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3M Company St. Paul, Minnesota Addendum to the Perfluorinated Sulfonates Data Report 3M Decatur, Alabama Facility Site-Related Environmental Monitoring Program September 2014 13P-0512-2 ADDENDUM TO THE PERFLUORINATED SULFONATES DATA REPORT 3M DECATUR, ALABAMA FACILITY SITE-RELATED ENVIRONMENTAL MONITORING PROGRAM September 2014 Prepared for 3M COMPANY St. Paul, Minnesota 55144 Prepared by WESTON SOLUTIONS, INC. West Chester, Pennsylvania 19380 W.O. No. 02181.129.138.0001 TABLE OF CONTENTS Section Page 1. INTRODUCTION.......................................................................................................... 1-1 1.1 BACKGROUND................................................................................................. 1-1 1.2 DESCRIPTION OF HISTORICAL AND PRESENT PRODUCTION OF SULFONATE PRODUCTS................................................................................ 1-3 1.3 SULFONATES SAMPLING PROGRAM.......................................................... 1-4 1.4 ANALYTICAL DATA QUALITY AND DATA REDUCTION PROCESS............................................................................................................ 1-4 1.5 REPORT ORGANIZATION............................................................................... 1-6 2. ENVIRONMENTAL SETTING.................................................................................. 2-1 2.1 SITE LOCATION AND BACKGROUND INFORMATION............................ 2-1 2.2 TOPOGRAPHY AND DRAINAGE................................................................... 2-2 2.3 GEOLOGY.......................................................................................................... 2-3 2.4 HYDROGEOLOGY............................................................................................ 2-4 2.5 FORMER SLUDGE INCORPORATION AREA............................................... 2-6 3. SUMMARY OF FIELD ACTIVITIES........................................................................ 3-1 3.1 SOIL AND SEDIMENT...................................................................................... 3-1 3.1.1 3.1.2 3.1.3 Phase 3 On-Site Soil Sampling in the FSIA Area................................. 3-1 Phase 3 Off-Site Soil and Sediment Sampling at the Wetlands Edge Environmental Center Area......................................................... 3-1 Phase 3 Off-Site Soil Sampling at Monitoring Well Locations............ 3-2 3.2 GROUNDWATER.............................................................................................. 3-4 3.2.1 3.2.2 3.2.3 3.2.4 On-Site Groundwater Monitoring......................................................... 3-4 Phase 3 Off-Site Groundwater Summary............................................. 3-6 Regional Groundwater Sampling and Analysis and Conclusion of the Phase 3 Off-Site Groundwater Monitoring Program...................... 3-8 Phase 3 Assessment of Off-Site Waste Disposal Facilities.................. 3-9 3.3 FISH SAMPLING............................................................................................. 3-14 3.4 SUPPLEMENTAL SURFACE WATER SAMPLING..................................... 3-15 3.5 CHARACTERIZATION ACTIVITIES IN SUPPORT OF ON-SITE REMEDIAL DESIGN AND OFF-SITE ENVIRONMENTAL ASSESSMENT.................................................................................................. 3-16 3.5.1 3.5.2 3.5.3 Avenue A Drainageway...................................................................... 3-16 On-Site Soil Sampling Adjacent to FSIA Field 6 ............................... 3-17 Browns Ferry Road Site...................................................................... 3-18 4. FINDINGS...................................................................................................................... 4-1 4.1 SOIL AND SEDIMENT....................................................................................... 4-1 ii J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 TABLE OF CONTENTS (Continued) Section Page 4.1.1 4.1.2 4.1.3 On-Site Soil........................................................................................... 4-1 MOU Phase 3 Off-Site Soil and Sediment at the WEEC......................4-1 Off-Site Soil.......................................................................................... 4-2 4.2 GROUNDWATER.............................................................................................. 4-2 4.2.1 4.2.2 4.2.3 4.2.4 Hydrogeology....................................................................................... 4-2 On-Site Groundwater............................................................................ 4-4 Off-Site Groundwater........................................................................... 4-6 Phase 3 Assessment of Off-Site RegionalWaste Disposal Facilities................................................................................................ 4-7 4.3 FISH SAMPLING...............................................................................................4-8 4.4 SURFACE WATER............................................................................................ 4-9 4.5 CHARACTERIZATION ACTIVITIES IN SUPPORT OF REMEDIAL DESIGN............................................................................................................. 4-10 4.5.1 4.5.2 4.5.3 Avenue A Drainageway......................................................................4-11 On-Site Soil Sampling Adjacent to FSIA Field 6 ............................... 4-12 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) iii J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 i i w u \ i 11 LIST OF FIGURES Title Figure 2-1 Site Location Map Figure 2-2 Site Features Figure 2-3 Former Sludge Incorporation Area Figure 3-1 PFBS, PFHS and PFOS Concentrations in On-Site Former Sludge Incorporation Area Soils (March 2010) Figure 3-2 Wetlands Edge Environmental Center Average Sediment and Soil PFBS, PFHS and PFOS Concentrations (June 2010) Figure 3-3 Phase 3 Off-Site Monitoring Well Soil Boring Average PFBS, PFHS and PFOS Concentrations (September - October 2010 - August 2011) Figure 3-4 On-Site Chemical Plant and Closed Landfill Area Groundwater PFBS, PFHS and PFOS Concentrations (October 2013) Figure 3-5 On-Site Former Sludge Incorporation Area Groundwater PFBS, PFHS and PFOS Concentrations (March 2014) Figure 3-6 Groundwater Average PFBS, PFHS and PFOS Concentrations On-Site Former Sludge Incorporation Area Pump Test (June 2012 and December 2012) Figure 3-7 Wastewater Treatment Plant Area Groundwater Average PFBS, PFHS and PFOS Concentrations (April 2012) Figure 3-8 Groundwater Average PFBS, PFHS and PFOS Concentrations Wastewater Treatment Plant Area Extraction Wells (June 2012 - June 2014) Figure 3-9 Off-Site Phase 2 and Phase 3 Monitoring Wells Groundwater Average PFBS, PFHS and PFOS Concentrations (March - April 2012) Figure 3-10 Morgan County Landfill Groundwater Monitoring Wells Average PFBS, PFHS and PFOS Concentrations (November 2010 and April 2012) Figure 3-11 Groundwater Average PFBS, PFHS and PFOS Concentrations, Chemical Plant and Closed Landfill Area (April 2012) Figure 3-12 Former Sludge Incorporation Area Groundwater Average PFBS, PFHS and PFOS Concentrations (March-April 2012) Figure 3-13 Residuum Groundwater Elevation Contour Map iv \\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014 LIST OF FIGURES (Continued) Title Figure 3-14 Bedrock Groundwater Elevation Contour Map Figure 3-15 Regional Disposal Facility Map Figure 3-16 BFI Morris Farms Landfill Groundwater Average PFBS, PFHS and PFOS Concentrations (March 2011) Figure 3-17 Browns Ferry Road Site Groundwater Average PFBS, PFHS and PFOS Concentrations (August 2013) Figure 3-18 Fish Filet Tissue Average PFOS Concentrations, Bakers Creek and Tennessee River (April 2012) Figure 3-19 Surface Water Average PFOS Concentrations, Bakers Creek and Tennessee River (April 2012) Figure 3-20 Fish Filet Tissue Average PFBS Concentrations, Tennessee River (October November 2012) Figure 3-21 Fish Filet Tissue Average PFHS Concentrations, Tennessee River (October November 2012) Figure 3-22 Fish Filet Tissue Average PFOS Concentrations, Tennessee River (October November 2012) Figure 3-23 Surface Water - Fish Reaches Average PFBS, PFHS and PFOS Concentrations, Tennessee River (November 2012) Figure 3-24 Surface Water - Transects Average PFBS, PFHS and PFOS Concentrations, Tennessee River (December 2012) Figure 3-25 Avenue A Surface Water and Groundwater Average PFBS, PFHS and PFOS Concentrations (June - July 2010) Figure 3-26 Avenue A Soil and Sediment Average PFBS, PFHS and PFOS Concentrations (June - July 2010) Figure 3-27 Additional Avenue A Groundwater Average PFBS, PFHS and PFOS Concentrations (January 2011) Figure 3-28 Avenue A Soil and Sediment Average PFBS, PFHS and PFOS Concentrations (January 2011) v J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 LIST OF FIGURES (Continued) Title Figure 3-29 Area Adjacent to Field 6 Soil PFBS, PFHS and PFOS Concentrations (December 2012) Figure 3-30 Browns Ferry Road Site Surface Water Average PFBS, PFHS and PFOS Concentrations (February 2012 - August 2013) Figure 3-31 Browns Ferry Road Site Sediment PFBS, PFHS and PFOS Concentrations (February 2012) Figure 4-1 Site Features and NPDES Remedial Action Agreement Mitigation Areas vi \\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014 LIST OF TABLES Title Table 1-1 Summary of Sulfonate Sampling Program (October 2004 to April 2008) Table 1-2 Summary of the Sulfonates Sampling Program (March 2010 - June 2014) Table 3-1 On-Site FSIA PFBS, PFHS and PFOS Surface Soil Concentrations (March 2010) Table 3-2 PFBS, PFHS and PFOS Results for Wetlands Edge Environmental Center Soils and Sediments (June 2010) Table 3-3 PFBS, PFHS and PFOS Results for Off-Site Monitoring Wells Soil Boring Samples (October 2010 - August 2011) Table 3-4 On-Site Groundwater Monitoring Wells Table 3-5 On-Site Chemical Plant and Closed Landfill Wells PFBS Analytical Results (2010 - 2013) Table 3-6 On-Site Chemical Plant and Closed Landfill Wells PFHS Analytical Results (2010 - 2013) Table 3-7 On-Site Chemical Plant and Closed Landfill Wells PFOS Analytical Results (2010 - 2013) Table 3-8 On-Site FSIA Monitoring Wells PFBS Analytical Results (2010 - 2014) Table 3-9 On-Site FSIA Monitoring Wells PFHS Analytical Results (2010 - 2014) Table 3-10 On-Site FSIA Monitoring Wells PFOS Analytical Results (2010 - 2014) Table 3-11 On-Site Former Sludge Incorporation Area Pump Test Groundwater PFBS, PFHS and PFOS Concentrations (June and December 2012) Table 3-12 On-Site Wastewater Treatment Plant Groundwater Average PFBS, PFHS and PFOS Concentrations (April 2012) Table 3-13 On-Site Wastewater Treatment Plant Extraction Wells Groundwater PFBS, PFHS and PFOS Concentrations (2012-2014) Table 3-14 Off-Site Monitoring Well Construction Data Table 3-15 Phase 2 and Phase 3 Off-Site Groundwater PFBS Concentrations (October 2010 April 2012) vii \\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014 LIST OF TABLES (Continued) Title Table 3-16 Phase 2 and Phase 3 Off-Site Groundwater PFHS Concentrations (October 2010 April 2012) Table 3-17 Phase 2 and Phase 3 Off-Site Groundwater PFOS Concentrations (October 2010 April 2012) Table 3-18 PFBS, PFHS and PFOS Concentrations in Morgan County Landfill Monitoring Wells (November 2010 and April 2012) Table 3-19 BFI Morris Farm Landfill Groundwater PFBS, PFHS and PFOS Concentrations (March 2011) Table 3-20 Browns Ferry Road Site Groundwater PFBS, PFHS and PFOS Concentrations (April 2012, October 2012 and August 2013) Table 3-21 Fish Morphometrics and PFOS Concentrations in Fish Filet in Bakers Creek (April 2012) Table 3-22 PFOS Concentrations and Sample Parameters in Surface Water in Bakers Creek (April 2012) Table 3-23 PFBS, PFHS and PFOS Concentrations in Fish Filet in the Tennessee River, (October-November 2012) Table 3-24 PFBS, PFHS and PFOS Concentrations in Surface Water in the Tennessee River Fish Reach Locations (November 2012) Table 3-25 PFBS, PFHS and PFOS Concentrations in Surface Water in the Tennessee River Surface Water Transects (December 2012) Table 3-26 PFBS, PFHS and PFOS Concentrations for Avenue A Groundwater, Surface Water, Soil and Sediment Samples (June - July 2010) Table 3-27 PFBS, PFHS and PFOS Concentrations for Avenue A Groundwater Samples (January 2011) Table 3-28 On-Site Avenue A Soil and Sediment PFBS, PFHS and PFOS Concentrations (January 2011) Table 3-29 On-Site Area Adjacent to Field 6 Soil Boring PFBS, PFHS and PFOS Concentrations (December 2012) Viii J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 LIST OF TABLES (Continued) Title Table 3-30 Browns Ferry Road Site Surface Water PFBS, PFHS and PFOS Concentrations (February 2012, October 2012 and August 2013) Table 3-31 Browns Ferry Road Site Sediment PFBS, PFHS and PFOS Concentrations (February 2012) Table 4-1 Site Features and NPDES Remedial Action Agreement Mitigation Areas ix J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 LIST OF ACRONYMS 3M ADAR ADEM APSDR BFRS 3M Company, including its former subsidiary, D yneon LLC Addendum to the Data A ssessm ent Report Alabama Department o f Environmental M anagem ent Addendum to the Perfluorinated Sulfonates Data Report Browns Ferry Road Site bgs b elow ground surface BP BP Chemical Company DAR Dyneon Data Assessm ent Report Dyneon, LLC EPA FDNR FML U .S. Environmental Protection A gency Future Data N eeds A ssessm ent Report flexible membrane liner FMS FSIA field matrix spike Former Sludge Incorporation Area ft bgs feet below ground surface ft msl FTA feet above mean sea level Fire Training Area GAC GLP GWTP IS ISO ITP LMS LOI LOQ MOU ND ng/g (ppb) ng/L (ppt) ng/mL (ppb) NPDES NR granular activated carbon Good Laboratory Practices groundwater treatment plant internal standard International Organization for Standardization Independent Third Party laboratory matrix spike Letter o f Intent lim it o f quantitation M emorandum o f Understanding not detected nanograms per gram (parts per billion) nanograms per liter (parts per trillion) nanograms per m illiliter (parts per billion) National Pollutant Discharge Elim ination System not reported PCG Peer Consultation Group x J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 PFBS PFC PFHS PFOA PFOS PMN PSDR QA Q A /Q C QC RCRA RM SLHEA SRS TSCA USACE U .S . VOC WEEC WESTON WWTP LIST OF ACRONYMS (Continued) perfluorobutane sulfonate p erflu orochem ical perfluorohexane sulfonate perfluorooctanoic acid perfluorooctane sulfonate Premanufacturing N otice Perfluorinated Sulfonates Data Report quality assurance quality assurance/quality control quality control Resource Conservation and R ecovery Act river mile screening level human exposure assessm ent surrogate recovery standard Toxic Substances Control Act U .S. Army Corps o f Engineers United States o f America volatile organic com pound W etlands Edge Environm ental Center W eston Solutions, Inc. wastewater treatment plant xi J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 1. INTRODUCTION 1.1 BACKGROUND Effective October 25, 2004, the 3M Company (3M), its wholly-owned subsidiary at the time, Dyneon LLC (Dyneon), and the United States Environmental Protection Agency (EPA) entered into a Memorandum of Understanding (MOU) that contained the commitment of 3M and Dyneon (hereafter together referred to as 3M), to conduct a Perfluorooctanoic Acid (PFOA) SiteRelated Environmental Monitoring and Assessment Program (Program) for the 3M Decatur Alabama facility (EPA, 2004). In the U.S., the products and business of Dyneon LLC were integrated into 3M effective January 1, 2011. The goal of the PFOA Site-Related Environmental Assessment Program was to characterize sources and the presence of PFOA in various environmental media, on- and off-site, associated with the manufacturing operations at the 3M Decatur facility. Additionally, and separate from the MOU activity, 3M voluntarily carried out a concurrent sampling and analysis program for three other perfluorochemical (PFC) substances. These compounds were: Perfluorobutane sulfonate (PFBS). Perfluorohexane sulfonate (PFHS). Perfluorooctane sulfonate (PFOS). In accordance with the requirements of the MOU, Work Plans were developed for sampling environmental media for PFOA at the 3M Decatur, Alabama facility. The perfluorinated substances PFBS, PFHS and PFOS (hereinafter referred to as sulfonate or sulfonates) samples were collected in the same manner specified in the PFOA work plans. From October 2004 to April 2008, field activities were conducted in accordance with the MOU PFOA Phase 2 Work Plan (WESTON, 2004), and the sulfonate samples were voluntarily collected by 3M. More than 1,000 environmental samples were collected for sulfonate analysis, and the results were submitted to the EPA in the September 2008 Perfluorinated Sulfonates Data Report for the 3M Decatur, Alabama Facility Site-Related Environmental Monitoring 1-1 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 Program (PSDR) (WESTON, 2008a). A summary of the samples collected for the PSDR is presented in Table 1-1. The data presented in the PSDR generally corresponded to the PFOA data presented in the PFOA Data Assessment Report for the 3M Decatur, Alabama Facility Site-Related Environmental Monitoring Program (DAR) (WESTON, 2008b). However, the PSDR included additional data from Phase 2 that was received after the DAR was submitted to the EPA (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 o f the Peer Consultation for a PFOA Site-Related Environmental Assessment Program for the 3MProperty 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 Reportfor the 3M Decatur, Alabama Facility (ADAR) (WESTON, 2013a) that was submitted to the EPA in November 2013. In addition, more details on sample collection activities are provided in a series of quarterly status reports prepared throughout the Phase 3 program (WESTON, 2010a-d; 2011a-d; 2012a-d; and 2013b-d). For brevity, these quarterly status reports are referred to by the end date of each quarter; e.g., the July 1, 2013 to September 30, 2013 Quarterly Status Report is referred to as the September 30, 2013 Quarterly Status Report. Consistent with previous activities, 3M voluntarily collected sulfonate samples during the MOU Phase 3 activities. In addition, sulfonates were included as part of additional characterization activities performed for a PFC remediation program to minimize the potential 1-2 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 human exposure and migration pathways. This work was conducted with the involvement and approval of the Alabama Department of Environmental Management (ADEM). Remediation activities performed at the 3M Decatur facility are described in Subsection 4.6. This Addendum to the Perfluorinated Sulfonates Data Report (APSDR) includes a summary of the characterization activities and the results of sample analysis. More than 900 sulfonate samples were collected from March 2010 to June 2014. A summary of the samples collected for the APSDR is presented in Table 1-2. The results from these samples are summarized in Section 3 and serve as a basis for the findings presented in this report. The data and information generated were collected using scientific practices, protocols and procedures that have been designed to ensure data of highest quality, objectivity, utility and integrity. The data were used to assess the presence of sulfonates in environmental media in and around the 3M Decatur facility. This APSDR is a robust summary of all the data and information generated. 1.2 DESCRIPTION OF HISTORICAL AND PRESENT PRODUCTION OF SULFONATE PRODUCTS The manufacturing of PFOS-related substances began in the early 1960s at the 3M Decatur, Alabama facility. Production of these substances continued until 2001 following the voluntary phase-out announcement by 3M in May 2000. Following the production phase-out of PFOSrelated and PFHS-related products, 3M began production of PFBS-related substances after obtaining approval from EPA pursuant to the Premanufacturing Notice (PMN) requirements under the Toxic Substances Control Act (TSCA). Because production of these three types of perfluorochemicals either occurred historically (PFOS-related and PFHS-related) or is occurring currently (PFBS-related), the ultimate degradation end products of these substances were the specific compounds analyzed as part of this assessment program. Thus, the three compounds analyzed in this voluntary sulfonates characterization program were PFOS, PFHS and PFBS. 1-3 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 1.3 SULFONATES SAMPLING PROGRAM The sulfonates sampling program was composed of the collection of data in various media and locations to characterize the presence of sulfonates both on-site and off-site. The sulfonate samples were voluntarily collected by 3M during field work under the MOU, supplemental work activities and additional studies with the input and involvement of ADEM. Section 3, which is organized according to environmental media, includes a description of the characterization tasks and sampling activities conducted for the sulfonates sampling program. The sampling activities were determined based upon the MOU requirements for the PFOA on-site and off-site characterization program and the remedial design data needed for the voluntary site remediation activities. 1.4 ANALYTICAL DATA QUALITY AND DATA REDUCTION PROCESS Analyses of sulfonate samples (i.e., PFBS, PFHS and PFOS) were performed by the 3M Environmental Laboratory, St. Paul, Minnesota, unless otherwise noted. With the exception of the split sample analysis performed by AXYS Analytical laboratories for the fish study (see Subsection 3.3) all the analytical data presented herein was provided by the 3M Environmental Laboratory following the Good Laboratory Practices (GLP) Protocol 10-01-02. The GLP protocol and the specified analytical methods contain rigorous quality assurance/quality control (QA/QC) provisions, including in-phase audits, full documentation, matrix spikes for every sample collected and analyzed, and thorough reviews by the laboratory's Quality Assurance Unit. WESTON also performed independent quality assurance (QA) reviews during the course of the work. The analytical methods reflect the significant developmental effort that had been applied to refine earlier methods to obtain quantitative analytical data for PFOA at parts per trillion (nanograms per liter [ng/L]; parts per trillion [ppt]) limits of quantitation (LOQs). In accordance with the requirements of GLP Protocol 10-01-02, the target LOQ for analyses of aqueous samples (i.e., groundwater, surface water and porewater) was 25 ng/L (0.025 nanograms per milliliter [ng/mL]; parts per billion [ppb]). For analyses of soil and sediment samples, the target LOQ was 200 ng/kg (0.200 nanograms per gram [ng/g]; ppb). In most environmental studies, duplicate analyses are generally performed at a frequency of one duplicate or replicate per 10 or 1-4 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 20 samples (5 to 10%). To maximize the robustness of the characterization data, all Phase 3 sample analyses included either a laboratory replicate sample analysis, a field duplicate sample analysis, or both. By accounting for media and analytical variability, the availability of multiple results for each sampling location provides more reliable estimates of PFC concentrations. Samples collected for sulfonate analyses under the GLP 10-01-02 Protocol were aggregated into subsets by media type and location to provide data in a timely fashion for informing later phases of on-site and off-site data collection. The resulting subsets of analytical results were provided in a series of 35 Interim Reports. In addition to the analysis of samples under the GLP protocols, some samples were analyzed by the same analytical methods under the 3M Environmental Laboratory International Organization for Standardization (ISO) certification. The QA/QC provisions associated with analyses under ISO are extensive and produce data of comparable quality to the GLP analyses. A variety of quality control (QC) samples were analyzed to provide data for assessing analytical accuracy and to demonstrate that the method was under control. These included field matrix spike (FMS) and/or laboratory matrix spike (LMS) samples, stable isotope-labeled internal standards (ISs) and surrogate recovery standards (SRS). Complete details on the analytical process for each sample group were documented in their respective Interim Reports and associated raw data packages and submitted with the quarterly status reports. In instances where the QC data on matrix spike recoveries associated with a sample result were outside the 70 to 130% target range of acceptance for an assessed accuracy of 30%, results with matrix spike recoveries 50 to 150% were reported with an expanded assessment of uncertainty based on method performance. For samples with matrix spike recoveries below 50% or above 150%, the data are not reported (NR). The NR designation does not connote either high or low sample concentrations but rather reflects only that analytical conditions did not meet the criteria for FMS recoveries (aqueous samples) or LMS (solid samples) that would allow reporting of quantitative data with an assessed accuracy of 50%. Other data reported with non-numerical values include the results that are assigned "not detected" (ND) because the analyte was not detected above the LOQ. 1-5 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 For all environmental media samples, primary and field duplicate samples were analyzed. The primary and duplicate results were reduced to a single value in order to simplify reporting. The data reduction process for this APSDR consisted of calculating the average concentration (arithmetic mean) for the sets composed of numeric values. In instances with mixed numeric values and non-numeric values (ND; less than the LOQ), the numeric values were carried through to represent the media concentrations. In these instances, the data reduction convention described above is conservative, consistent with past reporting of PFC data by 3M, and results in overestimation of actual concentrations. 1.5 REPORT ORGANIZATION This APSDR is organized into the following sections: Section 1 - Introduction. This section contains background information on PFC assessment programs for the 3M Decatur Site and a discussion on sulfonates. Section 2 - Environmental Setting. This section contains a brief description of the site location and background information, topography and drainage, geology, hydrogeology, as well as an overview of the background and setting of the former sludge incorporation area (FSIA). Section 3 - Summary of Field Activities. This section contains a description of the activities that were conducted for the sulfonate program, including the locations, types and numbers of samples collected, rationale for sample collection, and methods of collection. Section 4 - Findings. This section contains a summary of key data findings of the sulfonates program. Section 5 - References. Tables and figures are provided at the end of each section for ease of review. 