# Updated Costs (June 2011 Basis) for Selected Bituminous Baseline Cases
August 2012

DOE/NETL

-341/0823 12

### Updated Costs (J une 2011 Basis)



# Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed therein do not necessarily state or reflect those of the United States Government or any agency thereof.

### Updated Costs (J une 2011 Basis)


# Updated Costs (June 2011 Basis) for Selected Bituminous Baseline Cases

DOE/NETL

-341/0823 12

Final Report August 2012

NETL Contact:

James Black General Engineer Office of Program Planning & Analysis, Performance Division

National Energy Technology Laboratory www.netl.doe.gov

### Updated Costs (J une 2011 Basis)



# Prepared by: Energy Sector Planning and Analysis (ESPA)

Lora Pinkerton WorleyParsons Group, Inc. Elsy Varghese WorleyParsons Group, Inc.

Mark Woods Booz Allen Hamilton, Inc.

DOE Contract Number DE

-FE0004001

### Updated Costs (J une 2011 Basis)


# Acknowledgments
This report was prepared by Energy Sector Planning and Analysis (ESPA) for the United States Department of Energy (DOE), National Energy Technology Laboratory (NETL) . This work was completed under DOE NETL Contract Number DE

-FE0004001 . This work was performed under ESPA Task 04001.341.02, Activity 003

. The authors wish to acknowledge the excellent guidance, contributions, and cooperation of the NETL staff, particularly:
John Wimer, Division Director, Office of Program Planning & Analysis

James Black, NETL Technical Monitor

Kristin Gerdes , General Engineer

Tim Grant, Physical Scientist
David Morgan, Physical Scientist

### Updated Costs (J une 2011 Basis)



# This page intentionally left blank.

### Updated Costs (J une 2011 Basis)



# i 

# Table of Contents

1 Introduction

................................ ................................ ................................ ................................ ... 1 2 Cost Escalation Factors

................................ ................................ ................................ ................. 3 3 Updated Transport and Storage Cost Methodology

................................ ................................ ...... 5 4 Capital and O&M Cost Tables

................................ ................................ ................................ ...... 7 5 Summary of Results

................................ ................................ ................................ ....................48

### Updated Costs (J une 2011 Basis)



# ii 

# Exhibits

Exhibit 1

- 1 Summary of results using June 2011 cost basis

................................ ........................... 2 Exhibit 3

- 1 CO2 

# Transport and Storage Costs

................................ ................................ ............... 6 Exhibit 4

- 1 Comparison of fuel and consumable unit costs

................................ ........................... 7 Exhibit 4

-2 Case 1 capital and owner’s costs

................................ ................................ ................. 8 Exhibit 4

- 3 Case 1 O&M costs

................................ ................................ ................................ ..... 12 Exhibit 4

-4 Case 2 Capital and owner’s costs

................................ ................................ .............. 13 Exhibit 4

-5 Case 2 O&M costs

................................ ................................ ................................ ..... 1 7 Exhibit 4

- 6 Case 9 capital and owner’s costs

................................ ................................ ............... 18 Exhibit 4

-7 Case 9 O&M costs

................................ ................................ ................................ ..... 22 Exhibit 4

- 8 Case 10 capital and owner’s costs

................................ ................................ ............. 23 Exhibit 4

-9 Case 10 O&M costs

................................ ................................ ................................ ... 27 Exhibit 4

- 10 Case 11 capital and owner’s costs

................................ ................................ ........... 28 Exhibit 4

- 11 Case 11 O&M costs

................................ ................................ ................................ . 32 Exhibit 4

- 12 Case 12 capital and owner’s costs

................................ ................................ ........... 33 Exhibit 4

- 13 Case 12 O&M costs

................................ ................................ ................................ . 37 Exhibit 4

- 14 Case 13 capital and owner’s costs

................................ ................................ ........... 38 Exhibit 4

- 15 Case 13 O&M costs

................................ ................................ ................................ . 42 Exhibit 4

- 16 Case 14 capital and owner’s costs

................................ ................................ ........... 43 Exhibit 4

- 17 Case 14 O&M costs

................................ ................................ ................................ . 47 Exhibit 5

- 1 Summary of results using June 2011 cost basis

................................ ......................... 49 Exhibit 5

-2 COE by cost component

................................ ................................ ............................ 50 Exhibit 5

- 3 First year CO 2 

# capture and avoided costs

................................ ................................ .. 51

### Updated Costs (J une 2011 Basis)



# iii 

# Acronyms and Abbreviations

BB Bituminous Baseline Btu British thermal units CE Chemical Engineering CCS Carbon capture and sequestration CO2 

## Carbon dioxide COE Cost of electricity CTS CO2 

## transport and storage ESPA Energy Sector Planning and Analysis GEE General Electric Energy GJ Gigajoule Gt Gigatonne gpm Gallons per minute HHV Higher heating value hr Hour IGCC Integrated gasification combined cycle IRROE Internal rate of return on equity Kg Kilogram km kilometer kW Kilowatt Lb Pound

m3 

## Cubic meter mi Mile MVA Monitoring, verification and accounting NETL National Energy Technology Laboratory PC Pulverized Coal SC Supercritical SCR Selective catalytic reduction TASC Total as

- spent cost TOC Total overnight cost T&S Transport and storage TS&M Transport, storage and monitoring °C Degrees Celsius °F Degrees Fahrenheit

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# iv This page intentionally left blank.

### Updated Costs (J une 2011 Basis)



# 1 

# 1 Introduction
The latest series of baseline reports prepared for NETL was begun in 2004, and the report commonly referred to as the Bituminous Baseline Report (“Cost and Performance Baseline for Fossil Energy Plants, Volume 1: Bituminous Coal and Natural Gas to Electricity”) was first published in May 2007. The initial issue of the Bituminous Baseline Report used a cost basis of January 2007 dollars. The report was subsequently updated in August 2007 and again in November 2010. The cost basis was updated to June 2007 dollars in the November 2010 issue. Recently, the capital and O&M costs for selected cases were re

-estimated using a cost basis of June 2011 dollars

. The eight cases that are the subject of this report include:

**•** Case 1

– GEE IGCC without CO2 

# capture

**•** Case 2

– GEE IGCC with CO2 

# capture

**•** Case 9

– Subcritical PC without CO2 

# capture

**•** Case 10

– Subcritical PC with CO2 

# capture

**•** Case 11

– Supercritical PC without CO2 

# capture

**•** Case 12

– Supercritical PC with CO2 

# capture

**•** Case 13

– Natural gas combined cycle without CO2 

# capture

**•** Case 14

– Natural gas combined cycle with CO2 

# capture The Total Overnight Cost (TOC) and first year Cost of Electricity (COE) are summarized in Exhibit 1

- 1

. The previous values (2007 dollar cost basis) are included for reference and the values with and without CO2 

# sequestration costs are shown for the capture cases. The difference in sequestration costs reflects a change in methodology in addition to the escalation incurred from 2007 to 2011. The new approach is described in more detail below.
The increase in TOC from 2007 to 2011 averaged about 20 percent. The COE for the coal cases increased approximately 3 7 percent. The increase in COE for the natural gas cases was small since the increase in COE associated with the increased TOC was nearly offset by a fuel cost reduction

.

### Updated Costs (J une 2011 Basis)



# 2 Exhibit 1
- 1 Summary of results u sing new and old cost basis



# Case TOC, MM$ TOC, $/kW COE (w/o TS&M), $/MWh COE (w/TS&M), $/MWh

June 2011 Cost Basis

1 1,847 2,969 101.16 N/A

2 2,220 4
,086 133.07 1 41

.47

9 1,331 2,420 82.27 N/A

10 2,441 4,438 142.04 1 52

. 85

11 1,348 2,452 80.95 N/A

12 2,415 4,391 137.28 147 .27

13 495 891 59.59 N/A

14 872 1,842 86.58 90

.43

June 2007 Cost Basis

1 1,522 2,447 76.28 N/A

2 1,811 3,334 100.39 105.57

9 1,098 1,996 59.40 N/A

10 1,985 3,610 103.80 109.58

11 1,113 2,024 58.91 N/A

12 1,964 3,570 100.94 106.53

13 398 718 58.90 N/A

14 709 1,497 82.72 85.89
The balance of this report includes the following: the factors that impact cost escalation are discussed in Section 2 ; the new T&S methodology is described in Section 3 ; the capital and O&M costs for each case are compiled in Section 4 ; and a summary of the new cost results including costs of CO2 

# captured and avoided is provided in Section 5

.

### Updated Costs (J une 2011 Basis)



# 3 

# 2 Cost Escalation Factors Escalation factors for the various cost elements were developed using a number of sources including: the Chemical Engineering (CE) Plant Cost Index, recent vendor quotations for similar equipment and materials, monthly mill pricing updates for structural steel, cost trending input from vendors, and published wage rate information. In general the CE Index tends to trend slightly lower than costs developed using other sources. This can be due to several reasons including specific equipment design/sizing parameters and market conditions. In particular the index value for construction labor and engineering services was not used here because it almost always trends at a much lower rate than other sources employed. The resulting escalation averaged about 20 percent across accounts with modest variations caused by the distribution of labor, materials and equipment costs as well as the equipment type. Equipment accounts that don’t follow the general cost escalation trend are described below:

**•** Case 1, Account 4.6 (Soot Recovery & SARU): The original estimate (2007 dollars) had an incorrect value that was fixed prior to escalating the account making the escalation appear to be greater than reality.

**•** Cases 1 and 2, Account 5A.6 (Blowback Gas Systems): The GEE gasifier does not use candle filters and therefore no blowback gas system is required. This account was inadvertently included in the previous estimate, but has been eliminated in the current version.

**•** Cases 1, 2, 13 and 14, Account 7.1 (Heat Recovery Steam Generator): The HRSG costs

were re

-calibrated using a series of more recent quotes that were also closer in size to the baseline cases.

**•** Cases 1, 2, 13 and 14, Account 8.3 (Condenser and Auxiliaries): The condenser costs

were re

-calibrated using a series of more recent quotes that were also closer in size to the baseline cases.

**•** Cases 1, 2, 13 and 14, Account 8.4 (Steam Piping): The steam piping costs were re

calibrated using a series of more recent quotes that were also closer in size to the baseline

cases.

**•** Cases 1, 2, 13 and 14, Account 9.1 (Cooling Towers): The cooling tower costs were re

calibrated using a series of more recent quotes that were also closer in size to the baseline

cases.

**•** Cases 1 and 2: The consumables were generally escalated using the index for producer prices for industrial chemicals (per IHS Global Insight, Inc., and reported in Chemical Engineering). However, the Selexol solvent cost also included revised pricing from more recent quotes.

**•** Cases 9, 10, 11, 12, 13 and 14: The consumables were generally escalated using the index for producer prices for industrial chemicals (per IHS Global Insight, Inc., and reported in Chemical Engineering). However, the ammonia cost also included revised pricing from more recent quotes.

### Updated Costs (J une 2011 Basis)



# 4 **•** Cases 2, 10, 12 and 14, Account 5B.1 (CO2 

# Compression and Drying) : The CO2 

# compressor costs were re

-calibrated using a more recent quote in addition to the general cost escalation.

**•** All Cases, Account 11.8 (Main Power Transformers): The main power transformer cost

was re

-calibrated using a more recent quote in addition to the general cost escalation. In the PC cases the boiler and steam turbine costs were simply escalated because no newer quotes were available.

### Updated Costs (J une 2011 Basis)



# 5 

# 3 Updated Transport and Storage Cost Methodology
The cost of CO2 

# transport and storage (T&S) in a deep well saline formation is estimated using the FE/NETL CO2 

# Transport and Storage (CTS

-Saline) Cost Model. Additional detail on development of these costs is available in the Quality Guidelines for Energy System Studies (QGESS) on Carbon Dioxide Transport and Storage Costs in NETL Studies (2012). T&S costs are reported as first

-year costs in $/tonne of CO2

# , increasing at a nominal rate of 3 percent per year, consistent with the assumed general inflation rate. From the perspective of the CO2 

# source (e.g., a power plant or other energy conversion facility), these costs are treated as a disposal cost for each tonne of CO2 

# captured during the assumed 30

-year operational period. From the pipeline and storage site’s perspective, this cost represents the required revenue stream across the 30

-year operational period to cover all costs and provide the required internal rate of return on equity (IRROE). All costs are reported in 2011 dollars. Transport costs are based on a generic 100 km (62 mi) dedicated pipeline. High pressure (2,200 psig) CO2 

# is provided at the plant gate of the energy conversion facility and CO2 

# exits the pipeline terminus at a pressure of 1,200 psig, remaining in a supercritical phase. The pipeline diameter was sized for this to be achieved without the need for recompression stages along the pipeline length. Costs for additional compression that may be required for injection in a particular formation is included as part of storage costs. Transport costs are estimated to be $3.65/tonne CO2 

# . Storage costs are based on the CTS

-Saline Cost Model. This model provides detailed cost estimates for the injection and monitoring of CO2 

# under U.S. Environmental Protection Agency regulations for Class VI injection wells as well as monitoring and reporting requirements under Subpart RR of the Greenhouse Gas Reporting Rule. Inputs to the CTS

-Saline Cost Model that have a significant influence on cost include financial parameters, the timelines for the various stages of storage and important activities occurring in each stage. The financial parameters include:

**•** 

# Debt to equity ratio: 45%/55%

**•** 

# Nominal interest rate on debt: 5.5%/year

**•** 

# Nominal IRROE: 12%

**•** 

# Escalation rate: 3%

**•** 

# Financial responsibility requirements for post

-injection site care and site closure are met by pre

-funding a modified trust fund over the period of injection operations

**•** 

# Project contingency factor of 15% and process contingency factor of 20%

In the CTS

-Saline Cost Model, the sequestration process is divided into six stages. The timelines and important activities impacting costs for these stages are as follows:

**•** Regional evaluation and initial site selection: 1 year

**•** Site characterization: 3 years; four sites undergo site characterization with one successful site selected; pore space rights are leased

**•** Permitting: 2 years; drill, test and complete injection wells

### Updated Costs (J une 2011 Basis)



# 6 **•** Operations: 30 years; installation of buildings, surface equipment, monitoring wells and other monitoring equipment; comply with permit requirements; fund modified trust fund to cover financial responsibility requirements for post

-injection site care and site closure

**•** Post

-injection site care and site closure: 50 years; continue monitoring, verification and accounting (MVA) per permit; costs are covered by storage site operator’s trust fund

**•** Long

-term stewardship : (This stage is not explicitly included in the model.) The possible financial implication of long

-term stewardship is included in the model as a state

sponsored trust fund that the storage operator pays into during operations Due to the variances in the geologic formations that make up saline formations across the U.S., region

- specific storage and monitoring costs are developed to correspond to the plant locations used in NETL techno

-economic studies of energy conversion facilities. Results from the CTS

Saline Cost Model for storage and monitoring costs were aligned with the NETL studies by taking four generic plant locations and overlaying them with possible sequestration basins from the cost model resulting in the following pairings:

**•** Midwest plant location

– Illinois Basin

**•** Texas plant location

– East Texas Basin

**•** North Dakota plant location

– Williston Basin

**•** Montana plant location

– Powder River Basin
CO2 

# storage supply

-cost curves were developed for each of the four basins of interest with the resulting cost for each basin at 25 gigatonnes (Gt) of potential storage shown in Exhibit 3

- 1

. Choosing this point on the supply

-cost curves provides a conservative estimate of the storage cost since many decades, if not more than a century, will pass before 25 Gt of CO2 

# is stored in any of the four individual basins. For example, 25 Gt of storage would be sufficient for 125 GW of coal power with 90 percent CO2 

# capture operating over 30 years. The far right column of Exhibit 3

- 1 shows the total T&S costs now used in NETL system studies for each plant location.
Exhibit 3
- 1 CO 2 

## Transport and Storage Costs

Plant Location Basin Transport (2011$/tonne) Storage Cost at 25 Gt (2011$/tonne) T&S Value for System Studies 1



## (2011$/tonne)

Midwest Illinois

3.65 5.75 10

Texas East Texas 6.06 10

North Dakota Williston 10.96 15

Montana Powder River 17.86 22

1 

## The sum of transport and storage costs is rounded up to the nearest whole dollar

### Updated Costs (J une 2011 Basis)



# 7 

# 4 Capital and O&M Cost Tables The updated capital cost and O&M cost tables are contained in this section. In addition to the capital cost escalation, the following updates were included:

**•** Fuel costs were updated to June 2011 values according to the Quality Guidelines for Energy System Studies, “Fuel Prices for Selected Feedstocks in NETL Studies.” The current fuel costs are $2.94/MMBtu for Illinois No. 6 bituminous coal and $6.13/MMBtu for natural gas in the Midwest.

