NC0022406_BCSS Accelerated Remediation Summary_20160502

Belews Creek Steam Station
Proposed Accelerated Remediation for Offsite Groundwater Impacts
1.0 Background
The Winston Salem (WS) Regional office recently expressed concern in regards to groundwater near the
Belews Creek Steam Station, west and southwest of the Pine Hall Landfilll (south/southwest of the ash
basin). The WS regional staff requested additional bedrock wells to better define bedrock conductivity.
The WS regional staff and Duke agreed to install four additional bedrock wells on the western side of the
ash basin and west/southwest of the Pine Hall Landfill in addition to one shallow and deep well southwest
of the Pine Hall Landfill (see Figure 1). The shallow and deep well pair will be utilized to refine
groundwater flow direction in the area of installation. The six wells are in addition to the previously
defined data gap wells.
The WS regional staff requested additional reporting for the onsite lined landfill facilities as well as
construction logs to be provided in the Corrective Action Plan for wells determined to be background
(onsite and as apart of the Duke 2-10 program). Duke explained that well construction logs might not
exist for 2-10 wells.
2.0 Scope
The following steps are recommended:
• Compare Round 2 analyses of groundwater monitoring with Round 1.
• Accelerate installation, sampling, and analyses of additional assessment wells planned for this
facility. [Status - E&SC permit received on Feb 11, 2016 (dated February 4, 2016). Drilling is
anticipated to begin February 23, 2016] A permit modification will be required for the additional
wells requested by the WS regional office.
• Research will be completed to determine if construction documentation is available for wells in
the Duke 2-10 background program
• Background wells for Belews Creek FGD and Craig Rd Landfills will be reviewed to determine if
the background wells at these landfills are in the same geologic formation as the ash basin. A
summary of review with boring and construction logs will be prepared for submittal to the WS
regional office.
3.0 Challenges
• Erosion & Sediment Control permit
• Fluctuation of water levels in the ash basin may affect groundwater flow direction
February 17, 2016 1 of 3

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Belews Creek Steam Station
Proposed Accelerated Remediation for Offsite Groundwater Impacts
5.0 Conceptual Schedule
Task Description
Estimated
Length of Time
Estimated
Completion Date
Real Estate pursue property purchase
Ongoing
Data gap and additional well engineering design
Complete
Data gap and additional well NCDEQ permit review and
receipt
Data Gap Wells
Additional Wells
Complete
Ongoing
Data gap and additional well installation
4 weeks
3/25/2016
Data gap and additional well sampling
1 week
4/1/2016
Analysis of data gap and additional wells
3 weeks
4/22/2016
Research availability of 2-10 well construction records
ongoing
Review of onsite lined landfill facilities and report compilation
(begin February 22)
4 weeks
3/25/2016
Update Regional Office on 2-10 construction records and
onsite landfill research
3/15/2016
Meet with Regional Office to review data findings associated
with 2-10 and onsite landfill research and additional well
sampling results
5/6,2016
February 17, 2016 3 of 3