Alternate Water Plan 12-7-16

�. DUKE
ENERGY.
December 7, 2016
Harry K Sideris
Senior Vice-Prestdent
Environmental, Health & Safety
526 South Church Street
Mall Code ECUP
RFcrP''D Charlotte, NC 26202
CM,ce Of si;a :'3Cretary 704-382-43M
D `C 7 u o
Dr. Donald R. van der Vaart
North Carolina Department of Environmental Quality
1601 Mail Service Center Deperfmenf of Environment
Raleigh, North Carolina 27699-1601 and Ndural Resouwces
Subject: Submittal of Duke's HB630 Proposed Plans for Allen, Belews Creek, Buck,
Cape Fear, Dan River, HF Lee, Marshall, Mayo, Riverbend, Rogers Energy
Complex, Roxboro and Weatherspoon
Dear Secretary van der Vaart:
House Bill 630 requires Duke Energy to submit by December 15, 2016, plans for the provision
of permanent water to eligible households located within one-half mile of the ash basin
compliance boundaries. As indicated in my September 7 letter to you, submittal of site -
specific plans as they are ready will result in the most expeditious review. Today, we're
submitting proposed permanent water supply plans for the eligible households surrounding
Allen, Belews Creek, Buck, Cape Fear, Dan River, HF Lee, Marshall, Mayo, Riverbend,
Rogers Energy Complex (Cliffside), Roxboro and Weatherspoon; these plans follow the
protocol approved by the department on September 22.
Dewberry, a respected outside engineering firm, evaluated the connection of eligible
households to the local potable water system. Duke Energy used the Dewberry assessment
to develop proposed permanent water supply plans that would ensure eligible households
receive a long-term, high -quality water supply that is also cost effective.
Connection to a public water supply is recommended for the majority of the households
surrounding Allen, Buck, Marshall, Rogers and Weatherspoon; there are a few households for
whom the recommendation is a whole -house water treatment system due to water -quality
concerns and/or prohibitive installation cost. Connection to a public water supply is
recommended for all of the household surrounding Dan River, Cape Fear, and HF Lee.
Residents near Belews Creek, Mayo and Roxboro live in a much more rural area, far from
public water lines, making it technically difficult and cost prohibitive to extend that service and
maintain water quality over great distances. Duke's recommendation is that those residents
be offered water treatment systems.
There are no eligible residents near Riverbend.
Duke is currently soliciting bids for an ion filtration water treatment system. To ensure that the
residents receive a system that addresses the constituents that were identified in 2015 as
potentially being adverse to human health, we set the performance standard for arsenic,
hexavalent chromium, cobalt, iron, lead, manganese, sulfate and vanadium at either one-half
of the MCL, or the appropriate state standard, whichever is more protective.

The NCDEQ Staff recently requested GIS files that correspond to the proposed plans for each
location. Duke is currently pulling together the GIS information and it will be submitted
directly to NCDEQ staff as it is available; as this request was not part of the original
requirement of HB630, it may be delivered in the weeks following December 15.
Permanent'water supply plans for the remaining locations will be submitted in the coming
weeks. I look forward to receiving the agency's feedback on our proposed plans.
If you have comments and/or questions, please direct them to me at 704-382-4303.
Sincerely,
Harry K. Sideris
Senior Vice -President
Environmental, Health & Safety
Enclosure: Permanent Water Supply Proposals to DEQ and associated Dewberry Phase II
Potable Water Programmatic Evaluation for Allen, Belews Creek, Buck, Cape
Fear, Dan River, HF Lee, Marshall, Mayo, Riverbend, Rogers Energy Complex,
Roxboro and Weatherspoon
xc: Tom Reeder, Asst. Secretary for the Environment

Permanent Water Supply Proposal to DEQ- Allen
Allen Steam Station
Gaston County
272 eligible households; 3 community supply wells
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309.21 1 (cl) of House Bill
630. Households were designated as "eligible" if any portion of a parcel of land crossed the 1/2
mile compliance buffer described in H9630 and if the household currently utilized well water or
bottled water (under Duke Energy's bottled water program) as the drinking water source.
Although HB630 indicates that households are to be covered, Duke Energy has included four
(4) offices/businesses as eligible locations. In addition, Aqua North Carolina serves 77
households from three (3) public community wells located within the'/2 mile boundary. Although
Aqua is already providing these households with a public water supply, Duke Energy has
included the Aqua North Carolina community wells and the households they serve as eligible.
Undeveloped parcels were identified but were not considered "eligible" because groundwater
wells are not currently utilized as a drinking source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and a preliminary
engineering evaluation, cost estimate and schedule. Dewberry's report, for the most part,
assumes one metered connection per parcel; therefore, multiple homes may be serviced by one
connection. The total count in this proposed plan includes all final connections.
Based on the results of the Dewberry evaluation and the factors below, Duke Energy proposes
that 193 eligible households and businesses be offered the option of a connection to the City of
Belmont water supply or the installation of a water treatment system, Duke Energy also
proposes that an interconnection between the City of Belmont and the three Aqua North
Carolina systems be offered to Aqua, who would then continue to serve their 77 current potable
water customers. Duke Energy is recommending that the household on Plant Allen Road be
offered a water treatment system (labeled as property 195 in the Dewberry evaluation, with the
potential water main shown as being run along Boat Club Road).
The City of Belmont already has municipal lines located along South Point Road and Armstrong
Road; therefore, some of the households would require only service lines. Water line
extensions would be required along Canal Road (approximately 475 feet); Wildfire Lane (and
remaining roads in the subdivision with the furthest household approximately 1,750 feet from the
current main); Warren Drive (and remaining roads in the subdivision with the furthest household
approximately 1,475 feet from the main); Lake Mist Drive (and remaining roads in the
subdivision with the furthest household approximately 1,460 feet from the main); Wingpoint
Drive (and remaining roads in the subdivision with furthest household approximately 3,500 feet
from the main), and Reese Wilson Road (and remaining roads in the subdivision, with the
furthest household approximately 4,660 feet from the main).
�� ENI ERRGY.

Permanent Water Supply Proposal to DEQ -Allen
A water treatment system is being recommended for the household on Plant Allen Road. While
the City of Belmont did not indicate any issues related to water quality for the system as a
whole, serving one household at the end of a 3,000-foot line down Boat Club Road may result in
water quality concerns due to low water usage. Also, running a municipal line to just this one
household is estimated at $212,000. The cost estimate indicates that running the line to this
household is cost prohibitive. Total costs shown in the table below exclude costs associated
with running a public water supply line to this location; therefore, the costs below are different
than the costs included in Appendix D of the Dewberry evaluation.
Estimates prepared by Dewberry, in conjunction with design information provided by the local
water municipality, have revealed that the three Aqua wells and at least 130 of the remaining
eligible households must accept connection to the public water supply for such connection to be
cost-effective. Accordingly, Duke Energy proposes that if less than 130 eligible households and
the three Aqua wells accept a connection to a public water supply, then Duke Energy will
reevaluate the system and propose an alternative proposal to NCDEQ. Dewberry's cost
estimate also assumes that Aqua North America will have an interconnect to the City of Belmont
and will continue to serve their customers through the interconnected system. If the Cityof
Belmont requires Aqua to replace the existing water distribution system and the system
becomes cost prohibitive, Duke Energy will notify NCDEQ.
From initial discussions with the City of Belmont and an evaluation of the system by Dewberry,
the City of Belmont has adequate water capacity and the water quality could be maintained
utilizing their current flushing schedule. The cost estimate includes the installation of automatic
flushing devices. The City of Belmont did indicate concerns over maintaining desirable
customer pressure in the southern part of their system, but Dewberry's evaluation concluded
that adding the households in this proposed plan would not adversely affect the overall water
pressure in the system.
The performance standard for the public water system is the Federal MCLs. The performance
standard for the water treatment system is also the Federal MCLs except for those constituents
identified in 2015 as having potential health concerns: arsenic, hexavalent chromium, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
standard will be either one-half of the MCL, or the appropriate state standard, whichever is more
protective.
Duke Energy is currently evaluating an ion filtration treatment system; this system has been
successfully installed in other parts of the state, and initial results show it performs well in
reducing vanadium and hexavalent chromium, among other constituents. The costs shown
below are for a conceptual ion filtration treatment system. The final water treatment system will
be based upon the results of field studies.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of additional households will be identified during the initial outreach effort
conducted upon approval of this plan by NCDEQ. If the final number of households, or the final
number of households opting for public water supply, results in a conclusion different than those
stated in this preliminary plan, Duke Energy will revise and submit the new plan to NCDEQ for
�' ENERGY.