**•** The CO2 

# transport and storage (T&S) costs were estimated at $ 10/tonne CO2 

# sequestered. This value is representative of a Midwest location as described in Section 3

. A table comparing the change in unit cost of fuel and major consumables is shown in Exhibit 4

- 1

. Exhibit 4
- 1 Comparison of f uel and consumable u nit costs



# June 2007 Cost Basis June 2011 Cost Basis
Illinois No. 6 Coal, $/MMBtu 1.64 2.94
Illinois No. 6 Coal, $/ton 38.18 68.60
Natural Gas, $/MMBtu 6.55 6.13

Water Treatment Chemicals, $/lb 0.17 0.27 Selexol Solvent, $/gal 13.40 36.79
Activated Carbon, $/lb 1.05 1.63
MEA Solvent, $/ton 2,250 3,482
NaOH, $/ton 434 671

H2

# SO4

# , $/ton 139 215
Limestone, $/ton 21.63 33.48
Ammonia (19% NH3

# ), $/ton 130 330

### Updated Costs (J une 2011 Basis)



# 8 Exhibit 4
-2 Case 1 capital and owner’s costs

Client: USDOE/NETL Report Date: 2011-Oct-17 Project: Bituminous Baseline Study

Case: Case 1 GEE Radiant IGCC w/o CO2 Plant Size: 622.1 MW,net Estimate Type: Conceptual Cost Base (Jun) 2011 ($x1000) Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW

1.0 COAL & SORBENT HANDLING 1.1 Coal Receive & Unload $4,435 $0 $2,137 $0 $6,572 $571 $0 $1,429 $8,572 $14 1.2 Coal Stackout & Reclaim $5,731 $0 $1,370 $0 $7,101 $603 $0 $1,541 $9,244 $15 1.3 Coal Conveyors & Yd Crush $5,328 $0 $1,356 $0 $6,684 $568 $0 $1,450 $8,703 $14 1.4 Other Coal Handling $1,394 $0 $314 $0 $1,708 $145 $0 $370 $2,223 $4 1.5 Sorbent Receive & Unload $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.6 Sorbent Stackout & Reclaim $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.7 Sorbent Conveyors $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.8 Other Sorbent Handling $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.9 Coal & Sorbent Hnd.Foundations $0 $2,961 $7,739 $0 $10,701 $1,017 $0 $2,344 $14,061 $23 SUBTOTAL 1. $16,887 $2,961 $12,917 $0 $32,765 $2,904 $0 $7,134 $42,803 $69 2.0 COAL & SORBENT PREP & FEED 2.1 Coal Crushing & Drying w/ 2.3 $0 w/ 2.3 $0 $0 $0 $0 $0 $0 $0 2.2 Prepared Coal Storage & Feed $1,891 $454 $292 $0 $2,638 $218 $0 $571 $3,427 $6 2.3 Slurry Prep & Feed $25,812 $0 $11,252 $0 $37,064 $3,270 $1,853 $8,437 $50,625 $81 2.4 Misc.Coal Prep & Feed $1,040 $760 $2,238 $0 $4,037 $361 $0 $880 $5,278 $8 2.5 Sorbent Prep Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.6 Sorbent Storage & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.7 Sorbent Injection System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.8 Booster Air Supply System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.9 Coal & Sorbent Feed Foundation $0 $3,814 $3,273 $0 $7,087 $658 $0 $1,549 $9,294 $15 SUBTOTAL 2. $28,743 $5,028 $17,055 $0 $50,826 $4,507 $1,853 $11,437 $68,624 $110 3.0 FEEDWATER & MISC. BOP SYSTEMS 3.1 Feedwater System $3,474 $5,996 $3,144 $0 $12,614 $1,140 $0 $2,751 $16,505 $27 3.2 Water Makeup & Pretreating $755 $78 $415 $0 $1,248 $115 $0 $409 $1,773 $3 3.3 Other Feedwater Subsystems $1,953 $646 $577 $0 $3,176 $274 $0 $690 $4,140 $7 3.4 Service Water Systems $442 $881 $3,036 $0 $4,359 $414 $0 $1,432 $6,205 $10 3.5 Other Boiler Plant Systems $2,381 $889 $2,189 $0 $5,459 $497 $0 $1,191 $7,148 $11 3.6 FO Supply Sys & Nat Gas $380 $718 $665 $0 $1,764 $166 $0 $386 $2,315 $4 3.7 Waste Treatment Equipment $1,022 $0 $633 $0 $1,655 $159 $0 $544 $2,359 $4 3.8 Misc. Power Plant Equipment $1,277 $170 $664 $0 $2,111 $201 $0 $694 $3,006 $5 SUBTOTAL 3. $11,684 $9,379 $11,323 $0 $32,386 $2,967 $0 $8,097 $43,451 $70 4.0 GASIFIER & ACCESSORIES 4.1 Syngas Cooler Gasifier System (GE) $136,779 $0 $75,333 $0 $212,112 $19,109 $29,509 $39,951 $300,682 $483 4.2 Syngas Cooler (w/ Gasifier - $) w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.3 ASU/Oxidant Compression $195,451 $0 w/equip. $0 $195,451 $18,263 $0 $21,371 $235,086 $378 4.4 Scrubber & Low Temperature Cooling $7,080 $5,763 $5,957 $0 $18,800 $1,760 $0 $4,112 $24,671 $40 4.5 Black Water & Sour Gas Section w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.6 Soot Recovery & SARU $2,159 $1,025 $2,013 $0 $5,197 $488 $0 $1,137 $6,823 $11 4.8 Major Component Rigging w/4.1&4.2 $0 w/4.1&4.2 $0 $0 $0 $0 $0 $0 $0 4.9 Gasification Foundations $0 $7,429 $6,482 $0 $13,911 $1,293 $0 $3,801 $19,005 $31 SUBTOTAL 4. $341,469 $14,218 $89,784 $0 $445,472 $40,913 $29,509 $70,373 $586,267 $942 

### TOTAL PLANT COST SUMMARY

### Updated Costs (J une 2011 Basis)



# 9 Exhibit 4
-2 Case 1 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 5A GAS CLEANUP & PIPING 5A.1 Single Stage Selexol $50,584 $0 $42,628 $0 $93,212 $8,795 $0 $20,401 $122,408 $197 5A.2 Elemental Sulfur Plant $12,121 $2,363 $15,532 $0 $30,015 $2,851 $0 $6,573 $39,439 $63 5A.3 Mercury Removal $1,274 $0 $963 $0 $2,237 $211 $112 $512 $3,072 $5 5A.4 COS Hydrolysis $4,309 $0 $5,589 $0 $9,898 $940 $0 $2,168 $13,006 $21 5A.5 Particulate Removal $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.6 Blowback Gas Systems $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.7 Fuel Gas Piping $0 $882 $577 $0 $1,459 $127 $0 $317 $1,903 $3 5A.9 HGCU Foundations $0 $1,269 $855 $0 $2,124 $196 $0 $696 $3,017 $5 SUBTOTAL 5A. $68,289 $4,513 $66,144 $0 $138,946 $13,120 $112 $30,668 $182,845 $294 5B CO2 REMOVAL & COMPRESSION 5B.1 CO2 Removal System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5B.2 CO2 Compression & Drying $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 5B. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.0 COMBUSTION TURBINE/ACCESSORIES 6.1 Combustion Turbine Generator $104,200 $0 $7,506 $0 $111,706 $10,304 $5,585 $12,760 $140,356 $226 6.2 Syngas Expander $7,146 $0 $981 $0 $8,126 $752 $0 $1,332 $10,210 $16 6.3 Compressed Air Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.9 Combustion Turbine Foundations $0 $1,016 $1,175 $0 $2,191 $205 $0 $719 $3,115 $5 SUBTOTAL 6. $111,346 $1,016 $9,662 $0 $122,024 $11,261 $5,585 $14,810 $153,681 $247 7.0 HRSG, DUCTING & STACK 7.1 Heat Recovery Steam Generator $31,080 $0 $6,019 $0 $37,099 $3,441 $0 $4,054 $44,594 $72 7.2 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7.3 Ductwork $0 $2,079 $1,457 $0 $3,537 $301 $0 $767 $4,605 $7 7.4 Stack $4,013 $0 $1,497 $0 $5,510 $514 $0 $602 $6,626 $11 7.9 HRSG,Duct & Stack Foundations $0 $764 $767 $0 $1,531 $143 $0 $502 $2,175 $3 SUBTOTAL 7. $35,093 $2,843 $9,740 $0 $47,676 $4,399 $0 $5,926 $58,001 $93 8.0 STEAM TURBINE GENERATOR 8.1 Steam TG & Accessories $38,070 $0 $5,979 $0 $44,049 $3,879 $0 $4,793 $52,721 $85 8.2 Turbine Plant Auxiliaries $243 $0 $554 $0 $798 $76 $0 $87 $961 $2 8.3 Condenser & Auxiliaries $3,300 $0 $1,776 $0 $5,076 $476 $0 $555 $6,107 $10 8.4 Steam Piping $15,350 $0 $6,657 $0 $22,006 $1,683 $0 $5,922 $29,612 $48 8.9 TG Foundations $0 $1,147 $2,027 $0 $3,174 $299 $0 $1,042 $4,515 $7 SUBTOTAL 8. $56,963 $1,147 $16,993 $0 $75,103 $6,414 $0 $12,400 $93,917 $151 9.0 COOLING WATER SYSTEM 9.1 Cooling Towers $4,180 $0 $1,270 $0 $5,450 $508 $0 $894 $6,851 $11 9.2 Circulating Water Pumps $2,012 $0 $146 $0 $2,158 $184 $0 $351 $2,694 $4 9.3 Circ.Water System Auxiliaries $177 $0 $25 $0 $202 $19 $0 $33 $254 $0 9.4 Circ.Water Piping $0 $7,847 $1,901 $0 $9,747 $817 $0 $2,113 $12,678 $20 9.5 Make-up Water System $427 $0 $587 $0 $1,014 $94 $0 $222 $1,330 $2 9.6 Component Cooling Water Sys $897 $1,073 $737 $0 $2,707 $242 $0 $590 $3,538 $6 9.9 Circ.Water System Foundations $0 $2,576 $4,576 $0 $7,152 $675 $0 $2,348 $10,175 $16 SUBTOTAL 9. $7,693 $11,495 $9,242 $0 $28,431 $2,538 $0 $6,550 $37,519 $60

### Updated Costs (J une 2011 Basis)



# 10 Exhibit 4

-2 Case 1 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW

10.0 ASH/SPENT SORBENT HANDLING SYS 10.1 Slag Dewatering & Cooling $14,251 $7,859 $15,855 $0 $37,965 $3,574 $0 $4,154 $45,693 $73 10.2 Gasifier Ash Depressurization w/10.1 w/10.1 w/10.1 $0 $0 $0 $0 $0 $0 $0 10.3 Cleanup Ash Depressurization w/10.1 w/10.1 w/10.1 $0 $0 $0 $0 $0 $0 $0 10.4 High Temperature Ash Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.5 Other Ash Recovery Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.6 Ash Storage Silos $693 $0 $749 $0 $1,442 $137 $0 $237 $1,816 $3 10.7 Ash Transport & Feed Equipment $954 $0 $223 $0 $1,177 $105 $0 $192 $1,474 $2 10.8 Misc. Ash Handling Equipment $1,436 $1,760 $522 $0 $3,718 $344 $0 $609 $4,671 $8 10.9 Ash/Spent Sorbent Foundation $0 $58 $76 $0 $135 $13 $0 $44 $192 $0 SUBTOTAL 10. $17,335 $9,676 $17,426 $0 $44,437 $4,172 $0 $5,237 $53,846 $87 11.0 ACCESSORY ELECTRIC PLANT 11.1 Generator Equipment $1,165 $0 $1,134 $0 $2,299 $213 $0 $251 $2,764 $4 11.2 Station Service Equipment $4,600 $0 $423 $0 $5,023 $462 $0 $548 $6,033 $10 11.3 Switchgear & Motor Control $8,490 $0 $1,578 $0 $10,068 $931 $0 $1,650 $12,649 $20 11.4 Conduit & Cable Tray $0 $4,314 $13,297 $0 $17,610 $1,641 $0 $4,813 $24,064 $39 11.5 Wire & Cable $0 $8,317 $5,060 $0 $13,377 $908 $0 $3,571 $17,856 $29 11.6 Protective Equipment $0 $805 $2,988 $0 $3,793 $364 $0 $624 $4,781 $8 11.7 Standby Equipment $276 $0 $275 $0 $552 $52 $0 $91 $695 $1 11.8 Main Power Transformers $18,242 $0 $175 $0 $18,417 $1,394 $0 $2,972 $22,783 $37 11.9 Electrical Foundations $0 $183 $498 $0 $680 $64 $0 $223 $968 $2 SUBTOTAL 11. $32,773 $13,618 $25,428 $0 $71,819 $6,031 $0 $14,743 $92,592 $149 12.0 INSTRUMENTATION & CONTROL 12.1 IGCC Control Equipment w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 12.2 Combustion Turbine Control w/6.1 $0 w/6.1 $0 $0 $0 $0 $0 $0 $0 12.3 Steam Turbine Control w/8.1 $0 w/8.1 $0 $0 $0 $0 $0 $0 $0 12.4 Other Major Component Control $1,187 $0 $809 $0 $1,996 $187 $100 $342 $2,625 $4 12.5 Signal Processing Equipment w/12.7 $0 w/12.7 $0 $0 $0 $0 $0 $0 $0 12.6 Control Boards,Panels & Racks $273 $0 $178 $0 $451 $42 $23 $103 $619 $1 12.7 Computer & Accessories $6,333 $0 $207 $0 $6,539 $599 $327 $747 $8,212 $13 12.8 Instrument Wiring & Tubing $0 $2,438 $4,614 $0 $7,052 $571 $353 $1,994 $9,969 $16 12.9 Other I & C Equipment $4,233 $0 $2,097 $0 $6,330 $591 $317 $1,086 $8,324 $13 SUBTOTAL 12. $12,026 $2,438 $7,906 $0 $22,369 $1,991 $1,118 $4,272 $29,750 $48

### Updated Costs (J une 2011 Basis)



# 11 Exhibit 4

-2 Case 1 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW

13.0 IMPROVEMENTS TO SITE 13.1 Site Preparation $0 $118 $2,689 $0 $2,807 $274 $0 $924 $4,005 $6 13.2 Site Improvements $0 $2,103 $2,973 $0 $5,077 $504 $0 $1,674 $7,254 $12 13.3 Site Facilities $3,769 $0 $4,231 $0 $8,000 $796 $0 $2,639 $11,434 $18 SUBTOTAL 13. $3,769 $2,222 $9,893 $0 $15,884 $1,573 $0 $5,237 $22,693 $36 14.0 BUILDINGS & STRUCTURES 14.1 Combustion Turbine Area $0 $317 $179 $0 $496 $43 $0 $108 $647 $1 14.2 Steam Turbine Building $0 $2,930 $4,172 $0 $7,102 $640 $0 $1,161 $8,903 $14 14.3 Administration Building $0 $1,013 $734 $0 $1,747 $152 $0 $285 $2,184 $4 14.4 Circulation Water Pumphouse $0 $200 $106 $0 $305 $26 $0 $50 $381 $1 14.5 Water Treatment Buildings $0 $621 $605 $0 $1,226 $108 $0 $200 $1,535 $2 14.6 Machine Shop $0 $518 $354 $0 $873 $76 $0 $142 $1,091 $2 14.7 Warehouse $0 $837 $540 $0 $1,377 $119 $0 $224 $1,721 $3 14.8 Other Buildings & Structures $0 $501 $390 $0 $891 $78 $0 $194 $1,163 $2 14.9 Waste Treating Building & Str. $0 $1,121 $2,140 $0 $3,261 $298 $0 $712 $4,270 $7 SUBTOTAL 14. $0 $8,058 $9,221 $0 $17,278 $1,540 $0 $3,076 $21,894 $35

