AmythisisasummaryofthemodificationsCrodarequeststoPermitAQM-003!00426-Renewal2.PleasecontactmeIfthereareanyquestions.•DeleteCondition3—TableIa.fromthepermitCrodaisintheprocessofdemolishingBoiler#1.•ConditionIa.Page4theEmissionUnitDescriptionforEU3&4shouldread“BlendTankArea—TwoBlendTanks•ConditionIa.Page4theEmissionUnitDescriptionforEU14shouldincludethe3Aautoclavehotwell.•ConditionIa.Page4theEmissionUnitDescriptionforEU31throughEU35shouldreadUnloadlngStationTanks”.•ConditionIa.Page4theEmissionUnitsforMPIEU18&19shouldrefertoathirdvacuumpump.PerhapsMPIEU2(LNotethereisadiscrepancybetweenthedesignationoftheemissionpointsinthetableonpage4andhowthepointsaredescribedonpage51Condition3—TableIk.•Condition3TableIa.2.vi.B.Page20shouldrefertoCondition3-TableI(o)4jnotTable1(o)(3)aswritten.•Condition3TableIb.2.vii.APage24shouldrefertoCondition3-Table1(o)4)notTable1(oX3)aswritten.•Condition3TableIc.2.vui:A.Page27shouldrefertoCondItion3-Table1(o)L4LnotTable1(o)(3)aswritten.CondItion3TableIh.I.iv.D.jPage43shouldread“Thepressuredropacrossthescrubbershallbelessthan19inches.watergauge.”•DeleteCondition3TableILI.vi.C.Page.46.Thespraycondenseron7kettleoperatesatatmosphericconditionswithnopackingorothermeansofcreatingapressuredropsomonitoringofpressuredropisnotameaningfulmeasureofItsoperation..•DeleteCondition3Table1j.1.vi.C.Page49.Thespraycondenseron4kettlealsooperatesatatmosphericconditionswithnopackingorothermeansofcreatingapressuredropsomonitoringofpressuredropisnotameaningfulmeasureofitsoperation.‘Condition3TableII.1.1.8.Page55pleasedeleteMulti-PurposePlantandinsertUnloadingStationTanks.•Condition3TableImI.vi.C.Page56pleasedeletethewords“...andkettles.”Theoxidedetectionsystemdoesnotinvolvethekettles.•ConditIon3Appendix“KPage73Multi-PurposePlantinsignificantsources.ThefirstitemshouldreadThreevacuumpumps.inaddition,CrodarequeststhattheGeneralEmissionLimitationfromAPC-2004/0723forOxidesofSulfurnottoexceed0.1tonper12-monthrollingperiodbetransferredtoAQM-003/00426—Renewal2.Inaddition,CrodarequeststhattheEmissionLimitationfromAPC-200410723forCarbonMonoxideof34.0poundsperbatchforthe‘KettlesArea’betransferredtoAQM-003!00426—Renewal2andwhitewerequest34.0poundsperbatchberetainedfor7kettletheemissionthelimitationfor4kettlemaybereducedto30.0poundsperbatch.Amy this isa summary of the modifications Croda requests to Permit AQM-003100426- Renewal 2. Please

contact me if there are any questions.

• Delete Condition 3—Table I a. from the permit Croda is in the process of

demolishing Boiler #1.

• Condition I a. Page 4 the Emission Unit Description for EU 3 & 4 should read Blend

Tank Area— jQ Blend Tanks,....

• Condition I a. Page 4 the Emission Unit Description for EU 14 should include the 3A

autoclave hotwelL

• Condition I a. Page 4 the Emission Unit Description for EU 31 through EU 35 should

read ‘Unloading Station Tanks.

• Condition 1 a. Page 4 the Emission Units for MPI EU 18 & 19 should refer to a third

vacuum pump. Perhaps MPI EU 20. Note there is a discrepancy between the

designation of the emission points in the table on page 4 and how the points are

described on page 51 Condition 3—Table I k.

• Gonditlon 3 Table I a. 2. vi. B. Page 20 should refer to ConditionS- Table 1oLnot

Table 1(o)(3) as written.

• Condition 3 Table I b. 2. vii. A. Page 24 should refer to ConditIon 3- Table I(o){4)not

Table 1(oX3) as written.• Condition 3 Table I C. 2. vii; A. Page 27 should refer to Condition 3- Table 1(o)(4not

Table 1(o)(3) as written.

• Condition 3 Table I h. 1. iv. D. j, Page 43 should read ‘The pressure drop across the

scrubber shall be less than 19 inches water gauge.

