Duke Energy 12-13-2016 HB630 Plans for Asheville and Sutton_20161207

VoU� ENERGY.
Marry R. al'ueris
sd9io: V60-17FO. RSMt
Environmental, Mealu, a Safely
526 South Church Street
Mail Cme EC3AF
ChOutte, RC 28202
! VY-JOZ-YJV-Q
Decumbxur 13, 2016
ur. uonala R. van der Vaart
North Carolina Department of Environmental Quality
1601 Mail Service Center
Raleigh, North Carolina 27699-1601
Subjt=ct: Submittal of OUR87s H5630 Proposed Plans for Asheville and Sutton
Dear Secretary van der Vaart:
Hoaze Bill 630 requiras Duke Energy to submit by December 15, 2016 plans for the provisiorl
of permanent water to eligible hoasehvlds louatea witpin one -Mali mile of the ash basin
compliance boundariva. Today, me'ru submitting the final tw-v proposed permanent water
supply plans: Ashevilla and Sutton. Thase plans follow the protocol approved by the
department on September ee ana outlined in the letter accompanying our pre�lous plan
submittal.
Connection to a public water supply is mcummundud for the houaehulds aurmanding
Asheville. The eligible locations around Salton a,e bas;nasses or industrial facilities. Due to
fire protection requirements by the local municipality for industrial locations, it is cost
prohibitive to uxtund mumli .;pal service to these locations. Duke's rGcc,,,mendation is that the
eligible locations arand Sutton are offered water treatment systems to meet their potable
water neeas.
I look forward to receiving the agency-s reeabacR on our proposed plans.
If you have commG„ts and/or questions_ please direct. there to me at faZF-3Sc-ZF3'u3.
Sincerely,
Harry K. Sideris
Senior Vi=-President
Environ,nental_ Health & Safety
Encicsarc: Permanent Water Supply Prupasals to DEQ and associated Dewberry Ellase II
Potable vvater Programmatic Evaluation for AahuJile and Sutton
nc: Turn Reader; Asst. Secretary for the Environment

j---anent Water Supply Proposal to DEQ - Asheville
Asheville Steam Station
Buncombe Cuarrty
40 eligible households
Duke Enargy has evaluated the feasibility and cons of provising a permanent replace„ —,tint
..at�r supply to eligible households, as required under G.S. 130A-30a.z i i �c i) or House Bill
630. Households ..ere designated as "eligible" if any portio, , of a parcel of land urossea the
mile compliance buffer dear. ibed in HB630 and if the hoasehald currently utilized well water or
botuen water tunaer,juRe Energy's bottled ..atur prowrav") as the drinking water source.
Although HB630 indicates mat nousenolds are to be covered, Duke Energy has included one
(1) suhual/uharch as an eligible location. Oneevelopet7 parcels were identified but were not
considered "eligible" bauaa5e groundwater wells are not currently utilizes as a drinking source.
Dewberry, a respected outside vennor. conauctea the Potable Water Programmatic Evaluation
(attached); the evaluation consisted of a survey of eligible households and a praliminary
engineering evalaatim i, oust estimate and schedule. Dewberry's report, for the most part,
aasumea one metered cunnectiur per parcel; therefor, maltiple homes may be services oy one
connection. The total count in this prupu3ed plan incladas all thal connections.
Based on the r aaulta of the Dewberry evaluation and the factors below, VuRe Energy proposes
that all 40 eligible households near Asheville be offered the option of a connection to a public
water supply or the installation of a ..atur treatment system.
The City of Ashevillw already has maniLipal lines located on the streets where eligible
households are located; therefore the households +would require only service lines, ranging from
approximately 50 meet on Ducker Road tc rppruwimately 800 feet on New Rockwood Road.
Since only service lines are requires, no minimum number is needed for the installations to
remain cost-effective.
From initial aiscassions witn the City of Asheville and evaluation of the system by Dewbarry, the
current system has adequate water capacity and pressure, and the ..ater quality could be
maintained with the addition of the eligible llouseholas.
The performance stantlara for the public water system is the Federal MCLa. The parformance
standard for the water treatment system is also the Federal MCLa wXcept for thuaa constituents
identified in 2015 as having puteiuial health concerns: arsenic, tlexavalent chrumi-uan, cobalt,
iron, lead, manganese, sulfate and vanadium. For these constituents, the performance
atandard ..ill be either tine -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
accuea3fully installed in other parts of the state, and initial rsalts show it peRorms well in
reducing vanadium and hexavalent chromium, among other constituents. The final water
treatment system will be baaad upon the resalta of field stadies.
I. DUKE
I.
ENERGY.

f-ermanent Water Supply Proposal ro DEQ—Asheville
Dane Energy has mane efforts to identity all uliuiblu households, but it is anticipated that a
nominal number of atlaitional households will be identified during the initial untroach effurt
conducted upon approval of this plan By imCDEQ. If the Tmal number of householda, or the final
number of households opting for public water supply. results in a conclusion different than thuaa
stated in this preliminary plan, Duke Energy will revise and submit the new plan to MCDEQ for
evaluation and approval. Alou, the estimate assumes one public water connection ji.e. meter
uox) per parcel; for paruula uunteining twu homseholds, the number of connections will be
determines Gasetl upon negotiations betwzun the ~wall owners) and the municipality. Well
owners will be responsiGle Tor making the decision for their paruOla. Only households within the
'/_ mile boundary and served by well water at the time of the submittal of thin plan ..ill be wlig;bla
fur a permanent water supply as part of 1-16630.
The Dewberry evaluation incloaes a project schedule Based on their pant o.purienca installing
public water systems. The preliminary project schedule indicates that a permanent wwatar supply
will be available by September 2017. Upon submittal of this plan to MCDEQ, Dane Energy will
begin nagatiatiana ~with the local municipality and a more detailed schedule will be sevelopea.
i he schedule will alas, dupe,--.d on the time ,uquired to aducate the eligible households on their
choices. ,T the installation schedule ahuwwa an implementation data extending beyo, id October
15, 20 its, DoRe Energy will request an extension and Icuk at ~whether uther Conti, igancy
measores need to be implemented.
T. DUKE
ENERGY.

r..—tanent Water Supply Proposal to DEQ—Asheville
Public Water Supply
Connection
Total Number Recommended
40
Water Quality Criteria
Meets applicable water quality
standards Federal MCLs
Yes
Completion Schedule
I•sdm_atela completion aaie
i
09/2017
Request extension to 10/2019
Contingency [actors
.nalor install water treatment
s siem until line is complete
�► eratlonal Consitleradons
Requires acceptance level to
achieve consistent water quaky ano
NIA
supply
Requiren acceptance level to
achieve targeted cost per eligible
IVA
household <$35k/househola)
Location of Rousenolns relative to
existingmunicipal water lines
at7 n _ SO'u n,
Other consilaeratiions
Costs
Total Installation Costs
$330;urju
approximate cost per eligible
$9;800
household
annual maintenance Costs
N/A
Maintenanow ast per household
NIA
annually
Aon-Duna Costs
Total estimated water bills monthly
$1,320
Estimated water bills monthly per
$3a
household
Ongoing municipality costs for
maintenance and flushing due to
NIA
_ low-iicrzilow-usage_
Total Costs
DaRe and Non -Duke
Total estimated cost for all eligible
neighbors over 10 years
$54e zF00
Total estimated cost for each eligible
-neighbors over 10 years
$134r iu
T DUKE
1 ENERGY.