Permanent Water Supply Proposal to DEQ -Allen
evaluation and approval. Also, the estimate assumes one public water connection (i.e. meter
box) per parcel; for parcels containing two households, the number of connections will be
determined based upon negotiations between the well owner(s) and the municipality. Well
owners will be responsible for making the decision for their parcels. Only households within the
Yz mile boundary and served by well water at the time of the submittal of this plan will be eligible
for a permanent water supply as part of HB630.
The Dewberry evaluation includes a project schedule based on their past experience installing
public water systems. This preliminary project schedule indicates that a permanent water
supply will be available by September 2018. Upon submittal of this plan to NCDEQ, Duke
Energy will begin negotiations with the local municipality and a more detailed schedule will be
developed. If the municipality's schedule shows an implementation date extending beyond
October 15, 2018, Duke Energy will request an extension and look at whether other contingency
measures need to be implemented.
*-,DUKE
V ENERGY.

Permanent Water Supply Proposal to DEQ - Alien
Public Water Supply
Ion Filtration Water
Connection
Treatment System
Total Number Recommended
_
271 households,3
t 1
community supply wells
Water Quaft Criteria
Meets applicable water quality
Yes
Yes
standards Federal MCLs
Completion Schedule
—
Estimated completion date
09/2018
0812017
Request extension to 10/2019
Contingency factors
and/or install water treatment
NIA
stems until One is complete
Operational Considerations
Required acceptance level to
achieve consistent water quality and
t N/A
NIA
supply-
Required acceptance level to
achieve targeted cost per eligible
M/6 (4 80 households plus 3
N/A
household <$35k/househol
Aqua wells)
Location of households relative to
200 R — 4,660 ft
existing municipal water Tines
0.04 miles — 0.88 miles ._
N/A
Only household on road
Assumes interconnect
Other considerations
between Aqua system and
to be connected to new
City of Belmont
waterline
Costs
--
Total Installation Costs
$7,2258,000
$7 000 - $10 000
Approximate cost per eligible
household
$26,800
$7,000 - $10,000
Annual Maintenance Costs
NIA
$500 - $2 000
Maintenance cost per household
_ NIA
$500 - $2,000
annual
Non -Duke Costs
Total estimated water bills month
$21,o92
N/A
Estimated water bills monthly per
household ( Aqua O&M surcharge is
$73, $90 Aqua customers
N/A
estimated
Ongoing municipality costs for
maintenance and flushing due to
TBD
N/A
low-flow/low-usa
Total Costs
Duke and Non -Duke
Total estimated cost for all eligible
neighbors over 10ears
$9,789,040
$12,000 - $30,000
Total estimated cost for each eligible
_
neighbors over 10 years
$35,120
$12,000 - $30,000
DUKE
ENERGY.

Permanent Water Supply Proposal to DEQ — Beleivs Creek
Belews Creek Steam Station
Stokes County
58 eligible households
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309.21 1 (cl) of House Bill
630. Households were designated as "eligible" if any portion of a parcel of land crossed the''Y2
mile compliance buffer described in HB630 and if the household currently utilized well water or
bottled water (under Duke Energy's bottled water program) as the drinking water source.
Although HB630 indicates that households are to be covered, Duke Energy has included two (2)
schools/churches and one (1) business as eligible locations. Undeveloped parcels were
identified but were not considered "eligible" because groundwater wells are not currently utilized
as a drinking source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and a preliminary
engineering evaluation, cost estimate and schedule. Dewberry's report, for the most part,
assumes one metered connection per parcel; therefore, multiple homes may be serviced by one
connection. The total count in this proposed plan includes all final connections.
During their evaluation, Dewberry recommended that 19 of the eligible households be excluded
from the municipal water line evaluation. In order to connect those households, the public water
supply line would require crossing a large water canal and a bridge crossing, both of which
would be technically complicated, time consuming and costly. These 19 homes were excluded
from the Dewberry cost estimate.
The Town of Walnut Cove purchases water from the Winston-Salem/Forsyth County Utilities
through Stokes County and has conceptually agreed to allow for another interconnect with
Stokes County to provide water to the households around the Belews Creek Station. System
modifications including a pressure boosting station and additional disinfection may be required
to provide water at a sufficient pressure and quality.
While the closest existing municipal line terminates at the intersection of Martin Luther King Jr.
Road and Crestview Drive, Dewberry has determined that the current water main on Martin
Luther King Jr. Road would need to be replaced starting at the intersection of this road with NC-
65. The closest new household connection is approximately 16,500 feet (3.1 miles) from the
intersection of Martin Luther King Jr. Road and NC-65. The furthest household, located on
Middleton Loop, is approximately 22,000 feet (4.2 miles) from the intersection.
The estimated cost to provide a municipal line to the 39 households is $4,800,000, or $123,000
per household. The Dewberry evaluation includes a project schedule based their past
experience installing public water systems. This preliminary project schedule indicates that a
public water supply could be available through the Town of Walnut Cove by December 2018,
which does not meet the October 2018 deadline.
('.DUKE
` ENERGY.

Permanent Water Supply Proposal to DEQ — Beleivs Creek
Based on the results of the Dewberry evaluation, the concerns over water line pressure and the
additional disinfection needed, and the overall construction costs, Duke Energy proposes that all
58 households be offered a water treatment system.
The performance standard for the public water system is the Federal MCLs. The performance
standard for the water treatment system is also the Federal MCLs except for those constituents
identified in 2015 as having potential health concerns: arsenic, hexavalent chromium, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
standard will be either one-half of the MCL or the appropriate state standard, whichever is more
protective.
Duke Energy is currently evaluating an ion filtration treatment system; this system has been
successfully installed in other parts of the state, and initial results show it performs well in
reducing vanadium and hexavalent chromium, among other constituents. The costs shown
below are for a conceptual ion filtration treatment system. The final water treatment system will
be based upon the results of field studies.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of additional households will be identified during the initial outreach effort
conducted upon approval of this plan by NCDEQ. If the final number of households results in a
conclusion different than those stated in this preliminary plan, Duke Energy will revise and
submit the new plan to NCDEQ for evaluation and approval. Well owners will be responsible for
making the decision for their parcels. Only households within the Y2 mile boundary and served
by well water at the time of the submittal of this plan will be eligible for a permanent water
supply as part of HB630.
rhj DUKE
i ENERGY.

Permanent Water Supply Proposal to DEQ - Be/ews Creek
Ion Filtration Water
Treatment System
Total Number Recommended
58
Water Quality Criteria
Meets applicable water quality
Yes
standards Federal MCLs
Completion Schedule
Estimated completion date
i 1212017
Contingency factors
N/A
Operational Considerations
Required acceptance level to
achieve consistent water
N/A
cluality and s
Required acceptance level to
achieve targeted cost per
N/A
eligible household
a$35k/househol
Location of households
relative to existing municipal
N/A
water lines
Other considerations
Costs
Total Installation Costs,
00a- 580 OOD
Approximate cost per eligible
$7,000 - $10,000
household
Annual Maintenance Costs
$29 000 - $116 000
Maintenance cost per
household annually
$500 - $2,000
Non -Duke Costs
Total estimated water bills
monthly
N/A
Estimated water bills monthly
per household
Ongoing municipality costs for
N/A
_
maintenance and flushing due
N/A
to low-flow/low-usage
Total Costs
_
(Duke and Non -Duke) i
Total estimated cost for all
eligible neighbors over 10
$695,000-
Years
$1,740,00
Total estimated cost for each
eligible neighbors over 10
Dears
$12,000-$30,000
1
(DUKE
k ENERGY.

