FINAL

Preliminary Assessment Report

Dade City Readiness Center

Dade City, Florida

Perfluorooctanesulfonic Acid (PFOS) and Perfluorooctanoic 

Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

August 2020

Prepared for:

Army National Guard Bureau

111 S. George Mason Drive

Arlington, VA 22204
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

i

Table of Contents

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

1. Introduction ........................................................................................................................ 3

1.1 Authority and Purpose .............................................................................................. 3

1.2 Preliminary Assessment Methods ............................................................................. 3

1.3 Report Organization .................................................................................................. 3

1.4 Facility Location and Description............................................................................... 4

1.5 Facility Environmental Setting ................................................................................... 4

1.5.1 Geology ......................................................................................................... 5

1.5.2 Hydrogeology ................................................................................................. 5

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

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

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

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

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

3.1 Armory .................................................................................................................... 12

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

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

6. Preliminary Conceptual Site Model .................................................................................. 16

7. Conclusions ..................................................................................................................... 17

7.1 Findings .................................................................................................................. 17

7.2 Uncertainties ........................................................................................................... 17

7.3 Potential Future Actions .......................................................................................... 18

8. References ...................................................................................................................... 20
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

ii

Figures

Figure ES-1 Summary of Findings

Figure 1-1 Facility Location

Figure 1-2 Groundwater Features

Figure 1-3 Surface Water Features

Figure 3-1 Non-Fire Training Areas

Figure 7-1 Summary of Findings

Tables

Table 7-1: No Suspected Release Areas

Table 7-2: Uncertainties within the PA

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

Dade City Readiness Center, Florida

iii

Acronyms and Abbreviations

°F degrees Fahrenheit

AECOM AECOM Technical Services, Inc.

AFFF aqueous film forming foam

AOI area of interest

ARNG Army National Guard

CERCLA Comprehensive Environmental Response, Compensation, and Liability

Act

CFR Code of Federal Regulations

CSM conceptual site model

EDR Environmental Data Resource

FLARNG Florida Army National Guard

FTA fire training area

gpm gallons per minute

NAVD North American Vertical Datum

NOAA National Oceanic and Atmospheric Administration

PA Preliminary Assessment

PFAS per- and poly-fluoroalkyl substances

PFOA perfluorooctanoic acid

PFOS perfluorooctanesulfonic acid

RC Readiness Center

SI Site inspection

UCMR3 Unregulated Contaminant Monitoring Rule 3

US United States

USACE United States Army Corps of Engineers

USEPA United States Environmental Protection Agency

USDA United States Department of Agriculture

VSI visual site inspection
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

1

Executive Summary

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

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

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

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

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

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

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

activities or training, although other PFAS sources are possible.

AECOM completed a PA for PFAS at Dade City Readiness Center (RC) in Dade City, Florida, to

assess potential PFAS release areas and exposure pathways to receptors. Historical aerial

imagery of the current Dade City RC Boundary depicts an armory as early as 1967. The current

lease for Dade City RC, which began in 1968, is extended for a period of 99 years between Florida

ARNG (FLARNG) and the Internal Improvement Fund of the state of Florida. Based on the USEPA

Unregulated Contaminant Monitoring Rule 3 (UCMR 3) data, it was indicated that PFAS were

detected in a public water system above the USEPA Health Advisory level within 20 miles of the

facility.

The performance of this PA included the following tasks:

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

· Conducted a 1-day site visit on 7 February 2019

· Interviewed current Dade City RC personnel during the site visit including FLARNG

operations staff and Pasco County Fire Rescue Station No. 24 staff

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

documented with photographs

One area, Dade City RC Armory, has been identified as No Suspected Release (Figure ES-1).

Based on the documented absence (1955-present) of the use or release of PFAS-containing

materials at Dade City RC, no areas of interest (AOIs) were identified during the PA. Evidence

does not indicate that current or former ARNG activities contributed PFAS contamination to soil,

groundwater, surface water, or sediment at the facility or adjacent areas. Dade City RC will not

move forward in the Comprehensive Environmental Response, Compensation, and Liability Act

(CERCLA) process.
Dade City Armory

CLIENT

REVISED

SCALE

ARNG

GIS BY

CHK BY

MS

MG

1/29/2020

1/29/2020

NOTES Preliminary Assessment for PFAS at Dade City Readiness Center, FL

1:1,200

1/29/2020 ­ Figure ES-1 PM RG 1/29/2020

Q:\Projects\ENV\GEARS\GEO\ARNG PFAS\900-CAD-GIS\920-GIS or Graphics\MXD\FL\Dade_City_RC\Dade_City_RC_PA_Figures\Fig_ES-1_Dade_City_RC_Summary.mxd