TOTAL COST $744,070 $88,612 $312,734 $0 $1,145,416 $104,330 $38,178 $199,959 $1,487,884 $2,392 Owner's Costs Preproduction Costs 6 Months All Labor $14,611 $23 1 Month Maintenance Materials $3,332 $5 1 Month Non-fuel Consumables $438 $1 1 Month Waste Disposal $471 $1 25% of 1 Months Fuel Cost at 100% CF $2,923 $5 2% of TPC $29,758 $48 Total $51,532 $83 Inventory Capital 60 day supply of fuel and consumables at 100% CF $23,910 $38 0.5% of TPC (spare parts) $7,439 $12 Total $31,350 $50
Initial Cost for Catalyst and Chemicals $12,171 $20 Land $900 $1 Other Owner's Costs $223,183 $359

Financing Costs $40,173 $65 Total Overnight Costs (TOC) $1,847,192 $2,969 TASC Multiplier (IOU, high-risk, 35 year) 1.140 Total As-Spent Cost (TASC) $2,105,799 $3,385

### Updated Costs (J une 2011 Basis)



# 12 Exhibit 4
-3 Case 1 O&M costs

INITIAL & ANNUAL O&M EXPENSES Cost Base (Jun): 2011 Case 1 - GEE Radiant 640MW IGCC w/o CO2 Heat Rate-net (Btu/kWh): 8,756 MWe-net: 622 Capacity Factor (%): 80 OPERATING & MAINTENANCE LABOR Operating Labor Operating Labor Rate (base): 39.70 $/hour Operating Labor Burden: 30.00 % of base Labor O-H Charge Rate: 25.00 % of labor

Total Operating Labor Requirements(O.J.)per Shift: 1 unit/mod. Plant Skilled Operator 2.0 2.0 Operator 9.0 9.0 Foreman 1.0 1.0 Lab Tech's, etc. 3.0 3.0 TOTAL-O.J.'s 15.0 15.0 Annual Cost Annual Unit Cost $ $/kW-net Annual Operating Labor Cost $6,781,554 $10.902 Maintenance Labor Cost $16,596,147 $26.680 Administrative & Support Labor $5,844,425 $9.395 Property Taxes and Insurance $29,757,674 $47.838 TOTAL FIXED OPERATING COSTS $58,979,801 $94.815 VARIABLE OPERATING COSTS $/kWh-net Maintenance Material Cost $31,985,668 $0.00734

Consumables Consumption Unit Initial Fill Initial Fill /Day Cost Cost
Water (/1000 gallons) 0 3,409 1.67 $0 $1,666,439 $0.00038

Chemicals

MU & WT Chem. (lbs) 0 20,311 0.27 $0 $1,588,505 $0.00036 Carbon (Mercury Removal) (lb) 54,833 75 1.63 $89,117 $35,647 $0.00001 COS Catalyst (m3) 422 0.29 3,751.70 $1,583,048 $316,610 $0.00007 Water Gas Shift Catalyst (ft3) 0 0 771.99 $0 $0 $0.00000 Selexol Solution (gal) 285,358 45 36.79 $10,498,674 $483,183 $0.00011 SCR Catalyst (m3) 0 0 0.00 $0 $0 $0.00000 Ammonia (19% NH3) (ton) 0 0 0.00 $0 $0 $0.00000 Claus Catalyst (ft3) w/equip. 1.94 203.15 $0 $115,176 $0.00003 Subtotal Chemicals $12,170,838 $2,539,121 $0.00058

Other

Supplemental Fuel (MBtu) 0 0 0.00 $0 $0 $0.00000 Gases, N2 etc. (/100scf) 0 0 0.00 $0 $0 $0.00000 L.P. Steam (/1000 pounds) 0 0 0.00 $0 $0 $0.00000 Subtotal Other $0 $0 $0.00000

Waste Disposal

Spent Mercury Catalyst (lb.) 0 75 0.65 $0 $14,259 $0.00000 Flyash (ton) 0 0 0.00 $0 $0 $0.00000 Slag (ton) 0 615 25.11 $0 $4,507,216 $0.00103 Subtotal-Waste Disposal $0 $4,521,475 $0.00104

By-products & Emissions

Sulfur (tons) 0 140 0.00 $0 $0 $0.00000 Subtotal By-Products $0 $0 $0.00000

TOTAL VARIABLE OPERATING COSTS $12,170,838 $40,712,702 $0.00934

Fuel (ton) 0 5,603 68.60 $0 $112,231,098 $0.02575

### Updated Costs (J une 2011 Basis)



# 13 Exhibit 4
-4 Case 2 Capital and owner’s costs

Client: USDOE/NETL Report Date: 2011-Oct-17 Project: Bituminous Baseline Study

Case: Case 2 GEE Radiant 550MW IGCC w/ CO2 Plant Size: 543.3 MW,net Estimate Type: Conceptual Cost Base (Jun) 2011 ($x1000) Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW

1.0 COAL & SORBENT HANDLING 1.1 Coal Receive & Unload $4,552 $0 $2,194 $0 $6,746 $586 $0 $1,467 $8,799 $16 1.2 Coal Stackout & Reclaim $5,883 $0 $1,407 $0 $7,289 $619 $0 $1,582 $9,489 $17 1.3 Coal Conveyors & Yd Crush $5,469 $0 $1,392 $0 $6,861 $583 $0 $1,489 $8,933 $16 1.4 Other Coal Handling $1,431 $0 $322 $0 $1,753 $149 $0 $380 $2,282 $4 1.5 Sorbent Receive & Unload $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.6 Sorbent Stackout & Reclaim $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.7 Sorbent Conveyors $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.8 Other Sorbent Handling $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.9 Coal & Sorbent Hnd.Foundations $0 $3,040 $7,944 $0 $10,984 $1,044 $0 $2,406 $14,434 $27 SUBTOTAL 1. $17,335 $3,040 $13,259 $0 $33,633 $2,981 $0 $7,323 $43,937 $81 2.0 COAL & SORBENT PREP & FEED 2.1 Coal Crushing & Drying w/2.3 $0 w/2.3 $0 $0 $0 $0 $0 $0 $0 2.2 Prepared Coal Storage & Feed $1,944 $467 $301 $0 $2,712 $224 $0 $587 $3,524 $6 2.3 Slurry Prep & Feed $26,551 $0 $11,574 $0 $38,125 $3,363 $1,906 $8,679 $52,074 $96 2.4 Misc.Coal Prep & Feed $1,069 $781 $2,301 $0 $4,151 $371 $0 $904 $5,427 $10 2.5 Sorbent Prep Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.6 Sorbent Storage & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.7 Sorbent Injection System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.8 Booster Air Supply System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.9 Coal & Sorbent Feed Foundation $0 $3,922 $3,365 $0 $7,287 $677 $0 $1,593 $9,557 $18 SUBTOTAL 2. $29,565 $5,170 $17,541 $0 $52,275 $4,636 $1,906 $11,763 $70,581 $130 3.0 FEEDWATER & MISC. BOP SYSTEMS 3.1 Feedwater System $3,402 $5,871 $3,078 $0 $12,350 $1,116 $0 $2,693 $16,159 $30 3.2 Water Makeup & Pretreating $874 $90 $480 $0 $1,445 $133 $0 $473 $2,051 $4 3.3 Other Feedwater Subsystems $1,912 $632 $565 $0 $3,109 $268 $0 $676 $4,053 $7 3.4 Service Water Systems $511 $1,019 $3,513 $0 $5,043 $479 $0 $1,657 $7,179 $13 3.5 Other Boiler Plant Systems $2,754 $1,029 $2,533 $0 $6,317 $575 $0 $1,378 $8,271 $15 3.6 FO Supply Sys & Nat Gas $380 $718 $665 $0 $1,764 $166 $0 $386 $2,315 $4 3.7 Waste Treatment Equipment $1,182 $0 $732 $0 $1,915 $184 $0 $630 $2,729 $5 3.8 Misc. Power Plant Equipment $1,326 $177 $689 $0 $2,192 $209 $0 $720 $3,122 $6 SUBTOTAL 3. $12,342 $9,537 $12,256 $0 $34,135 $3,132 $0 $8,613 $45,880 $84 4.0 GASIFIER & ACCESSORIES 4.1 Syngas Cooler Gasifier System $140,247 $0 $77,259 $0 $217,505 $19,596 $30,249 $40,970 $308,320 $568 4.2 Syngas Cooler (w/ Gasifier - $) w/4.1 $0 w/ 4.1 $0 $0 $0 $0 $0 $0 $0 4.3 ASU/Oxidant Compression $234,789 $0 w/equip. $0 $234,789 $21,939 $0 $25,673 $282,400 $520 4.4 Scrubber & Low Temperature Cooling $7,292 $5,935 $6,136 $0 $19,363 $1,812 $0 $4,235 $25,411 $47 4.5 Black Water & Sour Gas Section w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.6 Soot Recovery & SARU $2,224 $1,056 $2,073 $0 $5,353 $503 $0 $1,171 $7,027 $13 4.8 Major Component Rigging w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.9 Gasification Foundations $0 $7,429 $6,482 $0 $13,911 $1,293 $0 $3,801 $19,005 $35 SUBTOTAL 4. $384,551 $14,421 $91,949 $0 $490,922 $45,143 $30,249 $75,850 $642,163 $1,182 

### TOTAL PLANT COST SUMMARY

### Updated Costs (J une 2011 Basis)



# 14 Exhibit 4
-4 Case 2 Capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 5A GAS CLEANUP & PIPING 5A.1 Double Stage Selexol $89,360 $0 $75,307 $0 $164,667 $15,537 $32,933 $42,627 $255,765 $471 5A.2 Elemental Sulfur Plant $12,451 $2,427 $15,955 $0 $30,833 $2,928 $0 $6,752 $40,513 $75 5A.3 Mercury Removal $1,659 $0 $1,254 $0 $2,913 $274 $146 $667 $3,999 $7 5A.4 Shift Reactors $11,566 $0 $4,624 $0 $16,190 $1,513 $0 $3,540 $21,243 $39 5A.5 Particulate Removal $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.6 Blowback Gas Systems $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.7 Fuel Gas Piping $0 $812 $531 $0 $1,344 $117 $0 $292 $1,753 $3 5A.9 HGCU Foundations $0 $735 $495 $0 $1,231 $114 $0 $403 $1,748 $3 SUBTOTAL 5A. $115,036 $3,974 $98,166 $0 $217,177 $20,483 $33,079 $54,282 $325,021 $598 5B CO2 COMPRESSION 5B.1 CO2 Removal System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5B.2 CO2 Compression & Drying $37,921 $0 $13,398 $0 $51,319 $4,788 $0 $11,221 $67,328 $124 SUBTOTAL 5B. $37,921 $0 $13,398 $0 $51,319 $4,788 $0 $11,221 $67,328 $124 6.0 COMBUSTION TURBINE/ACCESSORIES 6.1 Combustion Turbine Generator $111,210 $0 $7,881 $0 $119,091 $10,985 $11,909 $14,199 $156,184 $287 6.2 Syngas Expander $6,690 $0 $918 $0 $7,608 $704 $0 $1,247 $9,559 $18 6.3 Compressed Air Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.9 Combustion Turbine Foundations $0 $1,016 $1,175 $0 $2,191 $205 $0 $719 $3,115 $6 SUBTOTAL 6. $117,900 $1,016 $9,975 $0 $128,891 $11,894 $11,909 $16,164 $168,858 $311 7.0 HRSG, DUCTING & STACK 7.1 Heat Recovery Steam Generator $29,560 $0 $5,723 $0 $35,283 $3,273 $0 $3,856 $42,412 $78 7.2 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7.3 Ductwork $0 $2,109 $1,478 $0 $3,587 $305 $0 $778 $4,671 $9 7.4 Stack $4,070 $0 $1,519 $0 $5,589 $522 $0 $611 $6,721 $12 7.9 HRSG, Duct & Stack Foundations $0 $775 $778 $0 $1,553 $145 $0 $509 $2,207 $4 SUBTOTAL 7. $33,630 $2,884 $9,498 $0 $46,012 $4,244 $0 $5,754 $56,010 $103 8.0 STEAM TURBINE GENERATOR 8.1 Steam TG & Accessories $36,590 $0 $5,756 $0 $42,346 $3,730 $0 $4,608 $50,683 $93 8.2 Turbine Plant Auxiliaries $235 $0 $535 $0 $770 $74 $0 $84 $929 $2 8.3 Condenser & Auxiliaries $3,280 $0 $1,716 $0 $4,996 $468 $0 $546 $6,010 $11 8.4 Steam Piping $15,064 $0 $6,533 $0 $21,597 $1,652 $0 $5,812 $29,061 $53 8.9 TG Foundations $0 $1,108 $1,958 $0 $3,066 $289 $0 $1,007 $4,362 $8 SUBTOTAL 8. $55,169 $1,108 $16,498 $0 $72,775 $6,213 $0 $12,057 $91,045 $168 9.0 COOLING WATER SYSTEM 9.1 Cooling Towers $4,470 $0 $1,350 $0 $5,820 $542 $0 $954 $7,316 $13 9.2 Circulating Water Pumps $2,150 $0 $161 $0 $2,311 $197 $0 $376 $2,884 $5 9.3 Circ.Water System Auxiliaries $187 $0 $27 $0 $214 $20 $0 $35 $269 $0 9.4 Circ.Water Piping $0 $8,304 $2,012 $0 $10,316 $865 $0 $2,236 $13,417 $25 9.5 Make-up Water System $483 $0 $664 $0 $1,147 $106 $0 $251 $1,504 $3 9.6 Component Cooling Water Sys $949 $1,136 $780 $0 $2,865 $256 $0 $624 $3,745 $7 9.9 Circ.Water System Foundations $0 $2,725 $4,842 $0 $7,567 $714 $0 $2,484 $10,766 $20 SUBTOTAL 9. $8,240 $12,165 $9,835 $0 $30,240 $2,700 $0 $6,961 $39,900 $73

### Updated Costs (J une 2011 Basis)



# 15 Exhibit 4
-4 Case 2 Capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW

10.0 ASH/SPENT SORBENT HANDLING SYS 10.1 Slag Dewatering & Cooling $14,630 $8,068 $16,277 $0 $38,975 $3,669 $0 $4,264 $46,909 $86 10.2 Gasifier Ash Depressurization w/10.1 w/10.1 w/10.1 $0 $0 $0 $0 $0 $0 $0 10.3 Cleanup Ash Depressurization w/10.1 w/10.1 w/10.1 $0 $0 $0 $0 $0 $0 $0 10.4 High Temperature Ash Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.5 Other Ash Recovery Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.6 Ash Storage Silos $710 $0 $767 $0 $1,476 $140 $0 $242 $1,859 $3 10.7 Ash Transport & Feed Equipment $977 $0 $228 $0 $1,205 $107 $0 $197 $1,509 $3 10.8 Misc. Ash Handling Equipment $1,470 $1,801 $534 $0 $3,806 $353 $0 $624 $4,782 $9 10.9 Ash/Spent Sorbent Foundation $0 $60 $78 $0 $138 $13 $0 $45 $196 $0 SUBTOTAL 10. $17,787 $9,928 $17,885 $0 $45,600 $4,282 $0 $5,373 $55,254 $102 11.0 ACCESSORY ELECTRIC PLANT 11.1 Generator Equipment $1,152 $0 $1,122 $0 $2,274 $211 $0 $249 $2,734 $5 11.2 Station Service Equipment $5,512 $0 $507 $0 $6,019 $553 $0 $657 $7,229 $13 11.3 Switchgear & Motor Control $10,173 $0 $1,891 $0 $12,064 $1,116 $0 $1,977 $15,157 $28 11.4 Conduit & Cable Tray $0 $5,169 $15,934 $0 $21,103 $1,967 $0 $5,767 $28,836 $53 11.5 Wire & Cable $0 $9,966 $6,063 $0 $16,030 $1,088 $0 $4,279 $21,397 $39 11.6 Protective Equipment $0 $805 $2,988 $0 $3,793 $364 $0 $624 $4,781 $9 11.7 Standby Equipment $274 $0 $273 $0 $547 $52 $0 $90 $688 $1 11.8 Main Power Transformers $20,126 $0 $172 $0 $20,299 $1,536 $0 $3,275 $25,110 $46 11.9 Electrical Foundations $0 $180 $491 $0 $672 $64 $0 $221 $956 $2 SUBTOTAL 11. $37,238 $16,120 $29,442 $0 $82,800 $6,951 $0 $17,139 $106,889 $197 12.0 INSTRUMENTATION & CONTROL 12.1 IGCC Control Equipment w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 12.2 Combustion Turbine Control w/6.1 $0 w/6.1 $0 $0 $0 $0 $0 $0 $0 12.3 Steam Turbine Control w/8.1 $0 w/8.1 $0 $0 $0 $0 $0 $0 $0 12.4 Other Major Component Control $1,321 $0 $900 $0 $2,221 $208 $111 $381 $2,921 $5 12.5 Signal Processing Equipment w/12.7 $0 w/12.7 $0 $0 $0 $0 $0 $0 $0 12.6 Control Boards,Panels & Racks $304 $0 $199 $0 $502 $47 $25 $115 $689 $1 12.7 Computer & Accessories $7,046 $0 $230 $0 $7,276 $667 $364 $831 $9,138 $17 12.8 Instrument Wiring & Tubing $0 $2,712 $5,134 $0 $7,847 $635 $392 $2,219 $11,093 $20 12.9 Other I & C Equipment $4,710 $0 $2,334 $0 $7,044 $658 $352 $1,208 $9,262 $17 SUBTOTAL 12. $13,381 $2,712 $8,797 $0 $24,890 $2,215 $1,245 $4,753 $33,103 $61

