Addendum to the 

Perfluorinated Sulfonates

Data Report

3M Decatur, Alabama Facility

Site-Related Environmental 

Monitoring Program

September 2014

13P-0512-2

3M Company

St. Paul, Minnesota

®
ADDENDUM TO THE 

PERFLUORINATED SULFONATES 

DATA REPORT

3M DECATUR, ALABAMA FACILITY

SITE-RELATED ENVIRONMENTAL MONITORING PROGRAM

September 2014

Prepared for

3M COMPANY

St. Paul, Minnesota 55144

Prepared by

WESTON SOLUTIONS, INC.

West Chester, Pennsylvania 19380

W.O. No. 02181.129.138.0001
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TABLE OF CONTENTS

Section Page

1. INTRODUCTION.......................................................................................................... 1-1

1.1 BACKGROUND ................................................................................................. 1-1

1.2 DESCRIPTION OF HISTORICAL AND PRESENT PRODUCTION OF 

SULFONATE PRODUCTS ................................................................................ 1-3

1.3 SULFONATES SAMPLING PROGRAM .......................................................... 1-4

1.4 ANALYTICAL DATA QUALITY AND DATA REDUCTION 

PROCESS ............................................................................................................ 1-4

1.5 REPORT ORGANIZATION ............................................................................... 1-6

2. ENVIRONMENTAL SETTING .................................................................................. 2-1

2.1 SITE LOCATION AND BACKGROUND INFORMATION ............................ 2-1

2.2 TOPOGRAPHY AND DRAINAGE ................................................................... 2-2

2.3 GEOLOGY .......................................................................................................... 2-3

2.4 HYDROGEOLOGY ............................................................................................ 2-4

2.5 FORMER SLUDGE INCORPORATION AREA ............................................... 2-6

3. SUMMARY OF FIELD ACTIVITIES ........................................................................ 3-1

3.1 SOIL AND SEDIMENT ...................................................................................... 3-1

3.1.1 Phase 3 On-Site Soil Sampling in the FSIA Area................................. 3-1

3.1.2 Phase 3 Off-Site Soil and Sediment Sampling at the Wetlands 

Edge Environmental Center Area ......................................................... 3-1

3.1.3 Phase 3 Off-Site Soil Sampling at Monitoring Well Locations ............ 3-2

3.2 GROUNDWATER .............................................................................................. 3-4

3.2.1 On-Site Groundwater Monitoring ......................................................... 3-4

3.2.2 Phase 3 Off-Site Groundwater Summary ............................................. 3-6

3.2.3 Regional Groundwater Sampling and Analysis and Conclusion of 

the Phase 3 Off-Site Groundwater Monitoring Program ...................... 3-8

3.2.4 Phase 3 Assessment of Off-Site Waste Disposal Facilities .................. 3-9

3.3 FISH SAMPLING ............................................................................................. 3-14

3.4 SUPPLEMENTAL SURFACE WATER SAMPLING ..................................... 3-15

3.5 CHARACTERIZATION ACTIVITIES IN SUPPORT OF ON-SITE 

REMEDIAL DESIGN AND OFF-SITE ENVIRONMENTAL 

ASSESSMENT .................................................................................................. 3-16

3.5.1 Avenue A Drainageway ...................................................................... 3-16

3.5.2 On-Site Soil Sampling Adjacent to FSIA Field 6 ............................... 3-17

3.5.3 Browns Ferry Road Site ...................................................................... 3-18

4. FINDINGS ...................................................................................................................... 4-1

4.1 SOIL AND SEDIMENT ...................................................................................... 4-1
TABLE OF CONTENTS (Continued) 

Section Page

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4.1.1 On-Site Soil ........................................................................................... 4-1

4.1.2 MOU Phase 3 Off-Site Soil and Sediment at the WEEC ..................... 4-1

4.1.3 Off-Site Soil .......................................................................................... 4-2

4.2 GROUNDWATER .............................................................................................. 4-2

4.2.1 Hydrogeology ....................................................................................... 4-2

4.2.2 On-Site Groundwater ............................................................................ 4-4

4.2.3 Off-Site Groundwater ........................................................................... 4-6

4.2.4 Phase 3 Assessment of Off-Site Regional Waste Disposal 

Facilities ................................................................................................ 4-7

4.3 FISH SAMPLING ............................................................................................... 4-8

4.4 SURFACE WATER ............................................................................................ 4-9

4.5 CHARACTERIZATION ACTIVITIES IN SUPPORT OF REMEDIAL 

DESIGN ............................................................................................................. 4-10

4.5.1 Avenue A Drainageway ...................................................................... 4-11

4.5.2 On-Site Soil Sampling Adjacent to FSIA Field 6 ............................... 4-12

4.5.3 Browns Ferry Road Site ...................................................................... 4-13

5. REFERENCES ............................................................................................................... 5-1

LIST OF APPENDICES

Appendices are provided on CD 

Appendix A Laboratory Data Packages 

 A-1 GLP Interim Report Data Packages

A-2 ISO Report Data Packages 

 A-3 Third-Party (AXYS Analytical) Data Packages 

Appendix B Fish Sampling and Analysis for PFOS in Largemouth Bass from the 

Tennessee River in the Vicinity of the 3M Decatur Facility (WESTON, 

2012b) 

Appendix C Tennessee River Perfluorochemical (PFC) Assessment Fish Tissue and 

Surface Water Sampling Report October – December 2012 (WESTON, 

2013e) 
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LIST OF FIGURES 

Title 

Figure 2-1 Site Location Map

Figure 2-2 Site Features

Figure 2-3 Former Sludge Incorporation Area

Figure 3-1 PFBS, PFHS and PFOS Concentrations in On-Site Former Sludge Incorporation 

Area Soils (March 2010)

Figure 3-2 Wetlands Edge Environmental Center Average Sediment and Soil PFBS, PFHS 

and PFOS Concentrations (June 2010)

Figure 3-3 Phase 3 Off-Site Monitoring Well Soil Boring Average PFBS, PFHS and PFOS 

Concentrations (September – October 2010 – August 2011)

Figure 3-4 On-Site Chemical Plant and Closed Landfill Area Groundwater PFBS, PFHS and 

PFOS Concentrations (October 2013)

Figure 3-5 On-Site Former Sludge Incorporation Area Groundwater PFBS, PFHS and PFOS 

Concentrations (March 2014)

Figure 3-6 Groundwater Average PFBS, PFHS and PFOS Concentrations On-Site Former 

Sludge Incorporation Area Pump Test (June 2012 and December 2012)

Figure 3-7 Wastewater Treatment Plant Area Groundwater Average PFBS, PFHS and PFOS 

Concentrations (April 2012)

Figure 3-8 Groundwater Average PFBS, PFHS and PFOS Concentrations Wastewater 

Treatment Plant Area Extraction Wells (June 2012 – June 2014)

Figure 3-9 Off-Site Phase 2 and Phase 3 Monitoring Wells Groundwater Average PFBS, 

PFHS and PFOS Concentrations (March – April 2012)

Figure 3-10 Morgan County Landfill Groundwater Monitoring Wells Average PFBS, PFHS 

and PFOS Concentrations (November 2010 and April 2012)

Figure 3-11 Groundwater Average PFBS, PFHS and PFOS Concentrations, Chemical Plant 

and Closed Landfill Area (April 2012)

Figure 3-12 Former Sludge Incorporation Area Groundwater Average PFBS, PFHS and PFOS 

Concentrations (March-April 2012)

Figure 3-13 Residuum Groundwater Elevation Contour Map
LIST OF FIGURES (Continued) 

Title

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Figure 3-14 Bedrock Groundwater Elevation Contour Map

Figure 3-15 Regional Disposal Facility Map

Figure 3-16 BFI Morris Farms Landfill Groundwater Average PFBS, PFHS and PFOS 

Concentrations (March 2011)

Figure 3-17 Browns Ferry Road Site Groundwater Average PFBS, PFHS and PFOS 

Concentrations (August 2013)

Figure 3-18 Fish Filet Tissue Average PFOS Concentrations, Bakers Creek and Tennessee 

River (April 2012)

Figure 3-19 Surface Water Average PFOS Concentrations, Bakers Creek and Tennessee River 

(April 2012)

Figure 3-20 Fish Filet Tissue Average PFBS Concentrations, Tennessee River (October – 

November 2012)

Figure 3-21 Fish Filet Tissue Average PFHS Concentrations, Tennessee River (October – 

November 2012)

Figure 3-22 Fish Filet Tissue Average PFOS Concentrations, Tennessee River (October – 

November 2012)

Figure 3-23 Surface Water – Fish Reaches Average PFBS, PFHS and PFOS Concentrations, 

Tennessee River (November 2012)

Figure 3-24 Surface Water – Transects Average PFBS, PFHS and PFOS Concentrations, 

Tennessee River (December 2012)

Figure 3-25 Avenue A Surface Water and Groundwater Average PFBS, PFHS and PFOS 

Concentrations (June – July 2010)

Figure 3-26 Avenue A Soil and Sediment Average PFBS, PFHS and PFOS Concentrations 

(June – July 2010)

Figure 3-27 Additional Avenue A Groundwater Average PFBS, PFHS and PFOS 

Concentrations (January 2011)

Figure 3-28 Avenue A Soil and Sediment Average PFBS, PFHS and PFOS Concentrations 

(January 2011)
LIST OF FIGURES (Continued) 

Title

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Figure 3-29 Area Adjacent to Field 6 Soil PFBS, PFHS and PFOS Concentrations (December 

2012)

Figure 3-30 Browns Ferry Road Site Surface Water Average PFBS, PFHS and PFOS 

Concentrations (February 2012 – August 2013)

Figure 3-31 Browns Ferry Road Site Sediment PFBS, PFHS and PFOS Concentrations 

(February 2012)

Figure 4-1 Site Features and NPDES Remedial Action Agreement Mitigation Areas
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LIST OF TABLES 

Title 

Table 1-1 Summary of Sulfonate Sampling Program (October 2004 to April 2008)

Table 1-2 Summary of the Sulfonates Sampling Program (March 2010 – June 2014)

Table 3-1 On-Site FSIA PFBS, PFHS and PFOS Surface Soil Concentrations (March 2010)

Table 3-2 PFBS, PFHS and PFOS Results for Wetlands Edge Environmental Center Soils and 

Sediments (June 2010)

Table 3-3 PFBS, PFHS and PFOS Results for Off-Site Monitoring Wells Soil Boring Samples 

(October 2010 – August 2011)

Table 3-4 On-Site Groundwater Monitoring Wells

Table 3-5 On-Site Chemical Plant and Closed Landfill Wells PFBS Analytical Results (2010 

– 2013)

Table 3-6 On-Site Chemical Plant and Closed Landfill Wells PFHS Analytical Results (2010 

– 2013)

Table 3-7 On-Site Chemical Plant and Closed Landfill Wells PFOS Analytical Results (2010 

– 2013)

Table 3-8 On-Site FSIA Monitoring Wells PFBS Analytical Results (2010 – 2014)

Table 3-9 On-Site FSIA Monitoring Wells PFHS Analytical Results (2010 – 2014)

Table 3-10 On-Site FSIA Monitoring Wells PFOS Analytical Results (2010 – 2014)

Table 3-11 On-Site Former Sludge Incorporation Area Pump Test Groundwater PFBS, PFHS 

and PFOS Concentrations (June and December 2012)

Table 3-12 On-Site Wastewater Treatment Plant Groundwater Average PFBS, PFHS and PFOS 

Concentrations (April 2012)

Table 3-13 On-Site Wastewater Treatment Plant Extraction Wells Groundwater PFBS, PFHS 

and PFOS Concentrations (2012-2014)

Table 3-14 Off-Site Monitoring Well Construction Data

Table 3-15 Phase 2 and Phase 3 Off-Site Groundwater PFBS Concentrations (October 2010 – 

April 2012)
LIST OF TABLES (Continued) 

Title

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Table 3-16 Phase 2 and Phase 3 Off-Site Groundwater PFHS Concentrations (October 2010 – 

April 2012)

Table 3-17 Phase 2 and Phase 3 Off-Site Groundwater PFOS Concentrations (October 2010 – 

April 2012)

Table 3-18 PFBS, PFHS and PFOS Concentrations in Morgan County Landfill Monitoring 

Wells (November 2010 and April 2012)

Table 3-19 BFI Morris Farm Landfill Groundwater PFBS, PFHS and PFOS Concentrations 

(March 2011)

Table 3-20 Browns Ferry Road Site Groundwater PFBS, PFHS and PFOS Concentrations 

(April 2012, October 2012 and August 2013)

Table 3-21 Fish Morphometrics and PFOS Concentrations in Fish Filet in Bakers Creek (April 

2012)

Table 3-22 PFOS Concentrations and Sample Parameters in Surface Water in Bakers Creek 

(April 2012)

Table 3-23 PFBS, PFHS and PFOS Concentrations in Fish Filet in the Tennessee River, 

(October-November 2012)

Table 3-24 PFBS, PFHS and PFOS Concentrations in Surface Water in the Tennessee River – 

Fish Reach Locations (November 2012)

Table 3-25 PFBS, PFHS and PFOS Concentrations in Surface Water in the Tennessee River – 

Surface Water Transects (December 2012)

Table 3-26 PFBS, PFHS and PFOS Concentrations for Avenue A Groundwater, Surface Water, 

Soil and Sediment Samples (June - July 2010)

Table 3-27 PFBS, PFHS and PFOS Concentrations for Avenue A Groundwater Samples 

(January 2011)

Table 3-28 On-Site Avenue A Soil and Sediment PFBS, PFHS and PFOS Concentrations 

(January 2011)

Table 3-29 On-Site Area Adjacent to Field 6 Soil Boring PFBS, PFHS and PFOS 

Concentrations (December 2012)
LIST OF TABLES (Continued) 

Title

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Table 3-30 Browns Ferry Road Site Surface Water PFBS, PFHS and PFOS Concentrations 

(February 2012, October 2012 and August 2013)

Table 3-31 Browns Ferry Road Site Sediment PFBS, PFHS and PFOS Concentrations 

(February 2012)

Table 4-1 Site Features and NPDES Remedial Action Agreement Mitigation Areas
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LIST OF ACRONYMS

3M 3M Company, including its former subsidiary, Dyneon LLC

ADAR Addendum to the Data Assessment Report

ADEM Alabama Department of Environmental Management 

APSDR Addendum to the Perfluorinated Sulfonates Data Report

BFRS Browns Ferry Road Site 

bgs below ground surface

BP BP Chemical Company 

DAR Data Assessment Report 

Dyneon Dyneon, LLC 

EPA U.S. Environmental Protection Agency

FDNR Future Data Needs Assessment Report

FML flexible membrane liner

FMS field matrix spike

FSIA Former Sludge Incorporation Area

ft bgs feet below ground surface 

ft msl feet above mean sea level 

FTA Fire Training Area

GAC granular activated carbon

GLP Good Laboratory Practices 

GWTP groundwater treatment plant 

IS internal standard

ISO International Organization for Standardization

ITP Independent Third Party 

LMS laboratory matrix spike

LOI Letter of Intent

LOQ limit of quantitation

MOU Memorandum of Understanding 

ND not detected

ng/g (ppb) nanograms per gram (parts per billion) 

ng/L (ppt) nanograms per liter (parts per trillion)

ng/mL (ppb) nanograms per milliliter (parts per billion)

NPDES National Pollutant Discharge Elimination System 

NR not reported

PCG Peer Consultation Group
LIST OF ACRONYMS (Continued) 

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PFBS perfluorobutane sulfonate

PFC perfluorochemical

PFHS perfluorohexane sulfonate

PFOA perfluorooctanoic acid 

PFOS perfluorooctane sulfonate

PMN Premanufacturing Notice 

PSDR Perfluorinated Sulfonates Data Report

QA quality assurance

QA/QC quality assurance/quality control 

QC quality control 

RCRA Resource Conservation and Recovery Act

RM river mile

SLHEA screening level human exposure assessment

SRS surrogate recovery standard

TSCA Toxic Substances Control Act

USACE U.S. Army Corps of Engineers

U.S. United States of America

VOC volatile organic compound

WEEC Wetlands Edge Environmental Center 

WESTON® Weston Solutions, Inc.

WWTP wastewater treatment plant 
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1. INTRODUCTION

1.1 BACKGROUND

Effective October 25, 2004, the 3M Company (3M), its wholly-owned subsidiary at the time, 

Dyneon LLC (Dyneon), and the United States Environmental Protection Agency (EPA) entered 

into a Memorandum of Understanding (MOU) that contained the commitment of 3M and 

Dyneon (hereafter together referred to as 3M), to conduct a Perfluorooctanoic Acid (PFOA) SiteRelated Environmental Monitoring and Assessment Program (Program) for the 3M Decatur 

Alabama facility (EPA, 2004). In the U.S., the products and business of Dyneon LLC were 

integrated into 3M effective January 1, 2011. 

The goal of the PFOA Site-Related Environmental Assessment Program was to characterize 

sources and the presence of PFOA in various environmental media, on- and off-site, associated 

with the manufacturing operations at the 3M Decatur facility. Additionally, and separate from 

the MOU activity, 3M voluntarily carried out a concurrent sampling and analysis program for 

three other perfluorochemical (PFC) substances. These compounds were: 

• Perfluorobutane sulfonate (PFBS).

• Perfluorohexane sulfonate (PFHS). 

• Perfluorooctane sulfonate (PFOS). 

In accordance with the requirements of the MOU, Work Plans were developed for sampling 

environmental media for PFOA at the 3M Decatur, Alabama facility. The perfluorinated 

substances PFBS, PFHS and PFOS (hereinafter referred to as sulfonate or sulfonates) samples 

were collected in the same manner specified in the PFOA work plans.

From October 2004 to April 2008, field activities were conducted in accordance with the MOU 

PFOA Phase 2 Work Plan (WESTON, 2004), and the sulfonate samples were voluntarily 

collected by 3M. More than 1,000 environmental samples were collected for sulfonate analysis, 

and the results were submitted to the EPA in the September 2008 Perfluorinated Sulfonates 

Data Report for the 3M Decatur, Alabama Facility Site-Related Environmental Monitoring 
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Program (PSDR) (WESTON, 2008a). A summary of the samples collected for the PSDR is 

presented in Table 1-1. 

The data presented in the PSDR generally corresponded to the PFOA data presented in the 

PFOA Data Assessment Report for the 3M Decatur, Alabama Facility Site-Related 

Environmental Monitoring Program (DAR) (WESTON, 2008b). However, the PSDR included 

additional data from Phase 2 that was received after the DAR was submitted to the EPA (postPhase 2 data). 

3M submitted the DAR, along with a PFOA Screening Level Human Exposure Assessment

(SLHEA) (WESTON, 2008c) and a Future Data Needs Assessment Report (FDNR) (WESTON, 

2008d), to the EPA in January 2008. The DAR, SLHEA and FDNR were subjected to peer 

review by a panel of nine scientists known as the Peer Consultation Group (PCG) assembled by 

an independent third party (ITP), Menzie-Cura & Associates, Inc. The PCG convened on April 

16 – 17, 2008 in a public meeting in Decatur, Alabama, to discuss their comments on the Phase 2 

DAR, SLHEA and FDNR documents. On June 1, 2008, the ITP issued a final summary report, 

Report of the Peer Consultation for a PFOA Site-Related Environmental Assessment Program 

for the 3M Property located in Decatur, Alabama (PCG Final Report) (PCG, 2008). 

The EPA accepted the PFOA Phase 3 Work Plan (WESTON, 2009) on November 19, 2009. 

The PFOA data collected during the MOU Phase 3 Work Plan activities, post-Phase 2 data 

(WESTON, 2008e) and additional data described below are included in the Addendum to the 

Data Assessment Report for the 3M Decatur, Alabama Facility (ADAR) (WESTON, 2013a) that 

was submitted to the EPA in November 2013. In addition, more details on sample collection 

activities are provided in a series of quarterly status reports prepared throughout the Phase 3 

program (WESTON, 2010a-d; 2011a-d; 2012a-d; and 2013b-d). For brevity, these quarterly 

status reports are referred to by the end date of each quarter; e.g., the July 1, 2013 to September 

30, 2013 Quarterly Status Report is referred to as the September 30, 2013 Quarterly Status 

Report. Consistent with previous activities, 3M voluntarily collected sulfonate samples during 

the MOU Phase 3 activities. In addition, sulfonates were included as part of additional 

characterization activities performed for a PFC remediation program to minimize the potential 
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human exposure and migration pathways. This work was conducted with the involvement and 

approval of the Alabama Department of Environmental Management (ADEM). Remediation 

activities performed at the 3M Decatur facility are described in Subsection 4.6. 

This Addendum to the Perfluorinated Sulfonates Data Report (APSDR) includes a summary of 

the characterization activities and the results of sample analysis. More than 900 sulfonate 

samples were collected from March 2010 to June 2014. A summary of the samples collected for 

the APSDR is presented in Table 1-2. The results from these samples are summarized in Section 

3 and serve as a basis for the findings presented in this report. 

The data and information generated were collected using scientific practices, protocols and 

procedures that have been designed to ensure data of highest quality, objectivity, utility and 

integrity. The data were used to assess the presence of sulfonates in environmental media in and 

around the 3M Decatur facility. This APSDR is a robust summary of all the data and information 

generated.

1.2 DESCRIPTION OF HISTORICAL AND PRESENT PRODUCTION OF 

SULFONATE PRODUCTS

The manufacturing of PFOS-related substances began in the early 1960s at the 3M Decatur, 

Alabama facility. Production of these substances continued until 2001 following the voluntary 

phase-out announcement by 3M in May 2000. Following the production phase-out of PFOSrelated and PFHS-related products, 3M began production of PFBS-related substances after 

obtaining approval from EPA pursuant to the Premanufacturing Notice (PMN) requirements 

under the Toxic Substances Control Act (TSCA). 

Because production of these three types of perfluorochemicals either occurred historically 

(PFOS-related and PFHS-related) or is occurring currently (PFBS-related), the ultimate 

degradation end products of these substances were the specific compounds analyzed as part of 

this assessment program. Thus, the three compounds analyzed in this voluntary sulfonates 

characterization program were PFOS, PFHS and PFBS. 
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1.3 SULFONATES SAMPLING PROGRAM

The sulfonates sampling program was composed of the collection of data in various media and 

locations to characterize the presence of sulfonates both on-site and off-site. The sulfonate 

samples were voluntarily collected by 3M during field work under the MOU, supplemental work 

activities and additional studies with the input and involvement of ADEM. Section 3, which is 

organized according to environmental media, includes a description of the characterization tasks 

and sampling activities conducted for the sulfonates sampling program. The sampling activities 

were determined based upon the MOU requirements for the PFOA on-site and off-site 

characterization program and the remedial design data needed for the voluntary site remediation 

activities. 

1.4 ANALYTICAL DATA QUALITY AND DATA REDUCTION PROCESS

Analyses of sulfonate samples (i.e., PFBS, PFHS and PFOS) were performed by the 3M 

Environmental Laboratory, St. Paul, Minnesota, unless otherwise noted. With the exception of 

the split sample analysis performed by AXYS Analytical laboratories for the fish study (see 

Subsection 3.3) all the analytical data presented herein was provided by the 3M Environmental 

Laboratory following the Good Laboratory Practices (GLP) Protocol 10-01-02. The GLP 

protocol and the specified analytical methods contain rigorous quality assurance/quality control 

(QA/QC) provisions, including in-phase audits, full documentation, matrix spikes for every 

sample collected and analyzed, and thorough reviews by the laboratory’s Quality Assurance 

Unit. WESTON also performed independent quality assurance (QA) reviews during the course 

of the work. 

The analytical methods reflect the significant developmental effort that had been applied to 

refine earlier methods to obtain quantitative analytical data for PFOA at parts per trillion 

(nanograms per liter [ng/L]; parts per trillion [ppt]) limits of quantitation (LOQs). In accordance 

with the requirements of GLP Protocol 10-01-02, the target LOQ for analyses of aqueous 

samples (i.e., groundwater, surface water and porewater) was 25 ng/L (0.025 nanograms per 

milliliter [ng/mL]; parts per billion [ppb]). For analyses of soil and sediment samples, the target 

LOQ was 200 ng/kg (0.200 nanograms per gram [ng/g]; ppb). In most environmental studies, 

duplicate analyses are generally performed at a frequency of one duplicate or replicate per 10 or 
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1-5

20 samples (5 to 10%). To maximize the robustness of the characterization data, all Phase 3 

sample analyses included either a laboratory replicate sample analysis, a field duplicate sample 

analysis, or both. By accounting for media and analytical variability, the availability of multiple 

results for each sampling location provides more reliable estimates of PFC concentrations. 

Samples collected for sulfonate analyses under the GLP 10-01-02 Protocol were aggregated into 

subsets by media type and location to provide data in a timely fashion for informing later phases 

of on-site and off-site data collection. The resulting subsets of analytical results were provided in 

a series of 35 Interim Reports. In addition to the analysis of samples under the GLP protocols, 

some samples were analyzed by the same analytical methods under the 3M Environmental 

Laboratory International Organization for Standardization (ISO) certification. The QA/QC 

provisions associated with analyses under ISO are extensive and produce data of comparable 

quality to the GLP analyses.

A variety of quality control (QC) samples were analyzed to provide data for assessing analytical 

accuracy and to demonstrate that the method was under control. These included field matrix 

spike (FMS) and/or laboratory matrix spike (LMS) samples, stable isotope-labeled internal 

standards (ISs) and surrogate recovery standards (SRS). Complete details on the analytical 

process for each sample group were documented in their respective Interim Reports and 

associated raw data packages and submitted with the quarterly status reports. 

In instances where the QC data on matrix spike recoveries associated with a sample result were 

outside the 70 to 130% target range of acceptance for an assessed accuracy of ±30%, results with 

matrix spike recoveries 50 to 150% were reported with an expanded assessment of uncertainty 

based on method performance. For samples with matrix spike recoveries below 50% or above 

150%, the data are not reported (NR). The NR designation does not connote either high or low 

sample concentrations but rather reflects only that analytical conditions did not meet the criteria 

for FMS recoveries (aqueous samples) or LMS (solid samples) that would allow reporting of 

quantitative data with an assessed accuracy of ±50%. Other data reported with non-numerical 

values include the results that are assigned “not detected” (ND) because the analyte was not 

detected above the LOQ. 
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For all environmental media samples, primary and field duplicate samples were analyzed. The 

primary and duplicate results were reduced to a single value in order to simplify reporting. The 

data reduction process for this APSDR consisted of calculating the average concentration 

(arithmetic mean) for the sets composed of numeric values. In instances with mixed numeric

values and non-numeric values (ND; less than the LOQ), the numeric values were carried 

through to represent the media concentrations. In these instances, the data reduction convention 

described above is conservative, consistent with past reporting of PFC data by 3M, and results in 

overestimation of actual concentrations. 

1.5 REPORT ORGANIZATION

This APSDR is organized into the following sections: 

• Section 1 – Introduction. This section contains background information on PFC 

assessment programs for the 3M Decatur Site and a discussion on sulfonates. 

• Section 2 – Environmental Setting. This section contains a brief description of the 

site location and background information, topography and drainage, geology, 

hydrogeology, as well as an overview of the background and setting of the former 

sludge incorporation area (FSIA). 

• Section 3 – Summary of Field Activities. This section contains a description of the 

activities that were conducted for the sulfonate program, including the locations, 

types and numbers of samples collected, rationale for sample collection, and methods 

of collection. 

• Section 4 – Findings. This section contains a summary of key data findings of the 

sulfonates program. 

• Section 5 – References.

Tables and figures are provided at the end of each section for ease of review.
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SECTION 1

TABLES
Media Location Primary Samples Collected (Total) Field Duplicate Samples Collected (Total)(11) Media Location Primary Samples Collected (Total) Fie

Sam

(

SEMW(2) 32 32 Off-Site(5) 31 

FSIA MW 23 23 Residential Wells 2 

Near SEMW 41 0 Soil Off-Site MW(6) 30 

FSIA Soil(3) 325 16 Tennessee River/Bakers Creek(7) 73 

Vegetation FSIA(3) 31 0 Off-Site Marsh 3 

Small Mammals FSIA(4) 30 0 Tennessee River/Bakers Creek 30 

Avenue A 2 2 Off-Site Marsh & Drainageway 42 

Goose Pond 3 3 Porewater Tennessee River 12 

Avenue A 6 0 Fish - Filet(8) Tennessee River/Bakers Creek 115 

Goose Pond 2 0

Sanitary Wastewater 3M WWTP 1 1

496 77 Clams Tennessee River/Bakers Creek 12 

Decatur Utilities WTP 5 

Decatur Utilities Supply(9) 4 

FSIA = Former Sludge Incorporation Area West Morgan/East Lawrence WTP 4 

Muscle Shoals WTP 3 

SEMW = Selected Existing Monitoring Wells Florence WTP 3 WTP = Water Treatment Plant Tennessee Valley Authority WTP 3 WWTP = Wastewater Treatment Plant Sheffield WTP 3 

Decatur Utilities WTP 1 

West Morgan/East Lawrence WTP 1 

Dry Creek WWTP - Influent 1 

Dry Creek WWTP - Effluent 2 

Sludge Dry Creek WWTP 2 Leachate Morgan County Landfill 2 

501 

(1) Total samples collected includes duplicate samples.(2) Includes on-site monitoring wells 220R, 220L, 226R, 226L, 310R, 317L, 320L and 327R.(3) Including Field 14 and the background location.(4) Including Field 14.(5) Includes off-site monitoring well clusters (610R/S/L, 602R/S/L, 603R/S/L, 604R/L and 605R/S/L), monitoring well cluster 138R/S/L and the groundwater well that previously supplied water to the off-(6) Samples collected during the installation of off-site residuum wells (601R, 602R, 603R, 604R, 605R and 138R).(7) Includes samples collected from tributaries flowing into Bakers Creek.(8) Two species.(9) Samples collected from various points along the Decatur Utilities Supply system.(10) Samples collected before treatment at WTPs.(11)Duplicate samples were collected at all aqueous sample locations. 

Surface Water

On-Site

Sediments

Surface WaterSediment

117 

Soil

Tennessee River/Bakers Creek Fish - Whole 

Body(8)

Table 1-1 

3M Decatur, AL Facility

October 2004 - April 2008

Off-Site

Groundwater

Summary of the Sulfonate Sampling Program

Groundwater

Public Water (Finished Water)

TOTAL(1) ON-SITE SAMPLES: 

TOTAL(1) OFF-SITE SAMPLES: 

Raw Water(10)

Wastewater

MW = Monitoring Wells

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Table 1-2

Summary of the Sulfonates Sampling Program 

March 2010 - June 2014

3M Decatur, AL Facility

Media Location Primary Samples 

Collected (Total)

Field Duplicate 

Samples 

Collected 

(Total)(11,12)

Media Location

Primary 

Samples 

Collected Total

Field Duplicate 

Samples 

Collected 

(Total)(11,12)

Facility Wells (1) 144 144 Off-Site(5) 58 58

FSIA MW(2) 251 251 Off-Site Waste Disposal Locations(6) 76 76

WWTP Wells (3) 68 68 Off-Site MWs(7) 18 1

Avenue A 13 13 Off-Site soil (WEEC) 10 1

FSIA(4) 32 3 Tennessee River/Bakers Creek(8) 138 138

Avenue A 126 15 Off-Site Waste Disposal Locations(9) 13 13

Surface Water Avenue A 12 12 Off-Site Marsh (WEEC) 15 2

Sediment Avenue A 52 4 Browns Ferry Road Site 5 0

698 510 Fish - Filet(10) Tennessee River(8) 179 18

512 307

Notes:

FSIA = Former Sludge Incorporation Area

MW = Monitoring Wells

WEEC = Wetlands Edge Environmental Center

(1) Includes on-site monitoring wells 203L, 210R [1], 216R [1], 220R/L, 222R, 227R/L,310R, 317L, 324L, 328R/L, 330R/L, 335R, RW312R, RW327R, RW331S and GRSO4 (composite of landfill extraction wells). (2) Includes on-site monitoring wells 130 R/S/L, 131 R/S/L, 132R/S/L, 133 R/S/L, 134 R/S/L, 135 R/S/L, 136 S/L, 137 S/L, 138 R/S/L, 140R, 141R, 142R, 143R,144-PZE1 [1], 144-PZE-2 [1], 144S [4], 145S and CW26C/L. (3) Includes WWTP extraction wells WW8R, WW9R, WW10R and WW11R and TW1R to TW6R. (4) Includes on-site soil sampling in Field 5, Field 11, Field 8C and the area adjacent to Field 6. (5) Includes off-site monitoring well clusters 601S, 602S/L, 603S/L, 604R/S/L, 605R/L, 607R/S/L, 609R/L, 610S/L, 611R/L and BP Wells MW-121 and MW-47. (6) Samples collected at Morgan County Landfill, Browns Ferry Road Site and the former BFI Morris Farms Landfill. (7)

Samples collected during the installation of off-site well clusters (607, 609, 610 and 611) and in the vicinity of BP Wells MW-47 and MW-121. (8) Includes samples collected from Wheeler and Wilson Reservoir. (9) Samples collected in the vicinity of the Browns Ferry Road Site. (10) Two species of fish. (11) Duplicate samples were collected at all aqueous sample locations. (12) Does not include third party split samples.

Groundwater

Sediment

TOTAL ON-SITE SAMPLES: 

TOTAL OFF-SITE SAMPLES: 

On-Site Off-Site

Groundwater

Soil

Soil Surface Water

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2-1

2. ENVIRONMENTAL SETTING 

2.1 SITE LOCATION AND BACKGROUND INFORMATION

As shown in Figure 2-1, the 3M Decatur, Alabama facility is located approximately 2 miles 

northwest of the City of Decatur along the south bank of the Wheeler Reservoir (Tennessee 

River) and west of the confluence of Bakers Creek. The property is bounded on the west, south 

and east primarily by Finley Island Road, State Highway 72, and State Docks Road, respectively. 

The Decatur area has a significant industrial base. Other facilities in proximity to the 3M Decatur 

facility include:

• Ascend Performance Materials plant (formerly Solutia, Inc.) to the east (and east of 

Bakers Creek). 

• BP Chemical Company (BP) facility to the west. 

• Port of the City of Decatur – east of the facility and on the west side of Bakers Creek.

• Daikin manufacturing facility – east of the facility and on the west side of State 

Docks Road and on the west side of Bakers Creek. 

• Toray Fluorofibers America, Incorporated – east of the facility and east of Bakers 

Creek.

• Decatur Utilities – east of the facility and east of Bakers Creek.

• AlphaPet Facility – west of the facility and on the west side of Finley Island Road. 

• Mallard-Fox Creek Industrial Park – northwest of the facility along the Tennessee 

River. 

3M began operations at the Decatur, Alabama facility in 1961 with the construction of the 

chemical manufacturing plant (Chemical Plant). In 1962, the facility was expanded to include a 

film manufacturing plant (Film Plant). As the facility continued to develop, the Dyneon facility, 

which makes advanced fluoropolymer materials, was established on 3M’s manufacturing site in 

the southern portion of the Chemical Plant area (Figure 2-2).

Process wastewater from the 3M plant operations has been treated in the on-site wastewater 

treatment plant (WWTP). The treated water has been discharged to the Tennessee River under a 
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2-2

National Pollutant Discharge Elimination System (NPDES) permit issued by ADEM. From 1978 

to 1998, sludge from the on-site WWTP was incorporated by means of subsurface slurry 

injection to fields occupying the southern portion of the 3M property. The sludge was generated 

from the treatment of the manufacturing facility wastewater. The area was designated as a sludge 

incorporation area, and these activities were conducted under an NPDES permit. The FSIA is 

shown in Figure 2-2 and discussed further in Subsection 2.5. 

2.2 TOPOGRAPHY AND DRAINAGE

An understanding of site topography and drainage patterns is integral to the identification and 

characterization of potential surface transport pathways. The shape and slope of the land surface 

directs overland flow of stormwater and sediment during a precipitation event. Additionally, 

surface features also provide indirect information related to subsurface conditions, such as 

groundwater flow patterns. Groundwater flow in shallow groundwater zones (and to some extent 

in deeper groundwater zones) generally tends to mimic surface topographic features, such that 

groundwater may be predicted to flow from elevation highs to elevation lows. Because of the 

prevalence of limestone as bedrock in the area, localized dissolution of the rock may result in 

depressed physiographic features indicative of potential collapse of the bedrock and possible 

increased groundwater flow. Thus, the following description of the 3M Decatur site topography 

and drainage systems is provided as a means to further understand the surface and subsurface 

potential migration pathways for PFCs, which served as a basis for the characterization activities 

performed at the site. 

The 3M Decatur facility is located in the Highland Rim section of the Interior Low Plateau’s 

physiographic province. This province is characterized by gently rolling hills, broad low 

drainage divides and gentle stream gradients. Topographic elevations for the 3M site range from 

approximately 635 feet above mean sea level (ft msl) in the west-central portion of the site to 

approximately 550 ft msl along the Tennessee River. 

Surface water discharges from the property by means of modified natural and man-made ditches. 

Stormwater runoff from non-process areas in the northern half of the property are directed to 

small drainage conveyance features that drain directly into the Tennessee River or a primary 

stormwater drainage (the Avenue A drainageway) on the southern side of the manufacturing 
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2-3

areas that direct flow toward Bakers Creek. Surface runoff in the plant production areas is 

conveyed to the on-site WWTP for treatment prior to discharge through the site’s NPDESpermitted outfall. 