Permanent Water Supply Proposal to DEQ- Buck
Buck Steam Station
Rowan County
189 eligible households
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309.21 1 (cl) of House Bill
630. Households were designated as "eligible" if any portion of a parcel of land crossed the
mile compliance buffer described in HB630 and if the household currently utilized well water as
the drinking water source. Although HB630 indicates that households are to be covered, Duke
Energy has included four (4) parcels that are schools and/or churches within the eligible listing.
Undeveloped parcels were identified but were not considered "eligible" because wells are not
currently utilized as a drinking source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and preliminary
engineering evaluation, cost estimate and schedule. Dewberry's report, for the most part,
assumes one metered connection per parcel; therefore, multiple homes may be serviced by one
connection. The total count in this proposed plan includes all final connections.
Based on the results of the Dewberry evaluation and the factors below, Duke Energy proposes
that 188 eligible households and/or schools near Buck be offered the option of a connection to a
public water supply or installation of a water treatment system, and one (1) eligible household
(identified as household 256 in the Dewberry evaluation) be offered a water treatment system.
The closest existing Salisbury Rowan Utilities (SRU) line is located near the intersection of 1-85
and Long Ferry Road. The closest household is approximately 4,700 feet (0.89 miles) from the
current line. The furthest household is approximately 15,000 feet (2.84 miles) from the current
line. It should also be noted that Rowan County already has had discussions with a number of
households on expanding the water distribution system in the vicinity of the Buck Steam Station.
A water treatment system is being recommended for household 256, located off of Leonard
Road, due to concern over water quality as the distance between that household and the next
closest household being offered municipal water is approximately 4,800 feet (0.91 miles); this is
also the household that is furthest from the current line. The cost to run the water line to this
home is approximately $389,000. Total costs shown in the table below exclude costs
associated with running a public water supply line to household 256; therefore the costs below
are different than the costs included in Appendix D of the Dewberry evaluation. If household
256 is excluded from the public water installation, the furthest household is approximately
14,500 feet (2.75 miles) from the current line.
Estimates prepared by Dewberry, in conjunction with design information provided by the local
water municipality, have revealed that at least 142 of eligible households must accept
connection to the public water supply for such connection to ensure a long-term, high quality
water supply and to be cost effective. Accordingly, Duke Energy proposes that if fewer than 142
of households around the plant accept a connection to a public water supply, then all eligible
��DUKE
ENERGY.

Permanent Water Supply Proposal to DEQ - Suck
households near the plant be offered installation and maintenance of a water treatment system
to ensure water safety related to quality issues that can arise with low water usage.
From initial discussions with Rowan County and SRU and an evaluation of the system by
Dewberry, additional flushing of the line may be required to maintain water quality due to the
number of households connected to each line. The amount of flushing required, and whether
water quality would be maintained on a line with minimal connections, will continue to be
evaluated with Rowan County and SRU as Duke Energy receives feedback from well owners on
their preferred method of permanent replacement water supply. Also, since this will be a new
system for Rowan County, the monthly water rate will be dependent upon the number of
households which choose to be connected to the municipal line.
The performance standard for the public water system is the Federal MCLs. The performance
standard for the water treatment system is also the Federal MCLs except for those constituents
identified in 2015 as having potential health concerns: arsenic, hexavalent chromium, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
standard will be either one-half of the MCL, or the appropriate state standard, whichever is more
protective.
Duke Energy is currently evaluating an ion filtration treatment system; this system has been
successfully installed in other parts of the state, and initial results show it performs well in
reducing vanadium and hexavalent chromium, among other constituents. The costs shown
below are for a conceptual ion filtration treatment system. The final water treatment system will
be based upon the results of field studies.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of additional households will be identified during the initial outreach effort
conducted upon approval of this plan by NCDEQ. If the final number of households, or the final
number of households opting for municipal water supply, results in a conclusion different than
those stated in this preliminary plan, Duke Energy will revise the plan and submit the pertinent
information to NCDEQ for evaluation and approval. Also, the estimate assumes one public
water connection (i.e. meter box) per parcel; for parcels containing two households, the number
of connections will be determined based upon negotiations between the well owner(s) and the
municipality. Well owners will be responsible for making the decision for their parcels. Only
households within the mile boundary and served by well water at the time of the submittal of
this plan will be eligible for a permanent water supply as part of 1-18630.
The Dewberry evaluation includes a project schedule based on Dewberry's past experience
installing public water systems. This preliminary schedule indicates that a permanent water
supply will not be available until November 2018, which does not meet the October 15, 2018
deadline in HB630. Upon submittal of this plan to NCDEQ, Duke Energy will begin negotiations
with Rowan County and a more detailed schedule will be developed. If Rowan County's
schedule continues to show an implementation date extending beyond October 15, 2018, Duke
Energy will request an extension and look at whether other contingency measures need to be
implemented.
�� ENERGY.

Permanent Water Supply Proposal to DEQ - Back
I Public Water Supply
Ion Filtration Water
Connection
Treatment System
Total Number Recommended
Water Quality Criteria
Meets applicable water quality
standards (Federal MCLs)
Yes
Yes
—`
Completion Schedule
Estimated completion date
11/2018
06/2017
Request extension to 1012D19
Contingency factors
and/or install water treatment
N/A
stems until line is complete
erational Considerations
Required acceptance level to
achieve consistent water quality and
N/A per SRU but will continue
j
N/A
supply
to be evaluated
Required acceptance level to
— ------ —
achieve targeted cost per eligible
76% (142 households)
N/A
household (<$35k/hous0o1d)
Location of households relative to
existing municipal water lines
O,gg _ 275 miles
N/A
A water line project is already
Approx 0.91 miles from
Other considerations
planned for portions of this
closest proposed
community
munic al connection
Costs
..-._. _._.._
Total Installation Costs
$4 970 000
$7 000 - $10 000
Approximate cost per eligible
household
$26,200
$7,000-$10,000
Annual Maintenance Costs
N/A
$500 - $ 000
Maintenance cost per household i
annually
N/A
$500 - $2,000
Non -Duke Costs
Total estimated water bills monthly
$9,400
N/A
Estimated water bills monthly per
household
$50
NIA
Ongoing municipality costs for
maintenance and flushing due to
TBD
N/A
low-flow/low-usage
Total Costs
Duke and Non -Duke
Total estimated cost for all eligible
neighbors over 10 years
$6,098,000
$12,000 - $30,000
Total estimated cost for each eligible
net hbors over 10 ears
$32 400
$12 D00 - $30,O00
`��DU KE
ENERGY.

Permanent Water Supply Proposal to DEQ — Cape Fear
Cape Fear Steam Station
Chatham County
4 eligible households
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309.211(cl) of House Bill
630. Households were designated as "eligible" if any portion of a parcel of land crossed the
mile compliance buffer described in HB630 and if the household currently utilized well water or
bottled water (under Duke Energy's bottled water program) as the drinking water source.
Undeveloped parcels were identified but were not considered "eligible" because groundwater
wells are not currently utilized as a drinking source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and a preliminary
engineering evaluation, cost estimate and schedule. Dewberry's report, for the most part,
assumes one metered connection per parcel; therefore, multiple homes may be serviced by one
connection. The total count in this proposed plan includes all final connections.
Based on the results of the Dewberry evaluation and the factors below, Duke Energy proposes
that the four (4) eligible households near Cape Fear be offered the option of a connection to a
public water supply or the installation of a water treatment system.
Chatham County already has a municipal line located along Corinth Road; therefore the
households would require only service lines, ranging from approximately 140 feet to 800 feet.
Since only service lines are required, no minimum number is needed for the installations to
remain cost-effective.
From initial discussions with Chatham County and evaluation of the system by Dewberry, the
current system has adequate water capacity and the water quality could be maintained with the
addition of the eligible households.
The performance standard for the public water system is the Federal MCLs. The performance
standard for the water treatment system is also the Federal MCLs except for those constituents
identified in 2015 as having potential health concerns: arsenic, hexavalent chromium, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
standard will be either one-half of the MCL, or the appropriate state standard, whichever is more
protective.
Duke Energy is currently evaluating an ion filtration treatment system; this system has been
successfully installed in other parts of the state, and initial results show it performs well in
reducing vanadium and hexavalent chromium, among other constituents. The final water
treatment system will be based upon the results of field studies.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of additional households will be identified during the initial outreach effort
:(� DUKE
~ ' ENERGY.

