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Ash Grove Cement CompanyPermit #: 0075-AOP-R16AFIN: 41 00001Table of ContentsSECTION I: FACILITY INFORMATION . 5SECTION II: INTRODUCTION . 6Summary of Permit Activity . 6Process Description. 6Regulations . 10Emission Summary . 11SECTION III: PERMIT HISTORY. 27SECTION IV: SPECIFIC CONDITIONS . 32Material Handling Transfer Point Emissions Subject to 40 CFR 63, Subpart LLL . 32Dust Collectors Subject to 40 CFR 63, Subpart LLL . 41Uncontrolled Material Handling Emissions Points. 55SN-211.BF1 & 311.BF1 . 59Storage Piles. 61Dust Collectors subject to 40 CFR 60, Subpart OOO . 65Material Transfer Points Subject to 40 CFR Part 60, Subpart OOO . 72Sources Subject to 40 CFR Part 60, Subpart Y . 79LWDF Sources. 82Sources Subject to 40 CFR Part 63, Subpart EEE . 144SN-710.EG10 . 174Haul Roads . 178Enclosed Transfer Points . 184SECTION V: COMPLIANCE PLAN AND SCHEDULE. 185SECTION VI: PLANTWIDE CONDITIONS. 186NESHAP LLL Requirements . 187Title VI Provisions . 202Permit Shield. 203SECTION VII: INSIGNIFICANT ACTIVITIES . 208SECTION VIII: GENERAL PROVISIONS . 209Appendix A – Continuous Emission Monitoring Systems ConditionsAppendix B – Enclosed Transfer PointsAppendix C – AP-42 Section 13.2.4Appendix D – Plant Haul Road Fugitive Dust Control PlanAppendix E – 40 CFR Part 60, Subpart KbAppendix F – 40 CFR Part 60, Subpart YAppendix G – 40 CFR Part 60, Subpart OOOAppendix H – 40 CFR Part 60, Subpart IIIIAppendix I – 40 CFR Part 61, Subpart FFAppendix J – 40 CFR Part 63, Subpart DDAppendix K – 40 CFR Part 63, Subpart EEEAppendix L – 40 CFR Part 63, Subpart LLLAppendix M – Road Watering Volumes Requirements by Road SectionAppendix N – Summary of HWC MACT Operating Parameter Limits for Ash Grove ForemanAppendix O – 40 CFR Part 63, Subpart G2

Ash Grove Cement CompanyPermit #: 0075-AOP-R16AFIN: 41 00001Appendix P – 40 CFR Part 63, Subpart XXAppendix Q – Ash Grove Cement EPA Consent Decree3

Ash Grove Cement CompanyPermit #: 0075-AOP-R16AFIN: 41 00001List of Acronyms and AbbreviationsA.C.A.Arkansas Code AnnotatedAFINADEQ Facility Identification NumberCFRCode of Federal RegulationsCOCarbon MonoxideHAPHazardous Air Pollutantlb/hrPound Per HourMVACMotor Vehicle Air ConditionerNo.NumberNOxNitrogen OxidePMParticulate MatterPM10Particulate Matter Smaller Than Ten MicronsSNAPSignificant New Alternatives Program (SNAP)SO2Sulfur DioxideSSMStartup, Shutdown, and Malfunction PlanTpyTons Per YearUTMUniversal Transverse MercatorVOCVolatile Organic Compound4

Ash Grove Cement CompanyPermit #: 0075-AOP-R16AFIN: 41 00001SECTION I: FACILITY INFORMATIONPERMITTEE:Ash Grove Cement CompanyAFIN:41 00001PERMIT NUMBER:0075-AOP-R16FACILITY ADDRESS:4343 Highway 108Foreman, AR 71836MAILING ADDRESS:4343 Highway 108Foreman, AR 71836COUNTY:Little River CountyCONTACT NAME:David DorrisCONTACT POSITION:Plant ManagerTELEPHONE NUMBER:(870) 542-3010REVIEWING ENGINEER: Joseph HurtUTM North South (Y):Zone 15: 3729281.26 mUTM East West (X):Zone 15: 368114.75 m5