Stormwater runoff from the central and southern portions of the property is directed via natural 

and man-made contouring to the east, south and west, ultimately discharging to the Tennessee 

River via Bakers Creek. Flow to the west is directed to an un-named drainage feature originating 

immediately west of the 3M property and extending south-southeast back toward the 3M 

property, crossing the southwest corner of the 3M property along Field 14 and continuing under 

U.S. Highway 20 and east to Bakers Creek immediately south of U.S. Highway 20. The western 

portion of this tributary occurs within the Wetlands Edge Environmental Center (WEEC) and is 

represented by a poorly defined drainage connecting broad areas of wetlands, marsh and wooded 

swamp. 3M has investigated this drainage course as part of the MOU activities. Upon entering 

Bakers Creek, flow continues northward, discharging into the Tennessee River immediately east 

of the 3M Decatur facility (Figure 2-2).

The Tennessee River is impounded downstream of the plant by the Wheeler Dam, forming the 

Wheeler Reservoir. The dam and water levels are managed by the U.S. Army Corps of Engineers 

(USACE). Flow within Wheeler Reservoir is to the west. The reservoir has a mean summer pool 

elevation of 556 ft msl and a 100-year flood zone elevation of 568 ft msl. During winter months, 

the pool level in the reservoir is lowered by the USACE by approximately 5 to 10 feet to help 

manage the increased rainfall during this period. Although eastern portions of the site lie within 

the 100-year flood zone, the industrialized portions of the site are entirely above the 100-year 

flood zone. 

2.3 GEOLOGY

Knowledge of site geology is integral to understanding the potential transport pathways in the 

subsurface. In general, the vertical geologic profile for soil and bedrock associated with the 3M 

Decatur site may be characterized as three somewhat distinct zones: the residuum, the epikarst, 

and bedrock. The hydrostratigraphic zones are described as follows. 
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• Residuum – The residuum represents the zone of unconsolidated soil. Residuum at the 

3M Decatur site may be described as silty sand to clayey sand alluvial sediments with 

varying percentages of rounded to sub-rounded chert and sandstone gravel of alluvial 

origin (associated with the Tennessee River system) that overlay saprolite from the 

underlying limestone bedrock. Saprolite refers to soil derived from the complete 

weathering of a rock unit. In this case, the saprolite is characterized by sandy silt to 

clayey silt with weathered to fresh chert and limestone fragments. The saprolite zones 

vary considerably in thickness depending on the local potential for bedrock weathering, 

and are often reflected as a transitional zone from completely weathered soil material to 

an intermixed zone of soil and residual host rock. Residuum at the 3M Decatur facility 

typically ranges in thickness from 10 to 50 feet. 

• Epikarst – The transition from completely weathered rock (saprolite) to fresh bedrock is 

referred to as the epikarst. More specifically, the epikarst refers to the contact between 

fresh bedrock and overlying unconsolidated soil. The epikarst thickness at the 3M 

Decatur facility is highly variable and ranges from a few feet to greater than 50 feet. 

• Bedrock – Bedrock refers to the geologic units underlying the unconsolidated (residuum) 

zone. Bedrock underlying the 3M Decatur facility is known as the Tuscumbia limestone. 

This unit may be generally described as interbedded gray fine-grained micrite (finegrained limestone) to coarse-grained sparite (crystalline limestone) to biosparite 

(fossiliferous limestone) with locally abundant chert nodules and beds. The rock has

undergone recrystallization reducing the porosity of the unit. As a result, groundwater 

movement within the Tuscumbia Limestone is restricted to fractures, joint planes and 

faults. 

Core data recovered at the 3M Decatur site indicate that fractures, represented primarily 

by bedding-controlled fractures, decrease in size and frequency with depth. In most areas, 

these fractures are less than 10 millimeters in thickness. With increased depth, these 

fractures are often observed filled with calcite further restricting the potential for 

groundwater flow. Conversely, fractures observed near the current bedrock surface may 

be highly weathered or expanded via dissolution, resulting in highly permeable flow 

conduits. 

A detailed discussion of these geologic features is provided in the 2008 PSDR. 

2.4 HYDROGEOLOGY 

Geologic characteristics described in the previous section influence the flow of subsurface 

groundwater and constituents that are dissolved or suspended in it. The primary water-bearing 

zones (in order from shallow to deep) that are evident at, and adjacent to, the 3M Decatur facility 

include the following: 
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2-5

• Residuum - The residuum shallow water-bearing zone (water table) may be defined as 

an unconfined aquifer found within the unconsolidated soil at the site. Boring data 

suggest that residuum groundwater is largely unrestricted within the residuum zone 

although perching may occur locally at the contact between the upper sequence of 

alluvial sediments and the underlying saprolite due to a change in composition and grain 

size. In general, groundwater flow within the residuum zone closely mimics surface 

topography, allowing for the prediction of general groundwater flow directions based on 

physiographic features. Monitoring wells screened into this unit are designated with an 

“R” suffix (e.g., 137R). 

• Epikarst – The transitional weathering attributed to the epikarst zone is most commonly 

reflected by an increase in chert and residual limestone clasts. The increase in gravel- and 

boulder-sized clasts is also reflected by a marked increase in groundwater flow 

(permeability). The distinction of this zone from the overlying residuum zone is 

subjective due to its transitional nature; however, the change in permeability observed 

between the epikarst and underlying bedrock is usually abrupt. 

Groundwater associated with the deeper mature epikarst zones may be regarded as semiconfined to confined, due to the presence of residual beds of resistant bedrock 

interspersed in completely weathered rock. As a result, it is not uncommon to observe 

potentiometric differences in the groundwater depths between the epikarst and residuum 

groundwater zones. However, as a rule, it is generally accepted that communication 

between the residuum and epikarst zones readily occurs. As with the residuum

groundwater zone, groundwater flow within the epikarst zone often reflects surface 

topography. 

Because of the higher permeability exhibited within the epikarst zone, this zone is the 

most transmissive and tends to be the preferred pathway for lateral groundwater flow. 

Monitoring wells screened into this unit are designated with an “S” suffix (e.g., 137S). 

• Bedrock - The bedrock water-bearing zone is restricted to fractures within the 

Tuscumbia Limestone, and may be described as largely confined to semi-confined in 

nature. Fractures observed in shallow bedrock are usually larger and may be expanded by 

dissolution, resulting in the formation of open conduits to voids able to transport large 

volumes of water in a short amount of time. With increased depth, these fractures rapidly 

decrease in magnitude and may become filled with calcite or iron precipitation until the 

flow is negligible. As a result, it is generally accepted that most groundwater movement 

associated with the bedrock occurs in the shallower depths. Monitoring wells screened 

into this unit are designated with an “L” suffix (e.g., 137L). 

In areas of advanced epikarst development where the bedrock surface may be irregular 

with extreme vertical relief, it is possible for bedding-controlled fractures within 

competent bedrock to be exposed to epikarst zones allowing for increased 

communication between the two zones. Water-bearing fractures occurring below the 

potential depth of weathering are presumed to have limited access to overlying water 

zones due to their confined nature and so remain largely isolated. 
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2-6

Because of the increased confinement of the bedrock groundwater zone, flow in this 

zone, although it has a tendency to mimic surface profile, may contradict predicted flow 

directions due to the pressure differentials developed in the fracture systems. 

A detailed discussion on the hydrogeology at and in the vicinity of the 3M Decatur facility is 

provided in the 2008 PSDR.

2.5 FORMER SLUDGE INCORPORATION AREA

From 1978 to 1998, 3M incorporated sludge from the on-site wastewater treatment plant by 

means of subsurface injection in an on-site area designated as the sludge incorporation area. 

Historically, sludge incorporation was undertaken, as an alternative to off-site sludge disposal, to 

utilize the nitrogen content, organic matter, phosphorus and other essential elements contained in 

the sludge for soil enrichment and crop production. This activity was conducted by 3M under 

ADEM National Pollutant Discharge Elimination System (NPDES) Permit No. AL0000205. The 

FSIA, as shown in Figure 2-3, was comprised of 13 application fields and two control fields 

where no sludge was applied. 

The sludge generated at the WWTP originated from the treatment of manufacturing facility 

wastewater, and contained approximately 1 to 3% solids. Sludge was hauled as a slurry by tank 

truck from the WWTP to the incorporation zone. The tank truck was equipped with a series of 

nozzles that injected the sludge approximately 1 foot below ground surface (ft bgs). Subsurface 

sludge incorporation was conducted in accordance with the NPDES permit. No direct surface 

application of sludge was permitted or believed to have occurred. 

3M discontinued land application of sludge in 1998. The FSIA is no longer cropped and has 

reverted to natural vegetation. The 3M property, including the FSIA, is marked as a “no 

trespassing” zone and is routinely patrolled by 3M security personnel. An impermeable cap is 

being constructed by 3M over most of the FSIA as a means to accomplish the following: 

• Isolate PFC-impacted soil from direct human contact, release to the air or contact 

with stormwater.

• Minimize potential vertical migration to groundwater via infiltration to groundwater. 
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2-7

This impermeable cap installation program is being performed by 3M under an NPDES 

Remedial Action Agreement between 3M and ADEM (ADEM, 2008). In addition, other areas at 

the facility are or will be undergoing remediation under this program, including the installation 

of an impermeable cap in the vicinity of Avenue A and the dredging of sediment from the 

Avenue A drainageway. 
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SECTION 2

FIGURES
504

Tennessee River

3M Decatur 

Alabama 

Facility

Finley 

Island

Road

State

Docks

Road

Highway 20/72

Bakers Creek

Daikin

Ascend Performance

Materials

(Formerly Solutia, Inc.)

BP

Chemical

Co.

DeBruce Grain

(Formerly Cargill, Inc.)

Mallard - Fox

Creek Industrial Park

Alpha Pet

Facility

Wetlands Edge

Enviromental Center

Decatur

Utilities

Toray Fluorofibers

America, Inc.

Port of the

City of Decatur

£¤72

£¤31

£¤72

£¤31

UV24

UV67

UV24

24

6th

Beltline

Joe Wheeler Wilson

Moulton

72 Wilson 72

UV24

UV24

Decatur

Trinity BBaakkeerrss CCrreeeekk

504

Tennessee River

3M Decatur 

Alabama 

Facility

Finley 

Island

Road

State

Docks

Road

Highway 20/72

Bakers Creek

Daikin

Ascend Performance

Materials

(Formerly Solutia, Inc.)

BP

Chemical

Co.

DeBruce Grain

(Formerly Cargill, Inc.)

Mallard - Fox

Creek Industrial Park

Alpha Pet

Facility

Wetlands Edge

Enviromental Center

Decatur

Utilities

Toray Fluorofibers

America, Inc.

Port of the

City of Decatur

£¤72

£¤31

£¤72

£¤31

UV24

UV67

UV24

24

6th

Beltline

Joe Wheeler Wilson

Moulton

72 Wilson 72

UV24

UV24

Decatur

Trinity BBaakkeerrss CCrreeeekk

Figure 2-1

Site Location Map

0 0.5 1

Miles μ

Legend:

3M Decatur, AL Facility

File: Y:\3MDec\MXD\former_sludge_inc_area.mxd, 9/8/2014 11:46:41 AM, ricksc

Alabama

City Boundary

Major Roads

Highways

Local Roads
Field 12

Field 13

Goose 

BP Property Pond

Bakers 

Creek

Closed

 Landfill

Off-Site

Swamp

Finley Island Road

Field 9

Norfolk Southern Railroad

Field 6

Field 8a

Field 3

Field 6 Field 2

Field 7

Field 1

Field 8a Field 4

State Docks Road

Field 10

Field 11

Field 5

Nebo Road

Highway 20/72

Field 14

Tennessee River/

Wheeler Reservoir

Film 

Plant

Chemical 

Plant

Field 8c

Daikin

Former Sludge Basins

(Closed)

Wastewater

Treatment

Plant Area

Former

Sludge

Incorporation 

Area

Dyneon

Outfall 001

Off-Site

Pond/Marsh

Ascend

Performance

Materials

Former Location

Buildings 2, 48 and 49

Fire Training

Area

Avenue A

Drainage

Wetlands Edge

Enviromental Center

(WEEC)

Bakers Creek

Field 12

Field 13

Goose 

BP Property Pond

Bakers 

Creek

Closed

 Landfill

Off-Site

Swamp

Finley Island Road

Field 9

Norfolk Southern Railroad

Field 6

Field 8a

Field 3

Field 6 Field 2

Field 7

Field 1

Field 8a Field 4

State Docks Road

Field 10

Field 11

Field 5

Nebo Road

Highway 20/72

Field 14

Tennessee River/

Wheeler Reservoir

Film 

Plant

Chemical 

Plant

Field 8c

Daikin

Former Sludge Basins

(Closed)

Wastewater

Treatment

Plant Area

Former

Sludge

Incorporation 

Area

Dyneon

Outfall 001

Off-Site

Pond/Marsh

Ascend

Performance

Materials

Former Location

Buildings 2, 48 and 49

Fire Training

Area

Avenue A

Drainage

Wetlands Edge

Enviromental Center

(WEEC)

Bakers Creek

μ 0 500 1,000

Feet

Legend:

3M Decatur, AL Facility

Daikin Property

File: Y:\3MDec\MXD\site_feat_No_swflow.mxd, 8/21/2014 4:42:29 PM, ricksc

Figure 2-2

Site Features

Buildings

3M Decatur Property Boundary

Drainage to Bakers Creek
Field 12

Field 13

Closed

 Landfill

Finley Island Road

Field 9

Norfolk Southern Railroad

Field 6

Field 8a

Field 3

Field 6 Field 2

Field 1

Field 8a Field 4

State Docks Road

Field 10

Field 8b

Field 11

Field 5

Nebo Road

Highway 20/72

SWMU 4

Field 8c

DAIKIN

Field 14

(Control Field)

Field 7

(Control Field)

Field 12

Field 13

Closed

 Landfill

Finley Island Road

Field 9

Norfolk Southern Railroad

Field 6

Field 8a

Field 3

Field 6 Field 2

Field 1

Field 8a Field 4

State Docks Road

Field 10

Field 8b

Field 11

Field 5

Nebo Road

Highway 20/72

SWMU 4

Field 8c

DAIKIN

Field 14

(Control Field)

Field 7

(Control Field)

Figure 2-3 μ Former Sludge Incorporation Area

0 250 500

Feet

3M Decatur, AL Facility

Daikin Property

Legend

File: \\Fsfed01\TIG\3MDec\MXD\Chemical_Plant\planning_area.mxd, 09-Jul-09 14:59, ricksc

Proposed Capped Areas
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3-1

3. SUMMARY OF FIELD ACTIVITIES

The sulfonates sampling program included the collection of data in various media and locations 

to characterize the presence of sulfonates both on-site and off-site. This section presents the 

technical approach used for performing field work under the MOU and the supplemental work 

activities. As noted previously, replicate sulfonate samples were generally collected along with 

PFOA samples generated per the MOU. The subsections are organized according to 

environmental media. Each subsection includes a description of the characterization tasks and 

the sampling activities conducted to fulfill the identified data needs and a summary of the 

analytical results. The sampling activities were generally determined based upon the MOU 

requirements for the PFOA on-site and off-site characterization program and the remedial design 

data needed for the voluntary site remediation activities. 

As described in Subsection 1.4, all samples were submitted to the 3M Environmental Laboratory 

in St. Paul, Minnesota, for sulfonate analysis, unless otherwise noted. 

3.1 SOIL AND SEDIMENT

3.1.1 Phase 3 On-Site Soil Sampling in the FSIA Area

Sampling of surface (0 to 6 inch bgs) and subsurface (1 to 1.5 ft bgs) soils in the FSIA Fields 5, 

8C and 11 was performed in March 2010. This sampling was conducted to provide additional 

characterization of soil PFC concentrations in the FSIA fields as an input for the engineering 

design and construction of the multilayer cap currently being installed on the FSIA under the 

NPDES Remedial Action Agreement between 3M and ADEM. 

A summary of the soil analytical data is provided in Table 3-1 and Figure 3-1. The analytical 

data package is provided in Interim Report 01 (Appendix A-1). 

3.1.2 Phase 3 Off-Site Soil and Sediment Sampling at the Wetlands Edge 

Environmental Center Area

As described in the 2008 PSDR, sediment sampling was conducted in the off-site drainage area 

maintained by the WEEC on the BP property. The WEEC is located immediately west of the 3M 

Decatur facility’s FSIA (Figure 2-2). This area was included in the assessment upon the 
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3-2

discovery that the WEEC pond/marsh was supplied with groundwater that was impacted by 

PFCs. 

In August 2007, sediment samples were collected from 14 locations in the WEEC pond area 

(EP01 through EP14), five locations in the drainageway upstream of the WEEC pond area 

(DU01 through DU05), two samples in the WEEC wetland area (DS01 and DS02) and two 

samples from an isolated pond southwest and not connected to the WEEC pond (WP01 and 

WP02). The WEEC pond and swamp are depicted in Figure 2-2. A summary of the sediment 

analytical data was provided in the 2008 PSDR. 

Based upon these findings and with approval from the property owner, 3M subsequently 

developed a work plan and removed the sediment from the WEEC pond to a depth of 3 feet 

followed by installation of a flexible membrane liner (FML) and clean soil backfill to restore the 

pond. The sediment removal project commenced in 2009 and was completed in 2010 with 

ADEM’s approval. 

In June 2010, additional field sampling activities were performed at the WEEC area in 

conjunction with samples from the MOU PFOA Phase 3 Work Plan (WESTON, 2009). The field 

sampling activities included collection of 10 soil samples and 15 sediment samples from four 

transects established perpendicular to flow within the swamp area. Detailed information on these 

field activities is provided in the June 30, 2010 Quarterly Status Report (WESTON, 2010b) and 

the December 31, 2010 Quarterly Status Report (WESTON, 2010d). 

A summary of the sediment and soil analytical data is provided in Table 3-2 and Figure 3-2. The 

analytical data package is provided in Interim Report 03 (Appendix A-1).

3.1.3 Phase 3 Off-Site Soil Sampling at Monitoring Well Locations

The Phase 3 Work Plan included the installation of off-site groundwater monitoring wells and 

collection of surface and subsurface soil samples during well installation (see Subsection 3.2.2). 

Soil samples were collected from the well soil borings at intervals to evaluate the potential 

vertical distribution trends in the deeper soil horizons. The depths established for sample 

collection were as follows:
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3-3

• 0 to 12 inches below grade. 

• 1 to 2 feet below grade. 

• 4 to 5 feet below grade. 

• At the water table in the vadose zone (capillary fringe).

Four off-site well clusters (i.e., 607, 609, 610 and 611) were installed between October 2010 and 

August 2011. The Phase 3 Work Plan under the MOU called for six additional new well cluster 

locations. However, two of the well clusters were not constructed because existing wells were 

used in their place with EPA approval. These included the proposed monitoring well clusters 606 

and 608. Proposed well cluster 606 was replaced by sampling existing monitoring wells 

maintained by the BP facility (i.e., MW-47 and MW-121). Surface soil samples were collected 

proximate to the MW-47 and MW-121 well heads. Proposed well cluster 608 was eliminated and 

replaced by groundwater data generated by sampling the existing upgradient monitoring wells 

maintained by the Morgan County landfill (MW13S, MW-13I and MW13B) contemporaneously 

with other Phase 2 and Phase 3 monitoring wells. Soil samples were not collected from the 

Morgan County landfill location (see Subsection 3.2.2 for further discussion). 

Surface soil samples were collected from the 0- to 12-inch depth interval. Once the surface 

sample was collected, the rig was positioned at the location and drilling commenced for the 

residuum monitoring well. Subsurface soil samples were collected at the designated depths using 

split-barrel samplers and hollow-stem auger drilling techniques. Descriptions of the subsurface 

soil sampling activities are provided in the September 30, 2010 Quarterly Status Report 

(WESTON, 2010c) and the December 31, 2010 Quarterly Status Report (WESTON, 2010d) for 

wells 607 and 611R, 609R, 609L, 611R and 611L; in the March 31, 2012 Quarterly Status 

Report (WESTON, 2012a) for wells 607L, 610R and 610L; and in the September 30, 2011 

Quarterly Status Report (WESTON, 2011c) for the locations near BP wells MW-47 and MW121. A summary of the soil analytical data is provided in Table 3-3 and Figure 3-3. The 

analytical data packages are provided in Interim Reports 12, 20 and 21 (Appendix A-1). 
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3.2 GROUNDWATER

3.2.1 On-Site Groundwater Monitoring

On-site groundwater monitoring for sulfonates has been conducted since March 2003 when 

sampling commenced at eight Letter of Intent (LOI) wells located in the northern portion of the 

3M Decatur facility. During Phase 2, a total of 27 groundwater monitoring wells were installed 

in the FSIA from October 2004 through January 2005. The eight initially monitored wells and 

the 27 groundwater monitoring wells installed during Phase 2 are listed in Table 3-4. 

During Phase 3, five additional groundwater wells (140R, 141R, 142R, 143R and 144S) were 

installed in the FSIA to replace wells that were abandoned during cap installation and to enhance 

the monitoring coverage in the FSIA. The wells were installed in August to September 2010. In 

addition, groundwater monitoring and extraction wells were installed in the WWTP area as 

described in Subsection 3.2.1.3. 

3.2.1.1 Wells in the Chemical Plant Area and Northeast of the Closed Landfill

3M conducts routine groundwater monitoring for volatile organic compounds (VOCs) at certain 

wells in accordance with an agreement with ADEM under the Resources Conservation and

Recovery Act (RCRA) program. 3M chose to obtain samples for sulfonates analysis from some 

of these wells located in the chemical plant. In addition, groundwater sampling was performed in 

the area northeast of an on-site landfill, previously closed under ADEM authorization. The wells 

sampled and a summary of the groundwater sulfonates analytical data are provided in Tables 3-5 

through 3-7, for PFBS, PFHS and PFOS, respectively. The well locations and the results from 

the October 2013 (i.e., fourth quarter 2013) sampling event are depicted in Figure 3-4. Analytical 

data packages for the on-site wells in the chemical plant area and northeast of the closed landfill 

are provided in Interim Reports 02, 09, 17, 22, 27 and 36 (Appendix A-1) and ISO13-05-01 and 

ISO13-05-04 (Appendix A-2).

3.2.1.2 Wells and Pump Test in the FSIA

As part of the FSIA capping program being executed under an NPDES Remedial Action 

Agreement, 3M has implemented a groundwater monitoring program to establish current 

conditions at the site and to provide adequate coverage for ongoing monitoring. The wells 
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sampled and a summary of the groundwater sulfonates analytical data are provided in Tables 3-8 

through 3-10 for PFBS, PFHS and PFOS, respectively. The well locations and the results from 

the March 2014 (i.e., first quarter 2014) sampling event are depicted in Figure 3-5. Analytical 

data packages for the on-site wells in the FSIA are provided in Interim Reports 07, 11, 18, 24, 28 

and 38 (Appendix A-1) and ISO13-05-02, ISO13-05-05, and ISO14-05-02 (Appendix A-2).

In accordance with the NPDES Remedial Action Agreement, pump tests were performed in the 

FSIA at monitoring wells 144PZE1 and MW145S in June and December 2012. During each 

pump test, groundwater samples were collected from monitoring well MW145S and two 

piezometers (144PZE1 and 144PZE2). The sulfonate analytical data are provided in Table 3-11 

and Figure 3-6. Additional detail on sampling activities was provided in the June 30, 2012 

Quarterly Status Report and the September 30, 2012 Quarterly Status Report (WESTON, 2012b; 

2012c). The analytical data packages from the FSIA pump tests are provided in Interim Report 

34 (Appendix A-1).

3.2.1.3 Wells and Pump Test in the Wastewater Treatment Plant

Six temporary monitoring wells (TW1R through TW6R) and one piezometer were installed 

throughout the WWTP area in March 2012 to obtain additional hydrogeologic and PFC 

analytical data under the NPDES Remedial Action Agreement with ADEM. The wells were 

sampled in April 2012, and a summary of the groundwater sulfonate analytical data is provided 

in Table 3-12 and Figure 3-7. Analytical data packages from the temporary monitoring wells in 

the WWTP are provided in Interim Report 31 (Appendix A-1). 

Three additional wells were installed in the WWTP area between June 11 and 14, 2012 (WW7R 

through WW9R). Pump testing was conducted in June 2012 at the new extraction wells, WW8R 

and WW9R. Groundwater samples were collected at the beginning, middle and end of the pump 

testing at these two wells, and these two wells were sampled on a monthly basis beginning in 

December 2012. Two additional extraction wells WW10R and WW11R were installed in June 

2013 with monthly monitoring beginning in September 2013. The four groundwater extraction 

wells WW8R through WW11R form part of the groundwater extraction network, and 

groundwater is effectively treated by granular activated carbon (GAC) at the on-site groundwater 

treatment plant (GWTP). A summary of the groundwater sulfonate analytical data is provided in 
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Table 3-13 and Figure 3-8, and additional detail was provided in the June 30, 2012 Quarterly 

Status Report (WESTON, 2012b), the September 30, 2012 Quarterly Status Report (WESTON, 

2012c) and the June 30, 2013 Quarterly Status Report (WESTON, 2013c). The analytical data 

package from the WWTP area pump test is provided in Interim Report 35 (Appendix A-1). 

Routine monthly extraction well monitoring analytical data packages are provided in the ISO 

Final Reports: ISO13-07-01, ISO13-07-02, ISO13-07-03, ISO13-07-04, ISO13-07-06, ISO13-

07-07 and ISO13-07-08 (Appendix A-2).

3.2.2 Phase 3 Off-Site Groundwater Summary

Based on review of data generated during the MOU Phase 2 assessment, additional groundwater 

data were deemed necessary for adequately characterizing off-site groundwater conditions (i.e., 

gradients) and the potential lateral extent of PFOA in the area around the 3M Decatur property. 

The MOU Phase 3 Work Plan included the installation of additional off-site monitoring wells in 

the vicinity of the 3M Decatur facility. 

In accordance with the MOU Phase 3 Work Plan, four groundwater monitoring well clusters 

(607, 609, 610 and 611) were installed at off-site locations to further delineate the presence of 

PFOA away from the 3M property and to refine groundwater gradients monitoring beyond those 

clusters established by the MOU Phase 2 monitoring well network. These Phase 3 monitoring 

well locations and the locations of the Phase 2 well clusters are provided in Figure 3-9. 

Discussions of the Phase 3 off-site well construction activities were provided in the September 

30, 2010 Quarterly Status Report (WESTON, 2010c), the December 31, 2010 Quarterly Status 

Report (WESTON, 2010d), and the September 30, 2011 Quarterly Status Report (WESTON, 

2011c). A summary of the well construction details for the Phase 3 monitor wells is provided in 

Table 3-14. Well cluster 607 was installed to the west of the 3M facility, well cluster 609 was 

installed to the south, and well clusters 610 and 611 were installed to the east. 

Two existing wells on the BP property (MW-47 and MW-121), were sampled in place of well 

cluster 606 initially proposed in the Phase 3 Work Plan. Existing monitoring wells (MW13S, 

MW13I and MW13B) on the Morgan County landfill site were selected and sampled to obtain 

information on the off-site groundwater elevations and quality in the area southwest of the 

facility. Using these existing monitoring wells eliminated the need for the installation of the 
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proposed well cluster 608. The use of the four installed Phase 3 well clusters and the two 

alternate locations to achieve the Phase 3 off-site groundwater monitoring objectives was 

described in the Technical Memorandum on Completion of the Phase 3 Off-Site Groundwater 

Monitoring Program (Technical Memorandum) (WESTON, 2012e) and discussed at a meeting 

with the EPA on September 20, 2012. Additional detail is contained in Subsection 3.2.3 and 

associated quarterly status reports.

In accordance with the MOU Phase 3 Work Plan, one round of groundwater sampling was 

performed in October and November 2010 following the initial installation of some of the Phase 

3 off-site groundwater monitoring wells. 3M voluntarily collected samples for sulfonate analysis 

from these off-site wells during the MOU Phase 3 groundwater sampling activities. A summary 

of the sampling results is provided in Tables 3-15 through 3-17 for PFBS, PFHS and PFOS, 

respectively. Analytical results from the final round of sampling in March and April 2012 are 

summarized in Figure 3-9. The Morgan County landfill wells were sampled in November 2010 

and April 2012, and the analytical results are summarized in Table 3-18 and Figure 3-10 (see 

Subsection 3.2.4.1 for additional discussion). Analytical data packages from the off-site 

sampling at the Morgan County landfill are provided in Interim Reports 13 and 29 (Appendix 

A-1).

Delays in obtaining access to properties for well construction and the ultimate inclusion of the 

BP wells (MW-47 and MW-121) into the off-site groundwater monitoring network resulted in 

the collection of the groundwater samples from the remaining MOU Phase 3 monitoring wells 

over an extended period. 3M performed a final sampling round at the off-site Phase 2 and 

Phase 3 monitoring wells as part of a single monitoring event to capture a complete 

contemporaneous data set. This re-sampling was performed in March and April 2012 as part of 

the regional groundwater sampling event and is discussed in the following subsection. Analytical 

data packages from the Phase 2 and Phase 3 off-site groundwater monitoring wells are provided 

in Interim Reports 10, 13, 19, 23 and 29 (Appendix A-1). 
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3.2.3 Regional Groundwater Sampling and Analysis and Conclusion of the 

Phase 3 Off-Site Groundwater Monitoring Program

To establish regional groundwater conditions and PFOA concentrations, a contemporaneous well 

sampling event was completed in April 2012 for the 3M Decatur property and regional 

monitoring locations. Well sets in the sampling program included the following: 

• On-site chemical plant and closed landfill wells (200 and 300 series wells). 

• On-site FSIA wells (100 series wells).

• Off-site regional wells (600 series wells).

• Selected BP facility wells.

• Selected Morgan County landfill wells (see also Subsection 3.2.4.1). 

• Browns Ferry Road Site (see also Subsection 3.2.4.3). 

The intent of the program was to gather sufficient data on groundwater elevation and PFOA 

concentrations within a short timeframe to be representative of groundwater conditions for the 

area in and around the 3M Decatur facility. 3M voluntarily collected samples for sulfonate 

analysis during the regional groundwater sampling event, and the analytical data are summarized 

in Section 3 tables and figures (see Tables 3-5 through 3-10, Tables 3-16 and 3-17 and Figures 3-

4, 3-5 and 3-9 through 3-12; in addition see Tables 3-18 through 3-20 and Figures 3-10 and 3-15 

through 3-17 for data on the Morgan County, BFI and BFR landfills, which are discussed in 

detail in Subsection 3.2.4). 

Findings from this sampling event were used to evaluate groundwater conditions in the vicinity 

of the 3M Decatur facility. Depth-to-groundwater measurements from monitoring wells in the 

series listed above were used to develop regional groundwater elevation data. Figures 3-13 and 

3-14 depict the residuum and bedrock groundwater elevations observed, respectively. The 

findings from the regional groundwater sampling were discussed in the Technical Memorandum 

(WESTON, 2012e) that was submitted to the EPA prior to a meeting between 3M, WESTON 

and the EPA on September 20, 2012. The Technical Memorandum provided a summary of the 

PFOA analytical results from the regional groundwater sampling, a description of the rationale 

for installation of the Phase 3 off-site monitoring wells and an analysis of groundwater 
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conditions at and surrounding the 3M Decatur facility. Conclusions regarding regional 

groundwater conditions were presented in a Technical Memorandum and are incorporated into 

Section 4 of this report. During the September 2012 technical consultation, the EPA agreed with 

the findings presented in the Technical Memorandum and agreed that there was no need to install 

the 608 well cluster. 

3.2.4 Phase 3 Assessment of Off-Site Waste Disposal Facilities

In accordance with the MOU Phase 3 Work Plan, groundwater use surveys were performed 

within a 2-mile radius of the Morgan County landfill, the BFI Morris Farm landfill and the 

former Bert Jefferies landfill (hereafter referred to as the Browns Ferry Road Site (BFRS)). As 

documented in the January 2008 DAR, wastes potentially containing PFOA from the 3M 

Decatur facility may have been disposed at these three disposal facilities. Their locations with 

respect to the 3M Decatur facility are shown in Figure 3-15. 

As part of the Phase 3 assessment, characterization activities were performed at each of the sites. 

Specific tasks included the following: 

• Completion of reconnaissance and file review within a 2-mile radius of each facility 

to identify land use and the availability of municipal water.

• Review of landfill records and operational practices to establish site groundwater 

conditions and development of a monitoring program for PFOA. 

• Conducting limited groundwater sampling at each of the three landfill sites to 

characterize the presence of PFOA in groundwater and to confirm local groundwater 

gradient patterns.

3M voluntarily collected samples for analysis of sulfonates in addition to the PFOA sampling 

activities at these off-site waste disposal facilities. The following subsections provide the results 

of this effort.

3.2.4.1 Morgan County Landfill 

The Morgan County/City of Decatur landfill is located approximately 2 miles west of the 3M 

property along U.S. Highway 20 (see Figure 3-15). The facility was identified during the MOU 

Phase 2 assessment as the primary off-site facility used by 3M for disposal of solid waste. The 
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Morgan County/City of Decatur landfill is located approximately 2 miles west of the 3M 

property along U.S. Highway 20 (see Figure 3-15). The facility was identified during the MOU 

Phase 2 assessment as the primary off-site facility used by 3M for disposal of certain solid 

wastes. From approximately 1960 until 1973, 3M sent wastes such as ordinary solid waste (i.e., 

paper and plastic items), out-of-specification polyester film, film trimmings, polyester pellets and 

wood pallets to the landfill for disposal. In addition, Site records indicate that from 1973 to 1978 

and from 1998 to present, 3M sent/sends sludge residues from the 3M WWTP to the landfill for 

disposal. 

Groundwater Use Survey 

The Phase 2 water use survey of the area within a 5-mile radius of the 3M Decatur facility 

conducted in 2007 identified 14 properties in the vicinity of the Morgan County landfill 

potentially using groundwater as a water source. Based on the Phase 3 groundwater use survey 

in the area of Morgan County landfill conducted in 2013, five of the previously identified 14 

properties occur within 2 miles of the landfill facility.

Four of the five properties are located approximately 2 miles west of the landfill along County 

Road 433. Reconnaissance of the properties indicates that they rely on private wells for potable 

water. Public water is unavailable to this area. Groundwater flow directions in the vicinity of the 

Morgan County landfill were established based upon a review of documents related to the site 

that were obtained from an ADEM file search. Based on an established groundwater flow 

direction at Morgan County landfill to the north/northeast and the relative position of the 

residences crossgradient (west) of the landfill, the potential to impact the wells on the properties 

by the landfill is highly unlikely. This premise is further supported by the presence of several 

surface water drainage features associated with Fox Creek occurring between the Morgan 

County landfill and the residences to the west that would likely serve as a hydraulic barrier for 

groundwater flow.

The fifth property occurs approximately 1.75 miles southeast of Morgan County landfill along 

North Greenway Drive. Two houses are located on this property. One meter box was observed 

on the site suggesting that one or both houses receive potable municipal water. There was no 
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indication of private wells on the site. Based on the regional groundwater gradient and the 

groundwater data for Morgan County Landfill, groundwater flow at the landfill is from the 

south-east to the northeast. Thus, the landfill is 1.75 miles downgradient from the North 

Greenway Drive property. Therefore it is highly unlikely that groundwater from the landfill has 

any impact on the groundwater at the North Greenway Drive property. 

Groundwater Monitoring 

A groundwater sampling program was developed to assess conditions in and around the Morgan 

County landfill using 14 existing groundwater monitoring wells identified on-site. Sampling was 

conducted on November 2010 (14 wells) and in April 2012 (three wells). A summary of the 

groundwater analytical results is provided in Table 3-18 and Figure 3-10. Additional information 

on sampling activities was provided in the December 31, 2010 Quarterly Status Report

(WESTON, 2010d) and the June 30, 2012 Quarterly Status Report (WESTON, 2012b). 

Analytical data packages from the groundwater sampling at the Morgan County landfill are 

provided in Interim Reports 13 and 29 (Appendix A-1).

3.2.4.2 BFI Morris Farm Landfill

The BFI Morris Farm landfill is located in a rural area of Lawrence County off County Road 

418, approximately 4 miles west of the junction of Mallard Creek and the Tennessee River (see 

Figure 3-15). Sludge from the 3M Decatur WWTP has been sent to the BFI landfill for disposal.

Groundwater Use Survey 

The Phase 3 groundwater use survey performed within a 2-mile radius of the BFI Morris Farm 

landfill identified 30 residential properties. Of the 30 residences, two properties are believed to 

use private wells for potable water. One of the properties is located approximately 1.5 miles west 

to northwest of the BFI Morris Farm landfill. Based on file review and elevation measurements 

during sampling, groundwater data from the landfill indicate a groundwater flow gradient east to 

southeast toward a tributary to Dry Creek. As a result, the residential property is considered 

upgradient to the landfill with a low potential for groundwater impact from landfill activities. 

Groundwater flow directions in the vicinity of the BFI Morris Farm Landfill were established 

based upon a review of documents related to the site that were obtained from an ADEM file 
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search. The second property is located approximately 2 miles southwest of the BFI Morris Farm 

landfill along County Road 420. Based on the documented groundwater flow gradient at the 

landfill east to southeast and the relative positioning of the two properties, it is expected that the 

residential property is upgradient to the landfill with a low potential for impact by landfill 

activities. Additionally, review of local topography indicates that the residence is situated on the 

west side of a topographic divide separating the property from the landfill. It is likely that this 

divide also reflects a line of divergent groundwater flow that would serve as a hydraulic barrier 

between the two locations.

Groundwater Monitoring 

Groundwater sampling was performed at seven existing monitoring wells at the BFI Morris Farm 

landfill in March 2011. A summary of the groundwater analytical results is provided in Table 

3-19 and Figure 3-16. Additional information on the sampling activity was included in the June 

30, 2011 Quarterly Status Report (WESTON, 2011b). The analytical data package from the 

groundwater sampling at the BFI Morris Farm Landfill is provided in Amended Interim Report 

14 (Appendix A-1).

