## Look-up tables and scenario notes for BART modeling of three Arizona power plants sjb 2012-06-28



### AEPCO Apache Control scenarios Lookup table names: 'apache_scen' and 'apache_scen_' modscenscenariosunit 1 unit 2 unit 3 **short decription** UNC description Notes on UNC **base Base**  **OFA OFA**  **OFA Base (OFA)**  Base (u2 LNB) Orig. assumed u2 had LNB ctrl1 Ctrl-1 OFA OFA LNB LNB u3 u2 Base LNB, u3 LNB/OFAOrig. assumed u2 had LNB ctrl2 Ctrl-2 OFA SNCR (no LNB) SNCR + LNB SNCR (u2 no LNB) LNB/SNCR SNCR -30% on pre-LNB u2; u3 ~OK ctrl3 **Ctrl-3 OFA**  SCR + LNB SCR + LNB SCR LNB/SCR SCR+LNB -87% on u2 is OK; u3 ~OK ctrl4 Ctrl-4 OFA OFA SNCR + LNB SNCR u3 u2 Base LNB, u3 LNB/SNCRNo LNB % used on u2; u3 OK ctrl5 Ctrl-5 OFA OFA SCR + LNB SCR u3 u2 Base LNB, u3 LNB/SCRNo LNB % used on u2; u3 OK ctrl6 Ctrl-6 OFA SNCR (no LNB) SCR + LNB SNCR u2 (no LNB), SCR u3 u2 LNB/SNCR, u3 LNB/SCRSNCR -30% on pre-LNB u2 **ctrl1_R Ctrl1-R**  **OFA LNB**  **LNB LNB**  LNB/OFA Rev. LNB -30% applied OK on both **ctrl2_R Ctrl2-R**  **OFA SNCR + LNB**  **SNCR + LNB SNCR**  LNB/SNCR Rev. SNCR & LNB each -30% OK on both **ctrl3_S Ctrl3-S**  **OFA SCR+LNB; w/SO4** **SCR+LNB; w/SO4 SCR; w/SO4**  LNB/SCR SO4 SensitivitySCR+LNB -87% on u2 is OK; u3 OK 

### "-R" for Revision: unit 2 base emissions recognized as pre-LNB, LNB -30% applied OK; unit 3 SNCR+LNB -51% instead of -50%; Ctrl-3 was OK w/o revision ATP knew Apache had no LNB; all % reductions computed from CY2008-2010 average annual emissions and are OK.

**APS Cholla Control scenarios** Lookup table names: 'cholla_scen' and 'cholla_scen_' modscenscenariosunit 2 unit 3 unit 4 **short decription** UNC description Notes on UNC base Base COFA COFA COFA Pre-LNB Base; old SO2 Base (LNB/SOFA) Pre-LNB max used ctrl1 Ctrl-1 SNCR (preLNB) SNCR (preLNB)SNCR (preLNB)SNCR (preLNB; old SO2) LNB/SNCR SNCR -30% on pre-LNB (none: old ctrl2)

Ctrl-2 SCR (preLNB) SCR (preLNB) SCR (preLNB) SCR (preLNB; old SO2) SCR SCR .05: -84%, -80%, -81% on pre-LNB ctrl3 Ctrl-3 COFA COFA SNCR (preLNB)SNCR u4 (preLNB; old SO2) u2 SNCR u4 SNCR % on pre-LNB ctrl4 Ctrl-4 COFA COFA SCR (preLNB) SCR u4 (preLNB; old SO2) u4 SCR u4 SCR .05: -81% on pre-LNB ctrl5 Ctrl-5 COFA SNCR (preLNB)COFA SNCR u3 (preLNB; old SO2) u3 SNCR u3 SNCR -30% on pre-LNB ctrl6 Ctrl-6 COFA SCR (preLNB) COFA SCR u3 (preLNB; old SO2) u3 SCR u3 SCR .05: -80% on pre-LNB basenewBasecorrCOFA COFA COFA Base (COFA) Base (LNB/SOFA) This & later use ADEQ BART SO2 **base_r Rev Base** **LNB+SOFA/COFA LNB+SOFA/COFA** **LNB+SOFA/COFA Base (LNB)**  Base (LNB/SOFA) Rev. This & later use post-LNB max emissions **ctrl1_r CTRL1_R** **SNCR + LNB SNCR + LNB**  **SNCR + LNB SNCR**  LNB/SNCR Rev. SNCR -30% on post-LNB ctrl2 CTRL2 SCR (preLNB) SCR (preLNB) SCR (preLNB) SCR (preLNB) SCR SCR % on pre-LNB ctrl2_r CTRL2_RSCR + LNB (% fr. '08-10)SCR + LNB SCR + LNB SCR (u2 CY2008-10) SCR Rev. SCR % on post-LNB, but u2 -80% old **ctrl2_r2 ctrl2_r2** **SCR + LNB SCR + LNB**  **SCR + LNB SCR**  SCR Addl Rev. All CY2010 base TPY; u2 SCR -83% 