1-6 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 SECTION 1 TABLES J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Reportdocx 9/18/2014 Table 1-1 Summary of the Sulfonate Sampling Program October 2004 - April 2008 3M Decatur, AL Facility O n-Site M edia L ocation P rim a ry Sam ples C ollected (T otal) G roundw ater s e m w <2) FSIA M W Near SEM W Soil F S I A S o il(3) V egetation f s i a (3) Sm all M am m als f s i a (4) Surface W ater Avenue A G oose Pond Sedim ent Avenue A G oose Pond Sanitary W astew ater 3M W W TP T O T A L "' O N -SITE SAM PLES: 32 23 41 325 31 30 2 3 6 2 1 496 FSIA = Former Sludge Incorporation Area MW = Monitoring Wells SEMW = Selected Existing Monitoring Wells WTP = Water Treatment Plant WWTP = Wastewater Treatment Plant Field D uplicate S am ples C ollected ( T o t a l) " 1' 32 23 0 16 0 0 2 3 0 0 1 77 O ff-Site M edia L ocation G roundw ater O ff-S ite 1234(5) R esidential W ells S o il O ff-S ite M W (6) Surface W ater T e n n e s s e e R iv e r/B a k e rs C re e k (7) O ff-Site M arsh Sedim ents Porew ater F is h - F ile t(8) Fish - W hole B o d y (8) Clam s T ennessee R iver/B akers C reek O ff-Site M arsh & D rainagew ay T ennessee R iver T ennessee R iver/B akers C reek T ennessee R iver/B akers C reek T ennessee R iver/B akers C reek D ecatur U tilities W TP Public W ater (F inished W ater) R a w W a te r(10)1 W astew ater S lu d g e Leachate D e c a tu r U tilitie s S u p p ly (9) W est M organ/E ast Law rence W TP M uscle Shoals W TP Florence W TP T ennessee V alley A uthority W TP Sheffield W TP D ecatur U tilities W TP W est M organ/E ast Law rence W TP D ry C reek W W TP - Influent D ry Creek W W TP - Effluent D ry Creek W W TP M organ C ounty Landfill T O T A L (1) O F F - S I T E S A M P L E S : P rim a ry Sam ples C ollected (T otal) 31 2 30 73 3 30 42 12 115 117 12 5 4 4 3 3 3 3 1 1 1 2 2 2 501 F ield D uplicate S am ples C ollected ( T o t a l ) (11) 31 2 6 73 3 0 4 12 2 0 0 5 4 4 3 3 3 3 1 1 1 2 1 2 166 (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 o f 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. :\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_1_1_PSDR_Samplf Page 1 of 1 Table 1-2 Summary of the Sulfonates Sampling Program March 2010 - June 2014 3M Decatur, AL Facility Media Groundwater Soil On-Site Location Primary Samples Collected (Total) Field Duplicate Samples Collected (Total/11 Facility W ells(1) FSIA MW WWTP W ells Avenue A f s ia (4) 144 251 68 13 32 144 251 68 13 3 Avenue A 126 15 Surface Water Avenue A S e d im e n t Avenue A TOTAL ON-SITE SAMPLES: 12 52 698 12 4 510 Media Groundwater Soil Surface Water Off-Site Location Primary Samples Collected Total Off-Site<5) Off-Site Waste Disposal Locations<6) Off-Site MWs<7) Off-Site soil (WEEC) Tennessee River/Bakers Creek<8) Off-Site Waste Disposal Locations<9) 58 76 18 10 138 13 Field Duplicate Samples Collected (Total)111' 58 76 1 1 138 13 S e d im e n t Off-Site Marsh <WEEC) Browns Ferry Road Site Fish - Filet(10) Tennessee River<8) TOTAL OFF-SITE SAMPLES: 15 5 179 512 2 0 18 307 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 landfillextraction 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, 138R/S/L,140R, 141R,142R, 143R,144-PZE1 [1], 144-PZE-2 [1], 144S [4],145S and CW26C/L. (3) Includes WWTP extraction wells WW8R, WW9R, WW10R and WW11R and TW1R to TW6R. (4) Includes on-site soil sampling in Field 5, Field 11, Field 8C and the area adjacent to Field 6. (5) Includes off-site monitoring well clusters 601S, 602S/L, 603S/L, 604R/S/L, 605R/L, 607R/S/L, 609R/L, 610S/L, 611R/L and BP Wells MW-121 and MW-47. (6) Samples collected at Morgan County Landfill, Browns Ferry Road Site and the former BFI Morris Farms Landfill. (7) Samples collected during the installation of off-site well clusters (607, 609, 610 and 611) and in the vicinity of BP Wells MW-47 and MW-121. (8) Includes samples collected from Wheeler and Wilson Reservoir. (9) Samples collected in the vicinity of the Browns Ferry Road Site. (10) Two species of fish. (11) Duplicate samples were collected at all aqueous sample locations. (12) Does not include third party split samples. J:\FOLDERS.0-9\3M-DECAT\2013 Su nal (September2014)\Tables\Table_1_2_APSDR_Samples.xls Page 1 of 1 2. ENVIRONMENTAL SETTING 2.1 SITE LOCATION AND BACKGROUND INFORMATION As shown in Figure 2-1, the 3M Decatur, Alabama facility is located approximately 2 miles northwest of the City of Decatur along the south bank of the Wheeler Reservoir (Tennessee River) and west of the confluence of Bakers Creek. The property is bounded on the west, south and east primarily by Finley Island Road, State Highway 72, and State Docks Road, respectively. The Decatur area has a significant industrial base. Other facilities in proximity to the 3M Decatur facility include: Ascend Performance Materials plant (formerly Solutia, Inc.) to the east (and east of Bakers Creek). BP Chemical Company (BP) facility to the west. Port of the City of Decatur - east of the facility and on the west side of Bakers Creek. Daikin manufacturing facility - east of the facility and on the west side of State Docks Road and on the west side of Bakers Creek. Toray Fluorofibers America, Incorporated - east of the facility and east of Bakers Creek. Decatur Utilities - east of the facility and east of Bakers Creek. AlphaPet Facility - west of the facility and on the west side of Finley Island Road. Mallard-Fox Creek Industrial Park - northwest of the facility along the Tennessee River. 3M began operations at the Decatur, Alabama facility in 1961 with the construction of the chemical manufacturing plant (Chemical Plant). In 1962, the facility was expanded to include a film manufacturing plant (Film Plant). As the facility continued to develop, the Dyneon facility, which makes advanced fluoropolymer materials, was established on 3M's manufacturing site in the southern portion of the Chemical Plant area (Figure 2-2). Process wastewater from the 3M plant operations has been treated in the on-site wastewater treatment plant (WWTP). The treated water has been discharged to the Tennessee River under a 2-1 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 National Pollutant Discharge Elimination System (NPDES) permit issued by ADEM. From 1978 to 1998, sludge from the on-site WWTP was incorporated by means of subsurface slurry injection to fields occupying the southern portion of the 3M property. The sludge was generated from the treatment of the manufacturing facility wastewater. The area was designated as a sludge incorporation area, and these activities were conducted under an NPDES permit. The FSIA is shown in Figure 2-2 and discussed further in Subsection 2.5. 2.2 TOPOGRAPHY AND DRAINAGE An understanding of site topography and drainage patterns is integral to the identification and characterization of potential surface transport pathways. The shape and slope of the land surface directs overland flow of stormwater and sediment during a precipitation event. Additionally, surface features also provide indirect information related to subsurface conditions, such as groundwater flow patterns. Groundwater flow in shallow groundwater zones (and to some extent in deeper groundwater zones) generally tends to mimic surface topographic features, such that groundwater may be predicted to flow from elevation highs to elevation lows. Because of the prevalence of limestone as bedrock in the area, localized dissolution of the rock may result in depressed physiographic features indicative of potential collapse of the bedrock and possible increased groundwater flow. Thus, the following description of the 3M Decatur site topography and drainage systems is provided as a means to further understand the surface and subsurface potential migration pathways for PFCs, which served as a basis for the characterization activities performed at the site. The 3M Decatur facility is located in the Highland Rim section of the Interior Low Plateau's physiographic province. This province is characterized by gently rolling hills, broad low drainage divides and gentle stream gradients. Topographic elevations for the 3M site range from approximately 635 feet above mean sea level (ft msl) in the west-central portion of the site to approximately 550 ft msl along the Tennessee River. Surface water discharges from the property by means of modified natural and man-made ditches. Stormwater runoff from non-process areas in the northern half of the property are directed to small drainage conveyance features that drain directly into the Tennessee River or a primary stormwater drainage (the Avenue A drainageway) on the southern side of the manufacturing 2-2 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 areas that direct flow toward Bakers Creek. Surface runoff in the plant production areas is conveyed to the on-site WWTP for treatment prior to discharge through the site's NPDESpermitted outfall. Stormwater runoff from the central and southern portions of the property is directed via natural and man-made contouring to the east, south and west, ultimately discharging to the Tennessee River via Bakers Creek. Flow to the west is directed to an un-named drainage feature originating immediately west of the 3M property and extending south-southeast back toward the 3M property, crossing the southwest corner of the 3M property along Field 14 and continuing under U.S. Highway 20 and east to Bakers Creek immediately south of U.S. Highway 20. The western portion of this tributary occurs within the Wetlands Edge Environmental Center (WEEC) and is represented by a poorly defined drainage connecting broad areas of wetlands, marsh and wooded swamp. 3M has investigated this drainage course as part of the MOU activities. Upon entering Bakers Creek, flow continues northward, discharging into the Tennessee River immediately east of the 3M Decatur facility (Figure 2-2). The Tennessee River is impounded downstream of the plant by the Wheeler Dam, forming the Wheeler Reservoir. The dam and water levels are managed by the U.S. Army Corps of Engineers (USACE). Flow within Wheeler Reservoir is to the west. The reservoir has a mean summer pool elevation of 556 ft msl and a 100-year flood zone elevation of 568 ft msl. During winter months, the pool level in the reservoir is lowered by the USACE by approximately 5 to 10 feet to help manage the increased rainfall during this period. Although eastern portions of the site lie within the 100-year flood zone, the industrialized portions of the site are entirely above the 100-year flood zone. 2.3 GEOLOGY Knowledge of site geology is integral to understanding the potential transport pathways in the subsurface. In general, the vertical geologic profile for soil and bedrock associated with the 3M Decatur site may be characterized as three somewhat distinct zones: the residuum, the epikarst, and bedrock. The hydrostratigraphic zones are described as follows. 2-3 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014  Residuum - The residuum represents the zone of unconsolidated soil. Residuum at the 3M Decatur site may be described as silty sand to clayey sand alluvial sediments with varying percentages of rounded to sub-rounded chert and sandstone gravel of alluvial origin (associated with the Tennessee River system) that overlay saprolite from the underlying limestone bedrock. Saprolite refers to soil derived from the complete weathering of a rock unit. In this case, the saprolite is characterized by sandy silt to clayey silt with weathered to fresh chert and limestone fragments. The saprolite zones vary considerably in thickness depending on the local potential for bedrock weathering, and are often reflected as a transitional zone from completely weathered soil material to an intermixed zone of soil and residual host rock. Residuum at the 3M Decatur facility typically ranges in thickness from 10 to 50 feet. Epikarst - The transition from completely weathered rock (saprolite) to fresh bedrock is referred to as the epikarst. More specifically, the epikarst refers to the contact between fresh bedrock and overlying unconsolidated soil. The epikarst thickness at the 3M Decatur facility is highly variable and ranges from a few feet to greater than 50 feet. Bedrock - Bedrock refers to the geologic units underlying the unconsolidated (residuum) zone. Bedrock underlying the 3M Decatur facility is known as the Tuscumbia limestone. This unit may be generally described as interbedded gray fine-grained micrite (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, represented primarily by bedding-controlled fractures, decrease in size and frequency with depth. In most areas, these fractures are less than 10 millimeters in thickness. With increased depth, these fractures are often observed filled with calcite further restricting the potential for groundwater flow. Conversely, fractures observed near the current bedrock surface may be highly weathered or expanded via dissolution, resulting in highly permeable flow conduits. A detailed discussion of these geologic features is provided in the 2008 PSDR. 2.4 HYDROGEOLOGY Geologic characteristics described in the previous section influence the flow of subsurface groundwater and constituents that are dissolved or suspended in it. The primary water-bearing zones (in order from shallow to deep) that are evident at, and adjacent to, the 3M Decatur facility include the following: 2-4 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014  Residuum - The residuum shallow water-bearing zone (water table) may be defined as an unconfined aquifer found within the unconsolidated soil at the site. Boring data suggest that residuum groundwater is largely unrestricted within the residuum zone although perching may occur locally at the contact between the upper sequence of alluvial sediments and the underlying saprolite due to a change in composition and grain size. In general, groundwater flow within the residuum zone closely mimics surface topography, allowing for the prediction of general groundwater flow directions based on physiographic features. Monitoring wells screened into this unit are designated with an "R" suffix (e.g., 137R). Epikarst - The transitional weathering attributed to the epikarst zone is most commonly reflected by an increase in chert and residual limestone clasts. The increase in gravel- and boulder-sized clasts is also reflected by a marked increase in groundwater flow (permeability). The distinction of this zone from the overlying residuum zone is subjective due to its transitional nature; however, the change in permeability observed between the epikarst and underlying bedrock is usually abrupt. Groundwater associated with the deeper mature epikarst zones may be regarded as 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 groundwater flow. Monitoring wells screened into this unit are designated with an "S" suffix (e.g., 137S). Bedrock - The bedrock water-bearing zone is restricted to fractures within the Tuscumbia Limestone, and may be described as largely confined to semi-confined in nature. Fractures observed in shallow bedrock are usually larger and may be expanded by dissolution, resulting in the formation of open conduits to voids able to transport large volumes of water in a short amount of time. With increased depth, these fractures rapidly decrease in magnitude and may become filled with calcite or iron precipitation until the flow is negligible. As a result, it is generally accepted that most groundwater movement associated with the bedrock occurs in the shallower depths. Monitoring wells screened into this unit are designated with an "L" suffix (e.g., 137L). In areas of advanced epikarst development where the bedrock surface may be irregular with extreme vertical relief, it is possible for bedding-controlled fractures within competent bedrock to be exposed to epikarst zones allowing for increased communication between the two zones. Water-bearing fractures occurring below the potential depth of weathering are presumed to have limited access to overlying water zones due to their confined nature and so remain largely isolated. 2-5 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 Because of the increased confinement of the bedrock groundwater zone, flow in this zone, although it has a tendency to mimic surface profile, may contradict predicted flow directions due to the pressure differentials developed in the fracture systems. A detailed discussion on the hydrogeology at and in the vicinity of the 3M Decatur facility is provided in the 2008 PSDR. 2.5 FORMER SLUDGE INCORPORATION AREA From 1978 to 1998, 3M incorporated sludge from the on-site wastewater treatment plant by means of subsurface injection in an on-site area designated as the sludge incorporation area. Historically, sludge incorporation was undertaken, as an alternative to off-site sludge disposal, to utilize the nitrogen content, organic matter, phosphorus and other essential elements contained in the sludge for soil enrichment and crop production. This activity was conducted by 3M under ADEM National Pollutant Discharge Elimination System (NPDES) Permit No. AL0000205. The FSIA, as shown in Figure 2-3, was comprised of 13 application fields and two control fields where no sludge was applied. The sludge generated at the WWTP originated from the treatment of manufacturing facility wastewater, and contained approximately 1 to 3% solids. Sludge was hauled as a slurry by tank truck from the WWTP to the incorporation zone. The tank truck was equipped with a series of nozzles that injected the sludge approximately 1 foot below ground surface (ft bgs). Subsurface sludge incorporation was conducted in accordance with the NPDES permit. No direct surface application of sludge was permitted or believed to have occurred. 3M discontinued land application of sludge in 1998. The FSIA is no longer cropped and has reverted to natural vegetation. The 3M property, including the FSIA, is marked as a "no trespassing" zone and is routinely patrolled by 3M security personnel. An impermeable cap is being constructed by 3M over most of the FSIA as a means to accomplish the following: Isolate PFC-impacted soil from direct human contact, release to the air or contact with stormwater. Minimize potential vertical migration to groundwater via infiltration to groundwater. 2-6 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 This impermeable cap installation program is being performed by 3M under an NPDES Remedial Action Agreement between 3M and ADEM (ADEM, 2008). In addition, other areas at the facility are or will be undergoing remediation under this program, including the installation of an impermeable cap in the vicinity of Avenue A and the dredging of sediment from the Avenue A drainageway. 2-7 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 SECTION 2 FIGURES J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 Mallard - Fox Creek Industrial Park Port of the City of Decatur BP Chemical Co. Alpha Pet Facility Wetlands Edge Enviromental Center 3 ecatur Alabama Facility Daikin Trinity Joe W heeler Finley x Island Road Highway 20/72 -At oe State Docks Road 6 DeBruce Grain (Formerly Cargill, Inc.) Ascend Performance Materials (Formerly Solutia, Inc.) Decatur Utilities 72 Toray Fluorof bers America, Inc. Moulton 24 - 24 Decatur 24 1 Alabama Legend: City Boundary Major Roads Highways ------- Local Roads 0 ^ File: Y:\3MDec\MXD\former sludge inc area.mxd, 9/8/2014 11:46:41 AM, ricksc 0.5 ----- 1 ~ i Miles Figure 2-1 Site Location Map 3M Decatur, AL Facility Legend: Mi != -- B uilding s D aikin P roperty 3M Decatur P roperty B oundary D rainage to B akers C reek 0 File: Y:\3MDec\MXD\site feat No swflow.mxd, 8/21/2014 4:42:29 PM, ricksc 500 1,000 Feet w^ ! Figure 2-2 Site Features 3M Decatur, A L Facility Closed , Landfill DAIKIN M j,;^ ^ -- -- -- ** L'-. _i ^ e ld ,Ji (C o n tro l ,Field ) Field 14 (C ontrol Field) High i/72 Daikin Property Proposed Capped Areas 0 250 500 Feet File: \\Fsfed01\TIG\3MDec\MXD\Chemical_Plant\planning_area.mxd, 09-Jul-09 14:59, ricksc w Former Sludge Incorporation Area 3M Decatur, A L Facility 3. SUMMARY OF FIELD ACTIVITIES The sulfonates sampling program included the collection of data in various media and locations to characterize the presence of sulfonates both on-site and off-site. This section presents the technical approach used for performing field work under the MOU and the supplemental work activities. As noted previously, replicate sulfonate samples were generally collected along with PFOA samples generated per the MOU. The subsections are organized according to environmental media. Each subsection includes a description of the characterization tasks and the sampling activities conducted to fulfill the identified data needs and a summary of the analytical results. The sampling activities were generally determined based upon the MOU requirements for the PFOA on-site and off-site characterization program and the remedial design data needed for the voluntary site remediation activities. As described in Subsection 1.4, all samples were submitted to the 3M Environmental Laboratory in St. Paul, Minnesota, for sulfonate analysis, unless otherwise noted. 3.1 SOIL AND SEDIMENT 3.1.1 Phase 3 On-Site Soil Sampling in the FSIA Area Sampling of surface (0 to 6 inch bgs) and subsurface (1 to 1.5 ft bgs) soils in the FSIA Fields 5, 8C and 11 was performed in March 2010. This sampling was conducted to provide additional characterization of soil PFC concentrations in the FSIA fields as an input for the engineering design and construction of the multilayer cap currently being installed on the FSIA under the NPDES Remedial Action Agreement between 3M and ADEM. A summary of the soil analytical data is provided in Table 3-1 and Figure 3-1. The analytical data package is provided in Interim Report 01 (Appendix A-1). 3.1.2 Phase 3 Off-Site Soil and Sediment Sampling at the Wetlands Edge Environmental Center Area As described in the 2008 PSDR, sediment sampling was conducted in the off-site drainage area maintained by the WEEC on the BP property. The WEEC is located immediately west of the 3M Decatur facility's FSIA (Figure 2-2). This area was included in the assessment upon the 3-1 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 discovery that the WEEC pond/marsh was supplied with groundwater that was impacted by PFCs. In August 2007, sediment samples were collected from 14 locations in the WEEC pond area (EP01 through EP14), five locations in the drainageway upstream of the WEEC pond area (DU01 through DU05), two samples in the WEEC wetland area (DS01 and DS02) and two samples from an isolated pond southwest and not connected to the WEEC pond (WP01 and WP02). The WEEC pond and swamp are depicted in Figure 2-2. A summary of the sediment analytical data was provided in the 2008 PSDR. Based upon these findings and with approval from the property owner, 3M subsequently developed a work plan and removed the sediment from the WEEC pond to a depth of 3 feet followed by installation of a flexible membrane liner (FML) and clean soil backfill to restore the pond. The sediment removal project commenced in 2009 and was completed in 2010 with ADEM's approval. In June 2010, additional field sampling activities were performed at the WEEC area in conjunction with samples from the MOU PFOA Phase 3 Work Plan (WESTON, 2009). The field sampling activities included collection of 10 soil samples and 15 sediment samples from four transects established perpendicular to flow within the swamp area. Detailed information on these field activities is provided in the June 30, 2010 Quarterly Status Report (WESTON, 2010b) and the December 31, 2010 Quarterly Status Report (WESTON, 2010d). A summary of the sediment and soil analytical data is provided in Table 3-2 and Figure 3-2. The analytical data package is provided in Interim Report 03 (Appendix A-1). 3.1.3 Phase 3 Off-Site Soil Sampling at Monitoring Well Locations The Phase 3 Work Plan included the installation of off-site groundwater monitoring wells and collection of surface and subsurface soil samples during well installation (see Subsection 3.2.2). Soil samples were collected from the well soil borings at intervals to evaluate the potential vertical distribution trends in the deeper soil horizons. The depths established for sample collection were as follows: 3-2 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014  0 to 12 inches below grade. 1 to 2 feet below grade. 4 to 5 feet below grade. At the water table in the vadose zone (capillary fringe). Four off-site well clusters (i.e., 607, 609, 610 and 611) were installed between October 2010 and August 2011. The Phase 3 Work Plan under the MOU called for six additional new well cluster locations. However, two of the well clusters were not constructed because existing wells were used in their place with EPA approval. These included the proposed monitoring well clusters 606 and 608. Proposed well cluster 606 was replaced by sampling existing monitoring wells maintained by the BP facility (i.e., MW-47 and MW-121). Surface soil samples were collected proximate to the MW-47 and MW-121 well heads. Proposed well cluster 608 was eliminated and replaced by groundwater data generated by sampling the existing upgradient monitoring wells maintained by the Morgan County landfill (MW13S, MW-13I and MW13B) contemporaneously with other Phase 2 and Phase 3 monitoring wells. Soil samples were not collected from the Morgan County landfill location (see Subsection 3.2.2 for further discussion). Surface soil samples were collected from the 0- to 12-inch depth interval. Once the surface sample was collected, the rig was positioned at the location and drilling commenced for the residuum monitoring well. Subsurface soil samples were collected at the designated depths using split-barrel samplers and hollow-stem auger drilling techniques. Descriptions of the subsurface soil sampling activities are provided in the September 30, 2010 Quarterly Status Report (WESTON, 2010c) and the December 31, 2010 Quarterly Status Report (WESTON, 2010d) for wells 607 and 611R, 609R, 609L, 611R and 611L; in the March 31, 2012 Quarterly Status Report (WESTON, 2012a) for wells 607L, 610R and 610L; and in the September 30, 2011 Quarterly Status Report (WESTON, 2011c) for the locations near BP wells MW-47 and MW121. A summary of the soil analytical data is provided in Table 3-3 and Figure 3-3. The analytical data packages are provided in Interim Reports 12, 20 and 21 (Appendix A-1). 3-3 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 3.2 GROUNDWATER 3.2.1 On-Site Groundwater Monitoring On-site groundwater monitoring for sulfonates has been conducted since March 2003 when sampling commenced at eight Letter of Intent (LOI) wells located in the northern portion of the 3M Decatur facility. During Phase 2, a total of 27 groundwater monitoring wells were installed in the FSIA from October 2004 through January 2005. The eight initially monitored wells and the 27 groundwater monitoring wells installed during Phase 2 are listed in Table 3-4. During Phase 3, five additional groundwater wells (140R, 141R, 142R, 143R and 144S) were installed in the FSIA to replace wells that were abandoned during cap installation and to enhance the monitoring coverage in the FSIA. The wells were installed in August to September 2010. In addition, groundwater monitoring and extraction wells were installed in the WWTP area as described in Subsection 3.2.1.3. 3.2.1.1 Wells in the Chemical Plant Area and Northeast of the Closed Landfill 3M conducts routine groundwater monitoring for volatile organic compounds (VOCs) at certain wells in accordance with an agreement with ADEM under the Resources Conservation and Recovery Act (RCRA) program. 3M chose to obtain samples for sulfonates analysis from some of these wells located in the chemical plant. In addition, groundwater sampling was performed in the area northeast of an on-site landfill, previously closed under ADEM authorization. The wells sampled and a summary of the groundwater sulfonates analytical data are provided in Tables 3-5 through 3-7, for PFBS, PFHS and PFOS, respectively. The well locations and the results from the October 2013 (i.e., fourth quarter 2013) sampling event are depicted in Figure 3-4. Analytical data packages for the on-site wells in the chemical plant area and northeast of the closed landfill are provided in Interim Reports 02, 09, 17, 22, 27 and 36 (Appendix A-1) and ISO13-05-01 and ISO13-05-04 (Appendix A-2). 3.2.1.2 Wells and Pump Test in the FSIA As part of the FSIA capping program being executed under an NPDES Remedial Action Agreement, 3M has implemented a groundwater monitoring program to establish current conditions at the site and to provide adequate coverage for ongoing monitoring. The wells 3-4 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 sampled and a summary of the groundwater sulfonates analytical data are provided in Tables 3-8 through 3-10 for PFBS, PFHS and PFOS, respectively. The well locations and the results from the March 2014 (i.e., first quarter 2014) sampling event are depicted in Figure 3-5. Analytical data packages for the on-site wells in the FSIA are provided in Interim Reports 07, 11, 18, 24, 28 and 38 (Appendix A-1) and ISO13-05-02, ISO13-05-05, and ISO14-05-02 (Appendix A-2). In accordance with the NPDES Remedial Action Agreement, pump tests were performed in the FSIA at monitoring wells 144PZE1 and MW145S in June and December 2012. During each pump test, groundwater samples were collected from monitoring well MW145S and two piezometers (144PZE1 and 144PZE2). The sulfonate analytical data are provided in Table 3-11 and Figure 3-6. Additional detail on sampling activities was provided in the June 30, 2012 Quarterly Status Report and the September 30, 2012 Quarterly Status Report (WESTON, 2012b; 2012c). The analytical data packages from the FSIA pump tests are provided in Interim Report 34 (Appendix A-1). 3.2.1.3 Wells and Pump Test in the Wastewater Treatment Plant Six temporary monitoring wells (TW1R through TW6R) and one piezometer were installed throughout the WWTP area in March 2012 to obtain additional hydrogeologic and PFC analytical data under the NPDES Remedial Action Agreement with ADEM. The wells were sampled in April 2012, and a summary of the groundwater sulfonate analytical data is provided in Table 3-12 and Figure 3-7. Analytical data packages from the temporary monitoring wells in the WWTP are provided in Interim Report 31 (Appendix A-1). Three additional wells were installed in the WWTP area between June 11 and 14, 2012 (WW7R through WW9R). Pump testing was conducted in June 2012 at the new extraction wells, WW8R and WW9R. Groundwater samples were collected at the beginning, middle and end of the pump testing at these two wells, and these two wells were sampled on a monthly basis beginning in December 2012. Two additional extraction wells WW10R and WW11R were installed in June 2013 with monthly monitoring beginning in September 2013. The four groundwater extraction wells WW8R through WW11R form part of the groundwater extraction network, and groundwater is effectively treated by granular activated carbon (GAC) at the on-site groundwater treatment plant (GWTP). A summary of the groundwater sulfonate analytical data is provided in 3-5 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 Table 3-13 and Figure 3-8, and additional detail was provided in the June 30, 2012 Quarterly Status Report (WESTON, 2012b), the September 30, 2012 Quarterly Status Report (WESTON, 2012c) and the June 30, 2013 Quarterly Status Report (WESTON, 2013c). The analytical data package from the WWTP area pump test is provided in Interim Report 35 (Appendix A-1). Routine monthly extraction well monitoring analytical data packages are provided in the ISO Final Reports: ISO13-07-01, ISO13-07-02, ISO13-07-03, ISO13-07-04, ISO13-07-06, ISO1307-07 and ISO13-07-08 (Appendix A-2). 