12420 Milestone Center Drive

Germantown, MD 20876

Summary of Findings

0 50 100 200

Feet

Legend

No Suspected Release

Facility Boundary

Base Map: Source: Esri, DigitalGlobe,

GeoEye, Earthstar Geographics,

2
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

3

1. Introduction

1.1 Authority and Purpose

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

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

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

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

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

W912DR17F0192, issued 11 August 2017. The ARNG is assessing potential effects on human

health related to processes at their facilities that used per- and poly-fluoroalkyl substances (PFAS)

(a suite of related chemicals), primarily releases of aqueous film forming foam (AFFF) although

other sources of PFAS are possible. In addition, the ARNG is assessing businesses or operations

adjacent to the ARNG facility (not under the control of ARNG) that could potentially be responsible

for a PFAS release.

PFAS are classified as emerging environmental contaminants that are garnering increasing

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

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

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

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

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

national standards regulating PFAS in drinking water.

This report presents findings of a PA for PFAS at Dade City Readiness Center (RC) in Dade City,

Florida, in accordance with the CERCLA, as amended, the National Oil and Hazardous

Substances Pollution Contingency Plan (40 Code of Federal Regulations [CFR] Part 300), and

USACE requirements and guidance.

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

environment at Dade City RC (also referred to as “the facility”). The term PFAS will be used

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

PFOA, which are key components of AFFF.

1.2 Preliminary Assessment Methods

The performance of this PA included the following tasks:

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

· Conducted a 1-day site visit on 7 February 2019

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

(FLARNG) operations staff and Pasco County Fire Rescue Station No. 24 staff

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

documented with photographs

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 as follows:
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

4

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

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

· Section 2 – Fire Training Areas: describes the Fire Training Areas (FTAs) at the facility

identified during the site visit.

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

at the facility identified during the site visit.

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

facility, specifically in response to emergency situations.

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

facility that are not under the control of ARNG.

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

receptors at each area of interest (AOI)

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

PA.

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

· Appendix A – Data Resources

· Appendix B – Preliminary Assessment Documentation

· Appendix C – Photographic Log

1.4 Facility Location and Description

Dade City RC is located at 38017 Live Oak Avenue, Dade City, Florida in Pasco County, western

central Florida (Figure 1-1). The facility is surrounded by urban and suburban developments.

The facility contains an armory with dining, office space, and an associated vehicle storage and

light maintenance area. The facility perimeter is bordered entirely by fences. The Dade City RC

has a 99-year lease from the Internal Improvement Fund of the state of Florida that began in

1968. An armory and vehicles appear in aerials of the Dade City RC property as early as 1967.

Drinking water is supplied to the facility via public utilities.

1.5 Facility Environmental Setting

Pasco County is characterized by discontinuous highlands in the form of ridges separated by

broad valleys and is divided into five areas: the Coastal Swamps, the Gulf Coastal Lowlands, the

Brooksville Ridge, the Tsala Apopka Plain, and the Western Valley. Dade City RC is located within

the Western Valley (Austin 1982).

The Western Valley extends the length of Pasco county on its eastern side and turns west at the

termination of the Brooksville Ridge, uniting with the Gulf Coastal Lowlands at Zephyrhills Gap. It

contains the valleys of the Withlacoochee and Hillsboro Rivers and consists mainly of poorly

drained sand soils. The vegetation Is mainly longleaf pine and sawpalmetto. Most of the soils in

the Western Valley have a loamy subsoil ranging from acid to alkaline over short distances. Much

of the water falling on Pasco county is returned to the atmosphere by evaporation and

transpiration; the remainder enters the ground and ultimately flows into the Gulf of Mexico (Austin

1982).
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

5

1.5.1 Geology

Pasco County is underlain by several thousand feet of sedimentary rocks, principally limestones.

Geological formation ages for Paso and Hernando counties include Eocene, Oligocene, Miocene,

and Pleistocene Series.

