a:AMERICANELECfRICPOWERNovember13,2014ViaE-mailandRegularMailMr.PhillipFlandersUSEPAHeadquartersWilliamJeffersonClintonBuilding1200PennsylvaniaAvenue,N.W.MailCode:4303TWashington,DC20460Re:EPASection308DataRequestAmericanElectricPowerJohnE_AmosPlantDearMr.Flanders:AmericanElectricPower1R1vers1dePlazaColumbus,OH43215-2373AEP.comThisisinresponsetotheOctober30,2014,letterfromRobertK.Wood,whichwashanddeliveredtomeonNovember3,2014.Theletterrequestsinformation,pursuanttoSection308oftheAct,33U.S.C.1318,onpilot-scalefluegasdesulfurization(FGD)wastewatertreatmenttestsconductedatAmericanElectricPower'sJohnE.AmosPlant,andotherfacilities,sinceJanuary1,2010.TheEPAdatarequestincludesthirteenquestionsseekinginformationonthepilotstudy,aswellasonFGDoperation,FGDwastewatertreatment,thechemistryofthewastewater,generalanddetailedprocessflowdiagrams,thetypeandsourceofcoalusedattheplant,andelectricgenerationoutput.EPAisalsorequestingsupplementalinformationtofurtherevaluatethequalityofthedata,includingextensiveindividualsampleresultsandassociatedqualityassuranceandcontroldata.TheinformationistobeprovidedbyNovember21,2014.Pilot-scalestudiesofFGDwastewatertreatmentwereconductedattheAmericanElectricPower(AEP)JohnE.AmosPlantduring2014.ThesestudieswereconductedinpartnershipwiththeElectricPowerResearchInstitute(EPRI),severalotherelectricutilitycompaniesandwatertreatmentcompanies.Weareintheprocessofcollectingtherequestedinformation,however,duetothecomplexityofthestudypartnershipandtheformatinwhichEPAhasrequestedthattheinformationbeprovided,AEPisrequestingatwo-weekextensionofthedeadlinetoDecember5,2014.

# These research

and development

studies

were conducted pursuant

to agreements

that contain express confidentiality

provisions

and

we intend

to make

a request

for treatment

of certain

of

th

e information

as confidential

business information

pursuant

to the Agency's implementing regulations

under

40 CFR
Part

2. We hope

to provide sufficient information

with

our response

to adequately

support

that request

for confidential
treatment

of data collected

with

the study partners to protect

this

or similar information

in the context

of the proprietary

nature

of the pilot study. To begin preparing

our response,

we are working

with

our internal laboratory

to obtain

the analytical

and QA/QC

data, developing

the requested
process

flow diagrams, obtaining

the coal supply information,

and preparing

the data spreadsheets

provided

by EPA.

We must work
with

the facility managers

and operational personnel

to obtain much

of this information

. In addition,

we must

be sensitive

to our contractual obligations

with

the other pilot study participants.

Given

the complexity

of the response

and
the number

of questions involved,

we believe

the requested deadline extension

is as soon

as this information

can reasonably

be provided

. Your prompt

reply would

be greatly appreciated.

If you have

any questions concerning

this extension

request

, please contact

me

at (614) 716-1255

or

at twlohner

@ aep.com.

Thank

you

for your assistance. Very truly yours

, Timothy

W. Lohner

Ph.D. Environmental

Services cc: Ron Jordan

- USEPA