NC0004987_MSS_Appendix K_20191231

Corrective Action Plan Update December 2019
Marshall Steam Station
SynTerra
APPENDIX K
REMEDIAL ALTERNATIVE COST ESTIMATE
DETAILS

Appendix K
Table 1: Summary of Capital and Annual Costs
Remedial Alternative 1
Monitored Natural Attenuation
Marshall Steam Station
Terrell, North Carolina
Capital Costs
TASK #
TASK
UNIT
QUANTITY RATE
COST
1.0
Design/Engineering/Site Preparation
Pre -Design Field Planning
LUMP SUM
1
$65,000
$65,000
Design Document/Work Plan
LUMP SUM
1
$298,000
$298,000
$363,000
2.0
Monitoring Well Installation
Monitoring Well Installation
EACH
12
$22,833
$274,000
Monitoring Well Development
EACH
12
$1,083
$13,000
Installation of Dedicated Sampling Equipment
EACH
12
$1,417
$17,000
$304,000
3.0
Project Management
Project Management 10°/ Capital Cost
LUMP SUM
1
$67,000
$67,000
$67,000
Total Capital Cost
$734,000
Operations, Maintenance & Monitoring Costs
TASK #
TASK UNIT
QUANTITY RATE
COST
1.0
IGroundwater Sampling
Groundwater Sampling Event'
EACH
2 $11,000
$22,000
$22,000
2.0
IWO Maintenance
Annual Well Replacement
EACH
1 $57,000
$57,000
$57,000
3.0
Reporting
Annual Reporting
EACH
1
$90,000
$90,000
Five -Year Review Report
EACH
0.2
$88,000
$17,600
$108,000
4.0
Project Management
Project Management (10 % Annual Cost)
LUMP SUM
1 $19,000
$19,030
$19,000
Total Annual Cost
$206,000
Present Worth Analvsis
Years
Cost Type
Total Cost
Discount
Factor
Present
Value
0
Ca ital Costs
$734,000
1.000
$734,000
1-30
Annual Costs
$206,000
14.372
1 $2,961,000
Total Life Cycle Cost $3,695,000
Notes:
1. A - Groundwater sampling event includes 12 newly -installed monitoring wells. Additional monitoring costs are covered under existing programs.
2. Life cycle represents net present value of expenditures with capital costs incurred in Year 0 and annual costs incurred thereafter for 30 years. Discount Rate of 5 % assumed.
3. Costs presented herein represent a best estimate at this time. Actual costs may change based on a variety of factors during implementation.
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Appendix K
Table 2: Summary of Capital and Annual Costs
Remedial Alternative 2
Groundwater Extraction, Infiltration, and In -Situ Treatment
Marshall Steam Station
Terrell, North Carolina
Capital Costs
TASK #
TASK UNIT QUANTITY RATE 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
$298,000
$298,000
Permitting
LUMP SUM
1
$33,000
$33,000
$467,000
2.0
Monitoring Well Installation
Monitoring Well Installation
EACH
12
$22,800
$274,000
Monitoring Well Development
EACH
12
$1,100
$13,000
Installation of Dedicated Sampling Equipment
EACH
12
$1,400
$17,000
$304,000
3.0
Extraction Wells and Infiltration Galleries Installation
Extraction Well Installation
EACH
33
$58,400
$1,928,000
Well Development
EACH
33
$4,300
$141,000
Conveyance Piping and Electrical
LUMP SUM
1
$64Q000
$640,000
Infiltration Galleries
ACRE
7.3
$74,000
$540,000
$3,249,000
4.0
IClean Water Infiltration Treatment System Installation
Clean Water Infiltration Treatment System Installation LUMP SUM 1 $816,000
1 $816,000
$816,000
5.0
ChemicalInjection
Chemical Injection Well Installation
EACH
143
$22,860
$3,269,000
Chemical Injection
LUMP SUM
1 1
1 $394,000
1$394,000
$3,663,000
6.0
Project Management
Project Management 10% Capital Cost LUMP SUM 1 $850,000
$850,000
$850,000
Total Capital Cost $9,349,000
Operations, Maintenance & Monitoring Costs
TASK #
TASK UNIT
QUANTITY
RATE
COST
1.0
Operations and Maintenance
Operations and Maintenance
LUMP SUM
1
$422,000
$422,000
$422,000
2.0
lGroundwater Sampling
Groundwater Sampling Event"
EACH
2
$11,000
$22,000
$22,000
3.0
lWell Maintenance
Annual Well Replacement
EACH
1
$57,000
$57,000
$57,000
4.0
Reporting
Annual Reporting
EACH
1
$90,000
$90,000
Five -Year Review Report
EACH
0.2
$88,000
$18,000
$108,000
5.0
113roject Management
Project Management (10% Annual Cost)
LUMP SUM
1
$61,000
$61,000
$61,000
Total Annual Cost
$670,000
Present Worth Analvsis
Years
Cost T pe
Total Cost
Discount
Factor
Present
Value
0
Capital Costs
$9,349,000
1.000
$9,349,000
1-30
Annual Costs
$670,000
14.372
$9,630,000
30-32
Post -Remedy Monitoring
$266,000
0.662
$176,000
33
Well Abandonment Costs
$138,000
0.200
$28,000
Total Life Cycle Cost $19,183,000
Notes:
1. A - Groundwater sampling event includes 12 newly -installed monitoring wells. Additional monitoring costs are covered under existing programs.