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

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

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

limestone at irregular intervals. These dark brown beds of dolomitic limestone contain more

sulfate than water from overlying formations. The thickness of the Avon Park Limestone in the

Pasco County area ranges from 50 to about 500 feet. The portion of the dolomitic zone about 100

feet below the top of the Avon Park Limestone is highly permeable and yields large quantities of

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

hard, dolomitic limestone, overlies the Avon Park Limestone, and attains a thickness of 40 to 60

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

Wells that produce more than 1,000 gallons per minute (gpm) generally penetrate the Inglis

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

Crystal River Formation. The Crystal River and Williston Formations exhibit similar lithology and

hydrology. Lithologically, the formations are generally white to tan, soft chalky, coquinoid

limestones. The formations attain a thickness of 100 to 150 feet and are not an important source

of water in the area.

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

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

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

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

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

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

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

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

The Tampa Limestone is not a major source of water in Pasco county (Wetterhall 1964). The

Hawthorn Group is thin and discontinuous in the south, and generally absent toward the north,

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

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

the Suwannee Limestone of Oligocene age, and Ocala Limestone and Avon Park Formation of

Eocene age (Trommer 2009).

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

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

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

water generally contains concentrations of iron and are likely to be highly colored (Wetterhall

1964).

1.5.2 Hydrogeology

The Principal hydrogeologic units within the watershed are the surficial aquifer, the intermediate

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

(Trommer 2009). The discussion below focuses on the uppermost aquifer as it is the most likely

to be affected by PFAS releases.

The surficial aquifer system consists of Miocene to Holocene, siliciclastic deposits that are

contiguous with the land surface. The clastics are usually quartz sand, silty sand, and kaolinitic to
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

6

smectitic clay. The surficial aquifer is most likely to occur as a distinct hydrostratigraphic unit along

the Brooksville Ridge, or other upland areas, where low permeability clays of the Hawthorn Group,

or its residuum, separate the surficial aquifer from the underlying Upper Floridan aquifer. The

downward movement of water into the Upper Floridan aquifer is retarded by these lower

permeability units; however, the collapse of surficial sediments into voids in the underlying

limestone has produced numerous breaches in the clays that act as vertical conduits for the

movement of water from the surficial to the Upper Floridan aquifer (DeWitt 2011).

Generally, high recharge rates occur where limestone is near the land surface, or where overlying

sediments lack low-permeability materials. The occurrences of sinkholes and associated internal

drainage of surface waters also result in higher recharge to the Floridan aquifer. Lower recharge

rates occur where confining materials overlying the aquifer retard downward vertical movement

of water, or where an upward water-level gradient exists between the Floridan and surficial

aquifers (DeWitt 2011). The depth to water table at Dade City RC is approximately 3.5 to 6 feet

(United States Department of Agriculture [USDA] 2019). Locally at Dade City RC, the groundwater

flow direction is predominantly to the northeast (Figure 1-2). There are several public supply wells

southeast and upgradient of the facility within a half mile radius. Based on the USEPA UCMR3

data, it was indicated that PFAS were detected in a public water system above the HA within 20

miles of the facility (Appendix A).

1.5.3 Hydrology

Dade City RC is within the Dobes Hole Lake Watershed, which is a subwatershed of the Duck

Lake Watershed (Figure 1-3). Pasco County is located on the west coast of Central Florida, north

of Tampa Bay. Withlacoochee River is the primary stream that flows through Pasco County,

nearest Dade City RC.

Duck Lake Watershed is a predominantly deranged terrain, but there are some incidences of

channelized connectivity. The area is typically represented by rolling hills surrounding relatively

flat plains. Slopes can be significant along the ridges but are generally mild in the lower areas.

The topography consistently slopes from the west towards the Withlacoochee River, located east

of the watershed. Elevations range from approximately 57 feet (North American Vertical Datum

[NAVD] 88) in the east to approximately 270 feet (NAVD 88) in the west. A low ridge defines the

eastern boundary of Duck Lake Watershed and represents a break between the watershed and

the Green Swamp/Withlacoochee River. Within the watershed, Dade City reflects significant

developed areas drained by stormwater collection systems.

Hydrologically, the western areas in the watershed are typically internally drained through sandy,

permeable soils or into depressional storage areas. Runoff flows toward the east by overtopping

depressions or culvert connections. Numerous depressions are landlocked and either do not

discharge or do so only under high stage conditions. Along the eastern portion of the watershed

(east of Old Lakeland Highway and US 301), the hills give way to flatter, lower-lying topography

that is dominated by wetlands. The western portion of the watershed discharges to these wetlands

via numerous cross drains located beneath Old Lakeland Highway and US 301. Much of the

wetlands systems have been modified for agricultural purposes. Duck Lake, located along the

central-eastern boundary of the watershed, connects to these wetlands (Inwood Consulting

Engineers 2015).