3.2.4.3 Browns Ferry Road Site

The Browns Ferry Road Site (BFRS) is located in northern Lawrence County along County Road 

386, approximately 1 mile south of Mallard Creek (see Figure 3-15). The landfill was 

constructed by Bert Jefferies Construction Company, which entered into an agreement with 3M 

in 1977 to haul waste, including scrap rolls of film, drums of solid plastic and broken pallets. 3M 

disposal stopped in 1983 when the landfill ceased operations. The BFRS was purchased by 3M 

in 2011. 
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Groundwater Use Survey 

The Phase 3 groundwater use survey conducted in the area of BFRS identified 11 residences 

(including one that is abandoned) within a 2-mile radius of the BFRS that potentially rely on 

private wells for potable water. Of the 11 properties, 8 are located north of Dry Creek at the cove 

formed by the Mallard Creek confluence with the Tennessee River approximately 1.2 miles 

northwest of the BFRS. Reconnaissance indicates that a public water supply is not available to 

the properties. Although groundwater from the BFRS has been shown to flow north/northeast, it 

is likely that Dry Creek (located between the properties and the BFRS) serves as a hydraulic 

barrier preventing continued northerly flow of groundwater beyond the creek basin. 

Consequently, the potential for impact to groundwater at these residential properties by BFRS is 

considered low. 

One residential property is located approximately 1⁄4 mile northwest of the BFRS. Groundwater 

data for the BFRS indicate the gradient flow for residuum and bedrock groundwater is northeast, 

presumably turning north toward Dry Creek. Local topography would suggest that groundwater 

at the residential site also flows to the northeast, resulting in a relative positioning of the 

residential property crossgradient from the BFRS with a low potential for impact by groundwater 

from the BFRS. Groundwater flows in the vicinity of the BFRS were established based upon 

groundwater level measurements taken at the site.

The remaining two properties are located approximately 2 miles southeast of the BFRS. Based 

on the groundwater data for the BFRS and the local topography, these properties are presumed to 

be upgradient to crossgradient of the BFRS with a low potential for groundwater influence from 

the BFRS.

Groundwater Monitoring 

In 2011, following 3M’s purchase of the property and, as specified in the Phase 3 Work Plan, a 

groundwater sampling program was initiated at the site. During the initial reconnaissance of the 

property, seven existing wells were identified, including one well that was damaged and 

unusable and one possible water supply well that was deemed unsuitable for monitoring. The 

remaining five wells were monitoring wells that were determined to be suitable for groundwater 
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sampling. In February 2012, an additional nine monitoring wells were installed at the BFRS, as 

described in the March 31, 2012 Quarterly Status Report (WESTON, 2012a). 

Groundwater sampling of 14 monitoring wells was conducted in April 2012, October 2012 and 

August 2013. A summary of the analytical data is provided in Table 3-20 and the most recent 

data set (August 2013) is presented on Figure 3-17. Additional information on sampling activity 

was included in the June 30, 2012 Quarterly Status Report (WESTON, 2012b), the December 

31, 2012 Quarterly Status Report (WESTON, 2012d) and the September 30, 2013 Quarterly 

Status Report (WESTON, 2013d). Analytical data packages from groundwater sampling at the 

BFRS are provided in Interim Reports 30 and 37 (Appendix A-1) and ISO13-05-03 Final Report 

(Appendix A-2).

3.3 FISH SAMPLING

Since 2000, 3M has assessed PFC levels in fish and surface water in the Tennessee River with 

the involvement and approval of ADEM. 

In April 2012, fish sampling was performed at three adjoining reaches, spanning a distance of 2.5 

miles in the Tennessee River in the immediate vicinity of the 3M Decatur facility, to characterize 

concentrations of PFOS in skin-off filet samples from largemouth bass (Micropterus salmoides). 

A total of 26 largemouth bass were collected between the three sampling reaches with 10 fish 

each from the upper reach above the mouth of Bakers Creek and the middle reach at the mouth 

of Bakers Creek and six fish from the lower reach below the mouth of Bakers Creek. Fish filet 

tissue PFOS concentrations are summarized in Table 3-21 and shown in Figure 3-18. In addition 

to collecting fish samples, surface water samples were collected from each fish sampling reach 

for PFOS analysis. Surface water PFOS concentrations are summarized in Table 3-22 and shown 

in Figure 3-19. Additional details on the spring 2012 fish tissue sampling event are provided in 

the report titled, Fish Sampling and Analysis for PFOS in Largemouth Bass from the Tennessee 

River in the Vicinity of the 3M Decatur Facility (WESTON, 2012f; Appendix B). The analytical 

data from the spring 2012 fish tissue and surface water sampling are provided in the ISO12-01-

01-01 and ISO12-01-01-02 Final Reports. (Appendix A-2). Appendix A-3 includes the analytical 

data package produced by AXYS Analytical laboratories, a third-party laboratory at which split 

samples were analyzed.
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In fall 2012, the most comprehensive fish PFC data set developed to date in the study area was 

collected. This sampling was performed to characterize the current concentrations of PFOS in 

filet samples from largemouth bass (Micropterus salmoides) and channel catfish (Ictalurus 

punctatus). In addition, several other PFCs, including PFBS and PFHS, which are subject to 

monitoring in the 3M Decatur facility’s NPDES permits issued by ADEM, were included as 

target analytes (WESTON, 2012). 

Fish tissue samples (filets) were collected at 13 reaches in the Wheeler Reservoir and two reaches 

in the Wilson Reservoir of the Tennessee River over an approximately 56-river mile (RM) portion 

of the Tennessee River from RM 320 near Triana, Alabama, downstream to RM 264 above 

Florence, Alabama. Ten fish specimens, consisting of five largemouth bass and five channel 

catfish, were collected from each of the 15 sampling reaches, and skin-off filet samples were 

prepared. Excluding duplicates, a total of 150 fish samples were collected for analysis. A summary 

of the sulfonate analytical results for fish is provided in Table 3-23. Additionally, sample reach 

locations and analytical results are shown in Figures 3-20 through 3-22, for PFBS, PFHS and 

PFOS, respectively. Additional details on the fall 2012 fish tissue sampling event were provided in 

the Tennessee River Perfluorochemical (PFC) Assessment Fish Tissue and Surface Water 

Sampling Report, October-December 2012 (WESTON, 2013e; Appendix C) and the March 31, 

2013 Quarterly Status Report (WESTON, 2013b). The analytical data from fish tissue sampling 

are provided in the ISO12-01-01-04 Final Report (Appendix A-2). Appendix A-3 includes the 

analytical data package produced by AXYS Analytical laboratories, a third-party laboratory at 

which split samples were analyzed.

3.4 SUPPLEMENTAL SURFACE WATER SAMPLING

Surface water sampling was performed in the Tennessee River in fall 2012 in conjunction with the 

fish sampling described above. Three surface water samples were collected from each of the 15 

fish sampling reaches, for a total of 45 primary samples, to develop co-located data on PFC 

concentrations in fish filet and surface water media. Surface water sampling at the fish sampling 

reaches occurred between November 16 and 20, 2012.

Following the surface water sampling at the fish sampling locations, additional surface water 

samples were collected throughout the same stretch of the Tennessee River at nine surface water 
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transects extending across the width of the Tennessee River. Ten surface water samples were 

collected from evenly spaced locations along each of the nine transects between December 3 and 5, 

2012. Transect sampling across the Tennessee River was performed to develop data on potential 

sources of PFCs to the river and mixing characteristics within the study area. Additional details on 

the fall 2012 surface water sampling were included in the Tennessee River Perfluorochemical 

(PFC) Assessment Fish Tissue and Surface Water Sampling Report, October-December 2012

(WESTON, 2013e, Appendix B) and the March 31, 2013 Quarterly Status Report (WESTON, 

2013b). 

Excluding duplicates, a total of 135 surface water samples were collected for analysis. A summary 

of the sulfonate analytical results for surface water samples from the sampling fish reaches and 

transect sampling locations is provided in Tables 3-24 and 3-25, respectively. Sampling locations 

and analytical results for the fish sampling reach surface water and transect surface water sampling 

are shown in Figures 3-23 and 3-24, respectively. Analytical data packages from Tennessee River 

surface water sampling are provided in the ISO12-01-01-03 Final Report and E12-0849 Revised 

Final Report (Appendix A-2). Appendix A-3 includes the analytical data package produced by 

AXYS Analytical laboratories, a third-party laboratory at which split samples were analyzed. 

3.5 CHARACTERIZATION ACTIVITIES IN SUPPORT OF ON-SITE REMEDIAL 

DESIGN AND OFF-SITE ENVIRONMENTAL ASSESSMENT

3.5.1 Avenue A Drainageway

The evaluation of Phase 2 data for the Avenue A drainageway indicated the presence of PFOA 

and sulfonates in surface water and sediment. As part of 3M’s commitment to ADEM, a program 

was initiated to identify and reduce the PFOA sources and discharges at the Decatur facility. Under 

the NPDES Remedial Action Agreement, 3M further assessed the Avenue A drainageway to 

identify the potential sources to the Avenue A drainageway and Bakers Creek at the mouth of the 

Tennessee River. 

3M initiated assessment activities in the upgradient areas to the Avenue A drainageway from 

June 22 through July 9, 2010 to identify the potential sources for PFOA and sulfonates. Twelve 

temporary monitoring wells were installed. In addition, surface water, sediment, soil and 

groundwater samples were collected from the Avenue A drainageway, ancillary tributaries and 
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surrounding upland areas. Summaries of the sulfonate data are provided in Table 3-26 and 

Figures 3-25 and 3-26. Potential sources of PFCs associated with the fire training area (FTA), a 

drainage feature north of the closed landfill and a marsh located west of the closed landfill were 

identified. A summary of the work performed in these areas is provided in the September 30, 

2010 Quarterly Status Report (WESTON, 2010c). Analytical data packages from the Avenue A 

sampling in June 2010 are provided in Interim Reports 05 and 06 (Appendix A-1).

Following the completion of the initial assessment activities in the Avenue A drainageway and 

associated areas, additional assessment activities were conducted at potential source areas in 

January 2011. Groundwater sampling was performed on January 27, 2011 at two of the 

temporary wells and at one permanent well (210R) in the Avenue A drainageway area. A 

summary of the work performed was provided in the March 31, 2011 Quarterly Status Report 

(WESTON, 2011a). A summary of the analytical data is provided in Table 3-27 and Figure 3-27. 

The analytical data package from the Avenue A groundwater sampling in January 2011 is 

provided in Interim Report 16 (Appendix A-1).

Soil and sediment sampling was performed at 26 locations within the Avenue A drainageway 

and associated areas in January 2011. A summary of the work was provided in the March 31, 

2011 Quarterly Status Report (WESTON, 2011a). A summary of the analytical data is provided 

in Table 3-28 and Figure 3-28. Analytical data from the Avenue A soil and sediment sampling in 

January 2011 is provided in Interim Report 15 (Appendix A-1).

3.5.2 On-Site Soil Sampling Adjacent to FSIA Field 6

In December 2012, soil borings were conducted at three locations in an area to the east of FSIA 

Field 6 to determine whether any surficial controls (i.e., cover or capping) should be considered 

for this area. Soil samples were collected from the 0- to 0.5-foot and 5- to 5.5-foot depth 

intervals from each of the soil borings. A summary of the analytical data is provided in Table 3-

29 and Figure 3-29. The analytical data package from the sampling adjacent to FSIA Field 6 is 

provided in the ISOE12-0849 (Appendix A-2).
J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014

3-18

3.5.3 Browns Ferry Road Site

In addition to the groundwater samples collected at the BFRS and described in Subsection 

3.2.5.3, 3M conducted additional assessment activities to further characterize site conditions. 

Surface water and sediment sampling was conducted in February 2012 and October 2012. 

In February 2012, surface water and sediment sampling was conducted at four sample locations, 

ET-01 through ET-04 (see Figures 3-30 and 3-31). As a confirmatory measure, additional 

surface water samples were collected in October 2012 from on-site locations (ET-02 and ET-04; 

ET-01 was dry at the time of sampling), from off-site locations downgradient of the site (ET-05 

and WT-01) and at a location in Dry Creek downstream of the BFI Morris Farm landfill facility 

(DC-01). Details of the sampling activities were provided in the March 31, 2012 Quarterly 

Status Report (WESTON, 2012a), the June 30, 2012 Quarterly Status Report (WESTON, 2012b) 

and the December 31, 2012 Quarterly Status Report (WESTON, 2012d). 

A summary of the analytical data is provided in Tables 3-30 and 3-31 and Figures 3-30 and 3-31. 

Analytical data packages from the BFRS soil and sediment sampling are provided in Interim 

Reports 25 and 26 (Appendix A-1).
J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014

SECTION 3

FIGURES
&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

DAL-DF11-SS-SS07

DAL-DF11-SS-SS06

DAL-DF11-SS-SS05

DAL-DF8C-SS-SS05

DAL-DF8C-SS-SS04

DAL-DF8C-SS-SS03

DAL-DF8C-SS-SS02

DAL-DF8C-SS-SS01

DAL-DF05-SS-SS10

DAL-DF05-SS-SS09

DAL-DF05-SS-SS08

DAL-DF05-SS-SS07

DAL-DF05-SS-SS06

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

DAL-DF11-SS-SS07

DAL-DF11-SS-SS06

DAL-DF11-SS-SS05

DAL-DF8C-SS-SS05

DAL-DF8C-SS-SS04

DAL-DF8C-SS-SS03

DAL-DF8C-SS-SS02

DAL-DF8C-SS-SS01

DAL-DF05-SS-SS10

DAL-DF05-SS-SS09

DAL-DF05-SS-SS08

DAL-DF05-SS-SS07

DAL-DF05-SS-SS06

Legend:

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\concentrations_onsite_MarApril2010.mxd, 12/9/2013 8:19:39 AM, ricksc

&< Soil sampling locations

Field boundaries are conceptual 

and indistinct. Sample designations

based on soil characteristics.

Highway 20/72

Field 14

Field 8b

Field 8a

Field 11

Field 5

Former Nebo Road

Notes:

-PFBS, PFHS and PFOS concentrations represent the

 average of primary and duplicate analytical results in

 ng/g (ppb, dry weight)

-Sample depth in feet below ground surface (ft bgs)

Figure 3-1

PFBS, PFHS and PFOS Concentrations

in On-Site Former Sludge

Incorporation Area Soils

March 2010

Field 8C

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 0.187 0.161 35.8

1.0 - 1.5 ND (ND) ND (ND) 48.4 (42.1) DF05-SS06

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 ND 0.357 49.4

1.0 - 1.5 ND 0.467 4.74 DF05-SS07

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 ND 0.156 101

1.0 - 1.5 ND ND 59.8 DF05-SS08

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 ND 0.283 410

1.0 - 1.5 ND 0.164 88.4 DF05-SS09

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 ND 2.16 1080

1.0 - 1.5 ND 1.27 237 DF05-SS10

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 0.156 0.681 159

1.0 - 1.5 0.222 1.39 356 DF8c-SS01

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 ND 0.563 121

1.0 - 1.5 ND 0.345 91.8 DF8c-SS02

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 2.17 11.2 874

1.0 - 1.5 1.33 (1.38) 10.4 (10.5) 1550 (1530) DF8c-SS03

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 ND 0.290 242

1.0 - 1.5 ND 0.333 302 DF8c-SS04

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 0.198 1.48 276

1.0 - 1.5 6.62 27.1 508 DF8c-SS05

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 0.919 10.0 1500

1.0 - 1.5 0.227 (0.185) 3.21 (2.98) 1140 (1360) DF11-SS05

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 0.326 4.62 1050

1.0 - 1.5 0.139 2.01 659 DF11-SS06

Sample ID Depth PFBS PFHS PFOS

0.0 - 0.5 4.26 86.8 18900

1.0 - 1.5 ND 1.95 4960 DF11-SS07

μ 350 175 0 Feet
#* #* #*

#*

#*

#*

#*

#*

#*

#*

#*

#*

#* #* #*

#*

#* #*

#* #*

#*

#*

#*

#*

#*

WEEC Pond

WEEC Swamp

Finley Island Road

FSIA

Field 10

WEU10

WEU09

WEU08

WEU07 WEU06

WEU05

WEU04

WEU03

WEU02

WEU01

WESD3

WESD1

WESC4

WESC3

WESC2

WESB5

WESB4

WESB3

WESB2

WESA1

WESD2

WESC1

WESB1

WESA3

WESA2

FSIA

Field 9

WEEC

#* #* #*

#*

#*

#*

#*

#*

#*

#*

#*

#*

#* #* #*

#*

#* #*

#* #*

#*

#*

#*

#*

#*

WEEC Pond

WEEC Swamp

Finley Island Road

FSIA

Field 10

WEU10

WEU09

WEU08

WEU07 WEU06

WEU05

WEU04

WEU03

WEU02

WEU01

WESD3

WESD1

WESC4

WESC3

WESC2

WESB5

WESB4

WESB3

WESB2

WESA1

WESD2

WESC1

WESB1

WESA3

WESA2

FSIA

Field 9

WEEC

Figure 3-2

Wetlands Edge Environmental Center

Average Sediment and Soil 

PFBS, PFHS and PFOS

Concentrations

June 2010

450 225 0 Feet

Legend:

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\WEEC_results.mxd, 12/9/2013 8:21:51 AM, ricksc

Imagery Source:

ESRI, i-cubed, USDA FSA, USGS, AEX, 

GeoEye, Getmapping, Aerogrid, IGP. 2010

#* Sediment and soil sampling locations

Sediment sample from WEEC swamp

Upland soil sample adjacent to WEEC swamp

WES

WEU

Notes:

-PFBS, PFHS and PFOS concentrations represent the

 average of primary and duplicate analytical results in

 ng/g (ppb, dry weight)

-Field duplicate results listed below primary field samples.

μ

Sample ID PFBS PFHS PFOS

WESA1 0.471 3.99 605

Sample ID PFBS PFHS PFOS

WESA2 0.569 3.50 537

Sample ID PFBS PFHS PFOS

WESA3 0.471 3.53 535

Sample ID PFBS PFHS PFOS

WESB1 0.480 2.34 189

Sample ID PFBS PFHS PFOS

WESB2 0.391 3.24 377

Sample ID PFBS PFHS PFOS

WESB3 0.391 2.96 391

Sample ID PFBS PFHS PFOS

WESB4 0.374 3.21 502

WESB4 (DUP) 0.400 3.11 471

Sample ID PFBS PFHS PFOS

WESB5 0.509 5.30 616

Sample ID PFBS PFHS PFOS

WESC1 ND 3.62 682

Sample ID PFBS PFHS PFOS

WESC2 0.294 3.32 573

Sample ID PFBS PFHS PFOS

WESC3 0.239 3.29 774

Sample ID PFBS PFHS PFOS

WESC4 0.233 1.81 292

Sample ID PFBS PFHS PFOS

WESD1 0.174 0.932 131

Sample ID PFBS PFHS PFOS

WESD2 0.379 1.92 336

WESD2 (DUP) 0.365 1.88 363

Sample ID PFBS PFHS PFOS

WESD3 0.639 4.01 584

Sample ID PFBS PFHS PFOS

WEU01 0.928 1.62 126

Sample ID PFBS PFHS PFOS

WEU02 ND 0.587 116

Sample ID PFBS PFHS PFOS

WEU03 0.858 2.34 223

Sample ID PFBS PFHS PFOS

WEU04 0.789 1.82 248

Sample ID PFBS PFHS PFOS

WEU05 1.30 4.62 775

Sample ID PFBS PFHS PFOS

WEU06 0.249 1.52 543

Sample ID PFBS PFHS PFOS

WEU07 0.690 3.04 479

Sample ID PFBS PFHS PFOS

WEU08 1.26 1.77 128

Sample ID PFBS PFHS PFOS

WEU09 0.740 1.45 198

WEU09 (DUP) 0.787 1.56 203

Sample ID PFBS PFHS PFOS

WEU10 0.379 0.400 57.0
!.

!.

!.

!.

!.

!.

609-R

607-L

611-L

MW-47

610

MW-121

!.

!.

!.

!.

!.

!.

609-R

607-L

611-L

MW-47

610

MW-121

Figure 3-3

Phase 3 Off-Site Monitoring Well

Soil Boring

Average PFBS, PFHS and PFOS 

Concentrations

September/October 2010 - August 2011 μ

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\Offsite_MW_SB.mxd, 8/22/2014 7:55:37 AM, ricksc

Legend

!. Monitoring Well Locations

Facility Boundary

Highway 20/72

Finley Island Rd

Red Hat Rd

Tennessee River

0 1,250 2,500 Feet

Notes:

-PFBS, PFHS and PFOS concentrations represent the

 average of primary and duplicate analytical results in

 ng/g (ppb, dry weight)

-Sample IDs beginning with DAL-GW-607R were

 collected from well 607S.

-DUP - Duplicate Sample

Depth PFBS PFHS PFOS

0 - 0.5 0.239 < 0.200 10.2

MW47

Depth PFBS PFHS PFOS

0 - 0.5 0.343 < 0.200 10.1

MW121

Depth PFBS PFHS PFOS

 0 - 1 0.480 < 0.200 14.7

1 - 2 < 0.500 < 0.200 20.0

1 - 2 (DUP) < 0.500 < 0.200 23.0

4 - 5 < 0.500 < 0.200 4.61

27 - 28 < 0.500 < 0.200 < 0.200

607R

Depth PFBS PFHS PFOS

0 - 1 0.517 0.195 24.0

1 - 2 < 0.500 < 0.200 9.08

4 - 5 < 0.500 < 0.200 1.07

11 - 12 < 0.500 < 0.200 < 0.200

609R

Depth PFBS PFHS PFOS

0 - 1 0.991 0.586 36.1

1 - 2 0.439 0.690 19.5

4 - 5 0.572 1.11 3.00

15 - 17 < 0.200 < 0.200 < 0.200

610S

Depth PFBS PFHS PFOS

0 - 1 0.417 < 0.200 21.8

1 - 2 0.548 0.658 14.6

4 - 5 < 0.500 < 0.200 4.67

 5 - 6 < 0.500 < 0.200 2.73

611R

Imagery: ESRI Bing Mapping Service
331S

227R

222R

220L

203L

330R

327R

312R

310R

328L

324L

317L

Tennessee River/

Wheeler Reservoir

Chemical 

Plant

Closed

Landfill

335S

WW8R

WW9R

Avenue A

State Docks Road

331S

227R

222R

220L

203L

330R

327R

312R

310R

328L

324L

317L

Tennessee River/

Wheeler Reservoir

Chemical 

Plant

Closed

Landfill

335S

WW8R

WW9R

Avenue A

State Docks Road

Figure 3-4

On-Site Chemical Plant and 

Closed Landfill Area

Groundwater PFBS, PFHS and 

PFOS Concentrations

October 2013

450 225 0 Feet

Legend:

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\Chemicalplant_closedlandfill_October2013.mxd, 12/18/2013 12:03:38 PM, johna

Groundwater sampling locations

Notes:

-PFBS, PFHS and PFOS concentrations represent the

 average of primary and duplicate analytical results in

 ng/mL (ppb).

-GRS04 is a composite sample from multiple extraction wells.

R - Residuum Well

S - Epikarst Well

L - Bedrock Well

PFBS PFHS PFOS

<0.0250 0.0986 0.243

317L

PFBS PFHS PFOS

1310 307 767

310R

PFBS PFHS PFOS

1440 163 682

PFBS PFHS PFOS

1340 459 179

330R

330L

PFBS PFHS PFOS

430 161 461

RW331S

PFBS PFHS PFOS

1240 1660 6480

335R

PFBS PFHS PFOS

7260 1300 2860

RW312R

PFBS PFHS PFOS

72.2 54.3 77.9

324L

PFBS PFHS PFOS

61.9 164 663

RW327R

PFBS PFHS PFOS

33.2 51.7 270

PFBS PFHS PFOS

45.3 16.9 1.24

328R

328L

PFBS PFHS PFOS

15.1 57.1 657

PFBS PFHS PFOS

259 82.5 832

227R

227L

PFBS PFHS PFOS

8.12 40.3 78.9

PFBS PFHS PFOS

4.96 17.3 49.6

220R

220L

PFBS PFHS PFOS

45.5 308 459

222R

PFBS PFHS PFOS

23.7 147 791

203L 

PFBS PFHS PFOS

2780 9340 2820

GRSO4
!.

!.!.!.

!.!.!.

!.!.!.

!.!.!.

!.!.

!.!.!.

!!.!.

!.

!.

!.

!. !.

!.

Field 12

Field 13

Finley Island Road

Field 9

State Docks Road

Field 10

Field 11

Field 5

Nebo Road

Highway 20/72

Field 14

Field 8c

50 0- g al N o . 2 

Fu el O il A ST

21 7D

21 7R

21 7S

CW26C

Norfolk Southern Railroad

Field 8b

138-R

134S

136S

130S

133L

131R

137S

135-R

141R

145R

142R

143R

140R

!.

!.!.!.

!.!.!.

!.!.!.

!.!.!.

!.!.

!.!.!.

!!.!.

!.

!.

!.

!. !.

!.

Field 12

Field 13

Finley Island Road

Field 9

State Docks Road

Field 10

Field 11

Field 5

Nebo Road

Highway 20/72

Field 14

Field 8c

50 0- g al N o . 2 

Fu el O il A ST

21 7D

21 7R

21 7S

CW26C

Norfolk Southern Railroad

Field 8b

138-R

134S

136S

130S

133L

131R

137S

135-R

141R

145R

142R

143R

140R

Figure 3-5

On-Site Former Sludge Incorporation 

Area Groundwater PFBS, PFHS and 

PFOS Concentrations

March 2014

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\FSIAGW_gw_March2014.mxd, 8/22/2014 7:47:24 AM, ricksc

Notes:

-PFBS, PFHS and PFOS concentrations represent the

 average of primary and duplicate analytical results in

 ng/mL (ppb).

-NS [D] = Not Sampled. Well dry.

Legend:

Groundwater 

Sampling Location !.

Daikin Property

Note:

R - Residuum Well

S - Epikarst Well

L - Bedrock Well μ 800 400 Feet 0

Well ID PFBS PFHS PFOS

130R 16.8 120 514

130S 4.32 34.9 148

130L 1.58 10.7 67.9

Well ID PFBS PFHS PFOS

131R 68.2 370 1150

131S 0.996 6.08 6.83

131L 2.98 21.6 45.7

Well ID PFBS PFHS PFOS

133R 2.28 15.5 25.4

133S 10.3 73.4 319

133L 9.53 72.7 514

Well ID PFBS PFHS PFOS

134R 52.1 520 1450

134S 0.496 6.10 23.9

134L 9.89 92.7 501

Well ID PFBS PFHS PFOS

135R 65.1 734 1470

135S 2.26 26.1 24.1

135L 11.9 78.5 92.6

Well ID PFBS PFHS PFOS

136R NS[D] NS[D] NS[D]

136S 3.31 20.2 127

136L 2.44 16.5 94.7

Well ID PFBS PFHS PFOS

137R NS[D] NS[D] NS[D]

137S 0.188 0.265 0.703

137L 0.105 0.114 1.69

Well ID PFBS PFHS PFOS

138R 8.68 37.7 369

138S 5.83 26.3 305

138L 0.0324 0.0690 0.362

Well ID PFBS PFHS PFOS

140R 1.47 15.0 129

Well ID PFBS PFHS PFOS

141R 0.0720 0.394 6.79

Well ID PFBS PFHS PFOS

142R 2.63 14.4 206

Well ID PFBS PFHS PFOS

143R 1.39 5.01 24.8

Well ID PFBS PFHS PFOS

145S 0.811 3.99 91.0

Well ID PFBS PFHS PFOS

CW26C 7.64 57.9 436

CW26L 15.8 122 1550
&<

&<

Field 8a

Field 7

Field 8a Field 4

Field 8b

Field 11

Field 5

Nebo Road

ay 20/72

Field 8c

144E

145S

&<

&<

Field 8a

Field 7

Field 8a Field 4

Field 8b

Field 11

Field 5

Nebo Road

ay 20/72

Field 8c

144E

145S

Figure 3-6

Groundwater Average

PFBS, PFHS and PFOS Concentrations

On-Site Former Sludge

Incorporation Area Pump Test μ June 2012 and December 2012

450 225 0 Feet

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\Onsite_Pump_Test_gw_June2012_Dec2012.mxd, 8/22/2014 7:32:29 AM, ricksc

Imagery: ESRI Bing Mapping Service

Notes:

Sulfonate concentrations are the averages of primary 

 and duplicate samples in ng/mL (ppb).

At 145S, samples collected at the beginning,

 middle and end of pump testing.

At 144PZE, samples were collected at the beginning

 and end of pump testing.

Legend

&< Groundwater Sampling Locations

Well ID Date PFBS PFHS PFOS

144PZE1 6/3/2012 2.76 13.1 150

144PZE2 6/3/2012 3.62 17.0 179

Well ID Date PFBS PFHS PFOS

145S 6/4/2012 1.90 8.22 63.9

145S 6/5/2012 1.28 5.79 55.1

145S 6/6/2012 1.23 5.69 57.6

145S 12/4/2012 1.59 7.43 118
Figure 3-7

Wastewater Treatment Plant Area

Groundwater Average

PFBS, PFHS and PFOS Concentrations

April 2012

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\WWTP_locs_.mxd, 10/9/2013 2:48:15 PM, ricksc

μ

225 112.5 Feet 0

Legend

&< Existing Monitoring Wells

&< Temporary Monitoring Well (TW)

A! Temporary Piezometer Well (PZ)

Imagery Source: ESRI, Bing Mapping Service

Former Location of

Sludge Ponds - Closed

4th Quarter, 2011

Note:

-Sulfonate concentrations are the averages of primary

and duplicate sample analytical results in ng/mL (ppb).

Tennessee River/

Wheeler Reservoir

Well ID PFBS PFHS PFOS

TW6R 156 46.7 281

Well ID PFBS PFHS PFOS

TW5R 522 43.0 696

Well ID PFBS PFHS PFOS

TW4R 184 19.1 247

Well ID PFBS PFHS PFOS

TW3R 304 1310 3660

Well ID PFBS PFHS PFOS

TW2R 117 579 1090

Well ID PFBS PFHS PFOS

TW1R 33.8 57.3 29.0
&<

&<

&<

&<

WW9R

WW8R

WW10R

WW11R

Tennessee River/

Wheller Reservoir

&<

&<

&<

&<

WW9R

WW8R

WW10R

WW11R

Tennessee River/

Wheller Reservoir

Figure 3-8

Groundwater Average

PFBS, PFHS and PFOS Concentrations

Wastewater Treatment Plant Area

Extraction Wells μ June 2012 - June 2014

300 150 Feet 0

File: Y:\3MDec\MXD\Sulfonate\2013\WWTP_June2012_June2014.mxd, 8/21/2014 7:00:57 PM, ricksc

Legend

&< Monitor Well Location

Decatur, AL

Imagery: ESRI Imagery Mapping Service

Note:

Sulfonate concentrations are the averages of primary 

and duplicate samples.

Date PFBS PFHS PFOS

9/30/2013 299 1000 2200

10/28/2013 240 511 1670

11/18/2013 287 680 1850

12/13/2013 198 512 1570

1/30/2014 168 362 1540

2/27/2014 262 696 2100

3/31/2014 254 549 1890

4/23/2014 212 527 1630

5/15/2014 237 649 1750

6/25/2014 250 760 2130

WW11R

Date PFBS PFHS PFOS

9/30/2013 247 1030 2770

10/28/2013 264 1030 3160

11/18/2013 303 1120 3890

12/13/2013 239 885 2920

1/30/2014 250 757 1570

2/27/2014 260 935 2860

3/31/2014 278 1030 3490

4/23/2014 243 885 2130

5/15/2014 220 823 2680

6/25/2014 240 948 2860

WW10R

Date PFBS PFHS PFOS

233 1290 2620

248 1340 2610

254 1330 2550

12/13/2012 321 1480 4080

1/17/2012 184 954 3690

2/13/2013 236 1400 4100

3/27/2013 278 1440 4660

4/29/2013 244 1200 4340

5/31/2013 226 1120 4210

6/27/2013 225 1140 4150

7/23/2013 212 1030 3670

9/30/2013 249 1220 4200

10/28/2013 286 1280 4380

11/18/2013 305 1340 4540

12/13/2013 259 1170 4190

1/30/2014 317 1460 4800

2/27/2014 270 1370 4660

3/31/2014 341 1550 5420

4/23/2014 257 1120 3820

5/15/2014 266 1140 4790

6/25/2014 274 1270 4470

WW9R

Pump Test 

(June 2012)

Date PFBS PFHS PFOS

575 2610 5280

489 2280 4550

453 2070 4170

12/13/2012 441 1740 4920

1/17/2012 410 1930 5710

2/13/2013 354 1900 4850

3/27/2013 385 1760 5120

4/29/2013 364 1610 4830

5/31/2013 289 1330 4180

6/27/2013 282 1340 4110

7/23/2013 263 1260 3910

9/30/2013 303 1370 4100

10/28/2013 312 1300 4410

11/18/2013 362 1440 4750

12/13/2013 316 1270 4060

1/30/2014 326 1460 3990

2/27/2014 331 1370 4170

3/31/2014 357 1470 5790

4/23/2014 283 1180 3840

5/15/2014 290 1160 4230

6/25/2014 285 1240 4210

Pump Test 

(June 2012)

WW8R
!.

!. !.

!.

!.

!.

!.

!.

MW-121

MW-47

MW-13 610

611-R

605-L

604-L

603-S

602-L

607-R

609-L

!.

!.

!.

!.

!.

!.

!.

!.

!. !.

!.

!.

!.

!.

!.

MW-121

MW-47

MW-13 610

611-R

605-L

604-L

603-S

602-L

607-R

609-L

!.

!.

!.

!.

!.

!.

!.

Figure 3-9

Off-Site Phase 2 and Phase 3 

Monitoring Wells Groundwater Average 

PFBS, PFHS and PFOS Concentrations

March - April 2012 μ

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\offsite_phase2_3_Mar_April2012.mxd, 12/9/2013 8:33:56 AM, ricksc

Legend

!. Monitoring Well Locations

Facility Boundary

Tennessee River

0 2,000 4,000 Feet

Note:

Average sulfonate concentrations based on 

primary and duplicate results in ng/mL (ppb).

Well ID PFBS PFHS PFOS

MW-47 0.174 0.113 0.166

Well ID PFBS PFHS PFOS

MW-121 <0.0250 <0.0250 0.0307

Well ID PFBS PFHS PFOS

602S 0.288 0.182 0.468

602L 0.0699 0.252 0.544

Well ID PFBS PFHS PFOS

603S 0.177 0.119 0.417

603L 0.0946 0.108 0.0905

Well ID PFBS PFHS PFOS

604R 0.310 0.184 1.12

604S 0.340 0.229 0.478

604L 0.449 0.227 0.811

Well ID PFBS PFHS PFOS

605R 0.134 0.115 0.0532

605L 0.0988 0.203 0.213

Well ID PFBS PFHS PFOS

607R 0.187 0.192 0.274

607L 0.180 0.220 0.322

Well ID PFBS PFHS PFOS

609R 0.433 0.0947 0.162

609L 0.348 0.169 0.569

Well ID PFBS PFHS PFOS

610S 0.0543 0.0756 0.275

610L 0.131 0.136 0.646

Well ID PFBS PFHS PFOS

611R 0.295 0.128 0.650

611L 0.261 0.140 0.458

Well ID PFBS PFHS PFOS

MW-13S 0.0831 0.0404 <0.0232

MW-13I 0.0682 0.0457 <0.0232

MW-13B 0.0803 0.0521 0.0376

Imagery: ESRI Bing Mapping Service
!.

!.

!. !.

!.

MW-4

MW-3

MW-2

MW-1

MW-13

Highway 20/72

!.

!.

!. !.

!.

MW-4

MW-3

MW-2

MW-1

MW-13

Highway 20/72

Figure 3-10

Morgan County Landfill

Groundwater Monitoring Wells

Average PFBS, PFHS and PFOS

Concentrations

November 2010 and April 2012 μ

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\Morgan_landfill_PFOA.mxd, 9/15/2014 1:44:14 PM, ricksc

Legend

!. Monitoring Well Locations

Approximate Parcel Boundary

0 525 1,050 Feet

Note:

Average sulfonate concentrations based on 

primary and duplicate results in ng/mL (ppb).

Well ID PFBS PFHS PFOS

MW1S 1.77 2.23 6.42

MW1I 0.493 0.966 1.47

MW1B 2.26 3.28 7.40

Nov-10

Well ID PFBS PFHS PFOS

MW2I 2.06 1.38 5.20

MW2B 1.24 1.38 14.8

Nov-10

Well ID PFBS PFHS PFOS

MW3S <0.0250 <0.0250 0.0306

MW3I 0.0279 0.0324 0.262

MW3B 0.0381 0.0326 0.283

Well ID Nov-10 PFBS PFHS PFOS

MW4S <0.0250 <0.0250 0.256

MW4I <0.0250 <0.0250 0.144

MW4B <0.0250 <0.0250 0.0475

Nov-10

Well ID PFBS PFHS PFOS

MW-13S 0.0957 0.0559 <0.0250

MW-13I 0.0843 0.0526 <0.0250

MW-13B 0.0987 0.0717 <0.0250

MW-13S 0.0831 0.0404 <0.0232

MW-13I 0.0682 0.0457 <0.0232

MW-13B 0.0803 0.0521 0.0376

Nov-10

Apr-12

Imagery: ESRI Bing Mapping Service

Well Designations

S = Shallow (residuum)

I = Intermediate (epikarst)

B = Bedrock
&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

331S

227R

222R 220L

203L

330R

327R

310R

328L

324L

317L

Tennessee River/

Wheeler Reservoir

Chemical 

Plant

Closed

Landfill

335S

WW8R

WW9R

Avenue A

State Docks Road

312R

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

&<

331S

227R

222R 220L

203L

330R

327R

310R

328L

324L

317L

Tennessee River/

Wheeler Reservoir

Chemical 

Plant

Closed

Landfill

335S

WW8R

WW9R

Avenue A

State Docks Road

312R

Figure 3-11

Groundwater Average

PFBS, PFHS and PFOS Concentrations

Chemical Plant and 

Closed Landfill Area μ April 2012

450 225 0 Feet

Legend:

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\Chemicalplant_closedlandfill_April2012.mxd, 10/9/2013 3:58:14 PM, ricksc

&< Groundwater sampling locations

Notes:

-Average sulfonate concentrations based on primary and

 duplicate results in ng/mL (ppb).