DCWbur=y.
Asheville Steam Station
Phase 11 Potable Water
Programmatic Evaluation
Duke Energy
Gecemuer r , A M
.J',IIIiII..
SUBMITTED BY
Dewberry
2610 Wycliff RMM
Suite 410
Raleigh, NC 27607
509NII I I ro I G
Duke Energy

i aBle of [contents
E;;ve;-.ti:o sam.m...r...............................................................................................2
9. Intr-cluction and Project Approach..............................................................w
2. Phase li Basis of Design................................................................................6
2.1 rMauie water Connection iv►apping.............................................................5
2.2 MURlelp..l YetoDle W..[o.' Cv.-.11ee[wn �r��:v,-, of rrenubla Co�L................6
J. bite A..al,..i_....................................................................................................7
3.: Station Martins and Household Da.a....... ................................................... ./
3.2 Field ObsernM.ions..........................................................................................7
3.3'vtherConsideraLions .....................................................................................a
w. Regulatory Permltting...................................................................................2
5. 5cnevule........................................................................................................ 10
G. Opinion of Pro6o61a Cvwt............................................................................11
mppen'ulx r,: ^sMevllle station Pllase II Mapping
mppenfllx n:,wsnevlile station Rousellola Data 5pNaftnaat
Appendix C: seilvaele
Appa..dl- D: Dpinion Qf Probable Cost
Dewberry Duke Enargy xsilevliie Steam 5tation Pease 11 Potable Water Ro-ammm..ti. E:alaation 1

Executive Summary
This Phase tt evaluation is structufM to comply t�7tn the requirements or lvor[n Ha=_ u'.n SJo:
Section 130A-309.211.(el) nt Hoe —bill 53e .cye:. p.�;;'�:oa. of purmunent ,rater supply for each household that has a
drinking ►%ater supply well locateg %simin a 1/2 mite radius From the est_ot:.,nca cv-p1....cc no�.d�,, at a co..1 ca.T.b.wt:on
.w:dwWh in. paund...eut, and is not separated from the imps undment by the mainsiem of a river, or oiner ooRy or hater inat
routs prevent o[ eonLu-i.-.u.-.ts tn,a-;,rn b.attnd—tcr trum the impt,undmen: to a Well.
To ..dd.— the pro: isions of House Bill 630, Dewberry performed this rhase is preliminary engineering e-mivadon to suppt,
potaole ►-ate.- to 21c.-As at Inc cv...yl:u.;c.. bounda,—y. Preparation of This report is intended to comply with
the mouse Dill oso requirement to maze a report submittal to the lvonn UcpurFr-ent or p a.�i. �n...c..t..l Qeality (DEQ)
by Uecc.T.ber lg, 2o16.
On September 14, 2016 a project review meeting was nettl at inc t:ty at Asne nc urncm Kepa �aC:.tat:: es from Duke Ene,w,
lic,rber.-y, and City of Ashe%ille attended the meetins.
„etailed rhase tt mapping was tleveiopell using nuncoMDv Coe.ty Yrvr„rty ..Y, tn..t ,no:: c..cfi naescnald in the V2 mile
compliance buffer. Dewberry visually observed the households shown on the rrlase it mapping on 5eptemocr 14, 2015.
nuke nnergy anu the City or nsnevine are vromins toscMr-. to eoa.nr- Env : utcr 01.,triDuCo . 3-ystcm location and the number
of households within the compliance buffer not currently being servetl ►vitn City wafer. nasetl on tlirectie : Kam ly-_Ro 11. e.r,y,
wZ;t'rr, trout the household locations that are receivins City water within the compliance
busier. roientim moaincations to the projeetgd w-et:..s uu a .b tnc ;.colt pn.,se of .;vrtt may impact cost, schedule,
and permitting reyuirement:.3.
n nousenott[ tlatauase was uevetopctr 5-*::s 1se.eeRtne Coa.ty EL; reevfa. t;cd to tn. G1S shape file which identifies the
propcnp owner and the address for each household i%imin the 1!2 mite compliance ouner.
rt scneaute was preparea in p-n to ono aleatone data i-JIM to comply Atn House Bill 630 which states the follo%s ins:
Rept,n submittal to the t-4or[h Carolina untl no pater utan t,ecemoer 15, 2015.
• 1)hQ .znd...- a anal decision to approve or disapprove the report no later than aanuary ib, 2011.
rermanent repi«ce-cRt 7;..tt;7. .�ppl.ca a- prw�44M ..o l..tc. than October 13, 2018.
1t cacn at the .-.ilestone dates are met, the schedule indicates that project completion can occur in sepiemoer of 2017 vrnicn
meets the nousc nal 530 ..rne3zle .�.ye:re... c.-.[ Ian pc......zunt acplacement .rater supplies.
Dewberry' Duke Energy I Asheville steam atatlon Phase 11 Potarlle water Programmatic E:Rla..tion z

An opinion or pronaoie cost pas N ci� ,M to Y.FOc petabio : tit-.- r oc to noz.cnoid, .rithin the ih mile compliance
buffer. The zio households are served from 3zi water tine service connections trom an --ten in.. me pt'.-utc8 Zsis
Potable Water Service 40 Households $390,000
Po[atee vvater 59Mce per n.,=M tl 1 $9,800
7"11c pot..bie ,rater connection cos, esLimaLe includes a io% conLingenq which is deemed consistent Mite a project limited to
eater service tine ev :: cc Mn-
't'ltw report provides additional de►ail on :he Project Apyroach, oasis of Lesign, and site nnmysis. Asne-Hite steam station
mapping is proaM :.. Arre .tlin A. t Ile noe3cnoie d..tau...e :. ,rtv,-.de� :.-. Appendix B. The Asheville Seam SLaLion Potable
water schedule is provitleti in nppentlix C, antl Me Opinion of rrooaDie t a -I
Dewberry auKe Energy AsRevl,le steam 3tatlon PRase ll Potable vvater Pre=re-rnPtie E:wia..tien 3

1 . Introduction and Project Appruauh
PROJELT INTRODUCTION
Durins the Phase I programmatic powble ttIdterevaluation deshiop siudy, concept ievei mappi.s d�;eivrei3 �ne:ra.g tnc
Asnc zuc bte-7.. stat:v.a location, the potential notable Crater tie-in location, and pt,tendal pipe routing to residents tiviinin a vz
mite of ute compliance ooundary. we =0 [no rn..ac 1 ..rri•=s to a co.iccpt Ic: cl cost estimate with a rfo%
contingency. Durins this Phase II evaluation the cost estimate includes a io�c contingency wnien is
reo cet li.:.:tea to ::..tca art -.cc l:,.c connections.
This Phase II evaluation is structured to comply with the requirements of ivortn Carolina house li:fi 8go: 5co6e773oA-
30y.Ph7.(c.), ..11,cn .�-yu;.e� pro; ision of permanent water supply for each household That has a drinking water suppiy wen
iocatetl witnin a vz mile rauius [rote [fie colaoc.,nd8 co77-.rl2..ncc ooura...-y at. coal combustion residuals impoundment, and is
not separated from the impoundment by the mainstem of a river, or otner ntldy or hater [n..t -.vela nee: cat tfic .:.:gntt:o.-. of
co..t- -2.7. ,.ts tliawnsfi ground.:ater from the impoundment to a well.
To address the provisions of house pill'v3o relhrencetl aaove Vewoerry nas periermW 4 rn-m i �ervcn:es ic:ci t ...mat2.on and
tn.. Yn..sc 11 prcl-'m..;naty engineering evaluation of.he technical and economic feasibility to supply munic[pai potaole water to
residents i-itnin a 1/2 mae -d:=:; at the eveirl,..aec hound..y. "rfic Ph-11 evaluation results «ill be used io prepare the
submittal to the iQotth Mrolina uepartmem of zn ironmental Quality (tr1rQ) oT Llacclene.- 15, 2e75 ..3 x-,-qm ,-,a tty Moue B"ll
63v.
Using publicly available information i,ewoerry evaivatea [ne tonowing eriteri- to rel%r the rfir..,c 11 Asttc.'alc Ste...., Station
ca.g'neeringstudy:
■ raocume..[cd ..rrry ,: -..te lvcaroa of U.b. -.tc7., hiclud" s possible wetlands shown in the U.S. Fish & ry ildlife aervice
national vvetlands inventory Zas applicame)
identified pt,tential;urisdictional and permitting authorities to establish permitting needs
I.sC: sated o.-...rc..3 (cat,...ated square footage and number of parcels affected)
• ,_timated the pipeline ieng[n anti pipe aiameter(s) ter is d =de..l z--rl iec fi ae
Evaluated the potential need for a stater boosier pump staiion or elevatetl tans: to sustain adequate hater
tnc r.,[c.-.t.wi .ices tot oz;j j lc.T.cr.ta1 disinfection
• ,;valuated the potentiai need/requirement for fire nA-.ts..azl ny$rrit.,e....tsty
• Evaluated potential construction methods and challenges
Dewberry OuKe Energy PmMevllle Steam Station Phase 11 Potable vVRter Pronremm-tiv E ale..t6n 4