The wetland system generally flows from south to north via overland flow and culvert connections.

Near Dade City, flow is consolidated into an excavated canal (Dade City Canal), which continues

north until it exits the northeastern part of the watershed. Upon exiting the watershed, the canal

continues northeast toward the Withlacoochee River. The Dade City Canal represents the primary

discharge outlet for Duck Lake Watershed.
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

7

Under higher stages, Duck Lake provides an additional point of discharge via a culvert under

Duck Lake Canal Road. Duck Lake discharges to the east via the culvert and a short length of

canal that ultimately drains to the Withlacoochee River (Inwood Consulting Engineers 2015).

1.5.4 Climate

The climate at Dade City RC is subtropical, with warm humid summers and mild dry winters

(Trommer 2009). In January, the average temperature is 70.1 degrees Fahrenheit (°F). June, July,

and August have the highest average temperatures, at 90°F. The greatest mean monthly

precipitation occurs in July and August. The average annual precipitation is 52.56 inches (National

Oceanic and Atmospheric Administration [NOAA] 2019).

Rainfall varies seasonally between June and September from intense localized thunderstorms as

well as occasional tropical storms. Winter frontal storms account for most of the rainfall from

December through March (Trommer 2009).

1.5.5 Current and Future Land Use

Dade City RC currently contains an armory with dining, office space, and outdoor vehicle storage

area for the ARNG. The armory complex includes parking areas. Access to the facility is

controlled. Land use is not expected to change. Dade City is highly urbanized and consists of

agricultural, wetland, and lower density urban land use types.
CLIENT

REVISED

SCALE

ARNG

GIS BY

CHK BY

MS

MG

4/1/2019

4/1/2019

NOTES Preliminary Assessment for PFAS at Dade City Readiness Center, FL

1:63,360

4/1/2019 ­ Figure 1-1 PM RG 4/1/2019

Q:\Projects\ENV\GEARS\GEO\ARNG PFAS\900-CAD-GIS\920-GIS or Graphics\MXD\FL\Dade_City_RC\Dade_City_RC_PA_Figures\Fig_1-1_Dade_City_RC_Facility_Location.mxd

12420 Milestone Center Drive

Germantown, MD 20876

Facility Location

^_

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

Intermap, increment P Corp., NRCAN, Esri Japan, METI,

0 0.5 1 2

Miles

Legend

Facility Boundary

Dade City Readiness Center

8
!C(!C(

!C(

!C(

!C(!C(

!C(

!C(

!C(

!C(

!C(

!C(

!C(

Dade City Canal

CLIENT

REVISED

SCALE

ARNG

GIS BY

CHK BY

MS

MG

5/30/2019

5/30/2019

NOTES Preliminary Assessment for PFAS at Dade City Readiness Center, FL

1:31,680

5/30/2019 ­ Figure 1-2 PM RG 5/30/2019

Q:\Projects\ENV\GEARS\GEO\ARNG PFAS\900-CAD-GIS\920-GIS or Graphics\MXD\FL\Dade_City_RC\Dade_City_RC_PA_Figures\Fig_1-2_Dade_City_RC_Groundwater.mxd

12420 Milestone Center Drive

Germantown, MD 20876

Groundwater Features

0 0.25 0.5 1

Miles

Legend

Facility Boundary

Water Body

Wetland

River/Stream

Canal/Ditch

Inferred Groundwater

Flow Direction

Geology

Hawthorn Group

Wells

!C( Public Water Supply

Base Map: Source: Esri, DigitalGlobe,

GeoEye, Earthstar Geographics,

9
TANK LAKE

Watershed

DOBES

HOLE LAKE

Watershed

Dade City Canal

CLIENT

REVISED

SCALE

ARNG

GIS BY

CHK BY

MS

MG

6/10/2019

6/10/2019

NOTES Preliminary Assessment for PFAS at Dade City Readiness Center, FL

1:18,000

6/10/2019 ­ Figure 1-3 PM RG 6/10/2019

Q:\Projects\ENV\GEARS\GEO\ARNG PFAS\900-CAD-GIS\920-GIS or Graphics\MXD\FL\Dade_City_RC\Dade_City_RC_PA_Figures\Fig_1-3_Dade_City_RC_Surface_Water.mxd

12420 Milestone Center Drive

Germantown, MD 20876

Surface Water Features

0 750 1,500 3,000

Feet

Legend

Facility Boundary

Water Body

Wetland

River/Stream

Canal/Ditch

Surface Water Flow

Direction

Base Map: Source: Esri, DigitalGlobe,

GeoEye, Earthstar Geographics,

10
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

11

2. Fire Training Areas

Through Environmental Data Resource (EDR) Reports and interviews with Dade City RC

personnel who had knowledge dating back to 2008, no FTAs were identified within the Dade

City RC facility during the PA. Aerial photos covering 1952 to present show no sign of an FTA

and development of the property has remained relatively unchanged from 1967 to present.