3.2.2 Phase 3 Off-Site Groundwater Summary Based on review of data generated during the MOU Phase 2 assessment, additional groundwater data were deemed necessary for adequately characterizing off-site groundwater conditions (i.e., gradients) and the potential lateral extent of PFOA in the area around the 3M Decatur property. The MOU Phase 3 Work Plan included the installation of additional off-site monitoring wells in the vicinity of the 3M Decatur facility. In accordance with the MOU Phase 3 Work Plan, four groundwater monitoring well clusters (607, 609, 610 and 611) were installed at off-site locations to further delineate the presence of PFOA away from the 3M property and to refine groundwater gradients monitoring beyond those clusters established by the MOU Phase 2 monitoring well network. These Phase 3 monitoring well locations and the locations of the Phase 2 well clusters are provided in Figure 3-9. Discussions of the Phase 3 off-site well construction activities were provided in the September 30, 2010 Quarterly Status Report (WESTON, 2010c), the December 31, 2010 Quarterly Status Report (WESTON, 2010d), and the September 30, 2011 Quarterly Status Report (WESTON, 2011c). A summary of the well construction details for the Phase 3 monitor wells is provided in Table 3-14. Well cluster 607 was installed to the west of the 3M facility, well cluster 609 was installed to the south, and well clusters 610 and 611 were installed to the east. Two existing wells on the BP property (MW-47 and MW-121), were sampled in place of well cluster 606 initially proposed in the Phase 3 Work Plan. Existing monitoring wells (MW13S, MW13I and MW13B) on the Morgan County landfill site were selected and sampled to obtain information on the off-site groundwater elevations and quality in the area southwest of the facility. Using these existing monitoring wells eliminated the need for the installation of the 3-6 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 proposed well cluster 608. The use of the four installed Phase 3 well clusters and the two alternate locations to achieve the Phase 3 off-site groundwater monitoring objectives was described in the Technical Memorandum on Completion o f the Phase 3 Off-Site Groundwater Monitoring Program (Technical Memorandum) (WESTON, 2012e) and discussed at a meeting with the EPA on September 20, 2012. Additional detail is contained in Subsection 3.2.3 and associated quarterly status reports. In accordance with the MOU Phase 3 Work Plan, one round of groundwater sampling was performed in October and November 2010 following the initial installation of some of the Phase 3 off-site groundwater monitoring wells. 3M voluntarily collected samples for sulfonate analysis from these off-site wells during the MOU Phase 3 groundwater sampling activities. A summary of the sampling results is provided in Tables 3-15 through 3-17 for PFBS, PFHS and PFOS, respectively. Analytical results from the final round of sampling in March and April 2012 are summarized in Figure 3-9. The Morgan County landfill wells were sampled in November 2010 and April 2012, and the analytical results are summarized in Table 3-18 and Figure 3-10 (see Subsection 3.2.4.1 for additional discussion). Analytical data packages from the off-site sampling at the Morgan County landfill are provided in Interim Reports 13 and 29 (Appendix A-1). Delays in obtaining access to properties for well construction and the ultimate inclusion of the BP wells (MW-47 and MW-121) into the off-site groundwater monitoring network resulted in the collection of the groundwater samples from the remaining MOU Phase 3 monitoring wells over an extended period. 3M performed a final sampling round at the off-site Phase 2 and Phase 3 monitoring wells as part of a single monitoring event to capture a complete contemporaneous data set. This re-sampling was performed in March and April 2012 as part of the regional groundwater sampling event and is discussed in the following subsection. Analytical data packages from the Phase 2 and Phase 3 off-site groundwater monitoring wells are provided in Interim Reports 10, 13, 19, 23 and 29 (Appendix A-1). 3-7 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 3.2.3 Regional Groundwater Sampling and Analysis and Conclusion of the Phase 3 Off-Site Groundwater Monitoring Program To establish regional groundwater conditions and PFOA concentrations, a contemporaneous well sampling event was completed in April 2012 for the 3M Decatur property and regional monitoring locations. Well sets in the sampling program included the following: On-site chemical plant and closed landfill wells (200 and 300 series wells). On-site FSIA wells (100 series wells). Off-site regional wells (600 series wells). Selected BP facility wells. Selected Morgan County landfill wells (see also Subsection 3.2.4.1). Browns Ferry Road Site (see also Subsection 3.2.4.3). The intent of the program was to gather sufficient data on groundwater elevation and PFOA concentrations within a short timeframe to be representative of groundwater conditions for the area in and around the 3M Decatur facility. 3M voluntarily collected samples for sulfonate analysis during the regional groundwater sampling event, and the analytical data are summarized in Section 3 tables and figures (see Tables 3-5 through 3-10, Tables 3-16 and 3-17 and Figures 3 4, 3-5 and 3-9 through 3-12; in addition see Tables 3-18 through 3-20 and Figures 3-10 and 3-15 through 3-17 for data on the Morgan County, BFI and BFR landfills, which are discussed in detail in Subsection 3.2.4). Findings from this sampling event were used to evaluate groundwater conditions in the vicinity of the 3M Decatur facility. Depth-to-groundwater measurements from monitoring wells in the series listed above were used to develop regional groundwater elevation data. Figures 3-13 and 3-14 depict the residuum and bedrock groundwater elevations observed, respectively. The findings from the regional groundwater sampling were discussed in the Technical Memorandum (WESTON, 2012e) that was submitted to the EPA prior to a meeting between 3M, WESTON and the EPA on September 20, 2012. The Technical Memorandum provided a summary of the PFOA analytical results from the regional groundwater sampling, a description of the rationale for installation of the Phase 3 off-site monitoring wells and an analysis of groundwater 3-8 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 conditions at and surrounding the 3M Decatur facility. Conclusions regarding regional groundwater conditions were presented in a Technical Memorandum and are incorporated into Section 4 of this report. During the September 2012 technical consultation, the EPA agreed with the findings presented in the Technical Memorandum and agreed that there was no need to install the 608 well cluster. 3.2.4 Phase 3 Assessment of Off-Site Waste Disposal Facilities In accordance with the MOU Phase 3 Work Plan, groundwater use surveys were performed within a 2-mile radius of the Morgan County landfill, the BFI Morris Farm landfill and the former Bert Jefferies landfill (hereafter referred to as the Browns Ferry Road Site (BFRS)). As documented in the January 2008 DAR, wastes potentially containing PFOA from the 3M Decatur facility may have been disposed at these three disposal facilities. Their locations with respect to the 3M Decatur facility are shown in Figure 3-15. As part of the Phase 3 assessment, characterization activities were performed at each of the sites. Specific tasks included the following: Completion of reconnaissance and file review within a 2-mile radius of each facility to identify land use and the availability of municipal water. Review of landfill records and operational practices to establish site groundwater conditions and development of a monitoring program for PFOA. Conducting limited groundwater sampling at each of the three landfill sites to characterize the presence of PFOA in groundwater and to confirm local groundwater gradient patterns. 3M voluntarily collected samples for analysis of sulfonates in addition to the PFOA sampling activities at these off-site waste disposal facilities. The following subsections provide the results of this effort. 3.2.4.1 Morgan County Landfill The Morgan County/City of Decatur landfill is located approximately 2 miles west of the 3M property along U.S. Highway 20 (see Figure 3-15). The facility was identified during the MOU Phase 2 assessment as the primary off-site facility used by 3M for disposal of solid waste. The 3-9 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 Morgan County/City of Decatur landfill is located approximately 2 miles west of the 3M property along U.S. Highway 20 (see Figure 3-15). The facility was identified during the MOU Phase 2 assessment as the primary off-site facility used by 3M for disposal of certain solid wastes. From approximately 1960 until 1973, 3M sent wastes such as ordinary solid waste (i.e., paper and plastic items), out-of-specification polyester film, film trimmings, polyester pellets and wood pallets to the landfill for disposal. In addition, Site records indicate that from 1973 to 1978 and from 1998 to present, 3M sent/sends sludge residues from the 3M WWTP to the landfill for disposal. Groundwater Use Survey The Phase 2 water use survey of the area within a 5-mile radius of the 3M Decatur facility conducted in 2007 identified 14 properties in the vicinity of the Morgan County landfill potentially using groundwater as a water source. Based on the Phase 3 groundwater use survey in the area of Morgan County landfill conducted in 2013, five of the previously identified 14 properties occur within 2 miles of the landfill facility. Four of the five properties are located approximately 2 miles west of the landfill along County Road 433. Reconnaissance of the properties indicates that they rely on private wells for potable water. Public water is unavailable to this area. Groundwater flow directions in the vicinity of the Morgan County landfill were established based upon a review of documents related to the site that were obtained from an ADEM file search. Based on an established groundwater flow direction at Morgan County landfill to the north/northeast and the relative position of the residences crossgradient (west) of the landfill, the potential to impact the wells on the properties by the landfill is highly unlikely. This premise is further supported by the presence of several surface water drainage features associated with Fox Creek occurring between the Morgan County landfill and the residences to the west that would likely serve as a hydraulic barrier for groundwater flow. The fifth property occurs approximately 1.75 miles southeast of Morgan County landfill along North Greenway Drive. Two houses are located on this property. One meter box was observed on the site suggesting that one or both houses receive potable municipal water. There was no 3-10 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 indication of private wells on the site. Based on the regional groundwater gradient and the groundwater data for Morgan County Landfill, groundwater flow at the landfill is from the south-east to the northeast. Thus, the landfill is 1.75 miles downgradient from the North Greenway Drive property. Therefore it is highly unlikely that groundwater from the landfill has any impact on the groundwater at the North Greenway Drive property. Groundwater Monitoring A groundwater sampling program was developed to assess conditions in and around the Morgan County landfill using 14 existing groundwater monitoring wells identified on-site. Sampling was conducted on November 2010 (14 wells) and in April 2012 (three wells). A summary of the groundwater analytical results is provided in Table 3-18 and Figure 3-10. Additional information on sampling activities was provided in the December 31, 2010 Quarterly Status Report (WESTON, 2010d) and the June 30, 2012 Quarterly Status Report (WESTON, 2012b). Analytical data packages from the groundwater sampling at the Morgan County landfill are provided in Interim Reports 13 and 29 (Appendix A-1). 3.2.4.2 BFI Morris Farm Landfill The BFI Morris Farm landfill is located in a rural area of Lawrence County off County Road 418, approximately 4 miles west of the junction of Mallard Creek and the Tennessee River (see Figure 3-15). Sludge from the 3M Decatur WWTP has been sent to the BFI landfill for disposal. Groundwater Use Survey The Phase 3 groundwater use survey performed within a 2-mile radius of the BFI Morris Farm landfill identified 30 residential properties. Of the 30 residences, two properties are believed to use private wells for potable water. One of the properties is located approximately 1.5 miles west to northwest of the BFI Morris Farm landfill. Based on file review and elevation measurements during sampling, groundwater data from the landfill indicate a groundwater flow gradient east to southeast toward a tributary to Dry Creek. As a result, the residential property is considered upgradient to the landfill with a low potential for groundwater impact from landfill activities. Groundwater flow directions in the vicinity of the BFI Morris Farm Landfill were established based upon a review of documents related to the site that were obtained from an ADEM file 3-11 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 search. The second property is located approximately 2 miles southwest of the BFI Morris Farm landfill along County Road 420. Based on the documented groundwater flow gradient at the landfill east to southeast and the relative positioning of the two properties, it is expected that the residential property is upgradient to the landfill with a low potential for impact by landfill activities. Additionally, review of local topography indicates that the residence is situated on the west side of a topographic divide separating the property from the landfill. It is likely that this divide also reflects a line of divergent groundwater flow that would serve as a hydraulic barrier between the two locations. Groundwater Monitoring Groundwater sampling was performed at seven existing monitoring wells at the BFI Morris Farm landfill in March 2011. A summary of the groundwater analytical results is provided in Table 3-19 and Figure 3-16. Additional information on the sampling activity was included in the June 30, 2011 Quarterly Status Report (WESTON, 2011b). The analytical data package from the groundwater sampling at the BFI Morris Farm Landfill is provided in Amended Interim Report 14 (Appendix A-1). 3.2.4.3 Browns Ferry Road Site The Browns Ferry Road Site (BFRS) is located in northern Lawrence County along County Road 386, approximately 1 mile south of Mallard Creek (see Figure 3-15). The landfill was constructed by Bert Jefferies Construction Company, which entered into an agreement with 3M in 1977 to haul waste, including scrap rolls of film, drums of solid plastic and broken pallets. 3M disposal stopped in 1983 when the landfill ceased operations. The BFRS was purchased by 3M in 2011. 3-12 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 Groundwater Use Survey The Phase 3 groundwater use survey conducted in the area of BFRS identified 11 residences (including one that is abandoned) within a 2-mile radius of the BFRS that potentially rely on private wells for potable water. Of the 11 properties, 8 are located north of Dry Creek at the cove formed by the Mallard Creek confluence with the Tennessee River approximately 1.2 miles northwest of the BFRS. Reconnaissance indicates that a public water supply is not available to the properties. Although groundwater from the BFRS has been shown to flow north/northeast, it is likely that Dry Creek (located between the properties and the BFRS) serves as a hydraulic barrier preventing continued northerly flow of groundwater beyond the creek basin. Consequently, the potential for impact to groundwater at these residential properties by BFRS is considered low. One residential property is located approximately 'A mile northwest of the BFRS. Groundwater data for the BFRS indicate the gradient flow for residuum and bedrock groundwater is northeast, presumably turning north toward Dry Creek. Local topography would suggest that groundwater at the residential site also flows to the northeast, resulting in a relative positioning of the residential property crossgradient from the BFRS with a low potential for impact by groundwater from the BFRS. Groundwater flows in the vicinity of the BFRS were established based upon groundwater level measurements taken at the site. The remaining two properties are located approximately 2 miles southeast of the BFRS. Based on the groundwater data for the BFRS and the local topography, these properties are presumed to be upgradient to crossgradient of the BFRS with a low potential for groundwater influence from the BFRS. Groundwater Monitoring In 2011, following 3M's purchase of the property and, as specified in the Phase 3 Work Plan, a groundwater sampling program was initiated at the site. During the initial reconnaissance of the property, seven existing wells were identified, including one well that was damaged and unusable and one possible water supply well that was deemed unsuitable for monitoring. The remaining five wells were monitoring wells that were determined to be suitable for groundwater 3-13 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 sampling. In February 2012, an additional nine monitoring wells were installed at the BFRS, as described in the March 31, 2012 Quarterly Status Report (WESTON, 2012a). Groundwater sampling of 14 monitoring wells was conducted in April 2012, October 2012 and August 2013. A summary of the analytical data is provided in Table 3-20 and the most recent data set (August 2013) is presented on Figure 3-17. Additional information on sampling activity was included in the June 30, 2012 Quarterly Status Report (WESTON, 2012b), the December 31, 2012 Quarterly Status Report (WESTON, 2012d) and the September 30, 2013 Quarterly Status Report (WESTON, 2013d). Analytical data packages from groundwater sampling at the BFRS are provided in Interim Reports 30 and 37 (Appendix A-1) and ISO13-05-03 Final Report (Appendix A-2). 3.3 FISH SAMPLING Since 2000, 3M has assessed PFC levels in fish and surface water in the Tennessee River with the involvement and approval of ADEM. In April 2012, fish sampling was performed at three adjoining reaches, spanning a distance of 2.5 miles in the Tennessee River in the immediate vicinity of the 3M Decatur facility, to characterize concentrations of PFOS in skin-off filet samples from largemouth bass (Micropterus salmoides). A total of 26 largemouth bass were collected between the three sampling reaches with 10 fish each from the upper reach above the mouth of Bakers Creek and the middle reach at the mouth of Bakers Creek and six fish from the lower reach below the mouth of Bakers Creek. Fish filet tissue PFOS concentrations are summarized in Table 3-21 and shown in Figure 3-18. In addition to collecting fish samples, surface water samples were collected from each fish sampling reach for PFOS analysis. Surface water PFOS concentrations are summarized in Table 3-22 and shown in Figure 3-19. Additional details on the spring 2012 fish tissue sampling event are provided in the report titled, Fish Sampling and Analysis for PFOS in Largemouth Bass from the Tennessee River in the Vicinity o f 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 ISO12-0101-01 and ISO12-01-01-02 Final Reports. (Appendix A-2). Appendix A-3 includes the analytical data package produced by AXYS Analytical laboratories, a third-party laboratory at which split samples were analyzed. 3-14 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 In fall 2012, the most comprehensive fish PFC data set developed to date in the study area was collected. This sampling was performed to characterize the current concentrations of PFOS in filet samples from largemouth bass (Micropterus salmoides) and channel catfish (Ictalurus punctatus). In addition, several other PFCs, including PFBS and PFHS, which are subject to monitoring in the 3M Decatur facility's NPDES permits issued by ADEM, were included as target analytes (WESTON, 2012). Fish tissue samples (filets) were collected at 13 reaches in the Wheeler Reservoir and two reaches in the Wilson Reservoir of the Tennessee River over an approximately 56-river mile (RM) portion of the Tennessee River from RM 320 near Triana, Alabama, downstream to RM 264 above Florence, Alabama. Ten fish specimens, consisting of five largemouth bass and five channel catfish, were collected from each of the 15 sampling reaches, and skin-off filet samples were prepared. Excluding duplicates, a total of 150 fish samples were collected for analysis. A summary of the sulfonate analytical results for fish is provided in Table 3-23. Additionally, sample reach locations and analytical results are shown in Figures 3-20 through 3-22, for PFBS, PFHS and PFOS, respectively. Additional details on the fall 2012 fish tissue sampling event were provided in the Tennessee River Perfluorochemical (PFC) Assessment Fish Tissue and Surface Water Sampling Report, October-December 2012 (WESTON, 2013e; Appendix C) and the March 31, 2013 Quarterly Status Report (WESTON, 2013b). The analytical data from fish tissue sampling are provided in the ISO 12-01-01-04 Final Report (Appendix A-2). Appendix A-3 includes the analytical data package produced by AXYS Analytical laboratories, a third-party laboratory at which split samples were analyzed. 3.4 SUPPLEMENTAL SURFACE WATER SAMPLING Surface water sampling was performed in the Tennessee River in fall 2012 in conjunction with the fish sampling described above. Three surface water samples were collected from each of the 15 fish sampling reaches, for a total of 45 primary samples, to develop co-located data on PFC concentrations in fish filet and surface water media. Surface water sampling at the fish sampling reaches occurred between November 16 and 20, 2012. Following the surface water sampling at the fish sampling locations, additional surface water samples were collected throughout the same stretch of the Tennessee River at nine surface water 3-15 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 transects extending across the width of the Tennessee River. Ten surface water samples were collected from evenly spaced locations along each of the nine transects between December 3 and 5, 2012. Transect sampling across the Tennessee River was performed to develop data on potential sources of PFCs to the river and mixing characteristics within the study area. Additional details on the fall 2012 surface water sampling were included in the Tennessee River Perfluorochemical (PFC) Assessment Fish Tissue and Surface Water Sampling Report, October-December 2012 (WESTON, 2013e, Appendix B) and the March 31, 2013 Quarterly Status Report (WESTON, 2013b). Excluding duplicates, a total of 135 surface water samples were collected for analysis. A summary of the sulfonate analytical results for surface water samples from the sampling fish reaches and transect sampling locations is provided in Tables 3-24 and 3-25, respectively. Sampling locations and analytical results for the fish sampling reach surface water and transect surface water sampling are shown in Figures 3-23 and 3-24, respectively. Analytical data packages from Tennessee River surface water sampling are provided in the ISO12-01-01-03 Final Report and E12-0849 Revised Final Report (Appendix A-2). Appendix A-3 includes the analytical data package produced by AXYS Analytical laboratories, a third-party laboratory at which split samples were analyzed. 3.5 CHARACTERIZATION ACTIVITIES IN SUPPORT OF ON-SITE REMEDIAL DESIGN AND OFF-SITE ENVIRONMENTAL ASSESSMENT 3.5.1 Avenue A Drainageway The evaluation of Phase 2 data for the Avenue A drainageway indicated the presence of PFOA and sulfonates in surface water and sediment. As part of 3M's commitment to ADEM, a program was initiated to identify and reduce the PFOA sources and discharges at the Decatur facility. Under the NPDES Remedial Action Agreement, 3M further assessed the Avenue A drainageway to identify the potential sources to the Avenue A drainageway and Bakers Creek at the mouth of the Tennessee River. 3M initiated assessment activities in the upgradient areas to the Avenue A drainageway from June 22 through July 9, 2010 to identify the potential sources for PFOA and sulfonates. Twelve temporary monitoring wells were installed. In addition, surface water, sediment, soil and groundwater samples were collected from the Avenue A drainageway, ancillary tributaries and 3-16 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 surrounding upland areas. Summaries of the sulfonate data are provided in Table 3-26 and Figures 3-25 and 3-26. Potential sources of PFCs associated with the fire training area (FTA), a drainage feature north of the closed landfill and a marsh located west of the closed landfill were identified. A summary of the work performed in these areas is provided in the September 30, 2010 Quarterly Status Report (WESTON, 2010c). Analytical data packages from the Avenue A sampling in June 2010 are provided in Interim Reports 05 and 06 (Appendix A-1). Following the completion of the initial assessment activities in the Avenue A drainageway and associated areas, additional assessment activities were conducted at potential source areas in January 2011. Groundwater sampling was performed on January 27, 2011 at two of the temporary wells and at one permanent well (210R) in the Avenue A drainageway area. A summary of the work performed was provided in the March 31, 2011 Quarterly Status Report (WESTON, 2011a). A summary of the analytical data is provided in Table 3-27 and Figure 3-27. The analytical data package from the Avenue A groundwater sampling in January 2011 is provided in Interim Report 16 (Appendix A-1). Soil and sediment sampling was performed at 26 locations within the Avenue A drainageway and associated areas in January 2011. A summary of the work was provided in the March 31, 2011 Quarterly Status Report (WESTON, 2011a). A summary of the analytical data is provided in Table 3-28 and Figure 3-28. Analytical data from the Avenue A soil and sediment sampling in January 2011 is provided in Interim Report 15 (Appendix A-1). 3.5.2 On-Site Soil Sampling Adjacent to FSIA Field 6 In December 2012, soil borings were conducted at three locations in an area to the east of FSIA Field 6 to determine whether any surficial controls (i.e., cover or capping) should be considered for this area. Soil samples were collected from the 0- to 0.5-foot and 5- to 5.5-foot depth intervals from each of the soil borings. A summary of the analytical data is provided in Table 3 29 and Figure 3-29. The analytical data package from the sampling adjacent to FSIA Field 6 is provided in the ISOE12-0849 (Appendix A-2). 3-17 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 3.5.3 Browns Ferry Road Site In addition to the groundwater samples collected at the BFRS and described in Subsection 3.2.5.3, 3M conducted additional assessment activities to further characterize site conditions. Surface water and sediment sampling was conducted in February 2012 and October 2012. In February 2012, surface water and sediment sampling was conducted at four sample locations, ET-01 through ET-04 (see Figures 3-30 and 3-31). As a confirmatory measure, additional surface water samples were collected in October 2012 from on-site locations (ET-02 and ET-04; ET-01 was dry at the time of sampling), from off-site locations downgradient of the site (ET-05 and WT-01) and at a location in Dry Creek downstream of the BFI Morris Farm landfill facility (DC-01). Details of the sampling activities were provided in the March 31, 2012 Quarterly Status Report (WESTON, 2012a), the June 30, 2012 Quarterly Status Report (WESTON, 2012b) and the December 31, 2012 Quarterly Status Report (WESTON, 2012d). A summary of the analytical data is provided in Tables 3-30 and 3-31 and Figures 3-30 and 3-31. Analytical data packages from the BFRS soil and sediment sampling are provided in Interim Reports 25 and 26 (Appendix A-1). 