FINAL

Preliminary Assessment Report

Papago Park Military Reservation

Phoenix, Arizona

Perfluorooctanesulfonic Acid (PFOS) and Perfluorooctanoic 

Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

September 2020

Prepared for:

Army National Guard Bureau

111 S. George Mason Drive

Arlington, VA 22204

UNCLASSIFIED
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

i

Table of Contents

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

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

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

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

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

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

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

1.5.1 Geology ......................................................................................................... 7

1.5.2 Hydrogeology ................................................................................................. 8

1.5.3 Hydrology ....................................................................................................... 8

1.5.4 Current and Future Land Use ......................................................................... 9

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

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

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

3.1 Building M5201 ....................................................................................................... 15

3.2 Runway (M5228) & Rotary Wing Parking Apron (M5204)........................................ 15

3.3 Mobile Fire Extinguishers at Fuel Point Station ....................................................... 15

3.4 Former Storage Area Building M5201Exterior ......................................................... 16

4. Emergency Response Areas ............................................................................................ 18

5. Adjacent Sources ............................................................................................................. 19

5.1 Motorola 52ND Street Superfund Site (Currently, ON Semiconductor) ...................... 19

6. Preliminary Conceptual Site Model .................................................................................. 21

6.1 AOI 1: Army Aviation and Support Facility #1 and Vicinity ...................................... 21

7. Conclusions ..................................................................................................................... 25

7.1 Findings .................................................................................................................. 25

7.2 Uncertainties ........................................................................................................... 25

7.3 Potential Future Actions .......................................................................................... 26

8. References ...................................................................................................................... 28
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

ii

Figures

Figure ES-1 Summary of Findings

Figure ES-2 

Figure 1-1 

Figure 1-2 

Figure 1-3 

Figure 2-1 

Figure 3-1 

Figure 5-1 

Figure 6-1 

Figure 6-2 

Figure 7-1 

Preliminary Conceptual Site Model, Papago Park Military Reservation, AZ

Facility Location

Geology and Groundwater Features

Surface Water Features

Fire Training Area

Non-Fire Training Areas

Adjacent Source

Area of Interest

Preliminary Conceptual Site Model, Papago Park Military Reservation, AZ

Summary of Findings

Tables

Table ES-1 Areas of Interest at Papago Park Military Reservation

Table 7-1 Areas of Interest at Papago Park Military Reservation

Table 7-2 Uncertainties within the PA

Table 7-3 PA Findings Summary

Appendices

Appendix A Data Resources

Appendix B Preliminary Assessment Documentation

B.1 Interview Records

B.2 Visual Site Inspection Checklists

B.3 Conceptual Site Model Information

Appendix C Photographic Log
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

iii

Acronyms and Abbreviations

AASF Army Aviation Support Facility

ADEQ Arizona Department of Environmental Quality

AECOM AECOM Technical Services, Inc.

AFFF aqueous film forming foam

AOI

ARNG

Area of Interest

Army National Guard

AZ Arizona

AZARNG Arizona Army National Guard

bgs below ground surface

CERCLA

CFR

Comprehensive Environmental Response, Compensation, and

LiabilityAct

Code of Federal Regulations

CSM conceptual site model

EDRTM Environmental Data Resources, Inc.TM

°F degrees Fahrenheit

FTA Fire Training Areas

ft feet

PA Preliminary Assessment

PFAS per- and poly-fluoroalkyl substances

PFOA perfluorooctanoic acid

PFOS perfluorooctanesulfonic acid

PPMR Papago Park Military Reservation

SI Site Inspection

SRP Salt River Project

UCMR3 Unregulated Contaminant Monitoring Rule 3

US United States

USACE United States Army Corps of Engineers

USEPA

VSI

United States Environmental Protection Agency

visual site inspection
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

1

Executive Summary

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

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

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

(PFAS)-containing materials was completed for Arizona ARNG (AZARNG) Papago Park Military

Reservation (PPMR; also referred to as the “facility”) in Phoenix, Arizona (AZ), to identify areas

of known or suspected releases known as areas of interest (AOIs) and possible exposure

pathways to receptors. 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 PA site visit on 7 November 2018 and completed visual site inspections

(VSIs) at locations where PFAS-containing materials were suspected of being stored, used,

or disposed;

· Interviewed current PPMR AZARNG personnel during the site visit and AZARNG

environmental managers and operations staff; 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.

During the PA, one AOI related to PFAS release was identified at PPMR based on PA data. The

AOI is shown on Figure ES-1 and described in Table ES-1 below:

Table ES-1: Areas of Interest at Papago Park Military Reservation

Area of

Interest Name Used by Potential ReleaseDates

AOI 1 Army Aviation Support Facility #1 and

Vicinity AZARNG mid 1990s – mid

2000s

Based on the PA findings, direct interviewee knowledge of releases at this facility, and a lack of

robust institutional knowledge regarding historical activities concerning AFFF use and storage at

the facility, there is potential for exposure to PFAS contamination in media at or near the facility.

The following are potential receptors: site workers (e.g., PPMR military and non-military staff and

visitors), onsite construction workers, trespassers, and off-site residents.

Ground-disturbing activities at the AOI could result in site worker, construction worker, and

trespasser exposure to suspected PFAS contamination via inhalation of dust or ingestion of

surface soil. In addition, several residences are located north, west, and south of the facility.