Permanent Water Supply Pruposal to DEQ — Cape Fear
conducted upon approval of this plan by NCDEQ. If the final number of households, or the final
number of households opting for public water supply, results in a conclusion different than those
stated in this preliminary plan, Duke Energy will revise and submit the new plan to NCDEQ for
evaluation and approval. Also, the estimate assumes one public water connection (i.e. meter
box) per parcel; for parcels containing two households, the number of connections will be
determined based upon negotiations between the well owner(s) and the municipality. Well
owners will be responsible for making the decision for their parcels. Only households within the
'/2 mile boundary and served by well water at the time of the submittal of this plan will be eligible
for a permanent water supply as part of HB630.
The Dewberry evaluation includes a project schedule based on their past experience installing
public water systems. The preliminary project schedule indicates that a permanent water supply
will be available by May 2017. Upon submittal of this plan to NCDEQ, Duke Energy will begin
negotiations with the local municipality and a more detailed schedule will be developed. The
schedule will also depend on the time required to educate the eligible households on their
choices. If the installation schedule shows an implementation date extending beyond October
15, 2018, Duke Energy will request an extension and look at whether other contingency
measures need to be implemented.
,(-� DUKE
VENERGY.

Permanent Water Supply Proposal to DEQ— Cape Fear
Public Water Supply
Connection
Total Number Recommended
4
WaterQuali Criteria
Meets applicable water quality
standards Federal MCLs
Yes
Completion Schedule
Estimated com letion date
05/2017
Request extension to 102019
Contingency factors
and/or install water treatment
stem until line is complete
Operational Considerations
Required acceptance level to
achieve consistent water quality and
N/A
s
Required acceptance level to
achieve targeted cost per eligible
N/A
household <$35k/household
Location of households relative to
municipal water lines
140 it — 800 It.existi
Other considerations
Costs
Total Installation Costs
$76 000
Approximate cost per eligible
household
$19,000
Annual Maintenance Costs
N/A
Maintenance cost per household
annual)
N/A
Non -Duke Costs
Total estimated water bills month
$200
Estimated water bills monthly per
household
$50
Ongoing municipality costs for
maintenance and flushing due to
NIA
low-flow/low-usage
Total Costs
Duke and Non -Duke
Total estimated cost for all eligible
nei hbors over 10 ears
$100,000
Total estimated cost for each eligible
$25;OD0
nei hbors over 10 ears
'V EENR Y.

Permanent Water Supply Proposal to DEQ— Dan River
Dan River Steam Station
Rockingham County
1 eligible household
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309.211(cl) of House Bill
630. Households were designated as "eligible" if any portion of a parcel of land crossed the''/s
mile compliance buffer described in HB630 and if the household currently utilized well water or
bottled water (under Duke Energy's bottled water program) as the drinking water source.
Undeveloped parcels were identified but were not considered "eligible" because groundwater
wells are not currently utilized as a drinking source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and a preliminary
engineering evaluation and cost estimate.
Based on the results of the Dewberry evaluation and the factors below, Duke Energy proposes
that the one eligible household near the Dan River Station be offered the option of a connection
to a public water supply or the installation of a water treatment system.
The City of Eden already has a municipal line located along South Edgewood Road; therefore
the household would require only a service line of approximately 300 feet.
From discussions with the City of Eden and evaluation of the system by Dewberry, the current
system has adequate water capacity and the water quality could be maintained with the addition
of the eligible household.
The performance standard for the public water system is the Federal MCLs. The performance
standard for the water treatment system is also the Federal MCLs except for those constituents
identified in 2015 as having potential health concerns: arsenic, hexavalent chromium, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
standard will be either one-half of the MCL, or the appropriate state standard, whichever is more
protective.
Duke Energy is currently evaluating an ion filtration treatment system; this system has been
successfully installed in other parts of the state, and initial results show it performs well in
reducing vanadium and hexavalent chromium, among other constituents. The final water
treatment system will be based upon the results of field studies.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of additional households will be identified during the initial outreach effort
conducted upon approval of this plan by NCDEQ. If the final number of households, or the final
number of households opting for public water supply, results in a conclusion different than those
stated in this preliminary plan, Duke Energy will revise and submit the new plan to NCDEQ for
evaluation and approval. Well owners will be responsible for making the decision for their
*-.,DUKE
ENERGY.

Permanent Water Supply Proposal to DEQ — Dan River
parcels. Only households within the''/a mile boundary and served by well water at the time of
the submittal of this plan will be eligible for a permanent water supply as part of H6630.
The Dewberry evaluation did not include a project schedule since only a service line connection
is required, but it is anticipated that the service line can be installed before August 2017.
Public Water Supply
Connection
Total Number Recommended
1
Water Quality Criteria
Meets applicable water quality
standards federal MCLO
Yes
Completion Schedule
_
Estimated completion date
08/2017
Request extension to 10/2019
Contingency factors
and/or install water treatment
_Elfstern
until line is complete
erational Considerations
Required acceptance level to
j
achieve consistent water quality and
N/A
supely
Required acceptance level to
achieve targeted cost per eligible
N/A
household <$35k/household
Location of households relative to
munic' al water lines
300 ft.existi
Other considerations
Costs
Total Installation Costs
$9,000
Approximate cost per eligible
household
$g,ODO
Annual Maintenance Costs
N/A
Maintenance cost per household
annual)
N/A
Non -Duke Costs
Total estimated water bills month[
$55
Estimated water bills monthly per
household
$55
Ongoing municipality costs for
maintenance and flushing due to
TBD
low-flow/low-us e
Total Costs
Duke and Non -Duke
Total estimated cost for all eligible
neighbors over 10 ears
$15,600
Total estimated cost for each eligible
neighbors over 10 ears
$15 600
" ER P EENERGY.

Permanent Water Supply Proposal to DEQ — HF Lee
HF Lee Steam Station
Wayne County
42 eligible households
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309,21 1 (cl) of House Bill
630. Households were designated as "eligible" if any portion of a parcel of land crossed the 1/
mile compliance buffer described in H8630 and if the household currently utilized well water or
bottled water (under Duke Energy's bottled water program) as the drinking water source.
Undeveloped parcels were identified but were not considered "eligible" because groundwater
wells are not currently utilized as a drinking source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and a preliminary
engineering evaluation, cost estimate and schedule. Dewberry's report, for the most part,
assumes one metered connection per parcel; therefore, multiple homes may be serviced by one
connection. The total count in this proposed plan includes all final connections.
Based on the results of the Dewberry evaluation and the factors below, Duke Energy proposes
that all 42 eligible households near HF Lee be offered the option of a connection to a public
water supply or the installation of a water treatment system.
The Fork Township Sanitary District already has a municipal line located along Old Smithfield
Road, Pate Circle, Friendly Drive, Rosewood Road, and Ferry Bridge Road; therefore the
majority of the households would require only service lines. A water line extension would be
required along Rosewood Road (approximately 1800 feet).
Estimates prepared by Dewberry, in conjunction with design information provided by the local
water municipality, have revealed that at least 26 eligible households must accept connection to
the public water supply for such connection to be cost-effective. Accordingly, Duke Energy
proposes that if less than 26 households around the plant accept a connection to a public water
supply, then all eligible households near the plant be offered installation and maintenance of a
water treatment system to ensure a cost effective, long-term high quality water supply.
From initial discussions with the Fork Township Sanitary District and evaluation of the system by
Dewberry, the current system has adequate water capacity and the water quality could be
maintained with the addition of the eligible households.
The performance standard for the public water system is the Federal MCLs. The performance
standard for the water treatment system is also the Federal MCLs except for those constituents
identified in 2015 as having potential health concerns: arsenic, hexavalent chromium, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
standard will be either one-half of the MCL, or the appropriate state standard, whichever is more
protective.
��DUKE
ENERGY.