3-18 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 SECTION 3 FIGURES J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 LO o LO o LO o o o oLO CO o CO ll Q LO o o o Field 8a SampleID Depth 0 .0 - 0.5 DF11-SS07 PFBS 4.26 ND PFHS 86.8 1.95 PFOS 18900 4960 A SampleID Depth 0.0 - 0.5 DF11-SS06 1.0 - 1.5 PFBS 0.320 0.139 Field 11 PFHS 4.62 2.01 PFOS 1050 659 SampleID Depth PFBS PFHS PFOS 0.0 - 0.5 0.919 10.1 1500 DF11-SS05 1.0 - 1.5 0.227 (0.185) 3.21 (2.98) 1140 (1360) SampleID Depth 0.0 - 0.5 DF05-SS10 1.0 - 1.5 PFBS ND ND PFHS 2.16 1.27 PFOS 1080 237 SampleID Depth DF8c-SS01 1.0 - 1.55 PFBS 0.156 0.222 PFHS 0.681 1.39 < -I SampleID Depth 0.0 - 0.5 DF8c-SS02 1.0 - 1.5 PFOS 159 356 PFBS ND ND Field 8b PFHS 0.563 0.345 PFOS 121 91.8 SampleID Depth 0.0 - 0.5 DF05-SS09 1.0 - 1.5 PFBS ND ND PFHS 0.283 0.164 PFOS 410 88.4 Field 5 SampleID Depth 0.D- 0.5 DF05-SS08 1.0 - 1.5 PFBS ND ND PFHS 0.156 ND PFOS 101 59.8 SampleID Depth 0 .0 - 0.5 DF8c-SS03 1.0 - 1.5 PFBS 2.17 1.33 (1.38) PFHS PFOS 11.2 874 10.4 (10.5) 1550 (1530) SampleID Depth 0 .0 - 0.5 DF8c-SS04 1.0 - 1.5 PFBS ND ND PFHS 0.290 0.333 PFOS 242 302 SampleID Depth 0.0 - 0.5 DF05-SS07 PFBS ND ND PFHS 0.357 0.467 PFOS 49.4 4.74 Field 14 Field 8C 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) SampleID Depth 1.0 - 1.5 PFBS 0.198 6.62 PFHS 1.48 27.1 PFOS 276 508 Highway 20/72 SampleID Depth 0 .0 - 0.5 DF05-SS06 1.0 - 1.5 PFBS 0.187- ND (ND) PFHS 0.161 ND (ND) PFOS 35.8 48.4 (42.1) cr 350 175 0 Feet N s File: Y:\3MDec\MXD\Sulfonate\2013\concentrations_onsite_MarApril2010.mxd, 12/9/2013 8:19:39 AM, ricksc Figure 3-1 PFBS, PFHS and PFOS Concentrations in On-Site Former Sludge Incorporation Area Soils March 2010 Decatur, AL Sample ID WESD2 WESD2 (DUP) PFBS 0.379 0.365 PFHS 1.92 1.88 PFOS 336 363 Legend: A Sediment and soil sampling locations WES Sediment sample from WEEC swamp N /H t W WEU Upland soil sample adjacent to WEEC swamp Notes: -PFBS, PFHS and PFOS concentrations represent the s 450 225 0 Feet __ i average of primary and duplicate analytical results in ng/g (ppb, dry weight) \V Vi rg-)! jN 1 -Field duplicate results listed below primary field samples. File: Y:\3MDec\MXD\Sulfonate\2013\WEEC results.mxd, 12/9/2013 8:21:51 AM, ricksc Figure 3-2 Wetlands Edge Environmental Center Average Sediment and Soil PFBS, PFHS and PFOS Concentrations June 2010 Decatur, AL D epth 0 - 0.5 / MW 47 PFBS PFHS PFOS 0.239 ------- ----- < 0.200 10.2 -- *** r \ i*- , 'I D e p th u - u.o fe M W 121 1 PFBS 0.343 PFHS <<u0.z.2u0i 0 PFOS 10.1 D e p th 0- 1 1- 2 1 - 2 (DUP) 4-L 27 - 28 607R PFBS PFHS 0 .4 8 0 < 0.200 < 0.500 < 0.200 < 0.500 < 0.200 < 0.500 < 0.200 < 0.500 < 0.200 PFOS 14.7 2 0 .0 2 3 .0 4.61 < 0.200 T * Depth 0- 1 1- 2 4- 5 5- 6 V 611R PFBS PFHS 0.417 < 0.200 0.548 0.658 < 0.500 < 0.200 < 0.500 < 0.200 PFOS 21.8 14.6 4.67 2.73 tali. * . ' -_ j Highway 20/721 a Depth 0- 1 1- 2 4-5 11 - 12 609R PFBS PFHS 0.517 0.195 < 0.500 < 0.200 < 0.500 < 0.200 < 0.500 < 0.200 rr PFOS 24.0 9.08 1.07 < 0.200 Depth 0- 1 1- 2 4- 5 15 - 17 PFBS 0.991 0.439 0.572 < 0.200 PFHS 0.586 0.690 1.11 < 0.200 PFOS 36.1 19.5 3.00 < 0.200 Legend M onitoring W ell Locations 0 1,250 2,500 Feet Facility Boundary 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__________________________ File: Y:\3MDec\MXD\Sulfonate\2013\Offsite MW SB.mxd, 8/22/2014 7:55:37 AM, ricksc w^ Imagery: ESRI Bing Mapping Service F ig u re 3-3 P h a se 3 O ff-S ite M o n ito rin g W e ll S oil B o rin g A verage PFBS, PFH S and PFO S e C o n ce n tra tio n s S epte m be r/O cto ber 20 10 - A u g u st 2011 D ecatur, A L PFBS < 0.0250 317L PFHS 0 .0 9 8 6 PFQS 0 .2 4 3 PFBS 430 RW 331S PFHS 161 PFOS 461 PRBS 1310 310R PFHS 307 PFQS 767 Tennessee River/ Wheeler Reservoir PFBS 1240 335R PFHS 1660 PFQS 6480 PFBS 7260 RW 312R PFHS 1300 PFBS 7 2 .2 PFQS 2860 324L PFHS 5 4 .3 PFQS 7 7 .9 PFBS 3 3 .2 PFBS 4 5 .3 PFHS 5 1 .7 328L PFHS 1 6 .9 PFQS 270 PFQS 1 .2 4 Avenue A PFBS 2 3 .7 203L PFHS 147 PFQS 791 PFBS 4 5 .5 222R PFHS 308 PFQS 459 Closed Landfill PFBS 2780 GRSO4 PFHS 9340 IE 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. PFQS 2820 PFBS 8 .1 2 PFBS 4 .9 6 PFBS 15.1 PFBS 259 220R PFHS 4 0 .3 220L PFHS 1 7 .3 227R PFHS 57.1 227L PFHS 8 2 .5 _ PFQS 7 8 .9 PFQS 4 9 .6 PFQS 657 PFQS 832 Legend: Groundwater sampling locations R - Residuum Well S - Epikarst Well L - Bedrock ell 450 225 0 Feet N s File: Y:\3MDec\MXD\Sulfonate\2013\Chemicalplant_dosedlandfiN_Qctober2013.mxd, 12/18/2013 12:03:38 PM, johna Figure 3-4 On-Site Chemical Plant and Closed Landfill Area Groundwater PFBS, PFHS and PFOS Concentrations October 2013 Decatur, AL 7t Well ID 131S PFBS 68.2 0.996 2.98 PFHS 6.08 PFOS 1150 6.83 45.7 W ell ID 130R 130S 130L PFBS 16.8 4.32 1.58 PFHS 120 34.9 10.7 PFOS 514 148 67.9 /l - oaa Well ID PFBS CW26C 7.64 CW26L 15.8 PFHS 57.9 122 PFOS 436 1550 Well ID 133R 133S 133L PFBS 2.28 10.3 9.53 PFHS 15.5 73.4 72.7 PFOS 25.4 319 514 Well ID PFBS 1.47 PFHS 15.0 PFOS 129 PFBS 0.0720 PFHS 0.394 PFOS 6.79 Well ID 136R 136S 136L Well ID PFBS PFHS 134R 52.1 520 134S 0.496 6.10 134L 9.89 92.7 1 J----- PFBS PFHS PFOS NS[D] NS[D] NS[D] 3.31 20.2 127 2.44 16.5 94.7 PFOS 1450 23.9 501 1 i V. 1 Well ID 138R 138S 138L PFBS 8.68 5.83 0.0324 PFHS 37.7 26.3 0.0690 PFOS 369 305 0.362 Well ID 145S PFBS 0.811 PFHS 3.99 PFOS 91.0 Well ID 135R 135S 135L PFBS 65.1 2.26 PFHS 734 26.1 78.5 -- PFOS 1470 24.1 92.6 Well ID 142R PFBS 2.63 PFHS 14.4 PFOS 206 ___ . Well ID PFBS 143R 1 39 ---- 1------- 1 -- PFHS 5.01 PFOS 24.8 Well ID ~7~ 137R 137S 137L PFBS NS[D] 0.188 0.105 PFHS NS[D] 0.265 0.114 PFOS NS[D] 0.703 1.69 Legend: ^ Groundwater Sampling Location I---" I Daikin Property Note: R - Residuum Well S - Epikarst Well L - Bedrock Well 800 400 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. 0 Feet * '^ E F ig u re 3-5 O n -S ite F o rm e r S lu d g e In c o rp o ra tio n A re a G ro u n d w a te r PFBS, P FH S and P FO S C o n ce n tra tio n s M arch 2014 D ecatur, A L IW W . *' gj Well ID 144PZE1 144PZE2 Date 6/3/2012 6/3/2012 PFBS 2.76 3.62 PFHS 13.1 17.0 PFOS 150 179 Well ID 145S 145S 145S 145S Date 6/4/2012 6/5/2012 6/6/2012 12/4/2012 PFBS 1.90 1.28 1.23 1.59 PFHS 8.22 5.79 5.69 7.43 PFOS 63.9 55.1 57.6 118 Legend Groundwater Sampling Locations 0 Feet 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. 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 Figure 3-6 Groundwater Average PFBS, PFHS and PFOS Concentrations On-Site Former Sludge Incorporation Area Pump Test June 2012 and December 2012 ________________ Decatur, AL________________ Well ID PFBS TW1R 33.8 PFHS 57.3 PFOS 29.0 L 328R Well ID PFBS TW6R 156 ________ a Well ID PFBS TW2R 117 PFHS 579 PFHS 46.7 PFOS 281 PFOS 1090 Former Location of Sludge Ponds - Closed 4th Quarter, 2011 Well ID PFBS TW5R 522 PFHS 43.0 PFOS 696 Well ID PFBS TW4R 184 Well ID PFBS TW3R 304 PFHS 19.1 PFOS 247 PFHS 1310 PFOS 3660 Legend < Existing Monitoring Wells < Temporary Monitoring Well (TW) 225 112.5 A Temporary Piezometer Well (PZ) Note: -Sulfonate concentrations are the averages of primary and duplicate sample analytical results in ng/mL (ppb). File: Y:\3MDec\MXD\Sulfonate\2013\WWTP_locs_.mxd, 10/9/2013 2:48:15 PM, ricksc 0 Feet Imagery Source: ESRI, Bing Mapping Service F ig u re 3-7 W a s te w a te r T re a tm e n t P la n t A re a G ro und w a ter A vera ge P FB S , P F H S an d P F O S C o n ce n tra tio n s A p ril 20 1 2 D ecatur, A L Date Pump T est (June 2012) 12/13/2012 1/17/2012 2/13/2013 3/27/2013 4/29/2013 5/31/2013 6/27/2013 7/23/2013 9/30/2013 10/28/2013 11/18/2013 12/13/2013 1/30/2014 2/27/2014 3/31/2014 4/23/2014 5/15/2014 6/25/2014 WW8R PFBS PFHS 575 2610 489 2280 453 2070 441 1740 410 1930 354 1900 385 1760 364 1610 289 1330 282 1340 263 1260 303 1370 312 1300 362 1440 316 1270 326 1460 331 1370 357 1470 283 1180 290 1160 285 1240 PFOS 5280 4550 4170 4920 5710 4850 5120 4830 4180 4110 3910 4100 4410 4750 4060 3990 4170 5790 3840 4230 4210 Pump Test (June 2012) *9 i * . , . 12/13/2012 1/17/2012 2/13/2013 3/27/2013 4/29/2013 5/31/2013 6/27/2013 7/23/2013 9/30/2013 10/28/2013 11/18/2013 12/13/2013 1/30/2014 2/27/2014 3/31/2014 4/23/2014 5/15/2014 6/25/2014 WW9R PFHS 233 1290 248 1340 254 1330 1480 184 954 236 1400 278 1440 244 1200 226 1120 225 1140 212 1030 249 1220 286 1280 305 1340 259 1170 317 1460 270 1370 341 1550 257 1120 266 1140 274 1270 i PFOS 2620 2610 2550 4080 3690 4100 4660 4340 4210 4150 3670 4200 4380 4540 4190 4800 4660 5420 3820 4790 4470 I Date 9/30/2013 10/28/2013 11/18/2013 12/13/2013 1/30/2014 2/27/2014 3/31/2014 4/23/2014 5/15/2014 6/25/2014 -- 1--------------- WW10R PFBS PFHS 247 1030 264 1030 303 1120 239 885 250 757 260 935 278 1030 243 885 220 823 240 948 PFOS 2770 3160 3890 2920 1570 2860 3490 2130 2680 2860 *m Date 9/30/2013 10/28/2013 - 11/18/2013 12/13/2013 1/30/2014 2/27/2014 3/31/2014 4/23/2014 5/15/2014 6/25/2014 WW11R PFBS PFHS 299 1000 240 511 287 680 198 512 168 362 262 696 254 549 212 527 237 649 250 760 PFOS 2200 1670 1850 1570 1540 2100 1890 1630 1750 2130 I Imagery: ESRI Imagery Mapping Service | Legend 300 150 W /j |tip i?1 Sulfonate concentrations are the averages of primary and duplicate samples. File: Y :\3 M D e c\M X D \S u lfo n a te \2 0 1 3 \W W T P _ Ju n e 2 0 1 2 _ Ju n e 2 0 1 4 .m xd , 8/2 1 /2 0 14 7 :00:57 PM, ricksc 0 Feet N s Figure 3-8 Groundwater Average PFBS, PFHS and PFOS Concentrations Wastewater T reatment Plant Area Extraction Wells June 2012 - June 2014 D ecatur, A L W e ll ID M W -47 PFBS 0M 74 PFHS 0.113 PFOS 0 .1 6 6 W e ll ID MW -121 PFBS < 0 .0 2 5 0 PFHS < 0 .0 2 5 0 PFOS 0 .0 3 0 7 W e ll ID 607R 607L PFBS 0.187 0.180 PFHS 0 .1 9 2 0 .2 2 0 PFOS 0 .2 7 4 0 .3 2 2 W ell ID 611R 611L PFBS 0.295 0.261 PFHS 0.128 0.140 PFOS 0 .6 5 0 0 .4 5 8 . E ff W ell ID 605R 605L ltA' ;r t * r*-&, PFBS 0.134 0 .0 9 8 8 PFHS 0 .1 1 5 0 .2 0 3 iS?' .Ai PFOS 0 .0 5 3 2 0.213 W e ll ID 602S 602L PFBS 0 .2 8 8 0 .0 6 9 9 PFHS 0.182 0.252 PFOS 0.468 0.544 W e ll ID 603S 603L PFBS 0 .1 7 7 0.0946 PFHS 0.119 0.108 PFOS 6.417 0.0905 W ell ID M W -13S M W -13I M W -13B PFBS 0.0831 0 .0 6 8 2 0 .0 8 0 3 W ell ID 604R 604S 604L PFHS 0.0404 0.0457 0.0521 PFOS < 0 .0 2 3 2 < 0 .0 2 3 2 0.0376 W ell ID 609R 609L PFBS 0.310 0.340 0.449 PFBS 0.433 0.348 PFHS 0 .1 8 4 0 .2 2 9 0 .2 2 7 PFHS 0.0947 0.169 PFOS 1.12 0.478 0.811 PFOS 0.162 0.569 W ell ID 610S 610L PFBS 0 .0 5 4 3 0.131 PFHS 0 .0 7 5 6 0.136 PFOS 0 .2 7 5 0 .6 4 6 Legend Monitoring Well Locations Facility Boundary Note: Average sulfonate concentrations based on primary and duplicate results in ng/mL (ppb). 0 2,000 4,000 Feet ---------------- 1 File: Y:\3MDec\MXD\Sulfonate\2013\oflsite_phase2_3_Mar_April2012.mxd, 12/9/2013 8:33:56 AM, ricksc Imagery: ESRI Bing Mapping Service F ig u re 3-9 O ff-S ite P h a se 2 an d P h a se 3 M o n ito rin g W e lls G ro u n d w a te r A ve ra g e P FB S , P F H S an d P F O S C o n c e n tra tio n s M a rch - A p ril 2 0 1 2 D ecatur, A L It M Well ID MW1S MW1I MW1B PFBS PFHS Nov-10 1.77 2.23 0.493 0.966 2.26 3.28 PFOS 6.42 1.47 7.40 Well ID MW2I MW2B ./ PFBS PFHS Nov-10 2.06 1.38 1.24 1.38 PFOS 5.20 14.8 Well ID MW4S MW4I MW4B PFBS PFHS Nov-10 <0.0250 <0.0250 <0.0250 <0.0250 <0.0250 <0.0250 'J PFOS 0.256 0.144 0.0475 W e l ID MW3S MW3I MW3B PFBS PFHS Nov-10 <0.0250 <0.0250 0.0279 0.0324 0.0381 0.0326 PFOS 0.0306 0.262 0.283 Well ID MW-13S MW-13I MW-13B MW-13S MW-13I MW-13B PFBS PFHS Nov-10 0.0957 0.0559 0.0843 0.0526 0.0987 0.0717 Apr-12 0.0831 0.0404 0.0682 0.0457 0.0803 0.0521 PFOS <0.0250 <0.0250 <0.0250 <0.0232 <0.0232 0.0376 -Q Note: Average sulfonate concentrations based on primary and duplicate results in ng/mL (ppb). 1 Legend Monitoring Well Locations 0________________ 525______________ 1050 Feet | _ _ | Approximate Parcel Boundary Well Designations S = Shallow (residuum) I = Intermediate (epikarst) B = Bedrock File: Y:\3MDec\MXD\Sulfonate\2013\Morgan_landfill_PFOA.mxd, 9/15/2014 1:44:14 PM, ricksc Imagery: ESRI Bing Mapping Service F ig u re 3-10 M o rg a n C o u n ty L a n d fill G ro u n d w a te r M o n ito rin g W e lls A vera ge PFBS, PFH S and PFO S C o n ce n tra tio n s N o v e m b e r 2 0 1 0 an d A p ril 20 1 2 D ecatur, A L PFBS <0.0250 317L PFHS 0.0877 PFOS 0.230 PFBS 2120 PFBS 397 330R PFHS 185 330L PFHS 359 PFOS 462 PFOS 146 335R PFBS PFHS PFOS 864 1600 3600 - M a nr RW312R lF ~ 1 a PFBS 740 PFHS 494 PFOS 992 Chemical Plant o PFBS 986 310R PFHS 328 PFOS 671 Tennessee River/ Wheeler Reservoir PFBS 997 RW331S PFHS 473 PFOS 850 PFBS 82.1 324L PFHS 88.4 PFOS 194 PFBS 62.1 RW327R PFHS 146 PFOS 345 PFBS 31.0 PFBS 47.9 328R PFHS 57.0 328L PFHS 18.7 PFOS 144 PFOS 1.14 WW8RWW9R- Avenue A PFBS 30.8 \0 203L PFHS 202 PFOS 666 PFBS 14.8 PFBS 220 PFBS 64.5 222R PFHS 407 PFOS 351 PFBS 2300 GRSO4 PFHS 8280 PFOS NR 227R PFHS 86.3 227L PFHS 40.1 PFOS 616 PFOS 220 PFBS 6.90 PFBS 8.52 220R PFHS 29.8 220L PFHS 41.4 PFOS 33.0 PFOS 49.5 Notes: -Average sulfonate concentrations based on primary and duplicate results in ng/mL (ppb). -GRS04 is a composite sample from multiple extraction wells. Legend: < G ro u n d w a ter sam p lin g locatio n s R - R esid u u m W ell S - E p ik arst W ell L - B ed ro c k W ell 450 225 0 Feet ^ _____ i N File: Y:\3MDec\MXD\Sulfonate\2013\Chemicalplant_closedlandfill_April2012.mxd, 10/9/2013 3:58:14 PM, ricksc S Figure 3-11 Groundwater Average PFBS, PFHS and PFOS Concentrations Chemical Plant and Closed Landfill Area April 2012 Decatur, AL Well ID 131R 131S 131L PFBS 40.2 0.860 3.13 PFHS 234 4.75 20.6 PFOS 1120 5.80 27.3 Well ID 130R 130S 130L PFBS 14.6 3.54 1.53 PFHS 119 31.0 12.7 PFOS 405 81.0 50.7 Well ID 133R 133S 133L PFBS 3.04 8.57 5.87 PFHS 19.6 61.6 39.1 PFOS 21.2 160 70.1 Well ID 140R PFBS 1.59 PFHS 17.7 PFOS 106 ell ID PFBS 141R 7.0369 PFHS 0.303 PFOS 5.59 Well ID 138R 138S 138L PFBS NS[D] 5.38 <0.0250 Well ID 136R 136S 136L PFBS NS[D] 2.58 2.32 PFHS NS[D] 17.7 16.0 Well ID 134R PFBS 55.9 134S 0.428 134L PFOS NS[D] 9.80 ---------- 1--- 66.1 60.9 PFHS 556 4.77 103 PFOS 1030 13.7 328 PFHS NS[D] 26.4 PFOS NS[D] 200 0.396 Well ID 144S PFBS 1.99 &145R PFHS 9.03 PFOS 13.4 Well ID 135R 135S 135L PFBS 67.3 2.17 10.9 PFHS 765 21.2 79.4 PFOS 974 13.5 59.0 Well ID 143R PFBS 1.56 PFHS 5.69 PFOS 13.7 Well ID 142R PFBS 2.08 PFHS 11.2 PFOS 55 .4 Well ID 137R 137S 137L PFBS NS[D] 0.109 0.0679 gFHS gs[D] 0.0922 0.0876 PFOS NS[D] 0.355 1.27 Notes: -Average sulfonate concentration is the average of primary and duplicate sample analytical results in ng/mL (ppb). Legend: Groundwater Note: Sampling Location R - Residuum Well S - Epikarst Well j___ j Daikin Property L - Bedrock Well 800 400 0 Feet File: Y:\3MDec\MXD\Sulfonate\2013\Former_Slugde_gw_Mar_April2012.mxd, 12/9/2013 2:02:15 PM, ricksc F ig u re 3-12 F o rm e r S lu d g e In co rp o ra tio n A re a G ro u n d w a te r A vera ge P FB S , P F H S and P F O S R e su lts M a rch - A p ril 2 0 1 2 D ecatur, A L / a I' File: Y:\3MDec\MXD\Sulfonate\2013\Regional_GW_residuum.mxd, 12/9/2013 8:41:05 AM, ricksc m Legend < Monitoring Well Groundwater Elevation Contour (feet above mean sea level) Line of Groundwater Gradient Convergence ==n=m(Approximate) Groundwater Flow Direction N otes: G ro u n d w a ter levels reco rd e d in la te M a rc h /e a rly A p ril 20 1 2 . O ff-S ite w ell locatio n s are approxim ate. Im ag ery : E S R I B in g M ap p in g S ervice # 0 1,000 2,000 Feet Figure 3-13 Residuum Groundwater Elevation Contour Map 3M Decatur, AL Facility File: Y:\3MDec\MXD\Sulfonate\2013\Regional_GW_bedrock.mxd, 12/9/2013 8:43:14 AM, ricksc A 1.-1 s Legend < Monitoring Well Groundwater Elevation Contour (feet above mean sea level) Line of Groundwater zicznc Gradient Convergence (Approximate) Groundwater Flow Direction N otes: G ro u n d w a ter levels reco rd e d in la te M a rc h /e a rly A p ril 20 1 2 . O ff-S ite w ell locatio n s are approxim ate. Im ag ery : E S R I B in g M ap p in g S ervice # 0 1,000 2,000 Feet Figure 3-14 Bedrock Groundwater Elevation Contour Map 3M Decatur, AL Facility '.if* >.V^ r J W * T \1 J. (I FI orris Fami Landfill > z--~> n H 'i r i*m . j i !k U w ^ y S 3k & [\ jB 5^d# Browns Ferry Road Site ) 1 ^ If m %"> i*R . ( ft organ ounty Landfill Ks 77/ . \ i? 1' '* w w u r9*^ - m i rr -; *X * * * * ^ T O ^ j L wf'Wif/ ' l> f V '/ ' O * _7_ - ^ - * _1_____ r li aM Legend: 3M D ecatu r F acility B o u n d ary 9,700 4,850 0 Feet L andfill File: Y:\3MDec\MXD\Sulfonate\2013\Phase3_landfills.mxd, 12/9/2013 8:44:43 AM, ricksc Imagery: ESRI Bing Mapping Service Figure 3-15 Regional Disposal Facility Map D ecatur, A L W ell ID MW10 MW10D PFBS 0.0426 < 0.0250 PFHS 0.121 0.0281 PFOS 0.242 < 0.0300 Well ID MW01 MW01D PFBS < 0.0250 0.194 PFHS < 0.0250 0.0533 PFOS < 0.0300 0.353 Well ID MW02 MW02D PFBS 0.194 0.142 PFHS 0.467 0.424 PFOS 1.42 1.10 Well ID MW05 MW05D Well ID MW13 MW13D PFBS 4.13 5.03 PFHS 1.27 1.48 PFBS 1.05 0.0280 PFHS 1.35 0.0323 PFOS 2.08 < 0.0300 Well ID MW03 MW03D PFOS 8.28 8.68 PFBS PFHS PFOS < 0.0250 0.0667 0.209 < 0.0250 < 0.0250 < 0.0300 Well ID MW04 MW04D PFBS 1.67 0.171 PFHS 12.8 0.342 PFOS 22.5 0.184 Imagery: ESRI Bing Mapping Service Legend < Monitoring Well Locations (Clusters) 750 Feet | _ _ | Approximate Parcel Boundary Average sulfonate concentrations are the average o f primary and duplicate sample analytical results in ng/mL (ppb). M W -xx = Shallow (residuum) monitoring well ________ M W -xxD = Deep (bedrock) monitoring well File: Y:\3MDec\MXD\Sulfonate\2S13\BFI_Morris_Farm_landfill.mxd, 8/27/2014 5:36:51 PM, ricksc w| f | E S F ig u re 3-16 BFI M o rris F a rm s L a n d fill G ro u n d w a te r A vera ge PFBS, PFH S and PFO S C o n ce n tra tio n s M arch 2011 D ecatur, A L W e ll ID MW 4R MW 4L . PFBS 0 .6 4 8 0 .0 9 3 5 ' PFHS 1 6 .5 0 .2 5 4 PFOS 2 3 .4 0 .5 4 0 f& W e ll ID MW 7R PFBS 0 .5 1 5 PFHS 1 .7 7 PFOS 25.1 W e ll ID MW 10R PFBS 0 .0 6 7 5 PFHS 0 .3 0 0 PFOS 0 .5 6 5 Well ID PFBS PFHS MW11L <0.0250 0.0777 PFOS 0.383 W e ll ID MW 3R PFBS 3.91 PFHS 1 9 .6 -,P F O S 2 3 .2 IW e ll ID MW 5R MW 5L PFBS 0 .0 6 0 5 0 .1 6 8 PFHS 0 .1 3 8 0 .2 7 3 PFOS 0 .0 8 9 1 .2 7 ' V1 \ W e ll ID MW 6R MW 6L PFBS 0 .2 5 0 .0 5 5 1 / PFHS 0 .6 7 7 0 .0 8 5 5 PFOS 7 .6 8 0 .3 4 2 B W e ll ID MW 1R PFBS 0 .1 0 9 PFHS 0 .8 7 2 PFOS 1 .6 9 W e ll ID MW 8R PFBS 0 .0 5 8 3 PFHS 0 .1 1 9 PFOS 0 .2 5 9 W e ll ID MW 9R MW 9L PFBS < 0 .0 2 5 0 < 0 .0 2 5 0 PFHS 0 .0 5 4 5 < 0 .0 2 5 0 PFOS < 0 .0 2 3 2 0 .0 4 4 5 v< ________ Note: Sulfonate concentrations are the averages of primary and I duplicate sample analytical results in ng/mL (ppb). V; .. y ^ t V ** Imagery Source: ESRI, Bing Mapping Service Legend | I Property Line | ____j Area of Suspected Waste Disposal Existing Monitoring Wells New Monitoring Wells A \ Surface Water Samplng Locations W File: Y:\3MDec\MXD\Sulfonate\2013\Browns_Ferry_Road_Site_GW_August2013.mxd, 10/17/2013 9:23:52 AM, johna F ig u re 3-1 7 B ro w n s F e rry R o a d S ite G ro u n d w a te r A vera ge P FB S , P F H S and P F O S C o n ce n tra tio n s August 2013 D ecatur, A L jjjif T~r~tr r* 3M Decatur Lower Reach MSF01 MSF16 MSF17 MSF28 (MSF17D) MSF24 MSF24D (AXYS) MSF25 MSF26 MSF29 (MSF26D) PFOS (ng/g) 4770 1520 165 180 437 537 306 2090 2050 LOC001 LOC002 Middle Reach Middle Reach MSF02 MSF07 MSF08 MSF09 MSF27 (MSF09D) MSF10 MSF11 MSF11D (AXYS) MSF11D (AXYS Dup) MSF12 MSF13 MSF14 MSF15 PFOS (ng/g) 4240 2920 1360 2020 2120 1840 2940 3720 3510 526 950 3370 754 Upper Reach MSF03 MSF04 MSF05 MSF05D (AXYS) MSF06 MSF18 MSF19 MSF20 MSF21 MSF22 MSF23 PFOS (ng/g) 70.7 576 471 656 156 701 675 1180 671 4660 52.5 LOC003 File: Y:\3MDec\MXD\Largemouth_Bass_PFOS_April2012_v2.mxd, 8/21/2014 6:22:11 PM, ricksc Legend: Fish S a m p lin g L o ca tio n S urfa ce W a te r S a m p lin g L o c a tio n s Note: PFOS concentrations are the average of primary and duplicate sample analytical results on a wet weight basis. Im agery Source: ESRI B ing M apping S ervice 2013 w 0 500 1,000 Feet Figure 3-18 Fish Filet Tissue Average PFOS Concentrations Bakers Creek and Tennessee River April 2012 3M Decatur, A L F a cility 3M Decatur |S a m p le ID |l OC001 P F O S (ng/m L) 0 .4 5 0 S a m p le ID |l O c 0q2 P F O S (ng/m L) 0 .6 9 1 S a m p le ID 1L O C 0 0 3 P F O S (ng/m L) 0 .0 2 3 7 Middle Reach File: Y:\3MDec\MXD\Surface_Water_PFOS_April2012_v2.mxd, 8/21/2014 6:24:51 PM, ricksc Fish Sampling Location S urfa ce W a te r S a m p lin g L o c a tio n s Note: PFOS concentrations are the average of primary and duplicate sample analytical results. Im agery Source: ESRI B ing M apping S ervice 2013 w 0 500 1,000 Feet Figure 3-19 Surface W ater Average PFOS Concentrations Bakers Creek and Tennessee River April 2012 3M Decatur, A L Facility Reach 15 - PFBS Bass < 0 .2 5 2 0 .2 8 9 < 0.252 (<0.797) < 0 .2 5 2 < 0 .2 5 2 C atfish < 0.252 (0.327) 0 .8 5 4 0 .3 5 3 < 0 .2 5 2 0 .7 3 9 Shoal Creek R each 12 PFBS Bass C atfish < 1 .1 0 <1.10 (<0.966) < 1 .1 0 < 1 .1 0 0 .1 8 4 < 0 .5 0 3 0 .2 9 4 < 0 .5 0 3 0.176 0.859 0 .5 0 6 Joe W heeler Dam Reach 1 - PFBS Bass C atfish 0.131 (0 .138 ) < 1 .1 0 < 0.252 3 .8 2 < 0.252 0 .3 0 5 < 0.503 0 .4 0 5 < 0.503 < 0.503 (<0.943) Elk R iver Reach 10 - PFBS Bass C atfish 0.590 (<0.939) < 1 .1 0 0 .4 5 9 < 1 .1 0 0 .2 1 9 1 .8 6 0.582 (0.996) 0.371 0 .2 5 9 <0.503 (<1.01) Reach 08 - PFBS Bass C atfish < 0.252 (<0.252) < 0 .2 5 2 Reach 14 - PFBS Bass C atfish < 0 .2 5 2 0 .3 2 7 0.269 (< 0.252) < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 <0.252 (<0.962) < 0 .2 5 2 < 0 .2 5 2 <0.252 (<0.990) < 0 .2 5 2 < 0 .2 5 2 0 .3 3 7 1 .5 4 < 0 .2 5 2 I Big Nance Creek Reach 06 - PFBS Reach 1 3 - PFBS Bass C atfish Bass C atfish < 0 .2 5 2 < 0.252 < 1 .1 0 2 .6 7 < 0 .2 5 2 < 0.252 NR < 1 .1 0 < 1 .1 0 < 1 .1 0 < 0 .2 5 2 < 0.252 (<0.252) 0 .3 2 2 < 0 .2 5 2 Spring Creek Mallard Creek Round Island Creek Swan Creek <0.252 (<0.962) < 0 .5 0 3 < 0 .5 0 3 < 0.252 < 0.252 < 0.252 - Ir E V- R e a ch 0i9 - P F B S Bass C atfish < 1 .1 0 < 1 .1 0 <1.10 (<1.10) <1.10 (<1.10) <1.10 (<0.990) 0 .8 8 7 < 0 .2 5 2 0 .4 6 0 < 0 .2 5 2 1.31 Reach 07 - PFBS Bass C atfish 0 .4 4 4 < 0.252 < 0 .2 5 2 <0.252 (<0.905) Fox Creek Reach 03 - PFBS Bass C atfish <0.252 (<0.990) < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 <0.252 (<0.252) < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0.252 < 0.252 (<0.252) < 0 .2 5 2 < 0.503 < 0.503 Reach 05 - PFBS . Bakers Creek Betty Rye & Dry Branch Bass C atfish < 0 .5 0 3 <0.503 (<0.503) 2.21 (2 .04) < 0 .5 0 3 < 0 .5 0 3 < 0 .5 0 3 Flint C reek < 0 .5 0 3 < 0 .2 5 2 < 0 .5 0 3 < 0 .5 0 3 Reach 04 - PFBS Bass C atfish < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 <0.252 (<0.252) <0.252 (<0.948) < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 Reach 02 - PFBS Bass C atfish < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0.252 (<0.976) < 0.252 (<0.252) <0 252 <0 252 R e a c h 01 - P F B S Bass C atfish < 0 .2 5 2 < 0.252 (<0.980) < 0.252 (<0.252) < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 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 Imagery: ESRI Bing Mapping Service N 012 4 I Miles Figure 3-20 Fish Filet Tissue Average PFBS Concentrations Tennessee River October/November 2012 3M Decatur, A L F acility Shoal Creek Reach 15 - 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 12 - 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 11 - 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) Joe W heeler Dam . Elk R iver Reach 14 - 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 I Big Nance Creek Reach 13 - 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 fL Spring Creek Mallard Creek Reach 09 - 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 H Reach 07 - 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 n -tr ilt Reach 10 - 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) Round Island Creek . Bakers Creek Reach 08 - 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 Swan Creek Reach 06 - 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 03 - 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 05 - 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 04 - 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 Flint C reek Reach 02 - 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 01 - PFHS 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 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 Imagery: ESRI Bing Mapping Service N 012 4 I Miles Figure 3-21 Fish Filet Tissue Average PFHS Concentrations Tennessee River October/November 2012 3M Decatur, A L F acility Shoal Creek R each 15 - PFOS Bass C atfish 6 4 .7 7.33 (7 .56) 7 5 .5 6 .6 7 103 (99.8) 1 0 .5 8 6 .9 9 .6 0 9 4 .6 5 .6 3 R each 12 - PFO S Bass C atfish 6 5 .8 11.7 (1 0 .2 ) 9 8 .2 5 .1 0 5 4 .9 1 1 .2 6 6 .4 4 .8 7 65.3 (65.9) 1 0 .7 Joe W heeler Dam . R e a c h 11 - P F O S Bass C atfish 21 0(22 4) 8 .4 9 116 18.3 225 15.7 115 22.2 145 11.9 (1 2 .3 ) Elk R iver R each 14 - PFO S Bass C atfish 54.1 1 4 .3 88.9 (81.6) 5 .5 9 93.5 (91.7) 8.01 5 4 .8 6 .6 8 7 5 .3 1 1 .0 ' " A- I Big Nance Creek R each 13 - PFO S Bass C atfish 7 1 .0 1 0 .3 9 8 .5 8 .5 7 6 8 .9 11.8 (1 2 .7 ) 67.1 1 0 .5 7 9 .6 7 .6 9 Svi Spring Creek Mallard Creek l S " t,, ' L V- : f R each 10 - PFOS Bass C atfish 65.2 (56.1) 8 .8 6 190 13.4 207 8 .1 2 101.9 (106) 1 4 .4 104 16.3 (1 4 .5 ) Reach 08 - PFOS Bass C atfish 134 (143) 2 2 .6 4 5 .0 3 .9 8 7 6 .9 4.89 (4.12) 175 1.90 8 0 .3 8 .5 5 # K9& " . i** - * Round Island Creek Swan Creek R e a c h 0(3 - P F O S Bass C atfish 6 9 .0 4 .3 7 4 6 .9 4 .3 7 40.8 (43.9) 2 .2 2 5 0 .6 4 .1 5 120 3.41 W 'l 'X* Reach 09 - PFOS Bass C atfish 259 12.1 167 (168) 14.3 (1 4.6) 173 (186) 4 5 .5 279 1 8 .6 281 21.9 Reach 07 - PFOS Bass C atfish 408 26.9 262 69 .6 (57.8) 250 64.2 33 3(32 4) 1 1 .7 178 29.2 Reach 05 - PFOS Bass C atfish 435 85.6 (7 9.3) 373 (345) 8 3 .4 9 6 .4 283 599 542 521 286 Fox Creek . Bakers Creek Betty Rye & Dry Branch Reach 04 - PFOS Bass C atfish 104 4.69 159 50.9 (4 2.0) 434 (432) 2 .4 2 124 7.85 218 2 9 .1 Flint C reek Reach 02 - PFOS Bass C atfish 4 4 .1 2 .9 2 3 2 .6 3.41 4 9 .5 1 .7 8 49.0 (56.6) 1.30 (1 .2 4 ) 4 0 .8 2 .6 5 Reach 03 - PFOS Bass C atfish 21 .8 (22.0) 0 .8 9 7 2 5 .7 2.01 3 1 .2 0 .9 6 1 23 .9 (19.9) 4 .4 5 7 3 .2 2.11 R e a ch 01 - P F O S Bass C atfish 35.8 (36.3) 1.81 (1 .6 6 ) 3 2 .7 0 .7 6 8 2 7 .9 1 .5 0 1 8 .6 5 .1 7 3 7 .8 0 .8 3 6 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 Imagery: ESRI Bing Mapping Service N 012 4 I Miles Figure 3-22 Fish Filet Tissue Average PFOS Concentrations Tennessee River October/November 2012 3M Decatur, A L F acility Location R15L1 R15L1 (DUP) R15L2 R15L3 PFBS 0.0148 0.0137 0.0132 0.0141 PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 PFOS 0.0199 0.0189 0.0184 0.0181 Shoal Creek Location R12L1 R12L2 R12L3 PFBS PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 PFOS 0.0124 0.0138 0.0133 Joe W heeler Dam \ Legend Facility Boundary | _ _ | Fish Sampling Area Elk River Location R14L1 R14L2 R14L3 PFBS 0.00761 0.00769 0.00847 PFHS < 0.00500 < 0.00500 < 0.00500 PFOS 0.0187 0.0190 0.0230 Big Nance Creek Location R13L1 R13L2 R13L3 PFBS 0.0100 0.0120 0.00983 PFHS < 0.00500 < 0.00500 < 0.00500 PFOS 0.0248 0.0277 0.0238 Spring Creek - Location R11L1 R11L2 R11L3 PFBS 0.0521 0.0511 0.0289 PFHS 0.0179 0.0189 0.0113 PFOS 0.0878 0.0910 0.0695 Mallard Creek Location R9L1 R9L2 R9L3 PFBS 0.0641 0.0846 0.0594 PFHS 0.0197 0.0262 0.0196 PFOS 0.103 0.125 0.0910 Fox Creek Location R7L1 R7L2 R7L3 PFBS 0.0464 0.0638 0.00965 PFHS 0.0164 0.0195 < 0.00500 PFOS 0.0842 0.102 0.0348 Location R10L1 R10L2 R10L3 R10L3 PFBS PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 PFOS 0.00682 0.00699 0.00649 0.00663 Location R8L1 R8L2 R8L3 PFBS PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 PFOS 0.00642 0.00657 0.00767 Round Island Creek Swan Creek Location R6L1 R6L2 R6L3 PFBS PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 PFOS 0.00684 0.00672 0.00677 Bakers Creek Betty Rye Dry Branch Location R3L1 R3L2 R3L3 PFBS PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 PFOS 0.00703 0.00734 0.00639 Location R5L1 R5L1 (DUP) R5L2 R5L3 PFBS 0.124 PFHS 0.0398 0.116 0.0423 < 0.00500 < 0.00500 < 0.00500 < 0.00500 PFOS 0.385 0.405 0.0177 0.00984 Location R4L1 R4L2 R4L3 PFBS PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 0.0104 0.0110 PFOS 0.0144 0.0180 0.0705 Location R2L1 R2L2 R2L3 R2L3 (DUP) Flint Creek Location R1L1 R1L2 R1L3 PFBS PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 PFOS 0.00691 0.00762 0.00669 PFBS PFHS < 0.00500 < 0.00500 < 0.00500 0.00703 < 0.00500 < 0.00500 < 0.00500 < 0.00500 PFOS 0.00932 0.00906 0.00894 0.00846 File: Y:\3MDec\MXD\Sulfonate\2013\Fish_Reach_samp_areas_Nov2012.mxd, 12/9/2013 8:59:12 AM, ricksc 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) Imagery: ESRI Bing Mapping Service N W^ E s 0 12 4 Miles Figure 3-23 Surface W ater - Fish Reaches Average PFBS, PFHS and PFOS Concentrations Tennessee River November 2012 3M Decatur, A L F acility Shoal Creek T9 ,, J f Location T910 T909 T909 (DUP) T908 T907 T906 T905 T904 T903 T902 T901 PFBS 0.0134 0.0128 0.0140 0.0134 0.0127 0.0139 0.0147 0.0137 0.0142 0.0112 0.0177 PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 PFOS 0.0190 0.0192 0.0194 0.0203 0.0214 0.0197 0.0244 0.0207 0.0201 0.0205 0.0203 Big Nance Creek A . .W p V' w , Location T810 T809 T808 T808 (DUP) T807 T806 T805 T804 T803 T802 T801 PFBS 0.0111 0.00928 0.0112 0.0109 0.0115 0.0121 0.0129 0.0143 0.0132 0.0125 0.0130 PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 PFOS 0.0123 0.0115 0.0133 0.0143 0.0141 0.0121 0.0154 0.0166 0.0159 0.0154 0.0152 Joe W heeler Dam \ Elk R iver Location T710 T709 T708 T707 T707 (DUP) T706 T705 T704 T703 T702 T701 PFBS 0.0177 0.0106 0.0140 0.0190 0.0210 0.0269 0.0362 0.0325 0.0556 0.0651 0.0710 PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 0.00517 < 0.00500 0.00769 0.00837 0.00807 PFOS 0.0176 0.0134 0.0165 0.0202 0.0193 0.0242 0.0312 0.0316 0.0468 0.0466 0.0426 T8 Spring Creek Mallard Creek T7 Fox Creek Location PFBS PFHS T610 < 0.00500 < 0.00500 T609 < 0.00500 < 0.00500 T608 < 0.00500 < 0.00500 T607 < 0.00500 < 0.00500 T606 < 0.00500 < 0.00500 T606 (DUP) < 0.00500 < 0.00500 T605 0.0124 < 0.00500 T604 0.0237 < 0.00500 T603 0.0570 0.00919 T602 0.124 0.0180 T601 0.0896 0.0242 PFOS 0.00783 0.00766 0.00692 0.00649 0.00972 0.0111 0.0145 0.0238 0.0566 0.107 0.0864 Location T510 T509 T508 T507 T506 T505 T505 (DUP) T504 T503 T502 T501 PFBS PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 0.0638 0.00835 0.115 0.0126 0.105 0.0143 PFOS 0.00857 0.00815 0.00820 0.0081 0.00682 0.00720 0.00678 0.00789 0.0492 0.0765 0.0728 , Round Island Creek Location T310 T309 T308 T307 T306 T305 T304 T303 T303 (DUP) T302 T301 PFBS PFHS < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 PFOS 0.00732 0.00658 0.00698 0.00657 0.00611 0.00730 0.00768 0.00694 0.00751 0.00746 0.0190 T6 T5 Swan Creek T4 T3 Location PFBS PFHS T110 < 0.00500 < 0.00500 T109 < 0.00500 < 0.00500 T108 < 0.00500 0.00938 T107 < 0.00500 < 0.00500 T106 < 0.00500 < 0.00500 T105 < 0.00500 < 0.00500 T104 < 0.00500 < 0.00500 T103 < 0.00500 < 0.00500 T102 < 0.00500 < 0.00500 T101 < 0.00500 < 0.00500 T101 (DUP) < 0.00500 < 0.00500 PFOS 0.00670 0.00645 0.00660 0.00638 0.00643 0.00663 0.00689 0.00680 0.00615 0.00613 0.00636 Bakers Creek HP. 