FINAL

Preliminary Assessment Report

Camp McCain

Grenada, Mississippi 

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
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

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Table of Contents

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

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

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

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

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

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

1.5 Facility Environmental Setting ................................................................................... 6

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

1.5.2 Hydrogeology ................................................................................................. 7

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

1.5.4 Climate ........................................................................................................... 8

1.5.5 Current and Future Land Use ......................................................................... 9

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

3. Non-Fire Training Areas ................................................................................................... 14

3.1 Release Areas A and B – Wastewater Treatment Plant (WWTP) AFFF Disposal

and Forced Discharge Area .................................................................................... 14

3.2 No Suspected Release Area A – Fire Station .......................................................... 14

3.3 No Suspected Release Area B – Aviation Operations ............................................. 15

3.4 No Suspected Release Area C – Dining Facilities (DFACs) .................................... 15

3.5 No Suspected Release Area D – Fuel Point ............................................................ 15

3.6 No Suspected Release Area E – Paint Booth.......................................................... 15

4. Emergency Response Areas ............................................................................................ 17

5. Adjacent Sources ............................................................................................................. 18

5.1 Rockwell International Wheel and Trim – Superfund Site ........................................ 18

6. Preliminary Conceptual Site Model .................................................................................. 20

6.1 AOI 1: Release Areas A and B ................................................................................ 20

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

7.1 Findings .................................................................................................................. 23

7.2 Uncertainties ........................................................................................................... 24

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

8. References ...................................................................................................................... 27
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

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Tables

Table ES-1 AOIs at Camp McCain

Table 7-1 AOIs at Camp McCain

Table 7-2 Areas of No Suspected Release

Table 7-3 Uncertainties

Table 7-4 PA Findings Summary

Figures

Figure ES-1 Summary of Findings

Figure ES-2 Conceptual Site Model for Camp McCain

Figure 1-1 

Figure 1-2 

Figure 1-3 

Figure 3-1 

Figure 5-1 

Figure 6-1 

Figure 6-2 

Figure 7-1 

Facility Location

Groundwater Features

Surface Water Features

Non-Fire Training Areas

Adjacent Sources

Areas of Interest

Preliminary Conceptual Site Model AOI 1, Release Areas A and B

Summary of Findings

Appendices

Appendix A Data Resources

Appendix B Preliminary Assessment Documentation

B.1 Interview Records

B.2 Visual Site Inspection Checklists

B.3 Conceptual Site Model Information

Appendix C Photographic Log
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

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Acronyms and Abbreviations

°F degrees Fahrenheit

% percent

AECOM AECOM Technical Services, Inc.

AFFF aqueous film forming foam

AOI area of interest

ARNG Army National Guard

bgs below ground surface

CERCLA Comprehensive Environmental Response, Compensation, and Liability

Act

CFR Code of Federal Regulations

CSM conceptual site model

DFAC dining facility

ft feet/foot

FTA fire training area

MDEQ Mississippi Department of Environmental Quality

MIST Minimum Impact Suppression Techniques

MS Mississippi

MSARNG Mississippi Army National Guard

NOAA National Oceanic Atmospheric Administration

PA Preliminary Assessment

PFAS per- and poly-fluoroalkyl substances

PFOA perfluorooctanoic acid

PFOS perfluorooctanesulfonic acid

PFTeA perfluorotetradecanoic acid

SI Site Inspection

US United States

USACE United States Army Corps of Engineers

USEPA United States Environmental Protection Agency

USGS United States Geological Survey

VSI visual site inspection

WWTP wastewater treatment plant
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

1

Executive Summary

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

Army National Guard (ARNG) G9 Division, 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), primarily in the form

of aqueous film forming foam released as part of firefighting activities, although other PFAS

sources are possible.

AECOM completed a PA for PFAS at Camp McCain in Grenada, Mississippi, to assess potential

PFAS release areas and exposure pathways to receptors. Camp McCain includes approximately

13,027 acres licensed to the State of Mississippi for year-round use in support of the National

Guard. The performance of this PA included the following tasks:

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

· Conducted a site visit on 6 March 2019

· Interviewed current Camp McCain personnel and operations staff during the site visit

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

documented with photographs

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

pathway of PFAS for the area(s) of interest (AOIs) and the facility (Figure ES-1)

One AOI related to a potential PFAS release was identified at Camp McCain during the PA. The

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

Table ES-1 AOIs at Camp McCain

Area of Interest Name Used by Potential Release Date

AOI 1 Release Areas A and B MSARNG Early 2009-2011

Based on a potential PFAS release at this AOI, there is potential for exposure to PFAS to

receptors. Potential receptors in the area include on-facility site workers, construction workers,

and trespassers, and downgradient off-facility residents and recreators. All receptors may be

exposed to PFAS contamination in surface water and sediments/biosolids via ingestion; site and 

construction workers may be exposed to surface soil via ingestion and inhalation of soil

particulates; construction workers may also be incidentally exposed to potential PFAS in

subsurface soil. Off-facility residents and on-facility site and construction workers may potentially

be exposed to PFAS in groundwater via ingestion.

Adjacent sources of PFAS surrounding Camp McCain were not identified during the PA; however,

Rockwell International Wheel and Trim, a former chrome plating facility and superfund site, is

located approximately 8-miles downgradient of Camp McCain. The preliminary CSM for Camp

McCain is shown on Figure ES-2.
­ Figure ES-1

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Summary of Findings

12420 Milestone Center Drive

Germantown, MD 20876

Cantonment

Release Area B

Release Area A

No Suspected

Release Area B

No Suspected

Release Area C

No Suspected

Release Area A

No Suspected

Release Area E

No Suspected

Release Area D

Little Bogue

Epison Branch

Big Bogue

Crowder Creek

AOI 1

Legend

Area of Interest

Potential PFAS Release

No Suspected Release

Facility Boundary

Water Body

River/Stream

0 600 1,200 2,400

Feet

1

Rockwell Grenada NPL Site

1

2
Media

SOURCE PATHWAY

AFFF 

disposed of in 

WWTP lagoon

PFAS in 

Surface Soil

Human 

Activities

Precipitation/ 

Run-Off

Leaching/ 

Infiltration

Airborne Soil 

particulate

Surface Soil 

at AOI

Surface 

Water/ 

sediment

Subsurface 

Soil

Shallow 

Groundwater

Source Release Mechanism Media Transport and Migration Media Exposure Routes

Inhalation of 

Dust

IngestionIngestion

Ingestion

Ingestion

Flow-Chart ContinuesPartial / Possible FlowIncomplete PathwayPotentially Complete PathwayComplete Pathway

LEGEND

Figure E

Preliminary Concep

Camp Mc

Potential 

Off-Facility 

Source Not 

under 

Control of 

ARNG

AOI 1

PFAS in 

Surface 

Water

REHum

C

Site 

Worker

Cons

W

Site 

Worker

Cons

W

/ 

/ 

/ 

/

Notes:1. The resident and recreator receptors refer to an off-site receptor.2. Dermal contact exposure pathway is incomplete for PFAS.

/ 
PFAS Preliminary Assessment Report

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1. Introduction

Authority and Purpose

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

Army National Guard (ARNG) G9 Division, 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-09-D-0003 / 0008, 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), 

primarily in the form of aqueous film forming foam (AFFF) released as part of firefighting activities, 

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

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

responsible for a PFAS release. 

