NC0005363_Table 6-6 Remedial Alternative Evaluation Summary R1_20160201

TABLE 6-6
REMEDIAL ALTERNATIVE EVALUATION SUMMARY
W.H. WEATHERSPOON POWER PLANT
DUKE ENERGY PROGRESS, LLC, LUMBERTON, NC
Prepared By: KDB Checked By: MT
Assumptions: 1. Source control measures are implemented to accomplish groundwater restoration
2. Costs for groundwater remedy include implementation and 30 years monitoring and maintenance
P:\Duke Energy Progress. 1026\109. Weatherspoon Ash Basin GW Assessment Plan\20.EG_CAP\CAP Part 2\Tables\Table 6-6 Remedial Alternative Evaluation Summary Ri.docx Page 1 of 1
Estimated
Alternatives
Effectiveness
Implementability
Environmental
Groundwater
Stakeholder
/ Feasibility
Sustainability
Remediation
Acceptance
Cost
Monitored
Yes, groundwater
High
Sound
Natural
Yes
monitoring wells
(lowest carbon
$3,100,000
technical
Attenuation
are common
footprint)
basis for
(MNA)
approach
Phytoremediation
Yes
Yes, if ash
High
$6,700,000
Predicted to
removedbe
positive
Moderate
Limited due
Groundwater
(energy costs
to trench
Interceptor
Limited
Limited
to manufacture
$11,100,000
performance
Trench
steel and install
and long
trench)
time frame
Groundwater
Moderate
Positive due
Recovery Wells
Yes
Yes
(energy costs
$6,200,000
to proactive
for pumps)
nature
Prepared By: KDB Checked By: MT
Assumptions: 1. Source control measures are implemented to accomplish groundwater restoration
2. Costs for groundwater remedy include implementation and 30 years monitoring and maintenance
P:\Duke Energy Progress. 1026\109. Weatherspoon Ash Basin GW Assessment Plan\20.EG_CAP\CAP Part 2\Tables\Table 6-6 Remedial Alternative Evaluation Summary Ri.docx Page 1 of 1