### Updated Costs (J une 2011 Basis)



# 16 Exhibit 4
-4 Case 2 Capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW

13.0 IMPROVEMENTS TO SITE 13.1 Site Preparation $0 $123 $2,798 $0 $2,921 $285 $0 $962 $4,168 $8 13.2 Site Improvements $0 $2,189 $3,095 $0 $5,284 $524 $0 $1,742 $7,550 $14 13.3 Site Facilities $3,923 $0 $4,403 $0 $8,326 $828 $0 $2,746 $11,900 $22 SUBTOTAL 13. $3,923 $2,312 $10,296 $0 $16,531 $1,637 $0 $5,450 $23,618 $43 14.0 BUILDINGS & STRUCTURES 14.1 Combustion Turbine Area $0 $317 $179 $0 $496 $43 $0 $108 $647 $1 14.2 Steam Turbine Building $0 $2,848 $4,055 $0 $6,903 $622 $0 $1,129 $8,653 $16 14.3 Administration Building $0 $1,057 $766 $0 $1,823 $159 $0 $297 $2,279 $4 14.4 Circulation Water Pumphouse $0 $198 $105 $0 $303 $26 $0 $49 $379 $1 14.5 Water Treatment Buildings $0 $718 $700 $0 $1,419 $125 $0 $232 $1,776 $3 14.6 Machine Shop $0 $541 $370 $0 $911 $79 $0 $149 $1,139 $2 14.7 Warehouse $0 $873 $563 $0 $1,437 $125 $0 $234 $1,796 $3 14.8 Other Buildings & Structures $0 $523 $407 $0 $930 $81 $0 $202 $1,214 $2 14.9 Waste Treating Building & Str. $0 $1,169 $2,233 $0 $3,403 $311 $0 $743 $4,456 $8 SUBTOTAL 14. $0 $8,246 $9,379 $0 $17,625 $1,571 $0 $3,142 $22,338 $41

TOTAL COST $884,018 $92,633 $368,172 $0 $1,344,824 $122,868 $78,388 $245,847 $1,791,927 $3,299 

### Owner's Costs Preproduction Costs 6 Months All Labor $16,212 $30 1 Month Maintenance Materials $3,661 $7 1 Month Non-fuel Consumables $641 $1 1 Month Waste Disposal $492 $1 25% of 1 Months Fuel Cost at 100% CF $3,049 $6 2% of TPC $35,839 $66 Total $59,892 $110 Inventory Capital 60 day supply of fuel and consumables at 100% CF $25,244 $46 0.5% of TPC (spare parts) $8,960 $16 Total $34,204 $63

Initial Cost for Catalyst and Chemicals $15,934 $29 Land $900 $2 Other Owner's Costs $268,789 $495

Financing Costs $48,382 $89 

### Total Overnight Costs (TOC) $2,220,028 $4,086 TASC Multiplier (IOU, high-risk, 35 year) 1.140 

### Total As-Spent Cost (TASC) $2,530,832 $4,658

### Updated Costs (J une 2011 Basis)



# 17 Exhibit 4
-5 Case 2 O&M costs INITIAL & ANNUAL O&M EXPENSES Cost Base (Jun): 2011 Case 2 - GEE Radiant 550MW IGCC w/ CO2 Heat Rate-net (Btu/kWh): 10,458 MWe-net: 543 Capacity Factor (%): 80 OPERATING & MAINTENANCE LABOR Operating Labor Operating Labor Rate (base): 39.70 $/hour Operating Labor Burden: 30.00 % of base Labor O-H Charge Rate: 25.00 % of labor

Total Operating Labor Requirements(O.J.)per 1 unit/mod. Plant Skilled Operator 2.0 2.0 Operator 10.0 10.0 Foreman 1.0 1.0 Lab Tech's, etc. 3.0 3.0 TOTAL-O.J.'s 16.0 16.0 Annual Cost Annual Unit Cost $ $/kW-net Annual Operating Labor Cost $7,233,658 $13.316 Maintenance Labor Cost $18,705,024 $34.432 Administrative & Support Labor $6,484,670 $11.937 Property Taxes and Insurance $35,838,534 $65.971 TOTAL FIXED OPERATING COSTS $68,261,886 $125.655 VARIABLE OPERATING COSTS $/kWh-net Maintenance Material Cost $35,141,270 $0.00923

Consumables Consumption Unit Initial Fill Initial Fill /Day Cost Cost
Water (/1000 gallons) 0 4,187 1.67 $0 $2,046,534 $0.00054

Chemicals

MU & WT Chem. (lbs) 0 24,944 0.27 $0 $1,950,825 $0.00051 Carbon (Mercury Removal) (lb) 79,786 109 1.63 $129,671 $51,869 $0.00001 COS Catalyst (m3) 0 0 3,751.70 $0 $0 $0.00000 Water Gas Shift Catalyst (ft3) 6,246 4.28 771.99 $4,822,078 $964,416 $0.00025 Selexol Solution (gal) 298,502 95 36.79 $10,982,258 $1,020,455 $0.00027 SCR Catalyst (m3) 0 0 0.00 $0 $0 $0.00000 Ammonia (19% NH3) (ton) 0 0 0.00 $0 $0 $0.00000 Claus Catalyst (ft3) w/equip 2.01 203.15 $0 $119,488 $0.00003 Subtotal-Chemicals $15,934,007 $4,107,052 $0.00108

Other

Supplemental Fuel (MBtu) 0 0 0.00 $0 $0 $0.00000 Gases, N2 etc. (/100scf) 0 0 0.00 $0 $0 $0.00000 L.P. Steam (/1000 pounds) 0 0 0.00 $0 $0 $0.00000 Subtotal-Other $0 $0 $0.00000

Waste Disposal

Spent Mercury Catalyst (lb.) 0 109 0.65 $0 $20,747 $0.00001 Flyash (ton) 0 0 0.00 $0 $0 $0.00000 Slag (ton) 0 641 25.11 $0 $4,701,344 $0.00123

Subtotal Waste Disposal $0 $4,722,091 $0.00124

By-products & Emissions 0 0 0.00 $0 $0.00000

Sulfur (ton) 0 146 0.00 $0 $0 $0.00000 Subtotal By-products $0 $0 $0.00000

TOTAL VARIABLE OPERATING COSTS $15,934,007 $46,016,948 $0.01209

Fuel (ton) 0 5,844 68.60 $0 $117,064,944 $0.03075

### Updated Costs (J une 2011 Basis)



# 18 Exhibit 4
-6 Case 9 capital and owner’s costs

Client: USDOE/NETL Report Date: 2012-Jun-12 Project: Bituminous Baseline Study

Case: Case 9 1x550 MWnet SubCritical PC Plant Size: 550.1 MW,net Estimate Type: Cost Base (Jun) 2011 ($x1000) Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 1 COAL & SORBENT HANDLING 1.1 Coal Receive & Unload $4,258 $0 $1,918 $0 $6,177 $535 $0 $1,007 $7,719 $14 1.2 Coal Stackout & Reclaim $5,503 $0 $1,230 $0 $6,733 $570 $0 $1,096 $8,399 $15 1.3 Coal Conveyors $5,117 $0 $1,217 $0 $6,333 $537 $0 $1,031 $7,901 $14 1.4 Other Coal Handling $1,339 $0 $282 $0 $1,620 $137 $0 $264 $2,021 $4 1.5 Sorbent Receive & Unload $171 $0 $51 $0 $221 $19 $0 $36 $276 $1 1.6 Sorbent Stackout & Reclaim $2,755 $0 $498 $0 $3,253 $274 $0 $529 $4,056 $7 1.7 Sorbent Conveyors $983 $213 $238 $0 $1,434 $120 $0 $233 $1,787 $3 1.8 Other Sorbent Handling $594 $140 $307 $0 $1,041 $89 $0 $169 $1,299 $2 1.9 Coal & Sorbent Hnd.Foundations $0 $4,935 $6,507 $0 $11,442 $1,073 $0 $1,877 $14,393 $26 SUBTOTAL 1. $20,719 $5,288 $12,247 $0 $38,254 $3,355 $0 $6,241 $47,851 $87 2 COAL & SORBENT PREP & FEED 2.1 Coal Crushing & Drying $2,445 $0 $470 $0 $2,915 $246 $0 $474 $3,636 $7 2.2 Coal Conveyor to Storage $6,261 $0 $1,348 $0 $7,609 $644 $0 $1,238 $9,491 $17 2.3 Coal Injection System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.4 Misc.Coal Prep & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.5 Sorbent Prep Equipment $4,682 $203 $959 $0 $5,843 $492 $0 $950 $7,286 $13 2.6 Sorbent Storage & Feed $564 $0 $213 $0 $777 $67 $0 $127 $971 $2 2.7 Sorbent Injection System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.8 Booster Air Supply System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.9 Coal & Sorbent Feed Foundation $0 $571 $501 $0 $1,073 $100 $0 $176 $1,348 $2 SUBTOTAL 2. $13,952 $774 $3,491 $0 $18,218 $1,549 $0 $2,965 $22,732 $41 3 FEEDWATER & MISC. BOP SYSTEMS 3.1 Feedwater System $19,500 $0 $6,718 $0 $26,218 $2,245 $0 $4,270 $32,733 $60 3.2 Water Makeup & Pretreating $5,788 $0 $1,831 $0 $7,619 $696 $0 $1,663 $9,978 $18 3.3 Other Feedwater Subsystems $6,555 $0 $2,691 $0 $9,246 $795 $0 $1,506 $11,547 $21 3.4 Service Water Systems $1,159 $0 $607 $0 $1,766 $159 $0 $385 $2,309 $4 3.5 Other Boiler Plant Systems $7,825 $0 $7,398 $0 $15,223 $1,385 $0 $2,491 $19,099 $35 3.6 FO Supply Sys & Nat Gas $328 $0 $383 $0 $710 $64 $0 $116 $890 $2 3.7 Waste Treatment Equipment $3,797 $0 $2,198 $0 $5,996 $577 $0 $1,315 $7,887 $14 3.8 Misc. Equip.(cranes,AirComp.,Comm.) $3,210 $0 $993 $0 $4,203 $400 $0 $921 $5,523 $10 SUBTOTAL 3. $48,162 $0 $22,819 $0 $70,981 $6,320 $0 $12,666 $89,967 $164 4 PC BOILER & ACCESSORIES 4.1 PC Boiler & Accessories $158,957 $0 $103,808 $0 $262,765 $25,303 $0 $28,807 $316,875 $576 4.2 SCR (w/4.1) $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.3 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.4 Boiler BoP (w/ ID Fans) $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.5 Primary Air System w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.6 Secondary Air System w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.8 Major Component Rigging $0 w/4.1 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.9 Boiler Foundations $0 w/14.1 w/14.1 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 4. $158,957 $0 $103,808 $0 $262,765 $25,303 $0 $28,807 $316,875 $576 

### TOTAL PLANT COST SUMMARY

### Updated Costs (J une 2011 Basis)



# 19 Exhibit 4
-6 Case 9 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 5 FLUE GAS CLEANUP 5.1 Absorber Vessels & Accessories $70,355 $0 $15,042 $0 $85,398 $7,928 $0 $9,333 $102,658 $187 5.2 Other FGD $3,671 $0 $4,132 $0 $7,804 $739 $0 $854 $9,397 $17 5.3 Bag House & Accessories $19,882 $0 $12,531 $0 $32,413 $3,046 $0 $3,546 $39,005 $71 5.4 Other Particulate Removal Materials $1,345 $0 $1,430 $0 $2,775 $263 $0 $304 $3,342 $6 5.5 Gypsum Dewatering System $5,766 $0 $973 $0 $6,738 $624 $0 $736 $8,099 $15 5.6 Mercury Removal System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5.9 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 5. $101,020 $0 $34,108 $0 $135,128 $12,600 $0 $14,773 $162,502 $295 5B CO2REMOVAL & COMPRESSION 5B.1 CO2Removal System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5B.2 CO2Compression & Drying $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 5B. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6 COMBUSTION TURBINE/ACCESSORIES 6.1 Combustion Turbine Generator N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 6.2 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.3 Compressed Air Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.9 Combustion Turbine Foundations $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 6. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7 HRSG, DUCTING & STACK 7.1 Heat Recovery Steam Generator N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 7.2 HRSG Accessories $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7.3 Ductwork $11,086 $0 $6,998 $0 $18,084 $1,528 $0 $2,942 $22,553 $41 7.4 Stack $11,025 $0 $6,407 $0 $17,431 $1,636 $0 $1,907 $20,974 $38 7.9 Duct & Stack Foundations $0 $1,202 $1,427 $0 $2,629 $246 $0 $575 $3,450 $6 SUBTOTAL 7. $22,111 $1,202 $14,832 $0 $38,144 $3,410 $0 $5,423 $46,977 $85 8 STEAM TURBINE GENERATOR 8.1 Steam TG & Accessories $64,429 $0 $7,474 $0 $71,902 $6,308 $0 $7,821 $86,031 $156 8.2 Turbine Plant Auxiliaries $420 $0 $893 $0 $1,312 $125 $0 $144 $1,582 $3 8.3 Condenser & Auxiliaries $8,741 $0 $2,747 $0 $11,488 $1,070 $0 $1,256 $13,814 $25 8.4 Steam Piping $21,266 $0 $9,448 $0 $30,714 $2,354 $0 $4,960 $38,028 $69 8.9 TG Foundations $0 $1,251 $2,066 $0 $3,317 $313 $0 $726 $4,356 $8 SUBTOTAL 8. $94,855 $1,251 $22,628 $0 $118,734 $10,170 $0 $14,907 $143,811 $261 9 COOLING WATER SYSTEM 9.1 Cooling Towers $11,793 $0 $3,647 $0 $15,440 $1,438 $0 $1,688 $18,566 $34 9.2 Circulating Water Pumps $2,356 $0 $154 $0 $2,509 $214 $0 $272 $2,995 $5 9.3 Circ.Water System Auxiliaries $640 $0 $85 $0 $725 $67 $0 $79 $871 $2 9.4 Circ.Water Piping $0 $5,395 $4,885 $0 $10,280 $910 $0 $1,678 $12,868 $23 9.5 Make-up Water System $575 $0 $739 $0 $1,315 $121 $0 $215 $1,652 $3 9.6 Component Cooling Water Sys $522 $0 $401 $0 $923 $84 $0 $151 $1,158 $2 9.9 Circ.Water System Foundations & Structures $0 $2,863 $4,755 $0 $7,618 $718 $0 $1,667 $10,003 $18 SUBTOTAL 9. $15,886 $8,258 $14,666 $0 $38,810 $3,552 $0 $5,752 $48,114 $87

