FINAL

Preliminary Assessment Report

Johnstown Army Aviation Support 

Facility #2

Johnstown, Pennsylvania

Perfluorooctane-Sulfonic 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

Johnstown AASF #2,

Johnstown, Pennsylvania

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Table of Contents

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

1. Introduction ........................................................................................................................5

Authority and Purpose ..............................................................................................5

Preliminary Assessment Methods .............................................................................5

Report Organization ..................................................................................................6

Facility Location and Description...............................................................................6

Facility Environmental Setting ...................................................................................7

1.5.1 Soil .................................................................................................................7

1.5.2 Geology .........................................................................................................7

1.5.3 Hydrogeology .................................................................................................8

1.5.4 Hydrology .......................................................................................................8

1.5.5 Climate ...........................................................................................................9

1.5.6 Current and Future Land Use .........................................................................9

2. Fire Training Areas ...........................................................................................................13

Former Burn Area ...................................................................................................13

3. Non-Fire Training Areas ...................................................................................................15

Building 292 ............................................................................................................15

Pump House #1 ......................................................................................................16

Tri-Max Service Area...............................................................................................16

Hangar Apron..........................................................................................................16

AFFF Pond .............................................................................................................17

Drainage Ditch ........................................................................................................17

Building 288 ............................................................................................................17

4. Emergency Response Areas ............................................................................................20

5. Adjacent Sources .............................................................................................................21

Drainage Ditch to Detention Pond ...........................................................................21

Pennsylvania Air National Guard (PAANG) .............................................................21

Runway 15/33 .........................................................................................................21

JCCA ARFF ............................................................................................................22

Richland Township Fire Station ...............................................................................22

6. Preliminary Conceptual Site Model ..................................................................................24

Pathways ................................................................................................................24

Receptors ...............................................................................................................25

AOI 1: Hangar Apron Areas ....................................................................................25

AOI 2: Drainage Areas ...........................................................................................26

AOI 3: Former Burn Area .......................................................................................26

7. Conclusions .....................................................................................................................32

Findings ..................................................................................................................32

Uncertainties ...........................................................................................................37

Potential Future Actions ..........................................................................................37

8. References ......................................................................................................................41
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Johnstown, Pennsylvania

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Tables

Table ES-1 AOIs at AASF #2

Table 6-1 Exposure Pathways at AOI 1

Table 6-2 Exposure Pathways at AOI 2

Table 6-3 Exposure Pathways at AOI 3

Table 7-1 AOIs at AASF #2

Table 7-2 No Suspected Releases, AASF #2

Table 7-3 Site Features and Associated Entities, AASF #2

Table 7-4 Summary of Uncertainties

Table 7-5 PA Findings Summary

Figures

Figure ES-1 Summary of Findings

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

Figure 1-1 Facility Location

Figure 1-2 Groundwater Features

Figure 1-3 Surface Water Features

Figure 2-1 Fire Training Areas

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, AOI 1 Hangar Apron Areas

Figure 6-3 Preliminary Conceptual Site Model, AOI 2 Drainage Areas

Figure 6-4 Preliminary Conceptual Site Model, AOI 3 Former Burn Area

Figure 7-1 Summary of Findings

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

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Johnstown, Pennsylvania

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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

AMEC AMEC Earth & Environmental, Inc.

amsl above mean sea level

AOI Area of Interest

ARFF Aircraft Rescue and Firefighting

ARNG Army National Guard

ASF Aviation Support Facility

bgs below ground surface

CERCLA Comprehensive Environmental Response, Compensation, and Liability Act

CFR Code of Federal Regulations

CSM conceptual site model

DEP Department of Environmental Protection

EDRTM Environmental Data Resources, Inc.TM

FAA Federal Aviation Administration

ft feet

FTA fire training area

GIS Geographic Information System

HA Health Advisory

JCCA Johnstown-Cambria County Airport

NTSB

OWS

National Transportation Safety Board

Oil Water Separator

PA Preliminary Assessment

PAANG Pennsylvania Air National Guard

PAARNG Pennsylvania Army National Guard

PaGWIS Pennsylvania Groundwater Information System

PFAS per- and poly-fluoroalkyl substances

PFOA perfluorooctanoic acid

PFOS perfluorooctanesulfonic acid

SI Site Inspection

UCMR3 Unregulated Contaminant Monitoring Rule 3

US United States

USACE United States Army Corps of Engineers

USACHPPM United States Army Center for Health Promotion and Preventive Medicine

USAR United States Army Reserve

USEPA United States Environmental Protection Agency

USMCR United States Marine Corps Reserve

VSI visual site inspection
PFAS Preliminary Assessment Report

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Johnstown, Pennsylvania

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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 the current Johnstown Army Aviation Support

Facility (AASF) #2 (also referred to as the “facility”) in Johnstown, Pennsylvania, to assess

potential PFAS release areas and exposure pathways to receptors. The current AASF #2 is

constructed on a parcel of land owned by the Johnstown-Cambria County Airport (JCCA) Authority

and leased to the US Government since 1991. This property was further leased to the

Pennsylvania ARNG (PAARNG) in an agreement formalized in 2010, although PAARNG

occupation began as early as 1997 (Skelly and Loy, Inc., 2010). The current agreement expires

in 2051. 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 1-day site visit on 27 August 2019 and completed visual site inspections (VSIs)

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

disposed;

· Interviewed current PAARNG AASF #2 personnel, US Army Reserve (USAR) personnel, and

JCCA Aircraft Rescue and Firefighting staff during the site visit; and

· 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.

Three AOIs related to a potential PFAS release were identified at the current AASF #2 during the

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

Table ES-1: AOIs at AASF #2

Area of Interest Name Used by Potential Release Date

AOI 1 Hangar Apron

Areas PAARNG, USAR 1996 to current

AOI 2 Drainage Areas

PAARNG, USAR,

US Marine Corps

Reserve (USMCR)

Potentially as early as 1996

AOI 3 Former Burn Area PAARNG, USAR,

USMCR Approximately 2004 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 ES-2. Based on the United States

Environmental Protection Agency (USEPA) Unregulated Contaminant Monitoring Rule 3

(UCMR3) data, it was indicated that no PFAS were detected above the USEPA’s lifetime Health

Advisory (HA) in two public water systems, Highland Sewer and Water Authority and Greater

Johnstown Water Authority, within 20 miles of the facility. The HA is 70 parts per trillion for PFOS

and PFOA, individually or combined. The two public water systems were sampled for PFAS

between 2014 and 2015. PFAS analyses performed in 2016 had method detection limits that were
PFAS Preliminary Assessment Report

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Johnstown, Pennsylvania

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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.
Richland Township Fire Station

Hangar Apron

Former Burn Area

AFFF Pond

Building 292

JCCA ARFF

Runway 15/33

Drainage Ditch to Detention Pond

Drainage Ditch

Building 288

Pump House #1

Pennsylvania Air

National Guard Facility

Tri-Max Service Area

Sandy

Run

Clapboard Run

Solomon Run

AOI 3

AOI 2

AOI 1

­ Figure ES-1

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Area of Interest

Potential PFAS Release

No Suspected Release

Estimated Facility Boundary

Facility Boundary

Water Body

River/Stream

Summary of Findings

12420 Milestone Center Drive

Germantown, MD 20876

0 500 1,000 2,000

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3
Media

SOURCE PATHWAY RECEPTOR

AOI 1

AOI 2

AOI 3

PFOS/ 

PFOA in 

Surface Soil/

Surface 

Water

Human 

Activities

Precipitation/ 

Run-Off

Leaching/ 

Infiltration

Airborne Soil 

Particulate

Surface Soil 

at AOI

Surface 

Water/ 

Sediment

Subsurface 

Soil

Shallow 

Groundwater

Source Release 

Mechanism Media Transport and Migration Media Exposure Routes

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 Resident1,2 Recreational User1,3

LEGEND

/ /

/

Figure ES-2

Preliminary Conceptual Site Model

AASF #2, Pennsylvania

Nozzle Testing, 

Familiarization 

Training, AFFF 

Testing and 

Leaks, Excess 

AFFF Disposal

/ /

Potential 

Off-Facility 

Source Not 

under 

Control of 

ARNG

/

/ / / /

/ /

/

/

/ /

/ /

/ /

NOTES

1. The resident and recreational users refer to 

off-site receptors.

2. Inhalation of dust for off-site receptors is likely 

insignificant. 

3. Human consumption of fish potentially 

affected by PFAS is possible.

Site 

Worker

Construction 

Worker Resident1,2 Recreational 

User1,3

4
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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 Lifetime 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 Johnstown 

Army Aviation Support Facility (AASF) #2 (also referred to as the “facility”) in Johnstown, 

Pennsylvania, in accordance with the Comprehensive Environmental Response, Compensation, 

and Liability Act (CERCLA), as amended, the National Oil and Hazardous Substances Pollution 

Contingency Plan (40 Code of Federal Regulations [CFR] Part 300), and 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 the current AASF #2. 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 performed at AASF #2: 

· 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 1-day site visit on 27 August 2019 and completed visual site inspections (VSIs) 

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

disposed;
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· Interviewed current Pennsylvania Army National Guard (PAARNG) AASF #2 personnel, US 

Army Reserve (USAR) personnel, and Johnstown-Cambria County Airport (JCCA) Aircraft 

Rescue and Firefighting (ARFF) staff during the site visit; and 

· 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

Johnstown AASF #2 is located in the northwestern portion of a parcel of land owned by JCCA 

Authority, within the Richland and Conemaugh Townships in Cambria County, Pennsylvania. The 

facility is approximately 5 miles east of the City of Johnstown and 2 miles north of the intersection 

of Highway 219 and Highway 56. Figure 1-1 illustrates the location of the AASF #2; however, 

property boundaries are approximate, based on Geographic Information System (GIS) database 

information provided by PAARNG, and may not reflect informal property agreements. An 

“estimated” facility boundary was additionally added in Figure 1-1 to reflect the current informal 

property agreements. 

JCCA is a joint civil and military airport, with the military comprising approximately 37% of all 

operations (US Army Center for Health Promotion and Preventive Medicine [USACHPPM], 2006). 

Military occupants include PAARNG’s AASF, Pennsylvania Air National Guard (PAANG), the 

USAR, the US Marine Corps, and the US Marine Corps Reserve (USMCR) (Army Public Health 
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Center, 2018). In 1991, the US Government entered a long-term lease agreement with the JCCA 

Authority for the acquirement of approximately 70 acres at JCCA, which has since been amended 

by several supplemental lease agreements. The USAR began construction of an Aviation Support 

Facility (ASF) on the property in 1996. The PAARNG AASF #2 was located in Washington, PA at 

the time but then relocated to the USAR ASF in 1997 (USACHPPM, 2006). Operational usage of 

the property was shared between three military divisions: USAR, PAARNG, and USMCR. The 

PAANG is located on separate property across the airport runway. In 2010, the PAARNG 

occupation was formalized in a land lease agreement between the Secretary of the Army and the 

Commonwealth of Pennsylvania, which designated Buildings 218, 236, 292, a 3,247-square yard 

parking apron, and a 50,000-square yard hangar apron for use by PAARNG. The land occupied 

by PAARNG is on a portion of the land leased under the aforementioned lease with JCCA 

Authority. Both agreements are active and expire in 2051, although they may be extended every 

10 years until 2081. Real estate documentation is included in Appendix A. 