Nearby residents may be exposed to suspected PFAS contamination via inhalation of fugitive dust

from ground disturbing activities at the facility if a release occurred. Ground-disturbing activities

to surface soil could result in site and construction worker exposure. Construction workers may

also be exposure to subsurface soil. PFAS are water soluble and can migrate readily from soil to

groundwater or surface water via leaching and run-off. Groundwater beneath the facility ranges

from 6 to 42 feet (ft) below ground surface (bgs) but is not used for domestic water supply. Current

migration of PFAS from the suspected release area to surface water is unlikely based on the

direction and fate of surface water runoff on the facility. PPMR occupies the land on both the north
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

2

and south side of McDowell Road, and surface water runoff from the aviation area travels overland

and then enters a pipe that flows from the north side under East McDowell Road to a retention

basin directly on the south side of East McDowell Road. This runoff then either evaporates (due

to the high rates of evapotranspiration in Arizona) or infiltrates. Overall, the surface water to

drinking water pathway is considered incomplete due to the distance the water would need to

travel to reach a drinking water source, lack of perennial water, and high rates of

evapotranspiration.

Based on the USEPA Unregulated Contaminant Monitoring Rule 3 (UCMR3) data, it was indicated

that PFAS were detected in the City of Tempe public water system above the USEPA’s lifetime

Health Advisory (70 parts per trillion for PFOA and PFOS) within 5 miles of the facility. The UCMR3

data are included in Appendix A. 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. A summary of PA

findings is shown on Figure ES-1. The preliminary CSM for PPMR is shown on Figure ES-2.
Stormwater Retention Basin

Sediment Trap

Culvert SW of 5201

Culvert SE of 5201

Building M5201 Exterior

Building M5201

Motorola 52nd St Superfund Site

Mobile Fire Extinguishers

AOI 1

C:\Users\stankevichm\OneDrive - AECOM Directory\ARNG_PFAS_GIS_60552172\MXDs\AZ\Papago_Park_MR_Figures\Papago_Park_MR_PA_Figures\Fig_ES-1_Papago_Summary.mxd

0 450 900 1,800

Feet

Legend

Area of Interest

Potential PFAS Release

Facility Boundary

Summary of Findings

Figure ES-1 12420 Milestone Center Drive ­ Germantown, MD 20876

CLIENT

REVISED

SCALE

9/16/2020 MS

MW

9/16/2020

9/16/2020

ARNG

GIS BY

CHK BY

PROJECT Preliminary Assessment for PFAS at Papago Park Military Res, AZ

PM RG 9/16/2020

1:10,800

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

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

3
Source 

A011 

Potential 

Off-Facility 

Source Not 

under 

Control of 

ARNG 

f-+ 

Release 

Mechanism 

Possible Nozzle 

Testing, Potential 

Leaking Fire Truck 

and AFFF Storage 

System, Storm 

Drain/Culvert 

Discharge into 

Basin 

LEGEND 

-

----0 Flow-Chart Stops 

Flow-Chart Continues 

- - - - - + Partial / Possible Flow 

0 Incomplete Pathway 

Media 

PFAS in 

Surface Soil 

Transport 

and Migration 

Human 

Activities 

____ Predpi taion/

Run-Off 

Leaching/ 

Infil tration 

Notes: 

PATHWAY 

Media 

Airborne Soil 

particulate 

Surface Soil 

at AOI 

Surface 

Water/ 

sediment 

Subsurface 

Soil 

Groundwater 

1. The resident receptor refers to an

off-site resident.

0 Potentially Complete Pathway

• Compete Pathway

Expos ure 

Routes 

Inhalation of 

Dust 

Ingestion 

Ingestion 

Ingestion 

Ingestion 

RECEPTOR 

Human Receptors: 

Cur rent/ Future 

Site Construction Resident Worker Worker Trespasser 

0/0 0/0 0/0 0/0 

0/0 0/0 0/0 0/0 

0/0 0/0 0/0 0/0 

0/0 0/0 0/0 0/0 

I 010 I 010 I 010 I 010 I 

Site 

Worker 

Construction 

Worker Resident 

Figure ES-2 

Preliminary Conceptual Site Model 

Papago Park Military Reservation, AZ 

Trespasser 

4
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

5

1. Introduction

1.1 Authority and Purpose

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

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

acid (PFOA) 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 US Environmental Protection Agency (USEPA) issued lifetime

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

promulgated national standards regulating PFAS. In the absence of federal standards, some

States have adopted their own standards; however, the State of Arizona (AZ) does not currently

have promulgated standards for PFAS.

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

Park Military Reservation (PPMR; also referred to as the “facility”), AZ, 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 PPMR. The term PFAS will be used throughout

this report to encompass all PFAS chemicals being evaluated, including PFOS and PFOA, which

are key components of AFFF.

1.2 Preliminary Assessment Methods

The following tasks were performed as part 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 PA site visit on 07 November 2018 and completed visual site inspections

(VSIs) at locations where PFAS-containing materials were suspected of being stored, used,

or disposed.
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

6

· Interviewed current Arizona ARNG (AZARNG) personnel including environmental managers

and operations staff during the site visit

· 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.

1.3 Report Organization

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

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

of each are:

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

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

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

visit

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

at the facility identified during the site visit

· Section 4 – Emergency Response Areas: describes areas of suspected AFFF discharge

at the facility, specifically in response to emergency situations

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

the facility that are not under the control of ARNG

· Section 6 – Preliminary Conceptual Site Model: describes the pathways of suspected

PFAS transport and receptors at 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

1.4 Facility Location and Description

PPMR occupies approximately 480 acres in the eastern portion of Maricopa County, about 7 miles

east of downtown Phoenix and 1.5 miles from Phoenix Sky Harbor International Airport (Figure

1-1). The properties south and east of PPMR are public parks and recreational areas owned by

the City of Phoenix (Arizona Department of Environmental Quality [ADEQ], 2018). Residential

properties are to the east and south of PPMR.