'JB Betty Rye Dry Branch >| Location PFBS PFHS T410 < 0.00500 < 0.00500 T409 < 0.00500 < 0.00500 T408 < 0.00500 < 0.00500 T407 < 0.00500 < 0.00500 T406 < 0.00500 < 0.00500 T405 < 0.00500 < 0.00500 T404 < 0.00500 < 0.00500 T404 (DUP) < 0.00500 < 0.00500 T403 < 0.00500 < 0.00500 T402 < 0.00500 < 0.00500 T401 0.285 0.0174 PFOS 0.00778 0.00673 0.00704 0.00731 0.00742 0.00821 0.00729 0.00846 0.00752 0.00869 0.138 *4 iS T2 Flint Creek Location PFBS PFHS PFOS L r T210 < 0.00500 < 0.00500 0.00777 T209 < 0.00500 < 0.00500 0.00698 r - 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 k T204 < 0.00500 < 0.00500 0.00623 T203 < 0.00500 < 0.00500 0.00650 B T202 < 0.00500 < 0.00500 0.00993 T202 (DUP) < 0.00500 < 0.00500 0.00943 T201 < 0.00500 < 0.00500 0.00835 * Legend Facility Boundary Surface Water . Transect Location A Transect Locations Transect 1 Note: - Average sulfonate is the average of primary and duplicate sample analytical results in parts per billion (ppb) - Sample node numbers are in numerical order across transects from south (Location 01) to north (Location 10) - T110 = Transect 1 Location 10 - Significant digits determined by analytical data package (data reported in ng/L, ppt) Imagery: ESRI Bing Mapping Service I Miles Figure 3-24 Surface W ater - T ransects 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 3M Decatur, A L F acility PFBS 15.0 SW01 PFHS 120 SFOS 248 PFBS 9.57 SW03 PFHS 72.2 PFOS 197 PFBS 7.68 ~ ' f. > r : SW02 PFHS 52.0 PFOS 213 *9mctr`a1 PFBS 21.1 GP02 PFHS 11.2 PFOS 17.5 PSBS 40.7 SW08 PFHS 166 PFOS 266 rh r < 1 -Pr~4 k / j iJ L . ' / & nmm l , r * anw . L rA. ________________________ ( PFBS 5.02 PFHS 7.63 PFOS 26.2 PFBS 13.7 SW04 PFHS 86.5 PFOS 192 SW12 ^ ---P-F-B-S- PFHS PFOS 0.764 3.68 104 PFBS 66.4 GP03 PFHS 413 PFOS 373 PFBS 20.9 SW05 PFHS 102 PFOS 392 PFB0 19.1 PFBS 10.8 GP04 PFHS 85.8 SW07 PFHS 47.9 PFOS 152 PFOS 129 PFBS 10.6 PFHS 30.5 PFOS 119 Legend O Permanent MonitoringWell O Soil Sampling Locations(GPxx) * SurfaceWater Sampling Locations(SWXx) TM" AvenueADitchandTributaries Note: Average sulfonate concentrations based on primary and duplicate results in ng/mL (ppb) 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, A EX, GeoEye, Getmapping, Aerogrid, IGP. 2010 Figure 3-25 Avenue A Surface Water and Groundwater Average PFBS, PFHS and PFOS Concentrations June - July 2010 ________________ D e c a tu r, A L ________________ 1 ; , y . ^ SD02 Depth PFBS 0 - 0.5 6.03 0.5 - 1.0 1.21 _______ H_____ PFHS 64.5 12.7 1 PFOS 6770 1070 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 \ *? * * 1 2.11 fsT SD01 3.11 29.0 ______________ Depth PFBS PFHS PFOS 0 - 0.5 0.5 - 1.0 0.611 0.605 2.78 1.72 4 L * * M ttsssr 225 129 Depth 0 - 0.5 0.5 - 1.0 2.0 - 2.5 6.0 - 6.5 PFBS 28.4 46.5 99.8 76.6 PFHS 141 229 162 126 PFOS 734 581 297 139 iQ3 SD11 Depth PFBS PFHS PFOS 0 - 0.5 8.42 156 1560 0.5 - 1.0 >* f. 4.10 57.9 Ml 786 SS07 Depth PFBS PFHS PFOS 0 - 0.5 11.6 59.6 747 0.5 - 1.0 9.20 66.3 3140 in , * ' JJ.* Depth 0 - 0.5 0.5 - 1.0 PFBS 3.57 6.29 23.8 5.68 7.68 PFHS 20.9 45.0 30.7 33.2 55.0 PFOS 157 123 242 290 579 Depth 0 - 0.5 0 - 0.5 (DUP) 0.5 - 1.0 SD12 PFBS 16.9 17.3 5.31 PFHS 289 293 77.0 PFOS 3210 3270 451 Depth 0 - 0.5 0.5 - 1.0 Depth 0 - 0.5 0.5 - 1.0 SD13 PFBS PFHS 10.4 123 12.6 138 SD15 -- PFBS PFHS 52.3 399 17.3 146 PFOS 1250 1480 ------------ > PFOS 14600 13200 Depth 0 - 0.5 0.5 - 1.0 PFBS 129 100 PFHS 1450 1460 PFOS 9130 5370 Depth PFBS mo o o 27.2 0 - 0.5 (DUP) 1 33.6 m o 22.6 PFHS 764 830 569 PFOS 7060 8590 3120 Depth 0 - 0.5 0.5 - 1.0 SD17 PFBS 28.2 24.8 PFHS 1080 853 PFOS 10700 7120 III MU Depth 0 - 0.5 0.5 - 1.0 SD09 PFBS 27.5 14.0 PFHS 135 101 PFOS 1300 1250 Depth 0 - 0.5 0.5 - 1.0 2.0 - 2.5 2.0 - 2.5 (DUP) 12.0 - 12.5 PFBS 1.37 0.701 0.345 0.392 2.59 PFHS 0.175 < 0.200 0.113 < 0.200 1.58 ir PFOS 66.3 76.7 195 173 5.48 - }fl Depth 0 - 0.5 0.5 - 1.0 PFBS 7.31 3.41 PFHS 48.1 19.0 PFOS 897 559 Depth 0 - 0.5 0.5 - 1.0 0.5 - 1.0 (DUP) 2.0 - 2.5 5.0 - 5.5 PFBS 17.8 4.71 5.73 1.37 3.83 PFHS 244 43.1 64.6 5.23 6.26 Depth 0 - 0.5 0.5 - 1.0 2.0 - 2.5 2.0 - 2.5 (DUP) 5.0 - 5.5 PFBS 5.71 32.6 40.1 49.0 12.8 Depth 0 - 0.5 0 - 0.5 (DUP) 0.5 - 1.0 PFBS 5.28 4.80 1.62 PFHS 42.9 46.0 9.03 Jvd o sPFOS 521 1 540 93.2 PFOS 3630 1630 2280 331 64.3 PFHS 41.8 252 321 417 82.2 700 2070 1450 1240 352 `WS.t.V S. .wW.r'f. V te aufcSt p t* > r - 1iI Depth 0 - 0.5 SS06 PFBS 1.27 0.433 PFHS 2.61 0.975 1.17 PFOS 331 132 164 o m o Depth 0 - 0.5 0.5 - 1.0 SD10 PFBS 171 66.5 PFHS 1030 459 PFOS 4570 7830 '( ,I ' TT" 'n Depth 0 - 0.5 0.5 - 1.0 SS09 PFBS 1.53 1.44 PFHS 7.02 4.53 PFOS Depth 0 - 0.5 0 - 0.5 (DUP) 1.0 _ PFBS 1.67 1.42 21 Depth 0 - 0.5 0.5 - 1.0 2.0 - 2.5 17.0 - 17.5 PFBS 0.607 0.521 1.88 2.01 PFHS 4.77 2.75 6.81 9.74 PFOS 666 407 460 59.1 1) File: Y:\3MDec\MXD\Sulfonate\2013\AvenueA_soil_sed.mxd, 12/9/2013 9:01:46 AM, ricksc Depth 0 - 0.5 0.5 - 1.0 SD04 PFBS 24.9 8.93 PFHS 178 79.0 PFOS 2120 1910 Depth 0 - 0.5 0.5 - 1.0 SD05 PFBS 4.72 4.35 PFHS 34.5 26.0 PFOS 525 310 fn1 o Depth 0.5 - 1.0 2.0 - 2.5 I 5.0 - 5.5 Depth 0 - 0.5 0.5 - 1.0 o GP04 PFBS 4.51 2.16 1.72 2.78 PFHS 3.32 1.55 4.83 12.8 SD06 PF0S 6.24 3.37 PFHS 39.6 18.9 PFOS 840 513 99.2 33.2 PFOS 617 338 Depth 0 - 0.5 0.5 - 1.0 ___ SD07 PFBS 8.75 9.48 PFHS 51.8 60.9 PFOS 1660 2430 Depth GP05 PFBS PFHS mo o o 12.3 8.82 m o 5.29 12.7 2.0 - 2.5 1.75 7.95 5.5 - 6.0 5.11 48.6 L SS01 Depth PFBS PFHS PFOS o 0.909 4.73 750 0.452 5.06 919 PFOS 346 381 429 1080 o m o m oo o Depth 0.5 - 1.0 2.0 - 2.5 11.0 - 11.5 GP06 PFBS 086 0.801 0.180 0.858 PFHS 4.09 2.79 1.46 1.86 PFOS 209 447 136 41.4 Depth 0 - 0.5 0.5 - 1.0 SS02 PFBS 0.786 4.11 PFHS 7.26 54.6 PFOS 405 168 Legend * Sediment Sampling Locations O Soil Sampling Locations Avenue A Ditch and Tributaries ote: Average sulfonate concentrations based on primary and duplicate results in ng/g (ppb) on a dry weight basis. Imagery Source: ESRI, i-cubed, USDA FSA, USGS, AEX, GeoEye, Getmapping, Aerogrid, IGP. 2010 Depth 0 - 0.5 0.5 - 1.0 SS05 PFBS 22.5 6.71 PFHS 288 67.6 PFOS 10600 4040 Depth 0 - 0.5 0.5 - 1.0 2.0 - 2.5 13.0 - 13.5 _____ GP07 PFBS 1.69 0.991 1.22 12.7 PFHS 17.7 34.7 25.3 146 PFOS 599 3680 1870 14000 Depth 0 - 0.5 0.5 - 1.0 0.5 - 1.0 (DUP) 2.0 - 2.5 5.0 - 5.5 PFBS NR 0.320 0.397 0.231 0.693 PFHS NR 11.3 13.7 7.32 10.7 r ! .* V* f -> PFOS 5160 770 1010 322 337 m o o Depth 10.5 - 1.0 (DUP) mo o PFBS 4.09 5.27 3.92 PFHS 212 118 109 PFOS NR 2110 2880 Depth 0 - 0.5 0.5 - 1.0 SS04 PFBS 2.61 0.966 PFHS 5.59 2.03 PFOS 506 179 N W^ E 0 250 500 ^ 3 Feet Figure 3-26 Avenue A Soil and Sediment Average PFBS, PFHS and PFOS Concentrations June - July 2010 3M Decatur, A L F a cility im n r-fif -M*--'MulKt, SW*| PFBS 3 .3 9 PFHS 1.84 PFOS 8 .6 2 Avenue A Ditch 4 3 .2 210R PFHS 309 PFOS 539 PFBS 19.2 SS24 PFHS 143 PFOS 500 I I ote - verage sulfonate concentrations are the average o f primary and duplicate sample analytical results in ng/mL (ppb). Legend Soil Sampling/Groundwater ^ Sampling Locations < Monitoring Well Location -- -- Avenue A Ditch and Tributaries 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, A EX, GeoEye, Getmapping, Aerogrid, IGP. 2010 Figure 3-27 Additional Avenue A Groundwater Average PFBS, PFHS and PFOS Concentrations January 2011 _______ Decatur, AL_______ ,-lii * 'S L l Depth 0 - 0.5 0.5 - 1 1.5 - 2 M # Depth 0 - 0.5 0.5 - 1 1.5 - 2 Depth 0 - 0.5 0.5 - 1 SD19 PFBS 12.9 14.0 8.50 PFHS 119 127 75.7 PFOS 873 1080 345 SS21 PFBS 0.823 0.367 1.95 t PFHS 14.0 13.4 13.0 PFOS 1130 325 121 J SD18 PFBS PFHS 9.70 107 7.57 78.6 5.77 47.8 _LiI I f T M f f l PFOS j : c"l 1000 545 SS11 NR Depth PFBS PFHS 0 - 0.5 0.696 0.918 0.5 - 1 0.627 4.30 1.5 - 2 < 0.500 0.515 ' * XHv" Oisrsn Elf: Depth 0 - 0.5 0.5 - 1 0.5 - 1 (DUP) 1.5 - 2 SS10 PFBS 5.28 1.25 1.18 3.58 PFHS 29.1 7.81 6.77 19.8 PFOS 3730 453 365 471 Depth 0 - 0.5 0.5 - 1 1.5 - 2 SS14 PFBS 0.494 < 0.500 < 0.500 PFHS 4.18 3.12 2.93 PFOS 57.4 98.9 NR St' -'**-*:r' \ m n -X, PFOS 324 271 223 SS17 Depth PFBS PFHS 0-0.5 0.228 2.13 0.5 - 1 0.226 3.06 1.5 - 2 0.886 . 1.97 PFOS 61.2 220 221 'U.t,', P .W ma MltT.. Depth 0 - 0.5 0.5 - 1 1.5 - 2 PFBS 0.283 0.154 0.269 * ** c - PFHS 3.49 1.26 3.85 PFOS 272 170 109 Depth 0 - 0.5 0.5 - 1 0.5 - 1 (DUP) 1.5 - 2 PFBS 1.39 1.41 1.45 0.523 PFHS 4.40 2.47 2.29 0.864 PFOS 273 157 151 27.3 r-- . - Depth 0 - 0.5 0.5 - 1 1.5 - 2 Depth 0 - 0.5 0.5 - 1 1.5 - 2 Depth - 0 - 0.5 0.5 - 1 0.5 - 1 (DUP) 1.5 - 2 Depth 0 - 0.5 0.5 - 1 1.5 - 2 SS27 PFBS PFHS PFOS 0.744 0.341 145 0.652 0.471 241 0.412 0.415 162 SD20 " ---- -----------------1 PFBS PFHS PFOS 10.3 160 2800 10.8 139 1300 9.68 121 672 SS2 PFBS PFHS 0.837 0.888 0.633 0.879 0.604 0.804 2.29 4.31 SD23 PFBS PFHS 4.97 44.6 2.42 22.5 2.08 16.1 PFOS 163 197 196 174 PFOS 518 270 176 Depth 0 - 0.5 0.5 - 1 1.5 - 2 Depth 0 - 0.5 0.5 - 1 1.5 - 2 SS29 PFBS 1.67 0.760 6.30 PFHS 9.64 3.64 43.3 SS24 PFBS 6.14 8.80 PFHS 61.3 61.0 3.17 34.2 PFOS 605 271 1070 SFOS 1320 974 1600 -r1 .y. i-\ ^ 7- 1 It' Depth 0 - 0.5 0.5 - 1 1.5 - 2 PFBS 19.7 33.8 35.0 PFHS 607 516 295 PFOS 3320 2520 2020 Depth 0 - 0.5 0.5 - 1 1.5 - 2 SS30 PFBS PFHS 0.548 3.83 < 0.500 0.869 1.22 Ad 8.06 SD21 Depth PFBS 0 - 0.5 7.86 0.5 - 1 10.4 1.5 - 2 5.46 PFOS 437 130 309 PFHS 107 148 57.7 PFOS 2020 1650 562 Depth 0 - 0.5 0.5 - 1 0.5 - 1 (DUP) 1.5 - 2 SD22 PFBS 13.9 7.70 6.49 8.19 PFHS 193 68.3 69.1 62.8 File: Y:\3MDec\MXD\Sulfonate\2013\AvenueA soil sed Jan2011.mxd, 8/21/2014 1:48:19 PM, ricksc PFOS 4060 887 1120 473 !L f A ^i h y '-V - v.>- ; ' >n v ' & . ^ Jr *'4 * * ' ? v Depth 0-0.5 0 - 0.5 (DUP) 0.5 - 1 1.5 - 2 Depth PFBS 0 - 0.5 1.17 0.5 - 1 4.89 1.5 - 2 10.7 1 v ------------- -- PFHS 13.7 186 294 SS26 PFBS PFHS 0.552 8.26 0.666 9.95 1.03 17.7 2.87 62.4 L _ ______ PFOS 970 NR 1140 1040 PFOS 2110 5830 2520 Ji V Depth 0 - 0.5 0.5 - 1 0.5 - 1 (DUP) 1.5 - 2 SS13 PFBS 1.01 0.988 0.906 1.48 PFHS 1.93 2.17 2.23 1.93 PFOS 123 559 552 357 Al : Depth 0 - 0.5 0 - 0.5 (DUP) 0.5 - 1 1.5 - 2 SS16 PFBS 7.24 7.54 2.39 7.00 PFHS 6.74 6.48 2.61 5.48 PFOS 312 300 303 165 Depth 0 - 0.5 0.5 - 1 1.5 - 2 SS18 PFBS 0.814 < 0.500 0.246 PFHS 2.33 0.597 1.63 PFOS 78.9 30.8 156 U Depth 0-0.5 0.5 - 1 1.5 - 2 Depth 0 - 0.5 0 - 0.5 (DUP) 0.5 - 1 1.5 - 2 SS20 PFBS 0.309 0.247 0.299 0.483 v; PFHS 2.68 2.27 1.70 PFOS 102 107 29.4 2.38 206 % SS19 PFBS 0.224 1.30 1.84 PFHS 2.22 14.6 23.6 PFOS NR 397 294 v> . r Notes: - Average PFBS, PFHS and PFOS is the average o f prim ary and d uplicate sam ple analytical results on a dry/weight basis - NR = Result not reported because LMS recovery result w as outside of 100 + 50% reporting limits. - Dup = Duplicate sample. Legend A S e d im e n t S am p lin g Lo cations Soil S a m p lin g Lo ca tio n s Soil S a m p lin g /G ro u n d w a te r S am pling Lo cations ote: Average sulfonate concentrations based on primary and duplicate results in ng/g (ppb) on a dry weight basis. Imagery Source: ESRI, i-cubed, USDA FSA, USGS, AEX, GeoEye, Getmapping, Aerogrid, IGP. 2010 N W^ E 0 250 500 ^ 3 Feet Figure 3-28 Avenue A Soil and Sediment Average PFBS, PFHS and PFOS Concentrations January 2011 3M Decatur, A L F a cility F603 0 - 0.5 ft 5 - 5.5 ft PF S 0.423 2.43 PF S NR 6.58 PF S 112 3.86 ------- : DF602 0 - 0.5 ft 5 - 5.5 ft 0.373 64.8 PFHS 3.56 270 PFOS 1730 Field 6 DF601 0 - 0.5 ft 5 - 5.5 ft NR 1.67 PFHS 33.3 5.04 PFOS 3890 229 Legend < Soil Boring Location 3M Decatur Facility 200 100 0 Feet Note: -Average sulfonate concentrations are the averages of prim ary and duplicate sample analytical results in ng/g (ppb; dry w eight basis). File: Y:\3MDec\MXD\Sulfonate\2013\DF601_602_603_PFBS_PFHS.mxd, 8/21/2014 1:52:05 PM, ricksc Imagery: ESRI Bing Mapping Service F ig u re 3-29 A re a A d ja c e n t to F ie ld 6 S oil P F B S , P F H S a n d P F O S C o n c e n tra tio n s Decem ber 2012 Decatur, AL 71 S V fs fi, ' ta ' : > v " - v Date Feb. 2012 Oct. 2012 Aug. 2013 DC01 PFBS PFHS NS NS 0.115 0.232 NS NS Feb. 2012 Oct. 2012 Aug. 2013 NS <0.0250 NS NS 0.0733 NS NS <0.0250 PFOS NS 1.54 NS Dry Creek Date Feb. 2012 Oct. 2012 Aug. 2013 ET05 PFBS PFHS NS NS <0.0250 0.0748 NS NS PFOS NS 0.155 NS i m i r*> a V f f 'J ` Note: PFBS, PFHS and PFOS concentrations are the averages of primary and duplicate sample ana lytica l results in ng/m L (p p b) in surface w a te r a nd ng/g (p p b ) dry w e ig h t in sedim ent. : Date Feb. 2012 Oct. 2012 Aug. 2013 >1 __________ !_________ Mallard Creek Date Feb. 2012 Oct. 2012 Aug. 2013 ET03 PFBS PFHS PFOS <0.0250 <0.0250 0.303 <0.0250 <0.0250 0.230 0.0563 0.0806 0.278 .' ET02 Date PFBS PFHS Feb. 2012 <0.0250 <0.0250 Oct. 2012 <0.0250 <0.0250 Aug. 2013 0.0350 <0.0250 ET04 PFBS PFHS PFOS <0.0250 <0.0250 4.30 0.0513 0.0364 0.200 0.0362 <0.0250 0.109 1 -1 * Western Tributary [ PFOS 0.0627 <0.0250 0.0546 Date Feb. 2012 Oct. 2012 Aug. 2013 ET01 PFBS PFHS 0.0354 <0.0250 NS NS NS NS PFOS 0.0302 NS NS Legend Property Line Drainage Features 0 Surface Water Samplng Locations N S Not Sampled File: Y :\3 M D e c\M X D \S u lfo n a te \2 0 1 3 \B ro w n s Ferry R oad Site Feb2012 A ug 2 01 3.m xd . 9/1 2 /2 0 14 10:16:58 AM , ricksc ^w e iM W cseea 'M o u th Eastern Tributary Im agery Source: ESRI, Bing M apping Service __________________________________ F ig u re 3-30 B ro w n s F e rry R o a d S ite S urfa ce W a te r A v e ra g e P FB S , P F H S and P F O S C o n ce n tra tio n s February 2012 - A ugu st 2013 Decatur, AL INotes: PFBS, PFHS and PFOS concentrations are the averages of primary and duplicate sample ana lytica l results in ng/m L (ppb). D uplicate sa m p le results pro vide d in parentheses Legend Property Line Drainage Features 0 Surface Water Samplng Locations N S Not Sampled File: Y :\3 M D e c\M X D \S u lfo n a te \2 0 1 3 \B ro w n s Ferry Road Site S e d im e n t Q ct20 12 .m xd . 8/2 1 /2 0 14 1:55:01 PM, ricksc 1,300 2,600 ^w e F ig u re 3-31 B ro w n s F e rry R o a d S ite S e d im e n t P F B S , P F H S an d P F O S C o n ce n tra tio n s February 2012 Decatur, AL SECTION 3 TABLES J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 Table 3-1 On-Site FSIA PFBS, PFHS and PFOS Surface Soil Concentrations March 2010 3M Decatur, AL Facility Sample ID SS06 SS07 SS08 SS09 SS10 SS01 SS02 SS03 SS04 SS05 SS05 SS06 SS07 Sample Depth (ft bgs) 0.0 - 0.5 1.0 - 1.5 0.0 - 0.5 1.0 - 1.5 0.0 - 0.5 1.0 - 1.5 0.0 - 0.5 1.0 - 1.5 0.0 - 0.5 1.0 - 1.5 0.0 - 0.5 1.0 - 1.5 0.0 - 0.5 1.0 - 1.5 0.0 - 0.5 1.0 - 1.5 0.0 - 0.5 1.0 - 1.5 0.0 - 0.5 1.0 - 1.5 0.0 - 0.5 1.0 - 1.5 0.0 - 0.5 1.0 - 1.5 0.0 - 0.5 1.0 - 1.5 Average PFBS Average PFHS (ng/g; ppb) (ng/g; ppb) Field 5 0.187 ND (ND) 0.161 ND (ND) ND 0.357 ND 0.467 ND 0.156 ND ND ND 0.283 ND 0.164 ND 2.16 ND 1.27 Field 8C 0.156 0.681 0.222 1.39 ND 0.563 ND 0.345 2.17 11.2 1.33 (1.38) 10.4 (10.5) ND 0.290 ND 0.333 0.198 1.48 6.62 27.1 Field 11 0.919 0.227 (0.185) 10.0 3.21 (2.98) 0.326 4.62 0.139 2.01 4.26 86.8 ND 1.95 Average PFOS (ng/g; ppb) 35.8 48.4 (42.1) 49.4 4.74 101 59.8 410 88.4 1080 237 159 356 121 91.8 874 1550 (1530) 242 302 276 508 1500 1140 (1360) 1050 659 18900 4960 Notes: Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results on a dry weight basis. 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 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-1_SS_March_April_10_(FSIA).xls Page 1 I 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 WESA1 WESA2 WESA3 WESB1 WESB2 WESB3 WESB4 WESB4 DUP WESB5 WESC1 WESC2 WESC3 WESC4 WESD1 WESD2 WESD2 DUP WESD3 WEU01 WEU02 WEU03 WEU04 WEU05 WEU06 WEU07 WEU08 WEU09 WEU09 DUP WEU10 Average PFBS (ng/g; ppb) 0.471 0.569 0.471 0.480 0.391 0.391 0.374 0.400 0.509 ND 0.294 0.239 0.233 0.174 0.379 0.365 0.639 0.928 ND 0.858 0.789 1.30 0.249 0.690 1.26 0.740 0.787 0.379 Average PFHS (ng/g; ppb) 3.99 3.50 3.53 2.34 3.24 2.96 3.21 3.11 5.30 3.62 3.32 3.29 1.81 0.932 1.92 1.88 4.01 1.62 0.587 2.34 1.82 4.62 1.52 3.04 1.77 1.45 1.56 0.400 Average PFOS (ng/g; ppb) 605 537 535 189 377 391 502 471 61 6 682 573 774 292 131 336 363 584 126 116 223 248 775 543 479 128 198 203 57.0 Notes: A vera ge PFBS, PFH S, and PFO S is the a ve rage o f prim ary and duplicate sam ple an alytical results on a dry w e ig h t basis. N D = N ot D ecte cted < 0 .2 0 0 ng/g D U P = D uplica te sam ple. S a m p lin g L o ca tio n N otes: W E S A - W e tla n d s E dge S e d im e n t T ra n se ct A W E S B - W e tla n d s E dge S e d im e n t T ra n se ct B W E S C - W e tla n d s E dge S edim e nt T ra n se ct C W E S D - W e tla n d s E dge S edim e nt T ra n se ct D W E U - W e tla n d s E dge U pland S a m p lin g Lo cation 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 Average Average Average Sample Depths PFBS PFHS PFOS (ft bgs) (ng/g; ppb) (ng/g; ppb) (ng/g; ppb) MW-47 MW-121 607R 609R 610S 611R DAL SS BPMW47 0 0000 July 2011 DAL SS BPMW121 0 0000 July 2011 DAL SS 607R 0 0000 October 2010 DAL SS 607R 0 0010 October 2010 DAL SS 607R DB 0010 October 2010 DAL SS 607R 0 0040 October 2010 DAL SS 607R 0 0270 October 2010 DAL SS 609R 0 0000 October 2010 DAL SS 609R 0 0010 October 2010 DAL SS 609R 0 0040 October 2010 DAL SS 609R 0 0110 October 2010 DAL SB 610S 0 0000 August 2011 DAL SB 610S 0 0010 August 2011 DAL SB 610S 0 0040 August 2011 DAL SB 610S 0 0150 August 2011 DAL SS 611R 0 0000 October 2010 DAL SS 611R 0 0010 October 2010 DAL SS 611R 0 0040 October 2010 DAL SS 611R 0 0050 October 2010 -iP^ -iP^ -iP^ -iP^ tn tn tn tn 0 - 0.5 0 - 0.5 0- 1 1-2 1-2 27 - 28 0-1 1-2 11 - 12 0-1 1-2 15 - 17 0-1 1-2 5-6 0.239 0.343 0.480 < 0.500 < 0.500 < 0.500 < 0.500 0.517 < 0.500 < 0.500 < 0.500 0.991 0.439 0.572 < 0.200 0.417 0.548 < 0.500 < 0.500 < 0.200 < 0.200 < 0.200 < 0.200 < 0.200 < 0.200 < 0.200 0.195 < 0.200 < 0.200 < 0.200 0.586 0.690 1.11 < 0.200 < 0.200 0.658 < 0.200 < 0.200 10.2 10.1 14.7 20.0 23.0 4.61 < 0.200 24.0 9.08 1.07 < 0.200 36.1 19.5 3.00 < 0.200 21.8 14.6 4.67 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. J:\3M-DECAT\2013 Sulfonates Report\Flnal (September 2014)\Tables\ Table_3-3_Offsite_Phase3_SS_PFBS PFHS PFOS.xlsx Page 1 of 1 Well 220R 220L 226R 226L 310R 317L 320L 327R 130R 130S 130L 131R 131S 131L 132R 132S 132L 133R 133S 133L 134R 134S 134L 135R 135S 135L 136R 136S 136L 137R 137S 137L 138R 138S 138L Notes: Table 3-4 On-Site Groundwater Monitoring W ells 3M Decatur, A L Facility Type Location Installation Date Phase 1 On-Site Groundwater Monitoring Wells Residuum Closed Landfill July 2001 Bedrock Closed Landfill August 2001 Residuum Closed Landfill July 2002 Bedrock Closed Landfill August 2002 Residuum Bedrock Bedrock Residuum Chemical Plant Chemical Plant Closed Landfill Chemical Plant Existing (pre-1994) Existing (pre-1994) Existing (pre-1994) August 2001 Phase 2 On-Site Groundwater Monitoring Wells Residuum FSIA Field 9 Epikarst FSIA Field 9 Bedrock FSIA Field 9 December 2004 November 2004 November 2004 Residuum FSIA Field 9 December 2004 Epikarst FSIA Field 9 December 2004 Bedrock FSIA Field 9 November 2004 Residuum FSIA Field 6 December 2004 Epikarst Bedrock Residuum Epikarst Bedrock Residuum Epikarst Bedrock FSIA Field 6 FSIA Field 6 FSIA Field 6 FSIA Field 6 FSIA Field 6 FSIA Field 8b FSIA Field 8b FSIA Field 8b November 2004 November 2004 December 2004 December 2004 December 2004 December 2004 November 2004 November 2004 Residuum FSIA Field 8b December 2004 Epikarst FSIA Field 8b December 2004 Bedrock FSIA Field 8b December 2004 Residuum FSIA Field 14 December 2004 Epikarst FSIA Field 14 November 2004 Bedrock Residuum Epikarst Bedrock FSIA Field 14 FSIA Field 14 FSIA Field 14 FSIA Field 14 November 2004 December 2004 November 2004 November 2004 Residuum FSIA Field 11 March 2006 Epikarst FSIA Field 11 March 2006 Bedrock FSIA Field 11 March 2006 FSIA = Former Sludge Incorporation Area The 138 series groundwater monitoring wells were installed on-site adjacent to the eastern property boundary to provide data on groundwater flowing off-site in an easterly direction. J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-4_Decatur Wells.xlsx Page 1 of 1 Table 3-5 On-Site Chemical Plant and Closed Landfill Wells PFBS Analytical Results 2010 - 2013 3M Decatur, AL Facility Well ID 203L 220R 220L 222R 227R 227L 310R 317L 324L 328R 328L 330R 330L 335R RW312R RW327R RW331S GRS04 1Q10 March 29 - April 8, 2010 61.9 7.46 11.1 129 23.8 342 386 0.534 95.7 36.0 76.8 4470 504 NS 1220 75.8 349 1930 3Q10 September 20 - 30, 2010 70.6 10.0 7.85 126 16.7 376 451 0.324 89.3 31.8 63.1 2780 636 NS 1420 126 925 2410 1Q11 March 21 - 28, 2011 105 8.41 11.5 97.6 19.6 292 840 0.0246 112 39.0 71.9 3020 545 1080 1190 93.3 558 2020 Average PFBS (n g/mL; ppb) 3Q11 1Q12 September 19 - 26, 2011 March 14 - 28, 2012 23.2 30.8 4.76 6.90 7.87 8.52 62.5 64.5 13.4 14.8 256 220 730 986 <0.0400 70.0 27.9 <0.0250 82.1 31.0 40.3 3070 530 47.9 2120 397 1080 1140 864 740 51.6 62.1 525 997 1690 2300 3Q12 September 12 - 20, 2012 40.2 6.77 7.79 33.6 14.2 296 1010 <0.0400 73.0 32.6 41.6 1910 388 1280 699 65.7 1290 2240 1Q13 March 21-28, 2013 35.6 7.01 7.94 42.3 16.8 201 1190 < 0.0400 71.7 32.3 45.1 1600 547 1380 1120 64.5 842 2060 3Q13 September 27 - October 11, 2013 23.7 8.12 4.96 45.5 15.1 259 1310 <0.0250 72.2 33.2 45.3 1440 1340 1240 7260 61.9 430 2780 Notes: On-site chemical plant and closed landfill wells are sampled during the first and third quarter groundwater sampling events. Average PFBS is the average of primary and duplicate sample analytical results. GRS04 is a composite sample from multiple extraction wells. 335R inadvertently identified as 335S on chain of custody in March 2011. NS - Not Sampled Well ID suffixes: R = residuum S = epikarst L = bedrock ng/mg = nanograms per milligram ppb = parts per billion J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-5_Onsite_GW_PFBS(1Q-3Q).xlsx Page 1 of 1 Table 3-6 On-Site Chemical Plant and Closed Landfill Wells PFHS Analytical Results 2010-2013 3M Decatur, AL Facility Well ID 203L 220R 220L 222R 227R 227L 310R 317L 324L 328R 328L 330R 330L 335R RW312R RW327R RW331S GRS04 1Q10 March 29 - April 8, 2010 360 32.0 53.0 845 169 63.7 424 0.691 101 67.7 25.9 258 403 NS 946 154 426 6190 3Q10 September 20 - 30, 2010 481 48.7 41.9 872 97.5 255 453 0.237 110 68.0 23.6 330 476 NS 842 229 611 7630 1Q11 March 21 - 28, 2011 595 34.3 52.0 607 106 62.2 485 0.119 111 63.1 22.3 259 625 2030 629 168 292 5360 Average PFHS (ng/mL; ppb) 3Q11 1Q12 September 19 - 26, March 14 - 28, 2011 2012 142 202 17.9 29.8 37.6 41.4 429 407 61.7 86.3 68.5 40.1 320 328 0.0984 82.5 57.9 0.0877 88.4 57.0 18.4 18.7 196 185 434 359 1420 831 1600 494 126 146 331 473 6060 8280 3Q12 1Q13 September 12 - 20, 2012 March 21-28, 2013 257 237 28.7 31.3 39.8 36.9 223 252 47.3 71 150 37.2 324 284 0.0472 63.0 54.9 0.0864 72.3 50.5 18.3 16.8 197 152 300 294 1580 461 1570 488 156 140 409 295 8410 6820 3Q13 September 27 - October 11, 2013 147 40.3 17.3 308 57.1 82.5 307 0.0986 54.3 51.7 16.9 163 459 1660 1300 164 161 9340 Notes: On-site chemical plant and closed landfill wells are sampled during the first and third quarter groundwater sampling events. Average PFHS is the average of primary and duplicate sample analytical results. GRS04 is a composite sample from multiple extraction wells. 335R inadvertently identified as 335S on chain of custody in March 2011. NS - Not Sampled Well ID suffixes: R = residuum S = epikarst L = bedrock ng/mL = nanograms per milliliter ppb = parts per billion J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-6_Onsite_GW_PFHS(1Q-3Q).xlsx Page 1 of 1 Table 3-7 On-Site Chemical Plant and Closed Landfill Wells PFOS Analytical Results 2010-2013 3M Decatur, AL Facility Well ID 203L 220R 220L 222R 227R 227L 310R 317L 324L 328R 328L 330R 330L 335R RW312R RW327R RW331S GRS04 1Q10 March 29 - April 8, 2010 852 46.0 63.6 974 956 287 760 2.44 203 146 14.5 759 145 NS 1750 639 922 1400 3Q10 September 20 - 30, 2010 836 70.2 64.6 1230 852 5060 895 <0.500 257 168 0.686 802 172 NS 1510 675 1180 1370 1Q11 March 21 - 28, 2011 861 51.5 83.5 781 740 363 1020 0.250 316 217 1.33 720 223 6010 1010 617 642 NR Average PFOS (ng/mL; ppb) 3Q11 1Q12 September 19 - 26, 2011 March 14 - 28, 2012 478 27.4 666 33.0 49.2 49.5 511 351 578 616 474 220 611 671 0.205 211 178 0.230 194 144 1.29 1.14 593 462 169 146 3350 1440 3600 992 397 345 506 850 1330 NR 3Q12 September 12 - 20, 2012 630 50.4 66.5 403 485 1840 644 0.0534 102 147 0.819 604 190 4560 928 467 816 2100 1Q13 March 21-28, 2013 778 60.9 65.2 414 576 241 644 0.181 208 180 6.1 523 182 4890 774 346 642 3090 3Q13 September 27 - October 11, 2013 791 78.9 49.5 459 657 832 767 0.243 77.9 270 1.24 682 179 6480 2860 663 461 2820 Notes: On-site chemical plant and closed landfill wells are sampled during the first and third quarter groundwater sampling events. Average PFOS is the average of primary and duplicate sample analytical results. GRS04 is a composite sample from multiple extraction wells. 335R inadvertently identified as 335S on chain of custody in March 2011. NS = Not Sampled NR - Not reported due to quality control issues Well ID suffixes: R = residuum S = epikarst L = bedrock ng/g = nanograms per gram ppb = parts per billion J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-7_Onsite_GW_PFOS(1Q-3Q).xlsx Page 1 of 1 Table 3-8 On-Site FSIA Monitoring Wells PFBS Analytical Results 2010 - 2014 3M Decatur, AL Facility Average PFBS (ng/mL; ppb) Well ID 2Q10 4Q10 2Q11 4Q11 June 21 - July 2, 2010 November 11 - 17, 2010 June 22 - 30, 2011 December 8 - 14, 2011 1Q12 March 27 - April 3, 2012 4Q12 November 30 - December 5, 2012 130R 16.6 16.6 16.3 15.1 14.6 14.2 130S 3.57 3.50 3.53 3.27 3.54 3.09 130L 1.53 1.77 1.67 1.49 1.53 1.37 131R 75.1 81.2 54.9 36.6 40.2 36.7 131S 1.06 0.785 0.894 0.688 0.860 0.821 131L 2.94 3.35 3.42 2.86 3.13 2.68 132R 7.64 8.03 NS NS NS NS 132S 32.6 25.9 NS NS NS NS 132L 10.0 8.89 NS NS NS NS 133R 7.70 4.61 4.79 2.94 3.04 3.01 133S 12.7 14.0 9.08 11.3 8.57 11.3 133L 6.75 7.65 6.67 7.90 5.87 8.87 134R 59.1 56.2 51.4 47.5 55.9 38.4 134S 0.0938 0.143 0.258 0.364 0.428 0.409 134L 12.8 11.9 11.8 10.5 9.80 8.88 135R 83.0 81.0 74.3 64.4 67.3 68.7 135S 0.735 0.799 1.21 0.991 2.17 1.05 135L 6.36 5.73 9.69 7.09 10.9 7.04 136R NS[D] NS[D] NS[D] NS[D] NS[D] NS[D] 136S 3.49 2.55 3.69 1.77 2.58 2.53 136L 2.91 2.53 2.33 1.91 2.32 2.24 137R NS[D] NS[D] NS[D] NS[D] NS[D] NS[D] 137S 0.119 0.102 0.107 0.120 0.109 0.294 137L 0.0847 0.0823 0.0826 0.0868 0.0679 0.0764 138R NS[D] NS[D] 8.01 7.40 NS[D] NS[D] 138S 5.72 4.69 4.57 3.64 5.38 4.81 138L 140R 141R 0.0463 NC NC 0.0473 1.63 0.0431 0.0391 1.59 0.0431 <0.0250 1.27 0.0342 <0.0250 1.59 0.0369 <0.0250 1.45 0.0516 142R 143R 144S 145S CW26R* NC NC NC NC NS[NA] 1.68 NS[D] 1.95 NC 8.27 1.69 1.66 1.66 NC 8.23 1.77 0.715 2.02 NC NS[NA] 2.08 1.56 1.99 1.50 NS[NA] 1.63 NS NS 1.59 4.72 CW26L NS[NA] 12.9 13.5 NS[NA] NS[NA] 11.8 Notes: On-site FSIA landfill wells are sampled during the second and fourth quarter groundwater sampling events. Well ID suffixes: Average PFBS is the average of primary and duplicate sample analytical results. R = residuum *Some analytical reports designate CW26R as CW26C. S = epikarst Some analytical reports designate 144 and 145 incorrectly, wells were terminated in the epikarst and are S wells. L = bedrock NS - Not Sampled NS[D] - Not Sampled - Dry NS[NA] - Not Sampled - Not Accessible NC - Not Constructed 2Q13 June 21 - July 3, 2013 16.3 3.46 1.40 55.3 0.861 3.30 NS NS NS 2.62 9.26 13.1 49.7 0.390 9.85 60.8 1.72 15.0 NS[D] 2.69 2.27 NS[D] 0.111 0.0750 NS[D] 4.88 0.0481 NS[D] 0.0509 2.28 1.67 NS 1.98 7.50 12.6 4Q13 November 19 - November 21,2013 17.8 3.78 1.43 56.9 1.07 3.85 NS NS NS 2.85 9.94 8.48 44.8 0.658 10.3 72.1 2.33 16.3 NS[D] 2.97 2.52 NS[D] NS[D] 0.0912 NS[D] 5.55 <0.025 1.08 0.0611 2.31 NS[D] NS 2.28 8.44 14.4 1Q14 March 11 - March 13, 2014 16.8 4.32 1.58 68.2 0.996 2.98 NS NS NS 2.28 10.3 9.53 52.1 0.496 9.89 65.1 2.26 11.9 NS[D] 3.31 2.44 NS[D] 0.188 0.105 8.68 5.83 0.0324 1.47 0.0720 2.63 1.39 NS 0.811 7.64 15.8 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-8_Onsite_GW_PFBS(2Q-4Q-1Q).xlsx Page 1 of 1 Table 3-9 On-Site FSIA Monitoring Wells PFHS Analytical Results 2010 - 2014 3M Decatur, AL Facility Average PFHS (ng/mL; ppb) Well ID 130R 130S 130L 131R 131S 131L 132R 132S 132L 133R 133S 133L 134R 134S 134L 135R 135S 135L 136R 136S 136L 137R 137S 137L 138R 138S 138L 140R 141R 142R 143R 144S 145S CW26R* 2Q10 June 21 - July 2, 2010 119 12.1 13.0 345 5.49 19.3 36.0 211 78.2 45.6 77.1 39.4 441 1.33 106 754 5.88 37.9 NS[D] 19.3 11.7 NS[D] <0.103 <0.103 NS[D] 16.9 <0.103 NC NC NC NC NC NC NS[NA] 4Q10 November 11 - 17, 2010 128 31.3 14.4 413 4.63 20.7 52.8 205 77.2 31.1 91.5 53.4 503 1.71 112 839 6.25 35.9 NS[D] 16.5 16.2 NS[D] 0.0914 0.199 NS[D] 23.5 0.144 17.2 0.258 9.98 NS[D] 8.57 NC 63.1 2Q11 June 22 - 30, 2011 125 29.8 13.6 304 5.07 21.6 NS NS NS 33.1 67.2 46.9 483 3.09 111 844 8.06 71.0 NS[D] 25.8 16.0 NS[D] 0.0806 0.107 39.2 23.2 0.113 17.8 0.296 10.2 6.06 7.14 NC 67.8 4Q11 December 8 - 14, 2011 119 25.6 11.7 182 4.78 18.8 NS NS NS 20.9 79.7 58.7 561 4.22 109 827 7.90 47.6 NS[D] 11.4 12.3 NS[D] 0.113 0.0992 35.3 17.8 0.0594 14.1 0.254 9.97 2.33 7.54 NC NS[NA] 1Q12 March 27 - April 3, 2012 119 31.0 12.7 234 4.75 20.6 NS NS NS 19.6 61.6 39.1 556 4.77 103 765 21.2 79.4 NS[D] 17.7 16.0 NS[D] 0.0922 0.0876 NS[D] 26.4 0.0649 17.7 0.303 11.2 5.69 9.03 7.55 NS[NA] 4Q12 November 30 - December 5, 2012 109 27.4 10.1 210 4.68 18.2 NS NS NS 20.5 74.6 66.5 358 4.63 90.7 720 10.5 49.7 NS[D] 18.8 15.0 NS[D] 0.203 0.0918 NS[D] 22.4 0.0571 15.5 0.339 9.30 NS NS 7.43 50.1 CW26L NS[NA] 92.9 105 NS[NA] NS[NA] 95.5 Notes: On-site FSIA landfill wells are sampled