Facility Environmental Setting

JCCA is situated on a plateau in the Allegheny Mountains at a regional topographic high point. 

Thus, surface water and presumably unconfined groundwater generally move radially from this 

position. The surrounding topography is characterized by steep slopes and gently rolling hills. 

Locally, elevations range from 1,880 to 2,278 feet (ft) above mean sea level (amsl). The facility 

sits at an elevation of 2,253 ft amsl with a general topographic gradient to the northwest. 

The area surrounding JCCA is predominantly undeveloped, wooded land, but it has been zoned 

for office commercial, light industrial, manufacturing, and single-family residential use 

(USACHPPM, 2006). Scattered residential homes are located to the west and northwest. The 

facility is northwest of JCCA Runway 15/33, and beyond JCCA property, agricultural lands are 

located to the east. 

1.5.1 Soil

The surface soils at the AASF are primarily disturbed and composed of fill material due to airport 

construction activities. Within the area, the majority of the original soils are from the CookportHazelton-Laidig Association. These soils are formed in residual and colluvial materials and have 

moderately well to well drained, deep to moderately deep, and channery loam characteristics 

(AMEC Earth & Environmental, Inc. [AMEC], 2003). 

1.5.2 Geology

Johnstown AASF #2 is located within the Allegheny Mountain Section physiographic province, 

which is characterized by wide ridges separated by broad valleys and increasing ridge elevations 

to the south (Commonwealth of Pennsylvania, 2018). The Ebensburg anticline runs north to south 

and approximately bisects the property (National Park Service, 2018). 

According to a 1994 geotechnical survey of the Johnstown AASF #2 property, the overburden 

consists of a mixture of organic soil with sands, clay, and silty clay and has a thickness ranging 

from 0.5 to 14 ft below ground surface (bgs). However, much of the overburden has since been 

disturbed by construction activities (AMEC, 2003). The underlying surface rocks belong to the 

Conemaugh Group of the Pennsylvanian age, which is subdivided into the sedimentary bedrock 

units of the Casselman and Glenshaw Formations. The Conemaugh Group is nearly 1,000 ft thick 

and consists mainly of shales and sandstones and some beds of limestone. The Allegheny 

Formation underlies the Conemaugh Group and includes the top of the Upper Freeport coal bed 

to the base of the Brooksville coal bed. The thickness of the Allegheny Formation is between 220 

and 290 ft (Phalen and Martin, 1911). The youngest-age rocks are the Quaternary alluvium 
PFAS Preliminary Assessment Report

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deposits along the Conemaugh River and its tributaries (National Park Service, 2018) (Figure 1-

2).

1.5.3 Hydrogeology

The regional source for groundwater is the Pennsylvanian aquifer, which is part of the Appalachian

Plateau aquifer system. Groundwater yields from the Pennsylvanian aquifer average about 50

gallons per minute, and the Conemaugh Group is a good water bearing unit due to the presence

of sandstone (Skelly and Loy, Inc., 2010; AMEC, 2003). 

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. There are no water supply wells within the facility, and

potable water is supplied by the Southwestern Cambria County Water Authority and the Greater

Johnstown Water Authority. The Southwestern Cambria County Water Authority is a distribution

system that purchases water from Highland Sewer and Water Authority (Southwestern Cambria

County Water Authority, 2018). The Highland Sewer and Water Authority and the Greater

Johnstown Water Authority have surface water intakes at the North Fork, Dalton Run, Beaverdam

Run, Quemahoning, and Lloydell Reservoirs (AMEC, 2003; Highland Sewer and Water Authority, 

2019). The closest reservoir to the facility (Dalton Run) is located approximately 8 miles to the

southwest. Based on the USEPA Unregulated Contaminant Monitoring Rule 3 (UCMR3) data, it

was indicated that no PFAS were detected above the USEPA’s HA in two public water systems,

Highland Sewer and Water Authority and Greater Johnstown Water Authority, within 20 miles of

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

public water systems were sampled for PFAS between 2014 and 2015. 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.

Several domestic wells were identified from the Pennsylvania Groundwater Information System

(PaGWIS) northeast and southeast of the facility, within 4 miles. The domestic wells are typically

screened within the Conemaugh Group and have static water levels ranging from 28 to 70 ft bgs.

Four monitoring wells at JCCA are located approximately 0.5 miles to the east and have static

water levels measurements ranging from 12 to 14 ft bgs, and bedrock was encountered at 3 to 5

ft bgs (Pennsylvania Department of Conservation & Natural Resources, n.d.). Thus, the

monitoring wells are likely screened in bedrock. The groundwater flow direction in the alluvium

likely follows the topographic gradient (generally trending west), but groundwater flow direction in

the bedrock is unknown (AMEC, 2003). Groundwater features are presented on Figure 1-2.

1.5.4 Hydrology

Drainage from the hangar buildings (Buildings 292 and 288) and the apron areas are captured by

two stormwater detention ponds that lead into an intermittent, unnamed stream of Solomon Run,

which is a tributary of the Conemaugh River. The stormwater detention pond that is located

directly west of Building 292 is designated as the “AFFF Pond”. According to the GIS database

information provided by PAARNG, the AFFF Pond and a portion of a drainage ditch leading into

the second stormwater detention pond are located on facility property. The second stormwater

detention pond is located off facility property. Another intermittent stream of Solomon Run is

located southeast of the facility. Both streams flow southwest into Solomon Run and then connect

with the Conemaugh River, located approximately 3.5 miles west of the facility. The general

surface water flow direction from the facility is to the west and northwest (Skelly and Loy, Inc.,

2010). Surface water features are presented on Figure 1-3.
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

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1.5.5 Climate

Johnstown, Pennsylvania is in a humid subtropical climate zone that is generally characterized

by cold and temperate weather. The average high temperature for the summer is 78 degrees

Fahrenheit (°F), and the average winter low temperature is 20°F. The mean annual temperature

is 47°F. The area receives an average of 41 inches of precipitation throughout the year. Generally,

the heaviest rains occur from May to July, although the region experiences year-round rainfall

(National Weather Service, 2019).

1.5.6 Current and Future Land Use

Johnstown AASF #2 serves as a PAARNG aviation maintenance and storage facility for rotary

wing aircraft. The facility is situated on property shared between USAR, PAARNG, and USMCR

and is used for administrative, training, mechanical/maintenance, and storage purposes. Related

infrastructure includes 12 buildings, tarmacs, hangar aprons, parking lots, storage lockers, two

large retention ponds, and one smaller detention pond designed to capture AFFF (Skelly and Loy,

Inc., 2010). Future property agreements between USAR and PAARNG over the occupation of

shared buildings and resources are currently planned. Otherwise, reasonably anticipated future

land use is not expected to change from the current land use described above.
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12420 Milestone Center Drive

Germantown, MD 20876

Facility Location

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

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

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Legend

Estimated Facility

Boundary

Facility Boundary

John Cambria-County

Airport (Approximate)

Johnstown AASF #2

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0 0.75 1.5 3

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Groundwater Features

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Facility Boundary

Water Body

River/Stream

Inferred Groundwater Flow

Direction (Alluvium)

Geology

Quartzite/Sandstone

Shale

Wells

!P Domestic Well

!5 Industrial Well

A! Monitoring Well

A! Other/Unknown Well

11
Solomon Run

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Sandy Run

Peggys Run

Falls Run

Lower Stonycreek

River Watershed

South Fork Little

Conemaugh River

Watershed

Clapboard

Run-Little Conemaugh

River Watershed

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Estimated Facility Boundary

Facility Boundary

Water Body

River/Stream

Surface Water Flow Direction

0 0.25 0.5 1

Miles

Surface Water Features

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Johnstown AASF #2,

Johnstown, Pennsylvania

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2. Fire Training Areas

One FTA was identified through record reviews and interviews during the PA as described below. 

The location of the FTA is shown on Figure 2-1. PA interview and VSI documents are included in 

Appendix B, and photographs are included in Appendix C. 

Former Burn Area

According to PAARNG personnel, the Former Burn Area was previously an unpaved area used 

for burning miscellaneous materials such as paper documents and was the site of fire training 

activities from approximately 2004 to 2010. Historically, the same area also contained a concrete 

batch plant to facilitate the construction of the airport runways. PAARNG personnel reported that 

only Tri-MaxTM fire extinguishers containing water were used to extinguish the fires. The burn area 

was also used by USMCR and USAR, but their activities at the site are unknown. In approximately 

2010, the burn area was regraded and paved over, and a fenced motor pool was constructed over 

the area. The site is currently only used by PAARNG, but the property will be reacquired by the 

USAR in the near future. 
Former Burn Area

Fire Training Area

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Potential PFAS Release

No Suspected Release

Estimated Facility Boundary

Facility Boundary

0 140 280 560

Feet

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PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

15

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. Seven 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 the non-FTAs are shown on Figure 3-1. 

Building 292

Building 292 is an aircraft hangar equipped with an AFFF fire suppression system. The fire 

suppression system is connected to two 1,000-gallon tanks containing 3% AFFF of the brand and 

type National Foam Aer-O-Water 3EM. Building 292 was a joint USAR and PAARNG space from 

1997 to 2007, although PAARNG was the primary occupant. After 2007, PAARNG was the only 

occupant, and Building 292 was officially designated for PAARNG usage in the 2010 land lease. 

Multiple releases of AFFF from Building 292 have been confirmed through fire suppression 

system testing and leakage. According to the ongoing support agreement between the USAR and 

PAARNG, the USAR is responsible for the monitoring, maintenance, and repair of any fire 

prevention and protection systems for all PAARNG-occupied facilities. The support agreement is 

included in Appendix A. 

Building 292 was built in 1996 and testing of the AFFF fire suppression system was conducted 

shortly after installation of the system. During testing, an unspecified amount of AFFF was 

released from the system. In approximately 1998/1999, another release of AFFF occurred from 

the fire suppression system. It is unclear how much AFFF was released and whether this release 

was due to testing or accidental events. PAARNG personnel reported observing foaming from the 

AFFF release in the nearby stormwater detention pond; thus, the pond was named “AFFF Pond”.

From 2003 to 2010, three additional AFFF fire suppression system testing events occurred. 