PROJECT APPROACH
Dewberry contacted the Luke znergy t..ucat uovernment anti Community Keiztto..z; uwt.ict MaT....Srr to ai—z;— the
t.-.tarml�tton .,ce�ca to execute the Phase II evaluations, and do arrange for a subsequent meeting tvltn the local eater puny.., or,
the City of nsneAue.
U.N. Scptc.—.bc714, zoos a project review meeting was held at the City ofrtshev ille offices to tliscuss execution of this rn..... ii
preliminary evaivado : aa1 ,gib e'y�t ..t p.oi'cct =crution. Kep..rntati:es from Duke Energy, Dewberry, and the City of
Asheville attended the meeting. i lle primary purpose or the meeting t »s to conn.... Inc system tie-in
I—t1wi, ay.tz. pressure, pipe size, and water quality at the tie-in location, capacity limitations, anti wnetRer tne.-c «.c tutu
piannea water s�tc- rm;ccis tn..t tnc rna,e it c4aluation. Dewberry also inquired as to whether any househoius
1Athin a 1/2 mile of the compliance oountlarywere presently oein6..c :ctl o, �,.tetr..t rat-blv Watc.. rbllo,ring the meeting,
Ucrbc..y performed a drive -by observation of the area ¢o be served.
During chase i Lewberry outainetl municipality mapping of tnc potable .-,tor i3�t: bettor, �y�te .....,a then developed draft
—...per �no;rng the Asheville Steam Station, the respective potable water disiriuution system tie-in location, a!ti Inc ..tc. itec
pipe routing. we e..M the ueKc r -c.—g, li,i,ahi..b w..tcr Keccptor Surveys for Coal-fired Power Stations developed in 2014 to
show compliance bountlaries antl the water supply liens v-itn:n a 1/2 atlo of tile ca rlta.,ce board.,.—y. The maps were
p.zp....-d using GIS as the native software.
during rhase tt we tlevetopeQ more tletahed mapping oa..t_M an tse..commbc Cau.-,ty ra vperty niups to identify property owners
....a household addresses within the 1/2 mile compliance buffer, ror the ruase it analysis property parcei.. tn..t rare ::Roll, ar
parts, =tRi: tnc ca apli� aec bumli ..c.e inctudea in the evaluation.
Duke Energy and the City of Asheville are working together to confirm file wafer tlistrioution systc- iaeetian :.e Inc .umlbr:
et eau eno[a. :=tnt a tnc rv.urG..n. o butte, not currently being served %%ith City water. eased on direction from uuxe energy,
uewberry projecteQ water main routing [ Inc noe..cnAl lacetta,.., th..t uiz rcrei,.-.g City hater «ithin the compliance
buffer. Poten,.ial modifications to the projected water main routing during the am pnase of :'e.x auT : r..ct tout, ,cncaetc,
....8
Using the Phase II mapping a database of property owners anti Rouselloitl iocadons : _ tic-ciot.M. i.rc: �be.-.r, ,.i_ �.-.tactca
tltc Ctty of AsnUV:uc to cvr n.... residents along the existing water lines vtrithin the compliance uuuer who are conneelm to Inc
system. i nis inrbrmadon auot-eti io. ttie.-.tinealto,. of .—ter,.is Who e.c located along the existing ti►a:er line but not
connected to the water system. vve also prepaM a project senetluie.
uewoerry men tlevelopea .... ort..io.. of rmbunle cost to: Inc tnatallation of piping infrastructure to the po®ble water tie-in
location. We used vendor budgetary costs for me primary capital tiuir tent ..-8 G..ce coot taoto.. w c.,tt.i.ate the installation
cats. we aid .,ot obtain contractor installation cost estimates for this evaluation. uewoerry revzevreti die cost ti..ta : tti UuKc
energy to ODtai' circa.., ,.ee v7 Inc-ctnvaology ana the allowances applied.
19 Dewberry- Dune energy Asheville Steam Station P[fase 11 Potalilo water P.o„rm m.-tic Evaleatia.. 5

1. Phase 11 Basis of Deign
The purpose of tnis section is to tlocumem oasis et ate.:g- Yt:oa., tn.,t ±:c.c a..cd to prepare the Asheville Steam Station
mapping, opinion of cos., and schedule.
z.1 POTABLE WATER CONNECTION MAPPING
KEy assumptions for the potable wafer connection mapping areas iouows:
rn:, stat:va. aota not r�qa re installation of new waterline piping as all z10 householUs can ue servell from an existin6
vvatenine.
. Private easement, «rill be required in muliipie areas.
2.2 MUNICIPAL POTABLE WATER CONNEC i ION DPINiUN ur-
PKUBABLE COST
Key assumptions for the potable water connection cost estimates are as iouows:
i Re .-Z MCI yuu.-.t-tam tar ,tc.... az a..a �3 on the cost estimate indicates there are szj potable water connections. t ne me 2
inch service taps are for service connect:e..., eeeeels8:.ag 7,000 ttct i -d/oa hishcr .rater demand connections. The 2y - -74
inch service taps are for individual household connections close to me proposed m..i -a mct�. uo,. as a ;cctAG..
• LIle at naii.,ot[via ca.imcctiv.ns shown in the cost estimate is based upon the nuncombe County property maps,
'urive-oyoosemations, anti from vi Re -es tnat ...4 ne:..bcc with City of Asheville waver.
. Items 22 through 26 are installed cost, so a go-,,u insianation cost factor was not
. ttv rs tH --usn Z. uac M. etc.:..l cost, so a ,,o% installation cost factor was applied.
- items i tnrougn 28 are summca o-a ,no �.a :.3 a bufMt'AL. Coat t.,ctors are then applied to the SUBTOTAL to estimate
the balance of the project cost.,. Yve have applietl a io7b contingency vrnicn is tiee-ca ....i..t...t -tn .. p:vjcct ii.m..:tca to
:;ufe.- mac. ,+—iGc G.ac cv.a.;cct:OnS.
Autiitionai assumption- tn..t a. M to pack—m tnc w.t estimates are provided as foot notes on the cost estimate
Table.
r..t...cnl u,_y-ia:tion includes the cost to compensate land Owners for service lines extentleii Clown private rowtl.....a/er
across private pro,.xty.
ItDewberry vuRe Energy A00vlile Steam 5tation Phaae 11 Pota6lo Watts P.ounirn tati„ E.aloation 6

I Site Analysis
3.1 51 A i ION MAPPING AND HOUSEHOLD DATA
Tnc rtta,c 11 overall mapping in Appendix A shows tha< the existing City of rtsheville potable water aistrioution system covers
me area %groin ttic vz w.r�:r,ncc bZ;ITc.-,;..a;Cal:.-.b tnuMt a .'e; pal..bic ;V-.terline extension is not required to serve households
within the compliance butter. i flirty tour ser7ce tines are proposed to ae i....t..nil trom a.. ea:mot:.g :: r.tc.1;1.c to Crrc
nou.cnoldS not currently connected to City of Asheville water, as confirmed by the City of rshev ille.
t he City of ,wheAlle v+in own anti operate the expantlM tv. tre 40 L-aa"3:or-1 nomacnolZi-
i He rn....c ti s:tc a,.....0 unccts:. AYYcna; A :o.c pre•l-1- a by o;erlay.ns Buncombe County propene mats onto the
compliance boundaries'uetaheti in the uutce energy urinhing water Keecrta. toy Ctmi-ni-dl ro:.c. station, aueiopca
.n zot ff. The Appendix A Siie map shows ;he 1/2 mile compliance buffer and rectangular sneet map sections. nteven sneers were
p.-ct... -d to ..nv:: mr. r. ;eet�i3 Q;,t:.T.s ;: ator ik..c rotttc, :nd:Mdual households, and new service line connections v+nthin the yr
mile compliance ouuer. curing the septemoer 14, 20I6 tiri:c-b„ ue 'Dc..—, er.il, ob�c : ca in the
Appendix Asheet mapping.
t he household dawoase in appendix n was created from me rizneo-De Minty ta...ccoru. t;cil to the Gis n.pc ale ;rhich
identifies the property owner and the address for each household within the 1/2 mite comptiance ouuer, inetuding pareet.. or
i—n ;-!in no rca;ac .ts (cm ty lot).'rnu p�reel data listed on the spreadsheew also includes Parcel ID, Jand use, easement
Requirement, and anticipattld water uemand rormen r-r-rty. it..noeta be zolcil tnat....e.:.bcr of pa.ecl. had more than
one home located on the property; in this case one meter was assumed v%itn tengtti of service tine assumM to extc-d to teen
no c rro. ;; z:.glc mctc.. r:..b:ncorinb;.ds...e..t ,vas utilized in cases where homes were located out of Sight from the road
anti munipte structures couid oe seen durittls...
xG7:c .7 of tnc .art.;...g tro... Appc..a:. A allowed for estimates of the required private easement areas around Ehe eshev ille
Steam 3171tion. t ne potaote water se. Acc t;.-.ce rMroae8 to 3c.-- ....,7;n3 tnc Asnc :elc Steam Station will t Equire
private easement at—yuisition in multiple areas. standard easement estimate practices were tone-:7M a-e.-.d inc Asnzr.uc
stcu. stet;o.-., :: n:cri ;.icteaca miultiply ins the length of the service line on private property by jo feet to obtain the area. t ue
area was teen munipticd o,, 5o7, of inc -. c-se t-na :-lee (rev acre) u; irl&cutUd by public tax assessment for propetzies
around :he Asheville Steam station, providing an estimate or me easement cost. temporary ease-cnt3 not :nciaaca:..
tnc c tcet..t'am
;u FIEED OBSERVATIONS
As ,too.: n :., Appendix A, installation of new M-dLerline piping is not required for this project. therefore, Mere are no road
crossings, railroad , otne. coeu:ct:..s rn,,;ati tc=tertm ..mac:ate ,Ath extension of a new waterline.
eased on our observations and the Phase II mapping, it appears that iy service line road crossings %sin ne required.
„ewberry did not observe surtaee water or apparent wetianti intrasiruct..c e,.c vai'ii.ca:.ructss. -rn;., 2.. co....istcrl ;rtr,
USGS mapping and the U.S. Fish & Wildlife Service tvationaI Yvetlands Lnventory.
Dewberry" Duke Energy Asheville steam atatlon Pnase il rotaSEe crater Programmatic Evaluation 7