-GRS04 is a composite sample from multiple extraction wells.

R - Residuum Well

S - Epikarst Well

L - Bedrock Well

PFBS PFHS PFOS

<0.0250 0.0877 0.230

317L

PFBS PFHS PFOS

986 328 671

310R

PFBS PFHS PFOS

2120 185 462

PFBS PFHS PFOS

397 359 146

330R

330L

PFBS PFHS PFOS

997 473 850

RW331S

PFBS PFHS PFOS

864 1600 3600

335R

PFBS PFHS PFOS

740 494 992

RW312R

PFBS PFHS PFOS

82.1 88.4 194

324L

PFBS PFHS PFOS

62.1 146 345

RW327R

PFBS PFHS PFOS

31.0 57.0 144

PFBS PFHS PFOS

47.9 18.7 1.14

328L

328R

PFBS PFHS PFOS

14.8 86.3 616

PFBS PFHS PFOS

220 40.1 220

227R

227L

PFBS PFHS PFOS

6.90 29.8 33.0

PFBS PFHS PFOS

8.52 41.4 49.5

220R

220L

PFBS PFHS PFOS

64.5 407 351

222R

PFBS PFHS PFOS

30.8 202 666

203L 

PFBS PFHS PFOS

2300 8280 NR

GRSO4
Field 12

Field 13

Finley Island Road

Field 9

State Docks Road

Field 10

Field 11

Field 5

Nebo Road

Highway 20/72

Field 14

Field 8c

50 0- g al N o . 2 

Fu el O il A ST

21 7D

21 7R

21 7S

Norfolk Southern Railroad

Field 8b

138-R

134S

136S

130S

133L

131R

137S

135-R

140R

141R

144R

142R

143R

145R

Field 12

Field 13

Finley Island Road

Field 9

State Docks Road

Field 10

Field 11

Field 5

Nebo Road

Highway 20/72

Field 14

Field 8c

50 0- g al N o . 2 

Fu el O il A ST

21 7D

21 7R

21 7S

Norfolk Southern Railroad

Field 8b

138-R

134S

136S

130S

133L

131R

137S

135-R

140R

141R

144R

142R

143R

145R

Figure 3-12

Former Sludge Incorporation Area

Groundwater Average 

PFBS, PFHS and PFOS Results

March - April 2012

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\Former_Slugde_gw_Mar_April2012.mxd, 12/9/2013 2:02:15 PM, ricksc

Notes:

-Average sulfonate concentration is the average of primary and 

 duplicate sample analytical results in ng/mL (ppb).

Legend:

Groundwater 

Sampling Location

Daikin Property

Note:

R - Residuum Well

S - Epikarst Well

L - Bedrock Well

800 400 Feet 0

Well ID PFBS PFHS PFOS

130R 14.6 119 405

130S 3.54 31.0 81.0

130L 1.53 12.7 50.7

Well ID PFBS PFHS PFOS

131R 40.2 234 1120

131S 0.860 4.75 5.80

131L 3.13 20.6 27.3

Well ID PFBS PFHS PFOS

133R 3.04 19.6 21.2

133S 8.57 61.6 160

133L 5.87 39.1 70.1

Well ID PFBS PFHS PFOS

134R 55.9 556 1030

134S 0.428 4.77 13.7

134L 9.80 103 328

Well ID PFBS PFHS PFOS

135R 67.3 765 974

135S 2.17 21.2 13.5

135L 10.9 79.4 59.0

Well ID PFBS PFHS PFOS

136R NS[D] NS[D] NS[D]

136S 2.58 17.7 66.1

136L 2.32 16.0 60.9

Well ID PFBS PFHS PFOS

137R NS[D] NS[D] NS[D]

137S 0.109 0.0922 0.355

137L 0.0679 0.0876 1.27

Well ID PFBS PFHS PFOS

138R NS[D] NS[D] NS[D]

138S 5.38 26.4 200

138L <0.0250 0.0649 0.396

Well ID PFBS PFHS PFOS

140R 1.59 17.7 106

Well ID PFBS PFHS PFOS

141R 0.0369 0.303 5.59

Well ID PFBS PFHS PFOS

142R 2.08 11.2 55.4

Well ID PFBS PFHS PFOS

143R 1.56 5.69 13.7

Well ID PFBS PFHS PFOS

144S 1.99 9.03 13.4
0

μ1,000 2,000

Feet

3M Decatur, AL Facility

Figure 3-13

Residuum Groundwater

Elevation Contour Map

File: Y:\3MDec\MXD\Sulfonate\2013\Regional_GW_residuum.mxd, 12/9/2013 8:41:05 AM, ricksc

Imagery: ESRI Bing Mapping Service

Legend

&< Monitoring Well

Groundwater Elevation Contour

(feet above mean sea level)

Line of Groundwater

Gradient Convergence

(Approximate)

Groundwater Flow Direction

Notes: Groundwater levels recorded

 in late March/early April 2012.

 Off-Site well locations are 

 approximate.
0

μ1,000 2,000

Feet

3M Decatur, AL Facility

Figure 3-14

Bedrock Groundwater

Elevation Contour Map

File: Y:\3MDec\MXD\Sulfonate\2013\Regional_GW_bedrock.mxd, 12/9/2013 8:43:14 AM, ricksc

Imagery: ESRI Bing Mapping Service

Legend

&< Monitoring Well

Groundwater Elevation Contour

(feet above mean sea level)

Line of Groundwater

Gradient Convergence

(Approximate)

Groundwater Flow Direction

Notes: Groundwater levels recorded

 in late March/early April 2012.

 Off-Site well locations are 

 approximate.
Figure 3-15

Regional Disposal μ Facility Map

Legend:

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\Phase3_landfills.mxd, 12/9/2013 8:44:43 AM, ricksc

Morgan County Landfill

9,700 4,850 0 Feet

Browns Ferry 

Road Site

BFI Morris Farm Landfill

^_ Landfill

3M Decatur Facility Boundary

Imagery: ESRI Bing Mapping Service
&<

&<

&< &<

&<

&<

&<

MW-01

MW-02

MW-03

MW-04

MW-13

MW-05

MW-10

&<

&<

&< &<

&<

&<

&<

MW-01

MW-02

MW-03

MW-04

MW-13

MW-05

MW-10

Figure 3-16

BFI Morris Farms Landfill Groundwater

Average PFBS, PFHS and PFOS

Concentrations

March 2011 μ

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\BFI_Morris_Farm_landfill.mxd, 8/27/2014 5:36:51 PM, ricksc

0 375 750 Feet

Legend

&< Monitoring Well Locations (Clusters)

Approximate Parcel Boundary

Average sulfonate concentrations are the average 

of primary and duplicate sample analytical results 

in ng/mL (ppb).

MW-xx = Shallow (residuum) monitoring well

MW-xxD = Deep (bedrock) monitoring well

Well ID PFBS PFHS PFOS

MW01 < 0.0250 < 0.0250 < 0.0300

MW01D 0.194 0.0533 0.353

Well ID PFBS PFHS PFOS

MW02 0.194 0.467 1.42

MW02D 0.142 0.424 1.10

Well ID PFBS PFHS PFOS

MW03 < 0.0250 0.0667 0.209

MW03D < 0.0250 < 0.0250 < 0.0300

Well ID PFBS PFHS PFOS

MW04 1.67 12.8 22.5

MW04D 0.171 0.342 0.184

Well ID PFBS PFHS PFOS

MW05 1.05 1.35 2.08

MW05D 0.0280 0.0323 < 0.0300

Well ID PFBS PFHS PFOS

MW10 0.0426 0.121 0.242

MW10D < 0.0250 0.0281 < 0.0300

Well ID PFBS PFHS PFOS

MW13 4.13 1.27 8.28

MW13D 5.03 1.48 8.68

Imagery: ESRI Bing Mapping Service
Figure 3-17

Browns Ferry Road Site

Groundwater Average

PFBS, PFHS and PFOS Concentrations

August 2013

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\Browns_Ferry_Road_Site_GW_August2013.mxd, 10/17/2013 9:23:52 AM, johna

0 250 500 Feet

Legend

Property Line

Area of Suspected Waste Disposal

Existing Monitoring Wells

New Monitoring Wells

Surface Water Samplng Locations

Imagery Source: ESRI, Bing Mapping Service

Note:

Sulfonate concentrations are the averages of primary and

duplicate sample analytical results in ng/mL (ppb).

Well ID PFBS PFHS PFOS

MW1R 0.109 0.872 1.69

Well ID PFBS PFHS PFOS

MW3R 3.91 19.6 23.2

Well ID PFBS PFHS PFOS

MW4R 0.648 16.5 23.4

MW4L 0.0935 0.254 0.540

Well ID PFBS PFHS PFOS

MW5R 0.0605 0.138 0.089

MW5L 0.168 0.273 1.27

Well ID PFBS PFHS PFOS

MW6R 0.25 0.677 7.68

MW6L 0.0551 0.0855 0.342

Well ID PFBS PFHS PFOS

MW7R 0.515 1.77 25.1

Well ID PFBS PFHS PFOS

MW8R 0.0583 0.119 0.259

Well ID PFBS PFHS PFOS

MW9R <0.0250 0.0545 <0.0232

MW9L <0.0250 <0.0250 0.0445

Well ID PFBS PFHS PFOS

MW10R 0.0675 0.300 0.565

Well ID PFBS PFHS PFOS

MW11L <0.0250 0.0777 0.383
Tennesee River

3M Decatur

Lower Reach

Middle Reach

Upper Reach

#*

#*

#*

Flow

Bakers

Creek

LOC001

LOC002

LOC003

0

μ500 1,000

Feet

Legend:

3M Decatur, AL Facility

Figure 3-18

Fish Filet Tissue 

Average 

PFOS Concentrations

Bakers Creek and

Tennessee River

April 2012

File: Y:\3MDec\MXD\Largemouth_Bass_PFOS_April2012_v2.mxd, 8/21/2014 6:22:11 PM, ricksc

Imagery Source: ESRI Bing 

Mapping Service 2013

Fish Sampling Location

Surface Water #* Sampling Locations

Note: PFOS concentrations are

 the average of primary and 

 duplicate sample analytical 

 results on a wet weight basis.

Middle Reach PFOS (ng/g)

MSF02 4240

MSF07 2920

MSF08 1360

MSF09 2020

MSF27 (MSF09D) 2120

MSF10 1840

MSF11 2940

MSF11D (AXYS) 3720

MSF11D (AXYS Dup) 3510

MSF12 526

MSF13 950

MSF14 3370

MSF15 754

Lower Reach PFOS (ng/g)

MSF01 4770

MSF16 1520

MSF17 165

MSF28 (MSF17D) 180

MSF24 437

MSF24D (AXYS) 537

MSF25 306

MSF26 2090

MSF29 (MSF26D) 2050

Upper Reach PFOS (ng/g)

MSF03 70.7

MSF04 576

MSF05 471

MSF05D (AXYS) 656

MSF06 156

MSF18 701

MSF19 675

MSF20 1180

MSF21 671

MSF22 4660

MSF23 52.5
3M Decatur

Lower Reach

Middle Reach

Upper Reach

#*

#*

#*

Tennesee River

Flow

Bakers

Creek

0

μ500 1,000

Feet

Legend:

3M Decatur, AL Facility

Figure 3-19

Surface Water 

Average

PFOS Concentrations

Bakers Creek and

Tennessee River

April 2012

File: Y:\3MDec\MXD\Surface_Water_PFOS_April2012_v2.mxd, 8/21/2014 6:24:51 PM, ricksc

Imagery Source: ESRI Bing 

Mapping Service 2013

Fish Sampling Location

Surface Water #* Sampling Locations

Note: PFOS concentrations are

 the average of primary and 

 duplicate sample analytical 

 results.

Sample ID PFOS (ng/mL)

LOC001 0.450

Sample ID PFOS (ng/mL)

LOC002 0.691

Sample ID PFOS (ng/mL)

LOC003 0.0237
Shoal Creek

Big Nance 

Creek

Joe Wheeler Dam

Spring Creek

Mallard Creek

Round Island

Creek Swan Creek

Bakers Creek

Flint Creek

Betty Rye 

&

Dry Branch 

Fox Creek

Elk River

15

13 12

11

9

8

6

10

5

7

4

3 2

1

14

Wilson Reservoir

Wheeler Reservoir

μ

0 1 2 4

Miles

3M Decatur, AL Facility

Figure 3-20

Fish Filet Tissue Average 

PFBS Concentrations

Tennessee River

October/November 2012

File: Y:\3MDec\MXD\Sulfonate\2013\Fish_Reach_samp_areas_Tissue_PFBS_Results.mxd, 12/9/2013 8:48:20 AM, ricksc

Imagery: ESRI Bing Mapping Service

Legend

Facility Boundary

Fish Sampling Area

Notes:

- Average sulfonate is the average of

 primary and duplicate sample analytical 

 results in (ng/g, ppb) on a wet weight basis

-Duplicate sample results provided

 in parentheses

Bass Catfish

<0.252 <0.252 (<0.980)

<0.252 (<0.252) <0.252

<0.252 <0.252

<0.252 <0.252

<0.252 <0.252

Reach 01 - PFBS

Bass Catfish

<0.252 <0.252

<0.252 <0.252

<0.252 <0.252

<0.252 (<0.976) <0.252 (<0.252)

<0.252 <0.252

Reach 02 - PFBS

Bass Catfish

<0.252 (<0.990) <0.252

<0.252 <0.252

<0.252 <0.252

<0.252 (<0.252) <0.252

<0.252 <0.252

Reach 03 - PFBS

Bass Catfish

<0.252 <0.252

<0.252 <0.252 (<0.252)

<0.252 (<0.948) <0.252

<0.252 <0.252

<0.252 <0.252

Reach 04 - PFBS

Bass Catfish

<0.503 <0.503 (<0.503)

2.21 (2.04) <0.503

<0.503 <0.503

<0.503 <0.503

<0.252 <0.503

Reach 05 - PFBS

Bass Catfish

<0.252 <0.252

<0.252 <0.252

<0.252 (<0.962) <0.252

<0.503 <0.252

<0.503 <0.252

Reach 06 - PFBS

Bass Catfish

0.444 <0.252

<0.252 <0.252 (<0.905)

<0.252 <0.252

<0.252 (<0.252) <0.503

<0.252 <0.503

Reach 07 - PFBS

Bass Catfish

<0.252 (<0.252) <0.252

<0.252 <0.252

<0.252 <0.252 (<0.962)

<0.252 <0.252

<0.252 <0.252

Reach 08 - PFBS

Bass Catfish

<1.10 <1.10

<1.10 (<1.10) <1.10 (<1.10)

<1.10 (<0.990) 0.887

<0.252 0.460

<0.252 1.31

Reach 09 - PFBS

Bass Catfish

0.590 (<0.939) <1.10

0.459 <1.10

0.219 1.86

0.582 (0.996) 0.371

0.259 <0.503 (<1.01)

Reach 10 - PFBS

Bass Catfish

0.131 (0.138) <1.10

<0.252 3.82

<0.252 0.305

<0.503 0.405

<0.503 <0.503 (<0.943)

Reach 11 - PFBS

Bass Catfish

<1.10 <1.10 (<0.966)

<1.10 <1.10

0.184 <0.503

0.294 <0.503

0.176 (0.859) 0.506

Reach 12 - PFBS

Bass Catfish

<1.10 2.67

NR <0.252

<1.10 <0.252 (<0.252)

<1.10 0.322

<1.10 <0.252

Reach 13 - PFBS

Bass Catfish

<0.252 0.327

0.269 (<0.252) <0.252

<0.252 (<0.990) 0.337

<0.252 1.54

<0.252 <0.252

Reach 14 - PFBS

Bass Catfish

<0.252 <0.252 (0.327)

0.289 0.854

<0.252 (<0.797) 0.353

<0.252 <0.252

<0.252 0.739

Reach 15 - PFBS
Shoal Creek

Big Nance 

Creek

Joe Wheeler Dam

Spring Creek

Mallard Creek

Round Island

Creek Swan Creek

Bakers Creek

Flint Creek

Betty Rye 

&

Dry Branch 

Fox Creek

Elk River

15

13 12

11

9

8

6

10

5

7

4

3 2

1

14

Wilson Reservoir

Wheeler Reservoir

μ

0 1 2 4

Miles

3M Decatur, AL Facility

Figure 3-21

Fish Filet Tissue Average 

PFHS Concentrations

Tennessee River

October/November 2012

File: Y:\3MDec\MXD\Sulfonate\2013\Fish_Reach_samp_areas_Tissue_PFHS_Results.mxd, 12/9/2013 8:50:22 AM, ricksc

Imagery: ESRI Bing Mapping Service

Legend

Facility Boundary

Fish Sampling Area

Notes:

- Average sulfonate is the average of

 primary and duplicate sample analytical 

 results in (ng/g, ppb) on a wet weight basis

-Duplicate sample results provided

 in parentheses

Bass Catfish

<0.250 (<0.250) <0.252 (<0.980)

<0.250 <0.252

<0.250 <0.252

<0.250 <0.252

<0.250 <0.252

Reach 01 - PFHS

Bass Catfish

<0.250 <0.250

<0.250 <0.250

<0.250 <0.100

<0.250 (<0.976) <0.100 (<0.100)

<0.250 <0.100

Reach 02 - PFHS

Bass Catfish

<0.100 (<0.990) <0.100

<0.100 <0.100

<0.100 <0.100

<0.100 (<0.100) <0.100

<0.100 <0.100

Reach 03 - PFHS

Bass Catfish

<0.250 <0.250

<0.250 <0.250 (<0.250)

<0.250 (<0.948) <0.250

<0.250 <0.250

<0.250 <0.250

Reach 04 - PFHS

Bass Catfish

<0.250 <0.250 (<0.250)

0.783 (<0.893) <0.250

0.391 <0.250

<0.250 <0.250

<0.500 <0.250

Reach 05 - PFHS

Bass Catfish

<0.250 <0.250

<0.250 <0.250

<0.100 (<0.962) <0.250

<0.250 <0.250

<0.250 <0.250

Reach 06 - PFHS

Bass Catfish

0.416 <0.250

<0.100 <0.250 (<0.905)

0.123 <0.250

<0.100 (<0.250) <0.250

<0.250 <0.250

Reach 07 - PFHS

Bass Catfish

<0.250 (<0.250) <0.250

<0.250 <0.250

<0.250 <0.250 (<0.962)

<0.250 <0.250

<0.250 <0.250

Reach 08 - PFHS

Bass Catfish

<0.250 <0.250

<0.250 (<0.250) <0.250 (<0.250)

<0.250 (<0.250) 1.54

<0.250 <0.250

<0.250 <0.250

Reach 09 - PFHS

Bass Catfish

<0.250 (<0.939) <0.250

<0.250 <0.250

<0.250 <0.250

<0.250 (<0.250) <0.250

<0.250 <0.250 (<1.01)

Reach 10 - PFHS

Bass Catfish

<0.250 (<0.250) <0.250

<0.250 <0.250

<0.250 <0.250

<0.250 <0.250

<0.250 <0.250 (<0.943)

Reach 11 - PFHS

Bass Catfish

<0.250 <0.250 (<0.966)

<0.250 <0.250

<0.250 <0.250

<0.250 <0.250

<0.250 (<0.250) <0.500

Reach 12 - PFHS

Bass Catfish

<0.250 <0.250

<0.250 <0.500

<0.250 <0.500 (<0.500)

<0.250 <0.500

<0.250 <0.500

Reach 13 - PFHS

Bass Catfish

<0.250 <0.250

<0.250 (<0.250) <0.250

<0.250 (<0.990) <0.250

<0.250 <0.250

<0.250 <0.250

Reach 14 - PFHS

Bass Catfish

<0.250 <0.250 (<0.250)

<0.250 <0.250

<0.250 (<0.797) <0.250

<0.250 <0.250

<0.250 <0.250

Reach 15 - PFHS
Shoal Creek

Big Nance 

Creek

Joe Wheeler Dam

Spring Creek

Mallard Creek

Round Island

Creek Swan Creek

Bakers Creek

Flint Creek

Betty Rye 

&

Dry Branch 

Fox Creek

Elk River

15

13 12

11

9

8

6

10

5

7

4

3 2

1

14

Wilson Reservoir

Wheeler Reservoir

μ

0 1 2 4

Miles

3M Decatur, AL Facility

Figure 3-22

Fish Filet Tissue Average 

PFOS Concentrations

Tennessee River

October/November 2012

File: Y:\3MDec\MXD\Sulfonate\2013\Fish_Reach_samp_areas_Tissue_PFOS_Results.mxd, 12/9/2013 8:51:54 AM, ricksc

Imagery: ESRI Bing Mapping Service

Legend

Facility Boundary

Fish Sampling Area

Notes:

- Average sulfonate is the average of

 primary and duplicate sample analytical 

 results in (ng/g, ppb) on a wet weight basis

-Duplicate sample results provided

 in parentheses

Bass Catfish

35.8 (36.3) 1.81 (1.66)

32.7 0.768

27.9 1.50

18.6 5.17

37.8 0.836

Reach 01 - PFOS

Bass Catfish

44.1 2.92

32.6 3.41

49.5 1.78

49.0 (56.6) 1.30 (1.24)

40.8 2.65

Reach 02 - PFOS

Bass Catfish

21.8 (22.0) 0.897

25.7 2.01

31.2 0.961

23.9 (19.9) 4.45

73.2 2.11

Reach 03 - PFOS

Bass Catfish

104 4.69

159 50.9 (42.0)

434 (432) 2.42

124 7.85

218 29.1

Reach 04 - PFOS

Bass Catfish

435 85.6 (79.3)

373 (345) 83.4

96.4 283

599 542

521 286

Reach 05 - PFOS

Bass Catfish

69.0 4.37

46.9 4.37

40.8 (43.9) 2.22

50.6 4.15

120 3.41

Reach 06 - PFOS

Bass Catfish

408 26.9

262 69.6 (57.8)

250 64.2

333 (324) 11.7

178 29.2

Reach 07 - PFOS

Bass Catfish

134 (143) 22.6

45.0 3.98

76.9 4.89 (4.12)

175 1.90

80.3 8.55

Reach 08 - PFOS

Bass Catfish

259 12.1

167 (168) 14.3 (14.6)

173 (186) 45.5

279 18.6

281 21.9

Reach 09 - PFOS

Bass Catfish

65.2 (56.1) 8.86

190 13.4

207 8.12

101.9 (106) 14.4

104 16.3 (14.5)

Reach 10 - PFOS

Bass Catfish

210 (224) 8.49

116 18.3

225 15.7

115 22.2

145 11.9 (12.3)

Reach 11 - PFOS

Bass Catfish

65.8 11.7 (10.2)

98.2 5.10

54.9 11.2

66.4 4.87

65.3 (65.9) 10.7

Reach 12 - PFOS

Bass Catfish

71.0 10.3

98.5 8.57

68.9 11.8 (12.7)

67.1 10.5

79.6 7.69

Reach 13 - PFOS

Bass Catfish

54.1 14.3

88.9 (81.6) 5.59

93.5 (91.7) 8.01

54.8 6.68

75.3 11.0

Reach 14 - PFOS

Bass Catfish

64.7 7.33 (7.56)

75.5 6.67

103 (99.8) 10.5

86.9 9.60

94.6 5.63

Reach 15 - PFOS
Shoal Creek

Big Nance 

Creek

Joe Wheeler Dam

Spring Creek

Mallard Creek

Round Island

Creek Swan Creek

Bakers Creek

Flint Creek

Betty Rye 

&

Dry Branch 

Fox Creek

Elk River

15

13 12

11

9

8

6

10

5

7

4

3 2

1

14

Wilson Reservoir

Wheeler Reservoir

0 1

μ

2 4

Miles

3M Decatur, AL Facility

Figure 3-23

Surface Water - Fish Reaches 

Average 

PFBS, PFHS and PFOS

Concentrations

Tennessee River

November 2012

File: Y:\3MDec\MXD\Sulfonate\2013\Fish_Reach_samp_areas_Nov2012.mxd, 12/9/2013 8:59:12 AM, ricksc

Imagery: ESRI Bing Mapping Service

Legend

Facility Boundary

Fish Sampling Area

Notes:

-Average sulfonate concentrations of

primary and duplicate sample analytical 

results in parts per billion (ppb) 

- R01L1 - Reach 01 Location 1

- Significant digits determined by 

analytical data package

(data reported in ng/L, ppt)

Location PFBS PFHS PFOS

R1L1 < 0.00500 < 0.00500 0.00691

R1L2 < 0.00500 < 0.00500 0.00762

R1L3 < 0.00500 < 0.00500 0.00669

Location PFBS PFHS PFOS

R2L1 < 0.00500 < 0.00500 0.00932

R2L2 < 0.00500 0.00703 0.00906

R2L3 < 0.00500 < 0.00500 0.00894

R2L3 (DUP) < 0.00500 < 0.00500 0.00846

Location PFBS PFHS PFOS

R3L1 < 0.00500 < 0.00500 0.00703

R3L2 < 0.00500 < 0.00500 0.00734

R3L3 < 0.00500 < 0.00500 0.00639

Location PFBS PFHS PFOS

R4L1 < 0.00500 < 0.00500 0.0144

R4L2 < 0.00500 < 0.00500 0.0180

R4L3 0.0104 0.0110 0.0705

Location PFBS PFHS PFOS

R5L1 0.124 0.0398 0.385

R5L1 (DUP) 0.116 0.0423 0.405

R5L2 < 0.00500 < 0.00500 0.0177

R5L3 < 0.00500 < 0.00500 0.00984

Location PFBS PFHS PFOS

R6L1 < 0.00500 < 0.00500 0.00684

R6L2 < 0.00500 < 0.00500 0.00672

R6L3 < 0.00500 < 0.00500 0.00677

Location PFBS PFHS PFOS

R7L1 0.0464 0.0164 0.0842

R7L2 0.0638 0.0195 0.102

R7L3 0.00965 < 0.00500 0.0348

Location PFBS PFHS PFOS

R8L1 < 0.00500 < 0.00500 0.00642

R8L2 < 0.00500 < 0.00500 0.00657

R8L3 < 0.00500 < 0.00500 0.00767

Location PFBS PFHS PFOS

R9L1 0.0641 0.0197 0.103

R9L2 0.0846 0.0262 0.125

R9L3 0.0594 0.0196 0.0910

Location PFBS PFHS PFOS

R10L1 < 0.00500 < 0.00500 0.00682

R10L2 < 0.00500 < 0.00500 0.00699

R10L3 < 0.00500 < 0.00500 0.00649

R10L3 < 0.00500 < 0.00500 0.00663

Location PFBS PFHS PFOS

R11L1 0.0521 0.0179 0.0878

R11L2 0.0511 0.0189 0.0910

R11L3 0.0289 0.0113 0.0695

Location PFBS PFHS PFOS

R12L1 < 0.00500 < 0.00500 0.0124

R12L2 < 0.00500 < 0.00500 0.0138

R12L3 < 0.00500 < 0.00500 0.0133

Location PFBS PFHS PFOS

R13L1 0.0100 < 0.00500 0.0248

R13L2 0.0120 < 0.00500 0.0277

R13L3 0.00983 < 0.00500 0.0238

Location PFBS PFHS PFOS

R14L1 0.00761 < 0.00500 0.0187

R14L2 0.00769 < 0.00500 0.0190

R14L3 0.00847 < 0.00500 0.0230

Location PFBS PFHS PFOS

R15L1 0.0148 < 0.00500 0.0199

R15L1 (DUP) 0.0137 < 0.00500 0.0189

R15L2 0.0132 < 0.00500 0.0184

R15L3 0.0141 < 0.00500 0.0181
#*

#*#*#*#*#* #*#*#* #*

#*

#*

#*

#*

#*

#*

#*

#*

#*

#*

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#*#*#*#*#*#*#*#*

#*##*##*

#*#*

#*#*

#*#*

#*

#*#*

#*

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#*#*#*#* #*#* #

#*#*#**

#*

#*

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#*

#*

#*

#*

#*

#*#*

#*#*

#*

#*

#*

#*

#*#*

#*#*

Shoal Creek

Big Nance 

Creek

Joe Wheeler Dam

Spring Creek

Mallard Creek

Round Island

Creek

Swan Creek

Bakers Creek

Flint Creek

Betty Rye 

&

Dry Branch 

Fox Creek

Elk River

T1

T2

T8

T3

T6

T5

T7

T4

T9

#*#*#*

#*#*#*#*#*#*#*

Wilson Reservoir

Wheeler Reservoir

μ

0 1 2 4

Miles

3M Decatur, AL Facility

Figure 3-24

Surface Water - Transects 

Average

PFBS, PFHS and PFOS

Concentrations

December 2012

Tennessee River

File: Y:\3MDec\MXD\Sulfonate\2013\Fish_Reach_Transect_Dec2012.mxd, 8/21/2014 1:42:46 PM, ricksc

Imagery: ESRI Bing Mapping Service

Legend

Facility Boundary

Surface Water 

Transect Location

#* Transect Locations

T1 Transect 1

Note:

- Average sulfonate is the average of

primary and duplicate sample analytical

results in parts per billion (ppb)

- Sample node numbers are in numerical 

order across transects from south 

(Location 01) to north (Location 10)

- T110 = Transect 1 Location 10

- Significant digits determined by 

analytical data package

(data reported in ng/L, ppt)

Location PFBS PFHS PFOS

T110 < 0.00500 < 0.00500 0.00670

T109 < 0.00500 < 0.00500 0.00645

T108 < 0.00500 0.00938 0.00660

T107 < 0.00500 < 0.00500 0.00638

T106 < 0.00500 < 0.00500 0.00643

T105 < 0.00500 < 0.00500 0.00663

T104 < 0.00500 < 0.00500 0.00689

T103 < 0.00500 < 0.00500 0.00680

T102 < 0.00500 < 0.00500 0.00615

T101 < 0.00500 < 0.00500 0.00613

T101 (DUP) < 0.00500 < 0.00500 0.00636

Location PFBS PFHS PFOS

T210 < 0.00500 < 0.00500 0.00777

T209 < 0.00500 < 0.00500 0.00698

T208 < 0.00500 < 0.00500 0.00644

T207 < 0.00500 < 0.00500 0.00683

T206 < 0.00500 < 0.00500 0.00679

T205 < 0.00500 < 0.00500 0.00696

T204 < 0.00500 < 0.00500 0.00623

T203 < 0.00500 < 0.00500 0.00650

T202 < 0.00500 < 0.00500 0.00993

T202 (DUP) < 0.00500 < 0.00500 0.00943

T201 < 0.00500 < 0.00500 0.00835

Location PFBS PFHS PFOS

T310 < 0.00500 < 0.00500 0.00732

T309 < 0.00500 < 0.00500 0.00658

T308 < 0.00500 < 0.00500 0.00698

T307 < 0.00500 < 0.00500 0.00657

T306 < 0.00500 < 0.00500 0.00611

T305 < 0.00500 < 0.00500 0.00730

T304 < 0.00500 < 0.00500 0.00768

T303 < 0.00500 < 0.00500 0.00694

T303 (DUP) < 0.00500 < 0.00500 0.00751

T302 < 0.00500 < 0.00500 0.00746

T301 < 0.00500 < 0.00500 0.0190

Location PFBS PFHS PFOS

T410 < 0.00500 < 0.00500 0.00778

T409 < 0.00500 < 0.00500 0.00673

T408 < 0.00500 < 0.00500 0.00704

T407 < 0.00500 < 0.00500 0.00731

T406 < 0.00500 < 0.00500 0.00742

T405 < 0.00500 < 0.00500 0.00821

T404 < 0.00500 < 0.00500 0.00729

T404 (DUP) < 0.00500 < 0.00500 0.00846

T403 < 0.00500 < 0.00500 0.00752

T402 < 0.00500 < 0.00500 0.00869

T401 0.285 0.0174 0.138

Location PFBS PFHS PFOS

T510 < 0.00500 < 0.00500 0.00857

T509 < 0.00500 < 0.00500 0.00815

T508 < 0.00500 < 0.00500 0.00820

T507 < 0.00500 < 0.00500 0.0081

T506 < 0.00500 < 0.00500 0.00682

T505 < 0.00500 < 0.00500 0.00720

T505 (DUP) < 0.00500 < 0.00500 0.00678

T504 < 0.00500 < 0.00500 0.00789

T503 0.0638 0.00835 0.0492

T502 0.115 0.0126 0.0765

T501 0.105 0.0143 0.0728

Location PFBS PFHS PFOS

T610 < 0.00500 < 0.00500 0.00783

T609 < 0.00500 < 0.00500 0.00766

T608 < 0.00500 < 0.00500 0.00692

T607 < 0.00500 < 0.00500 0.00649

T606 < 0.00500 < 0.00500 0.00972

T606 (DUP) < 0.00500 < 0.00500 0.0111

T605 0.0124 < 0.00500 0.0145

T604 0.0237 < 0.00500 0.0238

T603 0.0570 0.00919 0.0566

T602 0.124 0.0180 0.107

T601 0.0896 0.0242 0.0864

Location PFBS PFHS PFOS

T710 0.0177 < 0.00500 0.0176

T709 0.0106 < 0.00500 0.0134

T708 0.0140 < 0.00500 0.0165

T707 0.0190 < 0.00500 0.0202

T707 (DUP) 0.0210 < 0.00500 0.0193

T706 0.0269 < 0.00500 0.0242

T705 0.0362 0.00517 0.0312

T704 0.0325 < 0.00500 0.0316

T703 0.0556 0.00769 0.0468

T702 0.0651 0.00837 0.0466

T701 0.0710 0.00807 0.0426

Location PFBS PFHS PFOS

T810 0.0111 < 0.00500 0.0123

T809 0.00928 < 0.00500 0.0115

T808 0.0112 < 0.00500 0.0133

T808 (DUP) 0.0109 < 0.00500 0.0143

T807 0.0115 < 0.00500 0.0141

T806 0.0121 < 0.00500 0.0121

T805 0.0129 < 0.00500 0.0154

T804 0.0143 < 0.00500 0.0166

T803 0.0132 < 0.00500 0.0159

T802 0.0125 < 0.00500 0.0154

T801 0.0130 < 0.00500 0.0152

Location PFBS PFHS PFOS

T910 0.0134 < 0.00500 0.0190

T909 0.0128 < 0.00500 0.0192

T909 (DUP) 0.0140 < 0.00500 0.0194

T908 0.0134 < 0.00500 0.0203

T907 0.0127 < 0.00500 0.0214

T906 0.0139 < 0.00500 0.0197

T905 0.0147 < 0.00500 0.0244

T904 0.0137 < 0.00500 0.0207

T903 0.0142 < 0.00500 0.0201

T902 0.0112 < 0.00500 0.0205

T901 0.0177 < 0.00500 0.0203
!( !( !( !(

!(

!(

!( !(

!( !(

!(

!(

#*

#* #* #* #* #*

#*

#*

#*

#*

#*

#*

!(

SW12

SW11

SW10

SW09

SW08

SW07

SW06

SW05

SW03 SW04

SW02

SW01

GP12

GP11

GP10

GP09

GP08

GP07

GP06 GP05

GP04

GP03

GP01

GP02

216R

!( !( !( !(

!(

!(

!( !(

!( !(

!(

!(

#*

#* #* #* #* #*

#*

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SW12

SW11

SW10

SW09

SW08

SW07

SW06

SW05

SW03 SW04

SW02

SW01

GP12

GP11

GP10

GP09

GP08

GP07

GP06 GP05

GP04

GP03

GP01

GP02

216R

Figure 3-25

Avenue A Surface Water

and Groundwater 

Average PFBS, PFHS and PFOS

Concentrations μ June - July 2010

550 275 0 Feet

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\AveA__Soil_SW_GW.mxd, 8/21/2014 1:44:00 PM, ricksc

Imagery Source:

ESRI, i-cubed, USDA FSA, USGS, AEX, 

GeoEye, Getmapping, Aerogrid, IGP. 2010

Avenue A Ditch

Note:

Average sulfonate concentrations based on primary and

duplicate results in ng/mL (ppb)

Legend

!( Permanent Monitoring Well

!( Soil Sampling Locations (GPxx)

#* Surface Water Sampling Locations (SWxx)

Avenue A Ditch and Tributaries

PFBS PFHS PFOS

15.0 120 248

SW01

PFBS PFHS PFOS

7.68 52.0 213

SW02

PFBS PFHS PFOS

9.57 72.2 197

SW03

PFBS PFHS PFOS

13.7 86.5 192

SW04

PFBS PFHS PFOS

20.9 102 392

SW05

PFBS PFHS PFOS

17.4 77.5 228

SW06

PFBS PFHS PFOS

10.8 47.9 129

SW07

PFBS PFHS PFOS

40.7 166 266

SW08

PFBS PFHS PFOS

279 643 382

SW09

PFBS PFHS PFOS

22.5 233 389

SW10

PFBS PFHS PFOS

102 1130 850

SW11

PFBS PFHS PFOS

0.764 3.68 104

SW12

PFBS PFHS PFOS

5.02 7.63 26.2

GP01

PFBS PFHS PFOS

21.1 11.2 17.5

GP02

PFBS PFHS PFOS

66.4 413 373

GP03

PFBS PFHS PFOS

19.1 85.8 152

GP04

PFBS PFHS PFOS

30.0 158 382

GP05

PFBS PFHS PFOS

20.7 171 1780

GP07

PFBS PFHS PFOS

6.36 70.2 1420

GP08

PFBS PFHS PFOS

20.7 36.0 95.5

GP09

PFBS PFHS PFOS

447 420 127

GP10

PFBS PFHS PFOS

67.0 330 660

GP11

PFBS PFHS PFOS

2.59 11.2 48.8

GP12

PFBS PFHS PFOS

10.6 30.5 119

216R
!(

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#* #* #* #* #* #*

#*

#* #*

#*

#*

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#*#*

#*

#*

!(

!(

SS05

Tennessee River

Finley Island Road

State Docks Road

216R

SD17

SD16

SD15

SD13

SD12

SD11

SD10

SD09

SD08

SD07

SD06

SD05

SD04

SD03

SD02

SD01

GP12

GP11

GP10

GP09

GP08

GP07

GP06

GP05

GP03 GP04

GP01

SS09

SS08

SS07

SS06

SS03

SS02

SS01

SD14

GP02

SS04

0

μ250 500Feet

3M Decatur, AL Facility

Figure 3-26

Avenue A Soil and Sediment

Average 

PFBS, PFHS and PFOS

Concentrations

June - July 2010

File: Y:\3MDec\MXD\Sulfonate\2013\AvenueA_soil_sed.mxd, 12/9/2013 9:01:46 AM, ricksc

Imagery Source:

ESRI, i-cubed, USDA FSA, USGS, AEX, 

GeoEye, Getmapping, Aerogrid, IGP. 2010

Note:

Average sulfonate concentrations based on 

primary and duplicate results in ng/g (ppb) 

on a dry weight basis.

