1 2 3 4 5 6 7 8 9 **Capacity Fuel** 
Unique ID Name Plant Code **Unit MW gross**  **Fuel Avg NOx**  **Avg SO2 2011NOx**  113_1 Cholla 113 1 113.6 C 0.188 0.118 0.22 Notes: 1 1 1
Notes 1 Determined from data reported to US EPA and available on the Clean Air Markets Division Web Site

2 Selected as higher of 2008-2010 average or 2011 average unless there was reason to believe that an implemented change in equipment had reduced emissions for 2011 3 This is an estimate from 2008-2011 period based upon reported heat input, capacity and heat rate in NEEDS v4.10 4 From NEEDS v4.10

Economic Assumptions: Capital Recovery Factor 9.44%

Interest Rate 7.00% Period (yrs) 20
Insurance 0.30% From Integrated Planning Model ver 4.10 documentationpage 8-11 Property Taxes 0.90% From Integrated Planning Model ver 4.10 documentationpage 8-11 **2008-2010 Reported Avg 2011 Reported Rates** 10 11 12 13 14 **2008-2011**
**2011 SO2 model NOx**  **model SO2 Capac. Fctr**  **Heat Rate (Btu/kwh)**  **Heat Duty**

**(MMBtu/hr) Burner**  **Controls**
0.202 0.22 0.202 86% 10964 1,246T LNC2 1 2 2 3 4 Determined from data reported to US EPA and available on the Clean Air Markets Division Web Site Selected as higher of 2008-2010 average or 2011 average unless there was reason to believe that an implemented change in equipment had reduced emissions for 2011 This is an estimate from 2008-2011 period based upon reported heat input, capacity and heat rate in NEEDS v4.10

From Integrated Planning Model ver 4.10 documentationpage 8-11 From Integrated Planning Model ver 4.10 documentationpage 8-11 **modelled rate 2011 Reported Rates** Printed 7/17/2013



### APS Cholla 1 - SO2 Control Options

**Unit Control Option**  **Ctrl Eff Total Capital Cost**  **Total Annual Cost (lb/MMBtu)**  **(lb/hr) (tpy)**  **(%) Ave**  **Incr** Cholla 1 Uncontrolled 2.40 2989 11,260

-- 2

-- -- -- --

Wet lime FGD (existing) 0.202 252 948 92% 1

-- -- -- -- Wet Lime FGD (upgrades) 0.150 187 704 94% 3 $11,360,000 $1,274,328 4 $5,223

-- WFGD (new) 0.06 75 281 98% $80,473,547 $13,389,653 $20,098 $28,693 1 Based on 2011 annual average CAMD emission data, which corresponds to the first full year under the new Lee Ranch/El Segundo coal contract 2 Based on Lee Ranch/El Segundo NM coal contract specification 3 DFGD upgrade performance is determined based on 95% control efficiency (not by a particular design emission rate) 4 Based on an IPM assumption that FGD minor upgrades would cost $100/kw **SO 2** **Emission Rate N** **o t** **e s** **N o** **t e** **s Cost effectiveness ($/ton)** 

### Variable **Designation Units**  **Value**

Unique ID 113_1 Plant Name Cholla Unit # 1 Unit Size A MW 113.6 Gross Heat Rate C Btu/kwhr 10964 SO2 Rate D lb/Mmbtu 2.40 CF 86.0% Type of Coal E sub Coal Factor F 1.05 Retrofit Factor B 1 HR Factor G 1.0964 Heat Input H Btu/hr 1.25E+09 Limestone Rate K ton/hr 2.62 Waste Rate L ton/hr 4.74
Aux. Power M % 1.75 Makeup Water Rate N (1000gph) 10 Limestone Cost P $/ton 15 Waste Disposal Cost Q $/ton 30 Aux Power Cost R $/kwh 0.06 Makeup Water Cost S $/1000 1 Operating Labor Rate T $/hr 60

**Capital Cost Calculation (includes equipment, installation, buildings, foundations,electrical, minor physical/chemical ww treatment and retrofit difficulty)** BMR ($) = base absorber island cost 18,145,457 BMF ($) = base reagent preparation cost 7,524,169 BMW ($) = base waste handling cost 4,578,593 BMB ($) = BOP cost 31,654,510 BMWW ($) = Waste water treatment BM ($) = Total base cost 61,902,729 BM ($/KW) = 545 **Total Project Cost**

A1 = 10% of BM ($) = Eng. and Construction management 6,190,273 A2 = 10% of BM ($) = Labor adjustment 6,190,273 A3 = 10% of BM ($) = Contractor profit/fees 6,190,273**CECC ($) =** Cap., Eng. and management 80,473,547 **CECC ($/kw) =** 708 B1 = 5% of CECC owners cost
- **TPC' ($) =** TPC w/o AFUDC 80,473,547 **TPC' ($/kw) =** 708 B2 = 10% of TPC' AFUDC (3yr cycle)

- **TPC ($) = Total project cost**  80,473,547 **TPC ($/kw) =** 708
**Fixed O&M Cost**FOMO ($/kw-yr) = fixed O&M - additional labor cost 13.2

FOMM ($/kw-yr) = fixed O&M - additional maintenace, mtl and labor cost 8.2 FOMA ($/kw-yr) = fixed O&M - additional administration labor cost 0.49 FOMWW ($/kw-yr) = fixed O&M - wastewater treatment **FOM ($/kw-yr) = Total Fixed O&M Cost**  21.85
**Variable O&M Cost**