PPMR has been an active military facility and rifle range since its congressional designation in

1930. PPMR serves as the Joint Forces Headquarters for the AZARNG and also hosts operational

National Guard units at the facility. The facility includes numerous structures, open storage areas,

and training areas, which are primarily located near the western portion of the facility. The current

and historical activities at the facility include training and administration, aircraft fueling and

maintenance activities, motor vehicle fueling and maintenance activities, fuel and solvent storage
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

7

areas, gunnery ranges, detonation areas, and bunkers. The AZARNG leases portions of the

facility to the US Air Force for administrative and training purposes (ADEQ, 2018). Historical

records indicate that a runway exists at the facility that is oriented 080°/260° and is 3,500 feet (ft)

long. According to the Department of Emergency and Military Affairs, this runway is abandoned

and has not been used by any fixed-wing aircraft for several decades. An active helicopter landing

pad and taxiway have operated at PPMR since 1974.

1.5 Facility Environmental Setting

PPMR is located in the central portion of Maricopa County, AZ, within the City of Phoenix, and is

approximately 1,242 ft above sea level. Major geographic features in this area are the Papago

Buttes to the east, the Salt River, which flows westerly about one mile to the south, the Old

Crosscut Canal, located along 46th Street, and the Grand Canal, which flows northwesterly

through the area west of 40th Street and Van Buren Street. The majority of the facility is developed

with buildings, concrete, and asphalt features, with exception of an area to the east, which is

undeveloped, and a retention basin that lies to the south-central portion of the facility.

1.5.1 Geology

PPMR is constructed on a Quaternary pediment (colluvium/alluvium) that originated from the

western and southwestern flanks of Barnes Butte. The pediment is the erosional remnant of the

upthrown fault block, which has been cut by several smaller northwest-trending faults (EEC,

2005).

Bedrock in the area around and including PPMR is covered by a thin colluvium/alluvium veneer

up to 30 ft thick in some areas. The bedrock is composed of calichified angular to subangular

sediments and rock fragments. Tertiary sedimentary rocks exposed at PPMR indicate a variation

of sediment sources and reflect separate lobes of alluvial fans that coalesce with and overlie each

other. The older, proximal facies are members of the Camel’s Head Formation (Stadium Breccia,

Barnes Butte Breccia, Zoo Breccia) and are typically very coarse and poorly stratified arkosic

breccias, having originated as talus, bud flows, and debris flows. Mid-fan facies are represented

by the Papago Park member and consist of water laid deposits that were interbedded with debris

flow deposits. Distal-facies are represented by the Tempe Beds, which are finer-grained, well

stratified, and well sorted (TechLaw, 2004).

Basement rocks beneath PPMR consist of Proterozoic Porphyritic Camelback granite and

metarhyolite. Larger feldspar crystals characterize the Camelback Granite. Metarhyolitic rocks

consist of gray to pink, blocky, low-grade, metamorphosed rhyolite, which are common throughout

the subsurface of PPMR (EEC, 2005).

The soils at PPMR are composed of fine- to medium-grained sands. Variable amounts of clay,

silt, and gravel are also present. Intervals of gravel or gravel and sand/silt mixtures are present at

depths greater than 10 ft below ground surface (bgs). The content of the gravel and sand is

indicative of weather and eroded material originating from proximal sources of exposed bedrock

around the facility. The thickness of soil/alluvium varies across PPMR; however, thicker deposits 

are typically found in the western portions of the facility (TechLaw, 2004).

In addition to the soil and alluvial material described above, many areas at PPMR have been

overlain with variable amounts of backfill or artificial cover during the operational history of the

facility. The types of artificial fill material found at PPMR range in content from pea gravel to

aggregate base course (TechLaw, 2004).
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

8

1.5.2 Hydrogeology

PPMR lies within the West Salt River Valley area of the Phoenix Active Management Area. Since

1947, groundwater extraction for irrigation has lowered groundwater levels and caused changes

in regional and local flow directions. Despite these changes, groundwater movement is still

primarily westward toward the Salt River and Gila Rivers (ADEQ, 2017). PPMR is on a bedrock

highland which is underlain by crystalline rock. Consequently, very little water, if any, is present

beneath the facility. Water-saturated layers have been historically identified at points near the

western margin of PPMR from 6 ft to 42 ft below grade; however, a continuous groundwater zone

does not appear to exist beneath most of the facility. Based on lithologic logs from historical

monitoring wells, the main occurrence of groundwater exists under unconfined conditions within

fractured Precambrian Camelback granite and/or metarhyolite. In some portions of PPMR, locally

perched groundwater layers are found in the artificial fill material and calichified pediment

colluvium/alluvium (EEC, 2005).

According to data received from ADEQ and the EDRTM report for the facility, several dozen wells

are located within a one-mile radius of the facility. Outside of the facility, most of these wells are

classified as monitoring wells, but several are listed as exempt, non-exempt, or other type of wells

(Figure 1-2). Records from AZDEMA indicate that there are 25 monitoring wells, and no drinking

water or irrigation wells present at the facility or downgradient of the facility. The State of Arizona

describes exempt wells as small, non-irrigation wells typically used to provide water for domestic

purposes, and non-exempt wells as a well drilled within an Active Management Area pursuant to

different groundwater rights.

1.5.3 Hydrology

The City of Phoenix’s water supply comes primarily from the Salt River Project (SRP), which

brings water by canal and pipeline from the Salt and Verde Rivers, and the Central Arizona

Project, which transports Colorado River water. Approximately 3% of the water supply comes from

groundwater. The City of Phoenix also uses a portion of its reclaimed effluent to maintain parks

and for recharging local groundwater aquifers. The surface water near PPMR flows generally

northeast to southwest (TechLaw, 2004).