Legend

#* Sediment Sampling Locations 

!( Soil Sampling Locations

Avenue A Ditch and Tributaries

Depth PFBS PFHS PFOS

0 - 0.5 0.611 2.78 225

0.5 - 1.0 0.605 1.72 129

SD01

Depth PFBS PFHS PFOS

0 - 0.5 6.03 64.5 6770

0.5 - 1.0 1.21 12.7 1070

SD02

Depth PFBS PFHS PFOS

0 - 0.5 7.31 48.1 897

0.5 - 1.0 3.41 19.0 559

SD03

Depth PFBS PFHS PFOS

0 - 0.5 24.9 178 2120

0.5 - 1.0 8.93 79.0 1910

SD04

Depth PFBS PFHS PFOS

0 - 0.5 4.72 34.5 525

0.5 - 1.0 4.35 26.0 310

SD05

Depth PFBS PFHS PFOS

0 - 0.5 6.24 39.6 617

0.5 - 1.0 3.37 18.9 338

SD06

Depth PFBS PFHS PFOS

0 - 0.5 8.75 51.8 1660

0.5 - 1.0 9.48 60.9 2430

SD07 Depth PFBS PFHS PFOS

0 - 0.5 5.28 42.9 521

0 - 0.5 (DUP) 4.80 46.0 540

0.5 - 1.0 1.62 9.03 93.2

SD08

Depth PFBS PFHS PFOS

0 - 0.5 27.5 135 1300

0.5 - 1.0 14.0 101 1250

SD09

Depth PFBS PFHS PFOS

0 - 0.5 171 1030 4570

0.5 - 1.0 66.5 459 7830

SD10

Depth PFBS PFHS PFOS

0 - 0.5 8.42 156 1560

0.5 - 1.0 4.10 57.9 786

SD11

Depth PFBS PFHS PFOS

0 - 0.5 16.9 289 3210

0 - 0.5 (DUP) 17.3 293 3270

0.5 - 1.0 5.31 77.0 451

SD12

Depth PFBS PFHS PFOS

0 - 0.5 10.4 123 1250

0.5 - 1.0 12.6 138 1480

SD13

Depth PFBS PFHS PFOS

0 - 0.5 129 1450 9130

0.5 - 1.0 100 1460 5370

SD14

Depth PFBS PFHS PFOS

0 - 0.5 52.3 399 14600

0.5 - 1.0 17.3 146 13200

SD15

Depth PFBS PFHS PFOS

0 - 0.5 27.2 764 7060

0 - 0.5 (DUP) 33.6 830 8590

0.5 - 1.0 22.6 569 3120

SD16

Depth PFBS PFHS PFOS

0 - 0.5 28.2 1080 10700

0.5 - 1.0 24.8 853 7120

SD17

Depth PFBS PFHS PFOS

0 - 0.5 0.909 4.73 750

0.5 - 1.0 0.452 5.06 919

SS01

Depth PFBS PFHS PFOS

0 - 0.5 0.786 7.26 405

0.5 - 1.0 4.11 54.6 168

SS02

Depth PFBS PFHS PFOS

0 - 0.5 4.09 212 NR

0.5 - 1.0 5.27 118 2110

0.5 - 1.0 (DUP) 3.92 109 2880

SS03

Depth PFBS PFHS PFOS

0 - 0.5 2.61 5.59 506

0.5 - 1.0 0.966 2.03 179

SS04

Depth PFBS PFHS PFOS

0 - 0.5 22.5 288 10600

0.5 - 1.0 6.71 67.6 4040

SS05

Depth PFBS PFHS PFOS

0 - 0.5 1.27 2.61 331

0.5 - 1.0 0.433 0.975 132

0.5 - 1.0 (DUP) 0.533 1.17 164

SS06

Depth PFBS PFHS PFOS

0 - 0.5 11.6 59.6 747

0.5 - 1.0 9.20 66.3 3140

SS07

Depth PFBS PFHS PFOS

0 - 0.5 1.67 4.80 53.9

0 - 0.5 (DUP) 1.42 4.01 46.5

0.5 - 1.0 1.61 1.70 26.2

SS08

Depth PFBS PFHS PFOS

0 - 0.5 1.53 7.02 635

0.5 - 1.0 1.44 4.53 416

SS09

Depth PFBS PFHS PFOS

0 - 0.5 5.73 5.99 366

0.5 - 1.0 3.86 4.92 125

2.0 - 2.5 3.55 10.0 292

6.0 - 6.5 2.11 3.11 29.0

GP01

Depth PFBS PFHS PFOS

0 - 0.5 1.37 0.175 66.3

0.5 - 1.0 0.701 < 0.200 76.7

2.0 - 2.5 0.345 0.113 195

2.0 - 2.5 (DUP) 0.392 < 0.200 173

12.0 - 12.5 2.59 1.58 5.48

GP02

Depth PFBS PFHS PFOS

0 - 0.5 5.71 41.8 700

0.5 - 1.0 32.6 252 2070

2.0 - 2.5 40.1 321 1450

2.0 - 2.5 (DUP) 49.0 417 1240

5.0 - 5.5 12.8 82.2 352

GP03

Depth PFBS PFHS PFOS

0 - 0.5 4.51 3.32 840

0.5 - 1.0 2.16 1.55 513

2.0 - 2.5 1.72 4.83 99.2

5.0 - 5.5 2.78 12.8 33.2

GP04

Depth PFBS PFHS PFOS

0 - 0.5 12.3 8.82 346

0.5 - 1.0 5.29 12.7 381

2.0 - 2.5 1.75 7.95 429

5.5 - 6.0 5.11 48.6 1080

GP05

Depth PFBS PFHS PFOS

0 - 0.5 1.86 4.09 209

0.5 - 1.0 0.801 2.79 447

2.0 - 2.5 0.180 1.46 136

11.0 - 11.5 0.858 1.86 41.4

GP06

Depth PFBS PFHS PFOS

0 - 0.5 1.69 17.7 599

0.5 - 1.0 0.991 34.7 3680

2.0 - 2.5 1.22 25.3 1870

13.0 - 13.5 12.7 146 14000

GP07

Depth PFBS PFHS PFOS

0 - 0.5 NR NR 5160

0.5 - 1.0 0.320 11.3 770

0.5 - 1.0 (DUP) 0.397 13.7 1010

2.0 - 2.5 0.231 7.32 322

5.0 - 5.5 0.693 10.7 337

GP08

Depth PFBS PFHS PFOS

0 - 0.5 17.8 244 3630

0.5 - 1.0 4.71 43.1 1630

0.5 - 1.0 (DUP) 5.73 64.6 2280

2.0 - 2.5 1.37 5.23 331

5.0 - 5.5 3.83 6.26 64.3

GP09

Depth PFBS PFHS PFOS

0 - 0.5 28.4 141 734

0.5 - 1.0 46.5 229 581

2.0 - 2.5 99.8 162 297

6.0 - 6.5 76.6 126 139

GP10

Depth PFBS PFHS PFOS

0 - 0.5 3.57 20.9 157

0.5 - 1.0 6.29 45.0 123

2.0 - 2.5 23.8 30.7 242

6.5 - 7.0 5.68 33.2 290

6.5 - 7.0 (DUP) 7.68 55.0 579

GP11

Depth PFBS PFHS PFOS

0 - 0.5 0.607 4.77 666

0.5 - 1.0 0.521 2.75 407

2.0 - 2.5 1.88 6.81 460

17.0 - 17.5 2.01 9.74 59.1

GP12
"/

"/

SS22 &<

SS24

SS24

"/

"/

SS22 &<

SS24

SS24

Figure 3-27

Additional Avenue A 

Groundwater Average 

PFBS, PFHS and PFOS

Concentrations μ January 2011

550 275 0 Feet

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\AveA_gw_jan2011.mxd, 8/21/2014 1:47:32 PM, ricksc

Imagery Source:

ESRI, i-cubed, USDA FSA, USGS, AEX, 

GeoEye, Getmapping, Aerogrid, IGP. 2010

Avenue A Ditch

Note:

-Average sulfonate concentrations are the average of primary and

 duplicate sample analytical results in ng/mL (ppb).

Legend

"/ Soil Sampling/Groundwater 

Sampling Locations

&< Monitoring Well Location

Avenue A Ditch and Tributaries

State Docks Road

PFBS PFHS PFOS

43.2 309 539

210R

PFBS PFHS PFOS

19.2 143 500

SS24

PFBS PFHS PFOS

3.39 1.84 8.62

SS22
!( !(!(

!(!(

!(!(!(

!(

!( !(

!(

!(

!( #*

#*

#*

"/

!( #*

!( "/

!( !( #*

#*

Tennessee River

Finley Island Road

State Docks Road

SD19

SD20

SD23

SS28

SS27

SS22

SS21

SS24

SD21 SD26 SD22

SS25

SS30

SS29

SS19

SS12

SS20

SS18

SS17

SS14

SS15

SS13

SS16

SS10

SS11

SD18

0

μ250 500

Feet

3M Decatur, AL Facility

Figure 3-28

Avenue A Soil and Sediment

Average

 PFBS, PFHS and PFOS

Concentrations

January 2011

File: Y:\3MDec\MXD\Sulfonate\2013\AvenueA_soil_sed_Jan2011.mxd, 8/21/2014 1:48:19 PM, ricksc

Imagery Source:

ESRI, i-cubed, USDA FSA, USGS, AEX, 

GeoEye, Getmapping, Aerogrid, IGP. 2010

Note:

Average sulfonate concentrations based on 

primary and duplicate results in ng/g (ppb) 

on a dry weight basis.

Legend

#* Sediment Sampling Locations

!( Soil Sampling Locations

"/ Soil Sampling/Groundwater 

Sampling Locations

Notes:

- Average PFBS, PFHS and PFOS

 is the average of primary and duplicate sample 

 analytical results on a dry/weight basis

- NR = Result not reported because LMS recovery 

 result was outside of 100 + 50% reporting limits.

- Dup = Duplicate sample.

Depth PFBS PFHS PFOS

0 - 0.5 9.70 107 1000

0.5 - 1 7.57 78.6 545

1.5 - 2 5.77 47.8 NR

SD18

Depth PFBS PFHS PFOS

0 - 0.5 12.9 119 873

0.5 - 1 14.0 127 1080

1.5 - 2 8.50 75.7 345

SD19

Depth PFBS PFHS PFOS

0 - 0.5 10.3 160 2800

0.5 - 1 10.8 139 1300

1.5 - 2 9.68 121 672

SD20

Depth PFBS PFHS PFOS

0 - 0.5 7.86 107 2020

0.5 - 1 10.4 148 1650

1.5 - 2 5.46 57.7 562

SD21 Depth PFBS PFHS PFOS

0 - 0.5 13.9 193 4060

0.5 - 1 7.70 68.3 887

0.5 - 1 (DUP) 6.49 69.1 1120

1.5 - 2 8.19 62.8 473

SD22

Depth PFBS PFHS PFOS

0 - 0.5 4.97 44.6 518

0.5 - 1 2.42 22.5 270

1.5 - 2 2.08 16.1 176

SD23

Depth PFBS PFHS PFOS

0 - 0.5 5.28 29.1 3730

0.5 - 1 1.25 7.81 453

0.5 - 1 (DUP) 1.18 6.77 365

1.5 - 2 3.58 19.8 471

SS10

Depth PFBS PFHS PFOS

0 - 0.5 0.696 0.918 57.4

0.5 - 1 0.627 4.30 98.9

1.5 - 2 < 0.500 0.515 NR

SS11

Depth PFBS PFHS PFOS

0 - 0.5 1.17 13.7 2110

0.5 - 1 4.89 186 5830

1.5 - 2 10.7 294 2520

SS12

Depth PFBS PFHS PFOS

0 - 0.5 1.01 1.93 123

0.5 - 1 0.988 2.17 559

0.5 - 1 (DUP) 0.906 2.23 552

1.5 - 2 1.48 1.93 357

SS13

Depth PFBS PFHS PFOS

0 - 0.5 0.494 4.18 324

0.5 - 1 < 0.500 3.12 271

1.5 - 2 < 0.500 2.93 223

SS14

Depth PFBS PFHS PFOS

0 - 0.5 0.283 3.49 272

0.5 - 1 0.154 1.26 170

1.5 - 2 0.269 3.85 109

SS15

Depth PFBS PFHS PFOS

0 - 0.5 7.24 6.74 312

0 - 0.5 (DUP) 7.54 6.48 300

0.5 - 1 2.39 2.61 303

1.5 - 2 7.00 5.48 165

SS16

Depth PFBS PFHS PFOS

0 - 0.5 0.228 2.13 61.2

0.5 - 1 0.226 3.06 220

1.5 - 2 0.886 1.97 221

SS17

Depth PFBS PFHS PFOS

0 - 0.5 0.814 2.33 78.9

0.5 - 1 < 0.500 0.597 30.8

1.5 - 2 0.246 1.63 156

SS18

Depth PFBS PFHS PFOS

0 - 0.5 0.224 2.22 NR

0.5 - 1 1.30 14.6 397

1.5 - 2 1.84 23.6 294

SS19

Depth PFBS PFHS PFOS

0 - 0.5 0.309 2.68 102

0 - 0.5 (DUP) 0.247 2.27 107

0.5 - 1 0.299 1.70 29.4

1.5 - 2 0.483 2.38 206

SS20

Depth PFBS PFHS PFOS

0 - 0.5 0.823 14.0 1130

0.5 - 1 0.367 13.4 325

1.5 - 2 1.95 13.0 121

SS21

Depth PFBS PFHS PFOS

0 - 0.5 1.39 4.40 273

0.5 - 1 1.41 2.47 157

0.5 - 1 (DUP) 1.45 2.29 151

1.5 - 2 0.523 0.864 27.3

SS22

Depth PFBS PFHS PFOS

0 - 0.5 6.14 61.3 1320

0.5 - 1 8.80 61.0 974

1.5 - 2 3.17 34.2 1600

SS24

Depth PFBS PFHS PFOS

0 - 0.5 19.7 607 3320

0.5 - 1 33.8 516 2520

1.5 - 2 35.0 295 2020

SS25

Depth PFBS PFHS PFOS

0 - 0.5 0.552 8.26 970

0 - 0.5 (DUP) 0.666 9.95 NR

0.5 - 1 1.03 17.7 1140

1.5 - 2 2.87 62.4 1040

SS26

Depth PFBS PFHS PFOS

0 - 0.5 0.744 0.341 145

0.5 - 1 0.652 0.471 241

1.5 - 2 0.412 0.415 162

SS27

Depth PFBS PFHS PFOS

0 - 0.5 0.837 0.888 163

0.5 - 1 0.633 0.879 197

0.5 - 1 (DUP) 0.604 0.804 196

1.5 - 2 2.29 4.31 174

SS28

Depth PFBS PFHS PFOS

0 - 0.5 1.67 9.64 605

0.5 - 1 0.760 3.64 271

1.5 - 2 6.30 43.3 1070

SS29

Depth PFBS PFHS PFOS

0 - 0.5 0.548 3.83 437

0.5 - 1 < 0.500 0.869 130

1.5 - 2 1.22 8.06 309

SS30
&<

&<

&<

Field 6

DF603

DF602

DF601

&<

&<

&<

Field 6

DF603

DF602

DF601

Figure 3-29

Area Adjacent to Field 6

Soil PFBS, PFHS andPFOS Concentrations

December 2012

Decatur, AL

File: Y:\3MDec\MXD\Sulfonate\2013\DF601_602_603_PFBS_PFHS.mxd, 8/21/2014 1:52:05 PM, ricksc

μ

200 100 Feet 0 Legend

&< Soil Boring Location

3M Decatur Facility

Imagery: ESRI Bing Mapping Service

Note:

-Average sulfonate concentrations are the averages of primary

and duplicate sample analytical results in ng/g (ppb; dry weight basis).

DF601 PFBS PFHS PFOS

0 - 0.5 ft NR 33.3 3890

5 - 5.5 ft 1.67 5.04 229

DF602 PFBS PFHS PFOS

0 - 0.5 ft 0.373 3.56 851

5 - 5.5 ft 64.8 270 1730

DF603 PFBS PFHS PFOS

0 - 0.5 ft 0.423 NR 112

5 - 5.5 ft 2.43 6.58 3.86
#0

#0#0

#0

#0 #0

#0

WT-01

ET-02

ET-03

ET-04

ET-05

DC-01

Dry Creek

Eastern Tributary

Western Tributary

Mallard Creek

Mouth

Mallard Creek

ET-01

#0

#0#0

#0

#0 #0

#0

WT-01

ET-02

ET-03

ET-04

ET-05

DC-01

Dry Creek

Eastern Tributary

Western Tributary

Mallard Creek

Mouth

Mallard Creek

ET-01

Figure 3-30

Browns Ferry Road Site

Surface Water

Average PFBS, PFHS and PFOS Concentrations

February 2012 - August 2013

Decatur, AL

μ

File: Y:\3MDec\MXD\Sulfonate\2013\Browns_Ferry_Road_Site_Feb2012_Aug2013.mxd, 9/12/2014 10:16:58 AM, ricksc

0 1,300 2,600 5,200 Feet

Legend

Property Line

Drainage Features

#0 Surface Water Samplng Locations

Imagery Source: ESRI, Bing Mapping Service

Note:

PFBS, PFHS and PFOS concentrations are the

averages of primary and duplicate sample 

analytical results in ng/mL (ppb) in surface

water and ng/g (ppb) dry weight in sediment.

NS Not Sampled

Date PFBS PFHS PFOS

Feb. 2012 0.0354 <0.0250 0.0302

Oct. 2012 NS NS NS

Aug. 2013 NS NS NS

ET01

Date PFBS PFHS PFOS

Feb. 2012 <0.0250 <0.0250 0.0627

Oct. 2012 <0.0250 <0.0250 <0.0250

Aug. 2013 0.0350 <0.0250 0.0546

ET02

Date PFBS PFHS PFOS

Feb. 2012 <0.0250 <0.0250 0.303

Oct. 2012 <0.0250 <0.0250 0.230

Aug. 2013 0.0563 0.0806 0.278

ET03

Date PFBS PFHS PFOS

Feb. 2012 <0.0250 <0.0250 4.30

Oct. 2012 0.0513 0.0364 0.200

Aug. 2013 0.0362 <0.0250 0.109

ET04

Date PFBS PFHS PFOS

Feb. 2012 NS NS NS

Oct. 2012 <0.0250 0.0748 0.155

Aug. 2013 NS NS NS

ET05

Date PFBS PFHS PFOS

Feb. 2012 NS NS NS

Oct. 2012 <0.0250 0.0733 <0.0250

Aug. 2013 NS NS NS

WT01

Date PFBS PFHS PFOS

Feb. 2012 NS NS NS

Oct. 2012 0.115 0.232 1.54

Aug. 2013 NS NS NS

DC01
#0

#0#0

#0

#0

C o u n ty R d 3 8 7

ET-02

ET-03

ET-04

Dry Creek

Eastern Tributary

Western Tributary

Mallard Creek

Mouth

Mallard Creek

#0

#0#0

#0

#0

C o u n ty R d 3 8 7

ET-02

ET-03

ET-04

Dry Creek

Eastern Tributary

Western Tributary

Mallard Creek

Mouth

Mallard Creek

Figure 3-31

Browns Ferry Road Site

Sediment PFBS, PFHS and PFOS Concentrations

February 2012

Decatur, AL

μ

File: Y:\3MDec\MXD\Sulfonate\2013\Browns_Ferry_Road_Site_Sediment_Oct2012.mxd, 8/21/2014 1:55:01 PM, ricksc

0 1,300 2,600 5,200 Feet

Legend

Property Line

Drainage Features

#0 Surface Water Samplng Locations

Imagery Source: ESRI, Bing Mapping Service

Notes:

PFBS, PFHS and PFOS concentrations are the

averages of primary and duplicate sample 

analytical results in ng/mL (ppb).

Duplicate sample results provided in 

parentheses

NS Not Sampled

PFBS PFHS PFOS

3.95 <0.500 <0.500

ET01

PFBS PFHS PFOS

8.59 (10.0) <0.500 (<0.500) <0.500 (<0.500)

ET02

PFBS PFHS PFOS

12.1 <0.500 <0.500

ET03

PFBS PFHS PFOS

23.8 <0.500 <0.500

ET04
J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014

SECTION 3

TABLES
Table 3-1

On-Site FSIA PFBS, PFHS and PFOS Surface Soil Concentrations

March 2010

3M Decatur, AL Facility

Sample Depth Average PFBS Average PFHS Average PFOS

(ft bgs) (ng/g; ppb) (ng/g; ppb) (ng/g; ppb)

0.0 - 0.5 0.187 0.161 35.8

1.0 - 1.5 ND (ND) ND (ND) 48.4 (42.1)

0.0 - 0.5 ND 0.357 49.4

1.0 - 1.5 ND 0.467 4.74

0.0 - 0.5 ND 0.156 101

1.0 - 1.5 ND ND 59.8

0.0 - 0.5 ND 0.283 410

1.0 - 1.5 ND 0.164 88.4

0.0 - 0.5 ND 2.16 1080

1.0 - 1.5 ND 1.27 237

0.0 - 0.5 0.156 0.681 159

1.0 - 1.5 0.222 1.39 356

0.0 - 0.5 ND 0.563 121

1.0 - 1.5 ND 0.345 91.8

0.0 - 0.5 2.17 11.2 874

1.0 - 1.5 1.33 (1.38) 10.4 (10.5) 1550 (1530)

0.0 - 0.5 ND 0.290 242

1.0 - 1.5 ND 0.333 302

0.0 - 0.5 0.198 1.48 276

1.0 - 1.5 6.62 27.1 508

0.0 - 0.5 0.919 10.0 1500

1.0 - 1.5 0.227 (0.185) 3.21 (2.98) 1140 (1360)

0.0 - 0.5 0.326 4.62 1050

1.0 - 1.5 0.139 2.01 659

0.0 - 0.5 4.26 86.8 18900

1.0 - 1.5 ND 1.95 4960

Notes:

ft bgs = feet below ground surface

ng/g = nanograms per gram

ppb = parts per billion

Duplicate samples results in parentheses.

ND = Not Detected <0.200 ng/g

SS04

SS07

SS06

SS03

SS02

SS01

SS10

SS09

SS08

Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results on a dry 

weight basis.

Sample ID

Field 5

Field 8C

Field 11

SS07

SS06

SS05

SS05

J:\3M‐DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\

Table_3‐1_SS_March_April_10_(FSIA).xls Page 1 of 1
Table 3-2 

PFBS, PFHS and PFOS Results for Wetlands Edge Environmental Center Soils and Sediments

June 2010

3M Decatur, AL Facility

Location ID Average PFBS 

(ng/g; ppb)

Average PFHS 

(ng/g; ppb)

Average PFOS 

(ng/g; ppb)

WESA1 0.471 3.99 605

WESA2 0.569 3.50 537

WESA3 0.471 3.53 535

WESB1 0.480 2.34 189

WESB2 0.391 3.24 377

WESB3 0.391 2.96 391

WESB4 0.374 3.21 502

WESB4 DUP 0.400 3.11 471

WESB5 0.509 5.30 616

WESC1 ND 3.62 682

WESC2 0.294 3.32 573

WESC3 0.239 3.29 774

WESC4 0.233 1.81 292

WESD1 0.174 0.932 131

WESD2 0.379 1.92 336

WESD2 DUP 0.365 1.88 363

WESD3 0.639 4.01 584

WEU01 0.928 1.62 126

WEU02 ND 0.587 116

WEU03 0.858 2.34 223

WEU04 0.789 1.82 248

WEU05 1.30 4.62 775

WEU06 0.249 1.52 543

WEU07 0.690 3.04 479

WEU08 1.26 1.77 128

WEU09 0.740 1.45 198

WEU09 DUP 0.787 1.56 203

WEU10 0.379 0.400 57.0

Notes:

Average PFBS, PFHS, and PFOS is the average of primary and duplicate sample analytical results on a dry weight basis.

ND = Not Dectected < 0.200 ng/g

DUP = Duplicate sample.

Sampling Location Notes:

WESA - Wetlands Edge Sediment Transect A

WESB - Wetlands Edge Sediment Transect B

WESC - Wetlands Edge Sediment Transect C

WESD - Wetlands Edge Sediment Transect D

WEU - Wetlands Edge Upland Sampling Location

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\

Table_3-2_Wetlands_Edge_SED_PFBS PFHS PFOS.xlsx Page 1 of 1
Table 3-3

PFBS, PFHS and PFOS Results for Off-Site Monitoring Wells Soil Boring Samples 

October 2010 - August 2011

3M Decatur, AL Facility

Well ID Sample ID Sample Date Sample Depths 

(ft bgs)

Average 

PFBS 

(ng/g; ppb)

Average 

PFHS 

(ng/g; ppb)

Average 

PFOS 

(ng/g; ppb)

MW-47 DAL SS BPMW47 0 0000 July 2011 0 - 0.5 0.239 < 0.200 10.2

MW-121 DAL SS BPMW121 0 0000 July 2011 0 - 0.5 0.343 < 0.200 10.1

 DAL SS 607R 0 0000 October 2010 0 - 1 0.480 < 0.200 14.7

 DAL SS 607R 0 0010 October 2010 1 - 2 < 0.500 < 0.200 20.0

 DAL SS 607R DB 0010 October 2010 1 - 2 < 0.500 < 0.200 23.0

 DAL SS 607R 0 0040 October 2010 4 - 5 < 0.500 < 0.200 4.61

 DAL SS 607R 0 0270 October 2010 27 - 28 < 0.500 < 0.200 < 0.200

 DAL SS 609R 0 0000 October 2010 0 - 1 0.517 0.195 24.0

 DAL SS 609R 0 0010 October 2010 1 - 2 < 0.500 < 0.200 9.08

 DAL SS 609R 0 0040 October 2010 4 - 5 < 0.500 < 0.200 1.07

 DAL SS 609R 0 0110 October 2010 11 - 12 < 0.500 < 0.200 < 0.200

DAL SB 610S 0 0000 August 2011 0 - 1 0.991 0.586 36.1

DAL SB 610S 0 0010 August 2011 1 - 2 0.439 0.690 19.5

DAL SB 610S 0 0040 August 2011 4 - 5 0.572 1.11 3.00

DAL SB 610S 0 0150 August 2011 15 - 17 < 0.200 < 0.200 < 0.200

 DAL SS 611R 0 0000 October 2010 0 - 1 0.417 < 0.200 21.8

 DAL SS 611R 0 0010 October 2010 1 - 2 0.548 0.658 14.6

 DAL SS 611R 0 0040 October 2010 4 - 5 < 0.500 < 0.200 4.67

 DAL SS 611R 0 0050 October 2010 5 - 6 < 0.500 < 0.200 2.73

Notes:

Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results on a dry weight basis.

ng/g = nanograms per billion

ppb = parts per billion

ft bgs = feet below ground surface

Samples labeled as 607R were collected from a well boring terminated in epikarst and designated 607S.

610S

607R

609R

611R

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\

Table_3-3_Offsite_Phase3_SS_PFBS PFHS PFOS.xlsx Page 1 of 1
Table 3-4

On-Site Groundwater Monitoring Wells 

3M Decatur, AL Facility

Well Type Location Installation Date

220R Residuum Closed Landfill July 2001

220L Bedrock Closed Landfill August 2001

226R Residuum Closed Landfill July 2002

226L Bedrock Closed Landfill August 2002

310R Residuum Chemical Plant Existing (pre-1994)

317L Bedrock Chemical Plant Existing (pre-1994)

320L Bedrock Closed Landfill Existing (pre-1994)

327R Residuum Chemical Plant August 2001

130R Residuum FSIA Field 9 December 2004

130S Epikarst FSIA Field 9 November 2004

130L Bedrock FSIA Field 9 November 2004

131R Residuum FSIA Field 9 December 2004

131S Epikarst FSIA Field 9 December 2004

131L Bedrock FSIA Field 9 November 2004

132R Residuum FSIA Field 6 December 2004

132S Epikarst FSIA Field 6 November 2004

132L Bedrock FSIA Field 6 November 2004

133R Residuum FSIA Field 6 December 2004

133S Epikarst FSIA Field 6 December 2004

133L Bedrock FSIA Field 6 December 2004

134R Residuum FSIA Field 8b December 2004

134S Epikarst FSIA Field 8b November 2004

134L Bedrock FSIA Field 8b November 2004

135R Residuum FSIA Field 8b December 2004

135S Epikarst FSIA Field 8b December 2004

135L Bedrock FSIA Field 8b December 2004

136R Residuum FSIA Field 14 December 2004

136S Epikarst FSIA Field 14 November 2004

136L Bedrock FSIA Field 14 November 2004

137R Residuum FSIA Field 14 December 2004

137S Epikarst FSIA Field 14 November 2004

137L Bedrock FSIA Field 14 November 2004

138R Residuum FSIA Field 11 March 2006

138S Epikarst FSIA Field 11 March 2006

138L Bedrock FSIA Field 11 March 2006

Notes:

FSIA = Former Sludge Incorporation Area

Phase 1 On-Site Groundwater Monitoring Wells

Phase 2 On-Site Groundwater Monitoring Wells

The 138 series groundwater monitoring wells were installed on-site adjacent to the eastern property boundary to provide data on 

groundwater flowing off-site in an easterly direction.

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\

Table_3-4_Decatur Wells.xlsx Page 1 of 1
Table 3-5

On-Site Chemical Plant and Closed Landfill Wells PFBS Analytical Results

2010 - 2013

3M Decatur, AL Facility

1Q10 3Q10 1Q11 3Q11 1Q12 3Q12 1Q13 

Well ID March 29 - April 8, 2010 September 20 - 30, 2010 March 21 - 28, 2011 September 19 - 26, 2011 March 14 - 28, 2012 September 12 - 20, 2012 March 21-28, 2013 

203L 61.9 70.6 105 23.2 30.8 40.2 35.6 

220R 7.46 10.0 8.41 4.76 6.90 6.77 7.01 

220L 11.1 7.85 11.5 7.87 8.52 7.79 7.94 

222R 129 126 97.6 62.5 64.5 33.6 42.3 

227R 23.8 16.7 19.6 13.4 14.8 14.2 16.8 

227L 342 376 292 256 220 296 201 

310R 386 451 840 730 986 1010 1190 

317L 0.534 0.324 0.0246 <0.0400 <0.0250 <0.0400 < 0.0400 324L 95.7 89.3 112 70.0 82.1 73.0 71.7 

328R 36.0 31.8 39.0 27.9 31.0 32.6 32.3 

328L 76.8 63.1 71.9 40.3 47.9 41.6 45.1 

330R 4470 2780 3020 3070 2120 1910 1600 

330L 504 636 545 530 397 388 547 

335R NS NS 1080 1080 864 1280 1380 

RW312R 1220 1420 1190 1140 740 699 1120 RW327R 75.8 126 93.3 51.6 62.1 65.7 64.5 

RW331S 349 925 558 525 997 1290 842 

GRS04 1930 2410 2020 1690 2300 2240 2060 

Notes:

On-site chemical plant and closed landfill wells are sampled during the first and third quarter groundwater sampling events.Average PFBS is the average of primary and duplicate sample analytical results.GRS04 is a composite sample from multiple extraction wells.335R inadvertently identified as 335S on chain of custody in March 2011.NS - Not SampledWell ID suffixes: R = residuum S = epikarst L = bedrockng/mg = nanograms per milligramppb = parts per billion

Average PFBS (ng/mL; ppb)

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Table 3-6

On-Site Chemical Plant and Closed Landfill Wells PFHS Analytical Results 

2010-2013

3M Decatur, AL Facility

1Q10 3Q10 1Q11 3Q11 1Q12 3Q12 1Q13 

Well ID March 29 - April 8, 2010 September 20 - 30, 2010 March 21 - 28, 2011 September 19 - 26, 2011 March 14 - 28, 2012 September 12 - 20, 2012 March 21-28, 2013 

203L 360 481 595 142 202 257 237 

220R 32.0 48.7 34.3 17.9 29.8 28.7 31.3 

220L 53.0 41.9 52.0 37.6 41.4 39.8 36.9 

222R 845 872 607 429 407 223 252 

227R 169 97.5 106 61.7 86.3 47.3 71 

227L 63.7 255 62.2 68.5 40.1 150 37.2 

310R 424 453 485 320 328 324 284 

317L 0.691 0.237 0.119 0.0984 0.0877 0.0472 0.0864 324L 101 110 111 82.5 88.4 63.0 72.3 

328R 67.7 68.0 63.1 57.9 57.0 54.9 50.5 

328L 25.9 23.6 22.3 18.4 18.7 18.3 16.8 

330R 258 330 259 196 185 197 152 

330L 403 476 625 434 359 300 294 

335R NS NS 2030 1420 1600 1580 1570 

RW312R 946 842 629 831 494 461 488 RW327R 154 229 168 126 146 156 140 

RW331S 426 611 292 331 473 409 295 

GRS04 6190 7630 5360 6060 8280 8410 6820 

Notes:On-site chemical plant and closed landfill wells are sampled during the first and third quarter groundwater sampling events.Average PFHS is the average of primary and duplicate sample analytical results.GRS04 is a composite sample from multiple extraction wells.335R inadvertently identified as 335S on chain of custody in March 2011.NS - Not SampledWell ID suffixes: R = residuum S = epikarst L = bedrockng/mL = nanograms per milliliterppb = parts per billion

Average PFHS (ng/mL; ppb)

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Table 3-7

On-Site Chemical Plant and Closed Landfill Wells PFOS Analytical Results

2010-2013

3M Decatur, AL Facility

1Q10 3Q10 1Q11 3Q11 1Q12 3Q12 1Q13 

Well ID March 29 - April 8, 2010 September 20 - 30, 2010 March 21 - 28, 2011 September 19 - 26, 2011 March 14 - 28, 2012 September 12 - 20, 2012 March 21-28, 2013 

203L 852 836 861 478 666 630 778 

220R 46.0 70.2 51.5 27.4 33.0 50.4 60.9 

220L 63.6 64.6 83.5 49.2 49.5 66.5 65.2 

222R 974 1230 781 511 351 403 414 227R 956 852 740 578 616 485 576 

227L 287 5060 363 474 220 1840 241 

310R 760 895 1020 611 671 644 644 

317L 2.44 <0.500 0.250 0.205 0.230 0.0534 0.181 

324L 203 257 316 211 194 102 208 

328R 146 168 217 178 144 147 180 

328L 14.5 0.686 1.33 1.29 1.14 0.819 6.1 

330R 759 802 720 593 462 604 523 

330L 145 172 223 169 146 190 182 

335R NS NS 6010 3350 3600 4560 4890 

RW312R 1750 1510 1010 1440 992 928 774 

RW327R 639 675 617 397 345 467 346 

RW331S 922 1180 642 506 850 816 642 

GRS04 1400 1370 NR 1330 NR 2100 3090 

Notes:

On-site chemical plant and closed landfill wells are sampled during the first and third quarter groundwater sampling events.Average PFOS is the average of primary and duplicate sample analytical results.GRS04 is a composite sample from multiple extraction wells.335R inadvertently identified as 335S on chain of custody in March 2011.NS = Not SampledNR - Not reported due to quality control issuesWell ID suffixes: R = residuum S = epikarst L = bedrockng/g = nanograms per gramppb = parts per billion

Average PFOS (ng/mL; ppb)

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Table 3-8

On-Site FSIA Monitoring Wells PFBS Analytical Results

2010 - 2014

3M Decatur, AL Facility

2Q10 4Q10 2Q11 4Q11 1Q12 4Q12 2

Well ID June 21 - July 2, 2010 November 11 - 17, 2010 June 22 - 30, 2011 December 8 - 14, 2011 March 27 - April 3, 2012 November 30 - December 5, 2012 June 21 - 

130R 16.6 16.6 16.3 15.1 14.6 14.2 1

130S 3.57 3.50 3.53 3.27 3.54 3.09 3

130L 1.53 1.77 1.67 1.49 1.53 1.37 1

131R 75.1 81.2 54.9 36.6 40.2 36.7 5

131S 1.06 0.785 0.894 0.688 0.860 0.821 0

131L 2.94 3.35 3.42 2.86 3.13 2.68 3

132R 7.64 8.03 NS NS NS NS 

132S 32.6 25.9 NS NS NS NS 

132L 10.0 8.89 NS NS NS NS 

133R 7.70 4.61 4.79 2.94 3.04 3.01 2

133S 12.7 14.0 9.08 11.3 8.57 11.3 9

133L 6.75 7.65 6.67 7.90 5.87 8.87 1

134R 59.1 56.2 51.4 47.5 55.9 38.4 4

134S 0.0938 0.143 0.258 0.364 0.428 0.409 0

134L 12.8 11.9 11.8 10.5 9.80 8.88 9

135R 83.0 81.0 74.3 64.4 67.3 68.7 6

135S 0.735 0.799 1.21 0.991 2.17 1.05 1

135L 6.36 5.73 9.69 7.09 10.9 7.04 1

136R NS[D] NS[D] NS[D] NS[D] NS[D] NS[D] N

136S 3.49 2.55 3.69 1.77 2.58 2.53 2

136L 2.91 2.53 2.33 1.91 2.32 2.24 2

137R NS[D] NS[D] NS[D] NS[D] NS[D] NS[D] N

137S 0.119 0.102 0.107 0.120 0.109 0.294 0

137L 0.0847 0.0823 0.0826 0.0868 0.0679 0.0764 0.

