# 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. 02181.129.138.0001J:\ 3M

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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 REDUCTI ON PROCESS ............................................................................................................ 1-4 1.5 REPORT ORGANIZATION ............................................................................... 1-6 2. ENVIRONMENTAL SETTIN G .................................................................................. 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 ACT IVITIES ........................................................................ 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 ACT IVITIES IN SUPPORT O F 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 SED IMENT ...................................................................................... 4-1

# TABLE OF CONTENTS (C ontinued )

Section Page

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- 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 CHARAC TERIZATION ACTIVITIE S IN SUPPORT OF REME DIAL 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)\\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014 

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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 Gr oundwater 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 Concentra tions (March – April 2012) Figure 3-10 Morgan County Landfill Groundwater M onitoring Wells Average PFBS, PFHS and PFOS Concentrations (November 2010 and April 2012) Figure 3-11 Groundwater Average PFBS, PFHS and PFO S Concentrations, Chemical Plant and Closed Landfill Area (April 2012) Figure 3-12 Former Sludge Incorporation Area Gr oundwater Average PFBS, PFHS and PFOS Concentrations (March-April 2012) Figure 3-13 Residuum Groundwater Elevation Contour Map

# LIST OF FIGURES (C ontinued )

Title

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## v 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 Groundwate r 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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## vi Figure 3-29 Area Adjacent to Field 6 Soil PFBS, PFH S 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 PFB S, PFHS and PFOS Concentrations (February 2012) Figure 4-1 Site Features and NPDES Remedial Action Agreement Mitigation Areas\\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014 

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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 Su rface 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 Land fill Wells PFBS Analytical Results (2010 – 2013)

Table 3-6 On-Site Chemical Plant and Closed Landf ill Wells PFHS Analytical Results (2010 – 2013)

Table 3-7 On-Site Chemical Plant and Closed Landf ill 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 Ar ea Pump Test Groundwater PFBS, PFHS and PFOS Concentrations (June and December 2012)

Table 3-12 On-Site Wastewater Treatment Plant Gr oundwater Average PFB S, PFHS and PFOS Concentrations (April 2012)

Table 3-13 On-Site Wastewater Treatment Plant Ex traction 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 TABLE S (C ontinued )

Title

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## viii 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 Rive r – 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 PFB S, 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 TABLE S (C ontinued )

Title

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## ix 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 AreasJ:\ 3M

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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 fiel d 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 (C ontinued )

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## xi PFBS per fluorobutane 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/q uality 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 plantJ:\ 3M

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- 1 

# 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) Site

Related 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 man ufacturing 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:

• Perfluorobut ane 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 perfluori nated 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 MO U 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

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- 2 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 correspon ded 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 (post

Phase 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 a re 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 potentialJ:\ 3M

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- 3 human exposure and migration pathways. This work was conducted with the involvement and approval of the Alabama Department of Env ironmental 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 resu lts 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 HISTO RICAL AND PRESENT PR ODUCTION OF SULFONATE PRODUCTS

The ma nufacturing 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 PFOS

related 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 assessm ent program. Thus, the three compounds analyzed in this voluntary sulfonates characterization program were PFOS, PFHS and PFBS.J:\ 3M

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- 4 1.3 SULFONATES SAMPLING PROGRAM
The sulfonates sampling program was composed of the collection of data in various media and
locatio ns 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 QUAL ITY AND DATA REDUCTI ON PROCESS
Analyses of sulfonate samples (i.e., PFBS, PFHS and PFOS) wer e 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 quant itation (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 orJ:\ 3M

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- 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 availabili ty 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 we re 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 qualit y 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 recov eries 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 ±5 0%. 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.J:\ 3M

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- 6 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 Deca tur 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.J:\ 3M

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# SECTION 1

TABLESMediaLocationPrimary SamplesCollected (Total)Field DuplicateSamples Collected(Total)(11)MediaLocationPrimary SamplesCollected (Total)Field DuplicateSamples Collected(Total)(11)SEMW(2)3232Off-Site(5)3131FSIA MW2323Residential Wells2 2Near SEMW 41 0 SoilOff-Site MW(6)306FSIA Soil(3)32516Tennessee River/Bakers Creek(7)7373VegetationFSIA(3)310Off-Site Marsh33Small MammalsFSIA(4)300Tennessee River/Bakers Creek300AvenueA22Off-Site Marsh & Drainageway424Goose Pond33 PorewaterTennessee River1212Avenue A 6 0Fish - Filet(8)Tennessee River/Bakers Creek 1152Goose Pond2 0Sanitary Wastewater 3M WWTP 1 1496 77Clams Tennessee River/Bakers Creek 12 0Decatur Utilities WTP55Decatur Utilities Supply(9)4 4FSIA = Former Sludge Incorporation AreaWest Morgan/East Lawrence WTP4 4Muscle Shoals WTP3 3SEMW = Selected Existing Monitoring WellsFlorence WTP3 3WTP = Water Treatment PlantTennessee Valley Authority WTP3 3WWTP = Wastewater Treatment PlantSheffield WTP3 3Decatur Utilities WTP1 1West Morgan/East Lawrence WTP1 1Dry Creek WWTP - Influent1 1Dry Creek WWTP - Effluent2 2Sludge Dry Creek WWTP 21LeachateMorgan County Landfill2 2501166(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-site marsh.(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 WaterOn-SiteSedimentsSurface WaterSediment0117SoilTennessee River/Bakers CreekFish - WholeBody(8)Table 1-13M Decatur, AL FacilityOctober 2004 - April 2008Off-SiteGroundwaterSummary of the Sulfonate Sampling ProgramGroundwaterPublic Water(Finished Water)TOTAL(1)ON-SITE SAMPLES:TOTAL(1)OFF-SITE SAMPLES:Raw Water(10)WastewaterMW = Monitoring WellsJ:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_1_1_PSDR_Samples.xlsPage 1 of 1Table 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)
Facilit y 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 A venue 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 Well s 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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- 1 

# 2. ENVIRONMENTAL SETTIN G

2.1 SITE LOCATION AND BA CKGROUND INFORMA TION
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 aJ:\ 3M

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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 d iscussed further in Subsection 2.5.