During the drive -by „ewberry did not ouserve potemiat connicts .-.IM K..e.M .wts eUMcm. Ac rQ;.,g to the City of
Asneviiic, the Yo households evaluated for permanent water replacement do not presenhy nave public water se�cc. 1v�tw u1
gas main anti noer optic m.rxc .-� oD.� :tea a�.:.-.s tnt a.-:: a-ny, nut are typically located such that service lines can be
installed %Vithout a significani convict.
3.3 u i REFS CONSIDERATIONS
'rhe City of Asheville operaies a lame water system throughout nuncomue County wnere iney manage inc �;;FFiy, ....a
mete. -A D'.11 Iv" X.Iur Z;—, u :a aC.. o — [tic awr..cr of the ,rater P'Fin5 infrastructure. The City of.�,sheville's main sources of
water are from the worn rorx anti nee i ree reservoirs.
i ne City n.... comm M tnc, n..: c ..acgv.t� +'ute: cupacity and pressure to serve the resident.,, around the Asheville Steam
station. i. hereiore uasett on rnis preliminary inform..[:c.., the cay.,clty ....a k, .are- :6 aec...ua use-yuate to serve the qo
households in the 1/2 mile compliance buffer.
since there are 4o new propost?t3 service conned:e.- to ex.zrns ~..tG: system the.. is no anticip.tted impact on
disinfection residual concentration or water quality. ineretoreal!'aition or [[isintection -Z:to-..t:c uusni ..b
acc lm ..a[ .'airea.
DewTcrry Duke Energy Asheville ateam station P[iase 11 PoWle Water Programmatic Evaluation 8

4. Regulatory Permitting
b:..cc tne.c ;-5 ..o wacriine extension associated %%ith this station, North Carolina permits for zricroacnment Agreements,
erosion anQ Seilim�nt..[:o. left. ,1,., as Y0d1:C W..t.a tipNNly uiz iavt na ressal-
Dcwnurry Duke Energy Rs;,evilie steam station Phase 11 PotaEle crater Programmatic Evaluation 9

5. Schedule
The Phase It project schedule is provided in rtppenllix C.
i ne senettuie was prepares :- p-rt to .ne: :testy.—.e dates accdca to co..—.pl, :rth House Bill 63o which states the following:
■ "No later Than Lecember 15, 2ota an impounllment owner snau suDmit i.-.te.--atCo on ,Ur ..ne!A nepl..�etncnt .:utc.-
sz;rrilum paopo�cd t., be pro. ided to each household"
• "i ne Lepartment -min Ume-t=tv :nrur.7.12on �un :ttcd d, the i...poa.-.dment owner and render a final decision to approve
or disapprove the plan, inclu'uing written jtntiings or taci no Later in-.-. �a .w..., 15, 207,"
"As our, a. ,..,ctical, but no later than October io, 2o18 :he owner of a coal combustion resiuuai sulTace impounIlment
snap estaDASR re........ent rvrl..Uz� :ant ruter,urpi:a"
'I -Ric acncdulc :.-.dicates DEQ report submittal on December lg, 2013 and Lml j approval by uanuary 15, 2017. 1 Re seneiluic
inciulles an init:..l go a..T re and toz 3t.elop.—.cnt uiid execution of Water Au►hori.y/Duke memorandum of
understanding tiviOui. i ne scnMuie is suuject to cnange aepenaent zr...-. tne-ileatvne dace for the ml3u, the
Kppr r;..1/comments from DEQ, and :he resident input retarding permanent i%ater supply choice.
t he balance of the schwa -we is'ueemett typicat for instanation ei 34 trot.. un cwcist:n5 waterline.
Form .1 design documenwtion and construction bid phase is deemed not requireti. i ne service line instanation w-ula De
perte! ea .7.tn ex:,t:..s Cityof Asncvillc procedures. The schedule indicates a proposed end date of aeptemuer
201i which meets me vciouer 15, 2013 tleathine.
Dewberry Duke Energy Asheville steam stauon Pllase 11 Potaaie water Programmauc E...la..tib.. 10

G. Opinion of Probable Cost
'rRr, rnu.c a opinio.r, of probable cost is provided in Appendix D. The opinion of probable cost was prepare'a in accordance
N6in me oasis or- Ilcos . eac=c :. zimt:o.. a.a at tn:, mFort.
'rn, op:..;o,. or probable cost indicates W Lhe .owl es.ima►ed construction cost is approximaiety 5390,000, wnien equates [�
approximat�i, $9,Boo VeF HoZw.nol8. A 7o% co at:escn4T w :nc1:.3c3.
me rn...c 11 opinion of probable cost includes individual allocations for the service connection pines and meters (items 18
Mrougn 23) Lnat vga-ic to app�^� �tc1T $-,i,00 pc, is : cam -motor.. we arrived at that allocation as follows:
ror items is and 19 We service fine iengins were measurett Tor a-cn non-ano13 n..ins tnc M....11 Iicct m..ppins. Item 20
w for miscellaneous fitJns,, associated ti+nth the service line connections. Hem 21 is for pressure reducing mr es peiem".auT
ror items 22 ant! 23 we meter/meter nox anowance was ate"lvlopca ro : c..3o. u7.3 tram .cent bid
tabulations for similar projecu,.
. 11cM 24 w fo. MA cia—lrq .:: nick tnc noQ.cno13 to nc served is on the opposite side of .he road from the water line.
• items 25 and 25 represent site cosh assoeiaiM Arun wpp�e.:-aie1� 9,00e fcct of ..r-W V CC l;;.c piping.
VDw1jcrry- Duke Energy m0evllle Steam station Pnase 11 PotaEle water Programmatic E;-Iw.tiew t

Appendix A: Asheville Station
Phase II Mapping
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Permanenr Warer Supply Proposal ro DEQ - Suuon
Sutton Steam Station
New Hanove, County
14 eligible households
Duke Energy has evaluateti d1e reasiOilky ana costs of proviQing a permanent replacernunt
water supply to eligible households, as required under G.S. 11 1 kc 1) of Rouse Bill
630. Huasahulds were designated as "eligible" if any portion of a parcel of land crosseG Ime
mile compliance buffer described in HB630 and if the household currently utilized well water or
buttlud ..atur (under Duke Energy's bottled water program) as the drinking wate, suorce.
/Although H8630 indicates that huuoswhalds are to bz covered, all of the locations ide, itified by
ualte Energy aroana 6auan are business, offices, factories, or induutr ial k-Ocatiuns.
Undeveluped parcels were identified Out were not considerea "aligiDle" Because groundwater
wells are not currently utilized as a drinking source.
Dewberry, a respectea outside vendor, conaucteo Me PoiaDle Water Programmatic Evalaati-wn
(attached); the evaluation consisted of a survey of eflgiMe nousellolds anti a preliminary
engineering evaluation, uost estimate and schedule. Dewberry's report, for the most part,
assumes one metered connection per parcel; therfire, multiple buildings on the industrial
properties may be sarviced by one connection.
The Cape Fear Public Utility Authority (CFPUA) already has a municipal line located along
Metro Circle and purtions of Fredricksun Road; therefore six (6) of the locations would require
only service linen r anuiny in distanco from 100 feet (on Fradrickaun Road) to 730 feet (to the
inaastry located on Transcom Ct). To serve the remaining ei-Wht (8) locations, water line
extensions would De regairea on Osten (approximately 1.7 miles) and on Fjedrick5on Road
(apprximately 8zF0 feet), and a new line wouia Be requires on ciuuon Lake Road (approximately
225 feet).
Dewberry estimates that it will cost $ i jol],000, or $139,000 for each location to ycnnuct tc the
CFPUA system. Even if water connections are provides to Muse locations only requiring
service line =neutions, the cost would be approximately $356,000, or $5a,z;00 eacn. ror trans
reasun, Duke Energy recommends water treatment systems for all 14 locations.
The Dewberry evaluation includes a prject 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 CFPUA by Ape it 2018. From initial discussions with the CFPUA
and an avaluation of the system by DEvvb�rry, the CFPUA has adequate water capacity and the
water quality could be maintained. If ..atar treatment syatams are installed, Doke anticipates
Mat A systems will Oe installed by the end of 2017.
The performance standard for the public water systam is the Federal MCLs. The performance
standard for the water treatment system is also the Fadarl MCI-3 a,,capt for those constituents
idemiaea in c0 i D as Raving potential health concerns: pranic, haxavalent chromium, cobalt,
iron, lead, manganese, sulraw anti vanadium. For these constituents, the perFrmanca
fU
� Durct
ENERGY.