PFAS are classified as emerging environmental contaminants that are garnering increasing 

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

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

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

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

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

standards regulating PFAS in drinking water.

This report presents the findings of a PA for PFAS at Camp McCain (also referred to as the 

“facility”), in Grenada, Mississippi, 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 USACE requirements and guidance. 

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

environment at Camp McCain. The term PFAS will be used throughout this report to encompass 

all PFAS chemicals being evaluated, including PFOS and PFOA, which are key components of 

AFFF.

Preliminary Assessment Methods

The performance of this PA included the following tasks: 

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

· Conducted a site visit on 6 March 2019

· Interviewed current Camp McCain personnel and operations staff during the site visit

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

documented with photographs 

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

pathway of PFAS for the area of interest (AOI) and the facility
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

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Report Organization

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

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

each are:

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

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

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

identified during the site visit 

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

at the facility identified during the site visit 

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

facility, specifically in response to emergency situations 

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

facility that are not under the control of ARNG 

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

and receptors for the AOIs and the facility 

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

PA 

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

· Appendix A – Data Resources

· Appendix B – Preliminary Assessment Documentation

· Appendix C – Photographic Log

Facility Location and Description

Camp McCain is located in Grenada, Mississippi and is approximately 13 miles north of the city 

of Winona (Figure 1-1). The facility is primarily in Grenada County; however, a small portion is 

located south of the county line, in Montgomery County. Approximately 8 miles to the northwest 

of the facility is the county seat of Grenada, while Interstate 55 is approximately 6 miles directly 

west of the facility. 

In the early 1940s, the War Department acquired 42,073 acres for the Army to establish a 

Triangular Division Camp. Once the camp was established, the name was changed from the 

provisional Grenada Triangular Division Camp to Camp McCain in honor of Major General Henry 

P. McCain from neighboring Carroll County, Mississippi. In December 1944, Camp McCain was 

designated an inactive facility. On 25 January 1946, the Army reported the 42,073 acres in fee 

surplus to the War Assets Administration. On 3 December 1946, 3005.69 acres were withdrawn 

from surplus and licensed to the State of Mississippi for year-round use in support of the National 

Guard. In 1969, tracked vehicle training was added to Camp McCain, and in 1971, a maintenance 

facility was built. Many changes followed, including the organization of the 221st Engineer 

Detachment. On 12 August 1986, an additional 4,600 adjoining acres were added to the Camp 

McCain property, increasing the tactical training area. In 1987 and 1988, eight modern small arms 

ranges were constructed. All of the newly acquired land falls within the original borders of the 

facility, dating back to the 1940s. Through this expansion, Camp McCain has grown to its current 

size of approximately 13,027 acres. 
PFAS Preliminary Assessment Report

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Facility Environmental Setting

Camp McCain is located in the North-Central Hill Section of the Coastal Plain physiographic 

province. Long-term erosion and a well-developed drainage system are the two main factors in 

producing the slightly rolling surface landscape on the facility (Brown and Adams, 1943). 

Topography tends to slope to the southwest, toward the Batupan Bogue Valley. Five stream 

valleys cut across Camp McCain in the northeast-southwest direction, and these connect to the 

larger Batupan Bogue Valley along the southern boundaries. Elevations at the ground surface 

range from 460 feet (ft) above mean sea level in the center of the Camp to 200 ft above mean 

sea level along the southwestern portions of the Little Bogue Valley (United States Geological 

Survey [USGS], 1983). 

1.5.1 Geology

Camp McCain lies within the Mississippi embayment, a regional geologic feature whose 

sedimentary strata range in age from Jurassic to Quaternary and encompass a large area within 

the Gulf Coastal Plain physiographic region, stretching from southern Illinois in the north to 

Alabama and Texas in the east and west. Structurally, the embayment is a syncline in which the 

axis generally parallels the Mississipapi River, plunging to the south. The embayment thickens 

down plunge, with the deepest Jurassic strata lying approximately 18,000 feet below ground 

surface (bgs) in the southern part of the region. These Jurassic strata generally bear non-potable 

water. Parts of the embayment have been subjected to regional metamorphism (Cushing et al., 

1964), and the dip is to the south-southwest, controlled by the attitude of the underlying basement 

rock (MSARNG, 2003). 

Locally, the facility lies within the north-central Mississippi section of the embayment, where 

outcrops generally date to the Eocene Epoch. Underlying these are the Paleocene strata of the 

Midway Group, and Upper Cretaceous strata. The thickness of the Tertiary deposits (Eocene and 

Paleocene) reach a maximum thickness of 7,000 feet in the southern part of the region, with the 

Paleocene strata accounting for the lower 1,000 feet. Therefore, the Eocene strata account for 

much of the underlying bedrock and water-bearing formations in this section of Mississippi. 

The Eocene strata present within the area are the Wilcox Formation and the Claiborne Group. 

The Jackson Formation has been eroded in this area, leaving exposures of the Claiborne Group 

at surface level. These outcrops in the Camp McCain area consist, in stratigraphic order, of the 

Kosciusko Formation; the Zilpha Shale; the Winona Sand; and the Neshoba Sand member of the 

Tallahatta Formation. The Wilcox Formation underlies these strata. 

A small outcrop of the basal section of the Kosciusko Formation is present approximately 3 miles 

southwest of the facility. This section of the Formation consists of coarse to medium-grained 

quartz sand, with percentages of glauconite increasing towards its gradational contact with the 

underlying Zilpha Shale. The Zilpha Shale is composed of dark gray marine clay and acts as an 

aquitard to the underlying, highly glauconitic and fossiliferous Winona Sand, which is used locally 

as an aquifer in north-central Mississippi. The maximum thickness of the Zilpha and Winona 

Formations reaches roughly 100 feet in areas southwest of Camp McCain. 

The Tallahatta Formation consists of several sandy members, namely the Neshoba Sand, used 

locally as aquifers. The Neshoba Sand is typically a fine, micaceous quartz sand with a thickness 

of about 50 ft. Underlying the Neshoba Sand is the Basic City Shale, a clay formation reaching 

up to 150 ft thick below Camp McCain (MSARNG, 2003). It is composed of light-colored, sparsely 

fossiliferous clay- and siltstone. The basal member of the Tallahatta Formation (and Claiborne 

Group) is the Meridian Sand, a characteristically crossbedded, fine to very coarse quartz sand 

formation, averaging 100, but reaching up to 500, ft thick. The Meridian Sand’s contact with the 
PFAS Preliminary Assessment Report

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7

underlying Wilcox Formation is determined by the presence of lignitic clay or other carbonaceous

material characteristic of the Wilcox (Cushing et al., 1964).

The Wilcox Formation is undifferentiated in this section of Mississippi but does consist of two

identifiable units: an upper shale and a lower sand unit. The shale unit is the differentiating marker

between the Meridian-Upper Wilcox and the Middle Wilcox aquifers. These aquifers are the

principle aquifers in the region.

The unconsolidated deposits throughout the Camp McCain area consist of channel and floodplain

deposits in the eroded stream valleys and terrace and weathered loess deposits in the uplands.

The channel and floodplain deposits are classified as loose sand, clay, and vegetal debris up to

20 ft thick. The terrace and loess deposits are described as loose sand, clay, and loam up to 15

ft thick (Brown and Adams, 1943).

