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Home My WebLink AboutNC0004987_MSS_Appendix L_20191231Corrective Action Plan Update December 2019 Marshall Steam Station APPENDIX L SUSTAINABILITY CALCULATIONS SynTerra APPENDIX L - SUSTAINABILITY CALCULATIONS REMEDIAL ALTERNATIVES - INPUTS CORRECTIVE ACTION PLAN UPDATE MARSHALL STEAM STATION DUKE ENERGY CAROLINAS LLC, TERRELL, NC Alternative Remedial Alternative 1 - Groundwater Remediation by MNA Remedial Alternative 2 — Groundwater Remediation by Extraction, Clean Water Infiltration, and In -Situ Treatment Remedial Alternative 3 — Groundwater Remediation by Extraction and Clean Water Infiltration New Monitoring Wells Number of MWs 12 12 12 Average depth of MWs (ft. bgs) 80 80 80 Average screen length of MWs (ft.) 10 10 10 Casing material Sch 80 PVC Sch 80 PVC Sch 80 PVC Well diameter 6 6 6 Borehole diameter 8 8 8 Extraction Wells Number of Extraction Wells 53 66 Average depth (ft. bgs) 181 162 Average screen length (ft.) 15 15 Total flow (gpm) 608 652 Casing material Sch 80 PVC Sch 80 PVC Well diameter 6 6 Borehole diameter 8 8 Horizontal Wells Number of Horizontal Wells Length of Each Horizontal Well (ft.) Total flow (gpm) Casing material Well diameter Borehole diameter Clean Water Infiltration Wells Number of Clean Water Infiltration Wells 24 Average depth (ft. bgs) 60 Average screen length (ft.) 15 Total flow (gpm) 286 Casing material Sch 80 PVC Well diameter 6 Borehole diameter 8 Number of pumps 1 Infiltration Galleries Number of Infiltration Galleries 1 Total area (acres) 7 Total flow (gpm) 46 Pipe material Sch 40 PVC Pipe diameter 1 Chemical Injection Wells Number of Injection Wells Average depth (ft. bgs) Average screen length (ft.) Total flow (gpm) Casing material Well diameter Borehole diameter Injection Pumps Tree Wells Total area (acres) Trenches Number of trenches 1* Length (ft.) 1400 Width (ft.) 15 De th ft. 24 Page 1 of 2 APPENDIX L - SUSTAINABILITY CALCULATIONS REMEDIAL ALTERNATIVES - INPUTS CORRECTIVE ACTION PLAN UPDATE MARSHALL STEAM STATION DUKE ENERGY CAROLINAS LLC, TERRELL, NC Alternative Remedial Alternative 1 - Groundwater Remediation by MNA Remedial Alternative 2 - Groundwater Remediation by Extraction, Clean Water Infiltration, and In -Situ Treatment Remedial Alternative 3 - Groundwater Remediation by Extraction and Clean Water Infiltration Conveyance Pipe Pipe length 5400 12300 Pipe material Sch 80 HDPE Sch 80 HDPE Pipe diameter 6 6 Number of conveyance pumps 4 4 Permeable Reactive Barriers Number of PRBs Fill Material Length (ft.) Width (ft.) Depth (ft.) Removal of Waste Materials Tons of waste Waste Profile Treatment Media Media Medium Impact Material Pounds 123000 Well Abandonment Number of wells Average well depth Well diameter Fill Material Laboratory Analysis $ of laboratory analysis spent Length of Active Remediation Years of Active Remediation 0 30 9 Prepared By: GTC Checked By: WCG Notes: * - Remedial Alternative does not include a trench but the trench represents the equipment needs to construct the In -Situ amendment placements ft. - foot gpm - gallon per minute Sch - schedule HDPE - high density polyethylene bgs - below ground surface PVC - polyvinyl chloride PRB - permeable reactive barrier MW - monitoring wells MNA - monitored natural attenuation Page 2 of 2 APPENDIX L - SUSTAINABILITY CALCULATIONS REMEDIAL ALTERNATIVES - SUSTAINABILITY CORRECTIVE ACTION PLAN UPDATE MARSHALL STEAM STATION DUKE ENERGY CAROLINAS LLC, TERRELL, NC Remedial Alternative 1 - Groundwater Remediation by MNA Activities CO2 Emissions Percent Total Onsite NOx Emissions percent Total Onsite SOX Emissions Percent Total Onsite PM 10 Emissions percent Total Total NOx Emissions