### First set of runs used SO2 from max CAMD data; then switched to 0.15 lb/MMBtu per ADEQ's BART determination for SO2 Also, earlier runs applied % control to pre-LNB CAMD emissions, so they reflect SNCR or SCR *without* LNB; later"_R" runs used post-LNB max daily emissions A final change was made for ctrl2_r2 SCR: ATP's -83% reduction to get to 0.5 lb/MMBtu was based on CY2011 TPY for unit 2 (units 3 &4 already used CY2011); previous SCR runs derived unit 2 SCR -84% reduction from CY2008-2010 TPY, which included a mix of pre- and post-LNB emission rates. Both CTRL2_R and CTRL2_R2 apply % SCR to post-LNB emissions; Only CTRL2_R2 uses u2 SCR % control from CY2011

## Look-up tables and scenario notes for BART modeling of three Arizona power plants sjb 2012-06-28



### SRP Coronado Control scenarios Lookup table names: 'coronado_scen' and 'coronado_scen_' modscenscenariosunit 1 unit 2 **short decription** UNC description Notes on UNC base Base OFA SCR @ .08 SCR.08 u2 u1 Base (LNB/OFA), u2 SCR.08 Assumed u1 had LNB ctrl1 Ctrl-1 SNCR (no LNB) SCR @ .08 SNCR (no LNB) u1; SCR.08 u2u1 SNCR u1 SNCR -30% on pre-LNB ctrl2 Ctrl-2 SCR @ .05 + LNB (-86% '08-10) SCR @ .08 SCR .05 (preLNB) u1; SCR.08 u2u1 SCR.05 SCR % applied OK (but u1 % bad) ctrl3 Ctrl-3 OFA SCR @ .05 SCR.05 u2 u2 SCR.05 Assumed u1 had LNB ctrl4 Ctrl-4 SNCR (no LNB) SCR @ .05 SNCR (no LNB); SCR.05 u1 SNCR, u2 SCR.05 u1 SNCR -30% on pre-LNB ctrl5 Ctrl-5 SCR @ .05 + LNB (-86% '08-10) SCR @ .05 SCR .05 (u2 preLNB) SCR.05 SCR % applied OK (but u1 % bad) base_R Base_R LNB + OFA SCR @ .08 LNB u1; SCR.08 u2 u1 Base (LNB/OFA), u2 SCR.08 Rev. Post-LNB max CAMD basis ctrl1_R Ctrl1-R SNCR + LNB SCR @ .08 SNCR u1; SCR.08 u2 u1 SNCR Rev. (rel. to Rev. Base) ctrl5_S Ctrl5-S SCR @ .05 + LNB (-86% '08-10) SCR @ .05 w/SO4 SCR.05 w/SO4 SCR.05 SO4 Sensitivity **base_RS base_rs** **LNB + OFA SCR @ .08 w/SO4**  **SCR .08 u2 w/SO4** Base Rev. SO4 Sensitivity ctrl5_R ctrl5_r rev. SCR @ .05 + LNB SCR @ .05 SCR .05 SCR.05 Rev. post-LNB for % and for max em. u1 **ctrl5_rs ctrl5_rs** **rev. SCR @ .05 w/SO4 + LNB SCR @ .05 w/SO4**  **SCR .05 w/SO4** SCR.05 Rev. SO4 Sensitivity(rel. to Base_R_S) base_q LNB + OFA LNB + OFA LNB only (on both) Base LNB for both units sjb u1=base_r; u2=post-LNB CAMD **ctrl1_rs SNCR + LNB**  **SCR @ .08 w/SO4 SNCR u1; w/SO4**  u1 SNCR Rev. w/SO4 sjb u1=ctrl1_r, u2=base_rs **ctrl2_rs rev. SCR @ .05 w/SO4 + LNB**  **SCR @ .08 w/SO4 SCR .05 u1; w/SO4**  u1 SCR.05 Rev. w/SO4 sjb u1=ctrl5_rs; u2=base_rs ctrl6_rs SCR -90% from LNB w/SO4SCR -90% from LNB w/SO4 SCR -90%; w/SO4 SCR -90% w/SO4 sjb LNB base_q, -90% (both u1 & u2) 

### "_R" for Revision means post-LNB max emissions were used as basis; 'scenarios' names sometimes have an underscore where 'UNC lookup' has a hyphen ATP knew Coronado had LNB; u1 % reduction from mixed pre- & post-LNB CY2008-10, see revised; u2 % from post-LNB CY2011, OK. Unit 2 was modeled directly at 0.05 and 0.08 lb/MMBtu (& max heat MMBtu/hr), not as a % reduction from a base period. Modeling for base_q, ctrl1_rs, ctrl2_rs, and ctrl6_rs were done by sjbLists from "AZ_BART_sources_final_all-Task7-8_05_15_2012.xlsx"

**TEP Sundt (Irvington)**  **Catalyst Paper -**

**Snowflake Chem** **ical Lim e** 

**Co. - Nelson Plant**  **Apache Station**

**(AEPCO) APS Cholla** 

**Power Plant SRP Coronado** 

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