The Salt River is the principal drainage feature of the Phoenix Basin and is the nearest surface

water body to the facility, approximately 2.5 miles south of PPMR. The Salt River is typically dry

through the greater Phoenix metropolitan area due to flood control/water retention structures;

however, the river occasionally flows after heavy rainfall events or controlled releases from

upstream structures (GEC-SA&B, 2005). There are surface water features onsite at PPMR; 

however, there are no perennial surface water bodies. Surface water drainage at PPMR runs from

the north portion of the facility, under East McDowell Road, to a retention basin on the southern

part of the facility via a culvert. Prior to 1987, the Water Retention Basin (84748) located on South

PPMR did not exist. Surface water from PPMR may have flowed southwest and flooded the

Motorola complex during extreme or high precipitation events. After construction of the retention

basin, however, and reconfiguration of the surface flow on the northern portion of PPMR, surface

water from north PPMR entered the retention basin and either evaporated (due to the high rates

of evapotranspiration in Arizona) or infiltrated. Surface water features near the facility are shown

in Figure 1-3.

Based on the USEPA Unregulated Contaminant Monitoring Rule 3 (UCMR3) data, it was indicated

that PFAS were detected in the City of Tempe public water system above the USEPA’s lifetime

Health Advisory within 5 miles of the facility. The UCMR3 data are located in Appendix A. PFAS
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

9

analyses performed in 2016 had method detection limits that were higher than currently

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

UCMR3 but might be detected if analyzed today.

1.5.4 Current and Future Land Use

PPMR is federally owned and operated by AZARNG and has been an active military facility and

rifle range since its congressional designation in 1930. The facility development includes

numerous structures, open storage areas, and training areas, including an abandoned runway

and active heliport. Land surrounding the facility is mostly a mix of residential, recreational, and

light industrial use. According to the City of Phoenix Zoning Database, the facility is zoned for R1-

6, single family residential; however, it is a military industrial complex that will not be used for

residential development. Reasonably anticipated future land use is not expected to change from

the current land use and will continue to be used as a military industrial complex.

1.5.5 Climate

PPMR is situated in central Arizona, and the climate is characterized as arid, with low annual

rainfall and low relative humidity. Daytime temperatures are high through the summer months.

Winters are mild, and temperatures can drop below freezing during winter months (Arizona State

Climate Office, 2019). There are two separate rainfall seasons. The first rainfall season occurs

during winter months, from November through March, when the area is subject to storms from

the Pacific Ocean. The second rainfall season occurs during July and August, when Arizona is

subject to thunderstorms whose moisture supply originates in the Gulf of Mexico, in the Pacific

Ocean, off the west coast of Mexico, and the Gulf of California. Although these periods are

classified as rainy seasons, there can be periods of a month or more in any season when zero to

less than one inch of precipitation occurs. Light snow occurs in the higher mountains surrounding

the Salt River Valley. Snowfall within the Salt River Valley, although rare, can occur (Arizona State

Climate Office, 2019). The maximum average monthly temperature in nearby Phoenix, AZ occurs

in July (106.1 degrees Fahrenheit [°F]), with an average maximum annual temperature of 86.6°F.

The minimum average monthly temperature occurs in December (44.8 °F), with an average

minimum annual temperature of 63.4°F. The average annual precipitation in Phoenix, AZ from

1981-2010 was 8.03 inches (NOAA, 2019).
CLIENT

REVISED

SCALE

ARNG

GIS BY

CHK BY

MS

MW

8/7/2019

8/7/2019

NOTES Preliminary Assessment for PFAS at Papago Park Military Res, AZ

1:633,600

8/7/2019 ­ Figure 1-1 PM RG 8/7/2019

12420 Milestone Center Drive

Germantown, MD 20876

Facility Location

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

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

Q:\Projects\ENV\GEARS\GEO\ARNG PFAS\900-CAD-GIS\920-GIS or Graphics\MXD\AZ\Papago_Park_MR_Figures\Papago_Park_MR_PA_Figures\Fig_1-1_Papago_Facility_Location.mxd

^_

0 5 10 20

Miles

Legend

Facility Boundary

Papago Park Military Reservation

10
A!

A!

A!A! A!AA!A!!

A!

A!

A!

A! A! Legend

Facility Boundary

Inferred Groundwater

Flow Direction

Geology

Holocene Surficial

Deposits

Late and Middle

Pleistocene Surficial

Deposits

Middle Miocene to

Oligocene

Sedimentary Rocks

Proterozoic Granitic

Rocks

Well

A! Monitoring Well

0 0.25 0.5 1

Miles

C:\Users\grace.canham\AECOM Directory\Stankevich, Michael - ARNG_PFAS_GIS_60552172\MXDs\AZ\Papago_Park_MR_Figures\Papago_Park_MR_PA_Figures\Fig_1-2_Papago_Geology_Groundwater.mxd

Geology and Groundwater Features

Figure 1-2 12420 Milestone Center Drive ­ Germantown, MD 20876

CLIENT

REVISED

SCALE

4/24/2020 MS

MW

4/24/2020

4/24/2020

ARNG

GIS BY

CHK BY

PROJECT Preliminary Assessment for PFAS at Papago Park Military Res, AZ

PM RG 4/24/2020

1:31,680

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

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

11
Culvert SW of 5201

Sediment Trap Culvert SE of 5201

Lower Indian

Bend Wash

Watershed

Tempe Town

Lake-Salt River

Watershed

City of

Phoenix-Salt

River Watershed

Grand Canal

Old Cross Cut Canal

Arizona Cross Cut Canal

\\ursgermantown.us.ie.urs\Germantown\Projects\ENV\GEARS\GEO\ARNG PFAS\900-CAD-GIS\920-GIS or Graphics\MXD\AZ\Papago_Park_MR_Figures\Papago_Park_MR_PA_Figures\Fig_1-3_Papago_Surface_Water.mxd