Percent Total Total SOX Emissions Percent Total Total PM 10 Emissions percent Total Total Energy Used Total Energy Used percent Total metric ton % metric ton % metric ton % metric ton % metric ton % metric ton % metric ton % MMBTU MWH Material Productions 75.49 78.18 NA - NA - NA - 3.5E-02 17.6 5.5E-02 73.0 7.9E-03 35.1 2.3E+04 NA 98.86 Transportation -Personnel 5.05 5.23 NA - NA - NA - 1.1E-02 5.3 1.0E-03 1.4 1.7E-04 0.7 6.6E+01 NA 0.3 Transportation-Equip/materials 0.49 0.51 NA - NA - NA - 1.5E-04 0.1 2.7E-06 0.0 1.4E-05 0.1 6.4E+00 NA 0.0 Equipment Use and Misc 15.26 15.80 1.5E-01 100.0 1.5E-02 100.0 1.3E-02 100.0 1.5E-01 76.9 1.9E-02 25.7 1.4E-02 64.0 1.8E+02 0.0E+00 0.8 Residual Handling 0.27 0.28 0.0E+00 - 0.0E+00 - 0.0E+00 - 8.8E-05 0.0 3.6E-06 0.0 7.2E-06 0.0 3.8E+00 NA 0.0 Total 96.56 100 1.46E-01 1 100.0 1.49E-02 100 1.31E-02 100 2.00E-01 100 7.50E-02 100 2.24E-02 100 2.29E+04 0.00E+00 100 Remedial Alternative 2 - Groundwater Remediation by Extraction, Clean Water Infiltration, and In -Situ Treatment Activities CO2 Emissions Percent Total OnO NO Emissions percent Total Onsite SOX Emissions Percent Total Onsite PM10 Emissions percent Total Total NOx Emissions Percent Total Total SOX Emissions Percent Total Total PM10 Emissions Percent Total Total Energy Used Total Energy Used percent Total metric ton % metric ton % metric ton % metric ton % metric ton % metric ton % metric ton % MMBTU MWH No Material Productions 45,368.11 68.32 NA NA NA 1.1E+02 59.9 1.1E+02 62.4 2.1E+01 62.7 3.9E+07 NA 99.60 Transportation -Personnel 11.91 0.02 NA NA NA 1.3E-02 0.0 1.1E-03 0.0 6.8E-04 0.0 1.5E+02 NA 0.0 Transportation-Equip/materials 0.98 0.00 NA - NA - NA 3.1E-04 0.0 5.5E-06 0.0 2.7E-05 0.0 1.3E+01 NA 0.0 Equipment Use and Misc 21,028.80 31.67 1.9E+00 100.0 1.4E-01 100.0 1.1E-01 100.0 7.5E+01 40.1 6.7E+01 37.6 1.3E+01 37.3 1.5E+05 3.1E-01 0.4 Residual Handling 0.27 0.00 0.0E+00 0.0E+00 0.0E+00 8.8E-05 0.0 3.6E-06 0.0 7.2E-06 0.0 3.8E+00 NA 0.0 Total 66,410.07 100 1.90E+00 100.0 1.37E-01 100 1.10E-01 100 1.87E+02 100 1.79E+02 100 3.43E+01 100 3.87E+07 3.05E-01 100 Remedial Alternative 3 - Groundwater Remediation by Extraction and Clean Water Infiltration Activities CO2 Emissions Percent Total Onsite NOx Emissions percent Total Onsite SOX Emissions Percent Total Onsite PM10 Emissions percent Total Total NOx Emissions Percent Total Total SOX Emissions Percent Total Total PM10 Emissions percent Total Total Energy Used Total Energy Used percent Total metric ton % metric ton % metric ton % metric ton % metric ton % metric ton % metric ton % MMBTU MWH Material Productions 1,997.11 17.02 NA - NA - NA - 5.8E+00 14.7 3.5E+00 12.1 1.3E+00 9.3 4.2E+06 NA 98.48 Transportation -Personnel 12.25 0.10 NA - NA - NA - 1.3E-02 0.0 1.1E-03 0.0 7.1E-04 0.0 1.6E+02 NA 0.0 Transportation-Equip/materials 0.98 0.01 NA - NA - NA - 3.1E-04 0.0 5.5E-06 0.0 2.7E-05 0.0 1.3E+01 NA 0.0 Equipment Use and Misc 9,720.41 82.86 4.7E+00 100.0 4.8E-01 100.0 4.3E-01 100.0 3.3E+01 85.2 2.5E+01 87.9 1.3E+01 90.7 6.5E+04 3.8E-01 1.5 Residual Handling 0.27 0.00 0.0E+00 - 0.0E+00 - 0.0E+00 - 8.8E-05 0.0 3.6E-06 0.0 7.2E-06 0.0 3.8E+00 NA 0.0 Total 11,731.03 100 4.73E+00 100.0 4.83E-01 100 4.26E-01 100 3.91E+01 100 2.87E+01 100 1.40E+01 100 4.26E+06 3.80E-01 100 Notes• CO, - Airborne emissions of carbon dioxide MMBTU - Million British Thermal Units NOx - Airborne emissions of nitrogen oxides (combination of nitrogen monoxide and nitrogen dioxide) SOx - Airborne emissions of sulfur oxides (combination of sulfur monoxide, sulfur dioxide, sulfur trioxide, and others) PMio - Airborne emissions of particulate matter that is 10 micrometers or less in diameter Prepared By: GTC Checked By: WCG Page 1 of 1