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         REPORT

CMS Report (all sections)

           FIGURES

1-1  -  Location Map

2-1 -  Regional Location Map

2-2  -  Maine Yankee Property Boundaries

2-3  -  Map of Site Watersheds

2-4  -  Map of Plant Area Watersheds

2-5A - Soil Exposure Areas (Plant Area South)

2-5B - Soil Exposure Areas (Plant Area North)

3-1 -  Bailey Farmhouse Remediation Area

3-2 -  Planned and Proposed Remediation Areas

3-3 -   Warehouse 2/3 Soil Remediation Plan

3-4 -  Proposed Construction Transformer Soil Removal

3-5  -  Soil Removal Area MW-401B

3-6 -  Former Concrete Truck Maintenance Garage Geoprobe Study

3-7 -  Former Truck Maintenance Garage Remediation Area

3-8 -  Detailed Bedrock Groundwater Contour Map of WH 2/3 Area

3-9A - TCA and DCA Isocons Near WH 2/3

3-9B - TCA and DCE Isocons Near WH 2/3

3-9C - TCA and VC Isocons Near WH 2/3

3-10A - Iron Distribution in Soil Groundwater on Bailey Point

3-10B - Iron Distribution in Bedrock Groundwater on Bailey Point

3-11A -  Manganese Distribution in Soil Groundwater on Bailey Point

3-11B -  Manganese Distribution in Bedrock Groundwater on Bailey Point

3-12A -  Molybdenum Distribution in Soil Groundwater on Bailey Point

3-12B - Molybdenum Distribution in Bedrock Groundwater on Bailey Point

3-13A - Sodium Distribution in Soil Groundwater on Bailey Point

3-13B - Sodium Distribution in Bedrock Groundwater on Bailey Point

3-14 - DRO Distribution in Groundwater on Bailey Point

5-1 -  Proposed Soil Removal Areas-10 mg/kg DRO (Plant Area South)

5-2  -  Proposed Soil Removal Areas-10 mg/kg DRO (Plant Area North)

5-3 -  Conceptual Model Cross Sections

5-4  -  MY CMS Model – Layer 1 Boundary Conditions

5-5  -  MY CMS Model – Finite – Difference Grid

5-6 -  MY CMS Model – Layer 1 Hydraulic Conductivity, ft/day

5-7 -  MY CMS Model – Layer 2 Hydraulic Conductivity, ft/day

5-8  -  MY CMS Model – Layer 3 Hydraulic Conductivity, ft/day

5-9 -  MY CMS Model – Layer 4 Hydraulic Conductivity, ft/day

5-10 -  MY CMS Model – Layer 5 Hydraulic Conductivity, ft/day

5-11MY CMS Model – Recharge Rate, Feet per Day

5-12 -  Flow Model Calibration Head Comparisons

5-13 -  MY CMS Model – Layer 1 Source Area from Dredge Spoils

5-14a   -  Predicted Chloride v. Measured Chloride

5-14b - Measured Sodium v. Measured Chloride

5-14c - Measured Boron v. Measured Chloride

5-15 -  Measured Sodium Concentrations Compared to Changes at Knoll Well from Hypothetical Spill at Concrete Batch Plant in 1968

5-16a -  Sensitivity Analysis (A)

5-16b -  Sensitivity Analysis (B)

5-16c -  Sensitivity Analysis (C)

5-16d Sensitivity Analysis (D)

5-16e -  Sensitivity Analysis (E)

