### Bird, Patrick From: Sent : To: 

### Cc : Subject : Hi Pat, Kennedy , Eric < E ric
. Kennedy@maine
. gov> Friday , April 08 , 2016 4 :02 PM Bird , Patrick Crawford , Jeff S ; Graham , Tom ; Ostrowski , Kevin ; G ilbe rt , Ja ne ; Cone , Marc A RE : Growth Analysis in Maine's SIP Approved Chapter 115

Thanks for consulting with us about this
. After checking with folks here , we agree with you that it i s app ropriate to rem ove the existing SI P language referenced below and add the c urrent version of the 

### "Growth Analysis" l anguage contained in Chapter 115 and a lso referenced below
. Let us know if you have any other questions
. Have a good weekend ! Eric 

### Eric K ennedy, P.E . Director, Division of Licensing and Compliance Bureau of Air Quality Ma ine Department of Envi ronmen t al Prot ection 207-287-5412 er ic .kennedy @m a i ne . gov From: Bird , Patrick [mailto:Bird.Patric k@epa.gov] 

### Sent: Wednesday, Apri l 06, 2016 1 0:27 AM To: Kennedy, Eric 

### Cc : Cra wford , Jeff S Subject : Growth An alysis in Ma i ne's SIP Approved Chapter 115 H i Eric , Thanks for taking my call earlier. We're trying to be clear as possible in our upcom i ng PSD SIP act i on { PM2
. 5 action , with some additional PSD - related items) and reduce an y potential redundancies in the Maine SIP. With that in mind, I noticed a new provis i on being added to the SIP at Chapter 115 entit l ed 

### " Growth Analysis " (found at 115(4}{A}{4}{h}) reads very c l osely to a provision in the existing Maine SIP
. In the new provision Maine essentially adds the baseline concentration dates for each pollutant that may require an increment determination , whereas the old provision keys 

### off of a 1977 date (which is actually how our PSD ru les read , but I think your versi o n is more instr uctive). 

### Maine ' s current versio n 

### "Growt h Analysis " (found at 1 15(4)(A)(4)(h) (h) Growth Ana lysis
. The ai r qual ity impacts and the nature and extent of emissions from all gen eral, commercial , res idential , industrial , and other growth in the area affected by the Major Modification or the new maj or s ource licens e, including associated mobile source s, which has occurred s ince Augu st 7 , l977 for su lfur dioxide ( SOz) and PM IO • s ince February 8 , 1988 for Oz , and since October Z O, ZO I0 fo r PM2.5 purs uant to S ection 7 of thi s Chapter. The growth anal ys is s hall be performed only fo r those pollutants ( SOz. PM IO· PM2
. 5 and/or Oz) fo r which the modification or new so urce was dete rm ined as major
. 

### Maine's SIP approved version (found at l SS(III)(B)(S) https: //www3 .epa.gov /region l /topics / air /s ips/me/2003 ME ch 115 .pdf 15
. The air quality impacts and the nature and extent of em i ssions from all general commerc i al , res i dent i a l, industri al , and other growth, inc l ud i ng associated mobile sources , which has occurred s i nce August 7, 1977 , in the area the source or modification would affect
. I am wondering if you would concur that the appropriate action would be to remove the existing SIP language (mark it as "reserved") and add the " Growt h Analysis" provision inline beneath it
. Thanks, Pat Patrick Bird U.S. EPA - Region 1 5 Post Office Square, OEPOS-2 Boston , MA 02109-3912 Phone:617-918-1287 Fax: 617-918-0287 Email: bird.patr i ck@epa.gov

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