during the second and fourth quarter groundwater sampling events. Well ID suffixes: Average PFHS is the average of primary and duplicate sample analytical results. R = residuum *Some analytical reports designate CW26R as CW26C. S = epikarst Some analytical reports designate 144 and 145 incorrectly, wells were terminated in the epikarst and are S wells. L = bedrock NS - Not Sampled NS[D] - Not Sampled - Dry NS[NA] - Not Sampled - Not Accessible NC - Not Constructed 2Q13 June 21 - July 3, 2013 132 31 11.7 324 5.23 22.3 NS NS NS 15.6 71.7 109 482 4.49 97.2 737 15.2 129 NS[D] 19.2 15.9 NS[D] 0.0924 0.0889 NS[D] 23.7 0.149 NS[D] 0.328 13.30 6.73 NS 9.55 60.7 98.2 4Q13 November 19 - November 21, 2013 132 33.1 11.2 315 5.95 24.9 NS NS NS 17.0 70.7 59.3 398 7.51 98.7 800 20.9 124 NS[D] 20.5 16.1 NS[D] NS[D] 0.105 NS[D] 24.9 0.0593 13.6 0.439 13.0 NS[D] NS 9.79 64.0 116 1Q14 March 11 - March 13, 2014 120 34.9 10.7 370 6.08 21.6 NS NS NS 15.5 73.4 72.7 520 6.10 92.7 734 26.1 78.5 NS[D] 20.2 16.5 NS[D] 0.265 0.114 37.7 26.3 0.0690 15.0 0.394 14.4 5.01 NS 3.99 57.9 122 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-9_Onsite_GW_PFHS(2Q-4Q-1Q).xlsx Page 1 of 1 Table 3-10 On-Site FSIA Monitoring Wells PFOS Analytical Results 2010 - 2014 3M Decatur, AL Facility Average PFOS (ng/mL; ppb) Well ID 2Q10 4Q10 2Q11 4Q11 1Q12 June 21 - July 2, 2010 November 11 - 17, 2010 June 22 - 30, 2011 December 8 - 14, 2011 March 27 - April 3, 2012 4Q12 November 30 - December 5, 2012 130R 532 583 450 467 405 541 130S 72.1 117 97.6 90.8 81 144 130L 74.4 82.7 63.7 66.3 50.7 70.9 131R 1720 1510 1510 1370 1120 1430 131S 8.25 5.55 5.37 4.56 5.8 7.48 131L 33.6 34.3 32.4 27.9 27.3 39.7 132R 263 295 NS NS NS NS 132S 861 633 NS NS NS NS 132L 240 293 NS NS NS NS 133R 77.5 60.8 42.6 39.1 21.2 44.2 133S 228 224 195 174 160 198 133L 144 204 146 252 70.1 443 134R 1180 1420 1060 1570 1030 943 134S 12.6 11.4 13.3 17.5 13.7 21.4 134L 491 579 493 436 328 484 135R 1040 892 969 1110 974 1100 135S 7.16 4.88 NR 5.81 13.5 8.06 135L 55.4 22.6 57.6 33.8 59.0 46.0 136R NS[D] NS[D] NS[D] NS[D] NS[D] NS[D] 136S 106 87.1 116 59.4 66.1 115 136L 89.7 79.2 69.0 64.4 60.9 92.2 137R NS[D] NS[D] NS[D] NS[D] NS[D] NS[D] 137S 137L 138R 0.427 0.734 NS[D] 0.315 0.893 NS[D] 0.483 1.96 347 0.517 1.62 300 0.355 1.27 NS[D] 1.01 1.41 NS[D] 138S 138L 140R 141R 142R 216 0.791 NC NC NC 245 0.581 136 4.23 108 199 0.851 128 3.00 85.5 160 0.420 102 4.87 94.4 200 0.396 106 5.59 55.4 231 0.380 150 6.08 105 143R 144S 145S CW26R* NC NC NC NS[NA] NS[D] NR NC 451 23.8 29.0 NC 398 15.6 26.7 NC NS[NA] 13.7 13.4 49.1 NS[NA] NS NS 118 384 CW26L NS[NA] 848 934 NS[NA] NS[NA] 910 Notes: On-site FSIA landfill wells are sampled during the second and fourth quarter groundwater sampling events. Well ID suffixes: Average PFOS is the average of primary and duplicate sample analytical results. R = residuum *Some analytical reports designate CW26R as CW26C. S = epikarst Some analytical reports designate 144 and 145 incorrectly; wells were terminated in the epikarst and are S wells. L = bedrock NS - Not Sampled NS[D] - Not Sampled - Dry NS[NA] - Not Sampled - Not Accessible NC - Not Constructed NR - Not reported due to quality control issues 2Q13 June 21 - July 3, 2013 562 143 70.4 1400 5.64 43.5 NS NS NS 29.0 307 738 1280 17.5 522 1150 11.8 152 NS[D] 120 93.9 NS[D] 0.527 1.19 NS[D] 237 0.663 NS[D] 5.27 166 25.2 NS 138 418 947 4Q13 November 19 - November 21, 2013 578 144 70.6 1260 6.83 46.4 NS NS NS 33.8 254 318 1260 28.5 507 1200 15.9 185 NS[D] 126 97.2 NS[D] NS[D] 1.74 NS[D] 251 0.445 119 7.17 165 NS[D] NS 179 455 1380 1Q14 March 11 - March 13, 2014 514 148 67.9 1150 6.83 45.7 NS NS NS 25.4 319 514 1450 23.9 501 1470 24.1 92.6 NS[D] 127 94.7 NS[D] 0.703 1.69 369 305 0.362 129 6.79 206 24.8 NS 91.0 436 1550 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-10_Onsite_GW_PFOS(2Q-4Q-1Q).xlsx Page 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 144PZE1 144PZE2 145S 145S 145S 145S DAL GW PZE1 120603 DAL GW PZE2 120603 DAL GW 144S 120604 DAL GW 144S 120605 DAL GW 144S 120606 DAL GW 144S 121204 Date Average PFBS Average PFHS (ng/mL; ppb) (ng/mL; ppb) June 3, 2012 June 3, 2012 June 4, 2012 June 5, 2012 June 6, 2012 December 4, 2012 2.76 3.62 1.90 1.28 1.23 1.59 13.1 17.0 8.22 5.79 5.69 7.43 Average PFOS (ng/mL; ppb) 150 179 63.9 55.1 57.6 118 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 DAL GW TW1R 120405 DAL GW TW2R 120405 DAL GW TW3R 120405 DAL GW TW4R 120405 DAL GW TW5R 120405 DAL GW TW6R 120405 Well ID TW1R TW2R TW3R TW4R TW5R TW6R Average PFBS (ng/mL; ppb) 33.8 117 304 184 522 156 Average PFHS (ng/mL; ppb) 57.3 579 1310 19.1 43.0 46.7 Average PFOS (ng/mL; ppb) 29.0 1090 3660 247 696 281 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 1 Table 3-13 On-Site Wastewater Treatment Plant Extraction Wells Groundwater PFBS, PFHS and PFOS Concentrations 2012-2014 3M Decatur, AL Facility Sample Pump Test (June 2012) 12/13/2012 1/17/2012 2/13/2013 3/27/2013 4/29/2013 5/31/2013 6/27/2013 7/23/2013 9/30/2013 10/28/2013 11/18/2013 12/13/2013 1/30/2014 2/27/2014 3/31/2014 4/23/2014 5/15/2014 6/25/2014 Average PFBS (ng/mL; ppb) WW8R WW9R WW10R WW11R 575 233 - - 489 248 453 254 441 321 410 184 354 236 - - 385 278 364 244 289 226 - - 282 225 - - 263 212 - - 303 249 247 299 312 286 264 240 362 305 303 287 316 259 239 198 326 317 250 168 331 270 260 262 357 341 278 254 283 257 243 212 290 266 220 237 285 274 240 250 Average PFHS (ng/mL; ppb) WW8R WW9R WW10R WW11R 2610 1290 - - 2280 2070 1740 1930 1900 1340 1330 1480 954 1400 - - 1760 1610 1330 1440 1200 1120 - - 1340 1140 - - 1260 1030 - - 1370 1220 1030 1000 1300 1280 1030 511 1440 1340 1120 680 1270 1170 885 512 1460 1460 757 362 1370 1370 935 696 1470 1550 1030 549 1180 1120 885 527 1160 1140 823 649 1240 1270 948 760 Average PFOS (ng/mL; ppb) WW8R WW9R WW10R WW11R 5280 2620 - - 4550 4170 4920 5710 4850 2610 2550 4080 3690 4100 - - 5120 4830 4180 4660 4340 4210 - - 4110 4150 - - 3910 3670 - - 4100 4200 2770 2200 4410 4380 3160 1670 4750 4540 3890 1850 4060 4190 2920 1570 3990 4800 1570 1540 4170 4660 2860 2100 5790 5420 3490 1890 3840 3820 2130 1630 4230 4790 2680 1750 4210 4470 2860 2130 Notes: A verage PFBS, PFHS and PFO S is the average o f prim ary and duplicate sam ple analytical results. J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-13_WWTP_Area_Extraction_Well_GW_PFBS PFHS PFOS.xls Page 1 o f 1 Table 3-14 Off-Site Monitoring Well Construction Data 3M Decatur, AL Facility W e ll ID M o nitored Z o ne W ell Location W e ll L o c a tio n in P ro xim ity to S ite P hase 2 O ff-S ite W e lls 601R 601S 601L 602R 602S 602L 603R 603S 603L 604R 604S 604L 605R 605L 138R 138S 138L R esiduum E pikarst B e d ro ck R esidu um E pikarst B edrock R esidu um E pikarst B e d ro ck R esiduum E pikarst B edrock R esidu um B e d ro ck R esidu um E pikarst B edrock BP P roperty BP P roperty BP P roperty BP P roperty BP P roperty BP P roperty G oss P roperty G oss P roperty G oss P roperty D avis P rop erty D avis P rop erty D avis P rop erty S olutia P rop erty S olutia P rop erty F S IA F ie ld 11 F S IA F ie ld 11 F S IA F ie ld 11 N orthw est N orthw est N orthw est W est W est W est S outhw est S outhw est S outhw est S outh S outh S outh East East East East East P hase 3 O ff-S ite W e lls M W -47 R esidu um M W -121 B edrock 607S E pikarst 607L B e d ro ck 609R R esiduum 609L B e d ro ck 610S E pikarst 610L B e d ro ck 611R R esiduum 611L B e d ro ck M W -13S R esiduum M W -13I M W -13B E pikarst B e d ro ck Notes: ft bgs = feet below ground surface BP P roperty BP P roperty Red Hat Road Red Hat Road S outh o f B akers C ree k S outh o f B akers C ree k A sce n d P roperty A sce n d P roperty East o f Bakers C reek East o f Bakers C reek M o rg a n C o u n ty La ndfill M o rg a n C o u n ty La ndfill M o rg a n C o u n ty La ndfill N orthw est N orthw est W est W est S outh S outh S outheast S outheast East East S outhw est S outhw est S outhw est ft toc = feet below top-of-casing SS = stainless steel OB = open borehole T otal D epth (ft bgs) W ell D iam e ter 49 8 0 .5 139 25 4 0 .5 153 3 7 .5 48 96 22 4 1 .5 55 19 160 20 33 78 5 4 .8 2 9 3 .6 6 4 4 .4 3 183 1 9 .2 9 5 6 .1 5 4 1 .0 5 5 .0 2 0 .4 6 4 .0 2 4 .3 3 6 .5 6 1 .9 2-Inch SS 4-Inch SS 6-Inch O B 2-Inch SS 4-Inch SS 6-Inch O B 2-Inch SS 4-Inch SS 6-Inch O B 2-Inch SS 4-Inch SS 6-Inch O B 2-Inch SS 6-Inch O B 2-Inch SS 4-Inch SS 6-Inch O B 4 -In c h 2 -In c h 2 -In c h 6 -In c h 2 -In c h 6 -In c h 2 -In c h 6 -In c h 2 -In c h 6 -In c h 4 -in ch 4 -in ch 2 -in ch J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-14_Offsite_Well_Details.xlsx Page 1 of 1 Table 3-15 Phase 2 and Phase 3 Off-Site Groundwater PFBS Concentrations October 2010 - April 2012 3M Decatur, AL Facility Average PFBS Concentration (ng/mL; ppb) Well ID October 2010 November 2010 July 2011 September 2011 M W -47 NS NS 0.188 NS M W -121 602S NS 0 .2 3 9 NS <0.0250 NS NS NS NS 602L 603S 0 .0 8 1 3 0 .1 5 8 NS NS NS NS NS NS 603L 604R 0 .1 1 2 NS NS NS NS NS NS NS 604S 0 .3 0 3 NS NS NS 604L 0 .2 7 9 NS NS NS 605R 0 .1 1 9 NS NS NS 605L 0 .4 0 6 NS NS NS 607R 0 .0 8 7 0 NS NS NS 607L 0 .0 6 1 5 NS NS NS 609R 0 .4 8 0 NS NS NS 609L 0 .2 5 9 NS NS NS 610S* NS NS NS 0.0527 610L NS NS NS 0.248 611R 0 .1 9 1 NS NS NS 611L 0 .3 1 7 NS NS NS M W -13S 0 .0 9 5 7 0 .0 9 5 7 NS NS M W -13I M W -13B 0 .0 8 4 3 0 .0 9 8 7 0 .0 8 4 3 0 .0 9 8 7 NS NS NS NS Notes: Average PFBS is the average of primary and duplicate sample analytical results. * Some analytical reports designate 610S as 610R NS = Not Sampled Well designations R = Residuum (shallow) S = Shallow (residuum) S = Epikarst L = Limestone bedrock I = Intermediate (epikarst) B = Bedrock March - April 2012 0 .1 7 4 < 0.0 250 0 .2 8 8 0 .0 6 9 9 0 .1 7 7 0 .0 9 4 6 0 .3 1 0 0 .3 4 0 0 .4 4 9 0 .1 3 4 0 .0 9 8 8 0 .1 8 7 0 .1 8 0 0 .4 3 3 0 .3 4 8 0 .0 5 4 3 0 .1 3 1 0 .2 9 5 0 .2 6 1 0 .0 8 3 1 0 .0 6 8 2 0 .0 8 0 3 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-15_Offsite_Phase3_GW_PFBS.xlsx Page 1 of 1 Table 3-16 Phase 2 and Phase 3 Off-Site Groundwater PFHS Concentrations October 2010 - April 2012 3M Decatur, AL Facility Average PFHS Concentration (ng/mL; ppb) Well ID October 2010 November 2010 July 2011 September 2011 M W -47 NS NS 0.138 NS M W -121 602S NS 0 .1 2 7 NS <0.0250 NS NS NS NS 602L 603S 0 .2 9 1 0 .1 2 2 NS NS NS NS NS NS 603L 604R 0 .1 0 9 NS NS NS NS NS NS NS 604S 0 .2 2 4 NS NS NS 604L 0 .2 1 5 NS NS NS 605R 0 .0 6 6 1 NS NS NS 605L 0 .6 2 2 NS NS NS 607R 0 .0 7 0 7 NS NS NS 607L 0 .0 8 2 3 NS NS NS 609R 0 .1 5 4 NS NS NS 609L 0 .4 7 7 NS NS NS 610S* NS NS NS 0.0832 610L NS NS NS 0.255 611R 0 .0 3 9 6 NS NS NS 611L 0 .1 6 7 NS NS NS M W -13S 0 .0 5 5 9 0 .0 5 5 9 NS NS M W -13I M W -13B 0 .0 5 2 6 0 .0 7 1 7 0 .0 5 2 6 0 .0 7 1 7 NS NS NS NS Notes: Average PFHS is the average of primary and duplicate sample analytical results. * Some analytical reports designate 610S as 610R NS = Not Sampled Well designations R = Residuum (shallow) S = Shallow (residuum) S = Epikarst I = Intermediate (epikarst) L = Limestone bedrock B = Bedrock March - April 2012 0 .1 1 3 < 0.0 250 0 .1 8 2 0 .2 5 2 0 .1 1 9 0 .1 0 8 0 .1 8 4 0 .2 2 9 0 .2 2 7 0 .1 1 5 0 .2 0 3 0 .1 9 2 0 .2 2 0 0 .0 9 4 7 0 .1 6 9 0 .0 7 5 6 0 .1 3 6 0 .1 2 8 0 .1 4 0 0 .0 4 0 4 0 .0 4 5 7 0 .0 5 2 1 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-16_Offsite_Phase3_GW_PFHS.xlsx Page 1 of 1 Table 3-17 Phase 2 and Phase 3 Off-Site Groundwater PFOS Concentrations October 2010 - April 2012 3M Decatur, AL Facility Average PFOS Concentration (ng/mL; ppb) Well ID October 2010 November 2010 July 2011 September 2011 M W -47 NS NS 0.210 NS M W -121 602S NS 0 .7 1 0 NS <0.0250 NS NS NS NS 602L 603S 0 .7 4 4 0 .2 2 0 NS NS NS NS NS NS 603L 604R 0 .1 0 2 NS NS NS NS NS NS NS 604S 0 .4 7 2 NS NS NS 604L 1 .4 6 NS NS NS 605R 0 .0 4 0 3 NS NS NS 605L 0 .5 2 2 NS NS NS 607R 0 .0 6 1 1 NS NS NS 607L 0 .0 9 2 0 NS NS NS 609R 0 .1 6 4 NS NS NS 609L 2.41 NS NS NS 610S* NS NS NS 0.153 610L NS NS NS 1.41 611R 0 .5 8 0 NS NS NS 611L 0 .9 3 3 NS NS NS M W -13S < 0 .0 2 5 0 < 0.0 250 NS NS M W -13I M W -13B < 0 .0 2 5 0 < 0 .0 2 5 0 < 0.0 250 < 0.0 250 NS NS NS NS Notes: Average PFOS is the average of primary and duplicate sample analytical results. * Some analytical reports designate 610S as 610R NS = Not Sampled Well designations R = Residuum (shallow) S = Shallow (residuum) S = Epikarst I = Intermediate (epikarst) L = Limestone bedrock B = Bedrock March - April 2012 0 .1 6 6 0 .0 3 0 7 0 .4 6 8 0 .5 4 4 0 .4 1 7 0 .0 9 0 5 1 .1 2 0 .4 7 8 0 .8 1 1 0 .0 5 3 2 0 .2 1 3 0 .2 7 4 0 .3 2 2 0 .1 6 2 0 .5 6 9 0 .2 7 5 0 .6 4 6 0 .6 5 0 0 .4 5 8 < 0.0 232 < 0.0 232 0 .0 3 7 6 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-17_Offsite_Phase3_GW_PFOS.xlsx Page 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 Average PFBS Average PFHS Average PFOS Concentration (ng/mL; ppb) Concentration (ng/mL; ppb) Concentration (ng/mL; ppb) Well ID MW1S MW1I MW1B MW2I MW2B MW3S MW3I MW3B MW4S MW4I MW4B November 2010 1.77 0.493 2.26 2.06 1.24 <0.0250 0.0279 0.0381 <0.0250 <0.0250 <0.0250 April 2012 NS NS NS NS NS NS NS NS NS NS NS November 2010 2.23 0.966 3.28 1.38 1.38 <0.0250 0.0324 0.0326 <0.0250 <0.0250 <0.0250 April 2012 NS NS NS NS NS NS NS NS NS NS NS November 2010 6.42 1.47 7.40 5.20 14.8 0.0306 0.262 0.283 0.256 0.144 0.0475 April 2012 NS NS NS NS NS NS NS NS NS NS NS MW13S(1) MW13I(1) MW13B(1) 0.0957 0.0843 0.0987 0.0831 0.0682 0.0803 0.0559 0.0526 0.0717 0.0404 0.0457 0.0521 <0.0250 <0.0250 <0.0250 <0.0232 <0.0232 0.0376 Notes: A v e ra g e P FB S , P F H S a n d P F O S is th e a v e ra g e o f p rim a ry and d u p lic a te s a m p le a n a lytica l results. N S = N o t S am p le d W e ll d e s ig n a tio n s S = S hallow (residuu m ) I = Interm e diate (e pikarst) B = B edrock (1) u p g ra d ie n t m o n ito rin g w e ll J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)VTablesVTable_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 MW01 MW01D MW02 MW02D MW03 MW03D MW04 MW04D MW05 MW05D MW10(1) MW10D(1) MW13 MW13D Average PFBS (ng/mL; ppb) < 0.0250 0.194 0.194 0.142 < 0.0250 < 0.0250 1.67 0.171 1.05 0.0280 0.0426 < 0.0250 4.13 5.03 Average PFHS (ng/mL; ppb) < 0.0250 0.0533 0.467 0.424 0.0667 < 0.0250 12.8 0.342 1.35 0.0323 0.121 0.0281 1.27 1.48 Average PFOS (ng/mL; ppb) < 0.0300 0.353 1.42 1.10 0.209 < 0.0300 22.5 0.184 2.08 < 0.0300 0.242 < 0.0300 8.28 8.68 Notes: A v e ra g e P F B S , P F H S a n d P F O S is th e a v e ra g e o f p rim a ry an d d u p lic a te s a m p le a n a ly tic a l re s u lts in n g /m L (p pb). W e ll d e sig n a tio n s: M W -xx = S h a llo w (re sid u u m ) m o n ito rin g w ell M W -xxD = D eep (b e d ro ck) m o n ito rin g w ell (1) u p g ra d ie n t m o n ito rin g w e ll 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 Well ID Average PFBS Concentration Average PFHS Average PFOS (ng/mL; ppb) Concentration (ng/mL; ppb) Concentration (ng/mL; ppb) April October August 2012 2012 2013 April 2012 October August 2012 2013 April 2012 October August 2012 2013 MW1R MW3R MW4R MW4L MW5R MW5L MW6R MW6L MW7R MW8R MW9R(1) MW9L(1) MW10R MW11L 0.113 1.79 0.189 0.0772 0.0402 0.263 0.334 0.0551 0.536 0.0508 <0.0250 <0.0250 0.0579 <0.0250 0.108 1.59 0.186 0.0946 <0.0250 0.201 0.175 0.0538 0.653 0.0533 0.0269 <0.0250 0.0640 <0.0250 0.109 3.91 0.648 0.0935 0.0605 0.168 0.25 0.0551 0.515 0.0583 <0.0250 <0.0250 0.0675 <0.0250 0.861 8.73 4.88 0.205 0.128 0.400 1.06 0.0952 1.87 0.128 0.0650 <0.0250 0.264 0.0886 0.751 6.19 3.70 0.231 0.0671 0.308 0.493 0.0925 2.28 0.0932 0.0848 <0.0250 0.242 0.0748 0.872 19.6 16.5 0.254 0.138 0.273 0.677 0.0855 1.77 0.119 0.0545 <0.0250 0.300 0.0777 1.61 9.70 5.81 0.348 0.128 2.07 7.91 0.372 22.5 0.410 0.062 0.0425 0.238 0.496 1.41 7.38 5.24 0.526 0.102 1.61 4.08 0.322 9.62 0.239 0.214 <0.0928 0.295 0.449 1.69 23.2 23.4 0.540 0.089 1.27 7.68 0.342 25.1 0.259 <0.0232 0.0445 0.565 0.383 Notes: A ve ra g e P FB S , P F H S a n d P F O S is th e a v e ra g e o f p rim a ry and d u p lic a te s a m p le a n a lytica l results. W e ll ID suffixe s: R = R esiduum L = B edrock (1) u p g ra d ie n t m o n ito rin g w e ll 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 1 Table 3-21 Fish M orphom etries and PFOS C oncentrations in Fish Filet in Bakers Creek April 2012 3M Decatur, A L Facility S am ple ID Date Analytical Laboratory S am p lin g Reach Length (inches) W eight (pounds) PFOS Concentration (ng/g) M SF03 4 /3 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry Upper 12 .00 0 .9 70 .7 M SF04 4 /3 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry Upper 14 .75 1 .7 576 M SF05 4 /3 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry Upper 17 .75 2 .9 471 M SF05D 4 /3 /2 0 1 2 A X Y S L a b o ra to ry Upper 656 M SF06 M SF18 4 /3 /2 0 1 2 4 /4 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry 3M E n v iro n m e n ta l L a b o ra to ry Upper Upper 14 .00 15 .75 1 .5 2 .5 156 701 M SF19 M SF20 4 /4 /2 0 1 2 4 /4 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry 3M E n v iro n m e n ta l L a b o ra to ry Upper Upper 14 .75 14 .25 1 .8 1 .0 675 1180 M SF21 4 /4 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry Upper 17 .00 2 .8 671 M SF22 M SF23 4 /4 /2 0 1 2 4 /4 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry 3M E n v iro n m e n ta l L a b o ra to ry Upper Upper 11 .25 17 .50 0 .8 3.1 4660 52 .5 M SF02 4 /3 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry M id d le 14 .50 1 .8 4240 M SF07 M SF08 4 /3 /2 0 1 2 4 /3 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry 3M E n v iro n m e n ta l L a b o ra to ry M id d le M id d le 16 .00 13 .50 2 .2 1 .3 2920 1360 M SF09 4 /3 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry M id d le 13 .25 1 .2 2020 M S F 09D (M S F 27) 4 /3 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry M id d le 2120 M SF10 M SF11 4 /3 /2 0 1 2 4 /3 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry 3M E n v iro n m e n ta l L a b o ra to ry M id d le M id d le 14 .00 1 5 .3 7 5 1 .7 2 .0 1840 2940 M SF11D M S F 1 1 D (D u p lic a te ) 4 /3 /2 0 1 2 4 /3 /2 0 1 2 A X Y S L a b o ra to ry A X Y S L a b o ra to ry M id d le M id d le 3720 3510 M SF12 M SF13 4 /3 /2 0 1 2 4 /3 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry 3M E n v iro n m e n ta l L a b o ra to ry M id d le M id d le 15 .50 18 .50 2.1 3 .3 526 950 M SF14 4 /3 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry M id d le 17 .50 3 .6 3370 M SF15 4 /3 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry M id d le 17 .50 3 .3 754 M SF01 4 /3 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry Lower 10 .75 0 .5 4770 M SF16 4 /4 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry Lower 12 .50 1 .0 1520 M SF17 4 /4 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry Lower 13 .75 1 .2 165 M S F 17D (M S F 28) 4 /4 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry Lower 180 M SF24 4 /5 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry Lower 16 .00 2.1 437 M SF24D 4 /5 /2 0 1 2 A X Y S L a b o ra to ry Lower 537 M SF25 4 /5 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry Lower 16 .50 2.1 306 M SF26 4 /5 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry Lower 15 .00 1 .7 2090 M S F 26D (M S F 29) 4 /5 /2 0 1 2 3M E n v iro n m e n ta l L a b o ra to ry Lower 2050 Notes: P F O S c o n c e n tr a tio n s a re th e a v e ra g e o f th e p rim a ry a n d d u p lic a te a n a ly tic a l re s u lts e x p re s s s e d in n g /g (p p b ) o n a w e t w e ig h t b a s is S a m p le ID s w ith a "D " s u ffix a re fie ld d u p lic a te s o b ta in e d fro m le ft s id e file t s a m p le s J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3-21_and_3-22_(new).xlsx Page 1 o f 1 Table 3-22 PFOS Concentrations and Sample Parameters in Surface Water in Bakers Creek April 2012 3M Decatur, AL Facility Sample Station ID Northing (Decimal degrees) Westing (Decimal degrees) Date Time Temperature (C) Specific conductance (pS/cm) Dissolved oxygen (mg/L) pH (S.U.) Turbidity (NTU) Average PFOS (ng/mL) Lower Reach LOC001 34.644 87.035 04/05/12 9:50 21.63 189 7.74 7.33 35.2 0.450 Middle Reach LOC002 34.638 87.029 04/05/12 10:17 21.77 187 9.75 8.13 23.5 0.691 Upper Reach LOC003 34.637 87.021 04/05/12 10:37 21.5 193 8.13 7.56 21.5 0.0237 Notes: Average PFOS concentration is the average of primary and duplicate analytical results in ng/mL (ppb) C = degrees Celsius pS/cm = microsiemen per centimeter mg/L = milligrams per liter S.U. = standard units NTU = Nephelometric Turbidity unit ng/mL = nanogram per milliliter J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3-21_and_3-22_(new).xlsx Page 1 of 1 Table 3-23 PFBS, PFHS and PFOS Concentrations in Fish Filet in the Tennessee River October - November 2012 3M Decatur, AL Facility S a m p le ID MSF071 M SF073D (M SF071) MSF074 MSF075 MSF080 MSF081 IP F 0 7 0 IP F072D (IPF070) IP F 0 7 6 IP F 0 7 7 IP F 0 7 8 IP F 0 7 9 MSF084 MSF085 MSF086 MSF087 M SF088D (M SF087) MSF089 IP F 0 8 2 IP F 0 8 3 IP F 1 1 2 IP F 1 1 3 IP F114D (IPF113) IP F 1 1 6 MSF109 M SF110D (M SF109) MSF111 MSF115 MSF119 M SF121D (M SF119) MSF124 IP F 1 1 7 IP F 1 1 8 IP F 1 2 0 IP F 1 2 2 IP F 1 2 3 MSF090 MSF091 MSF092 M SF093D (M SF092) MSF099 MSF102 IP F 1 0 0 IPF101 IP F103D (IPF101) IP F 1 0 6 IP F 1 0 7 IP F 1 0 8 S p e cie s A ve ra g e PFBS (ng/g; ppb) A ve ra g e PFHS (ng/g; ppb) A ve ra g e PFOS (ng/g; ppb) R each 01 - R iv e r M ile 320 <0.252 < 0 .2 5 0 <0.252 < 0 .2 5 0 Largem outh Bass < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 0 <0.252 <0.252 < 0 .9 8 0 < 0 .2 5 0 < 0 .2 5 0 < 0 .9 8 0 C hannel C atfish < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 0 R each 02 - P o in t M a lla rd <0.252 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 Largem outh Bass < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 < 0 .9 7 6 < 0 .9 7 6 <0.252 < 0 .2 5 0 <0.252 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 C hannel C atfish < 0 .2 5 2 < 0 .2 5 2 < 0 .1 0 0 < 0 .1 0 0 < 0 .2 5 2 < 0 .1 0 0 <0.252 < 0 .1 0 0 R each 03 - R iv e r M ile 307.5 (B ackw ater) <0.252 < 0 .9 9 0 < 0 .1 0 0 < 0 .9 9 0 < 0 .2 5 2 < 0 .1 0 0 Largem outh Bass < 0 .2 5 2 < 0 .1 0 0 < 0 .2 5 2 < 0 .1 0 0 <0.252 < 0 .1 0 0 <0.252 <0.252 < 0 .1 0 0 < 0 .1 0 0 < 0 .2 5 2 < 0 .1 0 0 C hannel C atfish < 0 .2 5 2 < 0 .2 5 2 < 0 .1 0 0 < 0 .1 0 0 < 0 .2 5 2 < 0 .1 0 0 Reach 04 - B e tty Rye and D ry B ran ch C reek <0.252 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 Largem outh Bass < 0 .2 5 2 < 0 .9 4 8 < 0 .2 5 0 < 0 .9 4 8 < 0 .2 5 2 < 0 .2 5 0 <0.252 < 0 .2 5 0 <0.252 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 C hannel C atfish < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 0 <0.252 < 0 .2 5 0 3 5 .8 3 6 .3 3 2 .7 2 7 .9 18.6 3 7 .8 1.81 1.66 0 .7 6 8 1.50 5 .1 7 0 .8 3 6 44.1 3 2 .6 4 9 .5 4 9 .0 5 6 .6 4 0 .8 2.92 3.41 1.78 1.30 1.24 2 .6 5 2 1 .8 2 2 .0 2 5 .7 3 1 .2 2 3 .9 19.9 73.2 0 .8 9 7 2.01 0.961 4 .4 5 2.11 104 159 434 432 124 218 4 .6 9 5 0 .9 4 2 .0 2 .4 2 7.85 29.1 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\Table_3-23_2012_FISH_Tissue.xlsx Page 1 o f4 Table 3-23 (Continued) PFBS, PFHS and PFOS Concentrations in Fish Filet in the Tennessee River October - November 2012 3M Decatur, AL Facility S a m p le ID MSF169 MSF170 M SF171D (M SF170) MSF172 MSF173 MSF174 IPF161 IP F162D (IPF161) IP F 1 6 3 IP F 1 6 4 IP F 1 6 5 IP F 1 6 6 MSF094 MSF096 MSF125 M SF126D (M SF126) MSF167 MSF168 IP F 0 9 5 IP F 0 9 7 IP F 0 9 8 IP F 1 0 4 IP F 1 0 5 MSF127 MSF128 MSF129 MSF130 M SF132D (M SF130) MSF131 IP F 1 4 7 IP F 1 4 8 IP F150D (IPF148) IP F 1 4 9 IPF151 IP F 1 5 2 MSF141 M SF143D (M SF141) MSF142 MSF144 MSF145 MSF146 IP F 1 3 3 IP F 1 3 4 IP F 1 3 5 IP F136D (IPF135) IP F 1 3 7 IP F 1 3 8 S p e cie s A ve ra g e PFBS (ng/g; ppb) A ve ra g e PFHS (ng/g; ppb) Reach 05 - B akers C reek < 0 .5 0 3 2.21 < 0 .2 5 0 0 .7 8 3 Largem outh Bass 2 .0 4 < 0 .5 0 3 < 0 .8 9 3 0.391 < 0 .5 0 3 < 0 .2 5 0 < 0 .2 5 2 < 0 .5 0 0 < 0 .5 0 3 < 0 .5 0 3 < 0 .2 5 0 < 0 .2 5 0 C hannel C atfish < 0 .5 0 3 < 0 .5 0 3 < 0 .2 5 0 < 0 .2 5 0 < 0 .5 0 3 < 0 .2 5 0 < 0 .5 0 3 R each 06 - Sw an C reek < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 Largem outh Bass < 0 .2 5 2 < 0 .9 6 2 < 0 .1 0 0 < 0 .9 6 2 < 0 .5 0 3 < 0 .2 5 0 < 0 .5 0 3 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 0 C hannel C atfish < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 2 R each 07 - R iv e r M ile 298 < 0 .2 5 0 0 .4 4 4 < 0 .2 5 2 0 .4 1 6 < 0 .1 0 0 Largem outh Bass < 0 .2 5 2 < 0 .2 5 2 0 .1 2 3 < 0 .1 0 0 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 0 C hannel C atfish < 0 .2 5 2 < 0 .9 0 5 < 0 .2 5 0 < 0 .9 0 5 < 0 .5 0 3 < 0 .2 5 0 < 0 .5 0 3 < 0 .2 5 0 R each 08 - R oun d Isla n d C reek < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 Largem outh Bass < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 0 C hannel C atfish < 0 .2 5 2 < 0 .9 6 2 < 0 .2 5 0 < 0 .9 6 2 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 0 A ve ra g e PFOS (ng/g; ppb) 435 373 345 9 6 .4 599 521 8 5 .6 7 9 .3 8 3 .4 283 542 286 6 9 .0 4 6 .9 4 0 .8 4 3 .9 5 0 .6 120 4 .3 7 4 .3 7 2 .2 2 4 .1 5 3.41 408 262 250 333 178 324 2 6 .9 6 9 .6 6 4 .2 5 7 .8 11.7 2 9 .2 134 4 5 .0 143 7 6 .9 175 8 0 .3 2 2 .6 3 .9 8 4 .8 9 4 .1 2 1.90 8 .5 5 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 S a m p le ID MSF001 MSF004 M SF005D (M SF004) MSF006 M SF008D (M SF006) MSF139 MSF140 IP F 0 1 2 IP F 0 1 4 IP F016D (IPF014) IP F 0 2 6 IP F 0 2 9 IPF031 MSF030 M SF032D (M SF030) MSF033 MSF035 MSF037 M SF038D (M SF037) MSF040 IP F 0 0 7 IP F 0 0 9 IP F 0 3 4 IP F 0 3 6 IP F 1 5 3 IP F154D (IPF153) MSF042 M SF043D (M SF042) MSF044 MSF045 MSF157 MSF158 IP F 0 0 2 IP F 0 0 3 IP F 0 3 9 IPF041 IP F 1 5 5 IP F156D (IPF155) MSF020 MSF021 MSF023 MSF025 MSF027 M SF028D (M SF027) IP F 0 1 8 IP F019D (IPF018) IP F 0 2 2 IP F 1 5 9 IP F 1 6 0 IP F 1 7 9 S p e cie s A ve ra g e PFBS (ng/g; ppb) A ve ra g e PFHS (ng/g; ppb) Reach 09 - Fox C reek < 1 .1 0 < 1 .1 0 < 0 .2 5 0 < 0 .2 5 0 < 1 .1 0 < 0 .2 5 0 Largem outh Bass < 1 .1 0 < 0 .2 5 0 < 0 .9 9 0 < 0 .9 9 0 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 2 < 1 .1 0 < 1 .1 0 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 0 C hannel C atfish < 1 .1 0 0 .8 8 7 < 0 .2 5 0 1.54 0 .4 6 0 < 0 .2 5 0 1.31 < 0 .2 5 0 R each 10 - B ro w n s F e rry 0 .5 9 0 < 0 .9 3 9 < 0 .2 5 0 < 0 .9 3 9 0 .4 5 9 < 0 .2 5 0 Largem outh Bass 0 .2 1 9 < 0 .2 5 0 0 .5 8 2 < 0 .2 5 0 0 .9 9 6 < 0 .2 5 0 0 .2 5 9 < 1 .1 0 < 1 .1 0 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 0 C hannel C atfish 1.862 0.371 < 0 .2 5 0 < 0 .2 5 0 < 0 .5 0 3 < 0 .2 5 0 <1.01 R e a c h 11 - M a lla rd C re e k <1.01 0.131 < 0 .2 5 0 0 .1 3 8 < 0 .2 5 0 Largem outh Bass <0.252 <0.252 < 0 .2 5 0 < 0 .2 5 0 < 0 .5 0 3 < 0 .2 5 0 < 0 .5 0 3 < 1 .1 0 3.82 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 0 C hannel C atfish 0 .3 0 5 0 .4 0 5 < 0 .2 5 0 < 0 .2 5 0 < 0 .5 0 3 < 0 .2 5 0 < 0 .9 4 3 < 0 .9 4 3 R each 12 - E lk R ive r < 1 .1 0 < 0 .2 5 0 < 1 .1 0 < 0 .2 5 0 Largem outh Bass 0 .1 8 4 0 .2 9 4 < 0 .2 5 0 < 0 .2 5 0 0 .1 7 6 < 0 .2 5 0 0 .8 5 9 < 1 .1 0 < 0 .9 6 6 < 0 .2 5 0 < 0 .2 5 0 < 0 .9 6 6 C hannel C atfish < 1 .1 0 < 0 .5 0 3 < 0 .2 5 0 < 0 .2 5 0 < 0 .5 0 3 < 0 .2 5 0 0 .5 0 6 < 0 .5 0 0 A ve ra g e PFOS (ng/g; ppb) 259 167 168 173 186 279 281 12.1 14.3 14.6 4 5 .5 18.6 2 1 .9 6 5 .2 56.1 190 207 101.9 106 104 8 .8 6 13.4 8 .1 2 14.4 16.3 14.5 210 224 116 225 115 145 8 .4 9 18.3 15.7 2 2 .2 11.9 12.3 6 5 .8 9 8 .2 5 4 .9 6 6 .4 6 5 .3 6 5 .9 11.7 10.2 5 .1 0 11.2 4 .8 7 10.7 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 S a m p le ID MSF010 MSF011 MSF013 MSF015 MSF017 IP F 0 2 4 IP F 1 7 5 IP F 1 7 6 IP F177D (IPF176) IP F 1 7 8 IP F 1 8 0 MSF046 MSF048 M SF050D (M SF048) MSF052 M SF054D (M SF052) M SF054D MSF056 MSF058 IP F 0 4 7 IP F 0 4 9 IPF051 IP F 0 5 3 IP F 0 5 5 MSF060 MSF061 MSF062 M SF064D (M SF062) MSF065 MSF067 IP F 0 5 7 IP F059D (IPF057) IP F 0 6 3 IP F 0 6 6 IP F 0 6 8 IP F 0 6 9 S p e cie s A ve ra g e PFBS (ng/g; ppb) A ve ra g e PFHS (ng/g; ppb) R each 13 - R iv e r M ile 281 < 1 .1 0 NR < 0 .2 5 0 < 0 .2 5 0 Largem outh Bass < 1 .1 0 < 0 .2 5 0 < 1 .1 0 < 0 .2 5 0 < 1 .1 0 2 .6 7 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 0 < 0 .5 0 0 C hannel C atfish < 0 .2 5 2 < 0 .2 5 2 < 0 .5 0 0 < 0 .5 0 0 0 .3 2 2 < 0 .5 0 0 < 0 .2 5 2 < 0 .5 0 0 R each 14 - B ig N ance C ree k [W ils o n R e s e rv o ir] < 0 .2 5 2 < 0 .2 5 0 0 .2 6 9 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 0 Largem outh Bass < 0 .2 5 2 < 0 .9 9 0 < 0 .2 5 0 < 0 .9 9 0 <0.901 <0.901 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 2 0 .3 2 7 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 0 C hannel C atfish 0 .3 3 7 < 0 .2 5 0 1.54 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 0 R each 15 - S hoal C reek [W ilso n R e se rvo ir] < 0 .2 5 2 0 .2 8 9 < 0 .2 5 0 < 0 .2 5 0 Largem outh Bass < 0 .2 5 2 < 0 .7 9 7 < 0 .2 5 0 < 0 .7 9 7 < 0 .2 5 2 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 2 0 .3 2 7 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 0 C hannel C atfish 0 .8 5 4 0 .3 5 3 < 0 .2 5 0 < 0 .2 5 0 < 0 .2 5 2 < 0 .2 5 0 0 .7 3 9 < 0 .2 5 0 A ve ra g e PFOS (ng/g; ppb) 7 1 .0 9 8 .5 6 8 .9 67.1 7 9 .6 10.3 8 .5 7 11.8 12.7 10.5 7 .6 9 54.1 8 8 .9 8 1 .6 9 3 .5 9 1 .7 103 5 4 .8 7 5 .3 14.3 5 .5 9 8.01 6 .6 8 11.0 6 4 .7 7 5 .5 103 9 9 .8 8 6 .9 9 4 .6 7 .3 3 7 .5 6 6 .6 7 10.5 9 .6 0 5 .6 3 Notes: PFBS, P FH S and P F O S co n ce n tra tio n s are th e a verag e o f th e prim ary and d u p lica te a n a lytica l results e xpresse d in ng/g (ppb) on a w e t w e ig h t basis S am ple IDs w ith a "D " suffix are field duplicates obtained from left side file t sam ples Field d u p lica te s a m p le s identified w ith "D " su ffix and th e co rre spo n ding p rim a ry sa m p le ID in p a re n the ses na = not applicable NR - N ot reported d ue to qua lity control issues J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-23_2012_FISH_Tissue.xlsx Page 4 of 4 Table 3-24 PFBS, PFHS and PFOS Concentrations in Surface Water in the Tennessee River - Fish Reach Locations November 2012 3M Decatur, AL Facility Sampling Reach No. Reach 01 Reach 02 Reach 03 Reach 04 Reach 05 Reach 06 Reach 07 Reach 08 Reach 09 Reach 10 Reach 11 Reach 12 Reach 13 Reach 14 Reach 15 Sampling Reach River Mile 320 Point Mallard RM 307.5 (Backwater) Betty Rye & Dry Branch Creek Bakers Creek Swan Creek River Mile 298 Round Island Creek Fox Creek Browns Ferry Mallard Creek Elk River Rive Mile 281 Big Nance Creek Shoal Creek Location Number L1 L2 L3 L1 L2 L3 L3 (DUP) L3 (DUP1) L1 L2 L3 L1 L2 L3 L1 L1 (DUP) L1 (DUP1) L2 L3 L1 L2 L2 (DUP1) L3 L1 L2 L3 L1 L2 L3 L1 L2 L3 L1 L2 L3 L3 (DUP) L3 (DUP1) L1 L2 L3 L1 L2 L3 L1 L2 L3 L1 L2 L3 L1 L1 (DUP) L1 (DUP1) L2 L3 Sample ID DAL-SW-R01L1-0-121116 Date Time 11/16/2012 10:45 Analytical Laboratory 3M Laboratory DAL-SW-R01L2-0-121116 11/16/2012 11:15 3M Laboratory DAL-SW-R01L3-0-121116 DAL-SW-R02L1-0-121116 11/16/2012 11:40 3M Laboratory 11/16/2012 12:50 3M Laboratory DAL-SW-R02L2-0-121116 11/16/2012 13:05 3M Laboratory DAL-SW-R02L3-0-121116 11/16/2012 13:20 3M Laboratory DAL-SW-R02L3-DUP-121116 11/16/2012 13:20 3M Laboratory DAL-SW-R02L3-DUPA-12111 11/16/2012 13:20 AXYS Laboratory DAL-SW-R03L1-0-121116 11/16/2012 13:50 3M Laboratory DAL-SW-R03L2-0-121116 11/16/2012 14:00 3M Laboratory DAL-SW-R03L3-0-121116 DAL-SW-R04L1-0-121116 11/16/2012 14:08 3M Laboratory 11/16/2012 14:45 3M Laboratory DAL-SW-R04L2-0-121116 11/16/2012 15:00 3M Laboratory DAL-SW-R04L3-0-121116 11/16/2012 15:10 DAL-SW-R05L1-0-121119 11/19/2012 16:25 DAL-SW-R05L1-DUP-121119 11/19/2012 16:25 3M Laboratory 3M Laboratory 3M Laboratory DAL-SW-R05L1-DUPA-12111 11/19/2012 16:25 AXYS Laboratory DAL-SW-R05L2-0-121119 11/19/2012 16:35 3M Laboratory DAL-SW-R05L3-0-121119 DAL-SW-R06L1-0-121120 11/19/2012 16:45 3M Laboratory 11/20/2012 16:15 3M Laboratory DAL-SW-R06L2-0-121120 11/20/2012 16:30 3M Laboratory DAL-SW-R06L2-DUPA-12112 11/20/2012 16:30 AXYS Laboratory DAL-SW-R06L3-0-121120 DAL-SW-R07L1-0-121119 11/20/2012 16:40 3M Laboratory 11/19/2012 15:10 3M Laboratory DAL-SW-R07L2-0-121119 11/19/2012 15:25 3M Laboratory DAL-SW-R07L3-0-121119 DAL-SW-R08L1-0-121119 11/19/2012 15:40 3M Laboratory 11/19/2012 14:05 3M Laboratory DAL-SW-R08L2-0-121119 11/19/2012 14:20 3M Laboratory DAL-SW-R08L3-0-121119 DAL-SW-R09L1-0-121119 11/19/2012 14:35 3M Laboratory 11/19/2012 11:40 3M Laboratory DAL-SW-R09L2-0-121119 11/19/2012 11:50 3M Laboratory DAL-SW-R09L3-0-121119 DAL-SW-R10L1-0-121119 11/19/2012 12:05 3M Laboratory 11/19/2012 10:35 3M Laboratory DAL-SW-R10L2-0-121119 11/19/2012 10:48 3M Laboratory DAL-SW-R10L3-0-121119 11/19/2012 11:00 3M Laboratory DAL-SW-R10L3-DUP-121119 11/19/2012 11:00 3M Laboratory DAL-SW-R10L3-DUPA-12111 11/19/2012 11:00 AXYS Laboratory DAL-SW-R11L1-0-121119 11/19/2012 9:35 3M Laboratory DAL-SW-R11L2-0-121119 11/19/2012 9:45 3M Laboratory DAL-SW-R11L3-0-121119 DAL-SW-R12L1-0-121117 11/19/2012 10:00 3M Laboratory 11/17/2012 16:20 3M Laboratory DAL-SW-R12L2-0-121117 11/17/2012 16:35 3M Laboratory DAL-SW-R12L3-0-121117 DAL-SW-R13L1-0-121117 11/17/2012 16:50 3M Laboratory 11/17/2012 15:15 3M Laboratory DAL-SW-R13L2-0-121117 11/17/2012 15:35 3M Laboratory DAL-SW-R13L3-0-121117 DAL-SW-R14L1-0-121117 11/17/2012 15:50 3M Laboratory 11/17/2012 11:10 3M Laboratory DAL-SW-R14L2-0-121117 11/17/2012 11:30 3M Laboratory DAL-SW-R14L3-0-121117 11/17/2012 11:45 DAL-SW-R15L1-0-121117 11/17/2012 12:25 DAL-SW-R15L1-DUP-121117 11/17/2012 12:25 3M Laboratory 3M Laboratory 3M Laboratory DAL-SW-R15L1-DUPA-12111 11/17/2012 12:25 AXYS Laboratory DAL-SW-R15L2-0-121117 DAL-SW-R15L3-0-121117 11/17/2012 12:55 3M Laboratory 11/17/2012 13:10 3M Laboratory Average PFBS (ng/mL; ppb) < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 0.00270 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 0.0104 0.124 0.116 0.166 < 0.00500 < 0.00500 < 0.00500 < 0.00500 0.00269 < 0.00500 0.0464 0.0638 0.00965 < 0.00500 < 0.00500 < 0.00500 0.0641 0.0846 0.0594 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00215 0.0521 0.0511 0.0289 < 0.00500 < 0.00500 < 0.00500 0.0100 0.0120 0.00983 0.00761 0.00769 0.00847 0.0148 0.0137 0.0206 0.0132 0.0141 Average PFHS (ng/mL; ppb) < 0.00500 < 0.00500 < 0.00500 < 0.00500 0.00703 < 0.00500 < 0.00500 < 0.00190 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 0.0110 0.0398 0.0423 0.0355 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00242 < 0.00500 0.0164 0.0195 < 0.00500 < 0.00500 < 0.00500 < 0.00500 0.0197 0.0262 0.0196 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00215 0.0179 0.0189 0.0113 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00500 < 0.00220 < 0.00500 < 0.00500 Notes: Average PFBS, PFHS and PFOS concentrations are the averages of prim ary and duplicate analytical results in ppb. 1Sam ple duplicate analyzed by AXYS Laboratory in British Columbia, Canada. DUP = Duplicate sample Average PFOS (ng/mL; ppb) 0.00691 0.00762 0.00669 0.00932 0.00906 0.00894 0.00846 0.00759 0.00703 0.00734 0.00639 0.0144 0.0180 0.0705 0.385 0.405 0.388 0.0177 0.00984 0.00684 0.00672 0.00766 0.00677 0.0842 0.102 0.0348 0.00642 0.00657 0.00767 0.103 0.125 0.0910 0.00682 0.00699 0.00649 0.00663 0.00548 0.0878 0.0910 0.0695 0.0124 0.0138 0.0133 0.0248 0.0277 0.0238 0.0187 0.0190 0.0230 0.0199 0.0189 0.0220 0.0184 0.0181 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-24_3-25_2012_FISH_SWxlsx Page 1 of 1 Table 3-25 PFBS, PFHS and PFOS Concentrations in Surface W ater in the Tennessee River - Surface W ater Transects December 2012 3M Decatur, AL Facility Transect No. T1 T2 T3 T4 T5 Location Number 01 01 (DUP) 01 (DUP1) 02 03 04 05 06 07 08 09 10 01 02 02 (DUP) 02 (DUP1) 03 04 05 06 07 08 09 10 01 02 03 03 (DUP) 03 (DUP1) 04 05 06 07 08 09 10 01 02 03 04 04 (DUP) 04 (DUP1) 05 06 07 08 09 10 01 02 03 04 05 05 (DUP) 05 (DUP1) 06 07 08 09 10 Average PFBS (ng/mL; ppb) < 0.0050 < 0.00500 < 0.00201 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.00500 0.00383 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.00500 < 0.00207 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 0.285 < 0.0050 < 0.0050 < 0.0050 < 0.00500 < 0.00237 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 0.105 0.115 0.0638 < 0.0050 < 0.0050 < 0.00500 < 0.00223 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 Average PFHS (ng/mL; ppb) < 0.0050 < 0.00500 < 0.00201 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 0.00938 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.00500 < 0.00203 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.00500 < 0.00207 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 0.0174 < 0.0050 < 0.0050 < 0.0050 < 0.00500 < 0.00237 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 0.0143 0.0126 0.00835 < 0.0050 < 0.0050 < 0.00500 < 0.00223 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 Average PFOS (ng/mL; ppb) 0.00613 0.00636 0.00526 0.00615 0.00680 0.00689 0.00663 0.00643 0.00638 0.00660 0.00645 0.00670 0.00835 0.00993 0.00943 0.00844 0.00650 0.00623 0.00696 0.00679 0.00683 0.00644 0.00698 0.00777 0.0190 0.00746 0.00694 0.00751 0.00668 0.00768 0.00730 0.00611 0.00657 0.00698 0.00658 0.00732 0.138 0.00869 0.00752 0.00729 0.00846 0.00630 0.00821 0.00742 0.00731 0.00704 0.00673 0.00778 0.0728 0.0765 0.0492 0.00789 0.00720 0.00678 0.00510 0.00682 0.00810 0.00820 0.00815 0.00857 J:\3M-DECAT\2013 SulfonatesReport\Final (September 2014)\Tables\ Page 1 of 2 Table 3-25 (Continued) PFBS, PFHS and PFOS Concentrations in Surface W ater in the Tennessee River - Surface W ater Transects December 2012 3M Decatur, AL Facility Transect No. T6 T7 T8 T9 Location Number 01 02 03 04 05 06 06 06 (DUP) 06 (DUP1) 07 08 09 10 01 02 03 04 05 06 07 07 (DUP) 07 (DUP1) 08 09 10 01 02 03 04 05 06 07 08 08 (DUP) 08 (DUP1) 09 10 01 02 03 04 05 06 07 08 09 09 (DUP) 09 (DUP1) 10 Average PFBS (ng/mL; ppb) 0.0896 0.124 0.0570 0.0237 0.0124 < 0.0050 < 0.00500 0.00214 < 0.00201 < 0.0050 < 0.0050 < 0.0050 < 0.0050 0.0710 0.0651 0.0556 0.0325 0.0362 0.0269 0.0190 0.0210 0.0150 0.0140 0.0106 0.0177 0.0130 0.0125 0.0132 0.0143 0.0129 0.0121 0.0115 0.0112 0.0109 0.0114 0.00928 0.0111 0.0177 0.0112 0.0142 0.0137 0.0147 0.0139 0.0127 0.0134 0.0128 0.0140 0.0126 0.0134 Average PFHS (ng/mL; ppb) 0.0242 0.0180 0.00919 < 0.0050 < 0.0050 < 0.0050 < 0.00500 < 0.00201 < 0.00201 < 0.0050 < 0.0050 < 0.0050 < 0.0050 0.00807 0.00837 0.00769 < 0.0050 0.00517 < 0.0050 < 0.0050 < 0.00500 < 0.00218 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.00500 < 0.00210 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.0050 < 0.00500 < 0.00232 < 0.0050 Average PFOS (ng/mL; ppb) 0.0864 0.107 0.0566 0.0238 0.0145 0.00972 0.0111 0.00745 0.00862 0.00649 0.00692 0.00766 0.00783 0.0426 0.0466 0.0468 0.0316 0.0312 0.0242 0.0202 0.0193 0.0173 0.0165 0.0134 0.0176 0.0152 0.0154 0.0159 0.0166 0.0154 0.0121 0.0141 0.0133 0.0143 0.0128 0.0115 0.0123 0.0203 0.0205 0.0201 0.0207 0.0244 0.0197 0.0214 0.0203 0.0192 0.0194 0.0177 0.0190 Notes: Average PFBS, PFHS and PFOS concentrations are the averages of prim ary and duplicate analytical results. 1Sam ple duplicates analyzed by AXYS Laboratory in British Columbia, Canada. DUP = Duplicate sample J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-24_3-25_2012_FISH_SWxlsx Page 2 of 2 T a ble 3-26 PFBS, PFHS and PFOS C o n ce n tra tio n s fo r A venu e A G ro u n d w a te r, S u rfa c e W ater, S o il an d S e d im e n t S am p le s June - Ju ly 2010 3M D ecatur, A L F a cility Location ID SW01 SW02 SW03 SW04 SW05 SW06 SW07 SW08 SW09 SW10 SW11 SW12 GP01 GP02 GP03 GP04 GP05 GP07 GP08 GP09 GP10 GP11 GP12 216R SD01 SD01 SD02 SD02 SD03 SD03 SD04 SD04 SD05 SD05 SD06 SD06 SD07 SD07 SD08 SD08 (DUP) SD08 SD09 SD09 SD10 SD10 SD11 SD11 SD12 SD12 (DUP) SD12 SD13 SD13 SD14 SD14 SD15 SD15 SD16 SD16 (DUP) SD16 SD17 SD17 Sample Depth (ft bgs) Average PFBS Average PFHS ------------- ------------- 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 Surface Water (ng/mL) 15.0 7.68 9.57 13.7 20.9 17.4 10.8 40.7 279 22.5 102 0.764 Groundwater (ng/mL) 5.02 21.1 66.4 19.1 30.0 20.7 6.36 20.7 447 67.0 2.59 10.6 Sediment (ng/g) 0.611 0.605 6.03 1.21 7.31 3.41 24.9 8.93 4.72 4.35 6.24 3.37 8.75 9.48 5.28 4.80 1.62 27.5 14.0 171 66.5 8.42 4.10 16.9 17.3 5.31 10.4 12.6 129 100 52.3 17.3 27.2 33.6 22.6 28.2 24.8 120 52.0 72.2 86.5 102 77.5 47.9 166 643 233 1130 3.68 7.63 11.2 413 85.8 158 171 70.2 36.0 420 330 11.2 30.5 2.78 1.72 64.5 12.7 48.1 19.0 178 79.0 34.5 26.0 39.6 18.9 51.8 60.9 42.9 46.0 9.03 135 101 1030 459 156 57.9 289 293 77.0 123 138 1450 1460 399 146 764 830 569 1080 853 Average PFOS 248 213 197 192 392 228 129 266 382 389 850 104 26.2 17.5 373 152 382 1780 1420 95.5 127 660 48.8 119 225 129 6770 1070 897 559 2120 1910 525 310 617 338 1660 2430 521 540 93.2 1300 1250 4570 7830 1560 786 3210 3270 451 1250 1480 9130 5370 14600 13200 7060 8590 3120 10700 7120 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Ta Table_3-26_3-27_AveA_Sample_Data_Original_2011.xlsx Page 1 of 3 Table 3-26 (Continued) PFBS, PFHS and PFOS Concentrations for Avenue A Groundwater, Surface Water, Soil and Sediment Samples June - July 2010 3M Decatur, AL Facility Location ID SS01 SS01 SS02 SS02 SS03 SS03 SS03 (DUP) SS04 SS04 SS05 SS05 SS06 SS06 SS06 (DUP) SS07 SS07 SS08 SS08 (DUP) SS08 SS09 SS09 GP01 GP01 GP01 GP01 GP02 GP02 GP02 GP02 (DUP) GP02 GP03 GP03 GP03 GP03 (DUP) GP03 GP04 GP04 GP04 GP04 GP05 GP05 GP05 GP05 GP06 GP06 GP06 GP06 GP07 GP07 GP07 GP07 GP08 GP08 GP08 (DUP) GP08 GP08 GP09 GP09 GP09 (DUP) GP09 GP09 Sample Depth (ft bgs) 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 0 - 0.5 0.5 - 1.0 2.0 - 2.5 6.0 - 6.5 0 - 0.5 0.5 - 1.0 2.0 - 2.5 2.0 - 2.5 12.0 - 12.5 0 - 0.5 0.5 - 1.0 2.0 - 2.5 2.0 - 2.5 5.0 - 5.5 0 - 0.5 0.5 - 1.0 2.0 - 2.5 5.0 - 5.5 0 - 0.5 0.5 - 1.0 2.0 - 2.5 5.5 - 6.0 0 - 0.5 0.5 - 1.0 2.0 - 2.5 11.0 - 11.5 0 - 0.5 0.5 - 1.0 2.0 - 2.5 13.0 - 13.5 0 - 0.5 0.5 - 1.0 0.5 - 1.0 2.0 - 2.5 5.0 - 5.5 0 - 0.5 0.5 - 1.0 0.5 - 1.0 2.0 - 2.5 5.0 - 5.5 Average PFBS Soil (ng/g) 0.909 0.452 0.786 4.11 4.09 3.92 5.27 2.61 0.966 22.5 6.71 1.27 0.533 0.433 11.6 9.20 1.67 1.42 1.61 1.53 1.44 5.73 3.86 3.55 2.11 1.37 0.701 0.345 0.392 2.59 5.71 32.6 40.1 49.0 12.8 4.51 2.16 1.72 2.78 12.3 5.29 1.75 5.11 1.86 0.801 0.180 0.858 1.69 0.991 1.22 12.7 NR 0.320 0.397 0.231 0.693 17.8 4.71 5.73 1.37 3.83 Average PFHS 4.73 5.06 7.26 54.6 212 109 118 5.59 2.03 288 67.6 2.61 1.17 0.975 59.6 66.3 4.80 4.01 1.70 7.02 4.53 5.99 4.92 10.0 3.11 0.175 < 0.200 0.113 < 0.200 1.58 41.8 252 321 417 82.2 3.32 1.55 4.83 12.8 8.82 12.7 7.95 48.6 4.09 2.79 1.46 1.86 17.7 34.7 25.3 146 NR 11.3 13.7 7.32 10.7 244 43.1 64.6 5.23 6.26 Average PFOS 750 919 405 168 NR 2880 2110 506 179 10600 4040 331 164 132 747 3140 53.9 46.5 26.2 635 416 366 125 292 29.0 66.3 76.7 195 173 5.48 700 2070 1450 1240 352 840 513 99.2 33.2 346 381 429 1080 209 447 136 41.4 599 3680 1870 14000 5160 770 1010 322 337 3630 1630 2280 331 64.3 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Ta Table_3-26_3-27_AveA_Sample_Data_Original_2011.xlsx Page 2 of 3 Table 3-26 (Continued) PFBS, PFHS and PFOS Concentrations for Avenue A Groundwater, Surface Water, Soil and Sediment Samples June - July 2010 3M Decatur, AL Facility Location ID Sample Depth (ft bgs) Average PFBS Average PFHS Average PFOS GP10 GP10 GP10 GP10 GP11 GP11 GP11 GP11 GP11 (DUP) GP12 GP12 GP12 GP12 Notes: -- = Not Applicable DUP = Duplicate 0 - 0.5 0.5 - 1.0 2.0 - 2.5 6.0 - 6.5 0 - 0.5 0.5 - 1.0 2.0 - 2.5 6.5 - 7.0 6.5 - 7.0 0 - 0.5 0.5 - 1.0 2.0 - 2.5 17.0 - 17.5 Soil (ng/g (continued) 28.4 46.5 99.8 76.6 3.57 6.29 23.8 5.68 7.68 0.607 0.521 1.88 2.01 141 229 162 126 20.9 45.0 30.7 33.2 55.0 4.77 2.75 6.81 9.74 734 581 297 139 157 123 242 290 579 666 407 460 59.1 ft bgs = feet below ground surface 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)\Ta Table_3-26_3-27_AveA_Sample_Data_Original_2011.xlsx Page 3 of 3 Table 3-27 PFBS, PFHS and PFOS Concentrations for Avenue A Groundwater Samples January 2011 3M Decatur, AL Facility Sample Locations Average PFBS (ng/mL) Average PFHS (ng/mL) Average PFOS (ng/mL) SS22 3.39 1.84 8.62 SS24 19.2 143 500 210R 43.2 309 539 Notes: Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results in ng/mL (ppb). Temporary wells SS22 and SS24 and the monitoring well 210R were installed in the residuum. J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-26_3-27_AveA_Sample_Data_Original_2011.xlsx Page 1 of 1 Table 3-28 On-Site Avenue A Soil and Sediment PFBS, PFHS and PFOS Concentrations January 2011 3M Decatur, AL Facility Sample Location SS12 SS12 SS13 SS16 SS16 DUP SS11 SS11 SS20 SS20 DUP SS19 SS19 SS15 SS17 SS14 SS18 SS10 SS30 SS30 SS30 SS25 SS25 SS25 SD22 SD22 SD22 DUP SD22 SD21 SD21 SD21 SS24 SS24 SS24 SS29 SS29 SS29 SS20 SS13 SS13DUP SS15 SS17 SS14 SS18 SS16 Depth (ft bgs) 0 - 0.5 0.5 - 1 0 - 0.5 0 - 0.5 0 - 0.5 0 - 0.5 0.5 - 1 0 - 0.5 0 - 0.5 0 - 0.5 0.5 - 1 0 - 0.5 0 - 0.5 0 - 0.5 0 - 0.5 0 - 0.5 0 - 0.5 0.5 - 1 1.5 - 2 0 - 0.5 0.5 - 1 1.5 - 2 0 - 0.5 0.5 - 1 0.5 - 1 1.5 - 2 0 - 0.5 0.5 - 1 1.5 - 2 0 - 0.5 0.5 - 1 1.5 - 2 0 - 0.5 0.5 - 1 1.5 - 2 0.5 - 1 0.5 - 1 0.5 - 1 0.5 - 1 0.5 - 1 0.5 - 1 0.5 - 1 0.5 - 1 Average PFBS (ng/g; ppb) 1.17 4 .8 9 1.01 7 .2 4 7 .5 4 0 .6 9 6 0 .6 2 7 0 .3 0 9 0 .2 4 7 0 .2 2 4 1.30 0 .2 8 3 0 .2 2 8 0 .4 9 4 0 .8 1 4 5 .2 8 0 .5 4 8 < 0.500 1.22 19.7 3 3 .8 3 5 .0 13.9 7 .7 0 6 .4 9 8 .1 9 7 .8 6 10.4 5 .4 6 6 .1 4 8 .8 0 3 .1 7 1.67 0 .7 6 0 6 .3 0 0 .2 9 9 0 .9 8 8 0 .9 0 6 0 .1 5 4 0 .2 2 6 < 0.500 < 0.500 2 .3 9 Average PFHS (ng/g; ppb) 13.7 186 1.93 6 .7 4 6 .4 8 0 .9 1 8 4 .3 0 2 .6 8 2 .2 7 2 .2 2 14.6 3 .4 9 2 .1 3 4 .1 8 2 .3 3 29.1 3 .8 3 0 .8 6 9 8 .0 6 607 516 295 193 6 8 .3 69.1 6 2 .8 107 148 5 7 .7 6 1 .3 6 1 .0 3 4 .2 9 .6 4 3 .6 4 4 3 .3 1.70 2 .1 7 2 .2 3 1.26 3 .0 6 3 .1 2 0 .5 9 7 2.61 Average PFOS (ng/g; ppb) 2110 5830 123 312 300 5 7 .4 9 8 .9 102 107 NR 397 272 6 1 .2 324 7 8 .9 3730 437 130 309 3320 2520 2020 4060 887 1120 473 2020 1650 562 1320 974 1600 605 271 1070 2 9 .4 559 552 170 220 271 3 0 .8 303 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ T able_3-28_Ave A Soil and Sediment PFBS PFHS PFOS DATA Jan 2011.xlsx Page 1 o f2 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 .0 0 5 .4 8 165 SS10 0.5 - 1 1.25 7.81 453 SS10 DUP 0.5 - 1 1.18 6 .7 7 365 SS10 1.5 - 2 3 .5 8 19.8 471 SD20 0 - 0.5 10.3 160 2800 SD20 0.5 - 1 10.8 139 1300 SD20 1.5 - 2 9 .6 8 121 672 SD23 0 - 0.5 4 .9 7 4 4 .6 518 SD23 0.5 - 1 2 .4 2 2 2 .5 270 SD23 1.5 - 2 2 .0 8 16.1 176 SS28 0 - 0.5 0 .8 3 7 0 .8 8 8 163 SS28 0.5 - 1 0 .6 3 3 0 .8 7 9 197 SS28 DUP 0.5 - 1 0 .6 0 4 0 .8 0 4 196 SS28 1.5 - 2 2 .2 9 4.31 174 SS27 0 - 0.5 0 .7 4 4 0.341 145 SS27 0.5 - 1 0 .6 5 2 0.471 241 SS27 1.5 - 2 0 .4 1 2 0 .4 1 5 162 SS22 0 - 0.5 1.39 4 .4 0 273 SS22 0.5 - 1 1.41 2 .4 7 157 SS22 DUP 0.5 - 1 1.45 2 .2 9 151 SS22 1.5 - 2 0 .5 2 3 0 .8 6 4 2 7 .3 SS21 0 - 0.5 0 .8 2 3 14.0 1130 SS21 0.5 - 1 0 .3 6 7 13.4 325 SS21 1.5 - 2 1.95 13.0 121 SD18 0 - 0.5 9 .7 0 107 1000 SD18 0.5 - 1 7 .5 7 7 8 .6 545 SD18 1.5 - 2 5 .7 7 4 7 .8 NR SD19 0 - 0.5 12.9 119 873 SD19 0.5 - 1 14.0 127 1080 SD19 1.5 - 2 8 .5 0 7 5 .7 345 SS26 0 - 0.5 0 .5 5 2 8 .2 6 970 SS26 DUP 0 - 0.5 0 .6 6 6 9 .9 5 NR SS26 0.5 - 1 1.03 17.7 1140 SS26 1.5 - 2 2 .8 7 6 2 .4 1040 SS12 1.5 - 2 10.7 294 2520 SS19 1.5 - 2 1.84 2 3 .6 294 SS20 1.5 - 2 0 .4 8 3 2 .3 8 206 SS14 1.5 - 2 < 0.500 2 .9 3 223 SS17 1.5 - 2 0 .8 8 6 1.97 221 SS13 1.5 - 2 1.48 1.93 357 SS15 1.5 - 2 0 .2 6 9 3 .8 5 109 SS18 1.5 - 2 0 .2 4 6 1.63 156 SS11 1.5 - 2 < 0.500 0 .5 1 5 NR N o te s: Average PFBS, PFHS and PFOS is the average of primary and duplicate sample analytical results on a dry weight basis. ft bgs = feet below ground surface DUP = Duplicate sample NR = Not reported due to quality control issues SS = surface soil SD = sediment J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ T able_3-28_Ave A Soil and Sediment PFBS PFHS PFOS DATA Jan 2011.xlsx Page 2 of 2 Table 3-29 On-Site Area Adjacent to Field 6 Soil Boring PFBS, PFHS and PFOS Concentrations December 2012 3M Decatur, AL Facility Sample ID DAL SB DF601 0 0000 121213 DAL SB DF601 0 0050 121213 DAL SB DF602 0 0000 121213 DAL SB DF602 0 0050 121213 DAL SB DF603 0 0000 121213 DAL SB DF603 0 0050 121213 Sample Depth 0 - 0.5 ft 5 - 5.5 ft 0 - 0.5 ft 5 - 5.5 ft 0 - 0.5 ft 5 - 5.5 ft PFBS (ng/g, ppb) NR 1.67 0.373 64.8 0.423 2.43 PFHS (ng/g, ppb) 33.3 5.04 3.56 270 NR 6.58 PFOS (ng/g, ppb) 3890 229 851 1730 112 3.86 Notes: P F B S , P F H S an d P F O S c o n c e n tra tio n s are th e a v e ra g e o f p rim a ry an d d u p lic a te s a m p le a n a ly tic a l re s u lts on a d ry w e ig h t basis. NR - not reported J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-29-Field_6_Soil_Boring_Results_Dec_2012.xls Page 1 of 1 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 Location ID Average PFBS Concentration (ng/mL; ppb) February October August 2012 2012 2013 ET01 0.0354 NS NS ET02 ET03 <0.0250 <0.0250 <0.0250 <0.0250 0.0350 0.0563 ET04 ET05 WT01 DC01 <0.0250 NS NS NS 0.0513 <0.0250 <0.0250 0.115 0.0362 NS NS NS Average PFHS Concentration (ng/mL; ppb) February October 2012 2012 <0.0250 <0.0250 <0.0250 <0.0250 NS NS NS NS <0.0250 <0.0250 0.0364 0.0748 0.0733 0.232 August 2013 NS <0.0250 0.0806 <0.0250 NS NS NS Average PFOS Concentration (ng/mL; ppb) February October 2012 2012 0.0302 0.0627 0.303 4.30 NS NS NS NS <0.0250 0.230 0.200 0.155 <0.0250 1.54 August 2013 NS 0.0546 0.278 0.109 NS NS NS Notes: A v e ra g e P FB S , P F H S a n d P F O S is th e a v e ra g e o f p rim a ry and d u p lic a te s a m p le a n a lytica l results. E T = E astern T ributa ry W T = W e ste rn T rib u ta ry D C = D ry C ree k N S = N ot S am p le d J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-30_and_3-31_Browns_Ferry_Road_Site_SW_SD_PFBS PFHS PFOS_2012.xls Page 1 of 1 Table 3-31 Browns Ferry Road Site Sediment PFBS, PFHS and PFOS Concentrations February 2012 Location ID ET01 ET02 ET02 (field duplicate) ET03 ET04 Average PFBS (ng/g; ppb) 3.95 8.59 10 12.1 23.8 Average PFHS (ng/g; ppb) <0.500 <0.500 <0.500 <0.500 <0.500 Average PFOS (ng/g; ppb) <0.500 <0.500 <0.500 <0.500 <0.500 Notes: A v e ra g e P F B S , P F H S and P F O S is th e a v e ra g e o f p rim a ry and d u p lic a te s a m p le a n a ly tic a l re s u lts o n a dry w e ig h t basis. J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Tables\ Table_3-30_and_3-31_Browns_Ferry_Road_Site_SW_SD_PFBS PFHS PFOS_2012.xls Page 1 of 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 December 2012 for the 3M Decatur Alabama facility under the sulfonate sampling program. Sulfonate sampling has been performed by 3M on a voluntary basis in conjunction with sampling performed under the PFOA MOU Program. The PFOA MOU program was conducted in a phased manner (i.e., Phase 1, 2 and 3). The sulfonate sampling results associated with the Phase 1 and 2 MOU activities (October 2004 through December 2006) were provided to the EPA in the PSDR in September 2008. The following subsections present the key findings from sulfonate sampling associated with Phase 3 of the MOU program. In addition, this subsection presents findings related to the supplemental data collection activities performed for remedial design purposes and the associated monitoring program between March 2010 and September 2013. The following subsections contain summaries of the findings for analytical data received after the September 2008 PSDR was submitted to the EPA. 4.1 SOIL AND SEDIMENT 4.1.1 On-Site Soil Analytical data for on-site soil sulfonate concentrations, including surface (0 to 6 inch bgs) and subsurface (1 to 1.5 ft bgs) soil samples in the FSIA Fields 5, 8C and 11, are summarized in Table 3-1 and Figure 3-1. PFOS concentrations were the highest among the three sulfonate analytes with some readings at ppm levels. On the basis of this additional characterization data, the areas associated with these sampling locations are in the process of being covered in the FSIA capping program (see Subsection 2.5). 4.1.2 MOU Phase 3 Off-Site Soil and Sediment at the WEEC Soil and sediment sulfonate data in the WEEC area were collected in June 2010 and are provided in Table 3-2 and Figure 3-2. 4-1 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014  PFOS concentrations were the highest detected sulfonate concentrations in the WEEC swamp area, followed by PFHS and PFBS, respectively. Generally, sulfonate concentrations detected in the WEEC upland soil (i.e., locations with the WEU prefix) were detected at lower concentrations than the WEEC swamp samples along each corresponding transect. PFBS in the WEEC soil/sediment ranged from 0.174 to 1.30 ppb. PFHS concentrations in the WEEC soil/sediment areas ranged from 0.400 to 5.30 ppb. PFOS concentrations in the WEEC soil/sediment ranged from 57.0 to 775 ppb. These concentrations are in the same general ranges as those found on-site in background areas. Detections of PFBS, PFHS and PFOS in on-site background areas ranged from 0.241 to 1.62 ppb, 0.271 to 1.40 ppb and 11.5 to 278 ppb, respectively. 4.1.3 Off-Site Soil Analytical data on off-site surface soil sulfonate concentrations within 2 to 3 miles of the 3M Decatur facility, including surface and subsurface soil samples collected during the off-site monitoring well installation, are summarized in Table 3-3 and Figure 3-3. At the off-site Phase 3 monitoring well locations, the highest PFBS, PFHS and PFOS concentrations in soil were generally found in the top 2 feet with decreasing concentrations with depth. PFOS concentrations were the highest of the sulfonate concentrations detected. PFBS, PFHS and PFOS were not detected in soil samples collected at and below 11 ft bgs. The highest PFOS soil concentrations were detected in the boring for monitor well 610S located southeast of the facility (<0.200 to 36.1 ppb). The detected PFOS concentrations for the remaining Phase 3 well locations (607R, 609R, 611R, MW-47 and MW-121) were at or below 24.0 ppb. PFBS and PFHS were also detected in the 610S soil boring samples at higher concentrations than in the other off-site monitoring wells. These detected PFOS concentrations from the Phase 3 off-site monitoring well locations were less than the detected PFOS concentrations in on-site background areas. PFOS concentrations in on-site background area surface soils ranged from 11.5 to 278 ppb, whereas detected PFOS concentrations in soil samples collected from the Phase 3 off-site monitoring well locations ranged from 9.08 to 36.1 ppb. 4.2 GROUNDWATER 4.2.1 Hydrogeology The hydrogeologic data collected during the Phase 3 activities, in conjunction with previous LOI, Phase 2 and supplemental assessment data, provide the basis for the hydrogeologic model 4-2 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 for the 3M Decatur facility, areas immediately surrounding the facility, and landfill facilities in the area. The water-bearing zones that are evident at and adjacent to the 3M Decatur, Alabama facility include (1) a residuum shallow water-bearing zone, also referred to as the water table, within this soil layer; (2) an epikarst middle water-bearing zone within the portion of bedrock that exhibits transitional weathering from completely weathered rock (i.e., saprolite residuum soil) to the underlying competent bedrock; and (3) a bedrock water-bearing zone within the fractures and solution cavities of the limestone bedrock. Hydrogeologic data indicate the preferred pathway for groundwater flow is associated with the base of the residuum and within the epikarst zone. Groundwater data indicate the contact between these hydrostratigraphic zones is transitional; however, due to the higher permeability exhibited within the zone, the epikarst zone is the most transmissive and is believed to be the preferred pathway for lateral groundwater flow. Generally, groundwater gradients on-site appear to mimic surface topography. Groundwater originates at an elevation high located in the northern portion of the FSIA (Field Nos. 6 and 9). From this area, groundwater in each of the groundwater zones flows radially in all directions. Additionally, groundwater elevations within the FSIA indicate restricted downward vertical movement between the three groundwater zones with vertical communication occurring only in localized areas. Off-site wells were installed as part of the Phase 2 and Phase 3 programs to monitor off-site groundwater conditions and to confirm the predicted groundwater flow directions from the site. These data were supplemented by additional groundwater data from local landfill sites and from monitoring on the BP property west of the 3M facility. The findings related to regional groundwater flow characteristics are as follows: In general, regional groundwater flow is northerly toward the Wheeler Reservoir. Similar to on-site residuum groundwater flow, the groundwater gradient for the residuum hydrostratigraphic zone mimics surface topography. 4-3 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014  Groundwater elevation data indicate that a trough in the groundwater surface occurs immediately southwest to south of the 3M property, which captures groundwater, conveys it to Bakers Creek and the Tennessee River, and restricts groundwater flow from the 3M property beyond this feature. Additional evidence that this feature acts as a hydraulic barrier is provided by the distribution of PFOS analytical data, which suggests capture of PFOS in groundwater from areas north of this convergence, directing the flow east toward Bakers Creek. In the residuum groundwater zone, a prominent groundwater elevation high under the FSIA causes groundwater in the residuum to flow radially in all directions. To the west, this flow converges with the flow from a second groundwater elevation high observed on the BP property and the regional groundwater flow from the south towards the Wheeler Reservoir, resulting in a line of groundwater convergence originating west of the FSIA and continuing south to east to north, surrounding the 3M property. This feature and the prominent northerly groundwater gradient south of the property act to restrict groundwater flow from the property to the south or west beyond the convergence figure. Residuum groundwater contours are provided in Figure 3-13. 4.2.2 On-Site Groundwater On-site groundwater sampling occurred quarterly from March 2010 through March 2013. The well locations and sulfonate analytical data are summarized in Tables 3-5 through 3-13. The latest round of groundwater results for the chemical plant area and the FSIA are shown in Figures 3-4 and 3-5, respectively. The groundwater sulfonate concentrations for the WWTP area extraction wells from June 2012 to June 2014 are shown in Figure 3-8. 