0 0.25 0.5 1

Miles

Legend

Facility Boundary

Water Body

Canal/Ditch

Surface Water Flow Direction

Surface Water Features

Figure 1-3 12420 Milestone Center Drive ­ Germantown, MD 20876

CLIENT

REVISED

SCALE

9/16/2019 MS

MW

9/16/2019

9/16/2019

ARNG

GIS BY

CHK BY

PROJECT Preliminary Assessment for PFAS at Papago Park Military Res, AZ

PM RG 9/16/2019

1:31,680

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

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

12
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

13

2. Fire Training Areas

Based on personnel interviews, PPMR historically had a firefighting unit consisting of one fire

truck and one or two people onsite for handling fire incidents until the mid-2000s. Based on

interviewee’s knowledge of facility and operations history since the 1990s, fire training was

conducted on the runway of the facility (Figure 2-1) using only water; however, information

regarding facility activities prior to the 1990s is incomplete, and AFFF may have been used

(Appendix B).
Sediment Trap

Culvert SW of 5201

Culvert SE of 5201

C:\Users\stankevichm\OneDrive - AECOM Directory\ARNG_PFAS_GIS_60552172\MXDs\AZ\Papago_Park_MR_Figures\Papago_Park_MR_PA_Figures\Fig_2-1_Papago_Fire_Training_Areas.mxd

0 400 800 1,600

Feet

Legend

Potential PFAS Release

Facility Boundary

Fire Training Area

Figure 2-1 12420 Milestone Center Drive ­ Germantown, MD 20876

CLIENT

REVISED

SCALE

9/16/2020 MS

MW

9/16/2020

9/16/2020

ARNG

GIS BY

CHK BY

PROJECT Preliminary Assessment for PFAS at Papago Park Military Res, AZ

PM RG 9/16/2020

1:9,600

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

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

Stormwater Retention Basin

14
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

15

3. Non-Fire Training Areas

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

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

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

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

identified during the PA. A description of each non-FTA is presented below, and the non-FTAs are

shown on Figure 3-1. Interview records with relevant information appear in Appendix B, and

photographs appear in Appendix C.

3.1 Building M5201

The former fire truck bay is located in the Army Aviation Support Facility (AASF) #1 (M5201). This

fire truck bay housed a single standard crash fire rescue truck and related equipment for the

airfield from the time the building was constructed in 1973, until the mid-2000s when it was

converted into a gym. According to personnel interviews, the former fire truck bay stored AFFF,

and AFFF was managed in the bay, but it is unclear what methods of storage were used or if

AFFF were transferred between containers. No floor drains were observed in the former fire truck

bay during the field visit. If no floor drains exist, the fire truck housed in the bay was likely washed

out and maintained outside of the bay. The former fire truck bay is currently used as a gym for

onsite personnel. No suspected discharge of AFFF has been recorded in historical documents,

but personnel interviews have indicated that a discharge has occurred on site. (Appendix C).

3.2 Runway (M5228) & Rotary Wing Parking Apron (M5204)

The nozzle on the fire truck was tested weekly with AFFF from the 1970s until the fire truck was

removed from the facility in the mid-2000s. Because AFFF use was not recorded, it is unclear

how often AFFF was used during nozzle testing. The testing occurred on the unpaved soil of the

Runway (M5228) and Rotary Wing Parking Apron (M5204), which originally was unpaved soil

until 1973, when the area was paved. According to the interviewee, once the foam was deployed,

it was allowed to dry on the soil. The equipment was then rinsed, and the water was directed

towards the culvert located south of the building. Water from this culvert flows underneath E

McDowell Road and discharges into the retention basin on the south side of E McDowell Road.

Additionally, TriMaxTM mobile extinguishers were used at the AASF #1 for a number of years,

though it is unknown how many units were at the AASF #1. These units, which were dispensed

and replaced through the Construction Facility Management Office (CFMO), were reported to

have been stored near the flight line during this time (Appendix B). The mobile extinguishers

were demilled before disposal, which was conducted at the adjacent vehicle maintenance area,

but it is unknown if the units were emptied at the AASF #1 or shipped full to the CFMO warehouse.

3.3 Mobile Fire Extinguishers at Fuel Point Station

The fuel point located on PPMR is used to refuel various vehicles and machinery. Mobile fire

extinguishers have historically and currently been located at this fuel point. Currently, these mobile

extinguishers were inspected and determined to be non-AFFF fire extinguishers. It is unknown if

mobile extinguishers used in the past contained AFFF.
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

16

3.4 Former Storage Area Building M5201Exterior

According to interviews, the former AFFF storage area, located just outside of Building M5201

(former fire truck bay), formerly stored bulk AFFF in a covered area on the ground. The area no

longer contains these storage containers and is now an open patch of land (Appendix C). No

suspected discharge of AFFF has been recorded in historical documents, but personnel

interviews have indicated that a release has occurred on site.
Sediment Trap

Culvert SW of 5201

Culvert SE of 5201

Building M5201 Exterior

Building M5201

Mobile Fire Extinguishers

C:\Users\stankevichm\OneDrive - AECOM Directory\ARNG_PFAS_GIS_60552172\MXDs\AZ\Papago_Park_MR_Figures\Papago_Park_MR_PA_Figures\Fig_3-1_Papago_Non-Fire_Training_Areas.mxd

0 400 800 1,600

Feet

Legend

Potential PFAS Release

Facility Boundary

Non-Fire Training Areas

Figure 3-1 12420 Milestone Center Drive ­ Germantown, MD 20876

CLIENT

REVISED

SCALE

9/16/2020 MS

MW

9/16/2020

9/16/2020

ARNG

GIS BY

CHK BY

PROJECT Preliminary Assessment for PFAS at Papago Park Military Res, AZ

PM RG 9/16/2020

1:9,600

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

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

Stormwater Retention Basin

17
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

18

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 at PPMR based on information provided in the EDRTM Report or during the PA through

available interviews. Interviewee recollections dated back to the 1990s.
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

19

5. Adjacent Sources

One off-facility PFAS source, not under the control of AZARNG, was identified adjacent to PPMR

during the PA and is discussed below. Figure 5-1 presents the location of the suspected adjacent

PFAS sources.

