STATE OF DELAWARE DEPARTMENT OF NATURAL RESOURCES AND ENVIRONMENTAL CONTROL
OFFICE OF T H E 89 K I NGS HI G H WAY P HONE : ( 302 ) 739-9000 FAX: ( 302 ) 739 - 6242 SECRETARY DOVER, DELAWARE 19901

June 10 , 20 10

Mr. Shawn M. Garvin 

### (3RAOO) Regional Administrator U.S

. EPA Region III 1650 Arch Street Philadelphia , PA 19103
Dear Mr. Garvin:
On June 15 ,2009, th e Department of Natural Resources and Environmental Control (DNREC) s ubmitted to EPA for approval 

### a revision to the Delaware State Implementation Plan (SIP). The rev i s ion consisted of administrative and non-substantive changes to 36 Delaware air quality regulations which EPA previo usly approved and incorporated into the Delaware SIP.
We hav e s ub seq uently determined that the Jun e 2009 SIP revision inadvertentl y includ ed
s om e se ct ion s whic h are not p art of th e Delaware SIP. Accord in g ly , we are re qu es tin g that t ho s e sect ions b e w ithdrawn from the .Jun e 1 5 , 2009 SIP revision subm itt al , name ly:

• Regu lation 1101 Defi ni t i ons and Adm inistrative Pri n c ip les , Sec ti on 2.0 Definit io ns, s pecifically th e terms li sted in the enclosure to this lette r.

• Re g ulation 1103 , Ambient Air Quality Standards , Section 7 .0 Hydrocarbon s, and S ection 9.0 Hydrogen Sulfide.

• Regulation 110 7 Particulate Em i s s ion s from Incineration, Section 2.0 Restriction s
.

• Reg u latio n 1109 E mi ss ion s o f S u lfur Co mp o und s from Indu s tr ia l O p e rat ions, Sec tion 2. 0 Restr i ct io ns o n S ulfuri c Manufacturin g Operat ions, p aragra ph 2.2 Co n tro l of s ulfuri c ac id mi s t.

• Re g ulation 1 146 Elec tric Gen erating Unit (EGU) Mu l ti-Pollutant Regul a tion , tho se portion s ofM r. Sh a\VB M. Garvi n June 10 ,20 10 Pa ge 2

• Section s 1.0 , 2.0,3. 0 , 7.0, 8.0 9 .0 which gove rn co ntro l of mercury em iss ion s, and of all of Sec tion 6.0 , and Tabl e 6-1.
I f yo u or yo ur staff ha ve a n y question re g ardin g thi s requ es t , ple ase do not hes itate to contact Ali Mirzakha lili , Program Admini s trator ofDNREC's Air Q u ality Manag e ment Section at 3 02-7 39-9 40 2.

CC: Ali Mirzakhalili David Arnold

E nclo sureEnclosure
Terms in Delaware Regulation 1101 Definitions and Administrative Principles, Section 2.0 Definitions for Which Delaware is Not Requesting SIP Approval


### "Active section of disposal site" "Adequately wetted" "Alternative method" "Asbestos" "Asbestos containing waste material" "Asbestos material" "Asbestos mill" "Asbestos tailings" "Asphalt concrete plant" "Beryllium" "Beryllium alloy" "Beryllium containing waste" "Beryllium ore" "Capital expenditure" "Ceramic plant" "Coal refuse" "Commercial asbestos" "Compliance schedule" "Condenser stack gases" "Control device asbestos waste" "Custody transfer" "Day" 

### "Demolition": "Denuder" "Drilling anc! production facility" "Enlcrgency renovation": "End box" 

### "End box ventilation systcm" "Equivalcnt method" "Etiologic agents" "Existing installation, equipment, source or operation" (As this definition applies to 7 DE Admin. Code 1120, New Sourcc Performance Standards) "Extraction plant". "Fabricating"

### "Floating roof' "Fossil fuel" '''Foundry'' 

### "Friable asbestos material" "Hourly period": See "One hour period". "Inactive section of disposal site" "Infectious waste" "Isokinetic sampling" "Large incinerator" "Machine shop" "Malfunction" "Manufacturing" 

### "Mercury" "Mercury chlor-alkali cell" "Mercury chi or-alkali electrolyzer" "Mercury ore" "Mercury ore processing facility" "Monitoring device" "Nitric acid production unit" "Noninfectious" "Odor" 

### "One hour period" "Paint application transfer efficiency" "Particulate asbestos material". "Planned renovation": "Proportional sampling" "Reference method" 

### "Rernoving" "Renovation" "Roadways" "Run" 

### "Sludge" "Sludge dryer" "Small incinerator" "Solid waste" "Standard" "Stationary vessel" "Stripping" "Waste oil" "Weak nitric acid"