water wells downgradient?

Domestic water wells on all sides of the site.

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?

Do we understand the fate of sludge waste?

Is surface water from potential contaminated sites treated?

Equipment Rinse Water

1. Is firefighting equipment washed? Where does the rinse water go?

N/A

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?

Nozzles tested only with water, as reported by fire chief.

3. Other?
Preliminary Assessment – Conceptual Site Model Information

Identify Potential Receptors:

Site Worker No

Construction Worker No

Recreational User No

Residential No

Child No

Ecological No

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

Homes, businesses, a University to the west

Documentation

Ask for Engineering drawings (if applicable).

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

No changes.
PFAS Preliminary Assessment Report

Army Aviation Support Facility, Hammond, Louisiana

Photographic Log
Preliminary Assessment Report

AECOM

Hammond AASF

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Hammond AASF Hammond, Louisiana

Description:

Fire Suppression System

AFFF tank, Main Hangar.

Date taken: 12 March 2019

Photograph No. 1

Description:

Drip pans for AFFF drips

from Fire Suppression

System, Main Hangar.

Date taken: 12 March 2019

Photograph No. 2
AECOM

Preliminary Assessment Report

Hammond AASF

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Hammond AASF Hammond, Louisiana

Description:

Fire Suppression System

specifications, Main

Hanger.

Date taken: 12 March 2019

Photograph No. 3

Description:

Corrosion on pipes and

floor, Fire Suppression

System tank store room,

Main Hangar.

Date taken: 12 March 2019

Photograph No. 4
AECOM

Preliminary Assessment Report

Hammond AASF

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Hammond AASF Hammond, Louisiana

Description:

Fire Suppression System

tank store room, Main

Hangar.

Date taken: 12 March 2019

Photograph No. 5

Description:

Trimax unit on Main

Hangar flight line.

Date taken: 12 March 2019

Photograph No. 6
AECOM

Preliminary Assessment Report

Hammond AASF

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Hammond AASF Hammond, Louisiana

Description:

Chemical storage trailer

behind Main Hangar with

secondary containment

system and ABC

suppression system.

Formerly used for AFFF

storage.

Date taken: 12 March 2019

Photograph No. 7

Description:

Fire Suppression system for

the chemical storage

building.

Date taken: 12 March 2019

Photograph No. 8
AECOM

Preliminary Assessment Report

Hammond AASF

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Hammond AASF Hammond, Louisiana

Description:

Foam Suppression System,

C12 Hangar (hose operated,

not automatic).

Date taken: 12 March 2019

Photograph No. 9

Description:

Fire Suppression System,

C12 Hangar.

Date taken: 12 March 2019

Photograph No. 10
AECOM

Preliminary Assessment Report

Hammond AASF

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Hammond AASF Hammond, Louisiana

Description:

Foam Suppression System,

C12 Hangar (hose operated,

not automatic).

Date taken: 12 March 2019

Photograph No. 11

Description:

Fire Suppression System,

C12 Hangar.

Date taken: 12 March 2019

Photograph No. 12
AECOM

Preliminary Assessment Report

Hammond AASF

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Hammond AASF Hammond, Louisiana

Description:

Drip pan underneath Fire

Suppression System AFFF

tank, C12 Hangar.

Date taken: 12 March 2019

Photograph No. 13

Description:

Mess Hall Fire Suppression

System. K-class fire

extinguisher

(restaurant/kitchen use).

Date taken: 12 March 2019

Photograph No. 14
AECOM

Preliminary Assessment Report

Hammond AASF

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Hammond AASF Hammond, Louisiana

Description:

Location of former AASF.

Formerly contained

temporary “Clam Shell”

hangars. No Fire

Suppression Systems

present.

Date taken: 12 March 2019

Photograph No. 16

Description:

Location of former AASF.

Formerly contained

temporary “Clam Shell”

hangars. No Fire

Suppression Systems

present.

Date taken: 12 March 2019

Photograph No. 15