5.1 Motorola 52ND Street Superfund Site (Currently, ON

Semiconductor)

The Motorola 52nd Street Superfund Site property borders PPMR to the west and is downgradient

of the facility. The Motorola 52nd Street Superfund Site was in operation from 1956 until 1999,

when Motorola’s Communications, Power, and Signal Group split off to become ON

Semiconductor. Motorola remains responsible for the remediation effort at the site. The site was

not connected to a municipal sewer, therefore, on-site disposal of domestic and industrial waste

occurred in underground tanks, leaching fields, drywells, pits, sumps, and surface disposal areas.

Investigations revealed significant impact on soil and groundwater in the area by volatile organic

compounds including trichloroethylene and tetrachloroethene (Appendix A). Cleanup, operation

and maintenance activities, and monitoring are currently ongoing.

While previous investigations at this site did not evaluate PFAS, recent literature from the

Interstate Technology Regulatory Council highlights the prevalence of PFAS chemicals in

semiconductor products and production (ITRC 2017).
Sediment Trap Culvert SW of 5201

Culvert SE of 5201

Stormwater Retention Basin

Motorola 52nd St Superfund Site

\\ursgermantown.us.ie.urs\Germantown\Projects\ENV\GEARS\GEO\ARNG PFAS\900-CAD-GIS\920-GIS or Graphics\MXD\AZ\Papago_Park_MR_Figures\Papago_Park_MR_PA_Figures\Fig_5-1_Papago_Adjacent_Source.mxd

0 450 900 1,800

Feet

Legend

Potential PFAS Release

Facility Boundary

Adjacent Source

Figure 5-1 12420 Milestone Center Drive ­ Germantown, MD 20876

CLIENT

REVISED

SCALE

9/16/2019 MS

MW

9/16/2019

9/16/2019

ARNG

GIS BY

CHK BY

PROJECT Preliminary Assessment for PFAS at Papago Park Military Res, AZ

PM RG 9/16/2019

1:10,800

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

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

20
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

21

6. Preliminary Conceptual Site Model

Based on the PA, one AOI was identified at PPMR, the AASF#1 and Vicinity. The AOI location is

shown on Figure 6-1. The following section describes the CSM components and the specific

preliminary CSM developed for the AOI. The CSM includes 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.

Human exposure via the dermal contact pathway may occur, and current risk practice suggests it

is a negligible pathway compared to ingestion; however, exposure data for dermal pathways is 

sparse and continues to be the subject of PFAS toxicological study (National Ground Water

Association, 2018). Receptors for PPMR include site workers, construction workers, trespassers,

and offsite residents. The CSM indicates which specific receptors could potentially be exposed to

PFAS.

6.1 AOI 1: Army Aviation and Support Facility #1 and Vicinity

The AOI is the general location in which fire training, equipment testing, and AFFF storage

occurred. These areas, described in Sections 2 and 3, are in close enough proximity of each

other to be considered a single AOI. This area includes the runway, rotary wing parking apron,

former fire truck bay, and former storage area.

The current AASF #1 gym was the location of the former fire truck bay and AFFF storage area.

According to historical facility map photographs, the heliport and the building, which housed the

fire truck bay and AFFF storage area, were constructed sometime between 1964 and 1976. From

the 1970s until the mid-2000s, a single, standard fire truck was stationed within the bay, and

weekly nozzle testing with PFAS was conducted. Since AFFF use was not recorded on site, it is

unclear how often AFFF was used during nozzle testing. The equipment was then rinsed, and

water was directed towards the culvert located south of the building. Water form this culvert flows

underneath E McDowell Road and discharges into the retention basin on the south side of E

McDowell Road.

Due to direct interviewee knowledge of multiple releases at this facility, and the lack of information

specific to the activities that took place at the heliport area, it has been determined that AFFF was

discharged on the runway and rotary wing parking apron and have travelled through or pooled at

the culvert and the retention basin on the south side of East McDowell Road. Prior to 1987,

however, the Water Retention Basin (84748) located on South PPMR did not exist. In August of

1986, ADEMA licensed land to Motorola, Inc. for the construction, operation, and maintenance of

the retention basin. Although the agreement does not assign culpability, it appears that surface

water from PPMR may have flooded the Motorola complex during extreme or high precipitation

events. It is probable that no source of PFAS was present at PPMR until after construction of

AASF #1 in 1973. Consequently, between 1973 and 1986, a release could have traveled

southward over land entering a culvert below McDowell Road and then westward off PPMR.

However, after construction of the retention basin and reconfiguration of the surface flow on the

northern portion of PPMR, surface water from north PPMR entered the basin and either

evaporated (due to the high rates of evapotranspiration in Arizona) or infiltrated. The AOI

encompasses the building where AFFF and a fire truck were stored, the Fuel Point Station, the

Runway, and the Rotary Wing Parking Apron, where AFFF may have been deployed. Grounddisturbing activities in these areas could result in site worker, construction worker, and trespasser

exposure to suspected PFAS contamination via inhalation of dust or ingestion of surface soil. A

construction worker may also be exposed to subsurface soil. Nearby offsite residents may be
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