2.2 TOPOGRAPHY AND DRAIN AGE
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
di rects 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, l ocalized 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 sectio n 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 nor thern 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 manufacturingJ:\ 3M

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- 3 areas that direct flow toward B akers Creek. Surface runoff in the plant production areas is conveyed to the on

- site WWTP for treatment prior to discharge through the site’s NPDES

permitted 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 -s outheast 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 ma naged 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.J:\ 3M

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- 4 • 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 fro m 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 De catur 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 limest one. This unit may be generally described as interbedded gray fine

- grained micrite (fine

grained 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, repre sented 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 rest ricting 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:J:\ 3M

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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. Bor ing 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 semi

confined 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 gro undwater 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

- con fined 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, the se 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.J:\ 3M

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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 INCORP ORATION 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 nitroge n 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. T he 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 veget ation. 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

- im pacted soil from direct human contact, release to the air or contact with stormwater.

• Minimize potential vertical migration to groundwater via infiltration to groundwater.J:\ 3M

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## 2

- 7 This impermeable cap installation program is being performed by 3M under an NPDES
R emedial 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 s ediment from the Avenue A drainageway.J:\ 3M

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# SECTI ON 2

FIGURES504 

## 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 

# U V 24 

# U V 67 

# U V 24

24 6th Beltline Joe Wheeler Wilson

Moulton 72 Wilson 7 2



# U

V 24 

# U V 24 

## Decatur Trinity B B a a k k e e r r s s

C C

r r e e e e k k 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 

# U V 24 

# U V 67 

# U V 24

24 6th Beltline Joe Wheeler Wilson

Moulton 72 Wilson 7 2



# U

V 24 

# U V 24 

## Decatur Trinity B B a a k k e e r r s s

C C

r r e e e e k k



## Figure 2-1 Site Location Map 

# μ

0 1 0.5 Miles 

### 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 RoadsField 12 Field 13 Goose Pond 

## BP Property

Bakers Creek Closed Landfill

Off-Site SwampFinley Island Road Field 9 Norfolk Southern Railroad

Field 6

Field 8a Field 3

Field 2 Field 6

Field 7 Field 1

Field 4 Field 8aState Docks Road

Field 10

Field 11

Field 5Nebo 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 Pond 

## BP Property

Bakers Creek Closed Landfill

Off-Site SwampFinley Island Road Field 9 Norfolk Southern Railroad

Field 6

Field 8a Field 3

Field 2 Field 6

Field 7 Field 1

Field 4 Field 8aState Docks Road

Field 10

Field 11

Field 5Nebo 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 1,000 500 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 LandfillFinley Island Road 

# Field 9 Norfolk Southern Railroad

Field 6

Field 8a Field 3

Field 2 Field 6

Field 1

Field 4 Field 8aState Docks Road



# Field 10

Field 8b Field 11

Field 5Nebo Road



# Highway 20/72 

# SWMU 4

Field 8c 

# DAIKIN

Field 14 (Control Field) Field 7 (Control Field) 

# Field 12 Field 13 

# Closed LandfillFinley Island Road 

# Field 9 Norfolk Southern Railroad

Field 6

Field 8a Field 3

Field 2 Field 6

Field 1

Field 4 Field 8aState Docks Road



# Field 10

Field 8b Field 11

Field 5Nebo Road



# Highway 20/72 

# SWMU 4

Field 8c 

# DAIKIN

Field 14 (Control Field) Field 7 (Control Field)



# Figure 2-3
Former Sludge Incorporation Area 

# μ 0 500 250 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 AreasJ:\ 3M

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## 3

- 1 

# 3. SUMMARY OF FIELD ACT IVITIES

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 descrip tion 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 an d 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 theJ:\ 3M

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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 pr ovided 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:J:\ 3M

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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 proxim ate 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) contemporane ously 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 t he 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 tech niques. 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 MW

121. 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).J:\ 3M

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- 4 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 eig ht 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 2 013) sampling event are depicted in Figure 3 -4. A nalytical 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
ISO1 3-05- 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 wellsJ:\ 3M

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- 5 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 piezo meter 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 ana lytical 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 inJ:\ 3M

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- 6 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 ar ea 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 es tablished 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 S eptember 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 theJ:\ 3M

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- 7 proposed well cluster 608. The use of the four installed Phase 3 well clusters and the two
alternate loc ations 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 t he 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 t he 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 r emaining 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 wa s 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).J:\ 3M

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- 8 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 e vent 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 sa mples 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 se e 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 th e 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 groundwaterJ:\ 3M

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- 9 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 ra dius 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
Deca tur 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 o f 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. TheJ:\ 3M

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- 10 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 alo ng 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
Count y 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 noJ:\ 3M

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- 11 indication of private wells on the site. Based on the regional groundwater gradient and the groundwater data for Morgan Count y 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. Sam pling 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 s ent 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 grou ndwater 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 fileJ:\ 3M

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- 12 search. The second property is located approximately 2 miles southwest of the BFI Morris Farm
landfill alon g 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.J:\ 3M

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- 13 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 nor th 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 groundwaterJ:\ 3M

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- 14 sampling. In February 2012, an additional nine monitoring wel ls 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 (WEST ON, 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 Tenn essee 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 labo ratory at which split samples were analyzed.J:\ 3M

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- 15 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 larg emouth 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 anal ytes (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 duplic ates, 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, P FHS 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 b etween 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 waterJ:\ 3M

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- 16 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

sourc es 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 , Octo ber

- 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 show n 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 packa ge produced by AXYS Analytical laboratories, a third -party laboratory at which split samples were analyzed.

3.5 CHARACTERIZATION ACT IVITIES IN SUPPORT O F ON

- SITE REMEDIAL DESIGN AND OFF

- SITE ENVIRONMENTAL A SSESSMENT

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. A s part of 3M’s commitment to ADEM, a program was initiated to identify and reduce the PFOA sources and discharges at the Decatur facility. U nder 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 collec ted from the Avenue A drainageway, ancillary tributaries andJ:\ 3M

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- 17 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 fro m 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).