### Updated Costs (J une 2011 Basis)



# 20 Exhibit 4
-6 Case 9 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 10 ASH/SPENT SORBENT HANDLING SYS 10.1 Ash Coolers N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.2 Cyclone Ash Letdown N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.3 HGCU Ash Letdown N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.4 High Temperature Ash Piping N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.5 Other Ash Recovery Equipment N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.6 Ash Storage Silos $738 $0 $2,257 $0 $2,995 $287 $0 $328 $3,611 $7 10.7 Ash Transport & Feed Equipment $4,900 $0 $4,858 $0 $9,758 $899 $0 $1,066 $11,723 $21 10.8 Misc. Ash Handling Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.9 Ash/Spent Sorbent Foundation $0 $167 $205 $0 $372 $35 $0 $81 $488 $1 SUBTOTAL 10. $5,638 $167 $7,320 $0 $13,125 $1,221 $0 $1,475 $15,821 $29 11 ACCESSORY ELECTRIC PLANT 11.1 Generator Equipment $1,948 $0 $311 $0 $2,259 $202 $0 $185 $2,646 $5 11.2 Station Service Equipment $3,408 $0 $1,142 $0 $4,550 $423 $0 $373 $5,346 $10 11.3 Switchgear & Motor Control $3,911 $0 $679 $0 $4,591 $424 $0 $502 $5,517 $10 11.4 Conduit & Cable Tray $0 $2,682 $8,666 $0 $11,348 $1,059 $0 $1,861 $14,268 $26 11.5 Wire & Cable $0 $5,107 $9,129 $0 $14,236 $1,143 $0 $2,307 $17,686 $32 11.6 Protective Equipment $317 $0 $1,099 $0 $1,416 $136 $0 $155 $1,707 $3 11.7 Standby Equipment $1,501 $0 $35 $0 $1,536 $141 $0 $168 $1,844 $3 11.8 Main Power Transformers $9,993 $0 $206 $0 $10,200 $775 $0 $1,097 $12,072 $22 11.9 Electrical Foundations $0 $360 $916 $0 $1,276 $121 $0 $279 $1,676 $3 SUBTOTAL 11. $21,078 $8,149 $22,184 $0 $51,411 $4,424 $0 $6,927 $62,762 $114 12 INSTRUMENTATION & CONTROL 12.1 PC Control Equipment w/12.7 $0 w/12.7 $0 $0 $0 $0 $0 $0 $0 12.2 Combustion Turbine Control N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 12.3 Steam Turbine Control w/8.1 $0 w/8.1 $0 $0 $0 $0 $0 $0 $0 12.4 Other Major Component Control $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 12.5 Signal Processing Equipment w/12.7 $0 w/12.7 $0 $0 $0 $0 $0 $0 $0 12.6 Control Boards,Panels & Racks $524 $0 $320 $0 $844 $79 $0 $138 $1,061 $2 12.7 Distributed Control System Equipment $5,285 $0 $942 $0 $6,228 $575 $0 $680 $7,483 $14 12.8 Instrument Wiring & Tubing $3,187 $0 $5,799 $0 $8,986 $728 $0 $1,457 $11,171 $20 12.9 Other I & C Equipment $1,493 $0 $3,458 $0 $4,952 $473 $0 $542 $5,967 $11 SUBTOTAL 12. $10,489 $0 $10,520 $0 $21,009 $1,855 $0 $2,818 $25,682 $47

### Updated Costs (J une 2011 Basis)



# 21 Exhibit 4
-6 Case 9 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 13 IMPROVEMENTS TO SITE 13.1 Site Preparation $0 $56 $1,197 $0 $1,253 $122 $0 $275 $1,651 $3 13.2 Site Improvements $0 $1,868 $2,468 $0 $4,336 $430 $0 $953 $5,720 $10 13.3 Site Facilities $3,348 $0 $3,512 $0 $6,860 $683 $0 $1,508 $9,051 $16 SUBTOTAL 13. $3,348 $1,924 $7,177 $0 $12,449 $1,235 $0 $2,737 $16,422 $30 14 BUILDINGS & STRUCTURES 14.1 Boiler Building $0 $10,206 $8,969 $0 $19,175 $1,687 $0 $5,216 $26,078 $47 14.2 Turbine Building $0 $14,749 $13,737 $0 $28,485 $2,513 $0 $7,750 $38,749 $70 14.3 Administration Building $0 $703 $743 $0 $1,447 $128 $0 $394 $1,969 $4 14.4 Circulation Water Pumphouse $0 $202 $160 $0 $362 $32 $0 $98 $492 $1 14.5 Water Treatment Buildings $0 $722 $658 $0 $1,380 $122 $0 $375 $1,877 $3 14.6 Machine Shop $0 $470 $316 $0 $786 $68 $0 $214 $1,068 $2 14.7 Warehouse $0 $319 $320 $0 $638 $57 $0 $174 $869 $2 14.8 Other Buildings & Structures $0 $260 $222 $0 $482 $42 $0 $131 $656 $1 14.9 Waste Treating Building & Str. $0 $499 $1,513 $0 $2,011 $187 $0 $550 $2,748 $5 SUBTOTAL 14. $0 $28,131 $26,637 $0 $54,767 $4,836 $0 $14,901 $74,504 $135

TOTAL COST $516,214 $55,144 $302,437 $0 $873,796 $79,833 $0 $120,392 $1,074,020 $1,953 

### Owner's Costs Preproduction Costs 6 Months All Labor $8,335 $15 1 Month Maintenance Materials $1,030 $2 1 Month Non-fuel Consumables $1,786 $3 1 Month Waste Disposal $389 $1 25% of 1 Months Fuel Cost at 100% CF $2,738 $5 2% of TPC $21,480 $39 Total $35,759 $65 Inventory Capital 60 day supply of fuel and consumables at 100% CF $25,041 $46 0.5% of TPC (spare parts) $5,370 $10 Total $30,411 $55
Initial Cost for Catalyst and Chemicals $0 $0 Land $900 $2 Other Owner's Costs $161,103 $293

Financing Costs $28,999 $53 

### Total Overnight Costs (TOC) $1,331,191 $2,420 TASC Multiplier (IOU, low-risk, 35 year) 1.134 

### Total As-Spent Cost (TASC) $1,509,571 $2,744

### Updated Costs (J une 2011 Basis)



# 22 Exhibit 4
-7 Case 9 O&M costs

INITIAL & ANNUAL O&M EXPENSES Cost Base (Jun): 2011 Case 9 - 1x550 MWnet SubCritical PC Heat Rate-net (Btu/kWh): 9,276 MWe-net: 550 Capacity Factor (%): 85 OPERATING & MAINTENANCE LABOR Operating Labor Operating Labor Rate (base): 39.70 $/hour Operating Labor Burden: 30.00 % of base Labor O-H Charge Rate: 25.00 % of labor

Total Operating Labor Requirements(O.J.)per Shi 1 unit/mod. Plant

Skilled Operator 2.0 2.0 Operator 9.0 9.0 Foreman 1.0 1.0 Lab Tech's, etc. 2.0 2.0 TOTAL-O.J.'s 14.0 14.0 Annual Cost Annual Unit Cost $ $/kW-net Annual Operating Labor Cost $6,329,450 $11.507 Maintenance Labor Cost $7,007,334 $12.739 Administrative & Support Labor $3,334,196 $6.062 Property Taxes and Insurance $21,480,398 $39.052 TOTAL FIXED OPERATING COSTS $38,151,378 $69.360 VARIABLE OPERATING COSTS $/kWh-net Maintenance Material Cost $10,511,001 $0.00257

Consumables Consumption Unit Initial Fill Initial Fill /Day Cost Cost
Water (/1000 gallons) 0 4,245.12 1.67 $0 $2,204,732 $0.00054

Chemicals

MU & WT Chem.(lbs) 0 20,549 0.27 $0 $1,707,570 $0.00042 Limestone (ton) 0 521 33.48 $0 $5,410,837 $0.00132 Carbon (Mercury Removal) (lb) 0 0 1.63 $0 $0 $0.00000 MEA Solvent (ton) 0 0 3,481.91 $0 $0 $0.00000 NaOH (tons) 0 0 671.16 $0 $0 $0.00000 H2SO4 (tons) 0 0 214.78 $0 $0 $0.00000 Corrosion Inhibitor 0 0 0.00 $0 $0 $0.00000 Activated Carbon (lb) 0 0 1.63 $0 $0 $0.00000 Ammonia (19% NH3) ton 0 78 330.00 $0 $7,973,549 $0.00195 Subtotal Chemicals $0 $15,091,955 $0.00368

Other

Supplemental Fuel (MBtu) 0 0 0.00 $0 $0 $0.00000 SCR Catalyst (m3) w/equip. 0.33 8,938.80 $0 $917,168 $0.00022 Emission Penalties 0 0 0.00 $0 $0 $0.00000 Subtotal Other $0 $917,168 $0.00022

Waste Disposal

Fly Ash (ton) 0 407 25.11 $0 $3,171,856 $0.00077 Bottom Ash (ton) 0 102 25.11 $0 $792,964 $0.00019

Subtotal-Waste Disposal $0 $3,964,820 $0.00097

By-products & Emissions

Gypsum (tons) 0 811 0.00 $0 $0 $0.00000 Subtotal By-Products $0 $0 $0.00000

TOTAL VARIABLE OPERATING COSTS $0 $32,689,676 $0.00798

Fuel (ton) 0 5,248 68.60 $0 $111,701,264 $0.02727

### Updated Costs (J une 2011 Basis)



# 23 Exhibit 4
-8 Case 10 capital and owner’s costs

Client: USDOE/NETL Report Date: 2012-Jun-12 Project: Bituminous Baseline Study

Case: Case 10 1x550 MWnet SubCritical PC w/ CO2 Capture Plant Size: 550.0 MW,net Estimate Type: Cost Base (Jun) 2011 ($x1000) Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 1 COAL & SORBENT HANDLING 1.1 Coal Receive & Unload $5,260 $0 $2,370 $0 $7,630 $661 $0 $1,244 $9,535 $17 1.2 Coal Stackout & Reclaim $6,798 $0 $1,519 $0 $8,317 $705 $0 $1,353 $10,375 $19 1.3 Coal Conveyors $6,320 $0 $1,503 $0 $7,824 $664 $0 $1,273 $9,761 $18 1.4 Other Coal Handling $1,654 $0 $348 $0 $2,001 $169 $0 $326 $2,496 $5 1.5 Sorbent Receive & Unload $216 $0 $64 $0 $280 $24 $0 $46 $349 $1 1.6 Sorbent Stackout & Reclaim $3,483 $0 $629 $0 $4,112 $346 $0 $669 $5,127 $9 1.7 Sorbent Conveyors $1,243 $270 $301 $0 $1,813 $152 $0 $295 $2,259 $4 1.8 Other Sorbent Handling $751 $177 $388 $0 $1,315 $113 $0 $214 $1,642 $3 1.9 Coal & Sorbent Hnd.Foundations $0 $6,097 $8,038 $0 $14,135 $1,325 $0 $2,319 $17,779 $32 SUBTOTAL 1. $25,724 $6,543 $15,160 $0 $47,427 $4,159 $0 $7,738 $59,325 $108 2 COAL & SORBENT PREP & FEED 2.1 Coal Crushing & Drying $3,062 $0 $589 $0 $3,651 $308 $0 $594 $4,553 $8 2.2 Coal Conveyor to Storage $7,840 $0 $1,688 $0 $9,528 $806 $0 $1,550 $11,885 $22 2.3 Coal Injection System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.4 Misc.Coal Prep & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.5 Sorbent Prep Equipment $5,941 $257 $1,217 $0 $7,415 $625 $0 $1,206 $9,245 $17 2.6 Sorbent Storage & Feed $716 $0 $270 $0 $986 $85 $0 $161 $1,232 $2 2.7 Sorbent Injection System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.8 Booster Air Supply System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.9 Coal & Sorbent Feed Foundation $0 $725 $636 $0 $1,361 $127 $0 $223 $1,711 $3 SUBTOTAL 2. $17,559 $982 $4,400 $0 $22,941 $1,951 $0 $3,734 $28,625 $52 3 FEEDWATER & MISC. BOP SYSTEMS 3.1 Feedwater System $24,738 $0 $8,523 $0 $33,262 $2,849 $0 $5,417 $41,527 $76 3.2 Water Makeup & Pretreating $9,142 $0 $2,892 $0 $12,034 $1,100 $0 $2,627 $15,760 $29 3.3 Other Feedwater Subsystems $8,316 $0 $3,414 $0 $11,730 $1,008 $0 $1,911 $14,649 $27 3.4 Service Water Systems $1,831 $0 $958 $0 $2,789 $250 $0 $608 $3,647 $7 3.5 Other Boiler Plant Systems $10,104 $0 $9,553 $0 $19,656 $1,789 $0 $3,217 $24,662 $45 3.6 FO Supply Sys & Nat Gas $357 $0 $417 $0 $773 $69 $0 $126 $969 $2 3.7 Waste Treatment Equipment $5,998 $0 $3,472 $0 $9,470 $911 $0 $2,076 $12,457 $23 3.8 Misc. Equip.(cranes,AirComp.,Comm.) $3,494 $0 $1,081 $0 $4,575 $435 $0 $1,002 $6,012 $11 SUBTOTAL 3. $63,980 $0 $30,309 $0 $94,289 $8,411 $0 $16,983 $119,684 $218 4 PC BOILER & ACCESSORIES 4.1 PC Boiler & Accessories $201,617 $0 $131,668 $0 $333,285 $32,094 $0 $36,538 $401,917 $731 4.2 SCR (w/4.1) $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.3 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.4 Boiler BoP (w/ ID Fans) $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.5 Primary Air System w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.6 Secondary Air System w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.8 Major Component Rigging $0 w/4.1 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.9 Boiler Foundations $0 w/14.1 w/14.1 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 4. $201,617 $0 $131,668 $0 $333,285 $32,094 $0 $36,538 $401,917 $731 

### TOTAL PLANT COST SUMMARY

### Updated Costs (J une 2011 Basis)



# 24 Exhibit 4

-8 Case 10 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 5 FLUE GAS CLEANUP 5.1 Absorber Vessels & Accessories $90,067 $0 $19,257 $0 $109,324 $10,149 $0 $11,947 $131,421 $239 5.2 Other FGD $4,700 $0 $5,290 $0 $9,990 $946 $0 $1,094 $12,030 $22 5.3 Bag House & Accessories $26,018 $0 $16,398 $0 $42,416 $3,986 $0 $4,640 $51,042 $93 5.4 Other Particulate Removal Materials $1,761 $0 $1,871 $0 $3,632 $344 $0 $398 $4,373 $8 5.5 Gypsum Dewatering System $7,144 $0 $1,205 $0 $8,349 $774 $0 $912 $10,035 $18 5.6 Mercury Removal System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5.9 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 5. $129,690 $0 $44,022 $0 $173,711 $16,199 $0 $18,991 $208,902 $380 5B CO2 REMOVAL & COMPRESSION 5B.1 CO2 Removal System $263,358 $0 $79,417 $0 $342,775 $31,924 $68,555 $88,651 $531,906 $967 5B.2 CO2 Compression & Drying $51,312 $0 $18,582 $0 $69,894 $6,522 $0 $15,283 $91,699 $167 SUBTOTAL 5B. $314,670 $0 $97,999 $0 $412,669 $38,447 $68,555 $103,934 $623,605 $1,134 6 COMBUSTION TURBINE/ACCESSORIES 6.1 Combustion Turbine Generator N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 6.2 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.3 Compressed Air Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.9 Combustion Turbine Foundations $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 6. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7 HRSG, DUCTING & STACK 7.1 Heat Recovery Steam Generator N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 7.2 HRSG Accessories $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7.3 Ductwork $12,422 $0 $7,841 $0 $20,263 $1,712 $0 $3,296 $25,271 $46 7.4 Stack $11,230 $0 $6,526 $0 $17,756 $1,667 $0 $1,942 $21,365 $39 7.9 Duct & Stack Foundations $0 $1,224 $1,454 $0 $2,678 $251 $0 $586 $3,514 $6 SUBTOTAL 7. $23,652 $1,224 $15,821 $0 $40,697 $3,629 $0 $5,824 $50,150 $91 8 STEAM TURBINE GENERATOR 8.1 Steam TG & Accessories $71,266 $0 $8,267 $0 $79,533 $6,978 $0 $8,651 $95,161 $173 8.2 Turbine Plant Auxiliaries $466 $0 $992 $0 $1,458 $139 $0 $160 $1,757 $3 8.3 Condenser & Auxiliaries $7,418 $0 $3,051 $0 $10,470 $978 $0 $1,145 $12,593 $23 8.4 Steam Piping $26,973 $0 $11,984 $0 $38,957 $2,986 $0 $6,291 $48,234 $88 8.9 TG Foundations $0 $1,390 $2,295 $0 $3,684 $347 $0 $806 $4,838 $9 SUBTOTAL 8. $106,123 $1,390 $26,588 $0 $134,101 $11,428 $0 $17,053 $162,582 $296 9 COOLING WATER SYSTEM 9.1 Cooling Towers $20,085 $0 $6,212 $0 $26,297 $2,450 $0 $2,875 $31,622 $57 9.2 Circulating Water Pumps $4,017 $0 $311 $0 $4,329 $369 $0 $470 $5,168 $9 9.3 Circ.Water System Auxiliaries $1,012 $0 $134 $0 $1,146 $106 $0 $125 $1,377 $3 9.4 Circ.Water Piping $0 $8,525 $7,720 $0 $16,244 $1,438 $0 $2,652 $20,335 $37 9.5 Make-up Water System $847 $0 $1,088 $0 $1,935 $179 $0 $317 $2,430 $4 9.6 Component Cooling Water Sys $825 $0 $633 $0 $1,458 $133 $0 $239 $1,830 $3 9.9 Circ.Water System Foundations& Structures $0 $4,520 $7,505 $0 $12,025 $1,133 $0 $2,632 $15,790 $29 SUBTOTAL 9. $26,786 $13,044 $23,603 $0 $63,434 $5,807 $0 $9,309 $78,550 $143