Permanent Water SuppIv Proposal to DES! - Sutton
stantlaru will Be either one-half of the MCL, or the appropriate state standard, ..hichever is more
protective.
uuke Energy is currently evaluating an lun filtratiun tmatrnunt system; this aystcm has begin
successrally installeu in Omer parts of tMe state, and initial results show it parfu,rmu ..III in
reducing vanadium and hexavalent chromium, among odler constituents. i fie costs snown
below are for a conceptual residential ion filtration treatment system. The anal water treatment
system will b� based upon the results of field studies. Treatment systems will be sited to meet
th7u potable water needs of the business and indost, ial locations.
Duke Energy has made efforts to identify all eligible households, but it is anticipated that a
nominal number of addit;vnal households will be identified daring the initial outreach effort
uunduct7d upon app, oval of this plan by NCDEQ. If the final numbs, of households, or the final
number of households opting fur publ;c ..atur aupply, results in a conLlcsion d;ffsr-=rt than those
stateo in this preliminary plan; Duke Energy will revise and submit the nu.. PIE., to NCDEQ fur
evaluation and approval. vved owners will Be re5pon56s for maRing the decision for their
paiuels. Only households within the mile boundary and served By well water at the time or
the submittal of this plan will be eligible for a permanent water supply as part of 1­1136aU.
c UU&C
ENERGY.

Pernranenr Warer Supply Proposal ro DEQ - Strrron
Ion Filtration Water
Treatment System
Total Number Recommended
14
Water Quali Criteria
Meets applicable water quaky
standards Federal MCLs
Tes,
uromp lesion sclleOule
Estimates com ietion tlate
1=017
Confinoency factors
NIA
Operational Considerations
Required acceptance level to
achieve consistent water quality and
NIA
supply
Required acceptance level to
achieve targeted cost per eligible
NIA
nousenoltj �$. otir fousenolti
Location of households relative to
NIA
existing municipal water lines
Other considerations
Costs
Total Installation Costs
$98,000 - $140.000
rtpproximate cost per eligible
$r,'u'u'u - $1'u,17Q'u
household
annualwiaintenanceCosts
$r 009-$ca'am
Maintenance cost per 1louseMoie
- $Z,'u'ut7
annually$01717
IQon-Gutce Costs
_
i otal autirm-tau ..ater bills monthly+
NIA
Estimated water bills monthly per
NIA
nva.01`10119
, _ _
Ongoing municipality costs for
maintenance and flushing due to
NIA
low-nowrlow-usa�
Total Costs
l7ulte ant! non-GuRe
Total estimated cost for all eligible
$168,OOD - $42D,Doa
net Ml3ors over i 0 ears
Total estimated cost for each eligible
$12,DOD - $3D,DD0
rei l`115am o�er 10 year.
Dina
EMEKGT.

Dewberry
Sutton Stuam Station Phase II
Potable Water Programmatic
Evaluation
QaRe Enaryy
December 8, 2016
i
7
508MIi it138Y.
Dewberry
2610 Wr,.liff Road
w16 410
Raleign, IQC v6Qr
3GIMIiicG 10-
Deka Energy

i able of Contents
E..oclltt-ia 5ummamy...............................................................................................0
1. Introduction and Projec. Approacll..............................................................0
z. rhase II Basis o1 Design ................................................................................6
2.1 rotante water Connoetie . m-t t.;;.s..............................................................6
2.2 m� :ie6,...i rotanle vv .ter Cormcct".oR Opinion of Probable Cos►.................6
J. tilt. Allalr.iZ...................................................................................................I
3.1 Station Maut,ing and Household L,aw.......................................................... 7
3.2 Field Obsen'aLions..........................................................................................7
3.3 muter Consklerations..................................................................................... m
a. Regulatory Permitting....................................................................................9
5. scn.aele........................................................................................................10
G. upinioR of Probable Cost............................................................................ I I
Appenalx A: sutton 5tadon Priase II Mapping
Appendix ts: 5unon mad,om Ranz.nola t]ata Spread3newt
AppaRai;; C: sefiieaalo
App.ndix D: Opinion of Probable Cos.
19 Dewberry- Duke Energy Sutton 5team Station Yli..eo 11 Potable w-tar Freimmmatio Evalc.tivn 1

Executive Summary
i nis rnase tt evaluation is struete.en tQ eo-piT : ltn the .cye:- ac its of Nortn Camlin. t'tou.c [sill 630:
bcd'o:. T3oA-3o7.z!..(r,) at mouse Sill 630 requires provision of permanent water supply for each household that has a
Srinl:ing rater suppiy tren tooatctl to:. - tT2 I.om tn.—tabcanRl co—,pli...,t:c boundary of a coal combustion
residuals impoundment, and is not separated from the impoundment Dy the mainstem of a river, or other DoaT at "—Icr tn..t
::solo p.:.cnt the Rligl'eGon of contaminants through groundwater from the impoundment to a well.
To address the provisions of house Dill Ujo, uewberry peflbrmell utis rnase ii preiiminary engineers...s to ziuppi,
,,...table ;.Wtcr to .w:aeuts within a 1/2 mile of the compliance boundary. Preparation of this report is imende'C to comply %%itll
me house nin Sao retiuf.emc-t to -..xe- ,-port to Inc Nortil C...zl:.... lj :purtrntent of Environmental Quality (DEQ)
by December 15, 2013.
On LJeee De; 1, 2015 .. p .sect mectiT-g :.;.a n,10 ..t Inc Cupe 1'c..: rebl'., Utility Authority (CFPUA) office (.he originally'
scheduled review meeting was cancenetl 'Cue to nurricane maitnew retain emergencies). Ices.—c..tat:: e. tro IJelte E..c.gT,
ue::bery, and CFPUA attended the meeting.
LmMiled chase it mapping was 0eveiopell using t-4ew nanover County property maps in-t .,no:: �_rn Roe.,eno0 i.. tnr v2
compliance buffer. Dewberry visually observed the households shown on the chase a mapping on uecemaer 1, 2016.
n database was developer using tvew nanover wunty tax recorM ties! to me Gis .,n..pc nit .rnien 1?lc;.t:np Inc p;vperty
owner and the address for each household within the 1/2 mile compliance buffer.
r► schedule was preparM in part to snots milestone Gates neOctl to eo-t.IT : ;tn Ho-.,e tsin Sao ,. n:en
• Report submittal to the NoRh Carolina DEQ no later ►han ,jecember 1:,, 2015.
lyu.Q rv..Hc u nnul acci.2,vi. to Wppra c or a:—ppro: a the report no later than January io, 2oli.
• rermanent replacement water suppties are pro -non : o I..tv. tn-.. U.toDc;- ;3, zors.
It v..en of Env Mflimto..c a..ta Wi=, the schedule indicates that project completion can occur in tipril of 2013 which meets
Tie house Diu 630 senetlute requirement tar permanent �t l..cc e.-.t ::..ter aarYi:c3.
An up:i.;ou of p. ub..blc most ;r..3 developed to protiide potable water service :o i4 households within the ;7z mile compliance
uuner. i ne estimateli costs are summ«ri;;ca Delo7::
Potable Water Service 14 Households $1,950,000
PoiMe Ywaier zwMce per ttouseM10 , s, 3lr,000
Inc petaDle eo..neeron �.,t v=t:et..te ircleav� u 25% contingency which is deemed consisten► with a project at the
preliminary engineering revel of Eletaii.
Dewberry bulte Energy Sutton steam station Pltaso 11 Pataniy W,.tor Pr'oummrn..tiy E:oloouon 2

rn. zYort rte: -ap Ouit:onal detail on the Project Approach, Basis of Design, and aite HualysiS. 5auon Steam station
mapping is pro%zaeR in AYYe..a:n A. i n. apt-na..r :,. ANNca.a:. ts.'rhe Sutton Steam Station PoLable Water
Schedule is pro%ided in rEppendix C, and the opinion of rrooawe Cost is protiseR in Apre.-.a:- u.
Dewberry Deka Energy Sutton 5tvom Statt.n Pfiva. 11 Po.abie Water Programmatic Lgvaluauon 3