5-17 -  MY CMS Model – Phreatic Surface Contours

5-18 -  MY CMS Model – Layer 2 Groundwater Contours

5-19MY CMS Model – Layer 4 Groundwater Contours

5-20  -  MY CMS Model – Layer 5 Groundwater Contours

5-21 - MY CMS Model – Layer 7 Groundwater Contours

5-22 - MY CMS Model – Predicted Chloride Conc., mg/L, in 2103, Layer 1

5-23 - MY CMS Model – Predicted Chloride Conc., mg/L, in 2103, Layer 3

5-24 - MY CMS Model – Predicted Chloride Conc., mg/L, in 2103, Layer 4

5-25 - MY CMS Model – Predicted Chloride Conc., mg/L, in 2103, Layer 6

5-26 - Predicted Sodium Concentrations With Time North of the Knoll

5-27  - Predicted Boron Concentrations with Time North of the Knoll

5-28MY CMS Model – Predicted DRO Concentrations, 2013, Layer 1

5-29 - MY CMS Model – Predicted DRO Concentrations, 2013, Layer 2

5-30 - MY CMS Model – Predicted DRO Concentrations, 2013, Layer 4

5-31 - MY CMS Model – Predicted DRO Concentrations, 2013, Layer 6

5-32 - Predicted DRO Concentrations with Time, North of Knoll

5-33 - MY CMS Model – Layer 2 BTEX Concentrations 2014

5-34 - MY CMS Model – Layer 4 BTEX Concentrations 2014

5-35 - MY CMS Model – Layer 5 BTEX Concentrations 2014

5-36 - MY CMS Model – Layer 6 BTEX Concentrations 2014

5-37 - Predicted WH 2/3 BTEX Concentrations with Time

5-38 - DRO Concentrations in 2009, South End Bailey Pt., Layer 1

5-39 - DRO Concentrations in 2009, South End Bailey Pt., Layer 4

5-40 - DRO Concentrations in 2009, South End Bailey Pt., Layer 6

5-41 - MY CMS Model-Layer 4 Isocons for TCA Plume Generation of 20 Years (assumes a small source area of strength 1000,conservative tracer)

5-42 - MY CMS Model-Layer 4 Total Isocons for TCA Plume Generation for 20 Years with Biodegradation

5-43 - MY CMS Model-Layer 4 Total VOC Isocons, ug/L in 2013 with Biodegradation

5-44 - Location of Pump & Treat Extraction and Infiltration Elements

       TABLES

2-1Summary of Storm Drain Outfalls

2-2 -  Summary of Previous Investigations and Remediations

3-1 -  Fate and Transport Properties for Selected Organic Compounds

3-2 -  Natural Attenuation Parameters from Selected Monitoring Wells

3-3  -  Summary of DRO Impacted Areas

4-1 - General Response Actions and Identification of Potential Technologies for Groundwater Remediation

4-2 -  Groundwater Remedial Technology Screening

4-3 -  Components of the Groundwater Remedial Alternatives

4-4 -  Criteria for Initial Screening of Alternatives

4-5 -  Screening of Soil Remedial Alternatives Alternative Soil-1 No Further Action/Institutional Controls

4-6 -  Screening of Soil Remedial Alternatives Alternative Soil-2 Soil Excavation and Offsite Disposal

4-7 - Screening of Groundwater Remedial Alternatives Alternative GW-1 No Further Action/Institutional Controls

4-8 -  Screening of Groundwater Remedial Alternatives Alternative GW-2 Long-Term Monitoring/Institutional Controls

4-9 -  Screening of Groundwater Remedial Alternatives Alternative GW-3 Groundwater Extraction and Treat/Institutional Controls

5-1 -  Detailed Analysis of Soil Alternatives

5-2 -  Cost Estimate Alternative Soil-1

5-3 -  Cost Estimate Alternative Soil-2

5-4 -   Comparative Analysis of Soil Alternatives

5-5Calibrated Hydraulic Conductivity Zones in Model

5-6 -  Model-Calibrated Recharge Rates

5-7 -  Porosity and Dispersity

5-8 - Flow Model Calibration Statistics

5-9 - Detailed Analysis of Groundwater Alternatives

5-10 - Cost Estimate Alternative GW-1

5-11- Cost Estimate Alternative GW-2

5-12 - Cost Estimate Alternative GW-3

5-13 - Comparative Analysis of Groundwater Alternatives

              APPENDICES 

appendix A - Outfall 009 Closure Report

appendix B - Forebay Confirmatory Sediment Sampling Results

appendix C - Remediation Plan and Remediation Report for Contaminated Soils at Warehouse 2/3

appendix D - Remediation Report for MW-401B Area

appendix E - Soil Sampling Results and Remediation Report for Former Truck Maintenance Garage

appendix F -  Cost Backup Information

APPENDIX G - MY RCRA Long-Term Groundwater Monitoring Program

APPENDIX H - CMS Confirmatory Data