So il 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
interv als 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 (Septemb er 2014) \ Sulfonates Report.docx 9/18/2014 

## 3

- 18 3.5.3 Browns Ferry Road Site

In a ddition 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

- sit e 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 5Former 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 0 175 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 0 225 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
Decatur, AL 

# μ

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 2,500 1,250 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 Service331S

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 0 225 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 13Finley Island Road 

### Field 9State Docks Road



### Field 10

Field 11

Field 5Nebo 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 13Finley Island Road 

### Field 9State Docks Road



### Field 10

Field 11

Field 5Nebo 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 0 400 Feet 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 4 Field 8a

Field 8b Field 11

Field 5Nebo Road



# Highway 20/72 Field 8c 144E

145S & < & < 

# Field 8a Field 7

Field 4 Field 8a

Field 8b Field 11

Field 5Nebo Road



# Highway 20/72 Field 8c 144E

145S



## Figure 3-6 Groundwater Average PFBS, PFHS and PFOS Concentrations On-Site Former Sludge Incorporation Area Pump Test June 2012 and December 2012 

# μ 450 0 225 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 0 112.5 Feet 

### 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 June 2012 - June 2014 

# μ 300 0 150 Feet

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

610 MW-13 611-R

605-L

604-L 603-S 602-L 607-R

609-L 

### ! .

! .

! .

! . ! . ! . ! . ! .

! . ! . ! .

! . ! . ! .

! . MW-121 MW-47

610 MW-13 611-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
Decatur, AL 

# μ

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 4,000 2,000 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
Decatur, AL 

# μ

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 1,050 525 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 Nov-10 Well ID 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 April 2012 

# μ 450 0 225 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 13Finley Island Road 

### Field 9State Docks Road



### Field 10

Field 11

Field 5Nebo 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 13Finley Island Road 

### Field 9State Docks Road



### Field 10

Field 11

Field 5Nebo 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 0 400 Feet 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

# μ

0 2,000 1,000 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.

# μ

0 2,000 1,000 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 Facility Map 

# μ 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 0 4,850 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
Decatur, AL 

# μ

File: Y:\3MDec\MXD\Sulfonate\2013\BFI_Morris_Farm_landfill.mxd, 8/27/2014 5:36:51 PM, ricksc 0 750 375 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 0 500 250 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 

# μ

0 1,000 500 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 

# μ

0 1,000 500 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 0.0237Shoal 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 2 4 1 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 - PFBSShoal 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 2 4 1 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 - PFHSShoal 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 2 4 1 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 - PFOSShoal 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 2 4 1 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# * # * # * # * # * # * # * # * # * #

*

# *

# * # * # * # * # * # * # * # *

# * # *

# * # * # * # * # * # * # * # *

# * #

* # # * # # * # * # * # * # * # * # * # * # * # *

# * # * # * # * # * # * # * # * # * # * # *

# * # * # * # * # * # * # * # * # * # *

# * # * # * # * # * # * # * # * # * # * 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 2 4 1 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

Transect 1 T1

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

SW04 SW03

SW02 SW01

GP12 GP11 GP10 GP09 GP08 GP07 GP06 GP05 GP04 GP03

GP01 GP02

216R 

## ! ( ! ( ! ( ! ( ! ( ! (
! ( ! ( ! ( ! (

! (

! ( 

# # * # * # * # * # * # * # *

# *
# *
# *

# * # * ! ( SW12

SW11 SW10 SW09 SW08

SW07

SW06 SW05

SW04 SW03

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 June - July 2010 

# μ 550 0 275 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

## ! (

! (

! ( ! ( ! ( ! (

! (

! ( ! ( ! ( ! ( ! ( ! (
! (
! ( ! ( ! ( ! (

! (

! ( 

# # * # * # * # * # * # * # *

# * # *
# * # *

# * # *
# *

# * # *

# * ! (

! (

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 GP04 GP03

GP01

SS09

SS08 SS07

SS06

SS03 SS02 SS01

SD14 GP02

SS04 

# μ

0 500 250 Feet



### 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

January 2011 

# μ 550 0 275 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

SD26 SD21 SD22 SS25

SS30 SS29

SS19 SS12 SS20 SS18 SS17 SS14

SS15

SS13

SS16 SS10 SS11 SD18



# μ

0 500 250 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 0 100 Feet 

### 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 2,600 5,200 1,300 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 2,600 5,200 1,300 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 ET04J:\ 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