• Delete Condition 3 Table I I. 1. vi. C. Page 46. The spray condenser on 7 kettle

operates at atmospheric conditions with no packing or other means of creating a

pressure drop so monitoring of pressure drop is not a meaningful measure of its

operation.

• Delete Condition 3 Table I j. 1. vi. C. Page 49. The spray condenser on 4 kettle also

operates at atmospheric conditions with no packing or other means of creating a

pressure drop so monitoring of pressure drop is not a meaningful measure of its

operation.

• Condition 3 Table I I. I. I. B. Page 55 please delete Multi-Purpose Plant and insert

Unloading Station Tanks.

• Condition 3 Table I m.1.vi.C. Page 56 please delete the words “...and kettles.” The

oxide detection system does not involve the kettles.

• Condition 3 Appendix “A” Page 73 MuItiPurpose Plant insignificant sources. The first

item should read Three vacuum pumps.

In addition, Croda requests that the General Emission Limitation from APC-2004/0723 for Oxides of Sulfur riot

to exceed 0.1 ton per 12-month rolling period be transferred to AQM-003100426— Renewal 2.

In addition, Croda requests that the Emission Limitation from APC-2004/0723 for Carbon Monoxide of 34.0

pounds per batch for the ‘Kettles Area’ be transferred to AQM-003/00426— Renewal 2 and whilewe

request 34.0 pounds per batch be retained for 7 kettle the emission the limitation for 4 kettle may be

reduced to 30.0 pounds per batch.2Aj

a March

2, 2010 DuPont Stine-Haskell

Research

Center P.O.

Box 80249 Wilmington,

DE 19880-0249 Attention:

Robert

F. Oranzi Manager, Environmental

Services SUBJECT:

Cancellation

of Facility

Air Permits: APC-82f 068-Operation

(Al’)- Boiler

No.

3 APC-82/094-Operation

(Al’)- Boiler

No.

4 Dear.

Mr. Oranzi: The Department

accepts

the cancellation

request

dated February

24, 2010

as formal notification

to cancel

the following

Permits,

related

to DuPont

Stine Haskell Research

Center

facility,

located

at 1090 Elkton

Rd. Newark, DE 19714: Permit: APC-82/068-Operation

(Al’)- Boiler

No.

3‘ Permit: APC-82/094-Operátion

(Al’)- Boiler

No.

4 Operation

of this equipment

after

the date ofthis

letter

shall constitute

a violation

of

7 DE Admin.

Code

1100. These

two permits

will

be deleted

from

the Title

V Permit Renewal: AOM-003!00279(Renewal

2’). Please contact

Lupe Reynolds

at (302) 323-4542

if you have

any questions

or concerns. Sincerely, Paul

E. Foster,

P.E. Program

Manager Engineering

& Compliance

Branch PEF:ELD:GJR:gjr F:\EngAndCompliance\GJR\GJR10028.doc pc:

Dover

File

Jack Sipple John Outten

Frank

GaoMEMORANDUMTO:PaulBFoster,P.E.ThROUGH:Everett1.DeWhitt,PhD.FROM:LupeReynoldsSUBJECT:CancellationofFacilityAirPermits:APC-82/068-Oneration(Al)-BoilerNo.3APC-82/094-Operation(Al)-BoilerNo.4DATE:March1,2010BACKGROUNDOnFebruary26,theDepartmentreceivedaletterfromDuPontStifleHaskellResearchCenter,signedbyRobertF.Oranzi,EnvironmentalManager,indicatingthatBoilersNo.3andNo.4areinoperableandbeyondrepair.Therefore,theCompanyrequestedtocanceltheoperatingpermitorthesetwoboilers:Permit:APC-82/068-Operation(Al)-BoilerNo.3Permit:APC-82/094-Oi,eratioh(Al)-BoilerNo.4RECOMMENDATIONIrecommendsendingtheattachedlettertotheCompany,confirmingthattheDepartmentiscancellingthetwopermitsrelatedtoBoilersNo.3andNo.4anddeletingthemfromTitleVPermitRenewal:AOM003/00279(Renewal2).PEF:ELD:GJR:gjrF:\EngAndCompliance\GJR\G3R10028.docpc:DoverFileJackSippleFrankGaoKarenMattioDawnMinorJoannaFrenchJohnOutteni’AJ

a March

2, 2010 DuPont Stine-Haskell

Research

Center P.O.

Box 80249 Wilmington,

DE 19880-0249 Attention:

Robert

F. Oranzi Manager, Environmental

Services SUBJECT:

Cancellation

of Facility

Air Permits: APC-82/068-Operation

(Al)- Boiler

No.

3 APC-82/094-Operation

(Al)- Boiler

No.