138R NS[D] NS[D] 8.01 7.40 NS[D] NS[D] N

138S 5.72 4.69 4.57 3.64 5.38 4.81 4

138L 0.0463 0.0473 0.0391 <0.0250 <0.0250 <0.0250 0.

140R NC 1.63 1.59 1.27 1.59 1.45 N

141R NC 0.0431 0.0431 0.0342 0.0369 0.0516 0.

142R NC 1.68 1.69 1.77 2.08 1.63 2

143R NC NS[D] 1.66 0.715 1.56 NS 1

144S NC 1.95 1.66 2.02 1.99 NS 145S NC NC NC NC 1.50 1.59 1

CW26R* NS[NA] 8.27 8.23 NS[NA] NS[NA] 4.72 7

CW26L NS[NA] 12.9 13.5 NS[NA] NS[NA] 11.8 1

Notes:On-site FSIA landfill wells are sampled during the second and fourth quarter groundwater sampling events. Well ID suffixes:Average PFBS is the average of primary and duplicate sample analytical results. R = residuum*Some analytical reports designate CW26R as CW26C. S = epikarstSome analytical reports designate 144 and 145 incorrectly, wells were terminated in the epikarst and are S wells. L = bedrock

NS - Not SampledNS[D] - Not Sampled - DryNS[NA] - Not Sampled - Not AccessibleNC - Not Constructed

Average PFBS (ng/mL; ppb)

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Table 3-9

On-Site FSIA Monitoring Wells PFHS Analytical Results

2010 - 2014

3M Decatur, AL Facility

2Q10 4Q10 2Q11 4Q11 1Q12 4Q12 2Q

Well ID June 21 - July 2, 2010 November 11 - 17, 2010 June 22 - 30, 2011 December 8 - 14, 2011 March 27 - April 3, 2012 November 30 - December 5, 2012 June 21 - J

130R 119 128 125 119 119 109 13

130S 12.1 31.3 29.8 25.6 31.0 27.4 3

130L 13.0 14.4 13.6 11.7 12.7 10.1 11

131R 345 413 304 182 234 210 32

131S 5.49 4.63 5.07 4.78 4.75 4.68 5.

131L 19.3 20.7 21.6 18.8 20.6 18.2 22

132R 36.0 52.8 NS NS NS NS N

132S 211 205 NS NS NS NS N

132L 78.2 77.2 NS NS NS NS N

133R 45.6 31.1 33.1 20.9 19.6 20.5 15

133S 77.1 91.5 67.2 79.7 61.6 74.6 71

133L 39.4 53.4 46.9 58.7 39.1 66.5 10

134R 441 503 483 561 556 358 48

134S 1.33 1.71 3.09 4.22 4.77 4.63 4.

134L 106 112 111 109 103 90.7 97

135R 754 839 844 827 765 720 73

135S 5.88 6.25 8.06 7.90 21.2 10.5 15

135L 37.9 35.9 71.0 47.6 79.4 49.7 12

136R NS[D] NS[D] NS[D] NS[D] NS[D] NS[D] NS

136S 19.3 16.5 25.8 11.4 17.7 18.8 19

136L 11.7 16.2 16.0 12.3 16.0 15.0 15

137R NS[D] NS[D] NS[D] NS[D] NS[D] NS[D] NS

137S <0.103 0.0914 0.0806 0.113 0.0922 0.203 0.0

137L <0.103 0.199 0.107 0.0992 0.0876 0.0918 0.0

138R NS[D] NS[D] 39.2 35.3 NS[D] NS[D] NS

138S 16.9 23.5 23.2 17.8 26.4 22.4 23

138L <0.103 0.144 0.113 0.0594 0.0649 0.0571 0.1

140R NC 17.2 17.8 14.1 17.7 15.5 NS

141R NC 0.258 0.296 0.254 0.303 0.339 0.3

142R NC 9.98 10.2 9.97 11.2 9.30 13143R NC NS[D] 6.06 2.33 5.69 NS 6.

144S NC 8.57 7.14 7.54 9.03 NS N145S NC NC NC NC 7.55 7.43 9.

CW26R* NS[NA] 63.1 67.8 NS[NA] NS[NA] 50.1 60

CW26L NS[NA] 92.9 105 NS[NA] NS[NA] 95.5 98

Notes:On-site FSIA landfill wells are sampled during the second and fourth quarter groundwater sampling events. Well ID suffixes:Average PFHS is the average of primary and duplicate sample analytical results. R = residuum*Some analytical reports designate CW26R as CW26C. S = epikarstSome analytical reports designate 144 and 145 incorrectly, wells were terminated in the epikarst and are S wells. L = bedrock

NS - Not SampledNS[D] - Not Sampled - DryNS[NA] - Not Sampled - Not AccessibleNC - Not Constructed

Average PFHS (ng/mL; ppb)

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Table 3-10

On-Site FSIA Monitoring Wells PFOS Analytical Results

2010 - 2014

3M Decatur, AL Facility

2Q10 4Q10 2Q11 4Q11 1Q12 4Q12 2Q

Well ID June 21 - July 2, 2010 November 11 - 17, 2010 June 22 - 30, 2011 December 8 - 14, 2011 March 27 - April 3, 2012 November 30 - December 5, 2012 June 21 - J

130R 532 583 450 467 405 541 56

130S 72.1 117 97.6 90.8 81 144 14

130L 74.4 82.7 63.7 66.3 50.7 70.9 70

131R 1720 1510 1510 1370 1120 1430 14

131S 8.25 5.55 5.37 4.56 5.8 7.48 5.

131L 33.6 34.3 32.4 27.9 27.3 39.7 43

132R 263 295 NS NS NS NS N

132S 861 633 NS NS NS NS N

132L 240 293 NS NS NS NS N

133R 77.5 60.8 42.6 39.1 21.2 44.2 29

133S 228 224 195 174 160 198 30

133L 144 204 146 252 70.1 443 73

134R 1180 1420 1060 1570 1030 943 12

134S 12.6 11.4 13.3 17.5 13.7 21.4 17

134L 491 579 493 436 328 484 52

135R 1040 892 969 1110 974 1100 11

135S 7.16 4.88 NR 5.81 13.5 8.06 11

135L 55.4 22.6 57.6 33.8 59.0 46.0 15

136R NS[D] NS[D] NS[D] NS[D] NS[D] NS[D] NS

136S 106 87.1 116 59.4 66.1 115 12

136L 89.7 79.2 69.0 64.4 60.9 92.2 93

137R NS[D] NS[D] NS[D] NS[D] NS[D] NS[D] NS

137S 0.427 0.315 0.483 0.517 0.355 1.01 0.5

137L 0.734 0.893 1.96 1.62 1.27 1.41 1.

138R NS[D] NS[D] 347 300 NS[D] NS[D] NS

138S 216 245 199 160 200 231 23

138L 0.791 0.581 0.851 0.420 0.396 0.380 0.6

140R NC 136 128 102 106 150 NS

141R NC 4.23 3.00 4.87 5.59 6.08 5.142R NC 108 85.5 94.4 55.4 105 16

143R NC NS[D] 23.8 15.6 13.7 NS 25

144S NC NR 29.0 26.7 13.4 NS N

145S NC NC NC NC 49.1 118 13

CW26R* NS[NA] 451 398 NS[NA] NS[NA] 384 41

CW26L NS[NA] 848 934 NS[NA] NS[NA] 910 94

Notes:On-site FSIA landfill wells are sampled during the second and fourth quarter groundwater sampling events. Well ID suffixes:Average PFOS is the average of primary and duplicate sample analytical results. R = residuum

*Some analytical reports designate CW26R as CW26C. S = epikarstSome analytical reports designate 144 and 145 incorrectly; wells were terminated in the epikarst and are S wells. L = bedrock

NS - Not SampledNS[D] - Not Sampled - DryNS[NA] - Not Sampled - Not AccessibleNC - Not ConstructedNR - Not reported due to quality control issues

Average PFOS (ng/mL; ppb)

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Table 3-11

On-Site Former Sludge Incorporation Area Pump Test

Groundwater PFBS, PFHS and PFOS Concentrations

June and December 2012

3M Decatur, AL Facility

Well ID Sample ID Date

Average PFBS 

(ng/mL; ppb)

Average PFHS 

(ng/mL; ppb)

Average PFOS 

(ng/mL; ppb)

144PZE1 DAL GW PZE1 120603 June 3, 2012 2.76 13.1 150

144PZE2 DAL GW PZE2 120603 June 3, 2012 3.62 17.0 179

145S DAL GW 144S 120604 June 4, 2012 1.90 8.22 63.9

145S DAL GW 144S 120605 June 5, 2012 1.28 5.79 55.1

145S DAL GW 144S 120606 June 6, 2012 1.23 5.69 57.6

145S DAL GW 144S 121204 December 4, 2012 1.59 7.43 118

Notes:

Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results.

144PZE is a piezometer in the vicinity of monitoring well cluster 144.

At 145S samples were collected at the beginning, middle and end of pump testing.

At 144PZE samples were collected at the beginning and end of pump testing.

Well ID suffix:

 S = epikarst

ng/mL = nanograms per milliliter

ppb = parts per billion

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Table 3-12

On-Site Wastewater Treatment Plant Groundwater Average PFBS, PFHS and PFOS 

Concentrations

April 2012

3M Decatur, AL Facility

Sample ID Well ID

Average PFBS 

(ng/mL; ppb)

Average PFHS 

(ng/mL; ppb)

Average PFOS 

(ng/mL; ppb)

DAL GW TW1R 120405 TW1R 33.8 57.3 29.0

DAL GW TW2R 120405 TW2R 117 579 1090

DAL GW TW3R 120405 TW3R 304 1310 3660

DAL GW TW4R 120405 TW4R 184 19.1 247

DAL GW TW5R 120405 TW5R 522 43.0 696

DAL GW TW6R 120405 TW6R 156 46.7 281

Notes:

Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results.

Temporary Well (TW) ID suffix:

 R = residuum

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Table 3-13 

On-Site Wastewater Treatment Plant Extraction Wells

Groundwater PFBS, PFHS and PFOS Concentrations

2012-2014

3M Decatur, AL Facility

WW8R WW9R WW10R WW11R WW8R WW9R WW10R WW11R WW8R WW9R W

575 233 - - 2610 1290 - - 5280 2620 489 248 - - 2280 1340 - - 4550 2610 453 254 - - 2070 1330 - - 4170 2550 

12/13/2012 441 321 - - 1740 1480 - - 4920 4080 

1/17/2012 410 184 - - 1930 954 - - 5710 3690 2/13/2013 354 236 - - 1900 1400 - - 4850 4100 3/27/2013 385 278 - - 1760 1440 - - 5120 4660 4/29/2013 364 244 - - 1610 1200 - - 4830 4340 5/31/2013 289 226 - - 1330 1120 - - 4180 4210 6/27/2013 282 225 - - 1340 1140 - - 4110 4150 7/23/2013 263 212 - - 1260 1030 - - 3910 3670 9/30/2013 303 249 247 299 1370 1220 1030 1000 4100 4200 

10/28/2013 312 286 264 240 1300 1280 1030 511 4410 4380 11/18/2013 362 305 303 287 1440 1340 1120 680 4750 4540 12/13/2013 316 259 239 198 1270 1170 885 512 4060 4190 

1/30/2014 326 317 250 168 1460 1460 757 362 3990 4800 2/27/2014 331 270 260 262 1370 1370 935 696 4170 4660 3/31/2014 357 341 278 254 1470 1550 1030 549 5790 5420 4/23/2014 283 257 243 212 1180 1120 885 527 3840 3820 5/15/2014 290 266 220 237 1160 1140 823 649 4230 4790 6/25/2014 285 274 240 250 1240 1270 948 760 4210 4470 

Notes:Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results.

Average PFOS (

Sample

Pump Test 

(June 2012)

Average PFBS (ng/mL; ppb) Average PFHS (ng/mL; ppb)

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Table 3-14

 Off-Site Monitoring Well Construction Data

3M Decatur, AL Facility 

601R Residuum BP Property Northwest 49 2-Inch SS

601S Epikarst BP Property Northwest 80.5 4-Inch SS

601L Bedrock BP Property Northwest 139 6-Inch OB

602R Residuum BP Property West 25 2-Inch SS

602S Epikarst BP Property West 40.5 4-Inch SS

602L Bedrock BP Property West 153 6-Inch OB

603R Residuum Goss Property Southwest 37.5 2-Inch SS

603S Epikarst Goss Property Southwest 48 4-Inch SS

603L Bedrock Goss Property Southwest 96 6-Inch OB

604R Residuum Davis Property South 22 2-Inch SS

604S Epikarst Davis Property South 41.5 4-Inch SS

604L Bedrock Davis Property South 55 6-Inch OB

605R Residuum Solutia Property East 19 2-Inch SS

605L Bedrock Solutia Property East 160 6-Inch OB

138R Residuum FSIA Field 11 East 20 2-Inch SS

138S Epikarst FSIA Field 11 East 33 4-Inch SS

138L Bedrock FSIA Field 11 East 78 6-Inch OB

MW-47 Residuum BP Property Northwest 54.82 4-Inch

MW-121 Bedrock BP Property Northwest 93.66 2-Inch

607S Epikarst Red Hat Road West 44.43 2-Inch

607L Bedrock Red Hat Road West 183 6-Inch

609R Residuum South of Bakers Creek South 19.29 2-Inch

609L Bedrock South of Bakers Creek South 56.15 6-Inch

610S Epikarst Ascend Property Southeast 41.0 2-Inch

610L Bedrock Ascend Property Southeast 55.0 6-Inch

611R Residuum East of Bakers Creek East 20.4 2-Inch

611L Bedrock East of Bakers Creek East 64.0 6-Inch

MW-13S Residuum Morgan County Landfill Southwest 24.3 4-inch

MW-13I Epikarst Morgan County Landfill Southwest 36.5 4-inch

MW-13B Bedrock Morgan County Landfill Southwest 61.9 2-inch

Notes:ft bgs = feet below ground surfaceft toc = feet below top-of-casingSS = stainless steelOB = open borehole

Phase 3 Off-Site Wells

Phase 2 Off-Site Wells

Well ID Monitored Zone Well Location Well Diameter Well Location in Proximity to Site Total Depth (ft bgs)

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Table 3-15

Phase 2 and Phase 3 Off-Site Groundwater PFBS Concentrations

October 2010 - April 2012

3M Decatur, AL Facility

Well ID October 2010 November 2010 July 2011 September 2011 March - Ap

MW-47 NS NS 0.188 NS 0.17

MW-121 NS NS <0.0250 NS <0.02

602S 0.239 NS NS NS 0.28

602L 0.0813 NS NS NS 0.06

603S 0.158 NS NS NS 0.17

603L 0.112 NS NS NS 0.09

604R NS NS NS NS 0.31

604S 0.303 NS NS NS 0.34

604L 0.279 NS NS NS 0.44

605R 0.119 NS NS NS 0.13

605L 0.406 NS NS NS 0.09

607R 0.0870 NS NS NS 0.18

607L 0.0615 NS NS NS 0.18

609R 0.480 NS NS NS 0.43

609L 0.259 NS NS NS 0.34

610S* NS NS NS 0.0527 0.05

610L NS NS NS 0.248 0.13

611R 0.191 NS NS NS 0.29

611L 0.317 NS NS NS 0.26

MW-13S 0.0957 0.0957 NS NS 0.08

MW-13I 0.0843 0.0843 NS NS 0.06

MW-13B 0.0987 0.0987 NS NS 0.08

Notes:Average PFBS is the average of primary and duplicate sample analytical results.* Some analytical reports designate 610S as 610RNS = Not SampledWell designations R = Residuum (shallow) S = Shallow (residuum) S = Epikarst I = Intermediate (epikarst) L = Limestone bedrock B = Bedrock

Average PFBS Concentration (ng/mL; ppb)

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Table 3-16

Phase 2 and Phase 3 Off-Site Groundwater PFHS Concentrations

October 2010 - April 2012

3M Decatur, AL Facility

Well ID October 2010 November 2010 July 2011 September 2011 March - Ap

MW-47 NS NS 0.138 NS 0.11

MW-121 NS NS <0.0250 NS <0.02

602S 0.127 NS NS NS 0.18

602L 0.291 NS NS NS 0.25

603S 0.122 NS NS NS 0.11

603L 0.109 NS NS NS 0.10

604R NS NS NS NS 0.18

604S 0.224 NS NS NS 0.22

604L 0.215 NS NS NS 0.22

605R 0.0661 NS NS NS 0.11

605L 0.622 NS NS NS 0.20

607R 0.0707 NS NS NS 0.19

607L 0.0823 NS NS NS 0.22

609R 0.154 NS NS NS 0.09

609L 0.477 NS NS NS 0.16

610S* NS NS NS 0.0832 0.07

610L NS NS NS 0.255 0.13

611R 0.0396 NS NS NS 0.12

611L 0.167 NS NS NS 0.14

MW-13S 0.0559 0.0559 NS NS 0.04

MW-13I 0.0526 0.0526 NS NS 0.04

MW-13B 0.0717 0.0717 NS NS 0.05

Notes:Average PFHS is the average of primary and duplicate sample analytical results.* Some analytical reports designate 610S as 610RNS = Not SampledWell designations R = Residuum (shallow) S = Shallow (residuum) S = Epikarst I = Intermediate (epikarst) L = Limestone bedrock B = Bedrock

Average PFHS Concentration (ng/mL; ppb)

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Table 3-17

Phase 2 and Phase 3 Off-Site Groundwater PFOS Concentrations

October 2010 - April 2012

3M Decatur, AL Facility

Well ID October 2010 November 2010 July 2011 September 2011 March - Ap

MW-47 NS NS 0.210 NS 0.16

MW-121 NS NS <0.0250 NS 0.03

602S 0.710 NS NS NS 0.46

602L 0.744 NS NS NS 0.54

603S 0.220 NS NS NS 0.41

603L 0.102 NS NS NS 0.09

604R NS NS NS NS 1.1

604S 0.472 NS NS NS 0.47

604L 1.46 NS NS NS 0.81

605R 0.0403 NS NS NS 0.05

605L 0.522 NS NS NS 0.21

607R 0.0611 NS NS NS 0.27

607L 0.0920 NS NS NS 0.32

609R 0.164 NS NS NS 0.16

609L 2.41 NS NS NS 0.56

610S* NS NS NS 0.153 0.27

610L NS NS NS 1.41 0.64

611R 0.580 NS NS NS 0.65

611L 0.933 NS NS NS 0.45

MW-13S <0.0250 <0.0250 NS NS <0.02

MW-13I <0.0250 <0.0250 NS NS <0.02

MW-13B <0.0250 <0.0250 NS NS 0.03

Notes:Average PFOS is the average of primary and duplicate sample analytical results.* Some analytical reports designate 610S as 610RNS = Not SampledWell designations R = Residuum (shallow) S = Shallow (residuum) S = Epikarst I = Intermediate (epikarst) L = Limestone bedrock B = Bedrock

Average PFOS Concentration (ng/mL; ppb)

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Table 3-18 

PFBS, PFHS and PFOS Concentrations in Morgan County Landfill Monitoring Wells

November 2010 and April 2012

3M Decatur, AL Facility

November 

2010 April 2012

November 

2010 April 2012

November 

2010 April 2012

MW1S 1.77 NS 2.23 NS 6.42 NS

MW1I 0.493 NS 0.966 NS 1.47 NS

MW1B 2.26 NS 3.28 NS 7.40 NS

MW2I 2.06 NS 1.38 NS 5.20 NS

MW2B 1.24 NS 1.38 NS 14.8 NS

MW3S <0.0250 NS <0.0250 NS 0.0306 NS

MW3I 0.0279 NS 0.0324 NS 0.262 NS

MW3B 0.0381 NS 0.0326 NS 0.283 NS

MW4S <0.0250 NS <0.0250 NS 0.256 NS

MW4I <0.0250 NS <0.0250 NS 0.144 NS

MW4B <0.0250 NS <0.0250 NS 0.0475 NS

MW13S(1) 0.0957 0.0831 0.0559 0.0404 <0.0250 <0.0232

MW13I(1) 0.0843 0.0682 0.0526 0.0457 <0.0250 <0.0232

MW13B(1) 0.0987 0.0803 0.0717 0.0521 <0.0250 0.0376

Notes:

Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results.

NS = Not Sampled

Well designations

 S = Shallow (residuum)

 I = Intermediate (epikarst)

 B = Bedrock

(1) upgradient monitoring well

Well ID

Average PFBS 

Concentration (ng/mL; ppb)

Average PFHS 

Concentration (ng/mL; ppb)

Average PFOS 

Concentration (ng/mL; ppb)

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3-18_MCL GW.xls

Page 1 of 1
Table 3-19 

BFI Morris Farm Landfill Groundwater PFBS, PFHS and PFOS Concentrations

March 2011

3M Decatur, AL Facility

Well ID Average PFBS 

(ng/mL; ppb)

Average PFHS 

(ng/mL; ppb)

Average PFOS

 (ng/mL; ppb)

MW01 < 0.0250 < 0.0250 < 0.0300

MW01D 0.194 0.0533 0.353 

MW02 0.194 0.467 1.42

MW02D 0.142 0.424 1.10 

MW03 < 0.0250 0.0667 0.209 

MW03D < 0.0250 < 0.0250 < 0.0300

MW04 1.67 12.8 22.5 

MW04D 0.171 0.342 0.184 

MW05 1.05 1.35 2.08

MW05D 0.0280 0.0323 < 0.0300

MW10(1) 0.0426 0.121 0.242 

MW10D(1) < 0.0250 0.0281 < 0.0300

MW13 4.13 1.27 8.28

MW13D 5.03 1.48 8.68

Notes:

Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results in ng/mL (ppb).

Well designations:

 MW-xx = Shallow (residuum) monitoring well

 MW-xxD = Deep (bedrock) monitoring well

(1) upgradient monitoring well

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Table_3-19_BFIMorrisLF_PFBS PFHS PFOS.xlsx Page 1 of 1
Table 3-20

Browns Ferry Road Site Groundwater PFBS, PFHS and PFOS Concentrations

April 2012, October 2012 and August 2013

3M Decatur, AL Facility

April 

2012

October 

2012

August 

2013

April 

2012

October 

2012

August 

2013

April 

2012

October 

2012

August 

2013

MW1R 0.113 0.108 0.109 0.861 0.751 0.872 1.61 1.41 1.69

MW3R 1.79 1.59 3.91 8.73 6.19 19.6 9.70 7.38 23.2

MW4R 0.189 0.186 0.648 4.88 3.70 16.5 5.81 5.24 23.4

MW4L 0.0772 0.0946 0.0935 0.205 0.231 0.254 0.348 0.526 0.540

MW5R 0.0402 <0.0250 0.0605 0.128 0.0671 0.138 0.128 0.102 0.089

MW5L 0.263 0.201 0.168 0.400 0.308 0.273 2.07 1.61 1.27

MW6R 0.334 0.175 0.25 1.06 0.493 0.677 7.91 4.08 7.68

MW6L 0.0551 0.0538 0.0551 0.0952 0.0925 0.0855 0.372 0.322 0.342

MW7R 0.536 0.653 0.515 1.87 2.28 1.77 22.5 9.62 25.1

MW8R 0.0508 0.0533 0.0583 0.128 0.0932 0.119 0.410 0.239 0.259

MW9R(1) <0.0250 0.0269 <0.0250 0.0650 0.0848 0.0545 0.062 0.214 <0.0232

MW9L(1) <0.0250 <0.0250 <0.0250 <0.0250 <0.0250 <0.0250 0.0425 <0.0928 0.0445

MW10R 0.0579 0.0640 0.0675 0.264 0.242 0.300 0.238 0.295 0.565

MW11L <0.0250 <0.0250 <0.0250 0.0886 0.0748 0.0777 0.496 0.449 0.383

Notes:

Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results.

Well ID suffixes:

 R = Residuum

 L = Bedrock

(1) upgradient monitoring well

Well ID

Average PFBS Concentration 

(ng/mL; ppb)

Average PFHS 

Concentration (ng/mL; ppb)

Average PFOS 

Concentration (ng/mL; ppb)

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Table_3-20_Browns_Ferry_Road_Site_GW_PFBS PFHS PFOS.xls Page 1 of 1
Table 3-21

Fish Morphometrics and PFOS Concentrations in Fish Filet in Bakers Creek

April 2012

3M Decatur, AL Facility

Sample ID Date Analytical Laboratory

Sampling 

Reach

Length 

(inches)

Weight 

(pounds)

PFOS 

MSF03 4/3/2012 3M Environmental Laboratory Upper 12.00 0.9 MSF04 4/3/2012 3M Environmental Laboratory Upper 14.75 1.7 MSF05 4/3/2012 3M Environmental Laboratory Upper 17.75 2.9 MSF05D 4/3/2012 AXYS Laboratory Upper " " MSF06 4/3/2012 3M Environmental Laboratory Upper 14.00 1.5 MSF18 4/4/2012 3M Environmental Laboratory Upper 15.75 2.5 MSF19 4/4/2012 3M Environmental Laboratory Upper 14.75 1.8 MSF20 4/4/2012 3M Environmental Laboratory Upper 14.25 1.0 MSF21 4/4/2012 3M Environmental Laboratory Upper 17.00 2.8 MSF22 4/4/2012 3M Environmental Laboratory Upper 11.25 0.8 MSF23 4/4/2012 3M Environmental Laboratory Upper 17.50 3.1 MSF02 4/3/2012 3M Environmental Laboratory Middle 14.50 1.8 MSF07 4/3/2012 3M Environmental Laboratory Middle 16.00 2.2 MSF08 4/3/2012 3M Environmental Laboratory Middle 13.50 1.3 MSF09 4/3/2012 3M Environmental Laboratory Middle 13.25 1.2 MSF09D (MSF27) 4/3/2012 3M Environmental Laboratory Middle " " MSF10 4/3/2012 3M Environmental Laboratory Middle 14.00 1.7 MSF11 4/3/2012 3M Environmental Laboratory Middle 15.375 2.0 MSF11D 4/3/2012 AXYS Laboratory Middle " " MSF11D (Duplicate) 4/3/2012 AXYS Laboratory Middle " " MSF12 4/3/2012 3M Environmental Laboratory Middle 15.50 2.1 MSF13 4/3/2012 3M Environmental Laboratory Middle 18.50 3.3 MSF14 4/3/2012 3M Environmental Laboratory Middle 17.50 3.6 MSF15 4/3/2012 3M Environmental Laboratory Middle 17.50 3.3 MSF01 4/3/2012 3M Environmental Laboratory Lower 10.75 0.5 MSF16 4/4/2012 3M Environmental Laboratory Lower 12.50 1.0 MSF17 4/4/2012 3M Environmental Laboratory Lower 13.75 1.2 MSF17D (MSF28) 4/4/2012 3M Environmental Laboratory Lower " " MSF24 4/5/2012 3M Environmental Laboratory Lower 16.00 2.1 MSF24D 4/5/2012 AXYS Laboratory Lower " " MSF25 4/5/2012 3M Environmental Laboratory Lower 16.50 2.1 MSF26 4/5/2012 3M Environmental Laboratory Lower 15.00 1.7 MSF26D (MSF29) 4/5/2012 3M Environmental Laboratory Lower " " Notes:PFOS concentrations are the average of the primary and duplicate analytical results expresssed in ng/g (ppb) on a wet weighSample IDs with a "D" suffix are field duplicates obtained from left side filet samples

J:\3M‐DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3‐21_and_3‐22_(new).xlsx Page 1 of 1
Table 3-22

PFOS Concentrations and Sample Parameters in Surface Water in Bakers Creek

April 2012

3M Decatur, AL Facility

Lower Reach Middle Reach Upper Reach

Sample Station ID LOC001 LOC002 LOC003

Northing (Decimal degrees) 34.644 34.638 34.637

Westing (Decimal degrees) 87.035 87.029 87.021Date 04/05/12 04/05/12 04/05/12Time 9:50 10:17 10:37Temperature (°C) 21.63 21.77 21.5

Specific conductance (μS/cm) 189 187 193

Dissolved oxygen (mg/L) 7.74 9.75 8.13

pH (S.U.) 7.33 8.13 7.56

Turbidity (NTU) 35.2 23.5 21.5Average PFOS (ng/mL) 0.450 0.691 0.0237

Notes:Average PFOS concentration is the average of primary and duplicate analytical results in ng/mL (ppb°C = degrees CelsiusμS/cm = microsiemen per centimetermg/L = milligrams per literS.U. = standard unitsNTU = Nephelometric Turbidity unitng/mL = nanogram per milliliter

J:\3M‐DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3‐21_and_3‐22_(new).xlsx Page 1 of 1
Table 3-23 

PFBS, PFHS and PFOS Concentrations in Fish Filet in the

Tennessee River

October - November 2012

3M Decatur, AL Facility

Sample ID Species Average PFBS (ng/g; ppb) Average PFHS (ng/g; ppb) Average PFOS (ng/g; ppb)

MSF071 <0.252 <0.250 35.8

MSF073D (MSF071) <0.252 <0.250 36.3

MSF074 <0.252 <0.250 32.7

MSF075 <0.252 <0.250 27.9

MSF080 <0.252 <0.250 18.6

MSF081 <0.252 <0.250 37.8

IPF070 <0.252 <0.250 1.81

IPF072D (IPF070) <0.980 <0.980 1.66

IPF076 <0.252 <0.250 0.768

IPF077 <0.252 <0.250 1.50

IPF078 <0.252 <0.250 5.17

IPF079 <0.252 <0.250 0.836

MSF084 <0.252 <0.250 44.1

MSF085 <0.252 <0.250 32.6

MSF086 <0.252 <0.250 49.5

MSF087 <0.252 <0.250 49.0

MSF088D (MSF087) <0.976 <0.976 56.6

MSF089 <0.252 <0.250 40.8

IPF082 <0.252 <0.250 2.92

IPF083 <0.252 <0.250 3.41

IPF112 <0.252 <0.100 1.78

IPF113 <0.252 <0.100 1.30

IPF114D (IPF113) <0.252 <0.100 1.24

IPF116 <0.252 <0.100 2.65

MSF109 <0.252 <0.100 21.8

MSF110D (MSF109) <0.990 <0.990 22.0

MSF111 <0.252 <0.100 25.7

MSF115 <0.252 <0.100 31.2

MSF119 <0.252 <0.100 23.9

MSF121D (MSF119) <0.252 <0.100 19.9

MSF124 <0.252 <0.100 73.2

IPF117 <0.252 <0.100 0.897

IPF118 <0.252 <0.100 2.01

IPF120 <0.252 <0.100 0.961

IPF122 <0.252 <0.100 4.45

IPF123 <0.252 <0.100 2.11

MSF090 <0.252 <0.250 104

MSF091 <0.252 <0.250 159

MSF092 <0.252 <0.250 434

MSF093D (MSF092) <0.948 <0.948 432

MSF099 <0.252 <0.250 124

MSF102 <0.252 <0.250 218

IPF100 <0.252 <0.250 4.69

IPF101 <0.252 <0.250 50.9

IPF103D (IPF101) <0.252 <0.250 42.0

IPF106 <0.252 <0.250 2.42

IPF107 <0.252 <0.250 7.85

IPF108 <0.252 <0.250 29.1

Reach 01 - River Mile 320

Reach 02 - Point Mallard

Reach 03 - River Mile 307.5 (Backwater)

Reach 04 - Betty Rye and Dry Branch Creek

Channel Catfish

Largemouth Bass

Channel Catfish

Largemouth Bass

Channel Catfish

Largemouth Bass

Channel Catfish

Largemouth Bass

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3-23_2012_FISH_Tissue.xlsx Page 1 of 4
Table 3-23 (Continued)

PFBS, PFHS and PFOS Concentrations in Fish Filet in the

Tennessee River

October - November 2012

3M Decatur, AL Facility

Sample ID Species Average PFBS (ng/g; ppb) Average PFHS (ng/g; ppb) Average PFOS (ng/g; ppb)

MSF169 <0.503 <0.250 435

MSF170 2.21 0.783 373

MSF171D (MSF170) 2.04 <0.893 345

MSF172 <0.503 0.391 96.4

MSF173 <0.503 <0.250 599

MSF174 <0.252 <0.500 521

IPF161 <0.503 <0.250 85.6

IPF162D (IPF161) <0.503 <0.250 79.3

IPF163 <0.503 <0.250 83.4

IPF164 <0.503 <0.250 283

IPF165 <0.503 <0.250 542

IPF166 <0.503 <0.250 286

MSF094 <0.252 <0.250 69.0

MSF096 <0.252 <0.250 46.9

MSF125 <0.252 <0.100 40.8

MSF126D (MSF126) <0.962 <0.962 43.9

MSF167 <0.503 <0.250 50.6

MSF168 <0.503 <0.250 120

IPF095 <0.252 <0.250 4.37

IPF097 <0.252 <0.250 4.37

IPF098 <0.252 <0.250 2.22

IPF104 <0.252 <0.250 4.15

IPF105 <0.252 <0.250 3.41

MSF127 0.444 0.416 408

MSF128 <0.252 <0.100 262

MSF129 <0.252 0.123 250

MSF130 <0.252 <0.100 333

MSF132D (MSF130) <0.252 <0.250 178

MSF131 <0.252 <0.250 324

IPF147 <0.252 <0.250 26.9

IPF148 <0.252 <0.250 69.6

IPF150D (IPF148) <0.252 <0.250 64.2

IPF149 <0.905 <0.905 57.8

IPF151 <0.503 <0.250 11.7

IPF152 <0.503 <0.250 29.2

MSF141 <0.252 <0.250 134

MSF143D (MSF141) <0.252 <0.250 45.0

MSF142 <0.252 <0.250 143

MSF144 <0.252 <0.250 76.9

MSF145 <0.252 <0.250 175

MSF146 <0.252 <0.250 80.3

IPF133 <0.252 <0.250 22.6

IPF134 <0.252 <0.250 3.98

IPF135 <0.252 <0.250 4.89

IPF136D (IPF135) <0.962 <0.962 4.12

IPF137 <0.252 <0.250 1.90

IPF138 <0.252 <0.250 8.55

Largemouth Bass

Reach 05 - Bakers Creek

Largemouth Bass

Largemouth Bass

Channel Catfish

Largemouth Bass

Channel Catfish

Channel Catfish

Channel Catfish

Reach 06 - Swan Creek

Reach 07 - River Mile 298

Reach 08 - Round Island Creek

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Table_3-23_2012_FISH_Tissue.xlsx Page 2 of 4
Table 3-23 (Continued)

PFBS, PFHS and PFOS Concentrations in Fish Filet in the

Tennessee River

October - November 2012

3M Decatur, AL Facility

Sample ID Species Average PFBS (ng/g; ppb) Average PFHS (ng/g; ppb) Average PFOS (ng/g; ppb)

MSF001 <1.10 <0.250 259

MSF004 <1.10 <0.250 167

MSF005D (MSF004) <1.10 <0.250 168

MSF006 <1.10 <0.250 173

MSF008D (MSF006) <0.990 <0.990 186

MSF139 <0.252 <0.250 279

MSF140 <0.252 <0.250 281

IPF012 <1.10 <0.250 12.1

IPF014 <1.10 <0.250 14.3

IPF016D (IPF014) <1.10 <0.250 14.6

IPF026 0.887 1.54 45.5

IPF029 0.460 <0.250 18.6

IPF031 1.31 <0.250 21.9

MSF030 0.590 <0.250 65.2

MSF032D (MSF030) <0.939 <0.939 56.1

MSF033 0.459 <0.250 190

MSF035 0.219 <0.250 207

MSF037 0.582 <0.250 101.9

MSF038D (MSF037) 0.996 <0.250 106

MSF040 0.259 <0.250 104

IPF007 <1.10 <0.250 8.86

IPF009 <1.10 <0.250 13.4

IPF034 1.862 <0.250 8.12

IPF036 0.371 <0.250 14.4

IPF153 <0.503 <0.250 16.3

IPF154D (IPF153) <1.01 <1.01 14.5

MSF042 0.131 <0.250 210

MSF043D (MSF042) 0.138 <0.250 224

MSF044 <0.252 <0.250 116

MSF045 <0.252 <0.250 225

MSF157 <0.503 <0.250 115

MSF158 <0.503 <0.250 145

IPF002 <1.10 <0.250 8.49

IPF003 3.82 <0.250 18.3

IPF039 0.305 <0.250 15.7

IPF041 0.405 <0.250 22.2

IPF155 <0.503 <0.250 11.9

IPF156D (IPF155) <0.943 <0.943 12.3

MSF020 <1.10 <0.250 65.8

MSF021 <1.10 <0.250 98.2

MSF023 0.184 <0.250 54.9

MSF025 0.294 <0.250 66.4

MSF027 0.176 <0.250 65.3

MSF028D (MSF027) 0.859 <0.250 65.9

IPF018 <1.10 <0.250 11.7

IPF019D (IPF018) <0.966 <0.966 10.2

IPF022 <1.10 <0.250 5.10

IPF159 <0.503 <0.250 11.2

IPF160 <0.503 <0.250 4.87

IPF179 0.506 <0.500 10.7

Reach 10 - Browns Ferry

Channel Catfish

Largemouth Bass

Channel Catfish

Largemouth Bass

Channel Catfish

Largemouth Bass

Reach 11 - Mallard Creek

Reach 12 - Elk River

Channel Catfish

Largemouth Bass

Reach 09 - Fox Creek

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Table_3-23_2012_FISH_Tissue.xlsx Page 3 of 4
Table 3-23 (Continued)

PFBS, PFHS and PFOS Concentrations in Fish Filet in the

Tennessee River

October - November 2012

3M Decatur, AL Facility

Sample ID Species Average PFBS (ng/g; ppb) Average PFHS (ng/g; ppb) Average PFOS (ng/g; ppb)

MSF010 <1.10 <0.250 71.0

MSF011 NR <0.250 98.5

MSF013 <1.10 <0.250 68.9

MSF015 <1.10 <0.250 67.1

MSF017 <1.10 <0.250 79.6

IPF024 2.67 <0.250 10.3

IPF175 <0.252 <0.500 8.57

IPF176 <0.252 <0.500 11.8

IPF177D (IPF176) <0.252 <0.500 12.7

IPF178 0.322 <0.500 10.5

IPF180 <0.252 <0.500 7.69

MSF046 <0.252 <0.250 54.1

MSF048 0.269 <0.250 88.9

MSF050D (MSF048) <0.252 <0.250 81.6

MSF052 <0.252 <0.250 93.5

MSF054D (MSF052) <0.990 <0.990 91.7

MSF054D <0.901 <0.901 103

MSF056 <0.252 <0.250 54.8

MSF058 <0.252 <0.250 75.3

IPF047 0.327 <0.250 14.3

IPF049 <0.252 <0.250 5.59

IPF051 0.337 <0.250 8.01

IPF053 1.54 <0.250 6.68

IPF055 <0.252 <0.250 11.0

MSF060 <0.252 <0.250 64.7

MSF061 0.289 <0.250 75.5

MSF062 <0.252 <0.250 103

MSF064D (MSF062) <0.797 <0.797 99.8

MSF065 <0.252 <0.250 86.9

MSF067 <0.252 <0.250 94.6

IPF057 <0.252 <0.250 7.33

IPF059D (IPF057) 0.327 <0.250 7.56

IPF063 0.854 <0.250 6.67

IPF066 0.353 <0.250 10.5

IPF068 <0.252 <0.250 9.60

IPF069 0.739 <0.250 5.63

Notes:

PFBS, PFHS and PFOS concentrations are the average of the primary and duplicate analytical results expressed in ng/g (ppb) on a wet weight basis

na = not applicable

Channel Catfish

Largemouth Bass

Channel Catfish

Largemouth Bass

Channel Catfish

Sample IDs with a "D" suffix are field duplicates obtained from left side filet samples

Field duplicate samples identified with "D" suffix and the corresponding primary sample ID in parentheses

NR - Not reported due to quality control issues

Reach 13 - River Mile 281

Reach 14 - Big Nance Creek [Wilson Reservoir]

Reach 15 - Shoal Creek [Wilson Reservoir]

Largemouth Bass

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Table_3-23_2012_FISH_Tissue.xlsx Page 4 of 4
Table 3-24

PFBS, PFHS and PFOS Concentrations in Surface Water in the Tennessee River - Fish Reach Locations

November 2012

3M Decatur, AL Facility

Sampling 

Reach No.