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‐ 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 1Table 3-5On-Site Chemical Plant and Closed Landfill Wells PFBS Analytical Results2010 - 20133M Decatur, AL Facility1Q103Q101Q113Q111Q123Q121Q133Q13Well IDMarch 29 - April 8,2010September 20 - 30,2010March 21 - 28,2011September 19 - 26,2011March 14 - 28,2012September 12 - 20,2012March 21-28,2013September 27 - October 11,2013203L61.970.610523.230.840.235.623.7220R7.4610.08.414.766.906.777.018.12220L11.17.8511.57.878.527.797.944.96222R12912697.662.564.533.642.345.5227R23.816.719.613.414.814.216.815.1227L342376292256220296201259310R386451840730986101011901310317L0.5340.3240.0246<0.0400<0.0250<0.0400< 0.0400<0.0250324L95.789.311270.082.173.071.772.2328R36.031.839.027.931.032.632.333.2328L76.863.171.940.347.941.645.145.3330R44702780302030702120191016001440330L5046365455303973885471340335RNSNS10801080864128013801240RW312R 122014201190114074069911207260RW327R 75.812693.351.662.165.764.561.9RW331S 3499255585259971290842430GRS04 19302410202016902300224020602780Notes: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 = residuumS = epikarstL = bedrockng/mg = nanograms per milligramppb = parts per billionAverage PFBS (ng/mL; ppb)J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3-5_Onsite_GW_PFBS(1Q-3Q).xlsxPage 1 of 1Table 3-6On-Site Chemical Plant and Closed Landfill Wells PFHS Analytical Results2010-20133M Decatur, AL Facility1Q103Q101Q113Q111Q123Q121Q133Q13Well IDMarch 29 - April 8,2010September 20 - 30,2010March 21 - 28,2011September 19 - 26,2011March 14 - 28,2012September 12 - 20,2012March 21-28, 2013September 27 - October 11,2013203L360481595142202257237147220R32.048.734.317.929.828.731.340.3220L53.041.952.037.641.439.836.917.3222R845872607429407223252308227R16997.510661.786.347.37157.1227L63.725562.268.540.115037.282.5310R424453485320328324284307317L0.6910.2370.1190.09840.08770.04720.08640.0986324L10111011182.588.463.072.354.3328R67.768.063.157.957.054.950.551.7328L25.923.622.318.418.718.316.816.9330R258330259196185197152163330L403476625434359300294459335RNSNS203014201600158015701660RW312R 9468426298314944614881300RW327R 154229168126146156140164RW331S 426611292331473409295161GRS04 61907630536060608280841068209340Notes: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 = residuumS = epikarstL = bedrockng/mL = nanograms per milliliterppb = parts per billionAverage PFHS (ng/mL; ppb)J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3-6_Onsite_GW_PFHS(1Q-3Q).xlsxPage 1 of 1Table 3-7On-Site Chemical Plant and Closed Landfill Wells PFOS Analytical Results2010-20133M Decatur, AL Facility1Q103Q101Q113Q111Q123Q121Q133Q13Well IDMarch 29 - April 8,2010September 20 - 30,2010March 21 - 28,2011September 19 - 26,2011March 14 - 28,2012September 12 - 20,2012March 21-28, 2013September 27 - October 11,2013203L852836861478666630778791220R46.070.251.527.433.050.460.978.9220L63.664.683.549.249.566.565.249.5222R9741230781511351403414459227R956852740578616485576657227L28750603634742201840241832310R7608951020611671644644767317L2.44<0.5000.2500.2050.2300.05340.1810.243324L20325731621119410220877.9328R146168217178144147180270328L14.50.6861.331.291.140.8196.11.24330R759802720593462604523682330L145172223169146190182179335RNSNS601033503600456048906480RW312R 17501510101014409929287742860RW327R 639675617397345467346663RW331S 9221180642506850816642461GRS04 14001370NR1330NR210030902820Notes: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 = residuumS = epikarstL = bedrockng/g = nanograms per gramppb = parts per billionAverage PFOS (ng/mL; ppb)J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3-7_Onsite_GW_PFOS(1Q-3Q).xlsxPage 1 of 1Table 3-8On-Site FSIA Monitoring Wells PFBS Analytical Results2010 - 20143M Decatur, AL Facility2Q104Q102Q114Q111Q124Q122Q134Q131Q14Well 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 - July 3, 2013 November 19 - November 21, 2013 March 11 - March 13, 2014130R16.616.616.315.114.614.216.317.816.8130S3.573.503.533.273.543.093.463.784.32130L1.531.771.671.491.531.371.401.431.58131R75.181.254.936.640.236.755.356.968.2131S1.060.7850.8940.6880.8600.8210.8611.070.996131L2.943.353.422.863.132.683.303.852.98132R7.648.03NSNSNSNSNSNSNS132S32.625.9NSNSNSNSNSNSNS132L10.08.89NSNSNSNSNSNSNS133R7.704.614.792.943.043.012.622.852.28133S12.714.09.0811.38.5711.39.269.9410.3133L6.757.656.677.905.878.8713.18.489.53134R59.156.251.447.555.938.449.744.852.1134S0.09380.1430.2580.3640.4280.4090.3900.6580.496134L12.811.911.810.59.808.889.8510.39.89135R83.081.074.364.467.368.760.872.165.1135S0.7350.7991.210.9912.171.051.722.332.26135L6.365.739.697.0910.97.0415.016.311.9136RNS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]136S3.492.553.691.772.582.532.692.973.31136L2.912.532.331.912.322.242.272.522.44137RNS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]137S0.1190.1020.1070.1200.1090.2940.111NS[D]0.188137L0.08470.08230.08260.08680.06790.07640.07500.09120.105138RNS[D]NS[D]8.017.40NS[D]NS[D]NS[D]NS[D]8.68138S5.724.694.573.645.384.814.885.555.83138L0.04630.04730.0391<0.0250<0.0250<0.02500.0481<0.0250.0324140RNC1.631.591.271.591.45NS[D]1.081.47141RNC0.04310.04310.03420.03690.05160.05090.06110.0720142RNC1.681.691.772.081.632.282.312.63143RNCNS[D]1.660.7151.56NS1.67NS[D]1.39144SNC1.951.662.021.99NSNSNSNS145SNCNCNCNC1.501.591.982.280.811CW26R*NS[NA]8.278.23NS[NA]NS[NA]4.727.508.447.64CW26LNS[NA]12.913.5NS[NA]NS[NA]11.812.614.415.8Notes: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 = bedrockNS - Not SampledNS[D] - Not Sampled - DryNS[NA] - Not Sampled - Not AccessibleNC - Not ConstructedAverage PFBS (ng/mL; ppb)J:\3M‐DECAT\2013SulfonatesReport\Final(September2014)\Tables\Table_3‐8_Onsite_GW_PFBS(2Q‐4Q‐1Q).xlsxPage 1 of 1Table 3-9On-Site FSIA Monitoring Wells PFHS Analytical Results2010 - 20143M Decatur, AL Facility2Q104Q102Q114Q111Q124Q122Q134Q131Q14Well 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 - July 3, 2013 November 19 - November 21, 2013 March 11 - March 13, 2014130R119128125119119109132132120130S12.131.329.825.631.027.43133.134.9130L13.014.413.611.712.710.111.711.210.7131R345413304182234210324315370131S5.494.635.074.784.754.685.235.956.08131L19.320.721.618.820.618.222.324.921.6132R36.052.8NSNSNSNSNSNSNS132S211205NSNSNSNSNSNSNS132L78.277.2NSNSNSNSNSNSNS133R45.631.133.120.919.620.515.617.015.5133S77.191.567.279.761.674.671.770.773.4133L39.453.446.958.739.166.510959.372.7134R441503483561556358482398520134S1.331.713.094.224.774.634.497.516.10134L10611211110910390.797.298.792.7135R754839844827765720737800734135S5.886.258.067.9021.210.515.220.926.1135L37.935.971.047.679.449.712912478.5136RNS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]136S19.316.525.811.417.718.819.220.520.2136L11.716.216.012.316.015.015.916.116.5137RNS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]137S<0.1030.09140.08060.1130.09220.2030.0924NS[D]0.265137L<0.1030.1990.1070.09920.08760.09180.08890.1050.114138RNS[D]NS[D]39.235.3NS[D]NS[D]NS[D]NS[D]37.7138S16.923.523.217.826.422.423.724.926.3138L<0.1030.1440.1130.05940.06490.05710.1490.05930.0690140RNC17.217.814.117.715.5NS[D]13.615.0141RNC0.2580.2960.2540.3030.3390.3280.4390.394142RNC9.9810.29.9711.29.3013.3013.014.4143RNCNS[D]6.062.335.69NS6.73NS[D]5.01144SNC8.577.147.549.03NSNSNSNS145SNCNCNCNC7.557.439.559.793.99CW26R*NS[NA]63.167.8NS[NA]NS[NA]50.160.764.057.9CW26LNS[NA]92.9105NS[NA]NS[NA]95.598.2116122Notes: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 = bedrockNS - Not SampledNS[D] - Not Sampled - DryNS[NA] - Not Sampled - Not AccessibleNC - Not ConstructedAverage PFHS (ng/mL; ppb)J:\3M‐DECAT\2013SulfonatesReport\Final(September2014)\Tables\Table_3‐9_Onsite_GW_PFHS(2Q‐4Q‐1Q).xlsxPage 1 of 1Table 3-10On-Site FSIA Monitoring Wells PFOS Analytical Results2010 - 20143M Decatur, AL Facility2Q104Q102Q114Q111Q124Q122Q134Q131Q14Well 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 - July 3, 2013 November 19 - November 21, 2013 March 11 - March 13, 2014130R532583450467405541562578514130S72.111797.690.881144143144148130L74.482.763.766.350.770.970.470.667.9131R172015101510137011201430140012601150131S8.255.555.374.565.87.485.646.836.83131L33.634.332.427.927.339.743.546.445.7132R263295NSNSNSNSNSNSNS132S861633NSNSNSNSNSNSNS132L240293NSNSNSNSNSNSNS133R77.560.842.639.121.244.229.033.825.4133S228224195174160198307254319133L14420414625270.1443738318514134R11801420106015701030943128012601450134S12.611.413.317.513.721.417.528.523.9134L491579493436328484522507501135R104089296911109741100115012001470135S7.164.88NR5.8113.58.0611.815.924.1135L55.422.657.633.859.046.015218592.6136RNS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]136S10687.111659.466.1115120126127136L89.779.269.064.460.992.293.997.294.7137RNS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]NS[D]137S0.4270.3150.4830.5170.3551.010.527NS[D]0.703137L0.7340.8931.961.621.271.411.191.741.69138RNS[D]NS[D]347300NS[D]NS[D]NS[D]NS[D]369138S216245199160200231237251305138L0.7910.5810.8510.4200.3960.3800.6630.4450.362140RNC136128102106150NS[D]119129141RNC4.233.004.875.596.085.277.176.79142RNC10885.594.455.4105166165206143RNCNS[D]23.815.613.7NS25.2NS[D]24.8144SNCNR29.026.713.4NSNSNSNS145SNCNCNCNC49.111813817991.0CW26R*NS[NA]451398NS[NA]NS[NA]384418455436CW26LNS[NA]848934NS[NA]NS[NA]91094713801550Notes: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 = bedrockNS - Not SampledNS[D] - Not Sampled - DryNS[NA] - Not Sampled - Not AccessibleNC - Not ConstructedNR - Not reported due to quality control issuesAverage PFOS (ng/mL; ppb)J:\3M‐DECAT\2013SulfonatesReport\Final(September2014)\Tables\Table_3‐10_Onsite_GW_PFOS(2Q‐4Q‐1Q).xlsxPage 1 of 1