During testing, AFFF was discharged from the fire suppression system and collected in a lined 

dumpster. A contractor then carted the dumpster away and disposed of the AFFF off-facility. No 

other information was provided about the AFFF disposal method or location. The system was 

recharged with approximately ten 55-gallon drums of AFFF after each testing event. 

In 2007, a broken valve led to the release of AFFF from the system. A PAARNG Mechanic 

Supervisor was present at the scene and reported that approximately 3⁄4 of the hangar were filled 

with AFFF reaching an estimated height of 4 ft inside the hangar. PAARNG personnel attempted 

to contain the AFFF within the hangar, and the AFFF was hosed down the floor drains with water. 

After clean-up activities were completed, a contractor fixed the broken valve and recharged the 

AFFF tanks. 

PAARNG fire crash trucks were historically stationed within Building 292. The newer fire crash 

trucks contained 3% AFFF, and the older trucks contained 6% AFFF. All fire crash trucks were 

turned over for disposal, with the most recent disposal occurring in 2017 or 2018. The fire crash 

trucks did not have any known history of leakage or discharge within Building 292 and were mostly 

unused after 2013. However, prior to disposal, PAARNG personnel reported emptying out the 

AFFF contents of the fire crash trucks into the drains of the hangar apron, described in Section 

3.4. It is unknown where the disposed fire crash trucks are currently located. 

During the VSI, the fire suppression system tank room was found to have an active drip leak of 

AFFF from a pipe. The concrete pavement underneath the pipe was corroded and stained with 

white residue, presumably from AFFF. The USAR was advised by the VSI to eliminate the leak. 

Trench drains within the tank room and hangar space of Building 292 typically lead into an oil 
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

16

water separator (OWS) with an automated knife valve that connects to sanitary sewer. Under the 

circumstance where the Building 292 fire alarm system is tripped, a diverter valve may divert the 

drainage from the OWS to the AFFF Pond (HDR, 2016). The manual diverter valve was installed 

as a back-up method to allow AFFF to be collected in the AFFF Pond. However, according to 

USAR personnel, the diverter valve was reportedly left in the sanitary sewer discharge position 

over the years. See Section 3.5 for more details regarding the AFFF Pond drainage. 

Pump House #1

Pump House #1 is an approximately 2,000 square ft room situated between Buildings 292 and 

288. The pump house contains engines, pumps, and four 55-gallon drums of AFFF of the brand 

National Foam Aer-O-Water 3EM 3% for the support of the fire suppression systems in Buildings 

292 and 288. According to USAR personnel, the AFFF drums contained within the room have 

never leaked, and there was no evidence of AFFF spillage observed during the VSI. No release 

is suspected from the pump house. 

Tri-Max Service Area

The Tri-Max Service Area is the pavement and grassy area near Pump House #1, where PAARNG 

personnel would service Tri-MaxTM fire extinguishers filled with 3% AFFF. During servicing, AFFF 

was occasionally spilled and then left in place to evaporate or disperse with the wind. The amount 

of spillage from the Tri-MaxTM fire extinguishers and frequency of the servicing are unknown. The 

PAARNG was in possession of approximately 20 Tri-MaxTM fire extinguishers during the early 

2000s to 2017/2018, and servicing of the fire extinguishers presumably occurred during this 

timeframe. 

Hangar Apron

The approximately 73,000-square yard hangar apron is located outside Building 292. The usage 

of the hangar apron is shared between USAR and PAARNG. The 2010 land lease officially 

designated 50,000-square yards of hangar apron for PAARNG usage, although it is not 

immediately clear where property boundaries are drawn. 

The hangar apron was the site of nozzle testing activities and familiarization training, which 

occurred at a frequency of every three to four years during the estimated years of 1999/2000 to 

2017/2018. Familiarization training refers to training sessions where personnel would familiarize 

themselves with discharging the Tri-MaxTM fire extinguishers. PAARNG personnel reported that 

Tri-MaxTM fire extinguishers containing AFFF were discharged in the surrounding grassy area of 

the southeastern corner of the hangar apron. Nozzle testing with AFFF from the PAARNG fire 

crash trucks also took place in the same approximate area in the pavement, although the fire 

crash trucks involved in the activity were mostly unused after 2013. 

In 2017/2018, the fire crash trucks and Tri-MaxTM fire extinguishers were turned over for disposal. 

Some of the Tri-MaxTM fire extinguishers were given to USAR, and the remaining were stored at 

Fort Indiantown Gap in Annville, Pennsylvania. It is unknown where the disposed fire crash trucks 

are currently located. Prior to disposal, PAARNG personnel reported emptying out the AFFF 

contents of the Tri-MaxTM fire extinguishers and fire crash trucks into the drains of the hangar 

apron. The drains of the hangar apron lead into an OWS that then discharges via a diverter valve 

to either the sanitary sewer or to the drainage ditch leading into an off-facility stormwater detention 

pond. The capacity of the OWS at the hangar apron is reportedly 30,000-gallons (HDR, 2016). 

See Section 3.6 for more details regarding drainage from the drainage ditch. Currently, the 

hangar apron is equipped with Purple K (non-AFFF) fire extinguishers. 
PFAS Preliminary Assessment Report

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Johnstown, Pennsylvania

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AFFF Pond

The AFFF Pond is a stormwater detention pond located directly west of Building 292. AFFF has 

reportedly been observed in the AFFF Pond throughout the years of facility operation, most 

notably after the 1998/1999 AFFF release incident from Building 292. Thus, the stormwater 

detention pond has been called the “AFFF Pond” by facility personnel and has been identified in 

as-built drawings as a fire protection discharge holding area. The AFFF Pond also has a valving 

system by which the water can be drained to the second off-facility stormwater detention pond 

(HDR, 2016). The AFFF Pond eventually drains to Solomon Run, a tributary of the Conemaugh 

River. 

The Building 292 and Building 288 OWSs have diverter valves that maintain a drainage 

connection to the AFFF Pond. The diverter valves switch in connection to the fire alarm system, 

so when the fire alarm system is triggered, the diverter valve directs drainage from the OWSs into 

the AFFF Pond as opposed to the sanitary sewer. However, according to USAR personnel, the 

diverter valve for Building 292 OWS was reportedly left in the sanitary sewer discharge position 

over the years, so the drainage from Building 292 was likely directed towards the sanitary sewer 

regardless of a fire alarm system trip. 

Drainage Ditch

AFFF has reportedly been observed in the drainage ditch throughout the years of facility 

operation. The drainage ditch is located on facility, but a portion of the drainage ditch is located 

off facility and leads into an off-facility stormwater detention pond (described in Section 5.1). 

The hangar apron OWS has a diverter valve allowing connection to either the sanitary sewer or 

drainage ditch, but it is unknown how the OWS is currently connected or in what circumstances 

the switch between sanitary sewer and drainage ditch would have been made. 

Building 288

Building 288 is an aircraft hangar equipped with an AFFF fire suppression system. The fire 

suppression system is connected to two 1,000-gallon tanks containing 3% AFFF of the brand and 

type National Foam Aer-O-Water 3EM. The building was built in 1999 or 2000, and the USMCR 

began occupation of the building shortly after construction. According to the 2010 Proposed Site 

Plan map, the aircraft ramp/apron outside Building 288 was also designated for USMCR usage 

(see Appendix A). In 2009, UCMR released the property to USAR, and the USAR began 

occupation of the building for their fixed wing operations until June 2017. In July 2017, PAARNG 

took over occupation of the building. However, according to USAR and PAARNG personnel, 

Building 288 may become a joint-use hangar for both military entities in the near future. 

Multiple releases of AFFF from Building 288 have been confirmed through fire suppression 

system testing and leakage from the system. From 2003 to 2010, three AFFF fire suppression 

system testing events occurred within Building 288. During testing, AFFF was discharged from 

the fire suppression system and collected in a lined dumpster. A contractor then carted the 

dumpster away and disposed of the AFFF off-facility. No other information was provided about 

the AFFF disposal method or location. The system was recharged with approximately ten 55-

gallon drums of AFFF after each testing event. In 2004 or 2005, there was a minor break of a 

pipeline carrying AFFF, which released approximately ten gallons of AFFF concentrate into the 

trench drains of the building. The trench drains of Building 288 lead to an industrial OWS, which 

then connects to sanitary sewer unless otherwise diverted via a diverter valve to the stormwater 

OWS. The diverter valve is only used when the fire alarm system is activated within Building 288, 
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

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and the manual diverter valve was installed as a back-up method to allow AFFF to be collected in

the AFFF Pond. See Section 3.5 for more details regarding the AFFF Pond drainage.

The USAR Regional Facility Operations Supervisor, whose knowledge extends to 2000, believed

that the USMCR only used Halon (non-AFFF) fire extinguishers during their operations at Building

288.
!(

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Hangar Apron

Tri-Max Service Area

AFFF Pond

Building 292

Drainage Ditch

Building 288

Pump House #1

Non-Fire Training Areas

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!( Diverter Valve

!( Oil Water Separator

Potential PFAS Release

No Suspected Release

Estimated Facility Boundary

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0 140 280 560

Feet

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PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

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4. Emergency Response Areas

Emergency responses to crashes sometimes require flame suppression, which may result in the

release of PFAS to the environment in the form of AFFF. No emergency response areas were

identified within the current AASF #2 facility during the PA through interviews with PAARNG,

USAR, and JCCA ARFF personnel, whose knowledge covers the period of 1997 to current day.

Aircraft emergency services are provided by the JCCA ARFF, and all other emergency services

are provided by the Richland Township Fire Department. Until 2011, the AASF #2 had a mutual

aid agreement to provide emergency services and support for the Cambria County Department

of Emergency Services. After 2011, it was determined that the AASF #2 no longer had the

appropriate resources to respond to emergencies in accordance with the agreement. The mutual

aid agreements are included in Appendix A.
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

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5. Adjacent Sources

Five potential off-facility sources of PFAS adjacent to the current AASF #2, not under the control 

of the PAARNG, were identified during the PA. A description of each adjacent source is presented 

below, and the adjacent sources are shown on Figure 5-1.

Drainage Ditch to Detention Pond

According to the GIS database information provided by PAARNG, the drainage ditch to detention 

pond source is the off-facility portion of the drainage ditch described in Section 3.6. The drainage 

ditch is a half-mile riprap channel that leads into a second stormwater detention pond and then 

connects with an intermittent, unnamed stream of Solomon Run. In case of major rainfall events, 

an emergency spillway is also located on the east wall of the detention pond (HDR, 2016). 

According to the stormwater system and site layout plans in Appendix A, the second stormwater 

detention pond also receives drainage from paved lots and buildings designated for USMCR or 

USAR usage. 