There is a north-northeast-trending thrust fault between Highway 51 and the western boundary of

Camp McCain. Approximately 80 ft of displacement are shown on stratigraphic cross-sections

and geologic logs presented by Brown and Adams. Camp McCain is located on the down-thrust

side of the fault (Brown and Adams, 1943).

The geology of the Camp McCain area is illustrated in Figure 1-2.

1.5.2 Hydrogeology

The Mississippi embayment aquifer system is the system of water-bearing units that underlie the

Mississippi embayment, comprising a hydraulically connected system of various sand and clay

units that encompass an area of more than 160,000 square miles. This system serves Mississippi

as well as areas of Texas, Alabama, Arkansas, Illinois, Tennessee, and Louisiana. The most

widely used aquifers in the embayment are those of the Wilcox Group, namely the Meridian-Upper

Wilcox and Middle Wilcox aquifers (Darden, 1986a).

Depth to groundwater varies throughout the region, but within the boundaries of Camp McCain

historically ranges from below 1 ft. bgs. to greater than 50 ft. bgs. (Brown and Adams, 1943).

These measurements were taken from wells completed in the Meridian-Upper Wilcox and Middle

Wilcox aquifers. Groundwater levels in the southeast section of Camp McCain ranged from 2 to

9 ft bgs in the wells completed in the shallow floodplain deposits (USGS, 2004).

The regional groundwater gradient in the Meridian-Upper Wilcox aquifer is to the southwest

(Darden, 1986a). Groundwater data reported by Brown and Adams (1943) and in the USGS

lysimeter study (2004) suggest shallow groundwater underlying Camp McCain is controlled

predominately by the local topography, resulting in localized variations in the shallow groundwater

gradient.

A watershed divide that also indicates a shallow groundwater divide exists in the northeast corner

of Camp McCain. North of this divide, the shallow groundwater is expected to flow to the north,

toward Redgrass Creek. Groundwater flow directions (USACE, 2009) are shown in Figure 1-2.

Surface infiltration is the primary manner of recharge to the groundwater aquifer system in the

Camp McCain area. Recharge to the Meridian-Upper Wilcox aquifer occurs on the ground within

Camp McCain. Recharge to the Middle and Lower Wilcox aquifers occurs east of Camp McCain

(Darden, 1986a, 1986b). Groundwater flows from high elevations and discharges to numerous

wetlands and surface water bodies at and near Camp McCain, including Crowder Creek, Epison

Branch, Campbell Creek, Little Bogue, and Batupan Bogue.

Domestic and public water supply wells located downgradient of Camp McCain (i.e., northeast,

west, and southwest of the facility) are primarily completed in the Meridian-Upper Wilcox, Middle

Wilcox, and Lower Wilcox aquifers (USGS, 1992).
PFAS Preliminary Assessment Report

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8

According to facility personnel, three wells are located at Camp McCain. Well #1 is located

adjacent to and services the tank wash located northeast of the cantonment area. This 525-foot

deep well draws water from the Middle Wilcox aquifer; water from Well #1 is solely used for the 

tank wash facility, not potable water. Well #2 was installed in 2015, according to the Mississippi

Department of Environmental Quality (MDEQ) permit application (Appendix A), to a depth of 390

ft., within the Middle Wilcox aquifer, for potable water use. It is located just south of the tank

washing facility. Lastly, Well #3 is a potable well located near the fuel point. The majority of Camp

McCain now obtains its potable water entirely from on-site groundwater wells; interviewees noted

that a small southeast portion of the camp is served by Hays Creek public water system.

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

PFAS were detected in a public water system above the USEPA Health Advisory level within 20

miles of the facility. In 2017, National Guard Bureau conducted PFAS drinking water sampling at

Camp McCain. Pre-treatment samples were collected from Well #2 and Well #3, a post-treatment

sample of finished drinking water was also collected and analyzed. The only PFAS detected above

reporting limits among samples was Perfluorotetradecanoic acid (PFTeA), which was also

detected in the field reagent blank. No exceedances of the USEPA Health Advisory level were

observed in Camp McCain drinking water.

1.5.3 Hydrology

Surface water from Camp McCain drains into several watersheds. In order of greatest areal

coverage, Camp McCain drains to the Crowder Creek-Little Bogue, Sykes Creek-Batupan Bogue,

Redgrass Creek, Mouse Creek-Little Bogue, and Grenada Lake-Yalobusha River drainage

basins. These watersheds all lie within the Yalobusha River basin.

Various sections of the facility lie within these watersheds. Drainage from approximately 67

percent (%) of the facility, including the cantonment area, is collected into the Crowder CreekLittle Bogue watershed, drained mostly by Crowder Creek, Epison Branch, and tributaries of

Campbell Creek. The Sykes Creek-Batupan Bogue watershed drains approximately 28% of the

facility in the northwest. The wastewater treatment plant (WWTP) falls on the divide between

these two watersheds, with the majority of its footprint located within the latter. Both watersheds

eventually drain to the Batupan Bogue. The northeast section of the facility, approximately 5%,

drains north into the Redgrass Creek watershed. Redgrass Creek empties directly to Grenada

Lake, a reservoir approximately 3 miles north of Camp McCain that was formed by damming of

the Yalobusha River. Trace percentages of the facility drain to the Mouse Creek-Little Bogue

watershed in the east and the Grenada Lake-Yalobusha River watershed in the north.

Other surface water features within the facility include 30 ponds, 116 acres of wetlands, and Hunt

Lake. Hunt Lake is used for occasional training exercises, and recreational fishing is permitted in

the lake. Hunt Lake is directly north of the WWTP on a tributary of the Batupan Bogue. Surface

water features are shown in Figure 1-3.

1.5.4 Climate

The climate of the area surrounding Camp McCain is characterized by generally mild

temperatures year-round, but with a noticeable change of seasons. Limited climatological

data was available for the nearby City of Grenada. In February, the average high temperature

is 48.8 degrees Fahrenheit (°F), and the average low temperature is 26.5°F. In July, the

average high temperature is 92.9°F, and the average low temperature is 72.7°F. The annual

precipitation is approximately 46.46 inches, with April, the wettest month, having an average

of 8.56 inches of precipitation, and September, the driest month, having an average of 0.75

inches of precipitation. Snowfall in the area is less than 2 inches per year (National Oceanic

Atmospheric Administration [NOAA], 2019)
PFAS Preliminary Assessment Report

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1.5.5 Current and Future Land Use

Camp McCain’s current land use includes serving as a weekend training area for Mississippi

ARNG (MSARNG) units located in northern Mississippi and other National Guard and Reserve

units from Mississippi and adjacent states. Camp McCain currently accommodates training

activities at small arms ranges and non-firing tactical maneuver areas for armor, armored cavalry,

infantry, mechanized infantry, artillery, engineer, medical, aviation, and other troop units.