## 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

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-11_FSIA_Pump_Test_GW_PFBS PFHS PFOS.xls 

### Page 1 of 1

## 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

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-12_WWTP_Area_GW_PFBS PFHS PFOS.xls 

### Page 1 of 1Table 3-13On-Site Wastewater Treatment Plant Extraction WellsGroundwater PFBS, PFHS and PFOS Concentrations2012-20143M Decatur, AL FacilityWW8R WW9R WW10R WW11R WW8R WW9R WW10R WW11R WW8R WW9R WW10R WW11R575 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 - -5/31/2013289 226 - - 1330 1120 - - 4180 4210 - -6/27/2013282 225 - - 1340 1140 - - 4110 4150 - -7/23/2013263 212 - - 1260 1030 - - 3910 3670 - -9/30/2013303 249 247 299 1370 1220 1030 1000 4100 4200 2770 220010/28/2013312 286 264 240 1300 1280 1030 511 4410 4380 3160 167011/18/2013362 305 303 287 1440 1340 1120 680 4750 4540 3890 185012/13/2013316 259 239 198 1270 1170 885 512 4060 4190 2920 15701/30/2014326 317 250 168 1460 1460 757 362 3990 4800 1570 15402/27/2014331 270 260 262 1370 1370 935 696 4170 4660 2860 21003/31/2014357 341 278 254 1470 1550 1030 549 5790 5420 3490 18904/23/2014283 257 243 212 1180 1120 885 527 3840 3820 2130 16305/15/2014290 266 220 237 1160 1140 823 649 4230 4790 2680 17506/25/2014285 274 240 250 1240 1270 948 760 4210 4470 2860 2130Notes:Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results.Average PFOS (ng/mL; ppb)SamplePump Test(June 2012)Average PFBS (ng/mL; ppb)Average PFHS (ng/mL; ppb)J:\3M‐DECAT\2013SulfonatesReport\Final(September2014)\Tables\Table_3‐13_WWTP_Area_Extraction_Well_GW_PFBSPFHSPFOS.xlsPage 1 of 1Table 3-14Off-Site Monitoring Well Construction Data3M Decatur, AL Facility601R Residuum BP PropertyNorthwest492-Inch SS601S Epikarst BP PropertyNorthwest80.54-Inch SS601L Bedrock BP PropertyNorthwest1396-Inch OB602R Residuum BP PropertyWest252-Inch SS602S Epikarst BP PropertyWest40.54-Inch SS602L Bedrock BP PropertyWest1536-Inch OB603R Residuum Goss Property Southwest37.52-Inch SS603S Epikarst Goss Property Southwest484-Inch SS603L Bedrock Goss Property Southwest966-Inch OB604R Residuum Davis PropertySouth222-Inch SS604S Epikarst Davis PropertySouth41.54-Inch SS604L Bedrock Davis PropertySouth556-Inch OB605R Residuum Solutia PropertyEast192-Inch SS605L Bedrock Solutia PropertyEast1606-Inch OB138R Residuum FSIA Field 11East202-Inch SS138S Epikarst FSIA Field 11East334-Inch SS138L Bedrock FSIA Field 11East786-Inch OBMW-47 Residuum BP PropertyNorthwest54.824-InchMW-121BedrockBP PropertyNorthwest93.662-Inch607S Epikarst Red Hat RoadWest44.432-Inch607LBedrockRed Hat RoadWest1836-Inch609R Residuum South of Bakers Creek South19.292-Inch609LBedrockSouth of Bakers Creek South56.156-Inch610S Epikarst Ascend Property Southeast41.02-Inch610L Bedrock Ascend Property Southeast55.06-Inch611R Residuum East of Bakers Creek East20.42-Inch611L Bedrock East of Bakers Creek East64.06-InchMW-13SResiduumMorgan County Landfill Southwest24.34-inchMW-13I Epikarst Morgan County Landfill Southwest36.54-inchMW-13BBedrockMorgan County Landfill Southwest61.92-inchNotes:ft bgs = feet below ground surfaceft toc = feet below top-of-casingSS = stainless steelOB = open boreholePhase 3 Off-Site WellsPhase 2 Off-Site WellsWell DiameterWell ID Monitored Zone Well LocationWell Location inProximity to SiteTotal Depth (ft bgs)J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3-14_Offsite_Well_Details.xlsxPage 1 of 1Table 3-15Phase 2 and Phase 3 Off-Site Groundwater PFBS ConcentrationsOctober 2010 - April 20123M Decatur, AL FacilityWell ID October 2010 November 2010 July 2011 September 2011 March - April 2012MW-47 NS NS 0.188 NS 0.174MW-121 NS NS <0.0250 NS <0.0250602S 0.239 NS NS NS 0.288602L 0.0813 NS NS NS 0.0699603S 0.158 NS NS NS 0.177603L 0.112 NS NS NS 0.0946604R NS NS NS NS 0.310604S 0.303 NS NS NS 0.340604L 0.279 NS NS NS 0.449605R 0.119 NS NS NS 0.134605L 0.406 NS NS NS 0.0988607R 0.0870 NS NS NS 0.187607L 0.0615 NS NS NS 0.180609R 0.480 NS NS NS 0.433609L 0.259 NS NS NS 0.348610S* NS NS NS 0.0527 0.0543610L NS NS NS 0.248 0.131611R 0.191 NS NS NS 0.295611L 0.317 NS NS NS 0.261MW-13S 0.0957 0.0957 NS NS 0.0831MW-13I 0.0843 0.0843 NS NS 0.0682MW-13B 0.0987 0.0987 NS NS 0.0803Notes:Average PFBS is the average of primary and duplicate sample analytical results.* Some analytical reports designate 610S as 610RNS = Not SampledWell designationsR = Residuum (shallow) S = Shallow (residuum)S = Epikarst I = Intermediate (epikarst)L = Limestone bedrock B = BedrockAverage PFBS Concentration (ng/mL; ppb)J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3-15_Offsite_Phase3_GW_PFBS.xlsxPage 1 of 1Table 3-16Phase 2 and Phase 3 Off-Site Groundwater PFHS ConcentrationsOctober 2010 - April 20123M Decatur, AL FacilityWell ID October 2010 November 2010 July 2011 September 2011 March - April 2012MW-47 NS NS 0.138 NS 0.113MW-121 NS NS <0.0250 NS <0.0250602S 0.127 NS NS NS 0.182602L 0.291 NS NS NS 0.252603S 0.122 NS NS NS 0.119603L 0.109 NS NS NS 0.108604R NS NS NS NS 0.184604S 0.224 NS NS NS 0.229604L 0.215 NS NS NS 0.227605R 0.0661 NS NS NS 0.115605L 0.622 NS NS NS 0.203607R 0.0707 NS NS NS 0.192607L 0.0823 NS NS NS 0.220609R 0.154 NS NS NS 0.0947609L 0.477 NS NS NS 0.169610S* NS NS NS 0.0832 0.0756610L NS NS NS 0.255 0.136611R 0.0396 NS NS NS 0.128611L 0.167 NS NS NS 0.140MW-13S 0.0559 0.0559 NS NS 0.0404MW-13I 0.0526 0.0526 NS NS 0.0457MW-13B 0.0717 0.0717 NS NS 0.0521Notes:Average PFHS is the average of primary and duplicate sample analytical results.* Some analytical reports designate 610S as 610RNS = Not SampledWell designationsR = Residuum (shallow) S = Shallow (residuum)S = Epikarst I = Intermediate (epikarst)L = Limestone bedrock B = BedrockAverage PFHS Concentration (ng/mL; ppb)J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3-16_Offsite_Phase3_GW_PFHS.xlsxPage 1 of 1Table 3-17Phase 2 and Phase 3 Off-Site Groundwater PFOS ConcentrationsOctober 2010 - April 20123M Decatur, AL FacilityWell ID October 2010 November 2010 July 2011 September 2011 March - April 2012MW-47 NS NS 0.210 NS 0.166MW-121 NS NS <0.0250 NS 0.0307602S 0.710 NS NS NS 0.468602L 0.744 NS NS NS 0.544603S 0.220 NS NS NS 0.417603L 0.102 NS NS NS 0.0905604R NS NS NS NS 1.12604S 0.472 NS NS NS 0.478604L 1.46 NS NS NS 0.811605R 0.0403 NS NS NS 0.0532605L 0.522 NS NS NS 0.213607R 0.0611 NS NS NS 0.274607L 0.0920 NS NS NS 0.322609R 0.164 NS NS NS 0.162609L 2.41 NS NS NS 0.569610S* NS NS NS 0.153 0.275610L NS NS NS 1.41 0.646611R 0.580 NS NS NS 0.650611L 0.933 NS NS NS 0.458MW-13S <0.0250 <0.0250 NS NS <0.0232MW-13I <0.0250 <0.0250 NS NS <0.0232MW-13B <0.0250 <0.0250 NS NS 0.0376Notes:Average PFOS is the average of primary and duplicate sample analytical results.* Some analytical reports designate 610S as 610RNS = Not SampledWell designationsR = Residuum (shallow) S = Shallow (residuum)S = Epikarst I = Intermediate (epikarst)L = Limestone bedrock B = BedrockAverage PFOS Concentration (ng/mL; ppb)J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3-17_Offsite_Phase3_GW_PFOS.xlsxPage 1 of 1