Permanent Water SupP41' Proposal to DEQ — IIF Lee
Duke Energy is currently evaluating an ion filtration treatment system; this system has been
successfully installed in other parts of the state, and initial results show it performs well in
reducing vanadium and hexavalent chromium, among other constituents. The final water
treatment system will be based upon the results of field studies.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of additional households will be identified during the initial outreach effort
conducted upon approval of this plan by NCDEQ. If the final number of households, or the final
number of households opting for public water supply, results in a conclusion different than those
stated in this preliminary plan, Duke Energy will revise and submit the new plan to NCDEQ for
evaluation and approval. Also, the estimate assumes one public water connection (i.e. meter
box) per parcel; for parcels containing two households, the number of connections will be
determined based upon negotiations between the well owner(s) and the municipality. Well
owners will be responsible for making the decision for their parcels. Only households within the
'/z mile boundary and served by well water at the time of the submittal of this plan will be eligible
for a permanent water supply as part of HB630.
The Dewberry evaluation includes a project schedule based on their past experience installing
public water systems. The preliminary project schedule indicates that a permanent water supply
will be available by February 2018. Upon submittal of this plan to NCDEQ, Duke Energy will
begin negotiations with the local municipality and a more detailed schedule will be developed. If
the municipality's schedule shows an implementation date extending beyond October 15, 2018,
Duke Energy will request an extension and look at whether other contingency measures need to
be implemented.
Fork Township Sanitary District does have one water supply well located within the '/z mile
compliance buffer. Through discussions with Fork Township, the water from this supply well is
combined with water supplied from other wells outside the'/z mile compliance buffer and treated
in their treatment plant before it is enters their distribution system. While the water from this
supply well is already treated by a municipal water system, Duke Energy is recommending that
the one water supply well located inside the'/z mile compliance buffer be abandoned and a new
well be installed at a location amenable to the Fort Township Sanitary District. A time frame will
be developed with Fork Township and shared with DEQ once developed.
� ENERGY.

Permanent Water Supply Proposal to DEQ— HFLee
Public Water Supply
Connection
Total Number Recommended
42
Water Qual& Criteria
Meets applicable water quality
Yes
standards Federal MCLs
Completion Schedule
Estimated completion date
02/20,18
Request extension to 10/2019
Contingency factors
and/or install watertreatment
stem until line is complete
Operational Considerations
Required acceptance level to
achieve consistent water quality and
N/A
supply
Required acceptance level to
_
achieve targeted cost per eligible
62% (26 households)
household <$35k/hcusehol
Location of households relative to
200 it. —1,800 fl.
existingmunicipal water lines
D.D4 miles — 0.34 miles
Other considerations
Costs
Total Installation Costs
1 $920 000
Approximate cost per eligible
household
$22,OD0
Annual Maintenance Costs
N/A
Maintenance cost per household
annually
N/A
Non -Duke Costs
Total estimated water bills month
$1 344
Estimated water bills monthly per
household
$32
Ongoing municipality costs for
maintenance and flushing due to
TBD
low-flow/low-usage
Total Costs
Duke and Non -Duke
Total estimated cost for all eligible
$1,081,280
np hbors over 10 years
Total estimated cost for each eligible
neighbors over10 ears
$2b,740
& DUKE
VENERGY.

Permanent Water Supply Proposal to DEQ - Marshall
Marshall Steam Station
Catawba County
127 eligible households
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309.21 1 (cl) of House Bill
630. Households were designated as "eligible" if any portion of a parcel of land crossed the 1/2
mile compliance buffer described in HB630 and if the household currently utilized well water or
bottled water (under Duke Energy's bottled water program) as the drinking water source.
Although HB630 indicates that households are to be covered, Duke Energy has included six (6)
businesses, two (2) industrial facilities, and two (2) schools/churches as eligible locations.
Undeveloped parcels were identified but were not considered "eligible" because groundwater
wells are not currently utilized as a drinking source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and a preliminary
engineering evaluation, cost estimate and schedule. Dewberry's report, for the most part,
assumes one metered connection per parcel; therefore, multiple homes may be serviced by one
connection. The total count in this proposed plan includes all final connections.
Based on the results of the Dewberry evaluation and the factors below, Duke Energy proposes
that 125 eligible households, business and schools/churches near Marshall be offered the
option of a connection to a public water supply or the installation of a water treatment system,
and the two (2) industrial locations (located on Steamplant Road, labeled as 147 and 148 in the
Dewberry evaluation) be offered a water treatment system.
The City of Hickory already has a municipal line located along Sherrills Ford Road; therefore the
majority of the households would require only service lines. Water line extensions would be
required along Mollys Backbone Road (approximately 175 feet), Steamplant Road
(approximately 500 feet), Gregory Road (approximately 650 feet), Marshall Road (approximately
1700 feet), and Greenwood Road to Clement Circle (approximately 1800 feet).
A water treatment system is being recommended for the two industrial locations on Steamplant
Road. Providing potable water to these locations would require installing a water main under an
existing railroad track, a challenging and timely endeavor. The estimated cost to provide a
municipal water line just to these two locations is $300,000, or $150,000 each. Removing the
railroad crossing from the public water line construction scope would remove two months or
more from the overall schedule. Total costs shown in the table below exclude costs associated
with running a public water supply line to these locations; therefore, the costs below are different
than the costs included in Appendix D of the Dewberry evaluation.
Estimates prepared by Dewberry, in conjunction with the design information provided by the
local water municipality, have revealed that at least 83 eligible households must accept
connection to the public water supply for such connection to be cost-effective. Accordingly,
Duke Energy proposes that if less than 83 households around the plant accept a connection to
�� ENERGY.

Permanent Water Supply Proposal to DEQ - Marshall
a public water supply, then all eligible households near the plant be offered installation and
maintenance of a water treatment system to ensure a cost effective, long-term high quality
water supply.
From initial discussions with the City of Hickory and an evaluation of the system by Dewberry,
the City of Hickory has adequate water capacity and the water quality could be maintained
utilizing their current standard weekly flushing schedule.
The performance standard for the public water system is the Federal MCLs. The performance
standard for the water treatment system is also the Federal MCLs except for those constituents
identified in 2015 as having potential health concerns: arsenic, hexavalent chromium, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
standard will be either one-half of the MCL, or the appropriate state standard, whichever is more
protective.
Duke Energy is currently evaluating an ion filtration treatment system; this system has been
successfully installed in other parts of the state, and initial results show it performs well in
reducing vanadium and hexavalent chromium, among other constituents. The costs shown
below are for a conceptual ion filtration treatment system. The final water treatment system will
be based upon the results of field studies.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of additional households will be identified during the initial outreach effort
conducted upon approval of this plan by NCDEQ. If the final number of households, or the final
number of households opting for public water supply, results in a conclusion different than those
stated in this preliminary plan, Duke Energy will revise and submit the new plan to NCDEO for
evaluation and approval. Also, the estimate assumes one public water connection (i.e. meter
box) per parcel; for parcels containing two households, the number of connections will be
determined based upon negotiations between the well owner(s) and the municipality. Well
owners will be responsible for making the decision for their parcels. Only households within the
'/2 mile boundary and served by well water at the time of the submittal of this plan will be eligible
for a permanent water supply as part of HB630.
The Dewberry evaluation includes a project schedule based on their past experience installing
public water systems. This preliminary project schedule indicates that a permanent water
supply will be available by September 2018. If the railroad crossing on Steamplant Road is
removed from the schedule, permanent water would be provided by July 2018, ahead of the
October 15, 2018 deadline in HB630. Upon submittal of this plan to NCDEQ, Duke Energy will
begin negotiations with the local municipality and a more detailed schedule will be developed. If
the municipality's schedule shows an implementation date extending beyond October 15, 2018,
Duke Energy will request an extension and look at whether other contingency measures need to
be implemented.
��DUKE
ENERGY.

Permanent Water Supply Proposal to DEQ - Marshall
Public Water Supply
ton Fittration Water
Connection
Treatment S stem
Total Number Recommended
125
2
Water Quality Criteria
Meets applicable water quality
Yes
Yes
standards Federal MCLs
Completion Schedule
Estimated co letion date
07/2018
08/2017
Request extension to 1012019
Contingency factors
and/or install water treatment
N/A
system until line is complete
Operational Considerations
Required acceptance level to
achieve consistent water quality and
NIA
NIA
supply
Required acceptance level to
—
achieve targeted cost per eligible
66% (83 households) NIA
__household j<S35k/household
Location of households relative to
200 ft. —1,800 R
existingmunicipal water lines
fh(14 miles — 0,34 miles
N/A
T
Would have to cross a
Other considerations
railroad to serve these
two sites with public
water
Costs
Total Installation Costs
$ 920.000
$14 0Q0 - $20 000
Approximate cost per eligible
household
$23,400
$7,000 - $10,000
Annual Maintenance Costs
N/A
$1000 - $4 000
Maintenance cost per household
annual)
NIA
$500 - $2,000
Non -Duke Costs
Total estimated water bills monthly
$8,125
N/A
Estimated water bills monthly per
household
$65
N/A
Ongoing municipality costs for
maintenance and flushing due to
TBD
N/A
low-flow/low-usage
Total Costs
Duke and Non -Duke
Total estimated cost for all eligible
$3,895,000
$24,000 - $60,000
neighbors over 10 ears
Total estimated cost for each eligible
neighbors over 10 years
$31,160
$12,000 - $30,000
'�� ENERGY.

