NRG Energy – Indian River Power NRG Energy – Indian River Power Plant Plant Center for the Inland Bays Citizen Advisory Center for the Inland Bays Citizen Advisory Committee Meeting January 17, 2019 Committee Meeting January 17, 2019 Alison Kiliszek, Engineer Alison Kiliszek, Engineer Delaware Department of Natural Resources and Environmental Control Delaware Department of Natural Resources and Environmental Control Solid and Hazardous Waste Management Section Solid and Hazardous Waste Management Section
Northern Stormwater Basin Phase II (~26 acres) Phase I (~38 acres) Active 2010 - present Active 1981 - 2014 Leachate Accumulation Tanks Southwest Stormwater Basin
Phase II (~26 acres) Phase I (~38 acres) Active 2010 - present Active 1981 - 2014 Geosynthetic Liner System Unlined Leachate Collection No Leachate Collection System System Geosynthetic Cap to be Geosynthetic Cap installed upon closure Installed Waste fully encapsulated Top of waste upon final closure encapsulated
Federal Coal Combustion Residual (CCR) Rule Federal Coal Combustion Residual (CCR) Rule Published in April 2015 Published in April 2015 Required CCR Landfills/Surface Impoundments to adhere to Required CCR Landfills/Surface Impoundments to adhere to regulations similar to Municipal Solid Waste Landfills regulations similar to Municipal Solid Waste Landfills Required a determination of background and/or statistically Required a determination of background and/or statistically significant increases in a number of constituents in groundwater significant increases in a number of constituents in groundwater
Periodic Monitoring Frequency Periodic Monitoring Frequency Groundwater: Semi-Annual in April and October Groundwater: Semi-Annual in April and October Quarterly 2015-2017 for Federal CCR Rule Quarterly 2015-2017 for Federal CCR Rule Surface Water: Semi-Annual in April and October Surface Water: Semi-Annual in April and October Stormwater: Twice per year and at least four (4) months apart Stormwater: Twice per year and at least four (4) months apart
3 3 3 1 1 1 1 3 4 1 1 3 1 1 1 Groundwater Locations 1 Surface Water Locations 1 Stormwater Locations
Monitoring Result Influences Monitoring Result Influences Seasonal influences Seasonal influences Tidal influences Tidal influences Surface Water and Groundwater Interface influences Surface Water and Groundwater Interface influences
Monitored Parameters Monitored Parameters Radium 226 & 228 Molybdenum Manganese Magnesium Chromium Cadmium Potassium Antimony Alkalinity Selenium Beryllium Chloride Copper* Calcium Mercury Thallium Fluoride Arsenic Sodium Barium Lithium Cobalt Sulfate Boron Lead TOC Iron TDS pH 2010 X X X X X X X X X X X X X X X 2011 X X X X X X X X X X X X X X X 2012 X X X X X X X X X X X X X X X 2013 X X X X X X X X X X X X X X X 2014 X X X X X X X X X X X X X X X 2015 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 2016 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 2017 X X X X X X X X X X X X X X X X X X X X X X X X X X X X 2018 X X X X X X X X X X X X X X X X * NOT REQUIRED BY PERMIT OR EPA
Periodic Monitoring Reporting Periodic Monitoring Reporting Groundwater, Surface Water, and Stormwater Monitoring results are Groundwater, Surface Water, and Stormwater Monitoring results are reported to the Department within sixty (60) days of sampling event reported to the Department within sixty (60) days of sampling event An updated hydrogeological report is submitted annually An updated hydrogeological report is submitted annually Groundwater Background Report submitted November 2017 for Groundwater Background Report submitted November 2017 for Federal Coal Combustion Residual Rule Federal Coal Combustion Residual Rule
Plot of Select Parameters Plot of Select Parameters
Arsenic (mg/L) 0.2 0.18 0.16 0.14 103C 0.12 0.1 0.08 0.06 103CR 326C 103A 0.04 327A 326B 0.02 0 1/1/2010 9/8/2010 5/16/2011 1/21/2012 9/27/2012 6/4/2013 2/9/2014 10/17/2014 6/24/2015 2/29/2016 11/5/2016 7/13/2017 3/20/2018 11/25/2018 MCL Phase I Capped Total Metals