Numerous support facilities are also present within the cantonment, including maintenance shops,

dining halls, barracks, paint shop, fuel point, and recycling center. Reasonably anticipated future

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

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Water Body

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Direction

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Water Body

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PFAS Preliminary Assessment Report

Camp McCain, Mississippi

13

2. Fire Training Areas

No FTAs were identified at Camp McCain during the PA through interviews (Appendix B.1) or the

Environmental Data Resource Report (Appendix A). Interviewees (tenure dates back to 1985)

noted that emergency response for the facility is provided by the City of Elliott Volunteer Fire

Department.
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

14

3. Non-Fire Training Areas

Five non-FTAs where AFFF or other PFAS containing material were potentially stored and/or 

released were identified during the PA. All buildings in the cantonment area are equipped with 

water-based sprinkler systems and/or dry chemical ABC fire extinguishers. No AFFF Fire 

Suppression Systems exist at the facility. A description of each non-FTA is presented below, and 

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

Release Areas A and B – Wastewater Treatment Plant (WWTP) 

AFFF Disposal and Forced Discharge Area

The current Camp McCain WWTP was constructed in 2005 and is located approximately 0.5 miles 

northwest of the cantonment. The WWTP consists of three connected stabilization lagoons, three 

spray-irrigation fields, and a discharge treatment facility. The treatment facility collects overland 

flow from the irrigation fields for treatment by chlorination, dechlorination, and aeration prior to 

discharging to a dry drainage ditch that runs the southern length of the lagoons and connects to 

tributaries of the Batupan Bouge river. The system is unlined; however, according to an 

environmental assessment of the WWTP design, because soils are predominantly dense clay 

material, there is little percolation of effluent through soil from the lagoons and spray-fields 

(MSARNG, 2003). Sludge/biosolids have never been removed from the WWTP.

According to an interviewee, a single 5-gallon bucket of AFFF was present at Camp McCain when 

they arrived at the facility in 2005. At that time, the bucket was filled with 3 to 5 gallons of an 

unknown concentration or type of AFFF. Interviewees said that the AFFF was never used on fires 

or for other purposes and subsequently expired. Sometime between 2009 and 2011, the expired 

AFFF was slowly disposed of at a rate of approximately 1 gallon per month into the first, 

easternmost, lagoon of the WWTP (referred to as Release Area A).

In 2010, the WWTP was forced to discharge into the dry drainage ditch (Release Area B) to collect 

effluent for compliance sampling. No more than 10 gallons of post-treated effluent was discharged 

into the drainage ditch. Interviewees reported that water flows through the ditch during heavy 

rainfall and travels west towards an unnamed tributary of the Batupan Bouge river. Given the 

potential overlap in AFFF disposal to the WWTP and forced system discharge timeframes, 

Release Area B is also an area of potential PFAS release. 

No Suspected Release Area A – Fire Station

The Camp McCain Fire Station, referred to as No Suspected Release Area A, is a small two-bay 

building that contains one water-capable firetruck and a 1.5-gallon foam-capable Gator utility 

vehicle that has reportedly never been used with foam. Another foam-capable truck was 

purchased for the facility in the mid-1980’s but was never loaded with foam. The truck remained 

at the facility until it was moved to Camp Shelby sometime between 2007 and 2008. According to 

interviewees, AFFF has not been stored in the station since disposal of the single 5-gallon bucket 

between 2009 to 2011 (Section 3.1). During the VSI, two 5-gallon buckets of Class A foam were 

found stored on shelving within the station along with numerous dry chemical handheld 

extinguishers, and a portable Class A foam backpack unit was found stored within the firetruck 

cabinets (Appendix C). There is no evidence of AFFF use or storage at No Suspected Release 

Area A. 
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

15

No Suspected Release Area B – Aviation Operations 

The Aviation Operations training area, referred to as No Suspected Release Area B, consists of 

several paved landing pads for helicopter training maneuvers. Interviewees reported that training 

units bring their own extinguishers during exercises. Positive identification on these extinguishers 

was not possible during the VSI because training activities were not occurring; however, they 

were described as tall, wheeled, single cylinders that were most likely Halon, a non-PFAS 

containing suppressant. No AFFF extinguishers are stored at the facility, and no fueling operations 

are known to occur at the training area. There is no evidence of AFFF use or storage at No 

Suspected Release Area B.

No Suspected Release Area C – Dining Facilities (DFACs) 

There are five dining facilities (DFACs), referred to as No Suspected Release Area C, in the 

cantonment area; the cooking ranges within each building are equipped with a PyroChem, KClass (potassium carbonate-based) suppression systems. Outside of the kitchens, the buildings 

are equipped with portable ABC and K-class extinguishers only. There is no evidence of the use 

or storage of PFAS containing materials at No Suspected Release Area C. 

No Suspected Release Area D – Fuel Point 

The Fuel Point, referred to as No Suspected Release Area D, on Camp McCain is located within 

the northern area of the cantonment and is owned by the state of Mississippi and operated by the 

Defense Logistics Agency. At the time of the VSI, the Fuel Point had four 20-gallon dry chemical 

extinguishers stationed around the above ground storage tanks. No foam suppressants of any 

type were observed. No Suspected Release Area D is not suspected to be a potential release 

area.

No Suspected Release Area E – Paint Booth 

The Combined Support Maintenance Shop Paint Booth, referred to as No Suspected Release 

Area E, is centrally located within the cantonment. During the VSI, it was confirmed that the 

building is not equipped with any fire suppression system; only handheld dry chemical 

extinguishers are present. There are no suspected releases of AFFF at No Suspected Release 

Area E.
Cantonment

Release Area B

Release Area A

No Suspected

Release Area B

No Suspected

Release Area C

No Suspected

Release Area A

No Suspected

Release Area E

No Suspected

Release Area D

Epison Branch

Little Bogue

Crowder C reek

Big Bogue

0 600 1,200 2,400

Feet

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Potential PFAS Release

No Suspected Release

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Water Body

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PFAS Preliminary Assessment Report

Camp McCain, Mississippi

17

4. Emergency Response Areas

No emergency response areas were identified at Camp McCain during the PA through interviews

(Appendix B.1) or Environmental Data Resource Reports (Appendix A). Emergency services

for the facility are provided primarily by the nearby City of Elliott Volunteer Fire Department,

approximately 2.5 miles to the east-southeast.

Fire response at training ranges is operated by Range Control. Two pull-behind pump trailers,

each without foam capability, are the only vehicle-mounted fire suppression used by Range

Control. Wildfire fighting techniques are primarily Minimum Impact Suppression Techniques

(MISTs), such as digging fire lines, and prescribed burns are occasionally conducted.

Interviewees reported that no AFFF or other types of firefighting foam are used or stored by Range

Control.
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

18

5. Adjacent Sources 

One potential off-facility source of PFAS was identified during the PA. A description of the adjacent 

source is presented below and shown on Figure 5-1.

Rockwell International Wheel and Trim – Superfund Site 

A wheel cover manufacturing and chrome plating facility, originally operated by Rockwell 

International, followed by Textron Automotive Company and Grenada Manufacturing, was in 

operation north of the City of Grenada from 1966 to the early 2000’s. The site is listed on the 

USEPA’s Superfund National Priorities List for contamination of groundwater, surface water, and 

soil with trichloroethylene and hexavalent chromium, among other contaminants. The facility is 

currently run as a metal stamping operation by Grenada Manufacturing (USEPA, 2018). The 

superfund site is located downgradient of the facility, approximately 8 miles northwest from Camp 

McCain.

