NC0004979_Allen_Appendix K_20191231

Corrective Action Plan Update December 2019
Duke Energy Carolinas, LLC - Allen Steam Station
APPENDIX K
REMEDIAL ALTERNATIVE COST ESTIMATE
DETAILS
SynTerra

Appendix K
Table 1: Summary of Capital and Annual Costs
Remedial Alternative 1
Monitored Natural Attenuation
Allen Steam Station
Belmont, North Carolina
Capital Costs
TASK #
TASK
UNIT
QUANTITY RATE
COST
1.0
Design/Engineering/Site Preparation
Pre -Design Field Planning
LUMP SUM
1
$0
$o
Design Document/Work Plan
LUMP SUM
1
$0
1 $0
$o
2.0
Monitoring Well Installation
Monitoring Well Installation
EACH
0
$0
$0
Monitoring Well Development
EACH
0
$0
$0
Installation of Dedicated Sampling Equipment
EACH
0
$0
$0
$0
3.0
Project Management
Project Management 10°% Capital Cost
LUMP SUM
1
$0
$o
$0
Total Capital Cost
$0
Operations, Maintenance & Monitoring Costs
TASK #
TASK UNIT
QUANTITY
RATE
COST
1.0
IGroundwater Sampling
Groundwater Sampling Event
EACH
0
$0
$o
$0
2.0
1 Monitoring Well Maintenance
Annual Monitoring Well Replacement
EACH
0
$0
$0
$0
3.0
Reporting
Annual Reporting
EACH
0
$0
$0
Five -Year Review Report
EACH
0
$0
$0
$o
4.0
Project Management
Project Management (10 % Annual Cost)
LUMP SUM
1
$0
$o
$0
Total Annual Cost
$0
Present Worth Analvsis
Year(s)
Cost Type
Total Cost
Discount
Factor
Present
Value
0
Capital Costs
$0
1.000
$0
1-30
Annual Costs
$0
14.372
$0
Total Life Cycle Cost
Notes:
1. Life cycle represents net present value of expenditures with capital costs incurred in Year 0, annual costs incurred thereafter for 30 years. Discount Rate of 5% assumed.
Page 1 of 1

Appendix K
Table 2: Summary of Capital and Annual Costs
Remedial Alternative 2
Groundwater Extraction and Treatment
Allen Steam Station
Belmont, North Carolina
Capital Costs
TASK #
TASK
UNIT
QUANTITY RATE
I COST
1.0
Design/Engineering/Site Preparation
Pre -Design Field Planning
LUMP SUM
1
$136,000
$136,000
Design Document/Work Plan
LUMP SUM
1 1
$417,000
$417,000
Permitting
LUMP SUM
1
$33,000
$33,000
$586,000
2.0
Remediation Wells Installation
Extraction Well Installation
EACH
81
$47,790
$3,871,000
Well Development
EACH
81
$1,309
$106,000
Conveyance Piping and Electrical
LUMP SUM
1
$1,216,000
$1,216,000
$5,193,000
3.0
ITreatment System Installation
H Adjustment Treatment System
LUMP SUM
1
$408,000
$408,000
$408,000
4.0
Project Management
Project Management 10°/ Capital Cost
LUMP SUM
1
$619,000
$619,000
$619,000
Total Capital Cost
$6,806,000
Operations, Maintenance & Monitoring Costs
TASK #
TASK UNIT
QUANTITY I RATE
COST
1.0
Operations and Maintenance
Operations and Maintenance
I LUMP SUM
1 1 $467,000
$467,000
$467,000
2.0
Re ortin
Annual Reporting
EACH
1
1 $91,000
$91,000
Five -Year Review Report
EACH
0.2
$88,000
$17,600
$108,600
3.0
Project Management
Project Management 10% Annual Cost
LUMP SUM
1 $58,000
$58,000
$58,000
Total Annual Cost
$633,600
Present Worth Analvsls
Years
Cost Type
Total Cost
Discount
Factor
Present
Value
0
Capital Costs
$6,806,000
1.000
$6,806,000
1-30
IAnnual Costs
$633,600
14.372
1 $9,106,000
Total Life Cycle Cost $15,912,000
Notes:
1. Life cycle represents net present value of expenditures with capital costs incurred in Year 0, annual costs incurred thereafter for 30 years. Discount Rate of 5% assumed.
2. Costs presented herein represent a best estimate at this time. Actual costs may change based on a variety of factors during implementation.
Page 1 of 1

