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CCR Data Rule

Winyah

Winyah has 5 ponds and 2 landfills subject to elements of the CCR Rule.  Included in these is the Winyah Unit 2 Slurry pond which was certified closed by removal on November 9, 2017.

Legacy CCR Rule Site Information

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  • 257.100(f)(1)(i) Legacy Applicability Report

Existing facilities with impoundments were required to complete a Legacy CCR Impoundment Applicability Report no later than November 8, 2024. If no Legacy CCR Impoundments are identified at a facility, no Legacy Applicability Report is required.

  • 257.75(c) Facility Evaluation Report Part 1
  • 257.75(d) Facility Evaluation Report Part 2

Existing facilities are required to complete a Facility Evaluation Report Part 1 no later than February 9, 2026, and a Facility Evaluation Report Part 2 no later than February 8, 2027. 

Ash Pond A

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Because Santee Cooper is closing Ash Pond A by removal, this unit is not subject to post-closure care requirements in 257.104.

Santee Cooper is closing Ash Pond A by removal and does not plan to retrofit this unit into a new CCR surface impoundment; therefore, these criteria are not required. 

Ash Pond B

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Because Santee Cooper is closing Ash Pond B by removal, this unit is not subject to post-closure care requirements in 257.104.

Santee Cooper is closing Ash Pond B by removal and does not plan to retrofit this unit into a new CCR surface impoundment; therefore, these criteria are not required.

South Ash Pond

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  • 257.90(e) - Annual Groundwater Monitoring and Corrective Action Report
  • 257.91(f) - Certified groundwater monitoring system
  • 257.93(f)(6) - Certified selected statistical method
  • 257.94(e)(3) - Notification when assessment monitoring is established
  • 257.95(e) - Notification to resume detection monitoring if results for Appendix III & IV constituents are below background
    • Demonstration to be completed as needed
  • 257.95(g) - Notification if Appendix IV constituents have exceeded groundwater protection standards at statistically significant levels
    • Demonstration to be completed as needed
  • 257.95(g)(5) - Notification if Assessment of Corrective Measures has been initiated
    • Demonstration to be completed as needed
  • 257.96 - Assessment of Corrective Measures Report
  • 257.97(a) - Semi-annual progress reports for selecting and designing a remedy and the final Remedy Selection Report
  • 257.98(e) - Notification that the remedy is complete
    • Demonstration to be completed as needed

Because Santee Cooper is closing the South Ash Pond by removal, this unit is not subject to post-closure care requirements in 257.104.

Santee Cooper is closing the South Ash Pond by removal and does not plan to retrofit this unit into a new CCR surface impoundment; therefore, these criteria are not required.

Closed Unit 2 Slurry Pond: Certified closed by removal on November 9, 2017

The Unit 2 Slurry Pond was an inactive surface impoundment under the CCR Rule. It was closed by removal of CCR material and CCR-contact soil under a South Carolina Department of Health and Environmental Control (SC DHEC) approved closure plan on November 9, 2017.

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Inactive surface impoundments were required to complete the Location Restrictions demonstrations no later than April 16, 2020. Because the Unit 2 Slurry Pond was certified closed by removal on November 9, 2017, and could no longer contain CCR or liquids, these demonstrations were not completed. However, the Class 3 Landfill Area 1 was constructed in the footprint of the closed Unit 2 Slurry Pond, therefore a completed Location Restrictions demonstration can be found in that section below.

Inactive surface impoundments were required to complete the Design Criteria no later than April 17, 2018. Because the Unit 2 Slurry Pond was certified closed by removal on November 9, 2017, and could no longer contain CCR or liquids, these demonstrations were not completed.

Inactive surface impoundments were required to prepare the Fugitive Dust Control Plan and Initial Inflow Design Flood Control Plan no later than April 17, 2018. The initial annual inspection report was required to be completed no later than July 19, 2017. Because the Unit 2 Slurry Pond was certified closed by removal on November 9, 2017, and could no longer contain CCR or liquids, these demonstrations were either not completed or are no longer necessary.

  • 257.90(e) - Annual Groundwater Monitoring and Corrective Action Report
  • 257.91(f) - Certified groundwater monitoring system
  • 257.93(f)(6) - Certified selected statistical method
  • 257.94(e)(3) - Notification when assessment monitoring is established
  • 257.95(e) - Notification to resume detection monitoring if results for Appendix III & IV constituents are below background
    • Demonstration to be completed as needed
  • 257.95(g) - Notification if Appendix IV constituents have exceeded groundwater protection standards at statistically significant levels
    • Demonstration to be completed as needed
  • 257.95(g)(5) - Notification if Assessment of Corrective Measures has been initiated
    • Demonstration to be completed as needed
  • 257.96 - Assessment of Corrective Measures Report
    • Demonstration to be completed as needed
  • 257.97(a) - Semi-annual progress reports for selecting and designing a remedy and the final Remedy Selection Report
    • Demonstration to be completed as needed
  • 257.98(e) - Notification that the remedy is complete
    • Demonstration to be completed as needed

Inactive surface impoundments were required to install the groundwater monitoring system and begin monitoring, including collection and analyses of eight independent samples, no later than April 17, 2019.