Chrome plating operations commonly involved PFAS-containing mist suppressants to reduce 

worker exposure to chromic acid mist resulting from chrome plating baths. Because former site 

use included chrome plating facilities and associated disposal areas (i.e., onsite landfills and 

wastewater lagoons), it is possible that PFAS-containing suppressants were used and potentially 

released to the environment at some point during the operational history of the plant.
YalobushaRiver

Riverdale Creek

Yalobusha

River

Yalobusha

River

Rockwell Grenada NPL Site

0 600 1,200 2,400

Feet

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Potential PFAS Release

No Suspected Release

Facility Boundary

Water Body

Wetland

River/Stream

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PFAS Preliminary Assessment Report

Camp McCain, Mississippi

20

6. Preliminary Conceptual Site Model

Based on the PA findings, one AOI was identified at Camp McCain: AOI 1 WWTP. The AOI location 

is shown on Figure 6-1. The following sections describe the CSM components and the specific 

preliminary CSM developed for AOI 1. The CSM identifies the three components necessary for a 

potentially complete exposure pathway: (1) source, (2) pathway, (3) receptor. If any of these 

elements are missing, the pathway is considered incomplete.

In general, the potential PFAS exposure pathways are ingestion and inhalation. Human exposure 

via the dermal contact pathway may occur, and current risk practice suggests it is an insignificant 

pathway compared to ingestion; however, exposure data for dermal pathways is sparse and 

continues to be the subject of PFAS toxicological study. Receptors at Camp McCain include site 

workers and construction workers, as well as off-facility residents and recreators. The preliminary 

CSM diagram for Camp McCain, depicted in Figure 6-2, indicates which specific receptors could 

potentially be exposed to PFAS. 

AOI 1: Release Areas A and B

Approximately 3 to 5 gallons of AFFF were disposed of in the WWTP’s eastern lagoon (Release 

Area A) over a period of 3 to 5 months sometime between 2009 and 2011. The lagoon system is 

connected in series with spray-irrigation fields and a treatment facility. In 2010, the WWTP was 

forced to discharge no more than 10 gallons of post-treatment effluent to a dry drainage ditch 

(Release Area B) to collect compliance samples (Section 3.1). The WWTP system (lagoons and 

irrigation fields) is unlined; however, dense clay soils are believed to restrict percolation of 

wastewater through soils. Regardless, deposition of PFAS into surface and subsurface soil, as 

well into lagoon sediments/biosolids, may have occurred at the WWTP and the dry ditch that runs 

along its southern boundary. AOI 1 includes the entirety of Release Areas A and B.

In their anionic forms, PFAS are water soluble and can migrate readily from soil to groundwater 

or surface water via leaching and runoff. PFAS may have migrated from the lagoon system into 

surface water via discharge of effluent to the southern dry ditch. There has not been a discharge 

of effluent into the ditch since 2010. During rainfall, rainwater bypasses the treatment facility and 

flows west towards an unnamed tributary of the Batupan Bouge river. Although dense clays may 

restrict the migration of wastewater/effluent to groundwater within the lagoons and irrigation fields, 

the pathway cannot be ruled out for off-facility discharges through the southern drainage ditch. 

Potential receptors in the area include on-facility site workers, construction workers, and 

trespassers, and off-facility residents and recreators. Site and construction workers may be 

exposed to PFAS through inhalation of airborne soil particulates or ingestion of surface soil during 

soil disturbing activities (i.e. maintenance and construction). Construction workers may 

additionally be exposed to PFAS by ingestion of subsurface soil during intrusive work. Site 

workers, construction workers, and trespassers at AOI 1 may additionally be exposed to PFAS in 

surface water and sediment/biosolids within the lagoons. Off-facility residents located 

downgradient from the Camp may be exposed to PFAS through ingestion of groundwater from 

potable wells or surface water and sediment from the unnamed tributary that the connects to the 

southern drainage ditch. 

Camp McCain obtains its drinking water from on-facility groundwater wells located cross-gradient 

to AOI 1. Sampling results from 2017 found that PFAS were detected in drinking water above the 

reporting limit, but no exceedances of the USEPA Health Advisory level were observed. However, 

because PFAS were detected, the drinking water pathway for on-facility site workers, construction 

workers, and off-facility residents is considered potentially complete. 
­ Figure 6-1

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Areas of Interest

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Potential PFAS Release

No Suspected Release

Facility Boundary

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Inferred Groundwater Flow Direction

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Water Supply Well

Rockwell Grenada NPL Site

0 700 1,400 2,800

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Cantonment

21
Media

SOURCE PATHWAY

AFFF 

disposed of in 

WWTP lagoon

PFAS in 

Surface Soil

Human 

Activities

Precipitation/ 

Run-Off

Leaching/ 

Infiltration

Airborne Soil 

particulate

Surface Soil 

at AOI

Surface 

Water/ 

sediment

Subsurface 

Soil

Shallow 

Groundwater

Source Release Mechanism Media Transport and Migration Media Exposure Routes

Inhalation of 

Dust

IngestionIngestion

Ingestion

Ingestion

Flow-Chart ContinuesPartial / Possible FlowIncomplete PathwayPotentially Complete PathwayComplete Pathway

LEGEND

Figure 

Preliminary Concep

AOI 1 Release A

Potential 

Off-Facility 

Source Not 

under 

Control of 

ARNG

AOI 1

PFAS in 

Surface 

Water

REHum

C

Site 

Worker

Cons

W

Site 

Worker

Cons

W

/ 

/ 

/ 

/

Notes:1. The resident and recreator receptors refer to an off-site receptor.2. Dermal contact exposure pathway is incomplete for PFAS.

/ 
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

23

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 Camp McCain. The PA findings are based 

on the information presented in Appendix A and Appendix B.

Findings

Table 7-1 presents the one AOI related to potential PFAS release was identified at Camp McCain 

during the PA (Figure 7-1).

Table 7-1 AOIs at Camp McCain

Area of Interest Name Used by Potential Release Dates

AOI 1 Release Areas A and B MSARNG Between 2009 and 2011

Based on potential PFAS releases at this AOI, there is potential for exposure to PFAS 

contamination in surface water and sediments/biosolids to all receptors via ingestion and 

inhalation of dust, surface soil to site and construction workers, and subsurface soil to construction 

workers via ingestion and inhalation. Off-facility residents and on-facility site and construction 

workers may potentially be exposed to PFAS in groundwater via ingestion.

The following areas shown in Table 7-2, and discussed in Section 3, were determined to have 

no suspected release.

Table 7-2 Areas of No Suspected Release

No Suspected 

Release Area Used by Rationale for No Suspected Release Determination

No Suspected 

Release Area A – Fire 

Station

MSARNG

No AFFF was stored in the station or the 

station’s firefighting vehicles. Primary firefighting 

capacity is provided by City of Elliott Volunteer 

Fire Department. Only Class A foams used.

No Suspected 

Release Area B –

Aviation Operations

MSARNG/Visiting 

Training Units

Firefighting support is self-provided by visiting 

units during training; single-cylinder systems 

described by interviewees are typical of Halonbased extinguishers.

No Suspected 

Release Area C –

DFACs

MSARNG

Fire suppression systems in the kitchens are 

potassium carbonate, non-AFFF based 

systems. Handheld extinguishers within the 

dining halls are ABC/K-class.

No Suspected 

Release Area D – 

Fuel Point

MSARNG

No AFFF based systems or extinguishers 

present. Dry chemical handheld extinguishers 

are present around the above ground storage 

tanks.

No Suspected 

Release Area E –

Paint Booth

MSARNG No fire suppression system present; dry 

chemical handheld extinguishers are provided.