Appendix K
Table 3a: Summary of Capital and Annual Costs
Remedial Alternative 3A
Groundwater Extraction Combined with Clean Water Infiltration and Treatment
(Vertical Wells Only)
Allen Steam Station
Belmont, North Carolina
Capital Costs
TASK #
TASK
UNIT
QUANTITY RATE
I COST
1.0
Desi n/En ineerin /Site Preparation
Pre -Design Field Planning
LUMP SUM
1
$136,000
$136,000
Design Document/Work Plan
LUMP SUM
1
$417,000
$417,000
Permitting
LUMP SUM
1
$33,000
$33,000
$586,000
2.0
Remediation Wells Installation
Extraction Well Installation
EACH
87
$48,931
$4,257,000
Clean Water Infiltration Well Installation
EACH
76
$25,105
$1,908,000
Well Development
EACH
163
$1,319
$215,000
Conveyance Piping and Electrical
LUMP SUM
1
$2,435,000
$2,435,000
$8,815,000
3.0
Treatment System Installation
pH Adjustment Treatment System
LUMP SUM
1
$428,000
$428,000
Clean Water Infiltration Treatment System Installation
LUMP SUM
1
$915,000
$915,000
$1,343,000
4.0
Project Management
Project Management 10% Capital Cost
LUMP SUM
1
$1,075,000
$1,075,000
$1,075,000
Total Capital Cost
$11,819,000
Operations, Maintenance & Monitoring Costs
TASK#
TASK
UNIT
QUANTITY RATE
COST
1.0
10perations and Maintenance
Remediation Wells Operations and Maintenance
LUMP SUM
1 $541,000
$541,000
$541,000
2.0
Reportin
Annual Reporting
EACH
1
$91,000
$91,000
Five -Year Review Report
EACH
0.2
$88,000
$18,000
$109,000
3.0
Project Management
Project Management (10% Annual Cost)
LUMP SUM
1 $65,000
$69,000
$65,000
Total Annual Cost
$715,000
Present Worth Analvsis
Years
Cost Type
Total Cost
Discount
Factor
Present
Value
0
Capital Costs
$11,819,000
1.000
$11,819,000
1-9
Annual Costs
$715,000
6.108
$4,367,000
10-12
Post -Remedy Monitoring
$220,000
1.755
$386,000
13
Well Abandonment Costs
$154,000
0.530
$82,000
Total Life Cycle Cost $16,654,000
Notes:
1. Life cycle represents net present value of expenditures with capital costs incurred in Year 0, annual costs incurred thereafter, and well abandonment in the last year. Discount Rate of
5% assumed.
2. Costs presented herein represent a best estimate at this time. Actual costs may change based on a variety of factors during implementation.
Page 1 of 1

Appendix K
Table 3b: Summary of Capital and Annual Costs
Remedial Alternative 3B
Groundwater Extraction Combined with Clean Water Infiltration and Treatment
(Vertical and Horizontal Wells)
Allen Steam Station
Belmont, North Carolina
Capital Costs
TASK #
TASK
UNIT
QUANTITY RATE
I COST
1.0
Design/Engineering/Site Preparation
Pre -Design Field Planning
LUMP SUM
1
$136,000
$136,000
Design Document/Work Plan
LUMP SUM
1
$417,000
$417,000
Permitting
LUMP SUM
1
$33,000
$33,000
$586,000
2.0
Remediation Wells Installation
Extraction Well Installation
EACH
87
$48,931
$4,257,000
Clean Water Infiltration Well Installation
EACH
48
$26,604
$1,277,000
Well Development
EACH
135
$1,304
$176,000
Horizontal Well Installation
EACH
1
$175,521
$3,205,000
Conveyance Piping and Electrical
LUMP SUM
1
$2,346,000
$2,346,000
$11,261,000
3.0
Treatment System Installation
H Adjustment Treatment System
LUMP SUM
1
$428,000
$428,000
Clean Water Infiltration Treatment System Installation
LUMP SUM
1
$915,000
$915,000
$1,343,000
4.0
Project Management
Project Management 10% Capital Cost
LUMP SUM
1
$1,319,000
$1,319,000
$1,319,000
Total Capital Cost
$14,509,000
Operations, Maintenance & Monitoring Costs
TASK #
TASK
UNIT
QUANTITY RATE
COST
1.0
10perations and Maintenance
Remediation Wells Operations and Maintenance
LUMP SUM
1 $541,000
$541,000
$541,000
2.0
Re ortin
Annual Reporting
EACH
1
$91,000
$91,000
Five -Year Review Report
EACH
0.2
$88,000
$18,000
$109,000
3.0
Project Management
Project Management 10% Annual Cost
LUMP SUM
1 $65,000
$65,000
$65,000
Total Annual Cost
$715,000
Present Worth Analvsis
Year(s)
I Cost Type
Total Cost
Discount
Factor
Present
Value
0
Icapital Costs
$14,509,000
1.000
$14,509,000
v�1-9
Annual Costs
$715,000
6.108
$4,367,000
10-12
Post -Remedy Monitoring
$220,000
1.755
$386,000
13
lWell Abandonment Costs
$136,000
0.530
$72,000
Total Life Cycle Cost $19,334,000
Notes:
1. Life cycle represents net present value of expenditures with capital costs incurred in Year 0, annual costs incurred thereafter, and well abandonment in the last year. Discount Rate of
5% assumed.
2. Costs presented herein represent a best estimate at this time. Actual costs may change based on a variety of factors during implementation.
Page 1 of 1