Sampling 

Reach

Location 

Number Sample ID Date Time

Analytical 

Laboratory

Average PFBS 

(ng/mL; ppb)

Average PFHS 

(ng/mL; ppb)

Average PFOS 

(ng/mL; ppb)

L1 DAL-SW-R01L1-0-121116 11/16/2012 10:45 3M Laboratory < 0.00500 < 0.00500 0.00691

L2 DAL-SW-R01L2-0-121116 11/16/2012 11:15 3M Laboratory < 0.00500 < 0.00500 0.00762

L3 DAL-SW-R01L3-0-121116 11/16/2012 11:40 3M Laboratory < 0.00500 < 0.00500 0.00669

L1 DAL-SW-R02L1-0-121116 11/16/2012 12:50 3M Laboratory < 0.00500 < 0.00500 0.00932

L2 DAL-SW-R02L2-0-121116 11/16/2012 13:05 3M Laboratory < 0.00500 0.00703 0.00906

L3 DAL-SW-R02L3-0-121116 11/16/2012 13:20 3M Laboratory < 0.00500 < 0.00500 0.00894

L3 (DUP) DAL-SW-R02L3-DUP-121116 11/16/2012 13:20 3M Laboratory < 0.00500 < 0.00500 0.00846

L3 (DUP1

) DAL-SW-R02L3-DUPA-12111611/16/2012 13:20 AXYS Laboratory 0.00270 < 0.00190 0.00759

L1 DAL-SW-R03L1-0-121116 11/16/2012 13:50 3M Laboratory < 0.00500 < 0.00500 0.00703

L2 DAL-SW-R03L2-0-121116 11/16/2012 14:00 3M Laboratory < 0.00500 < 0.00500 0.00734

L3 DAL-SW-R03L3-0-121116 11/16/2012 14:08 3M Laboratory < 0.00500 < 0.00500 0.00639

L1 DAL-SW-R04L1-0-121116 11/16/2012 14:45 3M Laboratory < 0.00500 < 0.00500 0.0144

L2 DAL-SW-R04L2-0-121116 11/16/2012 15:00 3M Laboratory < 0.00500 < 0.00500 0.0180

L3 DAL-SW-R04L3-0-121116 11/16/2012 15:10 3M Laboratory 0.0104 0.0110 0.0705

L1 DAL-SW-R05L1-0-121119 11/19/2012 16:25 3M Laboratory 0.124 0.0398 0.385

L1 (DUP) DAL-SW-R05L1-DUP-121119 11/19/2012 16:25 3M Laboratory 0.116 0.0423 0.405

L1 (DUP1

) DAL-SW-R05L1-DUPA-12111911/19/2012 16:25 AXYS Laboratory 0.166 0.0355 0.388

L2 DAL-SW-R05L2-0-121119 11/19/2012 16:35 3M Laboratory < 0.00500 < 0.00500 0.0177

L3 DAL-SW-R05L3-0-121119 11/19/2012 16:45 3M Laboratory < 0.00500 < 0.00500 0.00984

L1 DAL-SW-R06L1-0-121120 11/20/2012 16:15 3M Laboratory < 0.00500 < 0.00500 0.00684

L2 DAL-SW-R06L2-0-121120 11/20/2012 16:30 3M Laboratory < 0.00500 < 0.00500 0.00672

L2 (DUP1

) DAL-SW-R06L2-DUPA-12112011/20/2012 16:30 AXYS Laboratory 0.00269 < 0.00242 0.00766

L3 DAL-SW-R06L3-0-121120 11/20/2012 16:40 3M Laboratory < 0.00500 < 0.00500 0.00677

L1 DAL-SW-R07L1-0-121119 11/19/2012 15:10 3M Laboratory 0.0464 0.0164 0.0842

L2 DAL-SW-R07L2-0-121119 11/19/2012 15:25 3M Laboratory 0.0638 0.0195 0.102

L3 DAL-SW-R07L3-0-121119 11/19/2012 15:40 3M Laboratory 0.00965 < 0.00500 0.0348

L1 DAL-SW-R08L1-0-121119 11/19/2012 14:05 3M Laboratory < 0.00500 < 0.00500 0.00642

L2 DAL-SW-R08L2-0-121119 11/19/2012 14:20 3M Laboratory < 0.00500 < 0.00500 0.00657

L3 DAL-SW-R08L3-0-121119 11/19/2012 14:35 3M Laboratory < 0.00500 < 0.00500 0.00767

L1 DAL-SW-R09L1-0-121119 11/19/2012 11:40 3M Laboratory 0.0641 0.0197 0.103

L2 DAL-SW-R09L2-0-121119 11/19/2012 11:50 3M Laboratory 0.0846 0.0262 0.125

L3 DAL-SW-R09L3-0-121119 11/19/2012 12:05 3M Laboratory 0.0594 0.0196 0.0910

L1 DAL-SW-R10L1-0-121119 11/19/2012 10:35 3M Laboratory < 0.00500 < 0.00500 0.00682

L2 DAL-SW-R10L2-0-121119 11/19/2012 10:48 3M Laboratory < 0.00500 < 0.00500 0.00699

L3 DAL-SW-R10L3-0-121119 11/19/2012 11:00 3M Laboratory < 0.00500 < 0.00500 0.00649

L3 (DUP) DAL-SW-R10L3-DUP-121119 11/19/2012 11:00 3M Laboratory < 0.00500 < 0.00500 0.00663

L3 (DUP1

) DAL-SW-R10L3-DUPA-12111911/19/2012 11:00 AXYS Laboratory < 0.00215 < 0.00215 0.00548

L1 DAL-SW-R11L1-0-121119 11/19/2012 9:35 3M Laboratory 0.0521 0.0179 0.0878

L2 DAL-SW-R11L2-0-121119 11/19/2012 9:45 3M Laboratory 0.0511 0.0189 0.0910

L3 DAL-SW-R11L3-0-121119 11/19/2012 10:00 3M Laboratory 0.0289 0.0113 0.0695

L1 DAL-SW-R12L1-0-121117 11/17/2012 16:20 3M Laboratory < 0.00500 < 0.00500 0.0124

L2 DAL-SW-R12L2-0-121117 11/17/2012 16:35 3M Laboratory < 0.00500 < 0.00500 0.0138

L3 DAL-SW-R12L3-0-121117 11/17/2012 16:50 3M Laboratory < 0.00500 < 0.00500 0.0133

L1 DAL-SW-R13L1-0-121117 11/17/2012 15:15 3M Laboratory 0.0100 < 0.00500 0.0248

L2 DAL-SW-R13L2-0-121117 11/17/2012 15:35 3M Laboratory 0.0120 < 0.00500 0.0277

L3 DAL-SW-R13L3-0-121117 11/17/2012 15:50 3M Laboratory 0.00983 < 0.00500 0.0238

L1 DAL-SW-R14L1-0-121117 11/17/2012 11:10 3M Laboratory 0.00761 < 0.00500 0.0187

L2 DAL-SW-R14L2-0-121117 11/17/2012 11:30 3M Laboratory 0.00769 < 0.00500 0.0190

L3 DAL-SW-R14L3-0-121117 11/17/2012 11:45 3M Laboratory 0.00847 < 0.00500 0.0230

L1 DAL-SW-R15L1-0-121117 11/17/2012 12:25 3M Laboratory 0.0148 < 0.00500 0.0199

L1 (DUP) DAL-SW-R15L1-DUP-121117 11/17/2012 12:25 3M Laboratory 0.0137 < 0.00500 0.0189

L1 (DUP1

) DAL-SW-R15L1-DUPA-12111 11/17/2012 12:25 AXYS Laboratory 0.0206 < 0.00220 0.0220

L2 DAL-SW-R15L2-0-121117 11/17/2012 12:55 3M Laboratory 0.0132 < 0.00500 0.0184

L3 DAL-SW-R15L3-0-121117 11/17/2012 13:10 3M Laboratory 0.0141 < 0.00500 0.0181

Notes:

DUP = Duplicate sample

Average PFBS, PFHS and PFOS concentrations are the averages of primary and duplicate analytical results in ppb.

1 Sample duplicate analyzed by AXYS Laboratory in British Columbia, Canada.

Reach 01 River Mile 320

Reach 02 Point Mallard

Reach 03 RM 307.5 

(Backwater)

Reach 04

Betty Rye & 

Dry Branch 

Creek

Reach 05 Bakers Creek

Reach 06 Swan Creek

Reach 07 River Mile 298

Reach 08 Round Island 

Creek

Reach 09 Fox Creek

Reach 10 Browns Ferry

Reach 14 Big Nance 

Creek

Reach 15 Shoal Creek

Reach 11 Mallard Creek

Reach 12 Elk River

Reach 13 Rive Mile 281

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\

Table_3-24_3-25_2012_FISH_SW.xlsx Page 1 of 1
Table 3-25

PFBS, PFHS and PFOS Concentrations in Surface Water in the Tennessee River - Surface Water Transects

December 2012

3M Decatur, AL Facility

Transect No. Location Number Average PFBS 

(ng/mL; ppb)

Average PFHS 

(ng/mL; ppb)

Average PFOS 

(ng/mL; ppb)

01 < 0.0050 < 0.0050 0.00613

01 (DUP) < 0.00500 < 0.00500 0.00636

01 (DUP1

) < 0.00201 < 0.00201 0.00526

02 < 0.0050 < 0.0050 0.00615

03 < 0.0050 < 0.0050 0.00680

04 < 0.0050 < 0.0050 0.00689

05 < 0.0050 < 0.0050 0.00663

06 < 0.0050 < 0.0050 0.00643

07 < 0.0050 < 0.0050 0.00638

08 < 0.0050 0.00938 0.00660

09 < 0.0050 < 0.0050 0.00645

10 < 0.0050 < 0.0050 0.00670

01 < 0.0050 < 0.0050 0.00835

02 < 0.0050 < 0.0050 0.00993

02 (DUP) < 0.00500 < 0.00500 0.00943

02 (DUP1) 0.00383 < 0.00203 0.00844

03 < 0.0050 < 0.0050 0.00650

04 < 0.0050 < 0.0050 0.00623

05 < 0.0050 < 0.0050 0.00696

06 < 0.0050 < 0.0050 0.00679

07 < 0.0050 < 0.0050 0.00683

08 < 0.0050 < 0.0050 0.00644

09 < 0.0050 < 0.0050 0.00698

10 < 0.0050 < 0.0050 0.00777

01 < 0.0050 < 0.0050 0.0190

02 < 0.0050 < 0.0050 0.00746

03 < 0.0050 < 0.0050 0.00694

03 (DUP) < 0.00500 < 0.00500 0.00751

03 (DUP1) < 0.00207 < 0.00207 0.00668

04 < 0.0050 < 0.0050 0.00768

05 < 0.0050 < 0.0050 0.00730

06 < 0.0050 < 0.0050 0.00611

07 < 0.0050 < 0.0050 0.00657

08 < 0.0050 < 0.0050 0.00698

09 < 0.0050 < 0.0050 0.00658

10 < 0.0050 < 0.0050 0.00732

01 0.285 0.0174 0.138

02 < 0.0050 < 0.0050 0.00869

03 < 0.0050 < 0.0050 0.00752

04 < 0.0050 < 0.0050 0.00729

04 (DUP) < 0.00500 < 0.00500 0.00846

04 (DUP1) < 0.00237 < 0.00237 0.00630

05 < 0.0050 < 0.0050 0.00821

06 < 0.0050 < 0.0050 0.00742

07 < 0.0050 < 0.0050 0.00731

08 < 0.0050 < 0.0050 0.00704

09 < 0.0050 < 0.0050 0.00673

10 < 0.0050 < 0.0050 0.00778

01 0.105 0.0143 0.0728

02 0.115 0.0126 0.0765

03 0.0638 0.00835 0.0492

04 < 0.0050 < 0.0050 0.00789

05 < 0.0050 < 0.0050 0.00720

05 (DUP) < 0.00500 < 0.00500 0.00678

05 (DUP1) < 0.00223 < 0.00223 0.00510

06 < 0.0050 < 0.0050 0.00682

07 < 0.0050 < 0.0050 0.00810

08 < 0.0050 < 0.0050 0.00820

09 < 0.0050 < 0.0050 0.00815

10 < 0.0050 < 0.0050 0.00857

T1

T4

T3

T2

T5

J:\3M‐DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\

Table_3‐24_3‐25_2012_FISH_SW.xlsx Page 1 of 2
Table 3-25 (Continued)

PFBS, PFHS and PFOS Concentrations in Surface Water in the Tennessee River - Surface Water Transects

December 2012

3M Decatur, AL Facility

Transect No. Location Number Average PFBS 

(ng/mL; ppb)

Average PFHS 

(ng/mL; ppb)

Average PFOS 

(ng/mL; ppb)

01 0.0896 0.0242 0.0864

02 0.124 0.0180 0.107

03 0.0570 0.00919 0.0566

04 0.0237 < 0.0050 0.0238

05 0.0124 < 0.0050 0.0145

06 < 0.0050 < 0.0050 0.00972

06 < 0.00500 < 0.00500 0.0111

06 (DUP) 0.00214 < 0.00201 0.00745

06 (DUP1) < 0.00201 < 0.00201 0.00862

07 < 0.0050 < 0.0050 0.00649

08 < 0.0050 < 0.0050 0.00692

09 < 0.0050 < 0.0050 0.00766

10 < 0.0050 < 0.0050 0.00783

01 0.0710 0.00807 0.0426

02 0.0651 0.00837 0.0466

03 0.0556 0.00769 0.0468

04 0.0325 < 0.0050 0.0316

05 0.0362 0.00517 0.0312

06 0.0269 < 0.0050 0.0242

07 0.0190 < 0.0050 0.0202

07 (DUP) 0.0210 < 0.00500 0.0193

07 (DUP1) 0.0150 < 0.00218 0.0173

08 0.0140 < 0.0050 0.0165

09 0.0106 < 0.0050 0.0134

10 0.0177 < 0.0050 0.0176

01 0.0130 < 0.0050 0.0152

02 0.0125 < 0.0050 0.0154

03 0.0132 < 0.0050 0.0159

04 0.0143 < 0.0050 0.0166

05 0.0129 < 0.0050 0.0154

06 0.0121 < 0.0050 0.0121

07 0.0115 < 0.0050 0.0141

08 0.0112 < 0.0050 0.0133

08 (DUP) 0.0109 < 0.00500 0.0143

08 (DUP1) 0.0114 < 0.00210 0.0128

09 0.00928 < 0.0050 0.0115

10 0.0111 < 0.0050 0.0123

01 0.0177 < 0.0050 0.0203

02 0.0112 < 0.0050 0.0205

03 0.0142 < 0.0050 0.0201

04 0.0137 < 0.0050 0.0207

05 0.0147 < 0.0050 0.0244

06 0.0139 < 0.0050 0.0197

07 0.0127 < 0.0050 0.0214

08 0.0134 < 0.0050 0.0203

09 0.0128 < 0.0050 0.0192

09 (DUP) 0.0140 < 0.00500 0.0194

09 (DUP1) 0.0126 < 0.00232 0.0177

10 0.0134 < 0.0050 0.0190

Notes:

Average PFBS, PFHS and PFOS concentrations are the averages of primary and duplicate analytical results.

DUP = Duplicate sample

T8

1 Sample duplicates analyzed by AXYS Laboratory in British Columbia, Canada.

T9

T6

T7

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\

Table_3-24_3-25_2012_FISH_SW.xlsx Page 2 of 2
Table 3-26

PFBS, PFHS and PFOS Concentrations for Avenue A 

Groundwater, Surface Water, Soil and Sediment Samples

June - July 2010

3M Decatur, AL Facility

Location ID Sample Depth 

(ft bgs) Average PFBS Average PFHS Average PFOS

SW01 -- 15.0 120 248

SW02 -- 7.68 52.0 213

SW03 -- 9.57 72.2 197

SW04 -- 13.7 86.5 192

SW05 -- 20.9 102 392

SW06 -- 17.4 77.5 228

SW07 -- 10.8 47.9 129

SW08 -- 40.7 166 266

SW09 -- 279 643 382

SW10 -- 22.5 233 389

SW11 -- 102 1130 850

SW12 -- 0.764 3.68 104

GP01 -- 5.02 7.63 26.2

GP02 -- 21.1 11.2 17.5

GP03 -- 66.4 413 373

GP04 -- 19.1 85.8 152

GP05 -- 30.0 158 382

GP07 -- 20.7 171 1780

GP08 -- 6.36 70.2 1420

GP09 -- 20.7 36.0 95.5

GP10 -- 447 420 127

GP11 -- 67.0 330 660

GP12 -- 2.59 11.2 48.8

216R -- 10.6 30.5 119

SD01 0 - 0.5 0.611 2.78 225

SD01 0.5 - 1.0 0.605 1.72 129

SD02 0 - 0.5 6.03 64.5 6770

SD02 0.5 - 1.0 1.21 12.7 1070

SD03 0 - 0.5 7.31 48.1 897

SD03 0.5 - 1.0 3.41 19.0 559

SD04 0 - 0.5 24.9 178 2120

SD04 0.5 - 1.0 8.93 79.0 1910

SD05 0 - 0.5 4.72 34.5 525

SD05 0.5 - 1.0 4.35 26.0 310

SD06 0 - 0.5 6.24 39.6 617

SD06 0.5 - 1.0 3.37 18.9 338

SD07 0 - 0.5 8.75 51.8 1660

SD07 0.5 - 1.0 9.48 60.9 2430

SD08 0 - 0.5 5.28 42.9 521

SD08 (DUP) 0 - 0.5 4.80 46.0 540

SD08 0.5 - 1.0 1.62 9.03 93.2

SD09 0 - 0.5 27.5 135 1300

SD09 0.5 - 1.0 14.0 101 1250

SD10 0 - 0.5 171 1030 4570

SD10 0.5 - 1.0 66.5 459 7830

SD11 0 - 0.5 8.42 156 1560

SD11 0.5 - 1.0 4.10 57.9 786

SD12 0 - 0.5 16.9 289 3210

SD12 (DUP) 0 - 0.5 17.3 293 3270

SD12 0.5 - 1.0 5.31 77.0 451

SD13 0 - 0.5 10.4 123 1250

SD13 0.5 - 1.0 12.6 138 1480

SD14 0 - 0.5 129 1450 9130

SD14 0.5 - 1.0 100 1460 5370

SD15 0 - 0.5 52.3 399 14600

SD15 0.5 - 1.0 17.3 146 13200

SD16 0 - 0.5 27.2 764 7060

SD16 (DUP) 0 - 0.5 33.6 830 8590

SD16 0.5 - 1.0 22.6 569 3120

SD17 0 - 0.5 28.2 1080 10700

SD17 0.5 - 1.0 24.8 853 7120

Surface Water (ng/mL)

Groundwater (ng/mL)

Sediment (ng/g)

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\

Table_3-26_3-27_AveA_Sample_Data_Original_2011.xlsx Page 1 of 3
Table 3-26 (Continued)

PFBS, PFHS and PFOS Concentrations for Avenue A 

Groundwater, Surface Water, Soil and Sediment Samples

June - July 2010

3M Decatur, AL Facility

Location ID Sample Depth 

(ft bgs) Average PFBS Average PFHS Average PFOS

SS01 0 - 0.5 0.909 4.73 750

SS01 0.5 - 1.0 0.452 5.06 919

SS02 0 - 0.5 0.786 7.26 405

SS02 0.5 - 1.0 4.11 54.6 168

SS03 0 - 0.5 4.09 212 NR

SS03 0.5 - 1.0 3.92 109 2880

SS03 (DUP) 0.5 - 1.0 5.27 118 2110

SS04 0 - 0.5 2.61 5.59 506

SS04 0.5 - 1.0 0.966 2.03 179

SS05 0 - 0.5 22.5 288 10600

SS05 0.5 - 1.0 6.71 67.6 4040

SS06 0 - 0.5 1.27 2.61 331

SS06 0.5 - 1.0 0.533 1.17 164

SS06 (DUP) 0.5 - 1.0 0.433 0.975 132

SS07 0 - 0.5 11.6 59.6 747

SS07 0.5 - 1.0 9.20 66.3 3140

SS08 0 - 0.5 1.67 4.80 53.9

SS08 (DUP) 0 - 0.5 1.42 4.01 46.5

SS08 0.5 - 1.0 1.61 1.70 26.2

SS09 0 - 0.5 1.53 7.02 635

SS09 0.5 - 1.0 1.44 4.53 416

GP01 0 - 0.5 5.73 5.99 366

GP01 0.5 - 1.0 3.86 4.92 125

GP01 2.0 - 2.5 3.55 10.0 292

GP01 6.0 - 6.5 2.11 3.11 29.0

GP02 0 - 0.5 1.37 0.175 66.3

GP02 0.5 - 1.0 0.701 < 0.200 76.7

GP02 2.0 - 2.5 0.345 0.113 195

GP02 (DUP) 2.0 - 2.5 0.392 < 0.200 173

GP02 12.0 - 12.5 2.59 1.58 5.48

GP03 0 - 0.5 5.71 41.8 700

GP03 0.5 - 1.0 32.6 252 2070

GP03 2.0 - 2.5 40.1 321 1450

GP03 (DUP) 2.0 - 2.5 49.0 417 1240

GP03 5.0 - 5.5 12.8 82.2 352

GP04 0 - 0.5 4.51 3.32 840

GP04 0.5 - 1.0 2.16 1.55 513

GP04 2.0 - 2.5 1.72 4.83 99.2

GP04 5.0 - 5.5 2.78 12.8 33.2

GP05 0 - 0.5 12.3 8.82 346

GP05 0.5 - 1.0 5.29 12.7 381

GP05 2.0 - 2.5 1.75 7.95 429

GP05 5.5 - 6.0 5.11 48.6 1080

GP06 0 - 0.5 1.86 4.09 209

GP06 0.5 - 1.0 0.801 2.79 447

GP06 2.0 - 2.5 0.180 1.46 136

GP06 11.0 - 11.5 0.858 1.86 41.4

GP07 0 - 0.5 1.69 17.7 599

GP07 0.5 - 1.0 0.991 34.7 3680

GP07 2.0 - 2.5 1.22 25.3 1870

GP07 13.0 - 13.5 12.7 146 14000

GP08 0 - 0.5 NR NR 5160

GP08 0.5 - 1.0 0.320 11.3 770

GP08 (DUP) 0.5 - 1.0 0.397 13.7 1010

GP08 2.0 - 2.5 0.231 7.32 322

GP08 5.0 - 5.5 0.693 10.7 337

GP09 0 - 0.5 17.8 244 3630

GP09 0.5 - 1.0 4.71 43.1 1630

GP09 (DUP) 0.5 - 1.0 5.73 64.6 2280

GP09 2.0 - 2.5 1.37 5.23 331

GP09 5.0 - 5.5 3.83 6.26 64.3

Soil (ng/g)

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\

Table_3-26_3-27_AveA_Sample_Data_Original_2011.xlsx Page 2 of 3
Table 3-26 (Continued)

PFBS, PFHS and PFOS Concentrations for Avenue A 

Groundwater, Surface Water, Soil and Sediment Samples

June - July 2010

3M Decatur, AL Facility

Location ID Sample Depth 

(ft bgs) Average PFBS Average PFHS Average PFOS

GP10 0 - 0.5 28.4 141 734

GP10 0.5 - 1.0 46.5 229 581

GP10 2.0 - 2.5 99.8 162 297

GP10 6.0 - 6.5 76.6 126 139

GP11 0 - 0.5 3.57 20.9 157

GP11 0.5 - 1.0 6.29 45.0 123

GP11 2.0 - 2.5 23.8 30.7 242

GP11 6.5 - 7.0 5.68 33.2 290

GP11 (DUP) 6.5 - 7.0 7.68 55.0 579

GP12 0 - 0.5 0.607 4.77 666

GP12 0.5 - 1.0 0.521 2.75 407

GP12 2.0 - 2.5 1.88 6.81 460

GP12 17.0 - 17.5 2.01 9.74 59.1

Notes:

-- = Not Applicable

DUP = Duplicate

ft bgs = feet below ground surface

Soil (ng/g (continued)

Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results in ng/mL (ppb) for surface water 

and groundwater and in ng/g (ppb) on a dry weight basis for soil and sediment samples.

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\

Table_3-26_3-27_AveA_Sample_Data_Original_2011.xlsx Page 3 of 3
Table 3-27

PFBS, PFHS and PFOS Concentrations for Avenue A 

Groundwater Samples

January 2011

3M Decatur, AL Facility

Sample Locations Average PFBS (ng/mL) Average PFHS (ng/mL) Average PFOS (ng/mL)

SS22 3.39 1.84 8.62

SS24 19.2 143 500

210R 43.2 309 539

Notes:

Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results in ng/mL (ppb).

Temporary wells SS22 and SS24 and the monitoring well 210R were installed in the residuum.

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\

Table_3-26_3-27_AveA_Sample_Data_Original_2011.xlsx Page 1 of 1
Table 3-28

On-Site Avenue A Soil and Sediment PFBS, PFHS and PFOS Concentrations

January 2011

3M Decatur, AL Facility

Sample

Location

Depth 

(ft bgs)

Average PFBS 

(ng/g; ppb)

Average PFHS 

(ng/g; ppb)

Average PFOS 

(ng/g; ppb)

SS12 0 - 0.5 1.17 13.7 2110

SS12 0.5 - 1 4.89 186 5830

SS13 0 - 0.5 1.01 1.93 123

SS16 0 - 0.5 7.24 6.74 312

SS16 DUP 0 - 0.5 7.54 6.48 300

SS11 0 - 0.5 0.696 0.918 57.4

SS11 0.5 - 1 0.627 4.30 98.9

SS20 0 - 0.5 0.309 2.68 102

SS20 DUP 0 - 0.5 0.247 2.27 107

SS19 0 - 0.5 0.224 2.22 NR

SS19 0.5 - 1 1.30 14.6 397

SS15 0 - 0.5 0.283 3.49 272

SS17 0 - 0.5 0.228 2.13 61.2

SS14 0 - 0.5 0.494 4.18 324

SS18 0 - 0.5 0.814 2.33 78.9

SS10 0 - 0.5 5.28 29.1 3730

SS30 0 - 0.5 0.548 3.83 437

SS30 0.5 - 1 < 0.500 0.869 130

SS30 1.5 - 2 1.22 8.06 309

SS25 0 - 0.5 19.7 607 3320

SS25 0.5 - 1 33.8 516 2520

SS25 1.5 - 2 35.0 295 2020

SD22 0 - 0.5 13.9 193 4060

SD22 0.5 - 1 7.70 68.3 887

SD22 DUP 0.5 - 1 6.49 69.1 1120

SD22 1.5 - 2 8.19 62.8 473

SD21 0 - 0.5 7.86 107 2020

SD21 0.5 - 1 10.4 148 1650

SD21 1.5 - 2 5.46 57.7 562

SS24 0 - 0.5 6.14 61.3 1320

SS24 0.5 - 1 8.80 61.0 974

SS24 1.5 - 2 3.17 34.2 1600

SS29 0 - 0.5 1.67 9.64 605

SS29 0.5 - 1 0.760 3.64 271

SS29 1.5 - 2 6.30 43.3 1070

SS20 0.5 - 1 0.299 1.70 29.4

SS13 0.5 - 1 0.988 2.17 559

SS13 DUP 0.5 - 1 0.906 2.23 552

SS15 0.5 - 1 0.154 1.26 170

SS17 0.5 - 1 0.226 3.06 220

SS14 0.5 - 1 < 0.500 3.12 271

SS18 0.5 - 1 < 0.500 0.597 30.8

SS16 0.5 - 1 2.39 2.61 303

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\

Table_3-28_Ave A Soil and Sediment PFBS PFHS PFOS DATA Jan 2011.xlsx Page 1 of 2
Table 3-28 (Continued)

On-Site Avenue A Soil and Sediment PFBS, PFHS and PFOS Concentrations

January 2011

3M Decatur, AL Facility

Sample

Location

Depth 

(ft bgs)

Average PFBS 

(ng/g; ppb)

Average PFHS 

(ng/g; ppb)

Average PFOS 

(ng/g; ppb)

SS16 1.5 - 2 7.00 5.48 165

SS10 0.5 - 1 1.25 7.81 453

SS10 DUP 0.5 - 1 1.18 6.77 365

SS10 1.5 - 2 3.58 19.8 471

SD20 0 - 0.5 10.3 160 2800

SD20 0.5 - 1 10.8 139 1300

SD20 1.5 - 2 9.68 121 672

SD23 0 - 0.5 4.97 44.6 518

SD23 0.5 - 1 2.42 22.5 270

SD23 1.5 - 2 2.08 16.1 176

SS28 0 - 0.5 0.837 0.888 163

SS28 0.5 - 1 0.633 0.879 197

SS28 DUP 0.5 - 1 0.604 0.804 196

SS28 1.5 - 2 2.29 4.31 174

SS27 0 - 0.5 0.744 0.341 145

SS27 0.5 - 1 0.652 0.471 241

SS27 1.5 - 2 0.412 0.415 162

SS22 0 - 0.5 1.39 4.40 273

SS22 0.5 - 1 1.41 2.47 157

SS22 DUP 0.5 - 1 1.45 2.29 151

SS22 1.5 - 2 0.523 0.864 27.3

SS21 0 - 0.5 0.823 14.0 1130

SS21 0.5 - 1 0.367 13.4 325

SS21 1.5 - 2 1.95 13.0 121

SD18 0 - 0.5 9.70 107 1000

SD18 0.5 - 1 7.57 78.6 545

SD18 1.5 - 2 5.77 47.8 NR

SD19 0 - 0.5 12.9 119 873

SD19 0.5 - 1 14.0 127 1080

SD19 1.5 - 2 8.50 75.7 345

SS26 0 - 0.5 0.552 8.26 970

SS26 DUP 0 - 0.5 0.666 9.95 NR

SS26 0.5 - 1 1.03 17.7 1140

SS26 1.5 - 2 2.87 62.4 1040

SS12 1.5 - 2 10.7 294 2520

SS19 1.5 - 2 1.84 23.6 294

SS20 1.5 - 2 0.483 2.38 206

SS14 1.5 - 2 < 0.500 2.93 223

SS17 1.5 - 2 0.886 1.97 221

SS13 1.5 - 2 1.48 1.93 357

SS15 1.5 - 2 0.269 3.85 109

SS18 1.5 - 2 0.246 1.63 156

SS11 1.5 - 2 < 0.500 0.515 NR

Notes:

ft bgs = feet below ground surface

DUP = Duplicate sample

NR = Not reported due to quality control issues

Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results on a dry weight basis.

SD = sediment

SS = surface soil

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Table 3-29

On-Site Area Adjacent to Field 6 

Soil Boring PFBS, PFHS and PFOS Concentrations

December 2012

3M Decatur, AL Facility

Sample PFBS PFHS PFOS

Depth (ng/g, ppb) (ng/g, ppb) (ng/g, ppb)

 DAL SB DF601 0 0000 121213 0 - 0.5 ft NR 33.3 3890

 DAL SB DF601 0 0050 121213 5 - 5.5 ft 1.67 5.04 229

 DAL SB DF602 0 0000 121213 0 - 0.5 ft 0.373 3.56 851

 DAL SB DF602 0 0050 121213 5 - 5.5 ft 64.8 270 1730

 DAL SB DF603 0 0000 121213 0 - 0.5 ft 0.423 NR 112

 DAL SB DF603 0 0050 121213 5 - 5.5 ft 2.43 6.58 3.86

Notes:

NR - not reported

Sample ID

PFBS, PFHS and PFOS concentrations are the average of primary and duplicate sample analytical results on a dry weight basis.

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Table 3-30

Browns Ferry Road Site Surface Water 

PFBS, PFHS and PFOS Concentrations

February 2012, October 2012 and August 2013

3M Decatur, AL Facility

February 

2012

October 

2012

August 

2013

February 

2012

October 

2012

August 

2013

February 

2012

October 

2012

August 

2013

ET01 0.0354 NS NS <0.0250 NS NS 0.0302 NS NS

ET02 <0.0250 <0.0250 0.0350 <0.0250 <0.0250 <0.0250 0.0627 <0.0250 0.0546

ET03 <0.0250 <0.0250 0.0563 <0.0250 <0.0250 0.0806 0.303 0.230 0.278

ET04 <0.0250 0.0513 0.0362 <0.0250 0.0364 <0.0250 4.30 0.200 0.109

ET05 NS <0.0250 NS NS 0.0748 NS NS 0.155 NS

WT01 NS <0.0250 NS NS 0.0733 NS NS <0.0250 NS

DC01 NS 0.115 NS NS 0.232 NS NS 1.54 NS

Notes:

Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results.

ET = Eastern Tributary

WT = Western Tributary

DC = Dry Creek

NS = Not Sampled

Location 

ID

Average PFBS Concentration 

(ng/mL; ppb)

Average PFHS Concentration 

(ng/mL; ppb)

Average PFOS Concentration 

(ng/mL; ppb)

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Table 3-31

Browns Ferry Road Site Sediment PFBS, PFHS and PFOS Concentrations

February 2012

Location ID

Average PFBS 

(ng/g; ppb)

Average PFHS 

(ng/g; ppb)

Average PFOS 

(ng/g; ppb)

ET01 3.95 <0.500 <0.500

ET02 8.59 <0.500 <0.500

ET02 (field duplicate) 10 <0.500 <0.500

ET03 12.1 <0.500 <0.500

ET04 23.8 <0.500 <0.500

Notes:

Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results on a dry 

weight basis.

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4. FINDINGS

More than 2,000 samples of various media, including ground water, surface water, fish, soil and 

sediments, were evaluated from October 2004 to December 2012 for the 3M Decatur Alabama 

facility under the sulfonate sampling program. Sulfonate sampling has been performed by 3M on 

a voluntary basis in conjunction with sampling performed under the PFOA MOU Program. The 

PFOA MOU program was conducted in a phased manner (i.e., Phase 1, 2 and 3). The sulfonate 

sampling results associated with the Phase 1 and 2 MOU activities (October 2004 through 

December 2006) were provided to the EPA in the PSDR in September 2008. 

The following subsections present the key findings from sulfonate sampling associated with 

Phase 3 of the MOU program. In addition, this subsection presents findings related to the 

supplemental data collection activities performed for remedial design purposes and the 

associated monitoring program between March 2010 and September 2013. 