Adjacent sources of PFAS surrounding Camp McCain were not identified during the PA; however, 

Rockwell International Wheel and Trim, a former chrome plating facility and superfund site, is 

located approximately 8-miles downgradient of Camp McCain.
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

24

Uncertainties

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

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

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

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

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

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

with personnel who had direct knowledge of PFAS use at the facility. Sometimes, the provided 

information was vague or conflicted with other sources. Gathered information has a degree of 

uncertainty due to the absence of written documentation, the limited number of personnel with 

direct knowledge due to staffing changes, the time passed since PFAS were first used (1969 to 

present), and a reliance on personal recollection. Inaccuracies may arise in potential PFAS 

release locations, dates of release, volume of releases, and the concentration of AFFF used. 

There is also a possibility the PA has missed a source of PFAS, as the science of how PFAS may 

enter the environment continually evolves.

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

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

interviewed for the same potential source area, and potential source areas were visually 

inspected.

Table 7-3 summarizes the uncertainties associated with the PA.

Table 7-3 Uncertainties

Area of Interest Source of Uncertainty

No Suspected Release Area B –Aviation 

Operations

Positive Identification of Halon-based 

extinguishers was unobtainable during the VSI. 

AOI 1 Release Area A The exact date is of when the expired AFFF was 

disposed of in the WWTP is unknown as well as 

the concentration and definitive volume released.

AOI 1 Release Area B Because the date of AFFF disposal is not known, 

it is unknown if the forced discharge of the 

system occurred before or after introduction of 

AFFF to the lagoon.

General Interviewee tenure dates back to 1985, 

information regarding activities conducted at 

Camp McCain as it relates to use the of PFAS or 

AFFF prior to 1985 was not available.

Potential Future Actions

Interviews and records (covering 1985 to present) indicate that former ARNG activities may have 

resulted in a potential PFAS release at the AOI identified during the PA. Based on the CSM 

developed for the AOI, there is potential for receptors to be exposed to PFAS contamination in 

soil, groundwater, surface water, and sediment at the AOI. Table 7-4 summarizes the rationale 

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

process and undergo an SI.

ARNG will evaluate the need for a SI at Camp McCain based on the potential receptors, the 

potential migration of PFAS contamination off the facility, and the availability of resources.
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

25

Table 7-4 PA Findings Summary

Area of Interest Rationale Potential Future Action

AOI 1 Release

Areas A and B

Approximately 3 to 5 gallons of AFFF was

disposed of in the WWTP’s eastern lagoon

between 2009 and 2011. Effluent was

potentially released to the southern drainage

ditch.

Proceed to an SI, focus on soil,

sediment, surface water, and

groundwater
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12420 Milestone Center Drive

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Cantonment

Release Area B

Release Area A

No Suspected

Release Area B

No Suspected

Release Area C

No Suspected

Release Area A

No Suspected

Release Area E

No Suspected

Release Area D

Little Bogue

Epison Branch

Big Bogue

Crowder Creek

AOI 1

Legend

Area of Interest

Potential PFAS Release

No Suspected Release

Facility Boundary

Water Body

River/Stream

0 600 1,200 2,400

Feet

1

Rockwell Grenada NPL Site

1

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8. References

Brown, G.F. and R. Adams 1943. Geology and Groundwater Supply at Camp McCain. Mississippi

State Geological Survey Bulletin.

Cushing, E.M., Boswell, E.H., and Hosman, R.L. 1964. General Geology of the Mississippi

Embayment: Water Resources of the Mississippi Embayment. Geological Survey Professional

Paper 448-B. USGS, Dept. of the Interior.

Darden, D. 1986a. Potentiometric Map of the Meridian-Upper Wilcox Aquifer in Mississippi, Fall

1983. U.S. Geological Survey Water Resources Investigations Report 86-4018.

Darden, D. 1986b. Potentiometric Map of the Lower Wilcox Aquifer in Mississippi, Fall 1982. U.S.

Geological Survey Water Resources Investigations Report 86-4059.

United States Environmental Protection Agency (USEPA). 2018. NPL List: Rockwell International

Wheel & Trim, Grenada, Mississippi.

Mississippi Army National Guard (MSARNG), 2003. Final Environmental Assessment, Proposed

Construction and Operation of a Wastewater Treatment Plant, Camp McCain Training Site,

Mississippi.

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

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

USACE, 2009. Draft Final Operational Range Assessment Program, Phase I Qualitative

Assessment Report, Camp McCain, Mississippi. Prepared by Malcolm Pirnie for USACE

Baltimore District, February 2009.

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

Preliminary Assessments under CERCLA. September.

United States Geological Survey (USGS), 1983. Duck Hill Quadrangle, Mississippi 7.5-Minute

Series, 1:24000 Scale.

USGS 1992. USGS Public and Private Supply Wells. Geographic information system shapefiles

for publicly and privately owned water wells monitored by the USGS.

http://www.maris.state.ms.us/HTM/DownloadData/Statewide-Theme.htm.

USGS, 2004. Quality of Water in the Unsaturated Zone at Camp McCain, Mississippi – 2002-

2004. U.S. Geological Survey Scientific Investigations Report 2004-5279.
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

Appendix A

Data Resources
PFAS Preliminary Assessment Report

Camp McCain, MS

Data resources will be provided separately on CD. Data resources for Camp McCain include:

Previous Investigations Completed

• 2018 The EDR Radius Maptm Report with GeoCheck®; Aerial Photo Decade Package; & 

Certified Sanborn Map Report; Target Property Camp McCain, 3152 James H. Biddy Rd., 

Grenada, MS 38901.

• 2018 Final Spill Prevention, Control, and Countermeasures Plan (SPCC) for Camp McCain 

at Grenada, MS. 

• 2017 Camp McCain Stormwater Pollution Prevention Plan, Volumes I & II.

Miscellaneous Documents 

• 2015 Camp McCain State Well Report Driller’s Log.

• 2014 MDEQ Drinking Water Well Permit.

• 2006 Operational Guidance Manual for Camp McCain WWTP.

• 2003 Final Environmental Assessment for the Proposed Construction of a Wastewater 

Treatment Plant at Camp McCain, Mississippi 
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

Appendix B

Preliminary Assessment Documentation
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

Appendix B.1

Interview Records
PA Interview Questionnaire - Other Facility:_Camp McCain, MS_ 

Interviewer:_ _ 

Date/Time:_6 March 2019 @ 0800_ 

Interviewee:___See Below________________

Title:__________________________________

Phone Number:_________________________

Email:_______________________________

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

Can you recommend anyone we can interview?

Y or N __________________________

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

, Environmental Officer, since 2010

, Fire Emergency Coordinator, since 2005

, Equipment Operator, since 1985

, Water & Wastewater Operator, since 1988

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

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

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

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

• Acquired a brand new fire truck in mid-1980’s that was foam capable. Foam 

was never put in the fire truck. The water tank was used to wash buildings. 

The fire truck was moved to Camp Shelby sometime between 2007 and 

2008. 