1. Introduction and Project Approach
PROJECT INTRODUCTION
Luring the rnase i programmatic potable water e%mivation Ilesmop stutly, eonee A Ic7e1 - .rr�-s :-n— 8�: elort i3 .,Cte; :.-.g tn.
Sutton Steam Station location, the potential potable water lie -in IocaLion, and potential pipe routing to resi'uems i%itnin a vz
-le o[ Ll:e eolnrl:....mac ooe-.d...—,, we w. ca the rn...c I .—...pp:ns to develop a concert level cost estimate MiLh a 4o%
contingency. Luring this rnase it evaluation suliicieni preliminary design vrorK n— Dee.. redo- �ts8 to rrvr.,rc �[:-ute
with a 23% contingency.
t his rhase It ekaivadon is structureti to comply Mm me requirements of north HVZ. a is:u 53w: seet:o.-. Y3vA-
3oy.2tt.(ci), which requires provision of permanent water supply for each household Mai nas a'urinxing waier supply wen.
10eaLM :[n:.-, u �9-2 -:le r..diea tr.,.a. the catabl.ned cvnlpli....ce bounda.—y of a coal combustion residuals impoundment, and is
not separaiets Irom Ine impoundmem oy me mainstem or a river, or mine'
Door of -4..tv. tnat ::anM t.:cre.nt tn. ;.-L:graiv„ at
comaminanw through groundwater from the impoundment io a well.
to aSnlress me provisions of house join 530 relerenCM aDe:e Lc:: De.., n..., rertvr-ea ., rn—e i s cem.:.-.g 1C+e1 and
this Phase II preliminary engineering evaluation of the technical and economic wasioi ity to supply municipal potable rater to
. �Rl Tits .rM2 ... T/a .wile ra1z;3 at the cvRlpli...al a boundary. The Phase II evalua►ion results will be submitted to the North
Mrodna Lepanment of Lmironmentai Quality (LnQ) D,, uecamnee 15, 2016 uu et y-a: -8 b, Howe n:u S3o.
U. HE VaI31. l,, ...unable ;,.to.,,�. Gon uewbe.—y evaluated the following criteria to perform the Phase II Sutton Steam station
preliminary engineering study:
• Identified public road right-of-way widths and oi%mership along Lne pipe route
■ h alw..tud tcn.ibility to install the proposed water line within the unpaved shoulder of an NC ML roadway
Locumentetl approxim»te immCon o[ u.s.tHelZ;9'.75 rozslble ct]..TAL alto:: a tt. U.S. F-11 & Wildlife Service
National Wetlands Inventory (as applicable)
• identified potential'urisdictional and permitting authorities to establish permitting needs
- rstimaictl potential etr.,e-ant ..eye.:i;vn ..rt:..., (—t2-atM 34e..- Ioot..gc at parcels affected)
. z alua Led potential conflicw with known existing utilities
Estimated the pipeline length and pipe diameLer(s) for the water line and the individual service lines
■ J valuatetl me rv[c :t:..l : eetl I n. boorter rernr 3tat'.o.-, or cice .tM t..,.K tv au.tain Auquate .rater pressure
nvalua led the water age and potential nett for suppiemenial disinfection
Evaluated the potential need/regquiremenL for fire hpdranFs and hydrant quantity
• h%1-..1ea ro[ent'.-I oo.-...trvvt,on-clfloi35..ro enauer-.V=
■ cvaluaLed potendar municipal water sysiem future improvements o»setl or rwD1"nA C..ra31 i-rrv7ente,.t rlu. (Ctr) or
published Master Plan
fODewberry VuRe Energy Sutton steam station Phase II Potable w.tor P.oarernm-ti. E:olaano.. 4

PROJECT APPROACH
uewuerrycontactetf Lae uuhe energy Community meiadons uist. M ma--scr to a:zien= tnz Z.VC130 to eaeewte Me
Phase II evaluations, and .o arrange for a subsequen. meeting %%rith the local wafer purveyor, the Crrun.
A project review meeting %%gas IIeM on uecemoer t, 2016 at the Crr uA emcee!: w:i .s[o.., NC to 13.Lca.,z5 exeeut:o.-. of In' —
Phase II preliminary evaluation and subsequent project execution (the originally scheduled review meeting was canceuea Ifue
to tizzricur.c Mattnew r,-i.ted c... rrgc..cic3). xci cntnt,ves from Duke Energy, Dewberry, and CFPUA a<<ended the meeting.
f Re primary purpose of me meeting was to connrm the ware.- ttis[riow[:o. , te.: t..c-:. Ioe..t:o.., ,, �teRt rr�a �, r;I c a;zc,
and Water yuali►y a..he tie -location, capacity limitations, and whether there are future piannett water system projects ilia!
comtd :-p..et tnc rh...,1L c:tiluetio.a. A di:;c-n, observation of the Ah mile compliance area was performed December t, M6.
During Phase I Dewberry obtained municipality mapping of the potable Crater distrioution system anti inen tieveiopeti [hart
talc swtton 51can[ Station, tfiic—poet:.e t..,table .eater distribution system tie-in location, and the %%-ater line
pipe routing. we usetl the uuFe energy urintii.s w..te. tceeertor s�re,� ter st..t:on3 i3c:clvpcd :. moo.. to
show compliance boundaries and the water supply Wells %%ithin a 1/2 mire of ttfe compliance oounnary. L Re maps were
t,.—pu�ca using Ults uo Inc vmf. M.
During Phase II We developed more detailed mapping based on r4ew rianover County property maps to ittentify property
o�..cra W.ad naa.cnold Adresses ,rithin the 1/2 mile compliance buffer.
Using the Phase II mapping a database of property o+utters and housenom locations %vas tleveiopetf. uewoerry also contactO
in, CrrUA to Conn. a.. residents along the existing Water lines %%zthin the compliance buffer Who are connected to the system.
i llis iniorm_dt . -no Ul for .de..t:neet:c.. of 7ca,dc7ts :;no :'cue Ioeate� ..Iv..g tic cxetins ;:..tc. li:.c but ..ot connected to the
water system. vve also prepared a project schedule.
uer. ne..; Lnc : lle: eiof.e8 ..7 vr:n:on at Yrobabic coat to. -tic :nat..11aGvn Kt plying Mmst. acture to the potable .rater tie-in
location. vre used vendor budgetarycosts for ule primary capiAi equipment anti uses cost factors to estimate ine in..[..u..[:o .
costs. We did not obtain contractor installation cos. estimates for this evaluation. vewberry reviewed the cosi daia with t,uKe
r.ne.. to oDLo:: eenczRe.-.ems an tic .--cinedotywr and tnc ono ..�.cca upp{lea.
Dewberry Duke Energy Sutton Steam 5tation Phase 11 Potable ester Proumm-rtio : ala_ue.-. s

2. Phase II Basis of Design
Ine purpose or tnis section is to tloeu ment D--ie oFaa:g-. o .� yt:vex tnht ::eac Z;�ca to yi`y.. - tn, �ii. ttoT. `.itcui. Stwtio ri
mapping, opinion of cosy and schedule.
2.1 POTABLE WATER CONNECTION MAPPING
try assumptions for [he potable water connection mapping areas iouows:
• Mutable .rater pipins is routed alons state roads and will use municipality/county existing easement-, where possible.
• Yv Vie; I..., -'...w kY.N. 1:.-.e c..Zic...c.,1S :`n not be uxa to::-..tauatiom of tnC potwbl.. ;t atei yiY...g.
2.2 MUNICIPAL PO 1 ABEE VVA i ER C;uAIQE41 iuN UP119ION OF
PROBABLE COST
my assumptions ror the potanie eater ea. needy . ee.,t eat -..ter ..re rc iouo7r .:
Item ion the cost estimate shows -o inch C-yoo rYC for the potable water tine pipe. i ae o incti tliameter is consitlerea a
coma,.. Kt-: c p:pc a:%c to ...,Cct the .rater demand of the households within the compliance buffer and complies UiLh the
Crl-us uesign stanCartts, ws Zlisea—M Zlw:..s Inc lJeee ne.-., Z076 aeetins :�tn CrYUA.
Items i through / on the cost estimate show material cost for We piping, A-aives, antl associatetl fittings. 1 ne sum or items i
separate line item. A 30% cost factor is then applied to the summed value to estimate the cost to
instau the pipe, tel: ee, w :a rttti.-So. 1 nc cost eel: -etc ye..a.t:tiea ...-c Dram OR tnc Stcuml btatiom iappiit, and
assumptions stated on the cost estimate. i he unit costs are uasetl upon ventlor outlgetary costs anti cost ltata we na : e t
.e Cnt 3i.,.:lar p%ects.
1 ne w or yw..ai[:a Iv. ile-.. 20 ..,-.8 2.- vn Inc voot tnc;c w.c ivy pot -aisle ...tc. con.-mcGons. Each of
the izF connections is proposed to be connected to a two inch senrice tap since eatffl con necrion is a commercial or
industrial facility.
or cv..�.eet;an...nv:- im the rnJ vt: a..[c :a 13-0 upvu tnc Nc;` Cou.aty property maps, drive -by
observations, and from exclusion or -customers teat are presenuy oeing semetl witn Crrua water.
■ Items 8 throush 16 and items 20 ►hrough 25 are installed cost, so a So% installation cost factor titers not applied.
■ 1[c a, In -z;P 77 u .�terirl coat, .moo .. 3e96 Comet l..ctua ;ra. applied.
items t through 25 are summetl anti snown as a 3uni ri LA .,. Cost factors are inen appiig to tnc ,,iutSly lAL to cut:-..tt:
the balance of the p%ect cost. We have applied a 2o% coniingency which is deemed consistent ttith a preliminary
ens:n��.-:fig er11s..[iva..
r►utlidonai assumptions Mar lietvoerry USM to prepare the cost estimates are previlietl -- Iovl �.etea va. Inc coat on ..te
Table.
Co...d:'t:o.,a c .nelz;dEU 1.,. [tic 01l...Gon of on -site construction phase activities.
10 Dewberry Duke Energy autton Steam station 1911ase ii Potable Water Programmatic E:ole_uee 6