Pennsylvania Air National Guard (PAANG)

The PAANG facility is located on the northeast portion of JCCA along Airport Road. The PAANG 

facility was established in September 1997, with the mission of assisting in controlling civilian and 

military air traffic for JCCA operations (PAANG, 2008). No off-facility VSI was conducted for the 

PAANG facility; however, PAARNG and JCCA ARFF interviewees did not suspect the PAANG 

facility to contain AFFF or an aviation hangar. Therefore, the PAANG facility is not suspected to 

be an adjacent source of PFAS. 

Runway 15/33

Runway 15/33 trends northwest to southeast and is one of the two primary runways at JCCA. 

Multiple aircraft accidents at Runway 15/33 were identified through interviews with PAARNG and 

JCCA ARFF personnel and a records search.

On 6 January 1974, Commonwealth Commuter Flight 317 crashed while on approach to JCCA. 

The aircraft was a Beechcraft 99A model that was on a regularly scheduled commuter flight 

operated by Air East, Inc. According to the official aircraft accident report, no fire erupted from the 

wreckage (National Transportation Safety Board [NTSB], 1975). Therefore, it is unlikely that AFFF 

was used in the crash response. 

On 26 December 2006, a Cessna 414 aircraft crashed into JCCA in the midfield area near Runway 

15/33 and between Runway 23 and Taxiway G. The geographic coordinates of the crash site are 

40°18’57 N; 78°50’3 W. The aircraft was on a medical transport flight operated by Flight Source, 

LLC (NTSB, n.d.). The ensuing wreckage erupted in flames, and according to PAARNG and JCCA 

ARFF personnel, the incident was responded to jointly by PAARNG, JCCA ARFF, and Richland 

Township Fire Department. An unspecified amount of AFFF was used in response to the accident, 

and the cleanup methods from the site are unknown. 

JCCA ARFF personnel reported that there was a Cessna aircraft crash accident near the 

approach end of Runway 33 that occurred in approximately 2008 or 2009. The accident resulted 

in a fuel spill, and an unknown amount of AFFF was used in response to the accident. The cleanup 

methods from the site are unknown, and no records could be found regarding this crash accident. 

The JCCA ARFF and Richland Township Fire Department were apparently involved in the 

response, but it could not be confirmed if PAARNG responded as well. 
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

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On 6 March 2012, a private Cessna 310 aircraft had a landing gear malfunction and required a 

hard landing at JCCA (Kathryn’s Report, 2012). PAARNG, JCCA ARFF, and Richland Township 

Fire Department responded to the incident by preemptively spraying the runway with AFFF to 

soften the landing impact. The foaming of the runway occurred approximately midfield. An 

unspecified amount of AFFF was used in response to the incident, and the cleanup methods from 

the site are unknown. 

JCCA ARFF

The JCCA ARFF maintains a maintenance facility on the northeast portion of JCCA along Airport 

Road. There are two 60-gallon foam tank capacity ARFF firetrucks, 200-gallon barrels, and 5-

gallon buckets of 6% AFFF stored within the maintenance facility. Additionally, in accordance with 

Federal Aviation Administration (FAA) regulations, the JCCA ARFF performs biannual AFFF 

testing outside the maintenance facility. The interviewed JCCA ARFF personnel estimated that 

less than 5 gallons of 6% AFFF concentrate were released during each testing event. After the 

AFFF was discharged, the area was hosed down with water, and the runoff was captured in an 

adjacent retention pond. The JCCA ARFF had FAA testing records available dating back to 2005. 

Richland Township Fire Station

The Richland Township Fire Department has a fire station due south of the JCCA border, at the 

address 176 Mount Airy Drive, Johnstown, Pennsylvania 15904. No off-facility VSI was conducted 

for the fire station; however, Richland Township Fire Department is known to contain AFFF 

resources due to its involvement in emergency responses at JCCA. Additionally, the Richland 

Township Fire Department is in a mutual aid agreement with JCCA and ARNG to provide 

emergency support services (see Appendix A). Therefore, the Richland Township Fire Station 

was identified as a potential adjacent source. 
Solom onRun

Pennsylvania

Air National

Guard Facility

Richland Township

Fire Station

JCCA ARFF

Runway 15/33

Drainage Ditch to

Detention Pond

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Adjacent Sources

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Legend

Potential PFAS Release

No Suspected Release

Estimated Facility Boundary

Facility Boundary

Water Body

River/Stream

0 550 1,100 2,200

Feet

23
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

24

6. Preliminary Conceptual Site Model

Based on the PA findings, there was one area where AFFF fire training may have occurred, and 

two areas where AFFF was incidentally spilled or captured. As such, these areas are determined 

to be AOIs and may be potential PFAS source areas. The AOI locations are shown on Figure 6-

1 and summarized below: 

· AOI 1 – Hangar Apron Areas

· AOI 2 – Drainage Areas

· AOI 3 – Former Burn Area

The following section describes 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. 

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 Ground Water Association, 2018). 

AFFF releases identified at Johnstown AASF #2 occurred on both surface soil and paved 

surfaces. Releases to the paved surfaces could have migrated a short distance onto the 

surrounding surface soil. Ground-disturbing activities in these grassy and wooded areas 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. No drinking 

water wells exist at Johnstown AASF #2. The facility receives drinking water from municipal water 

services, which have surface water intakes at several reservoirs. The closest reservoir (Dalton 

Run) is located approximately 8 miles to the southwest and is unlikely impacted due to the 

distance from the facility. Several domestic wells are located within 2 miles to the east and may 

be potentially impacted by contaminated groundwater, because groundwater flow direction in the 

bedrock is unknown. It is also possible that unregistered, private, domestic wells exist 

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

groundwater. Accidental ingestion of groundwater may also occur during construction activities 

due to the potential for shallow groundwater across the facility.

Surface water runoff at Johnstown AASF #2 is directed to the drainage areas that compose AOI 

2 or flow downslope towards tributaries that eventually lead to the Conemaugh River. As a result, 

it is possible PFAS migrated to these tributaries and may result in potential exposure via ingestion 

of surface water. 
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

25

Receptors

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

recreational users, and off-facility residents. Trespassers are an unlikely receptor because the 

facility is secured. 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. 

Site workers may also use surrounding areas for recreation (i.e. swimming and/or fishing) and 

come into contact with surface water. 

· 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 could be exposed to surface soils and surface water during 

recreational use.

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

Off-facility residents may come into contact with groundwater using unregistered, private, 

domestic wells. Additionally, off-facility residents may use the surrounding area for recreation 

and may come into contact with surface water.

The preliminary CSMs for Johnstown AASF #2 indicate which specific receptors could potentially 

be exposed to PFAS. The preliminary CSMs for the AOIs at Johnstown AASF #2 are shown on 

Figures 6-2 to 6-4. 

AOI 1: Hangar Apron Areas

AOI 1 includes Building 292, Building 288, Tri-Max Service Area, and hangar apron. AFFF 

releases have occurred due to fire suppression system trips and testing from Building 292 and 

nozzle testing, familiarization training, Tri-MaxTM servicing, and excess AFFF disposal in the apron 

areas.

AFFF releases occurred on both paved areas and directly on grassy surfaces. Some AFFF 

releases may have occurred directly on surface soil or may have infiltrated the subsurface soil via 

cracks in the pavement or in joints between areas that are paved with different materials. 

AFFF releases from the fire suppression systems in Building 288 and Building 292 would have 

been captured by trench drains within the buildings. AFFF releases on the hangar apron would 

have been captured by drains on the hangar apron. All drainage is controlled by diverter valves, 

which either release the drainage as stormwater or as wastewater through connection to the 

sanitary sewer. In the event that the drainage is released as stormwater, the drainage ditch and 

AFFF Pond are the receiving water bodies. The ditch and pond constitute AOI 2, discussed in the 

next section. 

The pathways for PFAS exposure in AOI 1 are considered potentially complete for site workers, 

construction workers, off-facility residents, and recreational users. The preliminary CSM for AOI 

1 is shown on Figure 6-2. Potential PFAS exposure pathways resulting from releases at AOI 1 

are described in Table 6-1.
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

26

Table 6-1: Exposure Pathways at AOI 1

Pathway Receptor

Surface Soil Considered a potentially complete pathway to all receptors via inhalation 

of dust; considered a potentially complete pathway to site workers and 

construction workers via ingestion 

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 and 

off-facility residents via ingestion

AOI 2: Drainage Areas

AOI 2 includes the AFFF Pond and a portion of the drainage ditch that leads into a second offfacility stormwater detention pond. Both drainage areas lead to Solomon Run, which is a tributary 

of the Conemaugh River. AFFF releases from AOI 1 are captured in surface water and sediment 

in AOI 2. Throughout the years of facility operation, the water runoff in both drainage areas 

occasionally has been observed to be foamy as a result of AFFF releases in AOI 1. 

It is unknown if the stormwater detention ponds and drainage ditch are unlined, so surface water 

infiltration to groundwater is possible. 

The pathways for PFAS exposure in AOI 2 are considered potentially complete for site workers, 

construction workers, off-facility residents, and recreational users. The preliminary CSM for AOI 

2 is shown on Figure 6-3. 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 an incomplete pathway to all receptors 

Subsurface Soil Considered an incomplete pathway to all receptors 

Surface Water 

and Sediment 

Considered a potentially complete pathway to all receptors via ingestion

Groundwater Considered a potentially complete pathway to construction workers and 

off-facility residents via ingestion

AOI 3: Former Burn Area

AOI 3 includes the Former Burn Area where AFFF releases may have occurred from fire training 

activities. The Former Burn Area was regraded and paved over in approximately 2010, and the 

current area is a fenced motor pool. 

At the time of the fire training activities (approximately 2004 to 2010), AOI 3 was located on 

unpaved surfaces. Thus, expended AFFF may have been released directly onto surface soil and 

then infiltrated the subsurface soil. Surface water runoff at AOI 3 generally flows west towards 

Solomon Run, which is a tributary of the Conemaugh River. 
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

27

The pathways for PFAS exposure in AOI 3 are considered potentially complete for site workers,

construction workers, off-facility residents, and recreational users. The preliminary CSM for AOI

3 is shown on Figure 6-4. Potential PFAS exposure pathways resulting from releases at AOI 3

are described in Table 6-3.

Table 6-3: Exposure Pathways at AOI 3

Pathway Receptor

Surface Soil Considered a potentially complete pathway to all receptors via inhalation

of dust; considered a potentially complete pathway to site workers and 

construction workers via ingestion

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 residents and

recreational users via ingestion

Groundwater Considered a potentially complete pathway to construction workers and

off-facility residents via ingestion
!P

!P

!P

A!A!

A!

A!

A!A!

A!