### Updated Costs (J une 2011 Basis)



# 25 Exhibit 4

-8 Case 10 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 10 ASH/SPENT SORBENT HANDLING SYS 10.1 Ash Coolers N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.2 Cyclone Ash Letdown N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.3 HGCU Ash Letdown N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.4 High Temperature Ash Piping N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.5 Other Ash Recovery Equipment N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.6 Ash Storage Silos $891 $0 $2,727 $0 $3,619 $347 $0 $397 $4,363 $8 10.7 Ash Transport & Feed Equipment $5,921 $0 $5,870 $0 $11,790 $1,086 $0 $1,288 $14,164 $26 10.8 Misc. Ash Handling Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.9 Ash/Spent Sorbent Foundation $0 $201 $248 $0 $449 $42 $0 $98 $589 $1 SUBTOTAL 10. $6,812 $201 $8,845 $0 $15,858 $1,475 $0 $1,782 $19,116 $35 11 ACCESSORY ELECTRIC PLANT 11.1 Generator Equipment $2,119 $0 $339 $0 $2,457 $220 $0 $201 $2,878 $5 11.2 Station Service Equipment $6,040 $0 $2,025 $0 $8,065 $750 $0 $661 $9,476 $17 11.3 Switchgear & Motor Control $6,933 $0 $1,204 $0 $8,137 $752 $0 $889 $9,779 $18 11.4 Conduit & Cable Tray $0 $4,754 $15,360 $0 $20,115 $1,877 $0 $3,299 $25,291 $46 11.5 Wire & Cable $0 $9,053 $16,182 $0 $25,235 $2,027 $0 $4,089 $31,350 $57 11.6 Protective Equipment $317 $0 $1,099 $0 $1,416 $136 $0 $155 $1,707 $3 11.7 Standby Equipment $1,607 $0 $37 $0 $1,644 $151 $0 $180 $1,975 $4 11.8 Main Power Transformers $13,779 $0 $228 $0 $14,007 $1,062 $0 $1,507 $16,576 $30 11.9 Electrical Foundations $0 $398 $1,013 $0 $1,411 $133 $0 $309 $1,853 $3 SUBTOTAL 11. $30,795 $14,205 $37,488 $0 $82,488 $7,109 $0 $11,289 $100,886 $183 12 INSTRUMENTATION & CONTROL 12.1 PC Control Equipment w/12.7 $0 w/12.7 $0 $0 $0 $0 $0 $0 $0 12.2 Combustion Turbine Control N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 12.3 Steam Turbine Control w/8.1 $0 w/8.1 $0 $0 $0 $0 $0 $0 $0 12.4 Other Major Component Control $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 12.5 Signal Processing Equipment w/12.7 $0 w/12.7 $0 $0 $0 $0 $0 $0 $0 12.6 Control Boards,Panels & Racks $601 $0 $367 $0 $968 $91 $48 $166 $1,273 $2 12.7 Distributed Control System Equipment $6,064 $0 $1,081 $0 $7,146 $660 $357 $816 $8,979 $16 12.8 Instrument Wiring & Tubing $3,657 $0 $6,654 $0 $10,311 $835 $516 $1,749 $13,411 $24 12.9 Other I & C Equipment $1,714 $0 $3,968 $0 $5,681 $543 $284 $651 $7,159 $13 SUBTOTAL 12. $12,035 $0 $12,070 $0 $24,106 $2,129 $1,205 $3,382 $30,822 $56

### Updated Costs (J une 2011 Basis)



# 26 Exhibit 4

-8 Case 10 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 13 IMPROVEMENTS TO SITE 13.1 Site Preparation $0 $63 $1,346 $0 $1,409 $137 $0 $309 $1,856 $3 13.2 Site Improvements $0 $2,100 $2,775 $0 $4,875 $484 $0 $1,072 $6,431 $12 13.3 Site Facilities $3,764 $0 $3,948 $0 $7,712 $767 $0 $1,696 $10,175 $18 SUBTOTAL 13. $3,764 $2,164 $8,069 $0 $13,996 $1,389 $0 $3,077 $18,462 $34 14 BUILDINGS & STRUCTURES 14.1 Boiler Building $0 $10,972 $9,643 $0 $20,615 $1,814 $0 $3,364 $25,793 $47 14.2 Turbine Building $0 $16,078 $14,974 $0 $31,052 $2,740 $0 $5,069 $38,861 $71 14.3 Administration Building $0 $775 $818 $0 $1,593 $141 $0 $260 $1,994 $4 14.4 Circulation Water Pumphouse $0 $211 $168 $0 $379 $33 $0 $62 $474 $1 14.5 Water Treatment Buildings $0 $1,140 $1,039 $0 $2,179 $192 $0 $356 $2,727 $5 14.6 Machine Shop $0 $518 $348 $0 $866 $75 $0 $141 $1,082 $2 14.7 Warehouse $0 $351 $352 $0 $703 $62 $0 $115 $880 $2 14.8 Other Buildings & Structures $0 $287 $244 $0 $531 $47 $0 $87 $664 $1 14.9 Waste Treating Building & Str. $0 $549 $1,665 $0 $2,215 $206 $0 $363 $2,784 $5 SUBTOTAL 14. $0 $30,881 $29,251 $0 $60,133 $5,310 $0 $9,816 $75,259 $137

TOTAL COST $963,207 $70,634 $485,294 $0 $1,519,135 $139,537 $69,760 $249,452 $1,977,885 $3,596 

### Owner's Costs Preproduction Costs 6 Months All Labor $12,549 $23 1 Month Maintenance Materials $1,867 $3 1 Month Non-fuel Consumables $3,202 $6 1 Month Waste Disposal $547 $1 25% of 1 Months Fuel Cost at 100% CF $3,850 $7 2% of TPC $39,558 $72 Total $61,572 $112 Inventory Capital 60 day supply of fuel and consumables at 100% CF $36,379 $66 0.5% of TPC (spare parts) $9,889 $18 Total $46,268 $84
Initial Cost for Catalyst and Chemicals $4,187 $8 Land $900 $2 Other Owner's Costs $296,683 $539

Financing Costs $53,403 $97 

### Total Overnight Costs (TOC) $2,440,898 $4,438 TASC Multiplier (IOU, high-risk, 35 year) 1.140 

### Total As-Spent Cost (TASC) $2,782,624 $5,059

### Updated Costs (J une 2011 Basis)



# 27 Exhibit 4
-9 Case 10 O&M costs

INITIAL & ANNUAL O&M EXPENSES Cost Base (Jun): 2011 Case 10 - 1x550 MWnet SubCritical PC w/ CO2 Capture Heat Rate-net (Btu/kWh): 13,044 MWe-net: 550 Capacity Factor (%): 85 OPERATING & MAINTENANCE LABOR Operating Labor Operating Labor Rate (base): 39.70 $/hour Operating Labor Burden: 30.00 % of base Labor O-H Charge Rate: 25.00 % of labor

Total Operating Labor Requirements(O.J.)per Shift: 1 unit/mod. Plant

Skilled Operator 2.0 2.0 Operator 11.3 11.3 Foreman 1.0 1.0 Lab Tech's, etc. 2.0 2.0 TOTAL-O.J.'s 16.3 16.3 Annual Cost Annual Unit Cost $ $/kW-net Annual Operating Labor Cost $7,384,208 $13.426 Maintenance Labor Cost $12,694,314 $23.080 Administrative & Support Labor $5,019,631 $9.126 Property Taxes and Insurance $39,557,702 $71.922 TOTAL FIXED OPERATING COSTS $64,655,855 $117.554 VARIABLE OPERATING COSTS $/kWh-net Maintenance Material Cost $19,041,471 $0.00465

Consumables Consumption Unit Initial Fill Initial Fill /Day Cost Cost
Water (/1000 gallons) 0 8,081 1.67 $0 $4,197,067 $0.00102

Chemicals

MU & WT Chem.(lbs) 0 39,119 0.27 $0 $3,250,638 $0.00079 Limestone (ton) 0 751 33.48 $0 $7,805,051 $0.00191 Carbon (Mercury Removal) (lb) 0 0 1.63 $0 $0 $0.00000 MEA Solvent (ton) 1,117 1.58 3,481.91 $3,889,510 $1,710,963 $0.00042 NaOH (tons) 79 7.89 671.16 $52,960 $1,643,087 $0.00040 H2SO4 (tons) 75 7.53 214.78 $16,173 $501,756 $0.00012 Corrosion Inhibitor 0 0 0.00 $228,761 $10,893 $0.00000 Activated Carbon (lb) 0 1,892 1.63 $0 $953,987 $0.00023 Ammonia (19% NH3) ton 0 110 330.00 $0 $11,304,257 $0.00276 Subtotal Chemicals $4,187,404 $27,180,633 $0.00664

Other

Supplemental Fuel (MBtu) 0 0 0.00 $0 $0 $0.00000 SCR Catalyst (m3) w/equip. 0.46 8,938.80 $0 $1,286,850 $0.00031 Emission Penalties 0 0 0.00 $0 $0 $0.00000 Subtotal Other $0 $1,286,850 $0.00031

Waste Disposal

Fly Ash (ton) 0 572 25.11 $0 $4,459,927 $0.00109 Bottom Ash (ton) 0 143 25.11 $0 $1,114,982 $0.00027 Subtotal-Waste Disposal $0 $5,574,909 $0.00136

By-products & Emissions

Gypsum (tons) 0 1,159 0.00 $0 $0 $0.00000 Subtotal By-Products $0 $0 $0.00000

TOTAL VARIABLE OPERATING COSTS $4,187,404 $57,280,930 $0.01399

Fuel (ton) 0 7,380 68.60 $0 $157,063,965 $0.03835

### Updated Costs (J une 2011 Basis)



# 28 Exhibit 4
- 10 Case 11 capital and owner’s costs

Client: USDOE/NETL Report Date: 2012-Jun-12 Project: Bituminous Baseline Study

Case: Case 11 1x550 MWnet SuperCritical PC Plant Size: 550.0 MW, net Estimate Type: Cost Base (Jun) 2011 ($x1000) Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 1 COAL & SORBENT HANDLING 1.1 Coal Receive & Unload $4,088 $0 $1,842 $0 $5,930 $514 $0 $967 $7,410 $13 1.2 Coal Stackout & Reclaim $5,283 $0 $1,181 $0 $6,464 $548 $0 $1,052 $8,063 $15 1.3 Coal Conveyors $4,912 $0 $1,168 $0 $6,080 $516 $0 $989 $7,586 $14 1.4 Other Coal Handling $1,285 $0 $270 $0 $1,555 $132 $0 $253 $1,940 $4 1.5 Sorbent Receive & Unload $164 $0 $49 $0 $212 $18 $0 $35 $265 $0 1.6 Sorbent Stackout & Reclaim $2,641 $0 $477 $0 $3,118 $263 $0 $507 $3,888 $7 1.7 Sorbent Conveyors $942 $205 $228 $0 $1,375 $115 $0 $223 $1,713 $3 1.8 Other Sorbent Handling $569 $134 $294 $0 $998 $85 $0 $162 $1,246 $2 1.9 Coal & Sorbent Hnd.Foundations $0 $4,738 $6,247 $0 $10,985 $1,030 $0 $1,802 $13,817 $25 SUBTOTAL 1. $19,885 $5,077 $11,756 $0 $36,718 $3,221 $0 $5,991 $45,929 $84 2 COAL & SORBENT PREP & FEED 2.1 Coal Crushing & Drying $2,341 $0 $450 $0 $2,791 $236 $0 $454 $3,481 $6 2.2 Coal Conveyor to Storage $5,995 $0 $1,291 $0 $7,286 $617 $0 $1,185 $9,088 $17 2.3 Coal Injection System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.4 Misc.Coal Prep & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.5 Sorbent Prep Equipment $4,486 $194 $919 $0 $5,599 $472 $0 $911 $6,981 $13 2.6 Sorbent Storage & Feed $540 $0 $204 $0 $745 $64 $0 $121 $930 $2 2.7 Sorbent Injection System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.8 Booster Air Supply System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.9 Coal & Sorbent Feed Foundation $0 $547 $480 $0 $1,028 $96 $0 $168 $1,292 $2 SUBTOTAL 2. $13,363 $742 $3,344 $0 $17,448 $1,483 $0 $2,840 $21,772 $40 3 FEEDWATER & MISC. BOP SYSTEMS 3.1 Feedwater System $22,338 $0 $7,202 $0 $29,540 $2,524 $0 $4,810 $36,874 $67 3.2 Water Makeup & Pretreating $5,434 $0 $1,719 $0 $7,152 $654 $0 $1,561 $9,367 $17 3.3 Other Feedwater Subsystems $7,027 $0 $2,885 $0 $9,912 $852 $0 $1,615 $12,378 $23 3.4 Service Water Systems $1,088 $0 $569 $0 $1,658 $149 $0 $361 $2,168 $4 3.5 Other Boiler Plant Systems $8,511 $0 $8,046 $0 $16,557 $1,507 $0 $2,710 $20,773 $38 3.6 FO Supply Sys & Nat Gas $327 $0 $382 $0 $709 $63 $0 $116 $888 $2 3.7 Waste Treatment Equipment $3,565 $0 $2,064 $0 $5,628 $542 $0 $1,234 $7,404 $13 3.8 Misc. Equip.(cranes,AirComp.,Comm.) $3,203 $0 $991 $0 $4,194 $399 $0 $919 $5,511 $10 SUBTOTAL 3. $51,492 $0 $23,858 $0 $75,351 $6,689 $0 $13,325 $95,364 $173 4 PC BOILER 4.1 PC Boiler & Accessories $185,402 $0 $105,641 $0 $291,043 $28,011 $0 $31,905 $350,959 $638 4.2 SCR (w/4.1) $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.3 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.4 Boiler BoP (w/ ID Fans) $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.5 Primary Air System w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.6 Secondary Air System w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.8 Major Component Rigging $0 w/4.1 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.9 Boiler Foundations $0 w/14.1 w/14.1 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 4. $185,402 $0 $105,641 $0 $291,043 $28,011 $0 $31,905 $350,959 $638 