3. Site Analysis
3.1 STATION MAPPING AND HOUSEHOLD DATA
The Phase Il overall mapping in appendixn shows tiro proposed tie-in locations to ine existing Crru,% palaole ;late. --Fri;
Inlet app.on:.-...tely two miles of netr potable water piping is required to serve households within the 1/2
mile eompfiance ouner. i ne propo,,M Re;:' ...c ..0 eoRr er`:ul o: ;,-.awoti:ut tacititiee.
Ck'FUA no. :e.ball, ..breed to o,rn the infrastructure and manage Lhe vvaiersupply, operation and maintenance tui¢rnt), an'u
metering7Diuing of eater use to.- ine aw .-WIM Femme nd ac.'• :Cc , amicct".0u..
7 tic YH..t it 52jtc ...ap and sheets in Appendix A were prepared by overlaying New Hanover County property maps onto Life
compliance Doundaries M-6.0 :.. me u..Kc l;-.c.—f„ li.:.-.K; .s water Keeeptor ba %ys Ior Coal -tired Power Stations developed
in 2oizF. The mppendix.L aiLe map shows the yz mile compliance ouner an'a six rectttngufar sheet map—t.e... f llrae u -_'
ahcct-s iim.t.atc the area of interest and the water line route and service line connections within the ;,g mile compliance ouner.
The database in appendix n was created from the fvew nanover County tax records tied to mci uw ..nape nie 4n:en ;$e..l:tam
tlfc property owner and the address for each household within the 1/2 mile compliance buffer, including parcels of fans wim
no resitienrs (e rty Let). l ne r...ccr 8..ta r..,tca K77 Inc-prcaFssnccfs ..too :.,ciadc p... eel lD, Land Use, Easement Requirement,
and anticipated water remand for each property.
3.2 FIELD OBSERVATIONS
tu. shown in tAppendixn, the water line piping vein Lie instaued along state roads, wnere pass:otc. u..=s Inc Uece nc.- i, -o75
drive -by De.rbet—y did not observe rail road crossing., or other above grade conflicting physical features inai are anticipated to
nave a signineent impart an the tm.-,t—. ct'eR caJ o. �cFledal_.
Based on our observations and Lhe Phase II mapping, it appears to be technically feasible to insLau ine potame water tine in the
puofie — a =sat el" ;-�, e...ro.as Inc .,:ac of Inc p.::..tc MA., c0.;7c.,Go..al construction methods, such as an open trench
with pipe bedding maLeriat. Kpproximatefy seven service fine road erossins:. ; n ne;-_q .XM ;rtfi one . 4te. I:.-.e read cro.:ngs
anticipated. Road crossing, are planned io be subsurface boring to avoid open road cuts, and Lranic impacts.
uewberry'ui'u not ooserve surface water or apparent v-euand
and the U.S. Fish & Wildlife Service National Wetlands ,rtveniory.
vuring Lne drive-oy vewoerry aid not ooserve potential --Ain Knv . �. at:l:t:ca. At rre—nt tnc rz, n.,.3enolds
within Lhe f/z mile compliance buffer do not have public water. LVaLurat gas main mart ers were observed during [tie
nut ..re typieail, tvcateec ..:In:r-. Inc 3tatc mad rirht of say and are smaller in diameter than water piping, therefore they would
not cause a signincant convict. rioeropue m_FKera gr-.c..fse vnse.:ea d. -g Inc i3.:.c-D,. Abo:'ega.,and ci.ctric ;vas observed
and iherefore not considered an impediment to water fine instanation.
uev-Derry observed the puwi. _aa pisnt-of-;-T u.-.ii p,::..te M..13 MUM., ...-.it e...ittutea Inc Ica.ibility to install the proposed
uu Ler line vrzLhin the unpaved shoulder or LvC vU f roadway or ►vntnin me private roata snoufiTer. i.-........., in.[ ;-c cv.t8 not
dctc.m:.ae rirht of say status (public or noL) or areas where private property may have been constructed onto riguL of way, We
eitncr p—iaea ......tre7....ee lop —tur l.,.e c..3c-cat, or tnt co.—,.,t. Wct.o, i.a.pact is accounted for in the cost estimate as a
Dewberry puke Enorgy autton steam rotation Pltase 11 PotaBle Water Programmatic E:-.mare 7

reno%ation anowance. rligmray 421 is a Tour lance u5 snt oT :wa, in cert.iii ..yeas.
Therefore, depending upon final design nCijU, permitting may De enanenging in certain areas.
3.3 OTHER CONSIDERATIONS
CFPUR is a large stater system who owns the intrastrucfure, manages ine stater supply, anfl meters ....0 Dal., 1.7::..Ier me
wacw aro-ai.d Inc Sutton Steam Station is served by the Sweeney Water Treatment Plant. The Sweeney r-lanL sources its water
Trom ine C5pe re..,
13..5ca upon our research and discussions itith CFPUA, a 12-inch potable water main currently exists along the west rigui of
�aT et r1:gh4..T 421 south tcFWV:....I,ng neur tnc into -.R1:o-.-:In t-!;iv (... efio:w.-. in Appendix A -Sheet 3). Similarly an fl-
inch water main extends from 3uuon riant ,cuatl norla along r rearicrson Twaff to metro Uir�ic (a., ..no;= :- Ar,ree3�. A -
SFieet 5). CFPUA also has a raw hater main installed «fihin the East. right -of --way along night�ay 421 i,4oPth.
CrruH estimates the system siatic pressure generany ranges From 50-55 psi. Atteroi :s to UrruA, .. 8-:..ieetion
concentration beriween o.3 ppm and 1.o ppm is maintained in the area and the waver age is controlled bash on en,orine
M .1s ana n=..nins. tv rnu4it.iii r.. appropriate disinfection residual and prevent
furtherdisinmction uy-ptuuuct formation in As area.
UrruA, :n r..rt,.e. ,n:p;�fCt 14.;: ri...—.v;e. Co.-.ty, pr,.. u .ti, in dcl..il 8ea;5n phase to install a new 16 inch hater main along
the u3 421 right-o,-way nonnwarn io fne render County tine. i fie ne : ; w[e: -..:n coAr p ��iie r,vt..nlc tar In, tour
proposed new connections along US 421 shown on Appendix ro Sheetb 1 and 3. Cr rvn stated that consiruction iunaing nas
..at Dec.. .,pp :ems D, N , rla,.v7cr Coaa a..d CrYUA is not certain .when the construction phase would begin. In any case
construction win llxely not De complete Dy the rtis 630 &..al:-e vI alwDe. 15, 20;8. 5:.-.cc title .-.e:7 1:1'FUA plwa.ne� .:utc:.T.ui�t
extension ►%ill not meet the HB 63o deadline, we have included installation of new o inch water main io serve the tour
prvpoaci3 ev ;.-.cetiv,.� alv.-.8 US rz.. Tnr of this new 8 inch water main uill have to coordinated with CFPUrt design
plans for the 16 incn rater main.
CrNUA.,I,., atwtca ttt.,I Ire ca„ant �y.tem pressure in the area near the Sutton Steam S►adon has limiied fire flow (generally
arounlT Soo gpm). wnhe CrruA nas a comprene .a::e ,, ate. act Dat:o . :.a the tlo:. tnMuE'n rn.st of its
system, according io Section 020uo, paragraph 2.05.3rt of the%rrurt vvater uistrioution Waniial4s: "CrruA Woes net
rja.a.w..tcc wacyu..tc me flow to. -protection of life or property". Paragraph 2.o3.8A further siates that a facility may choose to
uiiiize potable v-aier service Tor fire p.otee[:o: p.n;=.ai3$ ,pee:Ilea ev..ng� motion, w.4 tvllo Z1. 5incc M3 63o does not require
fire floe and since Crrt,rt provides for elective fire protection, tnis evaluation assumes mat me tour Facilities ..le.-.s us 421Wu
cicct to reecits potable ,rater service and will elect to keep their existing fire protection systems. 30 this evaluation has not
incltltlea intrastructu to p _-ae 1; - tlo;4 p:..tcctiv.. vtur- Ma. i._ [511..tion of nre hydrants at typical in,ervals.
Dewberry Duke Energy autton Steam otation Phase 11 PotaQle water Programmatic Evaluation 8