VOMR ($/MWhr) = Variable O&M - limestone 0.35 VOMW ($/MWhr) = Variable O&M - waste disposal 1.25 VOMP ($/MWhr) = Variable O&M - aux. power 1.05 VOMM ($/MWhr) = Variable O&M - makeup water 0.09 VOMWW ($/MWhr) = Variable O&M - water treatment **VOM ($/MWhr) = Total Variable O&M Cost**  2.74

CR = 9.44% Property Taxes and Insurance 1.20%

Total Charge Rate 10.64%

Annualized Capital Cost 8,561,816 Fixed O&M Cost 2,482,211 Variable O&M Cost 2,345,626 **Total Cost/year** TPC*CR+(FOM*MW)+VOM(MW*8760)*CF 13,389,653

### Calculation

read from Plant Data table read from Plant Data table read from Plant Data table read from Plant Data table
read from Plant Data table user input Bit=1; PRB=1.05; Lig=1.07 1 = typical retrofit C/10000 A*C*1000 17.52*A*D*G/2000 1.811*K (1.05e^(0.155*D))*F*G (1.674*D+74.68)*A*F*G/1000

Total Labor Cost

**Capital Cost Calculation (includes equipment, installation, buildings, foundations,electrical, minor physical/chemical ww treatment and retrofit difficulty)**Source data

http://www.epa.gov/airmarkets/progsregs/epa-ipm/BaseCasev410.html#documentationSource data

http://www.epa.gov/airmarkets/progsregs/epa-ipm/BaseCasev410.html#documentation

### Variable **Designation Units**  **Value**

Unique ID 113_1 Plant Name Cholla Unit Number 1 Unit Size A MW 113.6 Gross Heat Rate C Btu/kwhr 10964 SO2 Rate D lb/Mmbtu 0.202 CF 0.86 Type of Coal E sub Coal Factor F 1.05 Retrofit Factor B 1 HR Factor G 1.0964 Heat Input H Btu/hr 1.25E+09 Limestone Rate K ton/hr 0.13 Waste Rate L ton/hr 0.23
Aux. Power M % 1.25 Makeup Water Rate N (1000gph) 10 Limestone Cost P $/ton 15 Waste Disposal Cost Q $/ton 30 Aux Power Cost R $/kwh 0.06 Makeup Water Cost S $/1000 1 Operating Labor Rate T $/hr 60

**Capital Cost Calculation (includes equipment, installation, buildings, foundations,electrical, minor physical/chemical ww treatment and retrofit difficulty)**

BMR ($) = base absorber island cost BMF ($) = base reagent preparation cost BMW ($) = base waste handling cost BMB ($) = BOP cost BMWW ($) = Waste water treatment BM ($) = Total base cost BM ($/KW) = **Total Project Cost** A1 = 10% of BM ($) =

Eng.and Construction management A2 = 10% of BM ($) = Labor adjustment A3 = 10% of BM ($) = Contractor profit/fees

**CECC ($) =** Cap., Eng. and management**CECC ($/kw) =**

B1 = 5% of CECC owners cost **TPC' ($) =** TPC w/o AFUDC **TPC' ($/kw) =**
B2 = 10% of TPC' AFUDC (3yr cycle) **TPC ($) = Total project cost**  11,360,000 **TPC ($/kw) =** 100
**Fixed O&M Cost**

FOMO ($/kw-yr) =

fixed O&M - additional labor cost FOMM ($/kw-yr) = fixed O&M - additional maintenace, mtl and labor cost FOMA ($/kw-yr) = fixed O&M - additional administration labor cost FOMWW ($/kw-yr) =

fixed O&M - wastewater treatment **FOM ($/kw-yr) = Total Fixed O&M Cost** 
**Variable O&M Cost** VOMR ($/MWhr) = Variable O&M - limestone 0.02 VOMW ($/MWhr) =Variable O&M - waste disposal 0.06 VOMP ($/MWhr) = Variable O&M - aux. power VOMM ($/MWhr) = Variable O&M - makeup water VOMWW ($/MWhr) =

Variable O&M - water treatment **VOM ($/MWhr) = Total Variable O&M Cost**  0.08

CR = 9.44% Property Taxes and Insurance 1.20%

Total Charge Rate 10.64%

CF 86% Control Efficiency for SO2>3lb/Mbtu=98%; <3 = (SO2-0.06)/SO2 26% **Uncontrolled Rate**

SO2 Rate (lb/hr)(lb/Mbtu*Heat Input)/1000000 252 SO2 Rate (lb/MMBtu) 0.202

SO2 (TPY) Lb/hr*8760*CF/2000 948 **Controlled Rate**

SO2 Rate (lb/hr) 186.8 SO2 Rate (lb/MMBtu) 0.15

SO2 (TPY) 704Annualized Capital Cost $1,208,624 Fixed O&M Cost $0 Variable O&M Cost $65,704 **Total Cost/year** TPC*CR+(FOM*MW)+VOM(MW*8760)*CF 1,274,328

### Calculation

user input user input user input user input Bit=1; PRB=1.05; Lig=1.07 1 = typical retrofit C/10000 A*C*1000 SO2 rate (ca/S=1) 1.811*K (1.05e^(0.155*D))*F*G (1.674*D+74.68)*A*F*G/1000

Total Labor Cost

**Capital Cost Calculation (includes equipment, installation, buildings, foundations,electrical, minor physical/chemical ww treatment and retrofit difficulty)**$100/kW assumed based upon MATS assumptions

See page #43 of this document: http://www.epa.gov/airmarkets/progsregs/epa-ipm/docs/SuppDoc410MATS.pdf).See page #43 of this document: http://www.epa.gov/airmarkets/progsregs/epa-ipm/docs/SuppDoc410MATS.pdf).