FerroalloyNESHAP--Crushing/screeningemissionfactorsJohnRegoto:ConradChin08/16/201204:46PMCc:ChuckFrench,Jeff.McKinney,RLunn,ImcafeeHistory:Thismessagehasbeenforwarded.1attachmentUpdatedEMICrusherEmissions.pdfConrad:AttachedareEMI’sresponsestothequestionsyouforwardedonAugust7,2012regardingtheestimatedcurrentemissionsfromcrushing/screeningoperations.Question1:‘YouappearedtoadjustthesecondarycrushingemissionfactorinTable11.24-2fromPMtoPM1ObyassumingthesameratioofPMtoPM1Ointheprimarycrushingfactor.Isthiscorrect?Doyouhaveanyreasontosuspectthattheactualnumbermightbehigherorlower,andwhy?”Response1:Yes,intheabsenceofaspecificPM1Ofactorintheset,EMIassumedthesameratio.EMIhasnoreasontosuspectadifference,eitherhigherorlower.Question2:“IfweweretoaddemissionfactorsfromtheCrushedStoneProcessingOperationstable11.19.2-2,itseemsthattherewouldbethepotentialtoaddoneormorefactorsforscreening,suchas0.0087foruncontrolled“screening.”Thereisalsoafactorfor“fines”screening,at0.072.Isthisequivalentto“secondaryscreening?Similarly,istheemissionfactorforconveyortransferpoint(0.00110)applicabletoanyoftheprocessesyoucurrentlyaddressusingamaterialhandlingfactorfromTable11.24-2?Arethereanyotherfactorsonthistablethatyouthinkmightbeappropriatetouse?”Response2:EMIbelievesthattheAP-42,Table11.19.2-2emissionfactorsfor“conveyortransfer”andfor“screening”couldbeappliedtoEMI’scrushing/screeningoperations.Infact,mostofthepointsinEMI’sJuly2,2012estimatewhereEMIusedtheTable11.24-2emissionfactorfor“materialhandlingandtransfer”areactuallyconveyortransferpoints.EMIdoesnothaveanyadditionalknowledgeregardingthebasisandscopeofTable11.19.2-2’semissionfactorfor“fines”screening.However,EMIdoesnotbelievethefactorwouldbeapplicabletoEMIsoperations,inanyevent,becauseEMIdoesnotengagein“secondaryscreening.”EachofthecrushersatEMI(primaryjawcrusherandsecondaryjawcrusher)hasadedicatedscreenbox(screen01andscreen02,respectively).Someproductpassesthroughboththeprimaryandsecondarycrusher,whileotherproductpassesthrougheithertheprimarycrusherorsecondarycrusheranditsdedicatedscreenboxalone.Theemissionsestimates,however,wereconservativelybasedontheassumptionthatallmaterialpassesthroughbothcrushersystems.Sincebothscreenbox01andscreenbox02havebeenincludedintheemissionsestimates(andthefinesfromtheprimaryscreenboxarenotsubjecttoanysecondaryscreening),thereisnoadditionalscreeningtobeaccountedfor.Question3:“Canyouindicateforeachcrushingandfugitiveprocess/emissionpoint,whichfactoryouthinkwouldbeappropriatetouse?”Response3:Attachedisanupdatedemissionsestimatethatindicatestheemissionfactorusedforeachemissionspoint.Pleaseletmeknowifyouhaveanyadditionalquestionsorwouldliketoscheduleacalltodiscussthismatterfurther.JohnJohnRego•Environmental,Health&Safety DAY.901LAKESIDEAVENUECLEVELAND,OHIO44114DIRECT216.586.7542•FAX216.579.0212.JREGO@JONESDAY.COMThise-mail(includinganyattachments)maycontaininformationthatisprivate,confidential,orprotectedbyattorney-clientorotherprivilege.Ifyoureceivedthise-mailinerror,pleasedeleteitfromyoursystemwithoutcopngitandnotifysenderbyreplye-mail,sothatourrecordscanbecorrected.