### TOTAL PLANT COST SUMMARY

### Updated Costs (J une 2011 Basis)



# 29 Exhibit 4
- 10 Case 11 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 5 FLUE GAS CLEANUP $0 $0 $0 $0 $0 $0 0% $0 $0 $0 5.1 Absorber Vessels & Accessories $66,871 $0 $14,297 $0 $81,168 $7,535 $0 $8,870 $97,574 $177 5.2 Other FGD $3,490 $0 $3,927 $0 $7,417 $703 $0 $812 $8,932 $16 5.3 Bag House & Accessories $18,833 $0 $11,870 $0 $30,703 $2,885 $0 $3,359 $36,947 $67 5.4 Other Particulate Removal Materials $1,274 $0 $1,354 $0 $2,629 $249 $0 $288 $3,166 $6 5.5 Gypsum Dewatering System $5,543 $0 $935 $0 $6,478 $600 $0 $708 $7,786 $14 5.6 Mercury Removal System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5.9 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 5. $96,010 $0 $32,384 $0 $128,395 $11,972 $0 $14,037 $154,404 $281 5B CO2 REMOVAL & COMPRESSION 5B.1 CO2 Removal System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5B.2 CO2 Compression & Drying $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 5. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6 COMBUSTION TURBINE/ACCESSORIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.1 Combustion Turbine Generator N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 6.2 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.3 Compressed Air Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.9 Combustion Turbine Foundations $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 6. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7 HRSG, DUCTING & STACK 7.1 Heat Recovery Steam Generator N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 7.2 HRSG Accessories $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7.3 Ductwork $10,572 $0 $6,673 $0 $17,246 $1,457 $0 $2,805 $21,508 $39 7.4 Stack $10,513 $0 $6,110 $0 $16,623 $1,560 $0 $1,818 $20,002 $36 7.9 Duct & Stack Foundations $0 $1,146 $1,361 $0 $2,507 $235 $0 $548 $3,290 $6 SUBTOTAL 7. $21,086 $1,146 $14,144 $0 $36,376 $3,252 $0 $5,172 $44,799 $81 8 STEAM TURBINE GENERATOR 8.1 Steam TG & Accessories $66,640 $0 $8,221 $0 $74,861 $6,572 $0 $8,143 $89,576 $163 8.2 Turbine Plant Auxiliaries $418 $0 $890 $0 $1,309 $125 $0 $143 $1,577 $3 8.3 Condenser & Auxiliaries $8,091 $0 $2,740 $0 $10,831 $1,010 $0 $1,184 $13,025 $24 8.4 Steam Piping $21,119 $0 $9,383 $0 $30,503 $2,338 $0 $4,926 $37,766 $69 8.9 TG Foundations $0 $1,248 $2,060 $0 $3,308 $312 $0 $724 $4,344 $8 SUBTOTAL 8. $96,269 $1,248 $23,294 $0 $120,811 $10,357 $0 $15,121 $146,289 $266 9 COOLING WATER SYSTEM 9.1 Cooling Towers $10,951 $0 $3,387 $0 $14,338 $1,336 $0 $1,567 $17,242 $31 9.2 Circulating Water Pumps $2,187 $0 $138 $0 $2,325 $198 $0 $252 $2,775 $5 9.3 Circ.Water System Auxiliaries $601 $0 $80 $0 $680 $63 $0 $74 $817 $1 9.4 Circ.Water Piping $0 $5,062 $4,584 $0 $9,645 $854 $0 $1,575 $12,074 $22 9.5 Make-up Water System $545 $0 $701 $0 $1,246 $115 $0 $204 $1,566 $3 9.6 Component Cooling Water Sys $490 $0 $376 $0 $866 $79 $0 $142 $1,086 $2 9.9 Circ.Water System Foundations& Structures $0 $2,687 $4,463 $0 $7,150 $674 $0 $1,565 $9,388 $17 SUBTOTAL 9. $14,774 $7,749 $13,728 $0 $36,251 $3,318 $0 $5,380 $44,949 $82

### Updated Costs (J une 2011 Basis)



# 30 Exhibit 4
- 10 Case 11 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 10 ASH/SPENT SORBENT HANDLING SYS 10.1 Ash Coolers N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.2 Cyclone Ash Letdown N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.3 HGCU Ash Letdown N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.4 High Temperature Ash Piping N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.5 Other Ash Recovery Equipment N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.6 Ash Storage Silos $711 $0 $2,176 $0 $2,888 $277 $0 $316 $3,481 $6 10.7 Ash Transport & Feed Equipment $4,725 $0 $4,684 $0 $9,408 $867 $0 $1,028 $11,303 $21 10.8 Misc. Ash Handling Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.9 Ash/Spent Sorbent Foundation $0 $161 $198 $0 $358 $34 $0 $78 $470 $1 SUBTOTAL 10. $5,436 $161 $7,058 $0 $12,654 $1,177 $0 $1,422 $15,254 $28 11 ACCESSORY ELECTRIC PLANT 11.1 Generator Equipment $1,943 $0 $311 $0 $2,254 $202 $0 $184 $2,640 $5 11.2 Station Service Equipment $3,314 $0 $1,111 $0 $4,424 $411 $0 $363 $5,198 $9 11.3 Switchgear & Motor Control $3,803 $0 $661 $0 $4,464 $413 $0 $488 $5,364 $10 11.4 Conduit & Cable Tray $0 $2,608 $8,426 $0 $11,034 $1,030 $0 $1,810 $13,874 $25 11.5 Wire & Cable $0 $4,966 $8,877 $0 $13,843 $1,112 $0 $2,243 $17,198 $31 11.6 Protective Equipment $306 $0 $1,063 $0 $1,370 $131 $0 $150 $1,652 $3 11.7 Standby Equipment $1,498 $0 $35 $0 $1,533 $140 $0 $167 $1,841 $3 11.8 Main Power Transformers $9,896 $0 $206 $0 $10,102 $767 $0 $1,087 $11,955 $22 11.9 Electrical Foundations $0 $359 $913 $0 $1,272 $120 $0 $279 $1,671 $3 SUBTOTAL 11. $20,761 $7,933 $21,603 $0 $50,297 $4,327 $0 $6,770 $61,394 $112 12 INSTRUMENTATION & CONTROL 12.1 PC Control Equipment w/12.7 $0 w/12.7 $0 $0 $0 $0 $0 $0 $0 12.2 Combustion Turbine Control N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 12.3 Steam Turbine Control w/8.1 $0 w/8.1 $0 $0 $0 $0 $0 $0 $0 12.4 Other Major Component Control $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 12.5 Signal Processing Equipment w/12.7 $0 w/12.7 $0 $0 $0 $0 $0 $0 $0 12.6 Control Boards,Panels & Racks $528 $0 $323 $0 $851 $80 $0 $140 $1,070 $2 12.7 Distributed Control System Equipment $5,331 $0 $951 $0 $6,281 $580 $0 $686 $7,548 $14 12.8 Instrument Wiring & Tubing $3,214 $0 $5,849 $0 $9,063 $734 $0 $1,470 $11,267 $20 12.9 Other I & C Equipment $1,506 $0 $3,488 $0 $4,994 $477 $0 $547 $6,018 $11 SUBTOTAL 12. $10,579 $0 $10,610 $0 $21,190 $1,871 $0 $2,842 $25,903 $47

### Updated Costs (J une 2011 Basis)



# 31 Exhibit 4

- 10 Case 11 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 13 IMPROVEMENTS TO SITE 13.1 Site Preparation $0 $56 $1,195 $0 $1,251 $122 $0 $275 $1,648 $3 13.2 Site Improvements $0 $1,865 $2,464 $0 $4,328 $430 $0 $952 $5,710 $10 13.3 Site Facilities $3,342 $0 $3,506 $0 $6,847 $681 $0 $1,506 $9,035 $16 SUBTOTAL 13. $3,342 $1,921 $7,164 $0 $12,427 $1,233 $0 $2,732 $16,392 $30 14 BUILDINGS & STRUCTURES 14.1 Boiler Building $0 $9,922 $8,719 $0 $18,641 $1,640 $0 $3,042 $23,323 $42 14.2 Turbine Building $0 $14,171 $13,198 $0 $27,369 $2,415 $0 $4,468 $34,251 $62 14.3 Administration Building $0 $703 $742 $0 $1,445 $128 $0 $236 $1,809 $3 14.4 Circulation Water Pumphouse $0 $201 $160 $0 $361 $32 $0 $59 $452 $1 14.5 Water Treatment Buildings $0 $678 $618 $0 $1,295 $114 $0 $211 $1,621 $3 14.6 Machine Shop $0 $470 $315 $0 $785 $68 $0 $128 $982 $2 14.7 Warehouse $0 $318 $319 $0 $638 $56 $0 $104 $798 $1 14.8 Other Buildings & Structures $0 $260 $221 $0 $482 $42 $0 $79 $602 $1 14.9 Waste Treating Building & Str. $0 $498 $1,511 $0 $2,009 $187 $0 $329 $2,525 $5 SUBTOTAL 14. $0 $27,220 $25,804 $0 $53,024 $4,683 $0 $8,656 $66,363 $121

TOTAL COST $538,399 $53,196 $300,389 $0 $891,984 $81,594 $0 $116,193 $1,089,771 $1,981 

### Owner's Costs Preproduction Costs 6 Months All Labor $8,517 $15 1 Month Maintenance Materials $1,073 $2 1 Month Non-fuel Consumables $1,670 $3 1 Month Waste Disposal $364 $1 25% of 1 Months Fuel Cost at 100% CF $2,564 $5 2% of TPC $21,795 $40 Total $35,982 $65 Inventory Capital 60 day supply of fuel and consumables at 100% CF $23,452 $43 0.5% of TPC (spare parts) $5,449 $10 Total $28,901 $53

Initial Cost for Catalyst and Chemicals $0 $0 Land $900 $2 Other Owner's Costs $163,466 $297

Financing Costs $29,424 $53 

### Total Overnight Costs (TOC) $1,348,443 $2,452 TASC Multiplier (IOU, low-risk, 35 year) 1.134 

### Total As-Spent Cost (TASC) $1,529,135 $2,780

### Updated Costs (J une 2011 Basis)



# 32 Exhibit 4
- 11 Case 11 O&M costs

INITIAL & ANNUAL O&M EXPENSES Cost Base (Jun): 2011 Case 11 - 1x550 MWnet SuperCritical PC Heat Rate-net (Btu/kWh): 8,686 MWe-net: 550 Capacity Factor (%): 85 OPERATING & MAINTENANCE LABOR Operating Labor Operating Labor Rate (base): 39.70 $/hour Operating Labor Burden: 30.00 % of base Labor O-H Charge Rate: 25.00 % of labor

Total Operating Labor Requirements(O.J.)per 1 unit/mod. Plant Skilled Operator 2.0 2.0 Operator 9.0 9.0 Foreman 1.0 1.0 Lab Tech's, etc. 2.0 2.0 TOTAL-O.J.'s 14.0 14.0 Annual Cost Annual Unit Cost $ $/kW-net Annual Operating Labor Cost $6,329,450 $11.508 Maintenance Labor Cost $7,297,262 $13.267 Administrative & Support Labor $3,406,678 $6.194 Property Taxes and Insurance $21,795,421 $39.627 TOTAL FIXED OPERATING COSTS $38,828,811 $70.595 VARIABLE OPERATING COSTS $/kWh-net Maintenance Material Cost $10,945,892 $0.00267

Consumables Consumption Unit Initial Fill Initial Fill /Day Cost Cost
Water (/1000 gallons) 0 3,884 1.67 $0 $2,017,015 $0.00049

Chemicals

MU & WT Chem.(lbs) 0 18,799 0.27 $0 $1,562,183 $0.00038 Limestone (ton) 0 488 33.48 $0 $5,066,306 $0.00124 Carbon (Mercury Removal) (lb) 0 0.00 1.63 $0 $0 $0.00000 MEA Solvent (ton) 0 0 3,481.91 $0 $0 $0.00000 NaOH (tons) 0 0 671.16 $0 $0 $0.00000 H2SO4 (tons) 0 0 214.78 $0 $0 $0.00000 Corrosion Inhibitor 0 0 0.00 $0 $0 $0.00000 Activated Carbon (lb) 0 0.00 1.63 $0 $0 $0.00000 Ammonia (19% NH3) ton 0 73.52 330.00 $0 $7,527,571 $0.00184 Subtotal Chemicals $0 $14,156,060 $0.00346

Other

Supplemental Fuel (MBtu) 0 0 0.00 $0 $0 $0.00000 SCR Catalyst (m3) w/equip. 0 8,938.80 $0 $857,054 $0.00021 Emission Penalties 0 0 0.00 $0 $0 $0.00000 Subtotal Other $0 $857,054 $0.00021

Waste Disposal

Fly Ash (ton) 0 381 25.11 $0 $2,969,890 $0.00073 Bottom Ash (ton) 0 95 25.11 $0 $742,473 $0.00018 Subtotal-Waste Disposal $0 $3,712,363 $0.00091

By-products & Emissions Gypsum (tons) 0 759 0.00 $0 $0 $0.00000 Subtotal By-Products $0 $0 $0.00000

TOTAL VARIABLE OPERATING COSTS $0 $31,688,385 $0.00774

Fuel (ton) 0 4,914 68.60 $0 $104,590,800 $0.02554

### Updated Costs (J une 2011 Basis)



# 33 Exhibit 4
- 12 Case 12 capital and owner’s costs

Client: USDOE/NETL Report Date: 2012-Jun-12 Project: Bituminous Baseline Study

Case: Case 12 1x550 MWnet SuperCritical PC w/ CO2 Capture Plant Size: 550.0 MW, net Estimate Type: Cost Base (Jun) 2011 ($x1000) Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 1 COAL & SORBENT HANDLING 1.1 Coal Receive & Unload $4,995 $0 $2,250 $0 $7,246 $628 $0 $1,181 $9,055 $16 1.2 Coal Stackout & Reclaim $6,456 $0 $1,443 $0 $7,898 $669 $0 $1,285 $9,853 $18 1.3 Coal Conveyors $6,002 $0 $1,427 $0 $7,430 $630 $0 $1,209 $9,269 $17 1.4 Other Coal Handling $1,570 $0 $330 $0 $1,901 $161 $0 $309 $2,371 $4 1.5 Sorbent Receive & Unload $204 $0 $61 $0 $264 $23 $0 $43 $330 $1 1.6 Sorbent Stackout & Reclaim $3,288 $0 $594 $0 $3,883 $327 $0 $631 $4,841 $9 1.7 Sorbent Conveyors $1,173 $255 $284 $0 $1,712 $143 $0 $278 $2,133 $4 1.8 Other Sorbent Handling $709 $167 $367 $0 $1,242 $106 $0 $202 $1,551 $3 1.9 Coal & Sorbent Hnd.Foundations $0 $5,790 $7,633 $0 $13,423 $1,259 $0 $2,202 $16,884 $31 SUBTOTAL 1. $24,398 $6,211 $14,389 $0 $44,998 $3,946 $0 $7,342 $56,286 $102 2 COAL & SORBENT PREP & FEED 2.1 Coal Crushing & Drying $2,898 $0 $557 $0 $3,455 $292 $0 $562 $4,309 $8 2.2 Coal Conveyor to Storage $7,421 $0 $1,598 $0 $9,018 $763 $0 $1,467 $11,249 $20 2.3 Coal Injection System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.4 Misc.Coal Prep & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.5 Sorbent Prep Equipment $5,604 $243 $1,148 $0 $6,995 $589 $0 $1,138 $8,721 $16 2.6 Sorbent Storage & Feed $675 $0 $255 $0 $930 $80 $0 $152 $1,162 $2 2.7 Sorbent Injection System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.8 Booster Air Supply System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.9 Coal & Sorbent Feed Foundation $0 $684 $600 $0 $1,284 $119 $0 $210 $1,614 $3 SUBTOTAL 2. $16,598 $927 $4,158 $0 $21,683 $1,844 $0 $3,529 $27,055 $49 3 FEEDWATER & MISC. BOP SYSTEMS 3.1 Feedwater System $27,420 $0 $8,841 $0 $36,261 $3,098 $0 $5,904 $45,263 $82 3.2 Water Makeup & Pretreating $8,525 $0 $2,697 $0 $11,222 $1,025 $0 $2,449 $14,697 $27 3.3 Other Feedwater Subsystems $8,626 $0 $3,541 $0 $12,167 $1,046 $0 $1,982 $15,194 $28 3.4 Service Water Systems $1,707 $0 $893 $0 $2,601 $234 $0 $567 $3,401 $6 3.5 Other Boiler Plant Systems $10,846 $0 $10,254 $0 $21,100 $1,920 $0 $3,453 $26,473 $48 3.6 FO Supply Sys & Nat Gas $354 $0 $413 $0 $767 $69 $0 $125 $961 $2 3.7 Waste Treatment Equipment $5,593 $0 $3,238 $0 $8,831 $850 $0 $1,936 $11,617 $21 3.8 Misc. Equip.(cranes,AirComp.,Comm.) $3,464 $0 $1,072 $0 $4,536 $431 $0 $993 $5,960 $11 SUBTOTAL 3. $66,534 $0 $30,948 $0 $97,483 $8,673 $0 $17,410 $123,565 $225 4 PC BOILER 4.1 PC Boiler & Accessories $230,968 $0 $131,605 $0 $362,573 $34,895 $0 $39,747 $437,215 $795 4.2 SCR (w/4.1) $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.3 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.4 Boiler BoP (w/ ID Fans) $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.5 Primary Air System w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.6 Secondary Air System w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.8 Major Component Rigging $0 w/4.1 w/4.1 $0 $0 $0 $0 $0 $0 $0 4.9 Boiler Foundations $0 w/14.1 w/14.1 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 4. $230,968 $0 $131,605 $0 $362,573 $34,895 $0 $39,747 $437,215 $795 