!P

!P

!P

Richland Township Fire Station

Hangar Former Burn Area Apron

AFFF Pond

Building 292

JCCA ARFF

Runway 15/33

Drainage Ditch to Detention Pond

Drainage Ditch

Building 288

Pump House #1

Pennsylvania Air

National Guard Facility

Tri-Max Service Area

AOI 3

AOI 2

AOI 1

Sandy

Run

Clapboard Run

Solomon Run

Lower Stonycreek

River Watershed

South Fork Little

Conemaugh River

Watershed

Clapboard

Run-Little Conemaugh

River Watershed

­ Figure 6-1

CLIENT

REVISED

SCALE

PROJECT

ARNG

Preliminary Assessment for PFAS at Johnstown AASF #2, PA

7/15/2020

7/15/2020

7/15/2020

MS

ST

RG

GIS BY

CHK BY

PM

Base Map: Sources: Esri, HERE, Garmin, USGS, Intermap, INCREMENT P, NRCan,

Esri Japan, METI, Esri China (Hong Kong), Esri Korea, Esri (Thailand), NGCC, (c)

7/15/2020

1:12,000

C:\Users\stankevichm\OneDrive - AECOM Directory\ARNG_PFAS_GIS_60552172\MXDs\PA\Johnstown_AASF2\Fig_6-1_Johnstown_AASAF2_AOIs.mxd

Area of Interest

Potential PFAS Release

No Suspected Release

Estimated Facility Boundary

Facility Boundary

River/Stream

Surface Water Flow Direction

Inferred Groundwater Flow Direction (Alluvium)

!P Domestic Well

A! Monitoring Well

A! Other/Unknown Well

Areas of Interest

12420 Milestone Center Drive

Germantown, MD 20876

0 500 1,000 2,000

Feet

28
Media

SOURCE PATHWAY RECEPTOR

AOI 1

PFOS/ 

PFOA in 

Surface Soil

Human 

Activities

Precipitation/ 

Run-Off

Leaching/ 

Infiltration

Airborne Soil 

Particulate

Surface Soil 

at AOI

Surface 

Water/ 

Sediment

Subsurface 

Soil

Shallow 

Groundwater

Source Release 

Mechanism Media Transport and Migration Media Exposure Routes

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 Resident1,2 Recreational User1,3

LEGEND

/ /

/

Figure 6-2

Preliminary Conceptual Site Model

AOI 1 Hangar Apron Areas

Nozzle Testing, 

Familiarization 

Training, AFFF 

Testing and 

Leaks, Excess 

AFFF Disposal

/ /

Potential 

Off-Facility 

Source Not 

under 

Control of 

ARNG

/

/ / / /

/ /

/

/

/ /

/ /

/ /

NOTES

1. The resident and recreational users refer to 

off-site receptors.

2. Inhalation of dust for off-site receptors is likely 

insignificant. 

3. Human consumption of fish potentially 

affected by PFAS is possible.

Site 

Worker

Construction 

Worker Resident1,2 Recreational 

User1,3

29
Media

SOURCE PATHWAY RECEPTOR

AOI 2

PFOS/ 

PFOA in 

Surface 

Water

Human 

Activities

Precipitation/ 

Run-Off

Leaching/ 

Infiltration

Airborne Soil 

Particulate

Surface Soil 

at AOI

Surface 

Water/ 

Sediment

Subsurface 

Soil

Shallow 

Groundwater

Source Release 

Mechanism Media Transport and Migration Media Exposure Routes

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 Resident1,2 Recreational User1,3

LEGEND

/ /

/

Figure 6-3

Preliminary Conceptual Site Model

AOI 2 Drainage Areas

Nozzle Testing, 

Familiarization 

Training, AFFF 

Testing and 

Leaks, Excess 

AFFF Disposal

/ /

Potential 

Off-Facility 

Source Not 

under 

Control of 

ARNG

/

/ / / /

/ /

/

/

/ /

/ /

/ /

NOTES

1. The resident and recreational users refer to 

off-site receptors.

2. Inhalation of dust for off-site receptors is likely 

insignificant. 

3. Human consumption of fish potentially 

affected by PFAS is possible.

Site 

Worker

Construction 

Worker Resident1,2 Recreational 

User1,3

30
Media

SOURCE PATHWAY RECEPTOR

AOI 3

PFOS/ 

PFOA in 

Surface Soil

Human 

Activities

Precipitation/ 

Run-Off

Leaching/ 

Infiltration

Airborne Soil 

Particulate

Surface Soil 

at AOI

Surface 

Water/ 

Sediment

Subsurface 

Soil

Shallow 

Groundwater

Source Release 

Mechanism Media Transport and Migration Media Exposure Routes

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 Resident1,2 Recreational User1,3

LEGEND

/ /

/

Figure 6-4

Preliminary Conceptual Site Model

AOI 3 Former Burn Area

Fire Training

/ /

Potential 

Off-Facility 

Source Not 

under 

Control of 

ARNG

/

/ / / /

/ /

/

/

/ /

/ /

/ /

NOTES

1. The resident and recreational users refer to 

off-site receptors.

2. Inhalation of dust for off-site receptors is likely 

insignificant. 

3. Human consumption of fish potentially 

affected by PFAS is possible.

Site 

Worker

Construction 

Worker Resident1,2 Recreational 

User1,3

31
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

32

7. Conclusions

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

storage of AFFF and other PFAS-related activities at the current AASF #2. The PA findings are 

based on the information presented in Appendix A and Appendix B.

Findings

Three AOIs related to potential PFAS release were identified (Table 7-1) at the current AASF #2 

during the PA (Figure 7-1):

Table 7-1: AOIs at AASF #2

Area of Interest Name Used by Potential Release Date

AOI 1 Hangar Apron 

Areas PAARNG, USAR 1996 to current

AOI 2 Drainage Areas PAARNG, USAR, 

USMCR Potentially as early as 1996

AOI 3 Former Burn Area PAARNG, USAR, 

USMCR Approximately 2004 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 CSMs for AASF #2 are shown on 

Figures 6-2 through 6-4, which present the potential receptors and media impacted. 

The following areas discussed in Section 2 through Section 5 were determined to have no 

suspected release:

Table 7-2: No suspected Releases, AASF #2

No Suspected 

Release Area Used by Rationale for No Suspected Release Determination

Pump House #1 PAARNG The building contained AFFF storage, but there 

was no evidence of spillage. 

PAANG Facility PAANG

The facility does not appear to contain an 

aviation hangar and interviewees did not 

suspect the facility to have stored or used AFFF. 

Due to the mutual aid and/or property agreements between ARNG, USAR, USMCR, JCCA, and 

Richland Township Fire Department, there is a potential for off-facility sources of PFAS in the local 

area. Table 7-3 summarizes the entities associated with each site considered under this 

investigation. 
Table 7-3: Site Features and Associated Entities, AASF #2

Site Feature Site Description Pennsylvania Army National

Guard (ARNG)

US Army Reserve

(USAR)

US Marine Corps

Reserve (USMCR)

Johnstown-Cambria

County Airport (JCCA)

Aircraft Rescue and

Firefighting (ARFF)

Richland Township

Fire Department

Building 292 Hangar with an AFFF fire suppression system.

Multiple AFFF releases confirmed either through

testing or accidental trips.

Approximate Timeline of Events

1996: Building built and first AFFF fire suppression

system test (before occupation)

1998/1999: Release or test filled AFFF pond with

foam

2003: System tested where AFFF was discharged

into lined dumpster and then carted off-site

2003-2010: System tested twice. AFFF discharged

into lined dumpster and carted off-site.

2007: Leaky valve filled 3/4 of hangar with AFFF

Current: Drip leak from AFFF pipe

Status: suspected release

Dates: multiple (see above)

•Joint USAR and ARNG space

from 1997-2007, but primarily

ARNG occupation.

•Only ARNG occupation after 2007.

ARNG stored fire crash trucks in

Building 292 hangar.

•Designated for ARNG use in 2010

land lease

•Joint USAR and ARNG

space from 1997-2007,

but primarily ARNG

occupation.

•According to the

support agreement

between USAR and

ARNG, the USAR was

responsible for the

monitoring,

maintenance, and repair

of the AFFF fire

suppression system

Building 288 Hangar with an AFFF fire suppression system.

Multiple AFFF releases confirmed through testing.

Approximate Timeline of Events

1999/2000: Building built

2003: System tested where AFFF was discharged

into lined dumpster and then carted off-site

2004/05: Minor break of pipe line carrying AFFF,

releasing ~10 gallons into drain

2003-2010: System tested twice. AFFF discharged

into lined dumpster and carted off-site.

Status: suspected release

Dates: multiple (see above)

•ARNG moved into hangar in July

2017.

•Will become joint USAR and

ARNG space. USAR will use the

space as a motor pool.

•USAR occupied the

building after USMCR

(beginning 2009?) until

June 2017.

•Will become joint

USAR and ARNG

space. USAR will use

the space as a motor

pool.

•Occupied first by

USMCR from

1999/2000 until 2009.

•According to USAR

personnel, USMCR

only kept and used

Halon fire

extinguishers.

Pump House #1 Contains engines, pumps, and four 55-gallon drums of

AFFF for fire suppression system support of Buildings

292 and 288.

Status: no suspected release.

Stated in 2010 ECOP report that

the building was used by ARNG

Tri-Max Service Area Trimaxes were serviced with AFFF in the area beside

Pump House #1. Spillage reportedly occurred during

servicing and was left in place.

Status: suspected release

Dates: early 2000s to 2017/2018 (coinciding with

dates that Trimaxes were at facility)

ARNG personnel reported

servicing Trimaxes in the area.

ARNG owned ~20 Trimaxes, but

when ARNG got rid of Trimaxes,

they gave some to USAR and the

rest are stored currently at FTIG.

33
Table 7-3: Site Features and Associated Entities, AASF #2

Site Feature Site Description Pennsylvania Army National

Guard (ARNG)

US Army Reserve

(USAR)

US Marine Corps

Reserve (USMCR)

Johnstown-Cambria

County Airport (JCCA)

Aircraft Rescue and

Firefighting (ARFF)

Richland Township

Fire Department

Hangar Apron/Tarmac Tarmac was used for familiarization training and

nozzle testing by ARNG. It is also the area where

ARNG purged all excess AFFF from Trimaxes and fire

crash trucks when they were getting ready to turn in

the Trimaxes and trucks. Currently, airfield is

equipped with Purple K extinguishers.

Status: suspected release

Dates: 1999/2000-2017/2018

•Designated 3,247 square yards of

hangar apron for ARNG use in

2010 land lease

•ARNG personnel reported

conducting familiarization training

every 3-4 years with Trimaxes

containing AFFF in grassy area

just beyond tarmac. They also did

nozzle testing with fire crash trucks

containing AFFF in the same

southeastern corner of tarmac. Fire

crash trucks sat unused after 2013

and ARNG recently got rid of them

•When ARNG got rid of the

Trimaxes and fire crash trucks,

they purged all AFFF into drains in

airfield.

