### Updated September 2, 2011 page 1

**EGU Controls; Atlanta Nonattainment Area** Prepared b y B. Pearce **NOx Control** : Selective Cataly tic Reduction (SCR), VI STAS removal efficiency = 82.5 % (VI STAS 2012 Projection Emission Inventory , MACTEC) **SO2 Control** : Flue Gas Desulfurization (FGD), require d removal efficiency per (uuu) = 95 %, VISTAS removal efficiency = 95 % (VI STAS 2012 Projection Emission Inventory , MACTEC). **PM Control** : ESPs began operation prior to 2007. The PM2.5 control factor due to FGD was assumed to be 50% according to Table 5.4
- 1 on page 5.4
- 24 of EPA document "Stationary Source Control Techniques Document for Fine Particulate Matter" (EC/R Incorporated, 1998). **Control Order (Upstream to Downstream):** SCR, ESP, FGD Attainment Year (Base Year) for Atlanta Maintenance Plan Emi ssions Inventories is 2008 [note: attainment year for other nonattainment areas is different]

### Updated September 2, 2011 page 2 **EGU Control Dates: Atlanta PM2.5 NAA Plant/Unit**  **County NOx Control**  **Operation (SCR) NOx Control**  **(SCR) required by**  **rule (sss) 1**  **SO2 Control**

**Operation (FGD)**  **SO2 Control** 

**(FGD) required by**  **rule (sss) Other** 

**Controls Comments** 

Bowen 1 Bartow 2001(ozone season oper.) 6/1/10 6/1/10 6/1/10 LNB/OFA ESP Bowen 2 Bartow 2001(ozone season oper.) 6/1/09 5/1/09 6/1/09 LNB/OFA ESP Bowen 3 Bartow 2002 (ozone season oper.) 12/31/08 5/1/08 12/31/08 LNB/OFA ESP Bowen 4 Bartow 2002 (ozone season oper.) 12/31/08 12/1/08 12/31/08 LNB/OFA ESP
Branch 1 Putnam 12/31/13 12/31/13 LNB ESP GA Power has filed request to

GA PSC to shut down Unit 1 in 2013 2 Branch 2 Putnam 12/31/13 12/31/13 LNB ESP GA Power has filed request to

GA PSC to shut down Unit 2 in 2013 2 Branch 3 Putnam 6/1/15 6/1/15 LNB ESP Branch 4 Putnam 6/1/15 6/1/15 LNB ESP McDonough 1 Cobb 4/30/12 3 4/30/12 3 LNB/OFA, ESP Will replace with one gas
- fired

generating block in 2012 Q2 McDonough 2 Cobb 12/31/11 3 12/31/11 3 LNB/OFA, ESP Will replace with two gas - fired

generating blocks in 2011 Q4

### Updated September 2, 2011 page 3

**Plant/Unit County**  **NOx Control**

**Operation (SCR) NOx Control** 

**(SCR) required by**  **rule (sss) 1**  **SO2 Control**

**Operation (FGD) SO2 Control**  **(FGD) required by**  **rule (sss) Other** 

**Controls Comments** 
Wansley 1 Heard 2002 (ozone season

oper.) 12/31/08 12/1/08 12/31/08 LNB/OFA ESP Wansley 2 Heard 2003 (ozone season

oper.) 12/31/09 5/1/09 12/31/0 9 LNB/OFA ESP
Yates 1 Coweta No requirement prior to 2008

– but not required 12/31/08 LNB ESP Yates 2
- 5 Coweta No requirement No requirement ESPs Yates 6 Coweta 6/1/15 6/1/15 LNB ESP Yates 7 Coweta 6/1/15 6/1/15 LNB ESP (1) year
- round operation required (2) Source: Georgia Power Integrated Resource Plan, updated August 2011 (3) Georgia Power will shut down McDonough’s coal
- fired Units 1 and 2 by these dates and replace them with three new gas
- fired combined cycle (c om bustion turbine and duct burner) blocks of 840 MW each. Annual potential emissions from the three generating blocks were estimated in the PS D Prelimary Determination dated November 2007 (see Permit Application No. 17297 and Permit 4911
- 067
- 0003
- V
- 02
- 2 ) . NOx emissions from each block will be controlled by an SCR and a low
-NOx burner. **Blk 4 annual**

**em issions**  **Blk 5 annual**

**em issions**  **Blk 6 annual**

**em issions**  SO2 (tons) 19 19 18 NOx( tons) 217 217 200 PM10 (tons) 203 203 175

### Updated September 2, 2011 page 4 **Bowen –**  **Removal Efficienc ies of Added Controls**  **Plant/Unit 2008 Controls** 

NOx SO2 PM/Hg **Controls Added after 2008**  NOx SO2 PM/Hg **Rem oval**  **Efficiency of Added Controls**  **Efficiency**

**Basis Requirement for** 

**additional control Comments** 

Bowen 1 SCR (ozone season)

LNB/OFA SCR Oct
- April 

### 82.5 % VI STAS inventory Rule (sss)

none FGD (bubbler) 

### 95% VI STAS inventory Rules (sss) and

(uuu) ESP FGD cobenefit 

### 50% EPA 1 Bowen 2 SCR (ozone season)

LNB/OFA SCR Oct
- April 

### 82.5 % VI STAS inventory Rule (sss)

none FGD (bubbler) 