Interview records appear in Appendix B.
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

12

3. Non-Fire Training Areas

One non-FTA where PFAS were potentially released was inspected during the PA. A description

of the non-FTA is presented below, and the non-FTA is shown on Figure 3-1. Interview records

appear in Appendix B. Photographs appear in Appendix C.

3.1 Armory

The Armory is located in the center of the facility property (Figure 3-1). The geographic

coordinates are 28°21'56.59"N; 82°11'13.82"W. The armory is used for drills and is not outfitted

with a fire suppression system. During the site visit, ABC Dry chemical extinguishers were found

throughout the facility. The kitchen portion of the armory is outfitted with a fire suppression system.

At the time of the visit and to interviewee knowledge dating back to 2008, the fire suppression

system contained potassium carbonate solution. A potential PFAS release to the environment at

the armory is not suspected.
Dade City Armory

CLIENT

REVISED

SCALE

ARNG

GIS BY

CHK BY

MS

MG

1/29/2020

1/29/2020

NOTES Preliminary Assessment for PFAS at Dade City Readiness Center, FL

1:1,200

1/29/2020 ­ Figure 3-1 PM RG 1/29/2020

Q:\Projects\ENV\GEARS\GEO\ARNG PFAS\900-CAD-GIS\920-GIS or Graphics\MXD\FL\Dade_City_RC\Dade_City_RC_PA_Figures\Fig_3-1_Dade_City_RC_Non-Fire_Training_Areas.mxd

12420 Milestone Center Drive

Germantown, MD 20876

Non-Fire Training Area

0 50 100 200

Feet

Legend

No Suspected Release

Facility Boundary

Base Map: Source: Esri, DigitalGlobe,

GeoEye, Earthstar Geographics,

13
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

14

4. Emergency Response Areas

Based on interviews with FLARNG personnel, whose knowledge covers 2008 to present, and

review of EDR Reports, no emergency response areas were identified within the Dade City RC

facility during the PA. All emergency services for the current Dade City RC are provided by the

Pasco County Fire Department. Information regarding emergency responses prior to interviewee

knowledge is unknown. Interview records appear in Appendix B.
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

15

5. Adjacent Sources

One off-facility PFAS source adjacent to Dade City RC was identified during interviews. Pasco

County Fire Department interviewees indicated they responded to a fire near the Dade City RC.

No further information on the event was available. It is unknown whether the Pasco County Fire

Department responded to the fire with AFFF. The firetrucks contain foam solutions on trucks in 5-

gallon containers. The trucks are cleaned on site.
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

16

6. Preliminary Conceptual Site Model

Based on the PA findings, no PFAS release areas were identified, therefore there are no AOIs at

Dade City RC. A conceptual site model (CSM) identifies three components necessary for

potentially complete exposure pathways related to a site: (1) source, (2) pathway, and (3) receptor.

If any of these elements are missing, the pathway is considered incomplete. Based on the findings

of this PA, there are no PFAS sources that originate at Dade City RC or from activities associated

with Dade City RC.
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

17

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 Dade City RC. The PA findings are based

on the information presented in Appendix A and Appendix B.

7.1 Findings

No PFAS releases relating to current or historical activities at Dade City RC were identified during

this PA. The following areas discussed in Section 3 (Figure 7-1), and presented in Table 7-1

below, were determined to have no suspected release:

Table 7-1: No Suspected Release Areas

No Suspected Release

Area Used by

Rationale for No Suspected

Release Determination

Armory FLARNG

Interviewees indicated the fire

extinguishers located around the

facility have been ABC dry

chemical. Fire suppression

system installed in the facility

kitchen contains potassium

carbonate.

7.2 Uncertainties

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

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

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

records on the disposition of PFAS or the use of PFAS in training, firefighting, or other nontraditional activities were not typically kept by the facility or available during the PA.