4 Dear.

Mr. Oranzi: The Department

accepts

the cancellation

request

dated February

24, 2010

as formal notification

to cancel

the following

Permits,

related

to DuPont

Stifle Haskell Research

Center

facility,

located

at 1090 Elkton

Rd. Newark, DE 19714: Permit: APC-82/068-Oaeration

(Al)- Boiler

No.

3 Permit: APC-82/094-Operàtion

(Al)- Boiler

No.

4 Operation

of this equipment

after

the date ofthis

letter

shall constitute

a violation

of

7 DE Admin.

Code

1100. These

two permits

will

be deleted

from

the Title

V Permit Renewal: AOM-003100279(Renewal

2). Please contact

Lupe Reynolds

at (302) 323-4542

if you have

any questions

or concerns. Sincerely, Paul

E. Foster,

P.E. Program

Manager Engineering

& Compliance

Branch PEF:ELD:GJR:gjr F:\EngAndCompliance\G)R\GJR10028.doc pc:

Dover

File

Jack Sipple John Outten

Frank

GaoMEMORANDUMTO:PaulE.Foster,P.E.ThROUGH:EverettL.DeWhitt,PhD.FROM:LupeReynoldsSUBJECT:CancellationofFacilityAirPermits:APC-82/O68-Oeration(Al)-BoilerNo.3APC-82/094-Operation(Al)-BoilerNo.4DATE:March1,2010BACKGROUNDOnFebruary26,theDepartmentreceivedaletterfromDuPontStineHaskellResearchCenter,signedbyRobertF.Oranzi,EnvironmentalManager,indicatingthatBoilersNo.3andNo.4areinoperableandbeyondrepair.Therefore,theCompanyrequestedtocanceltheoperatingpermitorthesetwoboilers:Permit:APC-821068-Operation(Al)-BoilerNo.3Permit:APC-82!094-Oneratioñ(Al)-BoilerNo.4RECOMMENDATIONIrecommendsendingtheattachedlettertotheCompany,confirmingthattheDepartmentiscancellingthetwopermitsrelatedtoBoilersNo.3andNo.4anddéleUngthemfromTitleVPermitRenewal:AOM003100279(Renewal2’).PEF:ELD:G)R:gjrF:\EngAndCompliance\GJR\GJR10028.docpc:DoverFileJackSippleFrankGaoKarenMattloDawnMinorJoannaFrenchJohnOuttenj2gAj

a March

2, 2010 DuPont Stine-Haskell

Research

Center P.O. Box80249 Wilmington,

DE 19880-0249 Attention:

Robert

F. Oranzi Manager, Environmental

Services SUBJECT:

Cancellation

of Facility

Air Permits: APC-82/068-Operation

(Al)- Boiler

No.

3 APC-82/094-Operation

(Al)- Boiler

No.

4 Dear.

Mr. Oranzi: The Department

accepts

the cancellation

request

dated February

24, 2010

as formal notification

to cancel

the following

Permits,

related

to DuPont

Stifle Haskell Research

Center

facility,

located

at 1090 Elkton

Rd. Newark, DE 19714: Permit: APC-82/068-Operation

(Al)- Boiler

No.

3 Permit: APC-82I094-Operátion

(Al)- Boiler

No.

4 Operation

of this equipment

after

the date

of this letter

shall constitute

a violation

of

7 DE Admin

Code

1100. These

two permits

will

be deleted

from

the Title

V Permit Renewal: AQM-003!00279(Renewal

2). Please contact

Lupe Reynolds

at (302) 323-4542

if you have

any questions

or concerns. Sincerely, Paul

E. Foster,

P.E. Program

Manager Engineering

& Compliance

Branch PEF:ELD:GJR:gjr F:\EngAndCompliance\GJR\GJR10028.doc pc:

Dover

File

Jack Spple John Outten

Frank

GaoMEMORANDUMTO:PaulE.Foster,P.E.ThROUGH:EverettL.DeWhitt,PhD.FROM:LupeReynoldsSUBJECT:CancellationofFacilityAirPermits:APC-82/068-Operation(Al)-BoilerNo.3APC-82/094-Operation(Al)-BoilerNo.4DATE:March1,2010BACKGROUNDOnFebruary26,theDepartmentreceivedaletterfromDuPontStifleHaskellResearchCenter,signedbyRobertF.Oranzi,EnvironmentalManager,indicatingthatBoilersNo.3andNo.4areinoperableandbeyondrepair.Therefore,theCompanyrequestedtocanceltheoperatingpermitorthesetwoboilers:Permit:APC-82/068-Operation(Al)-BoilerNo.3Permit:APC-82J094-Operatioñ(Al)-BoilerNo.4RECOMMENDATIONIrecommendsendingtheattachedlettertotheCompany,confirmingthattheDepartmentiscancellingthetwopermitsrelatedtoBoilersNo.3andNo.4anddeletingthemfromTitleVPermitRenewal:AOM003/00279(Renewal2).PEF:ELD:GJR:gjrF:\EngAndCompliance\GJR\G3R10028.docpc:DoverFileJackSippleFrankGaoKarenMattioDawnMinorJoannaFrenchJohnOuttenPeiiizL

