NC0038377_Table 6-9 MNA Cost_20160229

TABLE 6-9
MONITORED NATURAL ATTENUATION OPINION OF PROBABLE COSTS
MAYO STEAM ELECTRIC PLANT
DUKE ENERY PROGRESS, LLC, ROXBORO, NC
Monitored Natural Attenuation - 61 Wells Sampled
Item Quantity Unit Unit Cost Total Cost Source Basis for Cost
Direct Capital Costs
Pre -design Field Assessment
1
LS
$50,000
$50,000
Similar project
Mobilization / Demobilization
12
LS
$5,000
$60,000
Similar project
10 day work week
Upgrade Roads/ Accessibility
1
LS
$100,000
$100,000
Similar project
Equipment Decontamination
11
EA
$570
$6,270
Similar project
Drilling and Materials (20 wells, average 60' well depth)
1,000
LF
$84
$84,000
Similar project
Installation of 20 additional wells for MNA, effective as monitoring wells
Drilling and Materials (6" outer surface casing for double -cased
wells)
160
LF
$125
$20,000
Similar project
Installation of 8 wells that need surface casing, assuming about 20' of
casing per well
Well Development
160
HR
$120
$19,200
Similar project
8 hours development per well
Installation Oversight (Geologist)
120
Day
$2,000
$240,000
Similar project
Approximately 6 days per well
Indirect Capital Costs
Health & Safety
5%
% DCC
26,474
Similar project
Bonds & Insurance
5%
% DCC
26,474
Similar project
Contingency
20%
% DCC
105,894
Similar project
Construction Management & Engineering Services
15%
% DCC
79,421
Similar project
Groundwater Sampling and Reporting - Years 1 - 5
Semiannual Well Sampling - Labor and Supplies
2
1 6 Mo
1 $92,800
$129,900
Similar project
2 people,. 7 days, 5 nights, equipment (35 wells, apprx. 5 wells per day)
Semiannual Well Sampling - Laboratory Analysis
2
1 6 Mo
1 $22,000
$44,000
Similar project
50 groundwater samples
Validation and Report Preparation
2
1 6 Mo
1 $20,000
$40,000
Similar project
Semiannual report preparation and initial evaluations
Present Worth $945,500
Similar project
n=5 yrs, 1=4.25%, PWF=4.42
Groundwater Sampling and Reporting - Years 6 - 30
Semiannual Well Sampling - Labor and Supplies
1 2
1 YR
1 $92,800
$129,900
Similar project
2 people, 10 days, 8 nights, equipment (50 wells, apprx. 5 wells per day)
Semiannual Well Sampling - Laboratory Analysis
1 2
1 YR
1 $22,000
$44,000
Similar project
50 groundwater samples
Validation and Report Preparation
1 2
1 YR
1 $12,000
$24,000
Similar project
Semiannual report preparation
Present Worth $3,012,100
Similar project
n=6-30, 1=4.25%, PWF=15.22
Remedy Review 1 1 EA 1 $100,000 $100,000
Similar project
Completed every five years
Present Worth $308,000
Similar project
n=5, 10, 15, 20, 25, 30, 1=4.25%, PWF=3.08
Total Direct Capital Costs $579,470
Total Indirect Capital Costs $238,262
Total 30 Year O&M Costs (Present Worth) $4,265,600
TOTAL COST $5,083,332
Prepared By: RKD Checked By: JAW
Notes:
LS = Lump Sum, EA = Each, LF = Linear Foot, HR = Hour, Mo = Month, YR = Year, DCC = Direct Capital Cost, O&M = Operation and Maintenance, PWF = Present Worth Factor , n = Time, I = Interest rate (provided by
Duke Progress, LLC)
Present Worth was calcualted using the Uniform Series Present Worth Factor at: http://www.ajdesigner.com/phpdiscountfactors/uniform_series_present_worth_equation.php
Assumptions:
10 additional wells are needed.
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