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

with personnel who had direct knowledge of the facility. 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 were first used (1969 to present), and a reliance on personal

recollection. There is also a possibility the PA missed a source of PFAS, as the science of how

PFAS may enter the environment continually evolves.

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

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

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

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

Table 7-2: Uncertainties within the PA

Area Evaluated Source of Uncertainty

Dade City RC

No or limited information was available on the use and/or storage

of AFFF at the facility. Interviewees did not have knowledge prior

to 2008; however, FLARNG confirmed no AFFF-containing

materials were used at the facility since its construction
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

18

7.3 Potential Future Actions

Based on the documented absence (1955-present) of the use or release of PFAS-containing

materials at Dade City RC, no AOIs were identified during the PA. Evidence does not indicate that

current or former ARNG activities contributed PFAS contamination to soil, groundwater, surface

water, or sediment at the facility or adjacent areas. Dade City RC will not move forward in the

CERCLA process.
Dade City Armory

CLIENT

REVISED

SCALE

ARNG

GIS BY

CHK BY

MS

MG

1/29/2020

1/29/2020

NOTES Preliminary Assessment for PFAS at Dade City Readiness Center, FL

1:1,200

1/29/2020 ­ Figure 7-1 PM RG 1/29/2020

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

12420 Milestone Center Drive

Germantown, MD 20876

Summary of Findings

0 50 100 200

Feet

Legend

No Suspected Release

Facility Boundary

Base Map: Source: Esri, DigitalGlobe,

GeoEye, Earthstar Geographics,

19
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

20

8. References

Austin, William E., 1982, Soil Survey of Pasco County, Florida. June 1982.

DeWitt, D.J., 2011. The Hydrology and Water Quality of Select Springs in the Southwest Florida

Water Management District. March.

Inwood Consulting Engineers, 2015. Watershed Evaluation Report: Duck Lake Watershed (L733).

March.

National Oceanic and Atmospheric Administration (NOAA). 2019. National Weather Service

Tampa Bay Original Climate Page. Retrieved May 30, 2019, from NOAA:

https://www.weather.gov/tbw/tampabayoriginalclimatepage.

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

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

Scientific Investigations Report 2009–5124, 47 p.

United States Department of Agriculture (USDA). 2019. Custom Soil Resource Report for Pasco

County, Florida: Natural Resources Conservation Service.

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

Preliminary Assessments under CERCLA. September.

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

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

Dade City Readiness Center, Florida

Appendix A

Data Resources
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

Data resources will be provided separately on CD. Data resources for Dade City Readiness

Center include:

Dade City Leases, Licenses, and Permits

· 1989 Armory Board, State of Florida Lease No. 2345 located at Dade City Armory, Florida

Environmental Data Resources, IncTM. Geocheck Report

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

Center, Florida

Miscellaneous Data Resources

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

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

· 1982 Soil Survey of Pasco County, Florida

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

· 2011 The Hydrology and Water Quality of Select Springs in the Southwest Florida Water

Management District

· 2015 Watershed Evaluation Report: Duck Lake Watershed

· 2019 Soil Resource Report for Pasco County, Florida: Natural Resources Conservation

Service

· Dade City USEPA Unregulated Contaminant Monitoring Rule 3 Data
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

Appendix B

Preliminary Assessment Documentation
PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

Appendix B.1

Interview Records


PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

Appendix B.2

Visual Site Inspection Checklists

PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

Appendix B.3

Conceptual Site Model Information



PFAS Preliminary Assessment Report

Dade City Readiness Center, Florida

Appendix C

Photographic Log
Appendix C - Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS

Dade City Readiness Center Dade City, Florida

Preliminary Assessment Report

Dade City Readiness Center

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites 

ARNG Installations, Nationwide

Photograph No. 1

Description:

Facility Kitchen fire 

suppression system chemical, 

potassium carbonate solution.

Orientation:

South

Date 2/7/2019

Time 10:21

Photograph No. 2

Description:

Facility Kitchen Fire 

suppression, Potassium 

carbonate.

Orientation:

South

Date 2/7/2019

Time 10:22

AECOM Page 1 of 2
Appendix C - Photographic Log

Army National Guard, Preliminary 

Assessment for PFAS

Dade City Readiness Center Dade City, Florida

Preliminary Assessment Report

Dade City Readiness Center

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites 

ARNG Installations, Nationwide

Photograph No. 3

Description:

Facility Kitchen Fire 

Suppression System.

Orientation:

Southwest

Date 2/7/2019

Time 10:22

AECOM Page 2 of 2