## 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

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ 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)

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-20_Browns_Ferry_Road_Site_GW_PFBS PFHS PFOS.xls 

### Page 1 of 1Table 3-21Fish Morphometrics and PFOS Concentrations in Fish Filet in Bakers CreekApril 20123M Decatur, AL FacilitySample ID Date Analytical LaboratorySamplingReachLength(inches)Weight(pounds)PFOS Concentration(ng/g)MSF03 4/3/2012 3M Environmental Laboratory Upper 12.00 0.9 70.7MSF04 4/3/2012 3M Environmental Laboratory Upper 14.75 1.7 576MSF05 4/3/2012 3M Environmental Laboratory Upper 17.75 2.9 471MSF05D 4/3/2012 AXYS Laboratory Upper " " 656MSF06 4/3/2012 3M Environmental Laboratory Upper 14.00 1.5 156MSF18 4/4/2012 3M Environmental Laboratory Upper 15.75 2.5 701MSF19 4/4/2012 3M Environmental Laboratory Upper 14.75 1.8 675MSF20 4/4/2012 3M Environmental Laboratory Upper 14.25 1.0 1180MSF21 4/4/2012 3M Environmental Laboratory Upper 17.00 2.8 671MSF22 4/4/2012 3M Environmental Laboratory Upper 11.25 0.8 4660MSF23 4/4/2012 3M Environmental Laboratory Upper 17.50 3.1 52.5MSF02 4/3/2012 3M Environmental Laboratory Middle 14.50 1.8 4240MSF07 4/3/2012 3M Environmental Laboratory Middle 16.00 2.2 2920MSF08 4/3/2012 3M Environmental Laboratory Middle 13.50 1.3 1360MSF09 4/3/2012 3M Environmental Laboratory Middle 13.25 1.2 2020MSF09D (MSF27) 4/3/2012 3M Environmental Laboratory Middle " " 2120MSF10 4/3/2012 3M Environmental Laboratory Middle 14.00 1.7 1840MSF11 4/3/2012 3M Environmental Laboratory Middle 15.375 2.0 2940MSF11D 4/3/2012 AXYS Laboratory Middle " " 3720MSF11D (Duplicate) 4/3/2012 AXYS Laboratory Middle " " 3510MSF12 4/3/2012 3M Environmental Laboratory Middle 15.50 2.1 526MSF13 4/3/2012 3M Environmental Laboratory Middle 18.50 3.3 950MSF14 4/3/2012 3M Environmental Laboratory Middle 17.50 3.6 3370MSF15 4/3/2012 3M Environmental Laboratory Middle 17.50 3.3 754MSF01 4/3/2012 3M Environmental Laboratory Lower 10.75 0.5 4770MSF16 4/4/2012 3M Environmental Laboratory Lower 12.50 1.0 1520MSF17 4/4/2012 3M Environmental Laboratory Lower 13.75 1.2 165MSF17D (MSF28) 4/4/2012 3M Environmental Laboratory Lower " " 180MSF24 4/5/2012 3M Environmental Laboratory Lower 16.00 2.1 437MSF24D 4/5/2012 AXYS Laboratory Lower " " 537MSF25 4/5/2012 3M Environmental Laboratory Lower 16.50 2.1 306MSF26 4/5/2012 3M Environmental Laboratory Lower 15.00 1.7 2090MSF26D (MSF29) 4/5/2012 3M Environmental Laboratory Lower " " 2050Notes:PFOS concentrations are the average of the primary and duplicate analytical results expresssed in ng/g (ppb) on a wet weight basisSample IDs with a "D" suffix are field duplicates obtained from left side filet samplesJ:\3M‐DECAT\2013SulfonatesReport\Final(September2014)\Tables\Table_3‐21_and_3‐22_(new).xlsxPage1of1Table 3-22PFOS Concentrations and Sample Parameters in Surface Water in Bakers CreekApril 20123M Decatur, AL FacilityLower Reach Middle Reach Upper ReachSample Station IDLOC001LOC002LOC003Northing (Decimal degrees)34.64434.63834.637Westing (Decimal degrees)87.03587.02987.021Date04/05/1204/05/1204/05/12Time9:5010:1710:37Temperature (°C)21.6321.7721.5Specific conductance (μS/cm)189187193Dissolved oxygen (mg/L)7.749.758.13pH (S.U.)7.338.137.56Turbidity (NTU)35.223.521.5Average PFOS (ng/mL)0.4500.6910.0237Notes: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 milliliterJ:\3M‐DECAT\2013SulfonatesReport\Final(September2014)\Tables\Table_3‐21_and_3‐22_(new).xlsxPage1of1

### 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

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ 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

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ 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

J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-23_2012_FISH_Tissue.xlsx Page 4 of 4Table 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 (DUP 1 ) DAL-SW-R02L3-DUPA-12111 6 11/16/2012 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 (DUP 1 ) DAL-SW-R05L1-DUPA-12111 9 11/19/2012 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 (DUP 1 ) DAL-SW-R06L2-DUPA-12112 0 11/20/2012 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 (DUP 1 ) DAL-SW-R10L3-DUPA-12111 9 11/19/2012 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 (DUP 1 ) 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 1Table 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 (DUP 1 ) < 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

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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 2Table 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 3Table 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 3Table 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.

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### 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

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### 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

- 1 

# 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 Dece mber 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 sulfon ate 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 Sedim ent 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.J:\ 3M

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- 2 • 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/sed iment 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 concentrat ions 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, th e 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 s oil 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, wh ereas 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 pr evious LOI, Phase 2 and supplemental assessment data, provide the basis for the hydrogeologic modelJ:\ 3M

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- 3 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
transition al 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 pref erred 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 wit hin 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 loca ted 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.J:\ 3M

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## 4

- 4 • Groundwater elev ation 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 Ba kers 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 hi gh 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 Gro undwater
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, excludingJ:\ 3M

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## 4

- 5 extraction wells RW312R and the GRS04 sample (see below), were at or below 8 32 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 de pth (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 Fiel d 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 th ese two wells.J:\ 3M

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## 4

- 6 • 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 o ff

- 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 2 012 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 we ll 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 well s 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 t he 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.J:\ 3M

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## 4

- 7 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 Tabl es 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 N ovember 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 gradi ent 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 resid uum 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.\\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014 

## 4-8 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 dow ngradient 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 Tabl e 3-23 and 3-20 through 3-22 for the Fall 2012 study.