‘1March12,2010INVISTAS.àr.l.-SeafordPlant(INVISTA)25876DuPontRoadSeaford,DE19973ATTENTION:StevenR.KimptonPlantManagerSUBJECT:CancellationofPermitsassociatedwithEmissionUnitspermanentiyshutdownDearMr.Kimpton:TheDepartmentacceptsthecancellationrequestsdatedDecember31,2009andFebruary23,2010asformalnotificationtocancelallthepermitsidentifiedintheAttachmentbelow.ThelistedpermitswhichallowfortheoperationoftheemissionunitsdescribedintheAttachmentareherebycancelledduetothepermanentshutdownoftheassociatedemissionunitslocatedat25876DuPontRoad,Seaford,Delaware.Operationoftheseemissionunitsafterthedateofthislettershallconstituteaviolationof7DEAdmin.Code1100.PleasecontactPhanuelC.K.Bediako,Ph.D.at(302)739-9402ifyouhaveanyquestionsorconcerns.Sincerely,PaulE.Foster,P.E.ProgramManagerEngineering&ComplianceBranchPEF:JLF:PCKB:srf:\pckb\pckblOO27.docpc:Dover(TitleV)FileJoannaL.French,P.E.PhanuelC.K.Bediako,Ph.D.JackSippleFrankGaoJohnOuttenINVISTA-SeafordPlantMarch12,2010Page2ATrACHMENT:LISTOFCANCELLEDPERMITSPERMITNUMBEREQUIPMENTDESCRIPTIONAPC-83/071-OPERATION(Amendment5)(NOxRACT)231MMBTU/hrCombustionEngineeringBoilerdatedOctober3,2002(EU002)APC-82/035-OPERATIONdatedAugust28,1981CoalCarThawingUnit(EU006)APC-88/268-OPERATIONdatedJuly15,198818MMBTU/hrDOWTHERMVaporizer(EU011)APC-88/270-OPERATIONdatedJuly15,198818MMBTU/hrDOWTHERMVaporizer(EU013)APC-88/271-OPERATIONdatedJuly15,198818MMBTU/hrDOWTHERMVaporizer(EU014)APC-88/272-OPERATIONdatedJuly15,198818MMBTU/hrDOWTHERMVaporizer(EU015)APC-88/273-OPERATIONdatedJuly15,198824MMBTU/hrDOWThERMVaporizer(EU016)APC-88/274-OPERATIONdatedJuly15,198846.4MMBTU/hrDOWTHERMVaporizer(EU017)APC-88/275-OPERATIONdatedJuly15,198846.4MMBTU/hrDOWTHERMVaporizer(EU018)APC-80/1406-OPERATIONdatedSeptember17,1980LindbergReclamationUnit’(Electric)(EU021)•APC-80/1407-OPERATIONdatedSeptember17,11980LindbergReclamationUnit(Electric)(EU022)APC-80/1321-OPERATION(Amendment1)datedRefluxRecoveryColumnonCPlineIIIMay12,1982ContinuousPolymerizationProcesses(EU025A)APC-82/1189-OPERATIONdatedOctober10,1982TwopolymerizersandscrubbingmachinesNo.21andNo.22(EU025A)APC-0th/0302-OPERATIONdatedApril5,2004NorthScrubberSystem(EU025B)APC-2001/0303-OPERATIONdatedApril5,2004SouthScrubberSystem(EU025B)APC-2002/0741-OPERATIONdatedApril5,2004MiddleScrubberSystem(EU0258)APC-94/0853-CONSTRUCTION/OPERATIONdatedDOWTHERMVentCondensers(EU026)November8,1996APC-2005/0179-CONSTRUCTION/OPERATIONdatedFour(4)AdipicAcidVacuumConveyanceSystemsOctober5,2005(EU036)APC-2005/0180-CONSTRUCTION/OPERATIONdatedOctober5,2005APC-2005/0181-CONSTRUCTION/OPERATIONdatedOctober5,2005APC-2005/0182-CONSTRUCTION/OPERATIONdatedOctober5,2005MEMORANDUM TO:

Paul

E. Foster,

P.E. THROUGH:

Joanna

L. French,

RE. FROM:

Phanuel

C.