2. 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.
3. Costs presented herein represent a best estimate at this time. Actual costs may change based on a variety of factors during implementation
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Appendix K
Table 3: Summary of Capital and Annual Costs
Remedial Alternative 3
Groundwater Extraction and Clean Water Infiltration
Marshall Steam Station
Terrell, North Carolina
Capital Costs
TASK #
TASK
UNIT
QUANTITY RATE
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
$298,000
$298,000
Permitting
LUMP SUM
1
$33,000
$33,000
$467,000
2.0
Monitoring Well Installation
Monitoring Well Installation
EACH
12
$22,833
$274,000
Monitoring Well Development
EACH
12
$1,083
$13,000
Installation of Dedicated Sampling Equipment
EACH
12
$1,417
$17,000
$304,000
3.0
Extraction & Clean Water Infiltration Wells Installation
Extraction Well Installation
EACH
66
$55,970
$3,694,000
Clean Water Infiltration Well Installation
EACH
24
$20,792
$499,000
Well Development
EACH
90
$4,311
$388,000
Conveyance Piping and Electrical
LUMP SUM
1
$1,486,000
$1,486,000
$6,067,000
4.0
IClean Water Infiltration Treatment System Installation
Clean Water Infiltration Treatment System Installation
LUMP SUM
1
$816,000
1 $816,000
$816,000
5.0
jProject Management
Project Management 10% Capital Cost
LUMP SUM
1
$765,000
$765,000
$765,000
Total Capital Cost
$8,419,000
Operations, Maintenance & Monitoring Costs
TASK #
TASK UNIT
QUANTITY
RATE
COST
1.0
Operations and Maintenance
Operations and Maintenance
LUMP SUM
1
$440,000
$440,000
$440,000
2.0
Groundwater Sampling
Groundwater Sampling Event"
EACH
2
$11,000
$22000
$22:000
3.0
lWell Maintenance
Annual Well Replacement
EACH
1
$57,000
$57,000
$57,000
4.0
Reporting
Annual Reporting
EACH
1
$90,000
$90,000
Five -Year Review Report
EACH
0.2
$88,000
$18,000
$108,000
5.0
jProject Management
Project Management 10% Annual Cost
LUMP SUM
1
$63,000
$63,000
$63,000
Total Annual Cost
$690,000 -11
Present Worth Analvsis
Years
Cost T pe
Total Cost
Discount
Factor
Present
Value
0
Capital Costs
$8,419,000
1.000
$8,419,000
1-9
Annual Costs
$690,000
6.108
$4,214,000
10-12
Post -Remedy Monitoring
$266,000
1.755
$467,000
13
Well Abandonment Costs
$109,000
0.530
$58,000
Total Life Cycle Cost $13,158,000
Notes:
1. "- Groundwater sampling event includes 12 newly -installed monitoring wells. Additional monitoring costs are covered under existing programs.
2. 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.
3. Costs presented herein represent a best estimate at this time. Actual costs may change based on a variety of factors during implementation
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