22

exposed to suspected PFAS contamination via inhalation of fugitive dust from ground disturbing

activities at the facility if a release occurred. PFAS are water soluble and can migrate readily from

soil to groundwater or surface water via leaching and run-off. Groundwater beneath the facility

ranges from 6 to 42 ft bgs but is not generally used for drinking water supply. From 2007-2010,

on average, groundwater supplied 3% of the City of Phoenix’s water supply (ADEQ, 2014). There

are no known groundwater wells or drinking water sources downgradient of the facility. Current

migration of PFAS from the suspected release area to surface water is unlikely based on the

direction and fate of surface water runoff on the facility. PPMR occupies the land on both the north

and south side of McDowell Road, and surface water runoff from the aviation area travels overland

and then enters a pipe that flows from the north side under East McDowell Road to a retention

basin directly on the south side of East McDowell Road. The preliminary CSM for the AOI is shown

on Figure 6-2.
Stormwater Retention Basin

Sediment Trap

Culvert SW of 5201

Culvert SE of 5201

Arizona

Cross Cut Canal

Old Cross Cut Canal

Lower Indian

Bend Wash

Watershed

City of

Phoenix-Salt

River Watershed

AOI 1

C:\Users\stankevichm\OneDrive - AECOM Directory\ARNG_PFAS_GIS_60552172\MXDs\AZ\Papago_Park_MR_Figures\Papago_Park_MR_PA_Figures\Fig_6-1_Papago_AOIs.mxd

0 0.125 0.25 0.5

Miles

Legend

Area of Interest

Potential PFAS Release

Facility Boundary

Water Body

Canal/Ditch

Surface Water Flow

Direction

Inferred Groundwater

Flow Direction

Area of Interest

Figure 6-1 12420 Milestone Center Drive ­ Germantown, MD 20876

CLIENT

REVISED

SCALE

9/16/2020 MS

MW

9/16/2020

9/16/2020

ARNG

GIS BY

CHK BY

PROJECT Preliminary Assessment for PFAS at Papago Park Military Res, AZ

PM RG 9/16/2020

1:15,840

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

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

23

Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

25

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 PPMR. The PA findings are based on the

information presented in Appendix A and Appendix B.

7.1 Findings

One AOI related to suspected PFAS release was identified at PPMR during the PA (Figure 7-1)

and is described in Table 7-1 below:

Table 7-1: Areas of Interest at Papago Park Military Reservation

Area of

Interest Name Used by Potential ReleaseDates Determination

AOI 1 AASF #1 and

Vicinity AZARNG Mid 1990s – mid2000s

Suspected PFAS

release

The AOI is the location of the AASF #1 and vicinity, where the AZARNG previously held fire

training exercises and stored AFFF materials. This area includes the Former Fire Truck Bay

(M5201), Former AFF Storage Area, Fuel Station Point, Rotary Wing Parking Apron (M5204), and

the Runway Surface (M5228). Based on the PA findings, direct interviewee knowledge of releases

at this facility, and a lack of robust institutional knowledge regarding historical activities concerning

AFFF use and storage at the facility, there is potential for exposure to PFAS contamination in

media at or near the facility. The preliminary CSM is shown on Figure 6-2, which presents the

potential receptors and media impacted.

Additionally, adjacent sources, including the Motorola 52nd Street Superfund Site (currently ON

Semiconductor), may be a suspected source of PFAS release to the environment that could have

an impact on the environmental media near PPMR, although it is in an apparent downgradient

direction from the facility.

7.2 Uncertainties

A number of information sources were evaluated 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, 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 AFFF were first used, and a reliance on personal recollection. Inaccuracies

may arise in suspected AFFF discharge locations, discharge dates, discharge volumes, and PFAS

concentration. 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.
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

26

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

of PFAS were reviewed, multiple personnel were interviewed, multiple persons were interviewed

for the same suspected source area, and suspected source areas were visually inspected.

Table 7-2 summarizes the uncertainties associated with the PA:

Table 7-2: Uncertainties within the PA

Area Evaluated Source of Uncertainty

AOI 1: AASF #1 and

Vicinity

The type, volume, frequency, and concentration of AFFF

discharged is unknown. Drainage pathways on the facility other

than the main culvert drain identified are unclear.

Facility

Inconsistent information given from interviewees and sparse

records makes it unclear if AFFF were used during training

exercises and stored in this bay. The type, volume, and

concentration of AFFF stored is unknown.

Retention Basin

Runoff flows south into a culvert which leads to the retention

basin. It is unknown if, or how frequently AFFF may have been

discharged into this retention basin.

7.3 Potential Future Actions

Interviews with AZARNG facility staff indicate that past ARNG activities might have contributed

PFAS contamination in media at or near the facility.

Records and interviewees indicate that former AZARNG activities resulted in AFFF discharges at

the AOI and areas surrounding PPMR. PFAS are suspected to be present at in the surface water

pathway. Based on the preliminary CSM developed for the AOI, there is potential for receptors to

be exposed to PFAS contamination in soil and sediment. Table 7-3 summarizes the rationale

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

process and undergo an SI.

Table 7-3 PA Findings Summary

Area of

Interest AOI Location Rationale Potential Future Action

AOI 1: AASF

#1 and Vicinity

33°28'05.6"N;

111°57'54.8"W

Significant releases during

equipment testing of an

unknown quantity of AFFF

used during fire training

exercises

Proceed to an SI focusing

on soil and groundwater,

and potentially surface

water/sediment

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

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

Sediment Trap

Culvert SW of 5201

Culvert SE of 5201

Building M5201 Exterior

Building M5201

Motorola 52nd St Superfund Site

Mobile Fire Extinguishers

AOI 1

C:\Users\stankevichm\OneDrive - AECOM Directory\ARNG_PFAS_GIS_60552172\MXDs\AZ\Papago_Park_MR_Figures\Papago_Park_MR_PA_Figures\Fig_7-1_Papago_Summary.mxd

0 450 900 1,800

Feet

Legend

Area of Interest

Potential PFAS Release

Facility Boundary

Summary of Findings

Figure 7-1 12420 Milestone Center Drive ­ Germantown, MD 20876

CLIENT

REVISED

SCALE

9/16/2020 MS

MW

9/16/2020

9/16/2020

ARNG

GIS BY

CHK BY

PROJECT Preliminary Assessment for PFAS at Papago Park Military Res, AZ

PM RG 9/16/2020

1:10,800

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

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

27
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

28

8. References

Arizona Department of Environmental Quality (ADEQ). 2018. Papago Park Military Reservation.

azdeq.gov/papago-park-military-reservation.