Arsenic (mg/L) (focus on 2016 – 2018 data only) 0.05 0.04 0.03 103C 103CR 0.02 103A 326C 327A 326B 0.01 0 1/1/2016 3/31/2016 6/29/2016 9/27/2016 12/26/2016 3/26/2017 6/24/2017 9/22/2017 12/21/2017 3/21/2018 6/19/2018 9/17/2018 12/16/2018 MCL Phase I Capped Total Metals
Beryllium (mg/L) (CCR Rule only) 0.009 0.008 327A 0.007 0.006 0.005 0.004 103A 0.003 0.002 0.001 0 1/1/2010 9/8/2010 5/16/2011 1/21/2012 9/27/2012 6/4/2013 2/9/2014 10/17/2014 6/24/2015 2/29/2016 11/5/2016 7/13/2017 3/20/2018 11/25/2018 MCL Phase I Capped Total Metals
Boron (mg/L) (CCR Rule to present) 30 25 20 15 10 5 0 1/1/2010 9/8/2010 5/16/2011 1/21/2012 9/27/2012 6/4/2013 2/9/2014 10/17/2014 6/24/2015 2/29/2016 11/5/2016 7/13/2017 3/20/2018 11/25/2018 Phase I Capped Total Metals
Cobalt (mg/L) (CCR Rule only) 0.05 0.04 0.03 0.02 0.01 0 1/1/2010 9/8/2010 5/16/2011 1/21/2012 9/27/2012 6/4/2013 2/9/2014 10/17/2014 6/24/2015 2/29/2016 11/5/2016 7/13/2017 3/20/2018 11/25/2018 Phase I Capped Total Metals
Lithium (mg/L) (CCR Rule only) 4 103CR 3.5 103C 3 2.5 2 327B 1.5 103B 1 327C 0.5 0 1/1/2010 9/8/2010 5/16/2011 1/21/2012 9/27/2012 6/4/2013 2/9/2014 10/17/2014 6/24/2015 2/29/2016 11/5/2016 7/13/2017 3/20/2018 11/25/2018 Phase I Capped Total Metals
Manganese (mg/L) 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 1/1/2010 9/8/2010 5/16/2011 1/21/2012 9/27/2012 6/4/2013 2/9/2014 10/17/2014 6/24/2015 2/29/2016 11/5/2016 7/13/2017 3/20/2018 11/25/2018 SDWS Phase I Capped Total Metals
Mercury (mg/L) (Analysis Ceased 2018) 0.0025 0.002 0.0015 P-1R 2.1 mg/L on 10/10/2013 on 0.001 AshTracker was Turbidity. 10/10/2013 Mercury value was <0.0005 mg/L 0.0005 0 1/1/2010 9/8/2010 5/16/2011 1/21/2012 9/27/2012 6/4/2013 2/9/2014 10/17/2014 6/24/2015 2/29/2016 11/5/2016 7/13/2017 3/20/2018 11/25/2018 MCL Phase I Capped Total Metals
Molybdenum (mg/L) (CCR Rule only) 10 103CR 9 8 7 103C 6 5 4 103B 3 326C 2 327B 1 327C 0 1/1/2010 9/8/2010 5/16/2011 1/21/2012 9/27/2012 6/4/2013 2/9/2014 10/17/2014 6/24/2015 2/29/2016 11/5/2016 7/13/2017 3/20/2018 11/25/2018 Phase I Capped Total Metals
Selenium (mg/L) 0.3 0.25 0.2 0.15 0.1 103A 326C 0.05 0 1/1/2010 9/8/2010 5/16/2011 1/21/2012 9/27/2012 6/4/2013 2/9/2014 10/17/2014 6/24/2015 2/29/2016 11/5/2016 7/13/2017 3/20/2018 11/25/2018 MCL Phase I Capped Total Metals
Sulfate (mg/L) 2000 1500 1000 500 0 1/1/2010 9/8/2010 5/16/2011 1/21/2012 9/27/2012 6/4/2013 2/9/2014 10/17/2014 6/24/2015 2/29/2016 11/5/2016 7/13/2017 3/20/2018 11/25/2018 SDWS Phase I Capped Total Metals
Compliance History 2010 - present Compliance History 2010 - present April 15, 2014 NOV – temporary interior slopes not compliant with operations plan April 15, 2014 NOV – temporary interior slopes not compliant with operations plan RTC January 9, 2014 (compliance achieved prior to NOV being issued) RTC January 9, 2014 (compliance achieved prior to NOV being issued) December 9, 2014 NOV – failure to conduct hazardous waste determination December 9, 2014 NOV – failure to conduct hazardous waste determination RTC October 29, 2014 (compliance achieved prior to NOV being issued) RTC October 29, 2014 (compliance achieved prior to NOV being issued) February 15, 2017 LOW – prohibited waste accumulated in Phase II February 15, 2017 LOW – prohibited waste accumulated in Phase II RTC March 14, 2017 RTC March 14, 2017
Looking Toward the Future… Looking Toward the Future… Rising sea level has the potential to impact the landfill units Rising sea level has the potential to impact the landfill units Seasonal influences Seasonal influences Tidal influences Tidal influences Surface Water and Groundwater Interface influences Surface Water and Groundwater Interface influences Monitoring is expected to occur until the end of the Post-Closure Care period Monitoring is expected to occur until the end of the Post-Closure Care period
Jason.Sunde@state.de.us Jason.Sunde@state.de.us Alison.Kiliszek@state.de.us
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