4.2.2.1 Chemical Plant and Closed Landfill The highest PFBS concentrations in this area were detected in certain wells in the chemical plant area (310R, 330R, 330L and 335R), excluding extraction well RW312R and the GRS04 sample (see below). In September-October 2013, PFBS concentrations in these wells were at or above 1,240 ppb. All other wells sampled in September to October 2013 had concentrations at or below 430 ppb (Table 3-5). The highest PFHS concentrations in this area were detected in the residuum well 335R in the chemical plant area. In September-October 2013, the PFHS concentration in this well was 1,660 ppb. The PFHS concentrations in all other wells, excluding extraction well RW312R and the GRS04 sample (see below), were at or below 459 ppb (Table 3-6). The highest PFOS concentrations in this area were detected in the residuum well 335R in the chemical plant area. In September-October 2013, the PFOS concentration in this well was 6,480 ppb. The PFOS concentrations in the other wells, excluding 4-4 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 extraction wells RW312R and the GRS04 sample (see below), were at or below 832 ppb (Table 3-7). The highest PFBS, PFHS and PFOS concentrations are consistently detected in RW312R and GRS04. RW312R is the extraction well in the chemical plant area and GRS04 samples are composite samples of multiple maintenance pumping wells in the closed landfill area. Groundwater from the maintenance pumping wells and the chemical plant area is piped to an on-site GWTP and is effectively treated with GAC. The lowest sulfonate concentrations are found in bedrock well 317L in the chemical plant area. The highest sulfonate concentration detected in this well was PFOS detected at 2.44 ppb in March 2010. Concentrations of PFBS, PFHS and PFOS in this well are typically less than 1 ppb. 4.2.2.2 Former Sludge Incorporation Area Between June 2010 and March 2014, the highest PFBS concentrations were detected in residuum groundwater in Field 8b at the 135R well (ranging from 60.8 to 83.0 ppb) and in Field 9 at the 131R well (ranging from 36.6 to 81.2 ppb). PFBS concentrations in groundwater generally decrease with depth (i.e., residuum groundwater typically having the higher concentration) (Table 3-8). The highest PFHS concentrations, ranging from 720 to 844 ppb, were detected in residuum groundwater in Field 8b at the 135R well. Wells 131R in Field 9 and 134R in Field 8b have had somewhat lower levels, ranging from 182 to 413 ppb and 358 to 561 ppb, respectively. PFHS concentrations in groundwater generally decrease with depth (Table 3-9). The highest PFOS concentrations, ranging from 1,120 to 1,720 ppb, were detected in residuum groundwater in Field 9 at the 131R well. Wells 134R and 135R in Field 8b and CW26L in Field 6 have been observed with slightly lower levels, ranging from 943 to 1570 ppb, 892 to 1,470 ppb and 848 to 1,550 ppb, respectively. PFOS concentrations in groundwater generally decrease with depth (Table 3-10). The lowest PFOS concentrations generally occurred in Field 14 where no sludge was incorporated. In the Field 14 well cluster 137, PFBS, PFHS and PFOS concentrations were consistently among the lowest concentrations detected in each sampling event. The groundwater concentration results are generally consistent with the concentrations reported in the earlier PSDR. 4.2.2.3 Wastewater Treatment Plant (WWTP) Area Extraction Wells Sulfonate concentrations from groundwater extraction wells WW8R and WW9R have been generally consistent across the period of record. Sulfonate concentrations have generally been higher in WW8R compared to WW9R. PFOS has been detected at greater concentrations than PFBS and PFHS in these two wells. 4-5 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014  Concentrations in WW8R have ranged from 263 to 575 ppb, 1,160 to 2,610 ppb and 3,840 to 5,790 ppb for PFBS, PFHS and PFOS, respectively. Concentrations in WW9R have ranged from 184 to 341 ppb, 954 to 1,550 ppb and 2,550 to 5,420 ppb for PFBS, PFHS and PFOS, respectively. Concentrations in the two new WWTP area extraction wells WW10R and WW11R are similar, with maximum concentrations of 303, 1,120 and 3,890 ppb, respectively, for PFBS, PFHS and PFOS (Table 3-13). 4.2.3 Off-Site Groundwater The off-site groundwater analytical data are summarized in Tables 3-15 through 3-17 and provided in Figure 3-9. The findings of the off-site groundwater monitoring are as follows: Off-site groundwater PFBS, PFHS and PFOS concentrations for the March and April 2012 sampling event were generally consistent with previous sampling events, In April 2012, the highest sulfonate concentrations detected in off-site wells were PFBS detected in bedrock well 604L at 0.449 ppb, PFHS detected in bedrock well 602L at 0.252 ppb and PFOS detected in residuum well 604R at 1.12 ppb. PFBS and PFHS concentrations at the off-site wells were one to three orders-of-magnitude lower than the on-site groundwater concentrations, and PFOS concentrations at the off-site wells were one to two orders-of-magnitude lower than the on-site groundwater concentrations. The highest PFBS concentrations were generally detected in the residuum/epikarst groundwater monitoring samples from the off-site well clusters with the exception of the 604 and 610 well clusters located southeast of the facility where the bedrock well concentrations were higher. The highest PFHS concentrations were detected in the bedrock groundwater monitoring samples from the off-site well clusters with the exception of the 604 wells located directly east of the facility and Bakers Creek and the 603 wells located southwest of the facility where levels were approximately the same. The highest PFOS concentrations were detected in bedrock monitoring in the off-site well clusters with the exception of the 604 (both rounds) and 611 (March 2012 round only) well clusters located directly east of the facility and Bakers Creek and the 603 well clusters located southwest of the facility. 4-6 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 4.2.4 Phase 3 Assessment of Off-Site Regional Waste Disposal Facilities As part of Phase 3 MOU activities, groundwater samples were collected from selected monitoring wells at three off-site disposal facilities that were identified to have received wastes from the 3M Decatur facility that could contain sulfonates. It should be noted that there are no known downgradient receptors for groundwater downgradient of the three off-site disposal facilities (see Subsection 3.2.4). Analytical data for the groundwater samples collected at these facilities are summarized in Tables 3-18, 3-19 and 3-20 and Figures 3-10, 3-16 and 3-17. Morgan County Landfill The highest PFBS, PFHS and PFOS concentrations were detected in the downgradient wells at well clusters MW1 and MW2. In November 2010, the highest PFOS concentration was 14.8 ppb in MW2B (bedrock well), whereas the highest PFBS and PFHS concentrations were 2.26 and 3.28 ppb, respectively, in MW1B (bedrock well). In November 2010, PFBS and PFHS were detected at low concentrations at MW13, the upgradient control well. PFBS was detected in the residuum, epikarst and bedrock wells at 0.0957, 0.0843 and 0.0987 ppb, respectively. PFHS was detected in the residuum, epikarst and bedrock wells at 0.0559, 0.0526 and 0.0717 ppb, respectively. PFOS was non-detect in the MW13 well cluster in November 2010. MW13 was sampled again in April 2012 and, other than a detection of PFOS at 0.0376 ppb in the bedrock well, produced similar results. Based upon a review of documents related to the site, obtained from an ADEM file search, groundwater gradient data indicate a north to northeast groundwater flow direction at the site. BFI Morris Farm Landfill The highest PFBS concentration detected at the BFI Morris Farm landfill was 5.03 ppb at MW13D (bedrock well). The highest PFHS and PFOS concentrations detected at the BFI Morris Farm landfill wells were 12.8 ppb and 22.5 ppb, respectively, at the downgradient MW04 residuum well. At the upgradient monitoring location, PFBS, PFHS and PFOS were present at concentrations less than 0.25 ppb in the MW10 residuum well. Only PFHS was detected at 0.0281 in the W10D bedrock well. Based upon a review of documents related to the site, obtained from an ADEM file search, groundwater gradient data indicate an easterly groundwater flow direction at the site. 4-7 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 Browns Ferry Road Site The highest PFBS and PFHS concentrations in the BFRS groundwater were 3.91 ppb and 19.6 ppb, respectively, at the downgradient MW3R residuum well in August 2013. The highest PFOS concentration in the BFRS groundwater was 25.1 ppb at the downgradient MW7R residuum well in August 2013. At the upgradient location, PFBS was detected at a concentration of 0.0269 ppb in only the October 2012 sample from the MW9R residuum well. PFHS was at or below 0.0848 ppb in the MW9R residuum in groundwater and not detected in bedrock groundwater. The highest PFOS concentrations at the MW9 cluster were 0.214 ppb in residuum groundwater and 0.0445 ppb in bedrock groundwater. Based upon groundwater level measurements taken at the site, it is noted that the groundwater gradient is to the northeast at the site. 4.3 FISH SAMPLING The following subsections summarize the findings from the 2012 fish sampling in the Tennessee River. Sulfonate analytical data from the fish tissue sampling are summarized on Table 3-21 and Figure 3-18 for the April 2012 study and on Table 3-23 and 3-20 through 3-22 for the Fall 2012 study. April 2012 PFOS was detected in every fish specimen collected in the April 2012 sampling event. The median filet tissue PFOS concentrations were 624 ppb, 1,930 ppb and 979 ppb in the upper, middle and lower reaches of the confluence area where Bakers Creek flows into the Tennessee River, respectively. A detailed analysis of PFOS concentrations in fish tissue samples from the April 2012 sampling of fish tissue in Bakers Creek is provided in Appendix B. Fall 2012 PFBS was infrequently detected in largemouth bass and channel catfish filet tissue samples from the November 2012 sampling event. Of the 150 specimens sampled, PFBS was detected in 12 of the 75 largemouth bass samples and 17 of the 75 channel catfish samples. The highest filet tissue PFBS concentrations were 2.21 (2.04-duplicate) ppb in a largemouth bass sample from Reach 05 (Mouth of Bakers Creek) and 3.02 ppb in a channel catfish sample from Reach 11 (Mouth of Mallard Creek). 4-8 \\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014  PFHS was generally not detected in largemouth bass and channel catfish filet tissue in the November 2012 sampling event. Of the 150 specimens sampled, PFHS was detected in 4 of the 75 largemouth bass samples and 1 of the 75 channel catfish samples. The highest PFHS concentration in a largemouth bass tissue sample was 0.783 (<0.893-duplicate) ppb in Reach 05 (Mouth of Bakers Creek). The only channel catfish PFHS detection was 1.54 ppb in Reach 09 (Mouth of Fox Creek). PFOS was detected in every fish specimen collected in the November 2012 sampling event. The median filet tissue PFOS concentrations ranged from 25.7 ppb in Reach 03 (backwater area at RM 307.5) to 435 ppb in Reach 05 (Mouth of Bakers Creek). Median catfish filet tissue PFOS concentrations ranged from 1.50 ppb in Reach 01 (RM 320) to 283 ppb in Reach 05 (Mouth of Bakers Creek). For both species of fish evaluated, the highest median PFOS concentrations occurred along the industrialized southern shoreline in the immediate vicinity of the City of Decatur. A detailed analysis of PFOS concentrations in fish tissue samples from this stretch of the Tennessee River indicates that PFOS concentrations have been declining since the early 2000s (WESTON, 2013e). 4.4 SURFACE WATER The analytical data on surface concentrations in the Wheeler and Wilson Reservoirs of the Tennessee River from the 2012 surface water sampling events are summarized in Table 3-22 and Figure 3-19 for the April 2012 study and in Tables 3-24 and 3-25 and Figures 3-23 and 3-24 for the Fall 2012 study. April 2012 Surface Water PFOS concentrations for single samples collected in the lower, middle and upper reaches of the confluence area where Bakers Creek flows into the Tennessee River were 0.450, 0.691 and 0.0237 ppb, respectively. Fall 2012 Surface Water Transects Sulfonate concentrations from surface water transect sampling suggest bank-attached flow with slow mixing downriver. The highest sulfonate concentrations and the principal sources of PFOS enter the river along the industrialized southern shoreline in the vicinity of the City of Decatur. Upstream of the 3M Decatur facility, surface water PFBS and PFHS concentrations are typically non-detect and PFOS concentrations range from 0.006 to 0.020 ppb, with a median concentration of 0.007 ppb. 4-9 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014  The PFOS concentrations were the highest of the three sulfonates analyzed from the Tennessee River surface water samples in fall 2012. The PFOS concentrations in the surface water samples ranged from 0.00611 ppb in the middle of Transect 3 (at the confluence of Betty Rye Creek and Dry Branch with the Tennessee River at RM 303) to 0.138 ppb at the southernmost point along Transect 4 (closest location to Bakers Creek mouth at RM 301). The PFOS results for Transect 1, the farthest upstream transect, are consistent across the river's width and ranged from 0.00613 to 0.00689 ppb with a median PFOS concentration of 0.00653 ppb. For the area in this study, these transect results establish the upstream background levels in surface water. A detailed analysis of the surface water trends since the early 2000s indicates generally declining levels of PFOS in the surface water (WESTON, 2013e). Fall 2012 Fish Sampling Reach Surface Water Sulfonate concentrations detected in the surface water samples collected within the individual fish sampling reaches were generally consistent with concentrations at the associated surface water transect sampling nodes. PFOS concentrations were the highest sulfonate concentrations detected and ranged from 0.00639 ppb in Reach 03 (in the backwater area across from Point Mallard at RM 307.5) to 0.385 ppb in Reach 05 (Bakers Creek mouth at RM 301). 4.5 CHARACTERIZATION ACTIVITIES IN SUPPORT OF REMEDIAL DESIGN Sulfonate samples were voluntarily collected by 3M in conjunction with non-MOU supplemental activities as well as those previously described. These non-MOU supplemental activities are primarily associated with on-site remediation efforts and a separate off-site assessment program. Areas where specific PFC mitigation measures are proposed, underway or already completed on-site are identified in Table 4-1. Figure 4-1 shows the locations of the identified areas. In Table 4-1, the primary media affected by the respective remedial actions taken are listed. In addition to mass removal or isolation of PFC-containing material in these locations, secondary benefits are also anticipated. For example, removal of PFC-containing soil and sediment from drainageways is expected to result in a corresponding decline in PFC concentrations in drainageway surface water and, thus, reductions in releases to surface water features. 4-10 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 4.5.1 Avenue A Drainageway 3M conducted assessment activities in areas that are upgradient to the Avenue A drainageway in June and July 2010 and in January 2011 to identify potential sources for the PFOA that was detected in the Avenue A drainageway during MOU Phase 2 monitoring. The results of these supplemental assessments are summarized in Tables 3-26 through 3-28 and Figures 3-26 through 3-28 and are discussed below: In June and July 2010, PFBS concentrations ranged from 2.59 to 447 ppb in the shallow residuum groundwater and from 0.764 to 279 ppb in surface water. PFHS ranged from 7.63 to 420 ppb in the shallow groundwater and from 3.68 to 1,130 ppb in surface water. PFOS ranged from 17.5 to 1,780 ppb in the shallow groundwater and from 104 to 850 ppb in surface water. For PFBS, PFHS and PFOS, the highest concentrations in shallow groundwater were detected north and west of the closed landfill at locations GP10 and GP11 and near the Fire Training Area (FTA) at locations GP07 and GP08. The highest sulfonate concentrations in surface water were detected in the on-site marsh area west of the closed landfill and in a drainage feature north of the closed landfill. In supplemental groundwater samples collected in the western marsh area and at well 210R adjacent to the FTA in January 2011, sulfonate concentrations in the 210R residuum well had the highest sulfonate concentrations with 43.2 ppb PFBS, 309 ppb PFHS and 539 ppb PFOS. In the January 2011 soil and sediment samples, the highest PFBS concentrations were detected in soil samples collected from the marsh to the west of the closed landfill (19.7 to 35 ppb; SS25). With the exception of the SS25 location, PFBS concentrations in sediment samples collected in the marsh to the west of the closed landfill were greater than the adjacent soil PFBS concentrations. Median PFBS concentrations were 8.2 ppb in sediment and 1.2 ppb in soil. In the January 2011 soil and sediment samples, the highest PFHS concentrations occurred in soil and sediment samples collected from the marsh to the west of the closed landfill. The highest concentration of PFHS was detected in a surface soil sample from the area west of the closed landfill (SS25) at 607 ppb. 4-11 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014  In the January 2011 soil and sediment samples, the highest PFOS concentrations were present in soil and sediment samples collected from the marsh to the west of the closed landfill. However, two locations in the vicinity of the FTA (SS10 and SS12) had PFOS concentrations comparable to those in the marsh area. The highest concentration of PFOS in the marsh area samples was 4,060 ppb in the 0- to 0.5-foot depth interval sample at location SD22, and the highest PFOA concentration in the FTA samples was 5,830 ppb in the 0.5- to 1-foot depth interval sample at location SS12. Although PFOS concentrations in the FTA were generally less than 500 ppb, the majority of the samples in the marsh area had PFOS concentrations greater than 500 ppb. After completion of the sampling activities described above, 3M developed a work plan to remove soil from the FTA to a depth of 1 to 2 ft bgs followed by surface restoration. The soil removal project commenced in June 2012 with ADEM's approval and was completed in August 2012. Excavated soil was placed under the FSIA cap. Based on the results of the Avenue A characterization program, 3M is undertaking capping and dredging activities in the Avenue A drainageway area with projected completion in 2016. 4.5.2 On-Site Soil Sampling Adjacent to FSIA Field 6 A supplemental assessment was performed in December 2012 at three locations in an area to the east of FSIA Field 6 to determine whether any remedial response actions should be considered for this area. Soil samples were collected in this wedge of land next to the existing railroad spur to assess needs and options for remediating the area. The supplemental activities were not included in the Phase 3 Work Plan scope but are described in Subsection 3.5.2. The results of these supplemental assessments are summarized in Table 3-29 and Figure 3-29 and are discussed below: PFBS concentrations in surface soil ranged from 0.373 to 0.423 ppb in the 0 to 0.5 ft bgs sampling intervals and from 1.67 to 64.8 ppb in the 5 to 5.5 ft bgs sampling intervals. PFHS concentrations in surface soil ranged from 3.56 to 33.3 ppb in the 0 to 0.5 ft bgs sampling intervals and from 5.04 to 270 ppb in the 5 to 5.5 ft bgs sampling intervals. PFOS concentrations in surface soil collected from these three locations ranged from 112 to 3,890 ppb in the 0 to 0.5 ft bgs sampling intervals and from 3.86 to 1,730 ppb in the 5 to 5.5 ft bgs sampling intervals. 4-12 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 As a result of this sampling, soils from this area will be excavated and placed under the cap as part of the FSIA capping program. 4.5.3 Browns Ferry Road Site Supplemental assessments were performed in February 2012, October 2012 and August 2013 at the BFRS. The results of these additional characterization activities are summarized in Tables 3 30 and 3-31 and Figures 3-30 and 3-31. On-site surface water sulfonate concentrations in samples collected in February 2012, October 2012 and August 2013 were generally consistent between sampling events. The only exception was the PFOS levels at ET04 (the northernmost sampling location in the eastern tributary), which were 4.30 ppb in February 2012, 0.200 ppb in October 2012 and 0.109 ppb in August 2013. Between October 2012 and August 2013, PFBS concentrations ranged from <0.0250 to 0.115 ppb, and PFHS concentrations ranged from <0.250 to 0.232 ppb in surface water samples. Excluding the 4.30 ppb PFOS detected in ET04 in February 2012, PFOS concentrations ranged from <0.0250 to 0.303 ppb at locations within or downstream of the BFRS. At the off-site cross-gradient Dry Creek sample location, the PFOS concentration was 1.54 ppb. PFBS and PFOS concentrations in surface water samples collected from off-site locations downgradient of the site (i.e., ET05 and WT01) in October 2012 were approximately equal to or lower than concentrations at on-site surface water sampling locations. PFHS concentrations at the off-site eastern tributary and western tributary sampling locations (approximately 0.07 ppb) were higher than those at the upstream on-site sampling locations (approximately 0.04 ppb). On-site sediment PFBS concentrations from the February 2012 sampling event ranged from 3.95 (ET01) to 23.8 ppb (ET04). PFHS and PFOS were not detected in any of the February 2012 sediment samples. 4-13 J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 SECTION 4 FIGURES J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 BP Property Plant Chemical Plant Goose Pond Avenue A D itc h Marsh West of Closed Landfill Closed Landfill Tennessee River/ W heeler Reservoir W astewater T reatm en t Plant Area irth of .a n d fill Former Sludge Basins (Closed) W E E C /O ff-S ite Pond/Marsh Wetlands Edge Enviromental Center (WEEC) Field 13 Field 9 Norfolk Southern Rai Field Field Field 10 Field Former ' .1 leld * Field 8.ai t Sludge Incorp oration Field 11 rea Field 5 HTS Field 14 Highway 20/72 Field 8c Legend: iT .'.i 1=1 B uilding s D aikin P roperty 3M Decatur P roperty B oundary 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 3M Decatur, A L Facility SECTION 4 TABLES J:\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report,docx 9/18/2014 Table 4-1 Site Features and NPDES Remedial Action Agreement Mitigation Areas 3M Decatur, AL Facility Location Media Description Time Period F o rm e r S lu d g e In co rp o ra tio n A re a S oil W EEC Pond S e d im e n t / S oil F ire T ra in in g A re a S oil C a p p in g o f F S IA fie ld s w ith F M L a n d soil. R e v e g e ta te p e r E & S re q u ire m e n ts 2 0 0 8 - O n g o in g R e m o v e to p 3 fe e t o f se d im e n t. R e p la c e re m o v e d s e d im e n ts w ith c le a n fill. L in e p o n d w ith F M L. P la c e s e d im e n ts u n d e r F S IA m u ltila y e r cap. 2008 - 2009 R e m o v e soil, b a c k fill/s u rfa c e re s to ra tio n . P la c e e x c a v a te d so ils u n d e r F S IA m u ltila y e r cap. 2012 Status O n g o in g C o m p le te d C o m p le te d W W T P A rea G ro u n d w a te r In sta ll re c o v e ry w e lls an d ro u te g ro u n d w a te r to e x is tin g g ro u n d w a te r tre a tm e n t p la n t 2012 - 2013 In sta lla tio n co m p le te , s y s te m o p e ra tin g N o rth o f C lo se d L a n d fill S e d im e n t / S oil In s ta lla tio n o f F M L, soil ca p to is o la te so ils / s e d im e n t fro m s to rm w a te r ru n o ff a n d in s ta ll g ro u n d w a te r e x tra c tio n w e lls 2013 - 2014 O n g o in g M a rsh w e s t o f C lo se d L a n d fill S e d im e n t C o n s tru c t soil ca p an d s to rm w a te r d iv e rs io n to iso la te s to rm w a te r ru n -o ff fro m s e d im e n ts 2013 - 2014 O n g o in g A v e n u e A d ra in a g e w a y S e d im e n t Notes: E&S = Erosion and Sedim entation FSIA = Form er Sludge Incorporation Area FM L = Flexible M em brane Liner W E E C - W etlands Edge E nvironm ental C enter W W T P = w astew ater treatm ent plant R e m o v e s e d im e n ts fro m d itch as p a rt o f d itch m a in te n a n c e ; p la ce u n d e r F S IA m u ltila y e r cap 2014 To Be C o m p le te d J:\3M -D E C A T \2 01 3 Su lfo n ate s Report\Final (Septem ber 2014)\Tables\ Table_4-1_Site_A ctivities.xls Page 1 of 1 5. REFERENCES ADEM (State of Alabama Department of Environmental Management). 2008. NPDES Remedial Action Agreement Between Alabama Department ofEnvironmentalManagement and 3M Company. NPDES Permit No. AL 0000205. Montgomery County, AL. June27, 2008. EPA (U.S. Environmental Protection Agency). 2004. Memorandum o f Understanding between the U.S. Environmental Protection Agency and 3M Company and Dyneon LLC for a Perfluorooctanoic Acid (PFOA) Site-Related Environmental Assessment Program. Effective October 25, 2004. PCG (Peer Consultation Group). 2008. Report o f the Peer Consultationfor a PFOA Site-Related Environmental Assessment Programfor 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 Reportfor the 3M and Dyneon LLC Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by Weston Solutions, Inc. for the 3M Company. January 2007. WESTON (Weston Solutions, Inc.). 2008a. Data Assessment Report for the 3M Decatur, Alabama Facility PFOA Site-Related Environmental Monitoring Program. Prepared by Weston Solutions, Inc. for the 3M Company, January 2008. WESTON (Weston Solutions, Inc.). 2008b. Screening Level Human Exposure Assessment Report for the 3M Decatur, Alabama Facility PFOA Site-Related Environmental Monitoring Program. Prepared by Weston Solutions, Inc. for the 3M Company, January 2008. WESTON (Weston Solutions, Inc.). 2008c. Future Data Needs Assessment Report for the 3M Decatur, Alabama Facility PFOA Site-Related Environmental Monitoring Program. Prepared by Weston Solutions, Inc. for the 3M Company, January 2008. WESTON (Weston Solutions, Inc.). 2008d. Status Report. Perfluorooctanoic Acid (PFOA) Site Related Assessment Program. Prepared by Weston Solutions, Inc. for the 3M Company, August 2008. WESTON (Weston Solutions, Inc.). 2008e. Perfluorinated Sulfonates Data Report for the 3M Decatur, Alabama Facility Site-Related Environmental Monitoring Program. Prepared by Weston Solutions, Inc. for the 3M Company, September 2008. WESTON (Weston Solutions, Inc.). 2009. Phase 3 Work Plan. 3M Decatur Facility PFOA SiteRelated Environmental Monitoring Program. Prepared by Weston Solutions, Inc. for the 3M Company, July 2009. 5-1 \\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014 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 o f 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 o f the Phase 3 Off-Site Groundwater Monitoring Program. Prepared by Weston Solutions, Inc. for the 3M Company, September 2012. 5-2 \\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014 WESTON (Weston Solutions, Inc.). 2012e. September 30, 2012. Quarterly Status Report. Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by Weston Solutions, Inc. for the 3M Company, September 30, 2012. WESTON (Weston Solutions, Inc.). 2012f. October 2012. Revised Work Plan for the Fall 2012 Fish and Surface Water Sampling in the Tennessee River. Prepared by Weston Solutions, Inc. for the 3M Company, October 2012. WESTON (Weston Solutions, Inc.). 2012g. December 31, 2012. Quarterly Status Report. Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by Weston Solutions, Inc. for the 3M Company, December 31, 2012. WESTON (Weston Solutions, Inc.). 2013a. March 31, 2013. Quarterly Status Report. Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by Weston Solutions, Inc. for the 3M Company, March 31, 2013. WESTON (Weston Solutions, Inc.). 2013b. Tennessee River Perfluorochemical (PFC) Assessment, and Surface Water Sampling Report, October - December 2012. Prepared by Weston Solutions, Inc. for the 3M Company. June. WESTON (Weston Solutions, Inc.). 2013c. June 30, 2013. Quarterly Status Report. Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by Weston Solutions, Inc. for the 3M Company, June 30, 2013. WESTON (Weston Solutions, Inc.). 2013d. September 30, 2013. Quarterly Status Report. Perfluorooctanoic Acid (PFOA) Site Related Environmental Assessment Program. Prepared by Weston Solutions, Inc. for the 3M Company, September 30, 2013. WESTON (Weston Solutions, Inc.), 2013e. Addendum to the Data Assessment Reportfor the 3M Decatur, Alabama Facility. Prepared by Weston Solutions, Inc. for the 3M Company, November 2013. 5-3 \\weston\natacc\FOLDERS.0-9\3M-DECAT\2013 Sulfonates Report\Final (September 2014)\Sulfonates Report.docx 9/18/2014 APPENDIX A LABORATORY DATA PACKAGES R:\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 PACKAGES R:\FOLDERS.0-9\3M-DECAT\2013 SULFONATES REPORT\FINAL (SEPTEMBER 2014)\SULFONATES_APPENDIXBREAKERS_ALL.DOCX 9/18/2014 APPENDIX A-2 ISO REPORT DATA PACKAGES R:\FOLDERS.0-9\3M-DECAT\2013 SULFONATES REPORT\FINAL (SEPTEMBER 2014)\SULFONATES_APPENDIXBREAKERS_ALL.DOCX 9/18/2014 APPENDIX A-3 THIRD-PARTY (AXYS ANALYTICAL) DATA PACKAGES R:\FOLDERS.0-9\3M-DECAT\2013 SULFONATES REPORT\FINAL (SEPTEMBER 2014)\SULFONATES_APPENDIXBREAKERS_ALL.DOCX 9/18/2014 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) R:\FOLDERS.0-9\3M-DECAT\2013 SULFONATES REPORT\FINAL (SEPTEMBER 2014)\SULFONATES_APPENDIXBREAKERS_ALL.DOCX 9/18/2014 APPENDIX C TENNESSEE RIVER PERFLUOROCHEMICAL (PFC) ASSESSMENT FISH TISSUE AND SURFACE WATER SAMPLING REPORT OCTOBER - DECEMBER 2012 (WESTON, 2013e) R:\FOLDERS.0-9\3M-DECAT\2013 SULFONATES REPORT\FINAL (SEPTEMBER 2014)\SULFONATES_APPENDIXBREAKERS_ALL.DOCX 9/18/2014