Arizona Department of Environmental Quality (ADEQ). 2017. Papago Park Military Reservation

– Site History. Papago Park Military Reservation.

azdeq.gov/papago-park-military-reservation-site-history.

Arizona Department of Environmental Quality (ADEQ). 2014. Site Investigation Guidance Manual

– Waste Programs Division.

http://static.azdeq.gov/vrp/site_investigation_guidance.pdf

Arizona State Climate Office. 2019. Climate of Phoenix Summary. Arizona State Climate Office:

https://azclimate.asu.edu/climate/climate-of-phoenix-summary/

Engineering and Environmental Consultants (EEC). 2005. Decision Document Administrative

Closure of 13 Sites Papago Park Military Reservation Phoenix, Arizona. National Guard

Bureau Arizona Department of Emergency and Military Affairs.

GEC-SA&B. 2005. Environmental Baseline Survey Tempe Armory. Phoenx: GEC-SA&B.

ITRC. 2017. History and Use of Per- and Polyfluoroalkyl Substances (PFAS).

https://pfas-1.itrcweb.org/wpcontent/uploads/2017/11/pfas_fact_sheet_history_and_use__11_13_17.pdf

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

Practice. January.

National Oceanic and Atmospheric Administration. 2019. Climate Data Online Database.

https://www.ncdc.noaa.gov/cdo-web/datatools/normals (Accessed June 2019).

US Environmental Protection Agency (USEPA), 1991. Guidance for Performing Preliminary

Assessments under CERCLA. EPA/540/G91/013.

TechLaw, Inc. 2004. Final Historical Records Review Papago Park Military Reservation Phoenix,

Arizona. U.S. Army Corps of Engineers, Sacramento District. General Services

Administration (GSA) Schedule Number: GS-10F-0168J. Delivery Order No. DACA05-

03-F-0024.
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

Appendix A

Data Resources
PFAS Preliminary Assessment Report

Papago Park Military Reservation, Arizona

Data resources will be provided separately on CD. Data resources for Papago Park Military

Reservation include:

Environmental Data Resources, Inc.TM Report

· 2018 EDRTM Report for Papago Park Military Reservation, Phoenix, Arizona

PPMR Markup Images

· 1977 Papago Park Military Reservation Aerial Markup Image.

· 1987 Papago Park Military Reservation Aerial Markup Image.

PPMR Site Documents

· 2004 Final Historical Records Review, Papago Park Military Reservation, Phoenix,

Arizona.

· 2005 Decision Document, Administrative Closure of 13 Sites, Papago Park Military

Reservation, Phoenix, Arizona.

· 2010 Papago Park Military Reservation Building M5201 Floor Plan, State of Arizona

Department of Emergency and Military Affairs, Construction and Facilities Management

Office.

· 2011 Papago Park Military Reservation Spill Prevention, Control, and Countermeasures

Plan Drainage Map.

· 2016 North Papago Park Military Reservation Site Plan.

· 2016 South Papago Park Military Reservation Site Plan.

· 2017 Papago Park Military Reservation Installation Atlas Excerpt.

· 2018 Papago Park Military Reservation Military Reservation Plot.

· 2018 Papago Park Military Reservation Site History.

· 2019 Facility Inventory and Stationing Plan, Papago Park Military Reservation.

· 2019 Papago Park Military Reservation Wells for Per- and Poly-fluoroalkyl Substances

Preliminary Assessment.

· 2019 City of Tempe Unregulated Contaminant Monitoring Rule 3 Data.

Previous Investigations Completed

· 1987 Engineering-Science Inc. Remedial Investigation Report for the Papago Military

Reservation Phoenix, Arizona. Arizona Department of Environmental Quality.

· 2000 IT Corporation Project 800893. Abbreviated Preliminary Assessment Papago Park

Military Reservation Phoenix, Arizona. DEMA Project AZ140M90114. DEMA PO 00-

0353-EV.

Miscellaneous Data Resources

· 2014 Site Investigation Guidance Manual, Arizona Department of Environmental Quality,

Waste Programs Division.

· 2017 History and Use of Per- and Poly-fluoroalkyl Substances.
PFAS Preliminary Assessment Report

Papago Park Military Reservation, Arizona

· 2018 Papago Park Military Reservation Per- and Poly-Fluoroalkyl Preliminary

Assessment Security.

· 2019 Phoenix Climate Data Summary of Monthly Normals, 1981-2010, U.S. Department

of Commerce, National Oceanic and Atmospheric Administration, National

Environmental Satellite, Data, and Information Service.
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

Appendix B

Preliminary Assessment Documentation
Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

Appendix B.1

Interview Records








Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

Appendix B.2

Visual Site Inspection Checklists




Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

Appendix B.3

Conceptual Site Model Information



Draft PFAS Preliminary Assessment Report

Papago Park Military Reservation Phoenix, Arizona

Appendix C

Photographic Log
Preliminary Assessment Report

Papago Park Military Reservation

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS Papago Park Military Reservation Phoenix, Arizona

Photograph No. 1

Description:

Looking East. Drainage basin 

for on base surface runoff.

Photo Date: 11/7/18 1150

Photograph No. 2

Description:

Looking North. Former fire 

truck bay.

Photo Date: 11/7/18 1015
Preliminary Assessment Report

Papago Park Military Reservation

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

APPENDIX C – Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS Papago Park Military Reservation Phoenix, Arizona

Photograph No. 3

Description:

Looking South. Former AFFF 

storage area.

Photo Date: 11/7/18 1014