### 95% VI STAS inventory Rules (sss) and

(uuu) ESP FGD cobenefit 

### 50% EPA 1 Bowen 3 SCR (ozone season)

LNB/OFA SCR Oct
- April 

### 82.5 % VI STAS inventory Rule (sss) FGD (bubbler)

– SEE COMMENT FGD (bubbler) full year operation

– SEE COMMENT 

### 95%
- SEE

COMMENT VI STAS

inventory Rules (sss) and

(uuu) FGD was started up in May

2008 and operated for partial ye ar ESP FGD cobenefit 

### 50% EPA 1 Bowen 4 SCR (ozone season)

LNB/OFA SCR Oct
- April 

### 82.5 % VI STAS inventory Rule (sss)

none FGD (b ubbler) 

### 95% VI STAS inventory Rules (sss) and

(uuu) ESP FGD cobenefit 

### 50% EPA 1 

### (1) Table 5.4
- 1 on page 5.4
- 24 of EPA document "Stationary Source Control Techniques Document for Fine Particulate Matter" (EC/R In corporated, 1998).

### Updated September 2, 2011 page 5 **Branch –**  **Removal Efficiencies of Added Controls**  **Plant/Unit 2008 Controls** 

NOx SO2 PM/Hg **Controls Added after 2008**  NOx SO2 PM/Hg **Rem oval**  **Efficiency of Added Controls**  **Efficiency**

**Basis Requirement for** 

**additional control Comments** 

Branch 1 LNB SCR 

### 82.5 % VI STAS inventory Rule (sss) GPC has filed request to GA PSC to shut down Unit 1 in 2013 none FGD (bubbler) 

### 95% VI STAS inventory Rules (sss) and

(uuu) ESP FGD cobenefit 

### 50% EPA 1 Branch 2 LNB SCR 

### 82.5 % VI STAS inventory Rule (sss) GP C has filed request to GA PSC to shut down Unit 2 in 2013 none FGD (bubbler) 

### 95% VI STAS inventory Rules (sss) and

(uuu) ESP FGD cobenefit 

### 50% EPA 1 Branch 3 LNB SCR 

### 82.5 % VI STAS inventory Rule (sss)

none FGD (bubbler) 

### 95% VI STAS inventory Rules (sss) and

(uuu) ESP FGD cobenefit 

### 50% EPA 1 Branch 4 LNB SCR 

### 82.5 % VI STAS inventory Rule (sss)

none FGD (bubbler) 

### 95% VI STAS inventory Rules (sss) and

(uuu) ESP FGD cobenefit 

### 50% EPA 1 

### (1) Table 5.4
- 1 on page 5.4
- 24 of EPA document "Stationary Source Control Techniques Document for Fine Particulate Matter" (EC/R In corporated, 1998).

### Updated September 2, 2011 page 6 **Wansley –**  **Removal Efficiencies of Added Controls Plant/Unit**  **2008 Controls**

NOx SO2 PM/Hg **Controls Added after 2008**  NOx S O2 PM/Hg **Rem oval**  **Efficiency of Added Controls**  **Efficiency**

**Basis Requirement for** 

**additional control Comments** 

Wansley 1 SCR (ozone season)

LNB/OFA SCR Oct
- April 

### 82.5 % VI STAS inventory Rule (sss)

none FGD (bubbler) 

### 95% VI STAS inventory Rules (sss) and

(uuu) ESP FGD cobenefit 

### 50% EPA 1 Wansley 2 SCR (ozone season)

LNB/OFA SCR Oct
- April 

### 82.5 % VI STAS inventory Rule (sss)

none FGD (bubbler) 

### 95% VI STAS inventory Rules (sss) and

(uuu) ESP FGD cobenefit 

### 50% EPA 1 

### (1) Table 5.4
- 1 on page 5.4
- 24 of EPA document "Stationary Source Control Techniques Document for Fine Particulate Matter" (EC/R In corporated, 1998).

### Updated September 2, 2011 page 7 **Yates –**  **Removal Efficiencies of Added Controls Plant/Unit**  **2008 Controls**

NOx SO2 PM/Hg **Controls Added after**  **2008** NOx SO2 PM/Hg **Rem oval**  **Efficiency of Added Controls**  **Efficiency**

**Basis Requirement for** 

**additional control Comments** 

Yates 1 LNB SCR 

### 82.5 % VI STAS inventory Rule (sss) FGD (bubbler) FGD operation required by rule (sss) 

### No additional

removal VI STAS

inventory ; CAMD records Rules (sss) and

(uuu) CAMD SO2 emissions records for

2006

– 2010 indicate that FGD operating essentially year
- round prior to 2007. ESP, FGD cobenefit FGD operation required by rule (sss) 

### No additional

removal Yates 6 LNB SCR 

### 82.5 % VI STAS inventory Rule (sss)

none FGD (bubbler) 

### 95% VI STAS inventory Rules (sss) and

(uuu) ESP FGD cobenefit 

### 50% EPA 1 Yates 7 LNB SCR 

### 82.5 % VI STAS inventory Rule (sss)

none FGD (bubbler) 

### 95% VI STAS inventory Rules ( sss) and

(uuu) ESP FGD cobenefit 

### 50% EPA 1 

### (1) Table 5.4
- 1 on page 5.4
- 24 of EPA document "Stationary Source Control Techniques Document for Fine Particulate Matter" (EC/R In corporated, 1998).