In the 2010 Proposed

Site Plan, ramp in front

of Building 292 is

shared between ARNG

and USAR

In the 2010 Proposed

Site Plan, ramp in front

of Building 288 is

labeled "USMCR

Ramp"

Former Burn Area Burn area was a former FTA used by USAR, USMCR,

and ARNG. ARNG stated that they only used

Trimaxes filled with water and burned paper

documents. It is unknown what USAR and USMCR

activities were in the area. Area was regraded, paved

over, and turned into a motor pool in ~2010.

Status: suspected release (due to uncertainty)

Dates: 2004 to 2010

•ARNG currently uses the area as

a fenced motor pool but this will

soon be turned over to USAR

•Joint usage of area by ARNG,

USAR, and USMCR

•USAR has plans to

reacquire this property

from ARNG

•Joint usage of area by

ARNG, USAR, and

USMCR

•Joint usage of area by

ARNG, USAR, and

USMCR

AFFF Pond (secondary

containment area)

AFFF Pond is a stormwater detention pond that has

previously been observed to contain AFFF; thus, it has

been coined the name "AFFF Pond". If the fire alarm

system trips in Building 292 and Building 288, the

drains in the buildings lead through oil water

separators and then into the AFFF Pond.

Status: suspected release

Dates: multiple (see Building 292)

ARNG activities in Buildings 292

and 288 may have contributed to

PFAS contamination.

USAR activities in

Buildings 292 and 288

may have contributed to

PFAS contamination.

34
Table 7-3: Site Features and Associated Entities, AASF #2

Site Feature Site Description Pennsylvania Army National

Guard (ARNG)

US Army Reserve

(USAR)

US Marine Corps

Reserve (USMCR)

Johnstown-Cambria

County Airport (JCCA)

Aircraft Rescue and

Firefighting (ARFF)

Richland Township

Fire Department

Drainage Ditch and Detention Pond

(secondary containment area)

A drainage ditch leads into a second stormwater

detention pond. AFFF has previously been observed

in the drainage ditch. The drainage ditch/ detention

pond captures drainage from the flight line/ tarmac.

Status: suspected release

Dates: multiple (see Building 292, Building 288, and

Flight Line/ Tarmac)

ARNG activities at the flight line/

tarmac may have contributed to

PFAS contamination.

The drainage ditch and

detention pond also

receives drainage from

USAR areas.

The drainage ditch and

detention pond also

receives drainage from

USMCR areas.

Runway 15/33 (adjacent source) Runway 15/33 is on JCCA property but is shared

between civilian and military aircraft. Multiple civilian

aircraft crashes and emergency responses involving

AFFF have been reported throughout the years on the

runway.

Approximate Timeline of Events

1974: Commercial airplane crash, AFFF response

and exact location unknown

2006: Commercial airplane crash, AFFF response by

municipal and ARNG fire departments

2008: Cessna airplane involving fuel spill and AFFF

response by municipal fire departments, location

unknown and records not found

2012: Private aircraft landing gear accident, runway

foamed by municipal and ARNG fire departments

Status: suspected release

Dates: multiple (see above)

•Until 2011, ARNG was in a mutual

aid agreement with the ARFF and

Richland Township Fire

Department to provide emergency

support services for all aircraft

emergencies regardless if aircraft

is civilian or military. After 2011,

ARNG declared they no longer had

the appropriate resources to

respond to emergencies in

accordance with the agreement.

•Confirmed involvement in 2006

crash and 2012 landing gear

incident

ARFF has been involved in

all aircraft emergencies

and is the primary first

responder.

Richland Township Fire

Department has been

involved in all aircraft

emergencies and is the

primary first responder.

ARFF (adjacent source) ARFF maintenance facility and AFFF testing area

indicated in the left picture. ARFF does AFFF testing

biannually for FAA regulations.

Status: suspected release

Dates: 2005 to present

JCCA ARFF conducts

AFFF testing biannually for

FAA regulations in area

outside of maintenance

facility. Testing records go

back to 2005.

35
Table 7-3: Site Features and Associated Entities, AASF #2

Site Feature Site Description Pennsylvania Army National

Guard (ARNG)

US Army Reserve

(USAR)

US Marine Corps

Reserve (USMCR)

Johnstown-Cambria

County Airport (JCCA)

Aircraft Rescue and

Firefighting (ARFF)

Richland Township

Fire Department

Pennyslvania Air National Guard

(PAANG) (adjacent source)

No off-facility visual site inspection conducted, but

interviewees did not suspect PAANG to contain AFFF

at facility. Facility does not appear to contain an

aviation hangar. PAANG facility is home to the 258th

Air Traffic Control Squadron, which controls civilian

and military air traffic for JCCA.

Status: no suspected release

Richland Township Fire

Department

(adjacent source)

Richland Township Fire Department borders JCCA to

the south and is in agreement with the JCCA and

ARNG to provide support for emergencies.

Status: suspected release

No off-facility visual site

inspection conducted,

but Richland Township

Fire Department is

known to contain AFFF

resources due to

involvement in JCCA

emergency responses.

36
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

37

Uncertainties

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

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

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

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

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

The conclusions of this PA are 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. Gathered information has a degree of uncertainty due to the absence of written 

documentation, the limited number of personnel with direct knowledge due to staffing changes, 

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

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

of releases, and the concentration of AFFF used. There is also a possibility the PA has missed a 

source of PFAS, as the science of how PFAS may enter the environment continually evolves.

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.

The following Table 7-4 summarizes the uncertainties associated with the PA:

Table 7-4: Summary of Uncertainties

Area of Interest Source of Uncertainty

AOI 1: Hangar Apron Areas The exact dates and details of some of the AFFF releases 

from the fire suppression system are unknown. Additionally, 

the interviewees did not specify exact locations within the 

hangar apron where AFFF was released for disposal. 

AOI 2: Drainage Areas The AFFF Pond has a valving system by which the water can 

be drained through a ditch into the second off-facility 

stormwater detention pond (HDR, 2016); however, it is 

unknown in what instances this migration pathway would 

have occurred between the two detention ponds. Additionally, 

general uncertainty about drainage pathways and diverter 

valve connections exists due to conflicting information 

received from reviewed documentation and site interviews. 

AOI 3: Former Burn Area It is unknown if the fire training activities involved AFFF or 

some other type of firefighting foam. USAR and USMCR 

activities at the Former Burn Area are unknown. 

Potential Future Actions

Based on the documented absence (1997 to present) of the use or release of AFFF from Pump 

House #1, evidence does not indicate that current or former ARNG activities having contributed 

PFAS contamination to soil, groundwater, surface water, or sediment at this location. This location 

will not move forward in the CERCLA process.
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

38

Interviews and records (covering 1997 to present) indicate that current or former ARNG activities

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

the preliminary CSM developed for the AOI, there is potential for receptors to be exposed to PFAS

contamination in soil, groundwater, surface water, and sediment at these AOIs. Table 7-5

summarizes the rationale used to determine if the AOIs should be considered for further

investigation under the CERCLA process and undergo an SI.
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

39

Table 7-5: PA Findings Summary

Area of Interest AOI Location Rationale Potential

Future Action

AOI 1: Hangar

Apron Areas

40°19’15.7”N; 

78°50’40.7”W

Confirmed location of AFFF

releases from fire suppression

system, nozzle testing,

familiarization training, Tri-MaxTM

servicing, and excess AFFF

disposal.

Proceed to an

SI, focus on soil,

groundwater,

surface water,

sediment

AOI 2: Drainage

Areas

40°19’15.7”N; 

78°50’46.7”W

USAR and PAARNG personnel

have reported seeing AFFF in

the AFFF Pond and the drainage

ditch during the years of facility

operation. The AFFF Pond

captures drainage from Building

292 when the fire alarm system

is triggered. The drainage ditch

captures drainage from Building

292 when the fire alarm system

is not triggered, the hangar

apron, and Building 288.

Proceed to an

SI, focus on

groundwater,

surface water,

sediment

AOI 3: Former

Burn Area

40°19’12.4”N; 

78°50’49.9”W

Confirmed location of fire training

activities by PAARNG, USAR,

and USMCR.

Proceed to an

SI, focus on soil,

groundwater,

surface water,

sediment

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.
Richland Township Fire Station

Hangar Apron

Former Burn Area

AFFF Pond

Building 292

JCCA ARFF

Runway 15/33

Drainage Ditch to Detention Pond

Drainage Ditch

Building 288

Pump House #1

Pennsylvania Air

National Guard Facility

Tri-Max Service Area

Sandy

Run

Clapboard Run

Solomon Run

AOI 3

AOI 2

AOI 1

­ Figure 7-1

CLIENT

REVISED

SCALE

PROJECT

ARNG

Preliminary Assessment for PFAS at Johnstown AASF #2, PA

7/15/2020

7/15/2020

7/15/2020

MS

ST

RG

GIS BY

CHK BY

PM

Base Map: Sources: Esri, HERE, Garmin, USGS, Intermap, INCREMENT P, NRCan,

Esri Japan, METI, Esri China (Hong Kong), Esri Korea, Esri (Thailand), NGCC, (c)

7/15/2020

1:12,000

C:\Users\stankevichm\OneDrive - AECOM Directory\ARNG_PFAS_GIS_60552172\MXDs\PA\Johnstown_AASF2\Fig_7-1_Johnstown_AASAF2_Summary.mxd

Area of Interest

Potential PFAS Release

No Suspected Release

Estimated Facility Boundary

Facility Boundary

Water Body

River/Stream

Summary of Findings

12420 Milestone Center Drive

Germantown, MD 20876

0 500 1,000 2,000

Feet

40
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

41

8. References

AMEC Earth & Environmental, Inc. (AMEC), 2003. Final Environmental Assessment of Changes

in Helicopter Operations by the Pennsylvania Army National Guard at Johnstown Cambria County

Airport, Johnstown, Pennsylvania. February.

Army Public Health Center, 2018. Pennsylvania Army National Guard Installation Compatible Use

Zone Study. December.

Commonwealth of Pennsylvania, 2018. Physiographic Provinces of Pennsylvania.

http://www.docs.dcnr.pa.gov/cs/groups/public/documents/document/dcnr_016202.pdf?_sm_au_

=iVVt1rjsP0fRRvZPkMMGvK6FH3tTM (Accessed October 2019).

HDR, 2016. Spill Prevention, Control, and Countermeasures Plan, Johnstown Complex (PA051)

Johnstown, Pennsylvania, U.S. Army Reserve HQ 99th RSC. September.

Highland Sewer and Water Authority, 2019. Where Does Your Water Come From.

https://www.highlandwater.net/where-your-water-comes-from (Accessed October 2019).

Kathryn’s Report, 2012. “More details on wheels-up landing at John Murtha Johnstown-Cambria

County Airport (KJST), Johnstown, Pennsylvania.” Kathryn’s Report. 6 March.

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

Practice. January.