Permanent Water Supply Proposal to DEQ - Maya
Mayo Steam Station
Person County
22 eligible households
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309.211(0) of House Bill
630, Households were designated as "eligible" if any portion of a parcel of land crossed the 1/2
mile compliance buffer described in HB630 and if the household currently utilized well water or
bottled water (under Duke Energy's bottled water program) as the drinking water source.
Although HB630 indicates that households are to be covered, Duke Energy has included one
(1) business as an eligible location. Undeveloped parcels were identified but were not
considered "eligible" because groundwater wells are not currently utilized as a drinking source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and a preliminary
engineering evaluation, cost estimate and schedule. Dewberry's report, for the most part,
assumes one metered connection per parcel; therefore, multiple homes may be serviced by one
connection. The total count in this proposed plan includes all final connections.
The City of Roxboro indicated that they had water quality concerns with providing water to any
of the eligible households within the 1/2 mile boundary due to low water demand and the
residence time of the water in the pipeline, but they would be open to providing water service to
the eight (8) households south of the Steam Station. They indicated that it would not be feasible
to provide potable water to the 14 households north of the station, including those in Virginia.
The closest existing City of Roxboro municipal line is located near the intersection of Boston
Rd/Hwy 501 and Old US Highway 501. The closest household is approximately 3,000 feet (0.6
miles) from the current line. The furthest household is approximately 5,300 feet (1 mile) from
the current line.
The estimated cost to provide a municipal line to the eight (8) households south of the station is
$1,200,000, or $150,000 per household. The Dewberry evaluation includes a project schedule
based on their past experience installing public water systems. The preliminary project
schedule indicates that a permanent water supply could be available through the City of
Roxboro by August 2018.
Based on the results of the Dewberry evaluation, the concerns raised by the City of Roxboro on
water quality, and the overall construction costs, Duke Energy proposes that all 22 households
be offered a water treatment system.
The performance standard for the public water system is the Federal MCLs. The performance
standard for the water treatment system is also the Federal MCLs except for those constituents
identified in 2015 as having potential health concerns: arsenic, hexavalent chromium, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
�� ENERGY.

Permanent Water Supply Proposal to DEQ - Maya
standard will be either one-half of the MCL or the appropriate state standard, whichever is more
protective.
Duke Energy is currently evaluating an ion filtration treatment system; this system has been
successfully installed in other parts of the state, and initial results show it performs well in
reducing vanadium and hexavalent chromium, among other constituents. The costs shown
below are for a conceptual ion filtration treatment system. The final water treatment system will
be based upon the results of field studies.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of additional households will be identified during the initial outreach effort
conducted upon approved of this plan by NCDEQ. If the final number of households results in a
conclusion different than those stated in this preliminary plan, Duke Energy will revise and
submit the new plan to NCDEQ for evaluation and approval. Well owners will be responsible for
making the decision for their parcels. Only households within the Ys mile boundary and served
by well water at the time of the submittal of this plan will be eligible for a permanent water
supply as part of HB630.
�� DUKE
VC ENERGY.

Permanent Water Supply Proposal to AEQ - Mayo
Ion Filtration Water
§Xstem
Total Number Recommended
_Treatment
22
Water Quality Criteria
Meets applicable water quality
Yes
standards (Federal MCLs
Completion Schedule
Estimated 00TEletion date
12l2017
Contingency factors
NIA
Operational Considerations
Required acceptance level to
achieve consistent water
N/A
quality and s
Required acceptance level to
achieve targeted cost per
NIA
eligible household
(<$35k/household)
Location of households
relative to existing municipal
NIA
water lines
Other considerations
Costs
Total Installation Costs l
$154 000 - $220,000
Approximate cost per eligible
$7 000 - $10,000
household
Annual Maintenance Costs
$11,000 - $44 000
Maintenance cost per
$500 - $2,000
household annually
Non -Duke Costs
Total estimated water ills
N/A
month
Estimated water bills monthly
_
NIA
r household
Ongoing municipality costs for
maintenance and flushing due
NIA
to low-flow/low-us _ e
Total Costs
_.(,Duke and Non -Duke)
Total estimated cost for all
eligible neighbors over 10
$264.000 - $660,000 i
ears
Total estimated cost for each
eligible neighbors over 10
$12;000 - $30,000
ears
f
'V EN'ERRGY.

Permanent Water Supply Proposal to DEQ - Riverbend
Riverbend Steam Station
Gaston County
0 eligible households
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309.211(c1) of House Bill
630. Households were designated as "eligible" if any portion of a parcel of land crossed the 1/2
mile compliance buffer described in HB630 and if the household currently utilized well water or
bottled water (under Duke Energy's bottled water program) as the drinking water source.
Undeveloped parcels were identified but were not considered "eligible" because groundwater
wells are not currently utilized as a drinking source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and a preliminary
engineering evaluation, cost estimate and schedule. Dewberry's evaluation did not discover
any homes within a Y2 mile of the compliance boundary currently utilizing groundwater as the
drinking water source.
ENERGY. R Y.

Permanent Water Supply Proposal to AEQ - Rogers
Rogers Energy Complex (Cliffside Steam Station)
Rutherford and Cleveland Counties
66 eligible households
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309.211(cl) of House Bill
630. Households were designated as "eligible" if any portion of a parcel of land crossed the 1/
mile compliance buffer described in HB630 and if the household currently utilized well water as
the drinking water source. Although H8630 indicates that households are to be covered, Duke
Energy has included one (1) campground/travel trailer park within the eligible listing.
Undeveloped parcels were identified but were not considered "eligible" because wells are not
currently utilized as a drinking source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and preliminary
engineering evaluation, cost estimate and schedule. Dewberry's report, for the most part,
assumes one metered connection per parcel; therefore, multiple homes may be serviced by one
connection. The total count in this proposed plan includes all final connections.
Based on the results of the Dewberry evaluation and the factors below, Duke Energy proposes
that 64 eligible well owners near Rogers Energy Complex (Cliffside) be offered the option of a
connection to a public water supply or the installation of a water treatment system, and two (2)
eligible households located on Dysart Road (identified as households 96 and 101 in the
Dewberry evaluation) be offered a water treatment system.
Grassy Pond Water Company (GPWC) has existing lines that serve the Rogers Energy
Complex, as well as customers west, south and east of the plant. To the west, lines run along
US-221 Alt and Old US-221A. Lines run along McCraw Road south and east of the plant.
Several of the eligible households can be served via existing lines that are on or across the road
from their properties. Where line extensions are required west of the plant, the closest
household is approximately 4,700 feet (0,89 miles) from the current line and the furthest
household is approximately 5,000 feet (0,95 miles). Where line extensions are required east of
the plant, the closest household is approximately 2,400 feet (0.45 miles) from the current line
and the furthest household is approximately 9,700 feet (1.84 miles).
A water treatment system is being recommended for the two households located to the west of
the plant along Dysart Road. While GPWC did not indicate any issues related to water quality
with running a municipal line to these two households, the cost to run the line just to these two
households is estimated at $487,000, or $243,500 each. The cost estimate indicates that
running the line to these two households is cost prohibitive. Total costs shown in the table
below exclude costs associated with running a public water supply line to the two households on
Dysart Road; therefore, the costs below are different than the costs included in Appendix D of
the Dewberry evaluation.
�>DUKE
ENERGY.