Ash Grove Cement CompanyPermit #: 0075-AOP-R16AFIN: 41 00001AGC utilizes non-hazardous waste materials as raw material substitutes for silica, alumina, andiron. These items are received at the plant by truck and rail. The following table containsexamples of non-hazardous raw material substitutes.Calcium agentsExamples of Non-Hazardous Raw Material SubstitutesLime slurry, drinking waterIndustrial lime, carbide slurryslurry, slurry thinnersSilica agentsUsed foundry sandMicro silicaIron agentsRoasted pyrites, red mud,converter dust, iron slag, steelslagSynthetic hematite, tin slagmill scaleFly ash slagFluidized bed ash, residuesfrom natural stone workingDesulphogypsumChemical gypsumSilica, alumina, calciumagentsGypsum agents (forcement)7

Ash Grove Cement CompanyPermit #: 0075-AOP-R16AFIN: 41 00001The following table contains examples of non-hazardous fuel substitutes.Examples of Non-Hazardous Raw Fuel SubstitutesSolidLiquidGaseousLandfill gasPyrolysisgasPaper wastesWastes from the paperindustryPetroleum cokeWood wastesTarRice chaffUsed oilOlive kernelsGlycerineGraphite dustCoconut shellsCharcoalPlastic residuesRubber residuesPaper plant manufacturewastePaper mill wastewatertreatment residualBattery casesActivated bentoniteUsed industrial sorbentsBiodiesel and ethanolProduction off-spec andHousehold refusewaste productsRefuse-derivedTallow, grease, renderingfuelwastesAutomobile “fluff” Distillation residuesPlastic fuel tanksWaste suspensionsOil-bearing soilAsphalt slurrySewage sludgeMeat and bonemealOil sludgeOil, gas & petroleumindustry wastes and tankdropoutsOil, gas &petroleum industrywastes and tankdropoutsThe preheater/precalciner (PH/PC) pyroprocessing system features a five-stage cyclone-typepreheater string, low-NOx precalciner (with a combustion chamber), and rotary kiln. The lowNOx PH/PC portion of the system is located in a tower adjacent to the kiln. The precalcinerallows the burning fuel to be intimately mixed with the kiln feed.There is no clinker cooler baghouse or stack. Instead, some of the pre-heated air from the clinkercooler (tertiary air) provides combustion air to the precalciner. The rest is used in the in-line rawmill to dry the kiln feed materials. Therefore, all of the air from the clinker cooler eventuallyflows through the main baghouse and stack.To further increase the energy efficiency of the system, hot exhaust gas from the preheater toweris used to dry coal in the coal mill. The gas then passes through a baghouse and then is vented tothe main stack.8

Ash Grove Cement CompanyPermit #: 0075-AOP-R16AFIN: 41 00001The raw material building from the decommissioned long dry kiln process has been converted tostore coal, petroleum coke, limestone, and gypsum. A new coal silo and coal mill has beenconstructed for the PH/PC kiln system. The equipment designated for handling, storing, andmilling coal is also used for petroleum coke and other similar alternate fuels. An emergencygenerator has been installed to power key process and environmental equipment during poweroutages.The exhaust gas from a kiln system is comprised of combustion by- products, cement kiln dust(CKD), alkali salts, carbon dioxide, water vapor, and excess air. The main exhaust gases exitfrom the top of the preheater tower and pass through the in-line raw mill and main air pollutioncontrol device (APCD) before being emitted through a single stack. Bypass gases exit the feedend of the rotary kiln prior to the precalciner and are conditioned by a separate bypass systemAPCD, then vented through the main kiln stack. The purpose of an alkali/chlorine bypass is toremove volatile salts and other impurities from the pyroprocessing system, thereby preventingtheir buildup in the kiln system and in the product. Low alkali product is critical since it isrequired for Arkansas Department of Transportation contracts.CKD is inherently generated as a by-product of the cement production process. CKD is finelyground and partially calcined raw feed that becomes entrained in the combustion gases due to thehigh velocity of the gas and the tumbling motion of the material in the kiln system. The particlesconsist of raw materials, partially calcined material (lime), and volatile inorganic salts (e.g.,sodium and potassium chloride and sodium and potassium sulfate). CKD is collected in the mainand bypass baghouses. The bypass CKD is pneumatically conveyed to storage silos, and thenremoved by truck for beneficial use or disposal. All CKD disposed on-site is wetted in a pug millprior to disposal. The dust collected in the main baghouse is reintroduced to the preheater toweras part of the kiln feed inlet stream. As an option, some of the dust from the main baghouse canbe transported from the kiln tank to the bypass baghouse, where it is removed from the system.The cooled clinker is processed in the clinker grinding system. The clinker grinding system iscomprised of two ball mills and a vertical cement mill, material bins and feeders, separators foreach mill including a high-efficiency separator for the vertical mill, dust collectors, and materialhandling equipment. The clinker is mixed with gypsum, chalk, and/or other additives, and thenground into portland cement. The finished product is conveyed into storage silos andsubsequently loaded into trucks and railcars for shipment to customers.9