• Old AFFF & WWTP:

o One 5-gallon bucket of AFFF was present at Camp McCain in 2005 when 

started. At that time, the bucket was said to be partially 

full with between 3 and 5 gallons of concentrate. It is not known if or 

where the difference went. It was never used on fires or otherwise and 

subsequently went out of date. The manufacturer and % is unknown – the 

canister described as beige-ish in color with white lettering.

o Sometime between 2009-2011, the out-of-date AFFF was disposed of in 

the first pond (eastern most) of the Camp McCain WWTP. Over the 

course of 3-5 months, approx. 1-gallon at a time was poured into the first 

pond (approx. rate of 1-gal per month). All ponds are connected in 

succession.

o WWTP was thought to be lined but according to the WWTP operator it is 

not lined (see completion report for details). It is spray irrigated to spray 

fields to the east and north of the ponds then overflow routed through the

treatment facility which discharges to a dry ditch running the southern 

length of the ponds. The sludge has never been removed. 

o In 2010, a forced system discharge of the WWTP was produced to collect 

effluent samples from the point of discharge at the dry ditch. No more 

than 10-gallons of effluent was discharged into the dry ditch. The dry ditch 

does flow during heavy rain events and flows to west.

Known Uses

Use 

Procurement

Disposition

Storage (Mixed)

Storage (Solution)

Inventory, Off-Spec

Containment

SOP on Filling

Leaking Vehicles

Nozzle and Suppression 

System Testing

Dining Facilities

Vehicle Washing

Ramp Washing

Fuel Spill Washing and 

Fueling Stations

Chrome Plating or 

Waterproofing 
PA Interview Questionnaire - Other Facility:_Camp McCain, MS_ 

Interviewer:_ _ 

Date/Time:_6 March 2019 @ 0800_ 

• Fire Station and fire response:

o Fire truck is not foam capable. Storage cabinets in truck contain a Class A foam backpack 

portable unit. No AFFF stored in Fire Station, only two 5-gallon buckets of Class A foams. 

Also have a foam capable Gator (1.5-gal foam capacity) but it has never been used for foam.

o Wildfire fighting activities are predominantly Minimum Impact Suppression Techniques (MIST) 

such as digging fire lines

o Prescribed burns are conducted but no foams are used for wildfires

o Range/wildfire team is run by Range Control. First response to range fires is from Range 

Control – they have two pull behind pump trailers with no foam capabilities (water only). They 

do not have AFFF or other foams.

o Emergency response for the Camp is provided by the city of Elliott Volunteer Fire Dept. No 

fires to date.

o All buildings in cantonment have water sprinkler systems and/or dry chem ABC extinguishers

• Fuel Point: 

o Is State owned/ run by DLA. Fuel point has four 20-gallon dry chemical extinguishers. Zero 

foam.

• Dining Facilities (DFAC): 

o 5 DFACs in Cantonment. Cooking ranges within each have a PyroChem, K-Class 

suppression system (potassium carbonate based) with 2 tanks. Not AFFF. Rest of the building 

has no suppression system – only portable ABC and K-class extinguishers.

• CSMS Paint Booth: 

o Painting building located separate from CSMS building just to the south of it. There is no 

suppression system in the building. Only dry chem extinguishers are present. 

• Aviation Ops Training: 

o No portable AFFF extinguishers are stored at the facility for aviation operations. Training units 

bring own portable extinguisher units to landing pads during exercises – described as tall 

wheeled cylinders that have a single cylinder/canister – most likely Haylon. No fueling 

operations are known to occur at the training area. 

• Historical Training: 

o Outside training units bring own fire suppression in to the facility in the form of dry chem 

extinguishers. McCain hosts small arms training for FBI on occasion. Most training activities 

are weapons qualifications, Dry fire with the 109th, CTTT training, and Armor & Engineer units 

training. There are no engineer firefighting units at Camp McCain or within Mississippi. 

• Drinking Water Source:

o Camp water is provided by an on-site well that is ~6 years old. Completed in the Wilcox 

aquifer (see completion and permit reports), a confined aquifer. Down range (southeastern 

portion of the Camp) is connected to Hays Creek public water system. Most surrounding 

communities get drinking water from City of Grenada which pulls from the Wilcox aquifer.

• Adjacent sources: 

o Rockwell International Wheel & Trim Grenada NPL site approximately 5 miles NW of Camp 

McCain boundary (north of Grenada city). Was a former chrome plating facility. See 

Superfund site for information.

• Misc.

o On-site laundry facilities are not commercial. They have non-commercial washing machines 

for soldiers to use. No water proofing activities are conducted at Camp McCain.
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

Appendix B.2

Visual Site Inspection Checklists
Visual Site Inspection Checklist

Names(s) of people performing VSI:

Recorded by:

ARNG Contact:

Date and Time:

Method of visit (walking, driving, adjacent):

Source/Release Information

Site Name / Area Name / Unique ID: Camp McCain

13,027 acres

Historic Site Use (Brief Description):

Current Site Use (Brief Description):

Physical barriers or access restrictions:

1. Was PFAS used (or spilled) at the site/area? Y / N

1a. If yes, document how PFAS was used and usage time (e.g., fire fighting training 2001 to 2014):

2. Has usage been documented? Y / N

2a. If yes, keep a record (place electronic files on a disk): 

3. What types of businesses are located near the site? Industrial / Commercial / Plating / Waterproofing / Residential

3a. Indicate what businesses are located near the site

4. Is this site located at an airport/flightline? Y / N

4a. If yes, provide a description of the airport/flightline tenants:

March 6, 2019 0800

Walking/ Driving

Estabilshed in the early 1940s as a triangular division camp, Military training, tracked 

Military training, tracked vehicle training, equipment maintenance, tactical training, 

small 

vehicle training, equipment maintenance, tactical training, small arms training

Site / Area Acreage:

arms training

Access Resticted with a Security Gate and Guard

AFFF was never formally used at the site, but approximately 3-5 gallons of unused out-of-date AFFF (% and 

manufacturer unknown) was disposed of in the first pond of the WWTP over the course of 3-5 months 

sometime between 2009-2011

Rockwell International Wheel & Trim Grenada NPL site approximately 5 miles NW of Camp McCain 

boundary (north of Grenada city). Was a former chrome plating facility.

Page 1 of 4
Visual Survey Inspection Log

1. Does the facility have a fire suppression system? Y / N

1a. If yes, indicate which type of AFFF has been used:

1b. If yes, describe maintenance schedule/leaks:

Unknown, no known/ 

reported leaks

1c. If yes, how often is the AFFF replaced:

No AFFF Suppression systems

1d. If yes, does the facility have floor drains and where do they lead? Can we obtain an as built drawing?

No AFFF Suppression systems

Transport / Pathway Information

1. Does site/area drainage flow off installation? Y / N

1a. If so, note observation and location:

Drainage is generally to the southwest to the Batupan Bogue river

2. Is there channelized flow within the site/area? Y / N

2a. If so, please note observation and location: 

Stormwater culverts and convayances throughout the site

3. Are monitoring or drinking water wells located near the site? Y / N

3a. If so, please note the location: 

4. Are surface water intakes located near the site? Y / N

4a. If so, please note the location: 

5. Can wind dispersion information be obtained? Y / N

5a. If so, please note and observe the location.

6. Does an adjacent non-ARNG PFAS source exist? Y / N

6a. If so, please note the source and location.

6b. Will off-site reconnaissance be conducted? Y / N

Camp water is provided by an on-site well that is ~6 years old. Completed in the Wilcox aquifer; Domestic 

and public water supply wells located downgradient of Camp McCain (i.e., northeast, west, and southwest of 

the installation)

Rockwell International Wheel & Trim Grenada NPL site approximately 5 miles NW of Camp McCain 

boundary (north of Grenada city). Was a former chrome plating facility.