National Park Service, 2018. Geologic Map of Johnstown Flood National Memorial, Pennsylvania.

https://irma.nps.gov/DataStore/DownloadFile/603761 (Accessed October 2019).

National Transportation Safety Board [NTSB], 1975. Aircraft Accident Report: Air East,

Incorporated. Beechcraft 99A, N125AE, Johnstown-Cambria County Airport, Johnstown,

Pennsylvania, January 6, 1974, PB-239 891. January.

NTSB, n.d. NTSB Identification: NYC07FA051.

https://www.ntsb.gov/_layouts/ntsb.aviation/brief2.aspx?ev_id=20070105X00011&ntsbno=NYC0

7FA051&akey=1 (Accessed October 2019).

National Weather Service, 2019. Climatological Report (Annual), State College PA.

https://w2.weather.gov/climate/getclimate.php?wfo=ctp (Accessed October 2019).

Pennsylvania Air National Guard (PAANG), 2008. The 258th Air Traffic Control Squadron.

https://www.171arw.ang.af.mil/About-Us/Fact-Sheets/Display/Article/451532/the-258th-airtraffic-control-squadron/ (Accessed October 2019).

Pennsylvania Department of Conservation & Natural Resources, n.d. Pennsylvania Groundwater

Information System.

(https://www.dcnr.pa.gov/Conservation/Water/Groundwater/PAGroundwaterInformationSystem/

Pages/default.aspx) (Accessed October 2019).

Phalen, W.C. and Martin, L., 1911. Mineral Resources of Johnstown, Pennsylvania and Vicinity.

United States Geological Survey Bulletin 447.

Skelly and Loy, Inc., 2010. Final Environmental Condition of Property Environmental Site

Assessment, Johnstown Army Aviation Support Facility, Richland and Conemaugh Townships,

Cambria Coun20ty, Pennsylvania. January.

Southwestern Cambria County Water Authority, 2018. 2018 Annual Drinking Water Quality

Report, PWSID #4110041.
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

42

https://goh2o.net/sites/default/files/files/129/10984/swcambriacountyccr2018.pdf?reload=May23-2019_12-27-28-pm (Accessed May 2020).

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

Preliminary Assessments under CERCLA. September.

US Army Public Health Center for Health Promotion and Preventive Medicine (USACHPPM),

2006. Pennsylvania Army National Guard Operational Noise Management Plan. January.
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

Appendix A

Data Resources
PFAS Preliminary Assessment Report

Johnstown AASF #2, Pennsylvania

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

Environmental Data Resources, Inc.TM Geocheck Report

· 2019 Environmental Data Resources, Inc.TM Geocheck Report for AASF #2, Pennsylvania

Leasing Information

· 1991 Land Lease Between Johnstown Cambria Airport Authority and the United States of

America, Lease No. DACA-31-5-91-274

· 1994 Land Lease Between Wilmore Coal Company and the United States of America,

Lease No. DACA-31-5-94-589

· 1997 Supplemental Lease Agreement No. 1, Lease No.: DACA-31-5-91-274

· 1999 Supplemental Lease Agreement No. 2, Lease No.: DACA-31-5-91-274

· 2001 Supplemental Lease Agreement No. 3, Lease No.: DACA-31-5-91-274

· 2003 Supplemental Lease Agreement No. 4, Lease No.: DACA-31-5-91-274

· 2005 U.S. Government Lease for Real Property, Lease No. DACA-31-5-05-0471

· 2010 Department of the Army License for National Guard Purposes at Johnstown-Cambria,

Johnstown, Pennsylvania, License No. DACA-31-3-10-240.

· 2010 Proposed Site Plan Map

· Johnstown Airport Legal Agreements

· Proposed Site/Utility Plan, Johnstown AASF Construction of Longbow Crew Trainer Facility

· Real Estate Planning Map, Pennsylvania Air National Guard

· Ultimate Airport Layout Plan, John Murtha Johnstown-Cambria County Airport

Miscellaneous

· Site Layout and Source Areas/Drainage Patterns Figures

· Stormwater and Industrial Conveyance System Figure

PAARNG Environmental Management Plans

· 2006 Pennsylvania Army National Guard, Statewide Operational Noise Management Plan

· 2016 Spill Prevention, Control, and Countermeasures Plan, Johnstown Complex (PA051)

Johnstown, Pennsylvania

PAARNG Mutual Aid Agreements

· 1997 Support Agreement, Agreement No. W25ASN-98029-001

· 2007 Airport Joint Use Agreement

· 2010 Support Agreement, Agreement No. W25ASN-98029-002

· 2011 Letter of Agreement Between Cambria County Department of Emergency Services

and Johnstown-Cambria County Airport Authority (JCCAA), 258th Air Traffic Control

Squadron (PAANG), Army Aviation Support Facility #2 (PAARNG), Marine Corp Reserve

Training Center, Richland Fire Department, Richland Police Department
PFAS Preliminary Assessment Report

Johnstown AASF #2, Pennsylvania

Previous Investigations Completed at AASF #2

· 2010 Final Environmental Condition of Property, Environmental Site Assessment,

Johnstown Army Aviation Support Facility, Richland and Conemaugh Townships, Cambria

County, Pennsylvania

· 2018 Pennsylvania Army National Guard, Installation Compatible Use Zone Study

Stormwater Permit Determinations

· 2017 Memorandum from Christopher Kriley (Pennsylvania Department of Environmental

Protection) to Mr. Don Paul (Department of Military & Veterans Affairs), RE: Permit

Determination, Pennsylvania Army National Guard Facilities
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

Appendix B

Preliminary Assessment Documentation
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

Appendix B.1

Interview Records
PA Interview Questionnaire - Other Facility:__Johnstown AASF #2

Interviewer:__ __________

Date/Time:__8/27/19_________

Interviewee:___ (JCCA)____

Title:__Maintenance Supervisor __________

Phone Number:_________________________

Email:_______________________________

Can your name/role be used in the PA Report? Y or N

Can you recommend anyone we can interview?

Y or N __________________________

Roles or activities with the Facility/Years working at the Facility:

Has been in maintenance and operations at the Cambria County Airport Rescue Firefighting (ARFF) for 11

years

PFAS Use: Identify accidental/intentional release locations, time frame of release, frequency of releases,

storage container size (maintenance, fire training, firefighting, buildings with suppression systems (as

builts), fueling stations, crash sites, pest management, recreational, dining facilities, metals plating, or

waterproofing). How are materials ordered/purchased/disposed/shared with others?

FAA regulations require the ARFF to discharge/test the AFFF twice a year. They

discharge 6% AFFF twice a year outside the maintenance facility.

Known Uses

They also do a response test for FAA annually but only with water. Use

They train with water only. Procurement

During FAA testing of AFFF, typically <5 gallons of concentrated AFFF are

released. The firetrucks then hose down the area with water, and the testing area

drains to a retention pond.

Disposition

Testing records go back to 2005. Storage (Mixed)

The facility contains 2 firetrucks with 60-gallon foam tank capacities each. Storage (Solution)

They have AFFF in 200-gallon barrels and buckets. Brands include National Foam

and Chemguard Milspec.

Inventory, Off-Spec

They do an annual timed emergency response training with ARNG. They have a

mutual aid response agreement with Richland Fire Department and ARNG.

Containment

In 2008/2009, there was an accident with an aircraft. This involved a fuel spill and

there was an unknown amount of foam released. The cleanup method is unknown.

There is no incident report available.

SOP on Filling

Confirmed the location of the 2012 landing gear incident. Leaking Vehicles

Both responses involved Richland Fire Department and possibly ARNG response

too.

Nozzle and Suppression

System Testing
PA Interview Questionnaire - Other Facility:__Johnstown AASF #2

Interviewer:__ ___________

Date/Time:__8/27/19_________

December 26, 2006, there was an aircraft crash which also had a foam response. Dining Facilities

Vehicle Washing

Ramp Washing

Fuel Spill Washing and

Fueling Stations

Chrome Plating or

Waterproofing
PA Interview Questionnaire - Other Facility:_Johnstown AASF #2__

Interviewer:___ __________

Date/Time:___8/27/19_______

Interviewee:__ (PAARNG)____

Title:__Electronics Mechanic Supervisor___

Phone Number:_________________________

Email:_______________________________

Can your name/role be used in the PA Report? Y or N

Can you recommend anyone we can interview?

Y or N __________________________

Roles or activities with the Facility/Years working at the Facility:

Been at facility since 2000

PFAS Use: Identify accidental/intentional release locations, time frame of release, frequency of releases,

storage container size (maintenance, fire training, firefighting, buildings with suppression systems (as

builts), fueling stations, crash sites, pest management, recreational, dining facilities, metals plating, or

waterproofing). How are materials ordered/purchased/disposed/shared with others?

At Bldg 292, there was AFFF coming out of a valve. The Richland Fire Department

(municipal) came and hosed down the foam and helped to contain it.

Known Uses

The foam filled 3⁄4 of the hangar and was about 4 ft high, but most of it went down

the drains in the hangar. It is unlikely that AFFF went out of the hangar. This

occurred in ~2007.

Use

A contractor came in and fixed the broken valve and recharged the tank. Procurement

The clean up process was that they tried to push the foam towards the center of the

hangar with squeegees. There was still residual foam for months after the incident

because the floor would be sticky and you could see footprints of white residue

outside the hangar.

Disposition

The Richland Fire Department responds to structure fires. The Cambria County

Airport fire department responds to aircraft emergencies.

Storage (Mixed)

Storage (Solution)

Inventory, Off-Spec

Containment

SOP on Filling

Leaking Vehicles

Nozzle and Suppression

System Testing

Dining Facilities
PA Interview Questionnaire - Other Facility:_Johnstown AASF #2__

Interviewer:__ __________

Date/Time:___8/27/19_______

Vehicle Washing

Ramp Washing

Fuel Spill Washing and

Fueling Stations

Chrome Plating or

Waterproofing
PA Interview Questionnaire - Other Facility:_Johnstown AASF #2_

Interviewer:__ ___________

Date/Time:__8/27/19________

Interviewee:__see below (PAARNG)_______

Title:__________________________________

Phone Number:_________________________

Email:_______________________________

Can your name/role be used in the PA Report? Y or N

Can you recommend anyone we can interview?

Y or N __________________________

Roles or activities with the Facility/Years working at the Facility:

(Mechanic/Mechanic Supervisor) since 1997

 (Aircraft Mechanic/Fire Crew) since 1999

PFAS Use: Identify accidental/intentional release locations, time frame of release, frequency of releases,

storage container size (maintenance, fire training, firefighting, buildings with suppression systems (as

builts), fueling stations, crash sites, pest management, recreational, dining facilities, metals plating, or

waterproofing). How are materials ordered/purchased/disposed/shared with others?