4. Regulatory Permitting
The ~cater line design x0l be requiM to atlnere to requirements or me fouowing agencies anal burn
perma will re -quire a separate se, of documenl�.ion and ��nll be submitted individual] fo she respective permitting agency. t Ile
timeline ter wn :u..t ..-8 ..Y,. �. �t Y-oea.t�8 :a. tn- s;ttv.a btc..... 5tat:o.; rotawc w..ter Schedule detailed in Appendix C.
NCDOT Right-ok%-jy Encroachmen. Agreemem, Primary and Secondary nAmds
rgCUbQ, Ot La. -LEI Q-Z..t:ty, ti.vu.O.—.....-ia �;Mimc.,tativi. UK7"t-1 pcza it
• 1-4Cum4, Unzslon of water rwzource, ruotic water 5uppiy rermit
19 Dewberry- QURO Energy Sutton Steam 5tatlon Phase 11 PQtaft W-tur Pr ummmatla E;alsauon 9

5. Schedule
1 ne rnase a p.TUeci ..enmeir-::; pee-7;8e8 : AYYenH: C.
The scniiRlele was prepared in part to show milestone dates needed to comply with House Sill Sao which sees the follo«ing:
" - NO l..le: Ln..N 13eeee7ne! -.§, 2018 ..: ;1nYe�.-,a ca.I v :-.e! 35.,11 a'ubu—iit iR1olTRW1'.oR or. pc,.....iient replacement grater
supplies proposed to be proxided to each housenoRl"
"'1'Fte Department shall evaluate information submiaed by the impuundment owner and render a final decision to approve
e. d m� 1.,-., iotaIedi..-.-tten n-.ai., at tact n01 tca man J - - . "
._."YY' !' S' S" u u u,.uuiy air cl7a/
• "rts soon as practical, but no later tRan Ociooer 15, 2ois the owner of a coal comousdon residuRi suI i«cc i :Yee. d ea
shall establish permanent replacement tvatersupplies"
t he schedule indicates unto report suumittat on uecemoer 15, 200 and urQ approval oy a»nu..ry 15, 2017. 1 nc .,enensic
includes an initial go day neaatiation period for development and execution of a vvater rtuihority/nuke memorandum of
u.adel9t...aai-s (MOU). -I-Re �cnczlzac uwa;ect to C-ftwusc dcp�„ dc,,t upo.a the milestone dales for the MOU, the
approval/comments from unQ, and ine tesiaeni input regarding permanent hater suppi, cnv:cc.
1 ne n..l..„ee o[ Inc acne8 ulc i- dcc Ed typ;atl for K ,.,u.-,icipal ami671-bid-build .rater line improvement project and plans for
all househotds to connect to pumic poLaole water. i Ile scaMule inaicates an end davit: aL AYlil 2018 :mien meets the ueiobc.
in, 2oi8 deadline.
Dewberry buxe Energy Sutton steam 5tatlon erase 11 Petab1w tm..tar Pmir antm_& E:..1v_t1.n 10

6. Opinion of Probdblu Cult
The chase « opinion of probaule cost is proviueti in nppenllix v. i ne opinion of prooaote Cost mar rFParea
with the basis of design criteria in Section 2.2 of .his report.
The opinion of probable cost inuicaies that ute totai estimated construction cost is appro-i--Aci, $1,95o,000, :;n:t:R ye..te..
to approximately $1jy,000 per household. A 25% contingency is included.
i he chase tt opinion of prouame cost inctutles inuivisuaf avocations for the senzee eennrci. .. i:..a ....Zl tell (II.M3 .,
through 23) that equates to approximately $so,000 per new connection. vve arrived at that allocation as touows:
a, ...-.a 78 tnt•,e=eC ii..c lcngtn. . .c ...�u�u,�ii tur cudl household using the Phase II sheet mapping. Item 1y
is for miscevaneous uttings associatM i%itn the service fine connections.
For items 20 through 21 the me¢er/meter box allowance teas developed from vendor quotations anti from recent oitl
t_I3UI.t:e.-.3 to. ,.-:fur r.—J'CCIss.
item 22 is for roan crossings wnere ine nousenota to oe ser _-0 is e : inc err , :te Ate ei the .ova tro- tnt• :..t,i i,..c.
. Items 2 j and 24 represent site cosh associated with approximately S,goo feet of nety senice tine piping.
. 11c- Z3 azt,!'ac+.Is the `uy.tr-M Uc;ciaj rnt,nt Fcc., required for t.ro inch connections to the CFPUAsys►em.
Dewberry, Duke Rnergy Sutton Steam Station Prase it 11

Appendix A: Sutton Station Phase II
Mapping
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Appendix B: Sutton Station
Household Data spreadsheet
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c e e ■ '^ ■ _ ■_ m ve vs m r yy_m � � � ■ v A � ■_ O V _
VI r li r r 4L 4� IV W 9 r P F LL c i i i G C H r
� � rl ei "1 �'1 � TY r'1 � rl e-0 A rl •i rl _ .'1 �"1 � n \
■1 eV erq p G m � � ^ N N \
rl !■
� rl rl N m m ` \ - - w .-1 ■9 !1 � \ - - Q \ e m O m a\i rl \ \
F i i S 5 5 ti i i LL x S i r 3 3 3 3 S i 0
w
0
A
R
fn
m
C �
a
W ° ■ E E 4, U
a E o 0 0 aif
w i n ■ v
a dY c o u :. m
a e E
Q C L 'w w ® —E ® d im
c o _ m _C na on �n E '" c ■+ E _r
E a E Z m E aR a •, s w o m
yr }� ! ri T+ t+' ■ m m =
= am
p c- oaO .
to
R= e
V V_ 4 of o e 0 y m c n■ '~ an d __ 4 =
� a` R c c m N oa o o m O s o i a@
Ga 2c .5 ' E 3 C a C • eK * v E e a m m v m =' +=
E` C= m •• @ d Om o 4 r m N n
a 'E e m d o e s $ m c R o m E u u-
3 7 m— H1 tG f d Z Z Z
"I M �1 C ifd �O P• C! Q1 r W .Nn � � .J ti — N M1 N N N N f�V f�V (M1V N N T
c e e ■ '^ ■ _ ■_ m ve vs m r yy_m � � � ■ v A � ■_ O V _
VI r li r r 4L 4� IV W 9 r P F LL c i i i G C H r
� � rl ei "1 �'1 � TY r'1 � rl e-0 A rl •i rl _ .'1 �"1 � n \
■1 eV erq p G m � � ^ N N \
rl !■
� rl rl N m m ` \ - - w .-1 ■9 !1 � \ - - Q \ e m O m a\i rl \ \
F i i S 5 5 ti i i LL x S i r 3 3 3 3 S i 0
w
0
A
R
fn
m
C �
a
W ° ■ E E 4, U
a E o 0 0 aif
w i n ■ v
a dY c o u :. m
a e E
Q C L 'w w ® —E ® d im
c o _ m _C na on �n E '" c ■+ E _r
E a E Z m E aR a •, s w o m
yr }� ! ri T+ t+' ■ m m =
= am
p c- oaO .
to
R= e
V V_ 4 of o e 0 y m c n■ '~ an d __ 4 =
� a` R c c m N oa o o m O s o i a@
Ga 2c .5 ' E 3 C a C • eK * v E e a m m v m =' +=
E` C= m •• @ d Om o 4 r m N n
a 'E e m d o e s $ m c R o m E u u-
3 7 m— H1 tG f d Z Z Z
"I M �1 C ifd �O P• C! Q1 r W .Nn � � .J ti — N M1 N N N N f�V f�V (M1V N N T

Appendix D: opinion of Probable
Cost
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