Other Significant Site Features: 

Migration Potential:

Fire suppression systems on site are either water spinkler, or dry chemical ABC extinguishers, Class-K 

suppression systems and Class-K extinguishers in dining facilities

Page 2 of 4
Visual Survey Inspection Log

1. Has the infrastructure changed at the site/area? Y / N

1a. If so, please describe change (ex. Structures no longer exist): 

2. Is the site/area vegetated? Y / N

2a. If not vegetated, briefly describe the site/area composition:

3. Does the site or area exhibit evidence of erosion? Y / N

3a. If yes, describe the location and extent of the erosion: 

4. Does the site/area exhibit any areas of ponding or standing water? Y / N

4a. If yes, describe the location and extent of the ponding: 

WWTP and various small lakes

Receptor Information

1. Is access to the site restricted? Y / N

1a. If so, please note to what extent:

2. Who can access the site? 

2a. Circle all that apply, note any not covered above: 

3. Are residential areas located near the site? Y / N

3a. If so, please note the location/distance: 

Rural Grenada, MS 0.4 miles to the west

4. Are any schools/day care centers located near the site? Y / N

4a. If so, please note the location/distance/type: 

5. Are any wetlands located near the site? Y / N

5a. If so, please note the location/distance/type: 

116 acres of wetlands spread across the facility

Site Workers / Construction Workers / Trespassers / Residential / Recreational 

Users / Ecological

Access restricted by gate with guard. 

Significant Topographical Features: 

Page 3 of 4
Visual Survey Inspection Log

Additional Notes

Photographic Log

Photo ID/Name Date & Location Photograph Description

Page 4 of 4
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

Appendix B.3

Conceptual Site Model Information
Preliminary Assessment – Conceptual Site Model Information

Site Name: Camp McCain, Mississippi

Why has this location been identified as a site? AFFF release between 2009-2011 into unlined

WWTP

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

Wheel & Trim Grenada NPL site approximately 5 miles NW of Camp McCain boundary -

downgradient

Training Events

Have any training events with AFFF occurred at this site? No

If so, how often? N/A

How much material was used? Is it documented? N/A

Identify Potential Pathways: Do we have enough information to fully understand over land surface 

water flow, groundwater flow, and geological formations on and around the facility? Any direct 

pathways to larger water bodies?

Surface Water:

Surface water flow direction? Generally to the southwest

Average rainfall? 54 inches annually

Any flooding during rainy season? Yes

Direct or indirect pathway to ditches? Yes

Direct or indirect pathway to larger bodies of water? Yes

Does surface water pond any place on site? Yes

Any impoundment areas or retention ponds? Yes – WWTP

Any NPDES location points near the site? Unknown

How does surface water drain on and around the flight line? N/A
Preliminary Assessment – Conceptual Site Model Information

Groundwater:

Groundwater flow direction? Regional Groundwater flow is to the Southwest (Darden, 1986b), 

Groundwater is believed to flow to the north, north of the watershed/ groundwater divide

Depth to groundwater? <1 to >50 feet bgs

Uses (agricultural, drinking water, irrigation)? Drinking, Commercial

Any groundwater treatment systems? No

Any groundwater monitoring well locations near the site? Yes, near Campbell Creek

Is groundwater used for drinking water? Yes

Are there drinking water supply wells on installation? Yes

Do they serve off-post populations? No

Are there off-post drinking water wells downgradient Yes

Waste Water Treatment Plant:

Has the installation ever had a WWTP, past or present? Yes

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

Do we understand the fate of sludge waste? Yes – not removed to date

Is surface water from potential contaminated sites treated? No

Equipment Rinse Water

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

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

use? Where does the rinse water flow after cleaning nozzles? N/A

3. Other? On-site laundry facilities are not commercial. They have non-commercial washing machines

for soldiers to use. No water proofing activities are conducted at Camp McCain.
Preliminary Assessment – Conceptual Site Model Information

Identify Potential Receptors:

Site Worker Yes

Construction Worker Yes

Recreational User Yes

Residential Yes

Child Yes

Ecological Yes

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

mixed rural residential, agricultural, with some industrial use

Documentation

Ask for Engineering drawings (if applicable).

Has there been a reconstruction or changes to the drainage system? When did that occur? No
PFAS Preliminary Assessment Report

Camp McCain, Mississippi

Appendix C

Photographic Log
Preliminary Assessment Report

Camp McCain, MS

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

AECOM

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Camp McCain Grenada, Mississippi

Photograph No. 1

Description:

Camp McCain Waste Water 

Treatment Plant (WWTP). 

Eastern most stabilization 

lagoon, location where out-ofdate AFFF was disposed of 

between 2009-2011. Standing 

on southeastern corner facing 

northwest. 

Date Taken:

6 March 2019

Photograph No. 2

Description:

WWTP: Southern drainage 

ditch. Black piping from 

WWTP effluent treatment 

facility visible in the lower 

righthand corner. Standing on 

eastern end facing southwest.

Date Taken:

6 March 2019 
Preliminary Assessment Report

Camp McCain, MS

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

AECOM

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Camp McCain Grenada, Mississippi

Photograph No. 3

Description: 

Camp McCain Fire Station.

Date Taken:

6 March 2019

Photograph No. 4

Description:

Camp McCain firetruck, this 

fire truck is not foam capable.

A portable Class A foam 

backpack is stored within its 

cabinets.

Date Taken:

6 March 2019
Preliminary Assessment Report

Camp McCain, MS

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

AECOM

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Camp McCain Grenada, Mississippi

Photograph No. 5

Description: 

Class A foam portable 

backpack unit stored in

firetruck storage cabinet. 

Date Taken:

6 March 2019

Photograph No. 6

Description:

Two 5-gallon buckets of Class 

A foams are stored in the fire 

station at Camp McCain.
Preliminary Assessment Report

Camp McCain, MS

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

AECOM

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Camp McCain Grenada, Mississippi

Photograph No. 7

Description: 

Gator utility vehicle unit (not 

foam capable) stored in the 

fire station. Not shown in 

photograph is the M1 Gator 

that has foam capability.

Date Taken:

6 March 2019

Photograph No. 8

Description:

Portable dry chemical fire 

extinguishers stored within the 

fire station.

Date Taken:

6 March 2019
Preliminary Assessment Report

Camp McCain, MS

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

AECOM

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Camp McCain Grenada, Mississippi

Photograph No. 9

Description:

Kitchen within DAFC. 

PyroChem K-class (potassium 

carbonate-based) fire 

suppression system.

Date Taken:

6 March 2019

Photograph No. 10

Description:

Kitchen within DFAC: 

Cooking Range Hood with 

PyroChem K-class (potassium 

carbonate-based) fire 

suppression system sprinklers.

Date Taken:

6 March 2019 
Preliminary Assessment Report

Camp McCain, MS

Perfluorooctane-Sulfonic Acid (PFOS) and 

Perfluorooctanoic Acid (PFOA) Impacted Sites

ARNG Installations, Nationwide

AECOM

APPENDIX C – Photographic Log

Army National Guard, Preliminary

Assessment for PFAS Camp McCain Grenada, Mississippi

Photograph No. 11

Description:

Helicopter Landing pad/ 

Aviation Operations Training 

Area.

Date Taken:

6 March 2019

Photograph No. 12

Description:

Interior of Paint Booth 

building showing floor drains 

and no fire suppression 

system. 

Date Taken:

6 March 2019