(814-977-5007) (retired officer) was present during two testing events of

the AFFF fire suppression system in Bldg 292 that resulted in releases. The 1st testing

event occurred in ~1996/1997. It was unknown when 2nd testing event occurred.

Known Uses

A 3rd release event occurred at Bldg 292 when the system broke and foam went out

the hangar doors. This occurred in the past 10 years. This was a partial release from a

leaky valve. The foam was hosed down to the drain. (PAARNG) was

present during the incident and would be able to tell more information.

Use

Johnstown AASF #2 had Trimaxes that were filled with AFFF. They were required

to test the Trimaxes annually, but actually they were tested about every 3-4 years.

Trimaxes were tested on the southwestern corner of the airfield.

Procurement

The Trimaxes were received in the early 2000s. In ~2017/2018, they got rid of these

Trimaxes and purged all the remaining AFFF in the testing area.

Disposition

They indicated there was a burn area where they would conduct training with the

Trimaxes, but the Trimaxes were only filled with water.

Storage (Mixed)

All Trimaxes are currently at a warehouse in FTIG. There were ~20 Trimaxes but the

USAR took some of them.

Storage (Solution)

Trimaxes were serviced with AFFF in the area between Bldg 288 and Bldg 292.

Some spillage occurred but was just left on the pavement.

Inventory, Off-Spec

There was an incident where a landing gear wouldn’t retract so AASF response crew

foamed the runway. That occurred in ~2012.

Containment

Bldg 292 Hangar was built in 1996 and was occupied in 1997. SOP on Filling
PA Interview Questionnaire - Other Facility:_Johnstown AASF #2_

Interviewer:__ ___________

Date/Time:__8/27/19________

The AASF had firetrucks containing 3% and 6% AFFF. They never fired off the

foam after 2013 except emptying it out when they got rid of it recently. They got rid

of the AFFF by parking over the drains in the airfield and opening the bottom hatch

to release the foam.

Leaking Vehicles

The fire detachment team was just volunteer employees. They do not have to follow

FAA regulations to do fire training and have not had joint fire training exercises.

Nozzle and Suppression

System Testing

There was a red truck with a 50 gallon foam capacity and a crash truck with 75

gallon foam capacity. Both contained 3% AFFF. Prior to acquiring these trucks, they

had two other trucks that were yellow and contained 6% AFFF. They got rid of the

yellow trucks in 2006/2007.

Dining Facilities

There was an airplane accident in the civilian side, which was jointly responded to by

the municipal fire department and ARNG. AFFF was used. Crash occurred in

2006/2007.

Vehicle Washing

The runways were redone in ~2010. They excavated and refilled the soil and then

extended the runways.

Ramp Washing

The AFFF fire suppression systems in Bldgs 292 and 288 were tested and foam was

discharged into a lined dumpster in 2003. This dumpster was diluted with water,

covered with a tarp, and then a contractor carted it away and disposed of the material

off-site at a landfill. They recharged the system with ~ten 50-gallon drums of AFFF.

The system was tested twice after that (between 2003-2010) in both hangar

buildings.

Fuel Spill Washing and

Fueling Stations

 has Reserve Real Property information. Contact information Chrome Plating or

Waterproofing
PA Interview Questionnaire - Other Facility:_Johnstown AASF #2_

Interviewer:__ ___________

Date/Time:__8/27/19________

Interviewee:__ ______________

Title:__RFOS (USAR)__________________

Phone Number:_________________________

Email:_______________________________

Can your name/role be used in the PA Report? Y or N

Can you recommend anyone we can interview?

Y or N __________________________

Roles or activities with the Facility/Years working at the Facility:

Regional Facility Operations Supervisor with the 99th USAR since 2000

He handles everything maintenance related

PFAS Use: Identify accidental/intentional release locations, time frame of release, frequency of releases,

storage container size (maintenance, fire training, firefighting, buildings with suppression systems (as

builts), fueling stations, crash sites, pest management, recreational, dining facilities, metals plating, or

waterproofing). How are materials ordered/purchased/disposed/shared with others?

USAR C-12 unit (fixed wing) operations from 1997-2007. Known Uses

Bldg 288 was built in 1999/2000 with an AFFF fire suppression system in hangar.

The Marine occupied the building until 2009, and then it became USAR property.

Use

He believes the Marines used Halon fire extinguishers. Procurement

The burn area (indicated on map) was used between 2004 and 2010. Three entities

shared the burn area: Marines, USAR, and ARNG. The burn area is a potential FTA.

Disposition

The Marines helicopter crashed into Bldg 288. There weren’t more details on this but

it appears this didn’t lead to any type of AFFF release or response.

Storage (Mixed)

There was a minor break in a pipeline containing concentrate foam in the Bldg 288

tank room in 2004/2005. The foam was pushed down the floor drains and about 10

gallons was released.

Storage (Solution)

Inventory, Off-Spec

Containment

SOP on Filling

Leaking Vehicles

Nozzle and Suppression

System Testing

Dining Facilities

Vehicle Washing
PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

Appendix B.2

Visual Site Inspection Checklists
















PFAS Preliminary Assessment Report

Johnstown AASF #2,

Johnstown, Pennsylvania

Appendix B.3

Conceptual Site Model Information
Preliminary Assessment – Conceptual Site Model Information

Site Name: Johnstown AASF #2

Why has this location been identified as a site?

The facility is an Army Aviation Support Facility (AASF).

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

Joint military use of property by US Army Reserves and US Marine Corps Reserve. Facility is also near

Johnstown-Cambria County Airport.

Training Events

Have any training events with AFFF occurred at this site? Yes

If so, how often? Every 3-4 years they did familiarization training and nozzle testing

How much material was used? Is it documented? Not documented

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:

Surface water flow direction? Towards stormwater detention ponds and tributaries of Solomon Run

Average rainfall? 41 inches

Any flooding during rainy season? No

Direct or indirect pathway to ditches? Direct pathway to drainage ditch

Direct or indirect pathway to larger bodies of water? Indirect pathway to Solomon Run through

tributaries and perennial streams

Does surface water pond any place on site? There are two stormwater detention ponds

Any impoundment areas or retention ponds? Yes

Any NPDES location points near the site? No

How does surface water drain on and around the flight line? Flight line drains lead through OWS and

then to drainage ditch
Preliminary Assessment – Conceptual Site Model Information

Groundwater:

Groundwater flow direction? Follows topographic gradient but generally towards northwest

Depth to groundwater? ~10-15 ft bgs

Uses (agricultural, drinking water, irrigation)? Not within facility

Any groundwater treatment systems? No

Any groundwater monitoring well locations near the site? No

Is groundwater used for drinking water? No

Are there drinking water supply wells on installation? No

Do they serve off-post populations? No

Are there off-post drinking water wells downgradient? No

Waste Water Treatment Plant:

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

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

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

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

Equipment Rinse Water

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

No

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

use? Where does the rinse water flow after cleaning nozzles?

Nozzles tested on tarmac and drainage from tarmac goes into the drainage ditch leading into a

stormwater detention pond.

3. Other?
Preliminary Assessment – Conceptual Site Model Information

Identify Potential Receptors:

Site Worker -> Yes

Construction Worker -> Yes

Recreational User -> Potentially if trespassing

Residential ->

Child -> No

Ecological -> Yes

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

Airport, forested areas, some residences

Documentation

Ask for Engineering drawings (if applicable).

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

Johnstown AASF #2,

Johnstown, Pennsylvania

Appendix C

Photographic Log
Appendix C - Photographic Log

Army National Guard, Preliminary

Assessment for PFAS

Johnstown AASF #2 Johnstown, PA

Preliminary Assessment Report

Johnstown AASF #2

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

Photograph No. 1

Description:

The hangar apron was

previously used by ARNG for

familiarization training and

nozzle testing with AFFF. All

excess AFFF was also purged

into the apron drains.

Orientation:

Southeast

Date 8/27/2019

Time 9:14

Photograph No. 2

Description:

The hangar apron is currently

equipped with Purple K (nonAFFF) fire extinguishers.

Previously, Tri-Max fire

extinguishers containing

AFFF were stationed on the

apron.

Orientation:

Northwest

Date 8/27/2019

Time 9:17

AECOM Page 1 of 5
Appendix C - Photographic Log

Army National Guard, Preliminary

Assessment for PFAS

Johnstown AASF #2 Johnstown, PA

Preliminary Assessment Report

Johnstown AASF #2

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

Photograph No. 3

Description:

The AFFF Pond is a

stormwater detention pond

that has been identified in asbuilt drawings as a fire

protection discharge holding

area. AFFF has previously

been observed in the AFFF

Pond.

Orientation:

West

Date 8/27/2019

Time 9:35

Photograph No. 4

Description:

The AFFF fire suppression

system tanks for Building 292

are shown. The tanks have a

1,200-gallon capacity and are

filled with National Foam AerO-Water 3EM 3% AFFF.

Orientation:

North

Date 8/27/2019

Time 9:47

AECOM Page 2 of 5
Appendix C - Photographic Log

Army National Guard, Preliminary

Assessment for PFAS

Johnstown AASF #2 Johnstown, PA

Preliminary Assessment Report

Johnstown AASF #2

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

Photograph No. 5

Description:

A pipe in the Building 292

tank room is shown to be

leaking AFFF. Corrosion of

the concrete pavement below

the leakage is observed.

Orientation:

Southeast

Date 8/27/2019

Time 9:51

Photograph No. 6

Description:

Floor drains in Building 292

lead through an oil water

separator and then drain into

either the AFFF Pond or the

sanitary sewer.

Orientation:

Southwest

Date 8/27/2019

Time 9:49

AECOM Page 3 of 5
Appendix C - Photographic Log

Army National Guard, Preliminary

Assessment for PFAS

Johnstown AASF #2 Johnstown, PA

Preliminary Assessment Report

Johnstown AASF #2

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

Photograph No. 7

Description:

In accordance with FAA

regulations, the ARFF tests

AFFF systems from their

firetrucks at a biannual

frequency. The AFFF is

discharged into a grassy field

beside a taxiway.

Orientation:

Southwest

Date 8/27/2019

Time 12:25

Photograph No. 8

Description:

Four 55-gallon drums of

AFFF are observed stored in

Pump House #1. The AFFF is

of the brand and type National

Foam Aer-O-Water 3EM 3%.

Orientation:

South

Date 8/27/2019

Time 12:52

AECOM Page 4 of 5
Appendix C - Photographic Log

Army National Guard, Preliminary

Assessment for PFAS

Johnstown AASF #2 Johnstown, PA

Preliminary Assessment Report

Johnstown AASF #2

Perfluorooctane-Sulfonic Acid (PFOS) and

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

Photograph No. 9

Description:

The drainage ditch leads into

a second off-facility

stormwater detention pond.

AFFF has previously been

observed in the drainage ditch.

Orientation:

Northwest

Date 8/27/2019

Time 13:07

AECOM Page 5 of 5