April 2012

 PFOS was detected in every fish specime n collected in the April 2012 sampling event. The median filet tissue PFOS con centrations 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, re spectively. 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 sa mple from Reach 05 (Mouth of Bakers Creek) and 3.02 ppb in a channel catfish sample from Reach 11 (Mouth of Mallard Creek).J:\ 3M

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## 4

- 9 • 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 sample s. 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 fi sh 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 concentrat ions 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 s urface 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
th e 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.J:\ 3M

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## 4

- 10 • 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 transec t, 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 0 3 (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 ACT IVITIES IN SUPPORT O F REMEDIAL DESIGN
Sulfonate samples were voluntarily collected by 3M in conjunction with non

- MO U 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 p roposed, 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 drainage way surface water and, thus, reductions in releases to surface water features.J:\ 3M

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## 4

- 11 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 fr om 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 groundwa ter 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 Janu ary 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.J:\ 3M

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## 4

- 1 2 • 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. Ex cavated 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 f rom 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.J:\ 3M

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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 p rogram.

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 s urface 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 sed iment 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.J:\ 3M

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# SECTION 4

FIGURESField 12 Field 13 Goose Pond 

## BP Property

Bakers Creek Closed LandfillFinley Island Road Field 9 Norfolk Southern Railroad

Field 6

Field 8a Field 3

Field 2 Field 6

Field 7 Field 1

Field 4 Field 8aState Docks Road

Field 10

Field 11

Field 5Nebo 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 Pond 

## BP Property

Bakers Creek Closed LandfillFinley Island Road Field 9 Norfolk Southern Railroad

Field 6

Field 8a Field 3

Field 2 Field 6

Field 7 Field 1

Field 4 Field 8aState Docks Road

Field 10

Field 11

Field 5Nebo 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 1,000 500 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 BoundaryJ:\ 3M

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# SECTION 4

TABLESTable 4-1Site Features and NPDES Remedial Action Agreement Mitigation Areas3M Decatur, AL FacilityFormer Sludge Incorporation Area SoilCapping of FSIA fields with FML and soil. Revegetate perE&S requirements2008 - Ongoing OngoingWEEC Pond Sediment / SoilRemove top 3 feet of sediment. Replace removed sedimentswith clean fill. Line pond with FML. Place sediments underFSIA multilayer cap.2008 - 2009 CompletedFire Training Area SoilRemove soil, backfill/surface restoration. Place excavatedsoils under FSIA multilayer cap.2012 CompletedWWTP Area GroundwaterInstall recovery wells and route groundwater to existinggroundwater treatment plant2012 - 2013Installation complete,system operatingNorth of Closed Landfill Sediment / SoilInstallation of FML, soil cap to isolate soils / sediment fromstormwater runoff and install groundwater extraction wells2013 - 2014 OngoingMarsh west of Closed Landfill SedimentConstruct soil cap and stormwater diversion to isolatestormwater run-off from sediments2013 - 2014 OngoingAvenue A drainageway SedimentRemove sediments from ditch as part of ditch maintenance;place under FSIA multilayer cap2014To BeCompletedNotes:E&S = Erosion and SedimentationFSIA = Former Sludge Incorporation AreaFML = Flexible Membrane LinerWEEC - Wetlands Edge Environmental CenterWWTP = wastewater treatment plantLocationDescriptionStatusMediaTime PeriodJ:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_4-1_Site_Activities.xlsPage 1 of 1\\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014 

## 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 000 0205. Montgomery Coun ty, AL. June27, 2008. EPA (U.S. Environmental Protection Agency). 2004. Memorandum of Understanding between the U.S. Environmental Protection Ag ency and 3M Company and Dyneon LLC for a Perfluorooctanoic Acid (PFO A) Site-Related Environm ental 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. Prep ared by Weston Solutions, Inc. for the 3M Company, July 2009.\\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014 

## 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.\\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014 

## 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 Samp ling 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 Sampli ng 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.R:\FOLDERS.0-9\3M-DECAT\2013 SULFONATES REPORT\FINAL (SEPTEMBER 2014)\SULFONATES_APPENDIXBREAKERS_ALL.DOCX 9/18/2014 

# APPENDIX A

LABORATORY DATA PACKAGESR:\FOLDERS.0-9\3M-DECAT\2013 SULFONATES REPORT\FINAL (SEPTEMBER 2014)\SULFONATES_APPENDIXBREAKERS_ALL.DOCX 9/18/2014 

# APPENDIX A-1

GLP INTERIM REPORT DATA PACKAGESR:\FOLDERS.0-9\3M-DECAT\2013 SULFONATES REPORT\FINAL (SEPTEMBER 2014)\SULFONATES_APPENDIXBREAKERS_ALL.DOCX 9/18/2014 

# APPENDIX A-2

ISO REPORT DATA PACKAGESR:\FOLDERS.0-9\3M-DECAT\2013 SULFONATES REPORT\FINAL (SEPTEMBER 2014)\SULFONATES_APPENDIXBREAKERS_ALL.DOCX 9/18/2014 

# APPENDIX A-3
THIRD-PARTY (AXYS ANALY TICAL) DATA PACKAGESR:\FOLDERS.0-9\3M-DECAT\2013 SULFONATES REPORT\FINAL (SEPTEMBER 2014)\SULFONATES_APPENDIXBREAKERS_ALL.DOCX 9/18/2014 

# APPENDIX B

FISH SAMPLING AND ANALYSIS FO R PFOS IN LARGEMOUTH BASS FROM THE TENNESSEE RIVER IN THE VICINITY OF THE 3M DECATUR FACILITY (WESTON, 2012b)R:\FOLDERS.0-9\3M-DECAT\2013 SULFONATES REPORT\FINAL (SEPTEMBER 2014)\SULFONATES_APPENDIXBREAKERS_ALL.DOCX 9/18/2014 

# APPENDIX C

TENNESSEE RIVER PE RFLUOROCHEMICAL (PFC) ASSESSMENT FISH TISSUE AND SURFACE WATER SAMPLING REPORT OCTOBER – DECEMBER 2012 (WESTON, 2013e)