### Crushing and Sizing Emissions

‐ Eramet Marietta Plant Max Permitted Hours: 5,840

Product Max Hrs: 3504



### Uncontrolled Emissions Factors from AP

‐ 42 Table 11.24

‐ 2, Product Typ Op hrs: 3504



### and AP

‐ 42 Table 11.19.2

‐ 2 Slag Max Hrs: 2336

Slag Typ Op hrs: 2336

Type of unit Emission

Unit ID Capacity (tons

/ hour) * Emission

factor -

PM 10

(lb/ton) Potential

emissions

PM 10

(lb/hour) at

95%

ca p ture Total PM 10

Emissions

(tons/yr)



### Factor Notes



### Product

Primary Jaw Crusher Receiving P-917 140 5.5E-05 0.008 0.013 

### Stone, Conveyor Transfer, U/C

Primary Jaw Crusher (including Grizzly) P-917 140 0.0025 0.350 0.613 

### Metallic, Primary Crushing

Conveyor 1A Belt (at Primary Crusher) P-917 140 0.0030 0.420 0.736 

### Metallic, Material Handling

Screening 01 Receiving (from #1A Belt) P-917 140 5.5E-05 0.008 0.013 

### Stone, Conveyor Transfer, U/C

Screening 01 P-917 140 4.35E-04 0.061 0.107 

### Stone, Screening

Screen 01 to #2 Belt

‐ Out of Service (OOS) P-917 0 5.5E-05 0.000 0 

### Stone, Conveyor Transfer, U/C

Secondary Jaw Crusher Receiving P-917 140 5.5E-05 0.008 0.01 

### Stone, Conveyor Transfer, U/C

Secondary Jaw Crusher P-917 140 0.0060 0.840 1.472 

### Metallic, Secondary Crushing

(ratio from PM

‐ PM10)

#7 Belt Receiving "A" (at ground level) P-917 140 5.5E-05 0.008 0.013 

### Stone, Conveyor Transfer, U/C

#7 Belt Receiving "B" (at second level) P-917 140 5.5E-05 0.008 0.013 

### Stone, Conveyor Transfer, U/C

Screen 02 Receiving (at end of #7 Belt) P-917 140 5.5E-05 0.008 0.013 

### Stone, Conveyor Transfer, U/C

Screen 02 P-917 140 4.35E-04 0.061 0.107 

### Stone, Screening

#5 Belt Receiving (fines) P-917 140 5.5E-05 0.008 0.013 

### Stone, Conveyor Transfer, U/C

#4 Belt Receiving (2"x1/4") P-917 140 5.5E-05 0.008 0.013 

### Stone, Conveyor Transfer, U/C

#3 Belt Receiving (3"x1") P-917 140 5.5E-05 0.008 0.013 

### Stone, Conveyor Transfer, U/C

Fines Bin 01 (from #5 Belt) P-917 140 5.5E-05 0.008 0.013 

### Stone, Conveyor Transfer, U/C

Product Bin 02 (from #4 Belt) P-917 140 5.5E-05 0.008 0.013 

### Stone, Conveyor Transfer, U/C

Product Bin 03 (from #3 Belt) P-917 140 5.5E-05 0.008 0.013 

### Stone, Conveyor Transfer, U/C

Product Bin 04 (from #2 Belt

‐ NOT USED) P-917 0 5.5E-05 0.000 0 

### Stone, Conveyor Transfer, U/C



### SLAG

Main Jaw Crusher Receiving (slag only) P-917 140 5.5E-05 0.008 0.009 

### Stone, Conveyor Transfer, U/C

Main Jaw Crusher (slag only) P-917 140 0.00250 0.350 0.409 

### Metallic, Primary Crushing

#1A Belt Receiving (slag only) P-917 140 5.5E-05 0.008 0.009 

### Stone, Conveyor Transfer, U/C

#1 Belt Receiving (slag only) P-917 140 5.5E-05 0.008 0.009 

### Stone, Conveyor Transfer, U/C

Slag Bin 05 (from #1 Belt) P-917 140 5.5E-05 0.008 0.009 

### Stone, Conveyor Transfer, U/C

Total Controlled Emissions, tpy Total PM 10

Emissions

(tons/yr) 3.6

Total Mn

Emissions

( tons/ y r ) *** 

### 1.476

* Average annual capacity estimated to be 140 tons per hour.

** Crushing and sizing emissions capture effiency of hoods is enhanced due to high bulk density of

product (nominal 270 lbs/ft3) along with material wetting (when necessary).

*** Total Manganese emissions based on 41% of total PM10 emissions. TOTAL CONTROLLED EMISSIONS **

(Capture efficiency of 95% of PM10 at all pick-up points)