Inactive surface impoundments were required to place the Notification of Intent to Initiate Closure in the facility’s operating record no later than December 15, 2015, and post to the website no later than January 19, 2016. Inactive surface impoundments were also required to complete the above Closure criteria no later than April 17, 2018. Because the Unit 2 Slurry Pond was certified closed by removal on November 9, 2017, this unit is not subject to post-closure care requirements in 257.104.

Class 3 Landfill Area 1

The Winyah Class 3 Landfill Area 1 received approval to operate and began receiving waste on November 1, 2018.  The landfill is located in the footprint of the closed Unit 2 Slurry Pond. 

Click below to expand each section to get to specific documents.

  • 257.90(e) - Annual Groundwater Monitoring and Corrective Action Report
  • 257.91(f) - Certified groundwater monitoring system
  • 257.93(f)(6) - Certified selected statistical method
  • 257.94(e)(3) - Notification when assessment monitoring is established
    • Demonstration to be completed as needed
  • 257.95(e) - Notification to resume detection monitoring if results for Appendix III & IV constituents are below background
    • Demonstration to be completed as needed
  • 257.95(g) - Notification if Appendix IV constituents have exceeded groundwater protection standards at statistically significant levels
    • Demonstration to be completed as needed
  • 257.95(g)(5) - Notification if Assessment of Corrective Measures has been initiated
    • Demonstration to be completed as needed
  • 257.96 - Assessment of Corrective Measures Report
    • Demonstration to be completed as needed
  • 257.97(a) - Semi-annual progress reports for selecting and designing a remedy and the final Remedy Selection Report
    • Demonstration to be completed as needed
  • 257.98(e) - Notification that the remedy is complete
    • Demonstration to be completed as needed

Class 3 Landfill Area 2

The Winyah Class 3 Landfill Area 2 received approval to operate on December 20, 2021, and began receiving waste on March 28, 2022.  The landfill is located in a portion of the footprint of Ash Pond A which is currently undergoing closure in a phased approach.  South Carolina Department of Health and Environmental Control (SC DHEC) certified applicable portions of Ash Pond A closed prior to initiating landfill construction.  

Click below to expand each section to get to specific documents.

  • 257.90(e) - Annual Groundwater Monitoring and Corrective Action Report
  • 257.91(f) - Certified groundwater monitoring system
  • 257.93(f)(6) - Certified selected statistical method
  • 257.94(e)(3) - Notification when assessment monitoring is established
    • Demonstration to be completed as needed
  • 257.95(e) - Notification to resume detection monitoring if results for Appendix III & IV constituents are below background
    • Demonstration to be completed as needed
  • 257.95(g) - Notification if appendix IV constituents have exceeded groundwater protection standards at statistically significant levels
    • Demonstration to be completed as needed
  • 257.95(g)(5) - Notification if Assessment of Corrective Measures has been initiated
    • Demonstration to be completed as needed
  • 257.96 - Assessment of Corrective Measures Report
    • Demonstration to be completed as needed
  • 257.97(a) - Semi-annual progress reports for selecting and designing a remedy and the final Remedy Selection Report
    • Demonstration to be completed as needed
  • 257.98(e) - Notification that the remedy is complete
    • Demonstration to be completed as needed

  • 257.102(b) - Written Closure Plan
  • 257.102(e)(2) - Demonstration + owner certification for time extension to initiate closure if idle for 2 years
    • Demonstration to be completed as needed
  • 257.102(f)(2) - Demonstration + owner certification for time extension to complete closure
    • Demonstration to be completed as needed
  • 257.102(g) - Notice of intent to close CCR unit with PE certification
    • Demonstration to be complete at initiation of closure
  • 257.102(h) - Notice closure is complete with PE certification
  • 257.102(i) - Notice deed notation was recorded for units closed in place
    • Demonstration to be complete within 30 days of completion
  • 257.104(d) - Written Post-Closure Plan and any amendments
  • 257.104(e) - Notification post-closure is complete
    • Demonstration to be complete within 60 days of completion of the post-closure care period

Slurry Pond 3 & 4

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Because Santee Cooper is closing Slurry Pond 3 & 4 by removal, this unit is not subject to post-closure care requirements in 257.104.

Santee Cooper is closing Slurry Pond 3 & 4 by removal and does not plan to retrofit this unit into a new CCR surface impoundment; therefore, these criteria are not required.