Pe1mit No. AR0037842C AFIN: 04-00107 Page

1 STATE CONSTRUCTION PERMIT Permit Number: AR0037842C TO: Southwestern Electric Power Company Flint Creek Power Plant 21797 SWEPCO Plant Road Gentry, AR 72734

Consulting Engineer: American Electric Power P. 0. Box 660164 Dallas, TX 75266 This permit

is your authority

to modifY the wastewater treatment system

in accordance with the permit application
and plans and specifications which were received

on 4115/2013 under authority

of the Arkansas Water and Air Pollution Control Act (Arkansas Code Annotated §8-4-101

et seq. and Arkansas Code Annotated §8-4-20

1 et seq.) and the following terms and conditions. 1. The treatment system shall be modified

in accordance with the final plans and specifications

as approved

by the Arkansas Department

of Environmental Quality (ADEQ).

In case any statement

or representation

in the aforementioned documents

is found

to be incorrect,
this approval may be revoked. 2. Within thirty (30) days of completion

of construction,

a Professional Engineer (PE) registered

in Arkansas shall submit written certification

to the Department (Permits Branch
of the Water Division) that the facility has been constructed

or modified

in accordance with the approved plans and specifications. 3. This permit

is issued

in reliance upon the statements
and representations
made

in the application
and the plans and specifications. Issuance

of a State Construction Permit does not guarantee satisfactory operation

of the treatment system. The permittee shall ensure that water quality standards
are not violated. Any modifications

to the treatment facility necessary

to meet water quality standards
are the responsibility

of the permittee and would require

a modification

to this State Construction Permit. 4. A State Construction Permit for

a modification

of an existing wastewater treatment facility does not constitute

an NPDES permit. Issuance

of

a State Construction Permit for construction

or modification

of
a treatment system

in no way guarantees

or assumes that an application

for an NPDES permit

to operate the system will be approved

or an NPDES permit will be issued. 5. A complete "Operations
and Maintenance (O&M) Manual"

of the wastewater treatment system shall be developed

by the engineering consultant

for the operator's
use before the plant

is in operation. 6. If the construction

site will disturb

in excess
of one

( 1) acre, the permittee
must comply with the terms of the Storm water Construction General Penn

it Number ARR 150000 prior
to the stmi of construction.
Best Management Practices (BMPs) must be in place regardless

of the size. 7. This facility

is located

as follows: Latitude:
36° 15' 24.703" Longitude:

94° 31' 59.407; approximately

3 miles southwest

of Gentry

in Benton County, Arkansas.8. The receiving waters named:

Permit No. AR0037842C AFIN: 04-00107 Page

2 Outfall 001: Little Flint Creek, thence

to Flint Creek

in Segment

31 of the Arkansas River Basin. Outfalls

10
I and 401: SWEPCO Reservoir, thence

to Little Flint Creek, thence

to Flint Creek

in Segment

31 of the Arkansas River Basin. The outfalls are located

at the following coordinates: Outfall 001: Latitude:
36° 14' 0.366"; Longitude:

94° 33' 05.944" Outfall

10 I: Latitude:
36° 14' 59.38"; Longitude:
94° 31' 34.90" Outfall401: Latitude:
36° 15' 29.17"; Longitude: 94°31' 33.80" 9. The construction
will include the landfill leachate treatment system consisting

of feed tank, and three (3) bioreactors (ABMet system) followed

by the effluent storage tank. Additionally, backwash waste tank, sulfuric acid storage tank, leachate pump station, and other equipment needed

to operate and control the leachate treatment system will be constructed/installed.

The previously approved components

of the landfill leachate treatment system include the leachate storage pond with

a total volume
of 38,750 cubic feet and the contact stormwater pond with

a total volume
of 388,800 cubic feet (the previously issued construction permit effective 111/2013 erroneously listed volume

of contact stormwater pond
as 38,740 cubic feet). The proposed construction
also includes

a 15,000 gallon settling tank used
in the landfill truck wash system. Effective Date: October

1, 20

I 3 Deputy Director Arkansas Department

of Environmental QualityFINALSTATEMENTOFBASISForafinalStateConstructionPermitNumberAR0037842C.Theissuingofficeis:ArkansasDepartmentofEnvironmentalQuality5301NorthshoreDriveNorthLittleRock,Arkansas72118Theapplicantis:SouthwesternElectricPowerCompanyFlintCreekPowerPlant21797SWEPCOPlantRoadGentry,AR727341.BASISFORPERMITANDCONDITIONSPageIofStatementofBasisPermitNo.AR0037842CAFIN:04-00107ThispermitisyourauthoritytomodifYthewastewatertreatmentsysteminaccordancewiththepermitapplicationandplansandspecificationswhichwerereceivedon4115/2013.TheissuanceofthepermitandconditionsarebasedontheArkansasWaterandAirPollutionControlAct(ArkansasCodeAnnotated§8-4-101etseq.andArkansasCodeAnnotated§8-4-101etseq.),ArkansasPollutionControlandEcologyCommission(APCEC)RegulationNo.6.202,NPDESDischargepermitAR0037842C,and40CFR122.26.Specificpermitconditionsandtheirsourcesarelistedasfollows:Conditions1,2,3,4,5,7,and8areself-explanatory.Condition6isbasedon40CFR122.26(b)(l5).Condition9isbasedonsubmittedapplicationandPlansandSpecifications.2.SOURCES1.ApplicationFormIandPlansandSpecificationsdated4/15/2013.2.APC&ECReg.6,Reg.8,andReg.93.ConstructionPermitAR0037842Ceffective1/1/20134.A.C.A.§8-4-217(b)(I)(C)5.40CFR122.263.CONTACTPERSONTheADEQcontactpersonforsubmittingwrittencomments,requestinginformation,orobtainingcopiesoftheapplication,permit,andtheStatementofBasisis:MmysiaJastrzebski,P.E.NPDESBranch,WaterDivisionArkansasDepattmentofEnvironmentalQuality530INorthshoreDriveNotthLittleRock,Arkansas72118-5317(87)446-5939