The following subsections contain summaries of the findings for analytical data received after 

the September 2008 PSDR was submitted to the EPA. 

4.1 SOIL AND SEDIMENT 

4.1.1 On-Site Soil

Analytical data for on-site soil sulfonate concentrations, including surface (0 to 6 inch bgs) and 

subsurface (1 to 1.5 ft bgs) soil samples in the FSIA Fields 5, 8C and 11, are summarized in 

Table 3-1 and Figure 3-1.

PFOS concentrations were the highest among the three sulfonate analytes with some readings at 

ppm levels. On the basis of this additional characterization data, the areas associated with these 

sampling locations are in the process of being covered in the FSIA capping program (see 

Subsection 2.5). 

4.1.2 MOU Phase 3 Off-Site Soil and Sediment at the WEEC

Soil and sediment sulfonate data in the WEEC area were collected in June 2010 and are provided 

in Table 3-2 and Figure 3-2. 
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• PFOS concentrations were the highest detected sulfonate concentrations in the WEEC 

swamp area, followed by PFHS and PFBS, respectively. 

• Generally, sulfonate concentrations detected in the WEEC upland soil (i.e., locations 

with the WEU prefix) were detected at lower concentrations than the WEEC swamp 

samples along each corresponding transect. 

• PFBS in the WEEC soil/sediment ranged from 0.174 to 1.30 ppb. PFHS 

concentrations in the WEEC soil/sediment areas ranged from 0.400 to 5.30 ppb. 

PFOS concentrations in the WEEC soil/sediment ranged from 57.0 to 775 ppb. These 

concentrations are in the same general ranges as those found on-site in background 

areas. Detections of PFBS, PFHS and PFOS in on-site background areas ranged from 

0.241 to 1.62 ppb, 0.271 to 1.40 ppb and 11.5 to 278 ppb, respectively. 

4.1.3 Off-Site Soil

Analytical data on off-site surface soil sulfonate concentrations within 2 to 3 miles of the 3M 

Decatur facility, including surface and subsurface soil samples collected during the off-site 

monitoring well installation, are summarized in Table 3-3 and Figure 3-3. 

• At the off-site Phase 3 monitoring well locations, the highest PFBS, PFHS and PFOS 

concentrations in soil were generally found in the top 2 feet with decreasing 

concentrations with depth. PFOS concentrations were the highest of the sulfonate 

concentrations detected. PFBS, PFHS and PFOS were not detected in soil samples 

collected at and below 11 ft bgs. 

• The highest PFOS soil concentrations were detected in the boring for monitor well 

610S located southeast of the facility (<0.200 to 36.1 ppb). The detected PFOS 

concentrations for the remaining Phase 3 well locations (607R, 609R, 611R, MW-47 

and MW-121) were at or below 24.0 ppb. PFBS and PFHS were also detected in the 

610S soil boring samples at higher concentrations than in the other off-site 

monitoring wells. 

• These detected PFOS concentrations from the Phase 3 off-site monitoring well 

locations were less than the detected PFOS concentrations in on-site background 

areas. PFOS concentrations in on-site background area surface soils ranged from 11.5 

to 278 ppb, whereas detected PFOS concentrations in soil samples collected from the 

Phase 3 off-site monitoring well locations ranged from 9.08 to 36.1 ppb. 

4.2 GROUNDWATER 

4.2.1 Hydrogeology

The hydrogeologic data collected during the Phase 3 activities, in conjunction with previous 

LOI, Phase 2 and supplemental assessment data, provide the basis for the hydrogeologic model 
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for the 3M Decatur facility, areas immediately surrounding the facility, and landfill facilities in 

the area. 

The water-bearing zones that are evident at and adjacent to the 3M Decatur, Alabama facility 

include (1) a residuum shallow water-bearing zone, also referred to as the water table, within this 

soil layer; (2) an epikarst middle water-bearing zone within the portion of bedrock that exhibits 

transitional weathering from completely weathered rock (i.e., saprolite residuum soil) to the 

underlying competent bedrock; and (3) a bedrock water-bearing zone within the fractures and 

solution cavities of the limestone bedrock. 

Hydrogeologic data indicate the preferred pathway for groundwater flow is associated with the 

base of the residuum and within the epikarst zone. Groundwater data indicate the contact 

between these hydrostratigraphic zones is transitional; however, due to the higher permeability 

exhibited within the zone, the epikarst zone is the most transmissive and is believed to be the 

preferred pathway for lateral groundwater flow.

Generally, groundwater gradients on-site appear to mimic surface topography. Groundwater 

originates at an elevation high located in the northern portion of the FSIA (Field Nos. 6 and 9). 

From this area, groundwater in each of the groundwater zones flows radially in all directions. 

Additionally, groundwater elevations within the FSIA indicate restricted downward vertical 

movement between the three groundwater zones with vertical communication occurring only in 

localized areas.

Off-site wells were installed as part of the Phase 2 and Phase 3 programs to monitor off-site 

groundwater conditions and to confirm the predicted groundwater flow directions from the site. 

These data were supplemented by additional groundwater data from local landfill sites and from 

monitoring on the BP property west of the 3M facility. The findings related to regional 

groundwater flow characteristics are as follows:

• In general, regional groundwater flow is northerly toward the Wheeler Reservoir. 

Similar to on-site residuum groundwater flow, the groundwater gradient for the 

residuum hydrostratigraphic zone mimics surface topography. 
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• Groundwater elevation data indicate that a trough in the groundwater surface occurs 

immediately southwest to south of the 3M property, which captures groundwater, 

conveys it to Bakers Creek and the Tennessee River, and restricts groundwater flow 

from the 3M property beyond this feature. Additional evidence that this feature acts 

as a hydraulic barrier is provided by the distribution of PFOS analytical data, which 

suggests capture of PFOS in groundwater from areas north of this convergence, 

directing the flow east toward Bakers Creek.

• In the residuum groundwater zone, a prominent groundwater elevation high under the 

FSIA causes groundwater in the residuum to flow radially in all directions. To the 

west, this flow converges with the flow from a second groundwater elevation high 

observed on the BP property and the regional groundwater flow from the south 

towards the Wheeler Reservoir, resulting in a line of groundwater convergence 

originating west of the FSIA and continuing south to east to north, surrounding the 

3M property. This feature and the prominent northerly groundwater gradient south of 

the property act to restrict groundwater flow from the property to the south or west 

beyond the convergence figure. Residuum groundwater contours are provided in 

Figure 3-13. 

4.2.2 On-Site Groundwater 

On-site groundwater sampling occurred quarterly from March 2010 through March 2013. The 

well locations and sulfonate analytical data are summarized in Tables 3-5 through 3-13. The 

latest round of groundwater results for the chemical plant area and the FSIA are shown in 

Figures 3-4 and 3-5, respectively. The groundwater sulfonate concentrations for the WWTP area 

extraction wells from June 2012 to June 2014 are shown in Figure 3-8. 

4.2.2.1 Chemical Plant and Closed Landfill 

• The highest PFBS concentrations in this area were detected in certain wells in the 

chemical plant area (310R, 330R, 330L and 335R), excluding extraction well 

RW312R and the GRS04 sample (see below). In September-October 2013, PFBS 

concentrations in these wells were at or above 1,240 ppb. All other wells sampled in 

September to October 2013 had concentrations at or below 430 ppb (Table 3-5). 

• The highest PFHS concentrations in this area were detected in the residuum well 

335R in the chemical plant area. In September-October 2013, the PFHS concentration 

in this well was 1,660 ppb. The PFHS concentrations in all other wells, excluding 

extraction well RW312R and the GRS04 sample (see below), were at or below 459 

ppb (Table 3-6).

• The highest PFOS concentrations in this area were detected in the residuum well 

335R in the chemical plant area. In September-October 2013, the PFOS concentration 

in this well was 6,480 ppb. The PFOS concentrations in the other wells, excluding 
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4-5

extraction wells RW312R and the GRS04 sample (see below), were at or below 832 

ppb (Table 3-7).

• The highest PFBS, PFHS and PFOS concentrations are consistently detected in 

RW312R and GRS04. RW312R is the extraction well in the chemical plant area and 

GRS04 samples are composite samples of multiple maintenance pumping wells in the 

closed landfill area. Groundwater from the maintenance pumping wells and the 

chemical plant area is piped to an on-site GWTP and is effectively treated with GAC. 

• The lowest sulfonate concentrations are found in bedrock well 317L in the chemical 

plant area. The highest sulfonate concentration detected in this well was PFOS 

detected at 2.44 ppb in March 2010. Concentrations of PFBS, PFHS and PFOS in this 

well are typically less than 1 ppb. 

4.2.2.2 Former Sludge Incorporation Area

• Between June 2010 and March 2014, the highest PFBS concentrations were detected 

in residuum groundwater in Field 8b at the 135R well (ranging from 60.8 to 83.0 ppb) 

and in Field 9 at the 131R well (ranging from 36.6 to 81.2 ppb). PFBS concentrations 

in groundwater generally decrease with depth (i.e., residuum groundwater typically 

having the higher concentration) (Table 3-8).

• The highest PFHS concentrations, ranging from 720 to 844 ppb, were detected in 

residuum groundwater in Field 8b at the 135R well. Wells 131R in Field 9 and 134R 

in Field 8b have had somewhat lower levels, ranging from 182 to 413 ppb and 358 to 

561 ppb, respectively. PFHS concentrations in groundwater generally decrease with 

depth (Table 3-9).

• The highest PFOS concentrations, ranging from 1,120 to 1,720 ppb, were detected in 

residuum groundwater in Field 9 at the 131R well. Wells 134R and 135R in Field 8b 

and CW26L in Field 6 have been observed with slightly lower levels, ranging from 

943 to 1570 ppb, 892 to 1,470 ppb and 848 to 1,550 ppb, respectively. PFOS 

concentrations in groundwater generally decrease with depth (Table 3-10).

• The lowest PFOS concentrations generally occurred in Field 14 where no sludge was 

incorporated. In the Field 14 well cluster 137, PFBS, PFHS and PFOS concentrations 

were consistently among the lowest concentrations detected in each sampling event. 

• The groundwater concentration results are generally consistent with the 

concentrations reported in the earlier PSDR. 

4.2.2.3 Wastewater Treatment Plant (WWTP) Area Extraction Wells

• Sulfonate concentrations from groundwater extraction wells WW8R and WW9R have 

been generally consistent across the period of record. Sulfonate concentrations have 

generally been higher in WW8R compared to WW9R. PFOS has been detected at 

greater concentrations than PFBS and PFHS in these two wells.
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• Concentrations in WW8R have ranged from 263 to 575 ppb, 1,160 to 2,610 ppb and 

3,840 to 5,790 ppb for PFBS, PFHS and PFOS, respectively. 

• Concentrations in WW9R have ranged from 184 to 341 ppb, 954 to 1,550 ppb and 

2,550 to 5,420 ppb for PFBS, PFHS and PFOS, respectively. 

• Concentrations in the two new WWTP area extraction wells WW10R and WW11R 

are similar, with maximum concentrations of 303, 1,120 and 3,890 ppb, respectively, 

for PFBS, PFHS and PFOS (Table 3-13). 

4.2.3 Off-Site Groundwater

The off-site groundwater analytical data are summarized in Tables 3-15 through 3-17 and 

provided in Figure 3-9. 

The findings of the off-site groundwater monitoring are as follows: 

• Off-site groundwater PFBS, PFHS and PFOS concentrations for the March and April 

2012 sampling event were generally consistent with previous sampling events, In 

April 2012, the highest sulfonate concentrations detected in off-site wells were PFBS 

detected in bedrock well 604L at 0.449 ppb, PFHS detected in bedrock well 602L at 

0.252 ppb and PFOS detected in residuum well 604R at 1.12 ppb. PFBS and PFHS 

concentrations at the off-site wells were one to three orders-of-magnitude lower than 

the on-site groundwater concentrations, and PFOS concentrations at the off-site wells 

were one to two orders-of-magnitude lower than the on-site groundwater 

concentrations. 

• The highest PFBS concentrations were generally detected in the residuum/epikarst 

groundwater monitoring samples from the off-site well clusters with the exception of 

the 604 and 610 well clusters located southeast of the facility where the bedrock well 

concentrations were higher. 

• The highest PFHS concentrations were detected in the bedrock groundwater 

monitoring samples from the off-site well clusters with the exception of the 604 wells 

located directly east of the facility and Bakers Creek and the 603 wells located 

southwest of the facility where levels were approximately the same. 

• The highest PFOS concentrations were detected in bedrock monitoring in the off-site 

well clusters with the exception of the 604 (both rounds) and 611 (March 2012 round 

only) well clusters located directly east of the facility and Bakers Creek and the 603 

well clusters located southwest of the facility. 
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4.2.4 Phase 3 Assessment of Off-Site Regional Waste Disposal Facilities

As part of Phase 3 MOU activities, groundwater samples were collected from selected 

monitoring wells at three off-site disposal facilities that were identified to have received wastes 

from the 3M Decatur facility that could contain sulfonates. It should be noted that there are no 

known downgradient receptors for groundwater downgradient of the three off-site disposal 

facilities (see Subsection 3.2.4). Analytical data for the groundwater samples collected at these 

facilities are summarized in Tables 3-18, 3-19 and 3-20 and Figures 3-10, 3-16 and 3-17. 

Morgan County Landfill 

• The highest PFBS, PFHS and PFOS concentrations were detected in the 

downgradient wells at well clusters MW1 and MW2. In November 2010, the highest 

PFOS concentration was 14.8 ppb in MW2B (bedrock well), whereas the highest 

PFBS and PFHS concentrations were 2.26 and 3.28 ppb, respectively, in MW1B 

(bedrock well).

• In November 2010, PFBS and PFHS were detected at low concentrations at MW13, 

the upgradient control well. PFBS was detected in the residuum, epikarst and bedrock 

wells at 0.0957, 0.0843 and 0.0987 ppb, respectively. PFHS was detected in the 

residuum, epikarst and bedrock wells at 0.0559, 0.0526 and 0.0717 ppb, respectively. 

PFOS was non-detect in the MW13 well cluster in November 2010. MW13 was 

sampled again in April 2012 and, other than a detection of PFOS at 0.0376 ppb in the 

bedrock well, produced similar results. 

• Based upon a review of documents related to the site, obtained from an ADEM file 

search, groundwater gradient data indicate a north to northeast groundwater flow 

direction at the site. 

BFI Morris Farm Landfill 

• The highest PFBS concentration detected at the BFI Morris Farm landfill was 5.03 

ppb at MW13D (bedrock well). The highest PFHS and PFOS concentrations detected 

at the BFI Morris Farm landfill wells were 12.8 ppb and 22.5 ppb, respectively, at the 

downgradient MW04 residuum well. 

• At the upgradient monitoring location, PFBS, PFHS and PFOS were present at 

concentrations less than 0.25 ppb in the MW10 residuum well. Only PFHS was 

detected at 0.0281 in the W10D bedrock well. 

• Based upon a review of documents related to the site, obtained from an ADEM file 

search, groundwater gradient data indicate an easterly groundwater flow direction at 

the site.
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Browns Ferry Road Site 

 The highest PFBS and PFHS concentrations in the BFRS groundwater were 3.91 ppb 

and 19.6 ppb, respectively, at the downgradient MW3R residuum well in August 

2013. The highest PFOS concentration in the BFRS groundwater was 25.1 ppb at the 

downgradient MW7R residuum well in August 2013. 

 At the upgradient location, PFBS was detected at a concentration of 0.0269 ppb in 

only the October 2012 sample from the MW9R residuum well. PFHS was at or below 

0.0848 ppb in the MW9R residuum in groundwater and not detected in bedrock 

groundwater. The highest PFOS concentrations at the MW9 cluster were 0.214 ppb in 

residuum groundwater and 0.0445 ppb in bedrock groundwater. 

 Based upon groundwater level measurements taken at the site, it is noted that the 

groundwater gradient is to the northeast at the site. 

4.3 FISH SAMPLING 

The following subsections summarize the findings from the 2012 fish sampling in the Tennessee 

River. Sulfonate analytical data from the fish tissue sampling are summarized on Table 3-21 and 

Figure 3-18 for the April 2012 study and on Table 3-23 and 3-20 through 3-22 for the Fall 2012 

study. 

April 2012

 PFOS was detected in every fish specimen collected in the April 2012 sampling 

event. The median filet tissue PFOS concentrations were 624 ppb, 1,930 ppb and 979 

ppb in the upper, middle and lower reaches of the confluence area where Bakers 

Creek flows into the Tennessee River, respectively. A detailed analysis of PFOS 

concentrations in fish tissue samples from the April 2012 sampling of fish tissue in 

Bakers Creek is provided in Appendix B. 

Fall 2012 

 PFBS was infrequently detected in largemouth bass and channel catfish filet tissue 

samples from the November 2012 sampling event. Of the 150 specimens sampled, 

PFBS was detected in 12 of the 75 largemouth bass samples and 17 of the 75 channel 

catfish samples. The highest filet tissue PFBS concentrations were 2.21 

(2.04-duplicate) ppb in a largemouth bass sample from Reach 05 (Mouth of Bakers 

Creek) and 3.02 ppb in a channel catfish sample from Reach 11 (Mouth of Mallard 

Creek). 
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• PFHS was generally not detected in largemouth bass and channel catfish filet tissue in 

the November 2012 sampling event. Of the 150 specimens sampled, PFHS was 

detected in 4 of the 75 largemouth bass samples and 1 of the 75 channel catfish 

samples. The highest PFHS concentration in a largemouth bass tissue sample was 

0.783 (<0.893-duplicate) ppb in Reach 05 (Mouth of Bakers Creek). The only 

channel catfish PFHS detection was 1.54 ppb in Reach 09 (Mouth of Fox Creek). 

• PFOS was detected in every fish specimen collected in the November 2012 sampling 

event. The median filet tissue PFOS concentrations ranged from 25.7 ppb in Reach 03 

(backwater area at RM 307.5) to 435 ppb in Reach 05 (Mouth of Bakers Creek). 

Median catfish filet tissue PFOS concentrations ranged from 1.50 ppb in Reach 01 

(RM 320) to 283 ppb in Reach 05 (Mouth of Bakers Creek). For both species of fish 

evaluated, the highest median PFOS concentrations occurred along the industrialized 

southern shoreline in the immediate vicinity of the City of Decatur. A detailed 

analysis of PFOS concentrations in fish tissue samples from this stretch of the 

Tennessee River indicates that PFOS concentrations have been declining since the 

early 2000s (WESTON, 2013e). 

4.4 SURFACE WATER

The analytical data on surface concentrations in the Wheeler and Wilson Reservoirs of the 

Tennessee River from the 2012 surface water sampling events are summarized in Table 3-22 and 

Figure 3-19 for the April 2012 study and in Tables 3-24 and 3-25 and Figures 3-23 and 3-24 for 

the Fall 2012 study. 

April 2012 Surface Water 

• PFOS concentrations for single samples collected in the lower, middle and upper 

reaches of the confluence area where Bakers Creek flows into the Tennessee River 

were 0.450, 0.691 and 0.0237 ppb, respectively. 

Fall 2012 Surface Water Transects 

• Sulfonate concentrations from surface water transect sampling suggest bank-attached 

flow with slow mixing downriver. The highest sulfonate concentrations and the 

principal sources of PFOS enter the river along the industrialized southern shoreline 

in the vicinity of the City of Decatur. 

• Upstream of the 3M Decatur facility, surface water PFBS and PFHS concentrations 

are typically non-detect and PFOS concentrations range from 0.006 to 0.020 ppb, 

with a median concentration of 0.007 ppb. 
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• The PFOS concentrations were the highest of the three sulfonates analyzed from the 

Tennessee River surface water samples in fall 2012. The PFOS concentrations in the 

surface water samples ranged from 0.00611 ppb in the middle of Transect 3 (at the 

confluence of Betty Rye Creek and Dry Branch with the Tennessee River at RM 303) 

to 0.138 ppb at the southernmost point along Transect 4 (closest location to Bakers 

Creek mouth at RM 301). 

• The PFOS results for Transect 1, the farthest upstream transect, are consistent across 

the river’s width and ranged from 0.00613 to 0.00689 ppb with a median PFOS 

concentration of 0.00653 ppb. For the area in this study, these transect results 

establish the upstream background levels in surface water. 

• A detailed analysis of the surface water trends since the early 2000s indicates 

generally declining levels of PFOS in the surface water (WESTON, 2013e). 

Fall 2012 Fish Sampling Reach Surface Water 

• Sulfonate concentrations detected in the surface water samples collected within the 

individual fish sampling reaches were generally consistent with concentrations at the 

associated surface water transect sampling nodes.

• PFOS concentrations were the highest sulfonate concentrations detected and ranged 

from 0.00639 ppb in Reach 03 (in the backwater area across from Point Mallard at 

RM 307.5) to 0.385 ppb in Reach 05 (Bakers Creek mouth at RM 301).

4.5 CHARACTERIZATION ACTIVITIES IN SUPPORT OF REMEDIAL DESIGN

Sulfonate samples were voluntarily collected by 3M in conjunction with non-MOU supplemental 

activities as well as those previously described. These non-MOU supplemental activities are 

primarily associated with on-site remediation efforts and a separate off-site assessment program. 

Areas where specific PFC mitigation measures are proposed, underway or already completed

on-site are identified in Table 4-1. Figure 4-1 shows the locations of the identified areas. 

In Table 4-1, the primary media affected by the respective remedial actions taken are listed. In 

addition to mass removal or isolation of PFC-containing material in these locations, secondary 

benefits are also anticipated. For example, removal of PFC-containing soil and sediment from 

drainageways is expected to result in a corresponding decline in PFC concentrations in 

drainageway surface water and, thus, reductions in releases to surface water features.
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4.5.1 Avenue A Drainageway

3M conducted assessment activities in areas that are upgradient to the Avenue A drainageway in 

June and July 2010 and in January 2011 to identify potential sources for the PFOA that was 

detected in the Avenue A drainageway during MOU Phase 2 monitoring. The results of these 

supplemental assessments are summarized in Tables 3-26 through 3-28 and Figures 3-26 through 

3-28 and are discussed below:

• In June and July 2010, PFBS concentrations ranged from 2.59 to 447 ppb in the 

shallow residuum groundwater and from 0.764 to 279 ppb in surface water. PFHS 

ranged from 7.63 to 420 ppb in the shallow groundwater and from 3.68 to 1,130 ppb 

in surface water. PFOS ranged from 17.5 to 1,780 ppb in the shallow groundwater 

and from 104 to 850 ppb in surface water. For PFBS, PFHS and PFOS, the highest 

concentrations in shallow groundwater were detected north and west of the closed 

landfill at locations GP10 and GP11 and near the Fire Training Area (FTA) at 

locations GP07 and GP08. The highest sulfonate concentrations in surface water were 

detected in the on-site marsh area west of the closed landfill and in a drainage feature 

north of the closed landfill. 

• In supplemental groundwater samples collected in the western marsh area and at well 

210R adjacent to the FTA in January 2011, sulfonate concentrations in the 210R 

residuum well had the highest sulfonate concentrations with 43.2 ppb PFBS, 309 ppb 

PFHS and 539 ppb PFOS. 

• In the January 2011 soil and sediment samples, the highest PFBS concentrations were 

detected in soil samples collected from the marsh to the west of the closed landfill 

(19.7 to 35 ppb; SS25). With the exception of the SS25 location, PFBS concentrations 

in sediment samples collected in the marsh to the west of the closed landfill were 

greater than the adjacent soil PFBS concentrations. Median PFBS concentrations 

were 8.2 ppb in sediment and 1.2 ppb in soil. 

• In the January 2011 soil and sediment samples, the highest PFHS concentrations 

occurred in soil and sediment samples collected from the marsh to the west of the 

closed landfill. The highest concentration of PFHS was detected in a surface soil 

sample from the area west of the closed landfill (SS25) at 607 ppb. 
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4-12

• In the January 2011 soil and sediment samples, the highest PFOS concentrations were 

present in soil and sediment samples collected from the marsh to the west of the 

closed landfill. However, two locations in the vicinity of the FTA (SS10 and SS12) 

had PFOS concentrations comparable to those in the marsh area. The highest 

concentration of PFOS in the marsh area samples was 4,060 ppb in the 0- to 0.5-foot 

depth interval sample at location SD22, and the highest PFOA concentration in the 

FTA samples was 5,830 ppb in the 0.5- to 1-foot depth interval sample at location 

SS12. Although PFOS concentrations in the FTA were generally less than 500 ppb, 

the majority of the samples in the marsh area had PFOS concentrations greater than 

500 ppb. 

• After completion of the sampling activities described above, 3M developed a work 

plan to remove soil from the FTA to a depth of 1 to 2 ft bgs followed by surface 

restoration. The soil removal project commenced in June 2012 with ADEM’s 

approval and was completed in August 2012. Excavated soil was placed under the 

FSIA cap.

• Based on the results of the Avenue A characterization program, 3M is undertaking 

capping and dredging activities in the Avenue A drainageway area with projected 

completion in 2016. 

4.5.2 On-Site Soil Sampling Adjacent to FSIA Field 6

A supplemental assessment was performed in December 2012 at three locations in an area to the 

east of FSIA Field 6 to determine whether any remedial response actions should be considered 

for this area. Soil samples were collected in this wedge of land next to the existing railroad spur 

to assess needs and options for remediating the area. The supplemental activities were not 

included in the Phase 3 Work Plan scope but are described in Subsection 3.5.2. The results of 

these supplemental assessments are summarized in Table 3-29 and Figure 3-29 and are discussed 

below: 

• PFBS concentrations in surface soil ranged from 0.373 to 0.423 ppb in the 0 to 0.5 ft 

bgs sampling intervals and from 1.67 to 64.8 ppb in the 5 to 5.5 ft bgs sampling 

intervals.

• PFHS concentrations in surface soil ranged from 3.56 to 33.3 ppb in the 0 to 0.5 ft 

bgs sampling intervals and from 5.04 to 270 ppb in the 5 to 5.5 ft bgs sampling 

intervals.

• PFOS concentrations in surface soil collected from these three locations ranged from 

112 to 3,890 ppb in the 0 to 0.5 ft bgs sampling intervals and from 3.86 to 1,730 ppb 

in the 5 to 5.5 ft bgs sampling intervals. 
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4-13

As a result of this sampling, soils from this area will be excavated and placed under the cap as 

part of the FSIA capping program.

4.5.3 Browns Ferry Road Site

Supplemental assessments were performed in February 2012, October 2012 and August 2013 at 

the BFRS. The results of these additional characterization activities are summarized in Tables 3-

30 and 3-31 and Figures 3-30 and 3-31. 

• On-site surface water sulfonate concentrations in samples collected in February 2012, 

October 2012 and August 2013 were generally consistent between sampling events. 

The only exception was the PFOS levels at ET04 (the northernmost sampling location 

in the eastern tributary), which were 4.30 ppb in February 2012, 0.200 ppb in October 

2012 and 0.109 ppb in August 2013. 

• Between October 2012 and August 2013, PFBS concentrations ranged from <0.0250 

to 0.115 ppb, and PFHS concentrations ranged from <0.250 to 0.232 ppb in surface 

water samples. Excluding the 4.30 ppb PFOS detected in ET04 in February 2012, 

PFOS concentrations ranged from <0.0250 to 0.303 ppb at locations within or 

downstream of the BFRS. At the off-site cross-gradient Dry Creek sample location, 

the PFOS concentration was 1.54 ppb. 

• PFBS and PFOS concentrations in surface water samples collected from off-site 

locations downgradient of the site (i.e., ET05 and WT01) in October 2012 were 

approximately equal to or lower than concentrations at on-site surface water sampling 

locations. PFHS concentrations at the off-site eastern tributary and western tributary 

sampling locations (approximately 0.07 ppb) were higher than those at the upstream 

on-site sampling locations (approximately 0.04 ppb). 

• On-site sediment PFBS concentrations from the February 2012 sampling event 

ranged from 3.95 (ET01) to 23.8 ppb (ET04). PFHS and PFOS were not detected in 

any of the February 2012 sediment samples.
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SECTION 4

FIGURES
Field 12

Field 13

Goose 

BP Property Pond

Bakers 

Creek

Closed

 Landfill

Finley Island Road

Field 9

Norfolk Southern Railroad

Field 6

Field 8a

Field 3

Field 6 Field 2

Field 7

Field 1

Field 8a Field 4

State Docks Road

Field 10

Field 11

Field 5

Nebo Road

Highway 20/72

Field 14

Tennessee River/

Wheeler Reservoir

Film 

Plant

Chemical 

Plant

Field 8c

Daikin

Wastewater

Treatment

Plant Area

Former

Sludge

Incorporation 

Area

WEEC/Off-Site

Pond/Marsh

Fire Training

Area

Avenue A

Ditch

Wetlands Edge

Enviromental Center

(WEEC)

Former Sludge Basins

(Closed)

Area North of 

Closed Landfill

Marsh West of

Closed Landfill

Field 12

Field 13

Goose 

BP Property Pond

Bakers 

Creek

Closed

 Landfill

Finley Island Road

Field 9

Norfolk Southern Railroad

Field 6

Field 8a

Field 3

Field 6 Field 2

Field 7

Field 1

Field 8a Field 4

State Docks Road

Field 10

Field 11

Field 5

Nebo Road

Highway 20/72

Field 14

Tennessee River/

Wheeler Reservoir

Film 

Plant

Chemical 

Plant

Field 8c

Daikin

Wastewater

Treatment

Plant Area

Former

Sludge

Incorporation 

Area

WEEC/Off-Site

Pond/Marsh

Fire Training

Area

Avenue A

Ditch

Wetlands Edge

Enviromental Center

(WEEC)

Former Sludge Basins

(Closed)

Area North of 

Closed Landfill

Marsh West of

Closed Landfill

μ 0 500 1,000

Feet

Legend:

3M Decatur, AL Facility

Daikin Property

File: Y:\3MDec\MXD\NPDES_site_features.mxd, 8/21/2014 3:33:15 PM, ricksc

Figure 4-1

Site Features & NPDES

Remedial Action Agreement 

Mitigation Areas

Buildings

3M Decatur Property Boundary
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SECTION 4

TABLES
Table 4-1 

Site Features and NPDES Remedial Action Agreement Mitigation Areas

3M Decatur, AL Facility

Former Sludge Incorporation Area Soil Capping of FSIA fields with FML and soil. Revegetate per E&S requirements 2008 - Ongo

WEEC Pond Sediment / Soil

Remove top 3 feet of sediment. Replace removed sediments 

with clean fill. Line pond with FML. Place sediments under 

FSIA multilayer cap.

2008 - 200

Fire Training Area Soil Remove soil, backfill/surface restoration. Place excavated soils under FSIA multilayer cap. 2012 

WWTP Area Groundwater Install recovery wells and route groundwater to existing groundwater treatment plant 2012 - 201

North of Closed Landfill Sediment / Soil Installation of FML, soil cap to isolate soils / sediment from stormwater runoff and install groundwater extraction wells 2013 - 201

Marsh west of Closed Landfill Sediment Construct soil cap and stormwater diversion to isolate stormwater run-off from sediments 2013 - 201

Avenue A drainageway Sediment Remove sediments from ditch as part of ditch maintenance; place under FSIA multilayer cap 2014 

Notes:E&S = Erosion and SedimentationFSIA = Former Sludge Incorporation AreaFML = Flexible Membrane LinerWEEC - Wetlands Edge Environmental CenterWWTP = wastewater treatment plant

Location Media Description Time Perio

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5-1

5. REFERENCES 

ADEM (State of Alabama Department of Environmental Management). 2008. NPDES Remedial 

Action Agreement Between Alabama Department of Environmental Management and 3M Company. 

NPDES Permit No. AL 0000205. Montgomery County, AL. June27, 2008. 

EPA (U.S. Environmental Protection Agency). 2004. Memorandum of Understanding between 

the U.S. Environmental Protection Agency and 3M Company and Dyneon LLC for a 

Perfluorooctanoic Acid (PFOA) Site-Related Environmental Assessment Program. Effective 

October 25, 2004. 

PCG (Peer Consultation Group). 2008. Report of the Peer Consultation for a PFOA Site-Related 

Environmental Assessment Program for the 3M Property Located in Decatur, Alabama. MenzieCura & Associates, Inc. Severna Park, MD. June 1, 2008. 

WESTON (Weston Solutions, Inc.). 2004. Phase 2 Work Plan for Sampling Environmental 

Media at the 3M Decatur, Alabama Plant. Prepared by Weston Solutions, Inc. for the 3M 

Company, October 2004. 

WESTON (Weston Solutions, Inc.). 2007. January 25, 2007. Quarterly Status Report for the 3M 

and Dyneon LLC Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment 

Program. Prepared by Weston Solutions, Inc. for the 3M Company. January 2007. 

WESTON (Weston Solutions, Inc.). 2008a. Data Assessment Report for the 3M Decatur, 

Alabama Facility PFOA Site-Related Environmental Monitoring Program. Prepared by Weston 

Solutions, Inc. for the 3M Company, January 2008. 

WESTON (Weston Solutions, Inc.). 2008b. Screening Level Human Exposure Assessment 

Report for the 3M Decatur, Alabama Facility PFOA Site-Related Environmental Monitoring 

Program. Prepared by Weston Solutions, Inc. for the 3M Company, January 2008. 

WESTON (Weston Solutions, Inc.). 2008c. Future Data Needs Assessment Report for the 3M 

Decatur, Alabama Facility PFOA Site-Related Environmental Monitoring Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, January 2008. 

WESTON (Weston Solutions, Inc.). 2008d. Status Report. Perfluorooctanoic Acid (PFOA) Site 

Related Assessment Program. Prepared by Weston Solutions, Inc. for the 3M Company, August 

2008. 

WESTON (Weston Solutions, Inc.). 2008e. Perfluorinated Sulfonates Data Report for the 3M 

Decatur, Alabama Facility Site-Related Environmental Monitoring Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, September 2008. 

WESTON (Weston Solutions, Inc.). 2009. Phase 3 Work Plan. 3M Decatur Facility PFOA SiteRelated Environmental Monitoring Program. Prepared by Weston Solutions, Inc. for the 3M 

Company, July 2009. 
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5-2

WESTON (Weston Solutions, Inc.). 2010a. March 31, 2010. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, March 31, 2010. 

WESTON (Weston Solutions, Inc.). 2010b. June 30, 2010. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, June 30, 2010. 

WESTON (Weston Solutions, Inc.). 2010c. September 30, 2010. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, September 30. 2010. 

WESTON (Weston Solutions, Inc.). 2010d. December 31, 2010. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, December 31, 2010. 

WESTON (Weston Solutions, Inc.). 2011a. March 31, 2011. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. March 31, 

2011. 

WESTON (Weston Solutions, Inc.). 2011b. June 30, 2011. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, June 30, 2011. 

WESTON (Weston Solutions, Inc.). 2011c. September 30, 2011. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, September 30, 2011. 

WESTON (Weston Solutions, Inc.). 2011d. December 31, 2011. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, December 31, 2011. 

WESTON (Weston Solutions, Inc.). 2012a. March 31, 2012. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, March 31, 2012. 

WESTON (Weston Solutions, Inc.). 2012b. Fish Sampling and Analysis for PFOS in 

Largemouth Bass from the Tennessee River in the Vicinity of the 3M Decatur Facility, May 

2012. Prepared by Weston Solutions, Inc. for the 3M Company. 

WESTON (Weston Solutions, Inc.). 2012c. June 30, 2012. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, June 30, 2012. 

WESTON (Weston Solutions, Inc.). 2012d. Technical Memorandum on Completion of the Phase 

3 Off-Site Groundwater Monitoring Program. Prepared by Weston Solutions, Inc. for the 3M 

Company, September 2012. 
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5-3

WESTON (Weston Solutions, Inc.). 2012e. September 30, 2012. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, September 30, 2012. 

WESTON (Weston Solutions, Inc.). 2012f. October 2012. Revised Work Plan for the Fall 2012 

Fish and Surface Water Sampling in the Tennessee River. Prepared by Weston Solutions, Inc. for 

the 3M Company, October 2012. 

WESTON (Weston Solutions, Inc.). 2012g. December 31, 2012. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, December 31, 2012. 

WESTON (Weston Solutions, Inc.). 2013a. March 31, 2013. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, March 31, 2013. 

WESTON (Weston Solutions, Inc.). 2013b. Tennessee River Perfluorochemical (PFC) 

Assessment, and Surface Water Sampling Report, October – December 2012. Prepared by 

Weston Solutions, Inc. for the 3M Company. June. 

WESTON (Weston Solutions, Inc.). 2013c. June 30, 2013. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, June 30, 2013. 

WESTON (Weston Solutions, Inc.). 2013d. September 30, 2013. Quarterly Status Report. 

Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by 

Weston Solutions, Inc. for the 3M Company, September 30, 2013. 

WESTON (Weston Solutions, Inc.), 2013e. Addendum to the Data Assessment Report for the 3M 

Decatur, Alabama Facility. Prepared by Weston Solutions, Inc. for the 3M Company, November 

2013. 
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APPENDIX A 

LABORATORY DATA PACKAGES 
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APPENDIX A-1 

GLP INTERIM REPORT DATA PACKAGES 
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APPENDIX A-2 

ISO REPORT DATA PACKAGES 
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APPENDIX A-3 

THIRD-PARTY (AXYS ANALYTICAL) DATA PACKAGES 
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APPENDIX B 

FISH SAMPLING AND ANALYSIS FOR PFOS IN LARGEMOUTH BASS 

FROM THE TENNESSEE RIVER IN THE VICINITY OF THE 

3M DECATUR FACILITY (WESTON, 2012b)
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APPENDIX C 

TENNESSEE RIVER PERFLUOROCHEMICAL (PFC) ASSESSMENT 

FISH TISSUE AND SURFACE WATER SAMPLING REPORT 

OCTOBER – DECEMBER 2012 (WESTON, 2013e)