K. Bediako,

Ph.D.SUBJECT:CancellationofPermitsINVISTA-SeafordPlant DATE:

March

2, 2010BACKGROUNDINFORMATION: The Departmentreceived

a letter

dated December

31, 2009

and

a supplementary

letter

dated February

23, 2010

in which INVISTA requested

an administrative

amendment

to the Title

V permit. According

to the letter, several operations

have

been permanently

shut down

as

a result

of the restructuring.

The major

thrust

of this restructuring

was

the shutdown

of

all batch

and continuous

Nylon polymerization

processes. Furthermore,

Bulk Continuous

Filament

(BCF) spinning operations

have

been discontinued.

One (231) MMBTU/hr Combustion

Engineering

coal-fired

boiler

(Boiler

No.

2) was permanently

shut down

as

a result

of the July

28, 2009 Consent

Decree between

the EPA,

the Department of Justice,

DNREC,

andINVISTA. The Company

requested

that

the emission

units which

have

been permanently

shut down

be deleted

from theTitle

V permit

and

the associated

7DEAdmin.Code

1102 permits

be cancelled.

The Table identifies all the permits

which

are

to

be cancelled.LISTOFPERMITSTOBECANCELLEDPERMITNUMBEREQUIPMENTDESCRIPTION APC-83/071-OPERATION

(Amendment5)(NOxRACT)231 MMBTU/hr Combustion

Engineering

Boiler dated October

3, 2002

(EU

002) APC-82/035-OPERATION

dated August

28,

1981

Coal

Car Thawing

Unit

(EU

006) APC-88/268-OPERATION

dated

July

15, 1988

18 MMBTU/hr DOWTHERM

Vaporizer (EU 011) APC-88/270-OPERATION

dated

July

15, 1988

18 MMBTU/hr DOWTHERM

Vaporizer (EU 013) APC-88/271-OPERATION

dated

July

15, 1988

18MMBTU/hrDOWTHERMVaporizer (EU 014) APC-88/272-OPERATION

dated

July

15, 1988

18 MMBTU/hr DOWTHERM

Vaporizer (EU

015) APC-88/273-OPERATION

dated

July

15, 1988

24 MMBTU/hr DOWTHERM

Vaporizer (EU 016) APC-88/274-OPERATION

dated

July

15, 1988

46.4 MMBTU/hr DOWTHERM

Vaporizer

(EU 017) APC-88/ 275-OPERATION

dated

July

15, 1988

46.4 MMBTU/hr DOWTHERM

Vaporizer

(EU

018) APC-80/1406-OPERATION

dated September

17, 1980

Lindberg Reclamation

Unit (Electric) (EU 021) APC-80/1407-OPERATION

dated September

17, 1980

Undberg Reclamation

Unit (Electric) (EU 022) APC-80/ 1321-OPERATION

(Amendment

1) dated

Reflux Recovery

Column

on

CP Line

III May

12, 1982

Continuous Polymerization

Processes (EU 025A)MEMORANDUMINVISTA-SeafordPlantMarch2,2010Page2LISTOFPERMITSTOBECANCELLEDPERMITNUMBEREQUIPMENTDESCRIPTIONAPC-82/1189-OPERATIONdatedOctober10,1982TwopolymerizersandscrubbingmachinesNo.21andNo.22(EU025A)APC-2001/0302-OPElATIONdatedApril5,2004NorthScrubberSystem(EU0258)APC-2001/0303-OPERATIONdatedApril5,2004SouthScrubberSystem(EU025B)APC-2002/0741-OPERATIONdatedApril5,2004MiddleScrubberSystem(EU025B)APC-94/0853-CONSTRUCTION/OPERATIONdatedDOWTHERMVentCondensers(EU026)November8,1996APC-2005/0179-CONSTRUCTION/OPERATIONdatedFour(4)AdipicAcidVacuumConveyanceSystemsOctober5,2005(EU036)APC-2005/0180-CONSTRUCTION/OPERATIONdatedOctober5,2005APC-2005/0181-CONSTRUCTION/OPERATIONdatedOctober5,2005APC-2005/0182-CONSTRUCTION/OPERATIONdatedOctober5,2005RECOMMENDATION:Irecommendthatthepermitsidentifiedabovebecancelled.PEF:.]LF:PCKB:srf:\pckb\pckblOO27.clocpc:Dover(TitleV)FileJackSippleFrankGaoKarenMattio,P.E.DawnMinorJoannaFrench,P.E.JohnOutten