Permalrent Water Supply Proposal to DEQ - Rogers
Estimates prepared by Dewberry, in conjunction with design information provided by the local
water municipality, have revealed the cost to provide municipal water to the remaining 64
households is $2,5 million, or $39,000 for each household. While this cost estimate is greater
than the $35,000 for each household threshold agreed upon between Duke Energy and
NCDEQ, Duke is recommending offering public water to these households and, after well
owners have the opportunity to choose their preferred method of permanent water, re-evaluate
the overall cost and water quality of the system. If the number of households who choose
municipal water results in an overall cost that would be considered cost prohibitive or if
concerns arise from GPWC over water quality, Duke Energy will submit a revised plan to
NCDEQ and may recommend that all eligible household be offered installation and maintenance
of a water treatment system.
From initial discussions with GPWC and an evaluation of the system by Dewberry, additional
flushing of the line may be required to maintain water quality due to lower rural residential
demands and increased water travel time. The amount of flushing required, and whether water
quality would be maintained on a line with minimal connections, will continue to be evaluated
with GPWC as Duke Energy receives feedback from well owners on their preferred method of
permanent replacement water supply.
The performance standard for the public water system is the Federal MCLs. The performance
standard for the water treatment systems is also the Federal MCLs except for those constituents
identified in 2015 as having potential health concerns: arsenic, hexavalent chromium, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
standard will be either one-half of the MCL or the appropriate state standard, whichever is more
protective.
Duke Energy is currently evaluating an ion filtration treatment system; this system has been
successfully installed in other parts of the state, and initial results show it performs well in
reducing vanadium and hexavalent chromium, among other constituents. The costs shown
below are for a conceptual ion filtration treatment system. The final water treatment system will
be based upon the results of field studies.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of additional households will be identified during the initial outreach effort
conducted upon approved of this plan by NCDEQ. If the final number of households, or the final
number of households opting for municipal water supply, results in a conclusion different than
those stated in this preliminary plan, Duke Energy will revise the plan and submit the pertinent
information to NCDEQ for evaluation and approval. Also, the estimate assumes one public
water connection (i.e. meter box) per parcel; for parcels containing two households, the number
of connections will be determined based upon negotiations between the well owner(s) and the
municipality. Well owners will be responsible for making the decision for their parcels. Only
households within the'% mile boundary and served by well water at the time of the submittal of
this plan will be eligible for a permanent water supply as part of HB630.
e' ENERGY.

Permanent Water Supply Proposal to DEQ - Rogers
The Dewberry evaluation includes a project schedule based on Dewberry's past experience
installing public water systems. This preliminary schedule indicates that a permanent water
supply will be available in August 2018, which meets the October 15, 2018 deadline in H6630.
Upon submittal of this plan to NCDEQ, Duke Energy will begin negotiations with the local
municipality and a more detailed schedule will be developed. If the municipality's schedule
results in an implementation date extending beyond October 15, 2018, Duke Energy will request
an extension and look at whether other contingency measures need to be implemented.
Public Water Supply
Ion Filtration Water
Connection
Treatment System
Total Number Recommended
64
2
Water Quality Criteria
Meets applicable water quality
standards Federal MCLs
Yes
Yes
Completion Schedule
Estimated completion date
08/2018
081201V
Request extension to 1012019
Contingency factors
and/or install water treatment
N/A
stem until line is complete
O erational Considerations
Required acceptance level to
N/A but GPWC will continue to
achieve consistent water quality and
N/A
suppV
evaluate
Required acceptance level to
achieve targeted cost per eligible
1 100% (64 households)
N/A
household <$35k/household
Location of households relative to
0.45 —1.84 miles
N/A
existingmunicipal water lines
Other considerations
Costs
_
_ Total Installation Costs
$2510000
$14,0D0-$20000
Approximate cost per eligible
$39,000
$7,000 - $10,000
household
Annual Maintenance Costs
N/A
$1t.__...000-$4.000
Maintenance cost per household
N/A
_
$500 - $2.000
annual
Non -Duke Costs
Total estimated water bills monthly
$1,920
N/A
Estimated water bills monthly per
household
$34 N/A
Ongoing municipality costs for
maintenance and flushing due to
TBD
N/A
low-flow/low-usage
Total Costs
Duke and Non -Duke
Total estimated cost for all eligible
ne' hbors over 10 ears
$2,740,400
$24,000 - $60,000
Total estimated cost for each eligible
neighbors over 10 years
$42,800
$12,000 - $30,000
`�� ENERGY.

Permanent Water Supply Proposal to DEQ - Roxboro
Roxboro Steam Station
Person County
91 eligible households
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309.211(cl) of House Bill
630. Households were designated as "eligible" if any portion of a parcel of land crossed the Yz
mile compliance buffer described in HB630 and if the household currently utilized well water or
bottled water (under Duke Energy's bottled water program) as the drinking water source.
Although HB630 indicates that households are to be covered, Duke Energy has included one
(1) school and one (1) business as eligible locations. Undeveloped parcels were identified but
were not considered "eligible" because groundwater wells are not currently utilized as a drinking
source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and a preliminary
engineering evaluation, cost estimate and schedule. Dewberry's report, for the most part,
assumes one metered connection per parcel; therefore, multiple homes may be serviced by one
connection. The total count in this proposed plan includes all final connections.
During their evaluation, Dewberry recommended that seven (7) of the eligible households be
excluded from the municipal water line evaluation. In order to connect those households, the
public water supply line would require crossing the plant intake canal and a railroad, both of
which would be technically complicated, time consuming and costly. These seven homes were
excluded from the Dewberry cost estimate.
The closest existing City of Roxboro municipal line is located near the intersection of Chub Lake
Road and Country Club Lane. The closest household is located on Concord Ceffo Road and is
approximately 19,160 feet (3.6 miles) from the current line. The furthest household along the
southern route is located on Semora Road and is approximately 33,000 feet (6.3 miles) from the
current line. The furthest household along the northern route is located on McGhees Mill Road
and is approximately 29,000 feet (5.5 miles) from the current line. Since system pressure may
be of concern during fire flow, Dewberry included an elevated storage tank in the cost estimate.
Although automatic flushing hydrants are planned along the route to assist in maintaining water
quality and water disinfection, the City of Roxboro indicated that they had water quality concerns
related to residual disinfection concentration and disinfection by-product formation.
The estimated cost to provide a municipal line to the 84 households is $10,980,000 or $131,000
per household. The Dewberry evaluation includes a project schedule based on their past
experience installing public water systems. The preliminary project schedule indicates that a
public water supply could be available through the City of Roxboro by September 2019, which
does not meet the October 2018 deadline.
(� DUKE
ENERGY.

Permanent Water Supply Proposal to DEQ - Roxboro
Due to the excessively long pipeline required for the City of Roxboro to serve the eligible
households, Dewberry also evaluated the installation of a new community well system outside
the ''/z mile compliance boundary. The preliminary design, based upon hydrogeologic
information provided by SynTerra, assumes that four wells at 250 feet deep would be able to
service the eligible households. If this option were to be chosen, a private well supplier would
need to be identified and a test well would be installed to confirm water quality and well
capacity.
The estimated cost to provide a community well system and lines to the 84 households is
$5,140,000 or $61,000 per household. The Dewberry evaluation includes a project schedule
based on their past experience installing community well systems. The preliminary project
schedule indicates that a community wail system could be available by August 2018, which
meets the October 2018 deadline.
Based on the results of the Dewberry evaluation of both the municipal water line and the
community well system, the concerns over water line pressure and the additional disinfection
needed, the uncertainty over groundwater quality and well capacity, and the overall construction
costs, Duke Energy proposes that all 91 households be offered a water treatment system.
The performance standard for the public water system is the Federal MCLs. The performance
standard for the water treatment system is also the Federal MCLs except for those constituents
identified in 2015 as having potential health concerns: arsenic, hexavalent chromium, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
standard will be either one-half of the MCL or the appropriate state standard, whichever is more
protective.
Duke Energy is currently evaluating an ion filtration treatment system; this system has been
successfully installed in other parts of the state, and initial results show it performs well in
reducing vanadium and hexavalent chromium, among other constituents. The costs shown
below are for a conceptual ion filtration treatment system. The final water treatment system will
be based upon the results of field studies.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of additional households will be identified during the initial outreach effort
conducted upon approval of this plan by NCDEQ. If the final number of households results in a
conclusion different than those stated in this preliminary plan, Duke Energy will revise and
submit the new plan to NCDEQ for evaluation and approval. Well owners will be responsible for
making the decision for their parcels. Only households within the •/= mile boundary and served
by well water at the time of the submittal of this plan will be eligible for a permanent water
supply as part of HB630.
(.� DUKE
ENERGY.