Ash Grove Cement CompanyPermit #: 0075-AOP-R16AFIN: 41 00001RegulationsThe following table contains the regulations applicable to this permit.RegulationsArkansas Air Pollution Control Code, Regulation 18, effective June 18, 2010Regulations of the Arkansas Plan of Implementation for Air Pollution Control,Regulation 19, effective September 13, 2014Regulations of the Arkansas Operating Air Permit Program, Regulation 26, effectiveNovember 18, 201240 CFR Part 52.21, Regulations for the Prevention of Significant Deterioration of AirQuality40 CFR Part 60 Subpart F, Standards of Performance for Portland Cement Plants(Compliance with this subpart is demonstrated by compliance with NESHAPs SubpartLLL and Subpart EEE)40 CFR Part 60 Subpart Kb, Standards of Performance for Volatile Organic LiquidStorage Vessels(Including Petroleum Liquid Storage Vessels) for Which Construction,Reconstruction, or Modification commenced After July 23, 198440 CFR Part 60 Subpart Y, Standards of Performance for Coal Preparation Plants40 CFR Part 60 Subpart OOO, Standards of Performance for Nonmetallic MineralProcessing Plants40 CFR Part 60, Subpart IIII, New Source Performance Standards for StationaryCompression Ignition Internal Combustion Engines40 CFR Part 61, Subpart FF, National Emission Standards for Benzene Waste Operations40 CFR Part 63, Subpart G, National Emission Standards for Organic Hazardous AirPollutants from the Synthetic Organic Chemical Manufacturing Industry for ProcessVents, Storage Vessels, Transfer Operations, and Wastewater40 CFR Part 63, Subpart DD, National Emission Standards for Hazardous Air Pollutantsfrom Off-Site Waste and Recovery Operations40 CFR Part 63, Subpart XX, National Emissions Standards for Ethylene ManufacturingProcess Units: Heat Exchange Systems and Waste Operations40 CFR Part 63, Subpart LLL, National Emission Standards for Hazardous AirPollutants From the Portland Cement Manufacturing Industry40 CFR Part 63, Subpart EEE, National Emission Standards for Hazardous AirPollutants From Hazardous Waste Combustors10

Ash Grove Cement CompanyPermit #: 0075-AOP-R16AFIN: 41 00001Emission SummaryThe following table is a summary of emissions from the facility. This table, in itself, is not anenforceable condition of the permit.EMISSION SUMMARYEmission RatesSource NumberDescriptionPollutantTotal Allowable le*Allyl Chloride*Benzene*Bromoform*Bromomethane*Carbon disulfide*Carbon ne*Cumene*Diethanolamine*Ethyl Acrylate*Ethylbenzene*Ethylene Glycol*Iodomethane*Methyl Methacrylate*Methyl tert-butyl ether*Methylene chloride*11

Ash Grove Cement CompanyPermit #: 0075-AOP-R16AFIN: 41 00001EMISSION SUMMARYEmission RatesSource *trans-1,3-Dichloropropene*Vinyl acetate*Vinyl Bromide*Vinyl enol*Aniline*Benzidine*bis(2-Chloroethyl) ether*bis(2-Ethylhexyl) phthalate*Dimethyl enol*Phenol*Dioxin/Furan*12lb/hrtpy2.93E-71.3E-6

Ash Grove Cement CompanyPermit #: 0075-AOP-R16AFIN: 41 00001EMISSION SUMMARYEmission RatesSource 33Chute Transfer Point(326.DG20 to waste)Chute, Truck Loading ofCKDChute, CKD TruckLoadoutChute, Truck Loading ofCKDLoading Spout TransferPoint (443.CH56 tocollection bin451.XA970)Chute Transfer Point(443.SC40 to331.XA970)Chute Transfer Point(449.DM1 to 449.BC05)Chute Transfer Point(449.DM1 to 449.BC05)Chute Transfer Point(449.DM1 to 449.BC05)Chute Transfer Point(449.DM1 to 449.BC05)13