Permanent Water Supply Proposal to DEQ - Roxboro
Ion Filtration Water
Treatment System
Total Number Recommended
91
Water Quality Criteria
Meets applicable water quality
_
Yes
standards Federal MCLs
Completion Schedule
Estimated coMplation date
1212017
Contingency factors
WA
Operational Considerations
Required acceptance level to
achieve consistent water
NIA
quality and sWply
Required acceptance level to
achieve targeted cost per
N/A
eligible household
<$35k/househol
Location of households
relative to existing municipal
N/A
water lines
Other considerations
Costs
Total Installation Costs
$637 000 - $910 000
Approximate cost per eligible
$7 000 - $10,000
household
Annual Maintenance Costs
$45 500-$182,000
Maintenance cost per
$500 - $2,000
household annually
Non -Duke Costs
Total estimated water bills
_
NIA
monthly,
Estimated water bills monthly
_
per household
WA
Ongoing municipality costs for
maintenance and Flushing due
NIA
to low-flow/tow-usage
Total Costs
Duke and Non -Duke
Total estimated cost for all
eligible neighbors over 10
$1,092,000 - $2,730,000
ears
Total estimated cost for each
eligible neighbors over 10
$12,000 - $30,000
ears
f ,DUKE
e ENERGY.

Permanent Rater Supply Proposal to DEQ - Weatherspoon
Weatherspoon Steam Station
Robeson Counties
14 eligible households
Duke Energy has evaluated the feasibility and costs of providing a permanent replacement
water supply to eligible households, as required under G.S. 130A-309.21 1 (cl) of House Bill
630. Households were designated as "eligible" if any portion of a parcel of land crossed the''/z
mile compliance buffer described in HB630 and if the household currently utilized well water as
the drinking water source. Although H6630 indicates that households are to be covered, Duke
Energy has included one (1) business within the eligible listing. Undeveloped parcels were
identified but were not considered "eligible" because wells are not currently utilized as a drinking
source.
Dewberry, a respected outside vendor, conducted the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and preliminary
engineering evaluation, cost estimate and schedule. Dewberry's report, for the most part,
assumes one metered connection per parcel; therefore, multiple homes may be serviced by one
connection. The total count in this proposed plan includes all final connections.
Based on the results of the Dewberry evaluation and the factors below, Duke Energy proposes
that seven (7) eligible well owners near Weatherspoon be offered the option of a connection to a
public water supply or the installation of a water treatment system, and seven (7) households
located on Taylor Drive (identified as parcels 23, 37, 54, 61, 93, and 96 in the Dewberry
evaluation) be offered a water treatment system.
The City of Lumberton has an existing service line along NC 72 Hwy (S. Roberts Ave), where
parcels 15 and 60 are located. Robeson County has existing service lines along Old Whiteville
Road and Beulah Church Road. All of the households recommended for connection to a public
water supply are located along a current water main and therefore only service connections are
required. Service lines connections range from approximately 225 feet along NC 72 Hwy to
approximately 1,200 feet for the household on Havahiah Drive (off of Beulah Church Road).
A water treatment system is being recommended for the seven households located off of Taylor
Drive. While Robeson County did not indicate any issues related to water quality with running a
municipal line to these households, the cost to run the line just to these households is estimated
at $553,000, or $79,500 each. The elevated costs are due to the new water main required for
these households. The cost estimate indicates that running the line to these households is cost
prohibitive. Total costs shown in the table below exclude costs associated with running a public
water supply line to the households off of Taylor Drive; therefore, the costs below are different
than the costs included in Appendix D of the Dewberry evaluation.
Estimates prepared by Dewberry, in conjunction with design information provided by the local
water municipality, have revealed the cost to provide municipal water to the remaining seven (7)
households is approximately $277,000, or $39,600 for each household. While this cost estimate
is greater than the $35,000 for each household threshold agreed upon between Duke Energy
DUKE
Ve ENERGY.

Permanent Water Supply Proposal to AEQ - Wearherspoon
and NCDEQ, Duke is recommending offering public water to these households and, after well
owners have the opportunity to choose their preferred method of permanent water, re-evaluate
the overall cost and water quality of the system. If the number of households who choose
municipal water results in an overall cost that would be considered cost prohibitive or if
concerns arise from the City of Lumberton or Robeson County over water quality, Duke Energy
will submit a revised plan to NCDEQ and may recommend that all eligible household be offered
installation and maintenance of a water treatment system.
From initial discussions with the City of Lumberton and Robeson County, and an evaluation of
the system by Dewberry, flow and water pressure are adequate to service the households
recommended for connection to the systems.
The performance standard for the public water system is the Federal MCLs. The performance
standard for the water treatment systems is also the Federal MCLs except for those constituents
identified in 2015 as having potential health concerns: arsenic, hexavalent chromium, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
standard will be either one-half of the MCL or the appropriate state standard, whichever is more
protective.
Duke Energy is currently evaluating an ion filtration treatment system; this system has been
successfully installed in other parts of the state, and initial results show it performs well in
reducing vanadium and hexavalent chromium, among other constituents. The costs shown
below are for a conceptual ion filtration treatment system. The final water treatment system will
be based upon the results of field studies.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of additional households will be identified during the initial outreach effort
conducted upon approved of this plan by NCDEQ. If the final number of households, or the final
number of households opting for municipal water supply, results in a conclusion different than
those stated in this preliminary plan, Duke Energy will revise the plan and submit the pertinent
information to NCDEQ for evaluation and approval. Also, the estimate assumes one public
water connection (i.e. meter box) per parcel; for parcels containing two households, the number
of connections will be determined based upon negotiations between the well owner($) and the
municipality. Well owners will be responsible for making the decision for their parcels. Only
households within the mile boundary and served by well water at the time of the submittal of
this plan will be eligible for a permanent water supply as part of HB630.
The Dewberry evaluation includes a project schedule based on Dewberry's past experience
installing public water systems. This preliminary schedule indicates that a permanent water
supply will be available in May 2018, which meets the October 15, 2018 deadline in HB630. If
NCDEQ agrees with Duke recommendation to provide the option of public water connections to
those households where only a service line is required, the schedule may be accelerated.
Upon submittal of this plan to NCDEQ, Duke Energy will begin negotiations with the local
municipality and a more detailed schedule will be developed. If the municipality's schedule
results in an implementation date extending beyond October 15, 2018, Duke Energy will request
an extension and look at whether other contingency measures need to be implemented.
-t� DUKE
ENERGY.

Permanent Water Supply Proposal to DEQ - Weatherspoon
Public Water Supply
Ion Filtration Water
Connection
Treatment System
Total Number Recommended
7
7
Water Quakilly Criteria
Meets applicable water quality
standards Federal MCLs
Yes
Yes
Completion Schedule
T
Estimated letion date
05/2098
1212017
Request extension to 1012019
Contingency factors
and/or install water treatment
N/A
stem until line is complete
erational Considerations
Required acceptance level to
achieve consistent water quality and
N/A
N/A
supply
Required acceptance level to
achieve targeted cost per eligible
100% (7 households)
N/A
household <$35k/household
Location of households relative to
225 feet to 1,200 feet
N/A
existing municipal water lines
Other considerations
Costs
Total Installation Costs
$277,000
$49 o0D-$70-000
Approximate cost per eligible
household
$39,600
$7,000 - $10,000
Annual Maintenance Costs
N/A
$3.500-$14-000
Maintenance cost per household
annual
N/A
$500 - $2,000
Non -Duke Costs
_
Total estimated water bills month
$286
NIA
Estimated water bills monthly per
City of -Lumberton $48
household
Robeson C $38
N/A
Ongoing municipality costs for
maintenance and flushing due to
TBD
N/A
iow-flow/low-us As
Total Costs
--
Duke and Non -Duke
Total estimated cost for all eligible
neighbors over 10 ears
$311,320 $84,000 - $210,000
Total estimated cost for each eligible
neighbors 10years
$44 470 $12,000-$30,000
— over
KE
ENERGY. NERGY.