### TOTAL PLANT COST SUMMARY

### Updated Costs (J une 2011 Basis)



# 34 Exhibit 4
- 12 Case 12 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 5 FLUE GAS CLEANUP 5.1 Absorber Vessels & Accessories $84,608 $0 $18,090 $0 $102,698 $9,534 $0 $11,223 $123,455 $224 5.2 Other FGD $4,415 $0 $4,969 $0 $9,384 $889 $0 $1,027 $11,301 $21 5.3 Bag House & Accessories $24,339 $0 $15,340 $0 $39,679 $3,729 $0 $4,341 $47,749 $87 5.4 Other Particulate Removal Materials $1,647 $0 $1,750 $0 $3,398 $322 $0 $372 $4,091 $7 5.5 Gypsum Dewatering System $6,779 $0 $1,144 $0 $7,923 $734 $0 $866 $9,522 $17 5.6 Mercury Removal System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5.9 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 5. $121,788 $0 $41,294 $0 $163,082 $15,208 $0 $17,829 $196,119 $357 5B CO2 REMOVAL & COMPRESSION 5B.1 CO2 Removal System $250,513 $0 $75,544 $0 $326,057 $30,367 $65,211 $84,327 $505,963 $920 5B.2 CO2 Compression & Drying $48,646 $0 $18,072 $0 $66,717 $6,228 $0 $14,589 $87,534 $159 SUBTOTAL 5. $299,159 $0 $93,615 $0 $392,774 $36,595 $65,211 $98,916 $593,497 $1,079 6 COMBUSTION TURBINE/ACCESSORIES 6.1 Combustion Turbine Generator N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 6.2 Open $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.3 Compressed Air Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.9 Combustion Turbine Foundations $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 6. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7 HRSG, DUCTING & STACK 7.1 Heat Recovery Steam Generator N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 7.2 HRSG Accessories $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7.3 Ductwork $11,169 $0 $7,050 $0 $18,219 $1,539 $0 $2,964 $22,722 $41 7.4 Stack $10,097 $0 $5,868 $0 $15,965 $1,499 $0 $1,746 $19,210 $35 7.9 Duct & Stack Foundations $0 $1,101 $1,307 $0 $2,408 $225 $0 $527 $3,159 $6 SUBTOTAL 7. $21,266 $1,101 $14,225 $0 $36,592 $3,263 $0 $5,237 $45,092 $82 8 STEAM TURBINE GENERATOR 8.1 Steam TG & Accessories $73,312 $0 $9,024 $0 $82,336 $7,228 $0 $8,956 $98,521 $179 8.2 Turbine Plant Auxiliaries $461 $0 $981 $0 $1,442 $138 $0 $158 $1,738 $3 8.3 Condenser & Auxiliaries $6,641 $0 $2,431 $0 $9,072 $847 $0 $992 $10,911 $20 8.4 Steam Piping $28,525 $0 $12,674 $0 $41,199 $3,158 $0 $6,653 $51,010 $93 8.9 TG Foundations $0 $1,375 $2,270 $0 $3,645 $343 $0 $798 $4,786 $9 SUBTOTAL 8. $108,939 $1,375 $27,379 $0 $137,694 $11,714 $0 $17,557 $166,965 $304 9 COOLING WATER SYSTEM 9.1 Cooling Towers $18,626 $0 $5,760 $0 $24,386 $2,272 $0 $2,666 $29,324 $53 9.2 Circulating Water Pumps $3,730 $0 $297 $0 $4,026 $343 $0 $437 $4,807 $9 9.3 Circ.Water System Auxiliaries $949 $0 $126 $0 $1,075 $99 $0 $117 $1,292 $2 9.4 Circ.Water Piping $0 $7,999 $7,244 $0 $15,242 $1,349 $0 $2,489 $19,080 $35 9.5 Make-up Water System $798 $0 $1,026 $0 $1,824 $168 $0 $299 $2,291 $4 9.6 Component Cooling Water Sys $774 $0 $594 $0 $1,368 $125 $0 $224 $1,717 $3 9.9 Circ.Water System Foundations & Structures $0 $4,237 $7,035 $0 $11,272 $1,062 $0 $2,467 $14,801 $27 SUBTOTAL 9. $24,877 $12,235 $22,081 $0 $59,194 $5,419 $0 $8,699 $73,311 $133

### Updated Costs (J une 2011 Basis)



# 35 Exhibit 4
- 12 Case 12 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 10 ASH/SPENT SORBENT HANDLING SYS 10.1 Ash Coolers N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.2 Cyclone Ash Letdown N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.3 HGCU Ash Letdown N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.4 High Temperature Ash Piping N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.5 Other Ash Recovery Equipment N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 10.6 Ash Storage Silos $851 $0 $2,604 $0 $3,455 $332 $0 $379 $4,165 $8 10.7 Ash Transport & Feed Equipment $5,653 $0 $5,604 $0 $11,257 $1,037 $0 $1,229 $13,524 $25 10.8 Misc. Ash Handling Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.9 Ash/Spent Sorbent Foundation $0 $192 $236 $0 $429 $40 $0 $94 $563 $1 SUBTOTAL 10. $6,504 $192 $8,445 $0 $15,141 $1,409 $0 $1,702 $18,252 $33 11 ACCESSORY ELECTRIC PLANT 11.1 Generator Equipment $2,100 $0 $336 $0 $2,436 $218 $0 $199 $2,854 $5 11.2 Station Service Equipment $5,816 $0 $1,950 $0 $7,766 $722 $0 $637 $9,125 $17 11.3 Switchgear & Motor Control $6,676 $0 $1,160 $0 $7,836 $725 $0 $856 $9,416 $17 11.4 Conduit & Cable Tray $0 $4,578 $14,791 $0 $19,369 $1,808 $0 $3,176 $24,353 $44 11.5 Wire & Cable $0 $8,717 $15,582 $0 $24,299 $1,951 $0 $3,937 $30,187 $55 11.6 Protective Equipment $306 $0 $1,063 $0 $1,370 $131 $0 $150 $1,652 $3 11.7 Standby Equipment $1,596 $0 $37 $0 $1,633 $150 $0 $178 $1,961 $4 11.8 Main Power Transformers $15,723 $0 $226 $0 $15,949 $1,209 $0 $1,716 $18,874 $34 11.9 Electrical Foundations $0 $394 $1,002 $0 $1,396 $132 $0 $306 $1,834 $3 SUBTOTAL 11. $32,218 $13,689 $36,147 $0 $82,053 $7,046 $0 $11,156 $100,255 $182 12 INSTRUMENTATION & CONTROL 12.1 PC Control Equipment w/12.7 $0 w/12.7 $0 $0 $0 $0 $0 $0 $0 12.2 Combustion Turbine Control N/A $0 N/A $0 $0 $0 $0 $0 $0 $0 12.3 Steam Turbine Control w/8.1 $0 w/8.1 $0 $0 $0 $0 $0 $0 $0 12.4 Other Major Component Control $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 12.5 Signal Processing Equipment w/12.7 $0 w/12.7 $0 $0 $0 $0 $0 $0 $0 12.6 Control Boards,Panels & Racks $605 $0 $370 $0 $975 $91 $49 $167 $1,282 $2 12.7 Distributed Control System Equipment $6,110 $0 $1,090 $0 $7,199 $665 $360 $822 $9,046 $16 12.8 Instrument Wiring & Tubing $3,684 $0 $6,704 $0 $10,388 $842 $519 $1,762 $13,511 $25 12.9 Other I & C Equipment $1,726 $0 $3,997 $0 $5,724 $547 $286 $656 $7,213 $13 SUBTOTAL 12. $12,125 $0 $12,161 $0 $24,286 $2,145 $1,214 $3,408 $31,053 $56

### Updated Costs (J une 2011 Basis)



# 36 Exhibit 4
- 12 Case 12 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 13 IMPROVEMENTS TO SITE 13.1 Site Preparation $0 $63 $1,336 $0 $1,399 $136 $0 $307 $1,843 $3 13.2 Site Improvements $0 $2,085 $2,755 $0 $4,841 $480 $0 $1,064 $6,385 $12 13.3 Site Facilities $3,737 $0 $3,921 $0 $7,658 $762 $0 $1,684 $10,104 $18 SUBTOTAL 13. $3,737 $2,148 $8,012 $0 $13,898 $1,379 $0 $3,055 $18,332 $33 14 BUILDINGS & STRUCTURES 14.1 Boiler Building $0 $10,604 $9,319 $0 $19,923 $1,753 $0 $3,251 $24,928 $45 14.2 Turbine Building $0 $15,346 $14,292 $0 $29,638 $2,615 $0 $4,838 $37,091 $67 14.3 Administration Building $0 $771 $814 $0 $1,585 $141 $0 $259 $1,985 $4 14.4 Circulation Water Pumphouse $0 $210 $167 $0 $377 $33 $0 $62 $472 $1 14.5 Water Treatment Buildings $0 $1,063 $969 $0 $2,032 $179 $0 $332 $2,543 $5 14.6 Machine Shop $0 $515 $346 $0 $862 $75 $0 $140 $1,077 $2 14.7 Warehouse $0 $349 $350 $0 $699 $62 $0 $114 $876 $2 14.8 Other Buildings & Structures $0 $285 $243 $0 $528 $46 $0 $86 $661 $1 14.9 Waste Treating Building & Str. $0 $547 $1,657 $0 $2,204 $205 $0 $361 $2,770 $5 SUBTOTAL 14. $0 $29,691 $28,158 $0 $57,849 $5,109 $0 $9,444 $72,402 $132

TOTAL COST $969,114 $67,569 $472,617 $0 $1,509,300 $138,644 $66,426 $245,029 $1,959,399 $3,563 

### Owner's Costs Preproduction Costs 6 Months All Labor $12,556 $23 1 Month Maintenance Materials $1,869 $3 1 Month Non-fuel Consumables $2,931 $5 1 Month Waste Disposal $503 $1 25% of 1 Months Fuel Cost at 100% CF $3,542 $6 2% of TPC $39,188 $71 Total $60,589 $110 Inventory Capital 60 day supply of fuel and consumables at 100% CF $33,451 $61 0.5% of TPC (spare parts) $9,797 $18 Total $43,248 $79

Initial Cost for Catalyst and Chemicals $3,784 $7 Land $900 $2 Other Owner's Costs $293,910 $534

Financing Costs $52,904 $96 

### Total Overnight Costs (TOC) $2,414,734 $4,391 TASC Multiplier (IOU, high-risk, 35 year) 1.140 

### Total As-Spent Cost (TASC) $2,752,796 $5,005

### Updated Costs (J une 2011 Basis)



# 37 Exhibit 4
- 13 Case 12 O&M costs

INITIAL & ANNUAL O&M EXPENSES Cost Base (Jun): 2011 Case 12 - 1x550 MWnet Super-Critical PC w/ CO2 Capture Heat Rate-net (Btu/kWh): 12,002 MWe-net: 550 Capacity Factor (%): 85 OPERATING & MAINTENANCE LABOR Operating Labor Operating Labor Rate (base): 39.70 $/hour Operating Labor Burden: 30.00 % of base Labor O-H Charge Rate: 25.00 % of labor

Total Operating Labor Requirements(O.J.)per Shift: 1 unit/mod. Plant Skilled Operator 2.0 2.0 Operator 11.3 11.3 Foreman 1.0 1.0 Lab Tech's, etc. 2.0 2.0 TOTAL-O.J.'s 16.3 16.3 Annual Cost Annual Unit Cost $ $/kW-net Annual Operating Labor Cost $7,384,208 $13.427 Maintenance Labor Cost $12,705,913 $23.103 Administrative & Support Labor $5,022,530 $9.133 Property Taxes and Insurance $39,024,956 $70.960 TOTAL FIXED OPERATING COSTS $64,137,607 $116.622 VARIABLE OPERATING COSTS $/kWh-net Maintenance Material Cost $19,058,869 $0.00465

Consumables Consumption Unit Initial Fill Initial Fill /Day Cost Cost
Water(/1000 gallons) 0 7,324 1.67 $0 $3,803,686 $0.00093

Chemicals

MU & WT Chem.(lbs) 0 35,452 0.27 $0 $2,945,963 $0.00072 Limestone (ton) 0 687 33.48 $0 $7,135,313 $0.00174 Carbon (Mercury Removal) lb 0 0.00 1.63 $0 $0 $0.00000 MEA Solvent (ton) 1,028 1 3,481.91 $3,578,512 $1,574,157 $0.00038 NaOH (tons) 73 7 671.16 $48,724 $1,511,672 $0.00037 H2SO4 (tons) 69 7 214.78 $14,880 $461,637 $0.00011 Corrosion Inhibitor 0 0 0.00 $142,156 $6,769 $0.00000 Activated Carbon (lb) 0 1,740.69 1.63 $0 $877,708 $0.00021 Ammonia (19% NH3) ton 0 102 330.00 $0 $10,400,390 $0.00254 Subtotal Chemicals $3,784,272 $24,913,611 $0.00608

Other

Supplemental Fuel (MBtu) 0 0 0.00 $0 $0 $0.00000 SCR Catalyst (m3) w/equip. 0 8,938.80 $0 $1,183,917 $0.00029 Emission Penalties 0 0 0.00 $0 $0 $0.00000 Subtotal Other $0 $1,183,917 $0.00029

Waste Disposal

Fly Ash (ton) 0 527 25.11 $0 $4,103,318 $0.00100 Bottom Ash (ton) 0 132 25.11 $0 $1,025,830 $0.00025 Subtotal-Waste Disposal $0 $5,129,148 $0.00125

By-products & Emissions

Gypsum (tons) 0 1,062 0.00 $0 $0 $0.00000 Subtotal By-Products $0 $0 $0.00000

TOTAL VARIABLE OPERATING COSTS $3,784,272 $54,089,231 $0.01321

Fuel (ton) 0 6,790 68.60 $0 $144,504,012 $0.03529

### Updated Costs (J une 2011 Basis)



# 38 Exhibit 4
- 14 Case 13 capital and owner’s costs

Client: USDOE/NETL Report Date: 2012-Jun-12 Project: Bituminous Baseline Study

Case: Case 13 1x555 MWnet 2x1 7FB NGCC Plant Size: 555.1 MW,net Estimate Type: Cost Base (Jun) 2011 ($x1000) Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 1 COAL & SORBENT HANDLING 1.1 Coal Receive & Unload $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.2 Coal Stackout & Reclaim $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.3 Coal Conveyors & Yd Crush $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.4 Other Coal Handling $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.5 Sorbent Receive & Unload $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.6 Sorbent Stackout & Reclaim $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.7 Sorbent Conveyors $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.8 Other Sorbent Handling $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.9 Coal & Sorbent Hnd.Foundations $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 1. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2 COAL & SORBENT PREP & FEED 2.1 Coal Crushing & Drying $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.2 Prepared Coal Storage & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.3 Slurry Prep & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.4 Misc.Coal Prep & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.5 Sorbent Prep Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.6 Sorbent Storage & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.7 Sorbent Injection System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.8 Booster Air Supply System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.9 Coal & Sorbent Feed Foundation $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 2. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 3 FEEDWATER & MISC. BOP SYSTEMS 3.1 Feedwater System $2,910 $3,013 $2,461 $0 $8,384 $675 $0 $1,359 $10,417 $19 3.2 Water Makeup & Pretreating $1,786 $185 $917 $0 $2,887 $238 $0 $625 $3,750 $7 3.3 Other Feedwater Subsystems $1,363 $451 $376 $0 $2,190 $169 $0 $354 $2,713 $5 3.4 Service Water Systems $216 $430 $1,385 $0 $2,031 $173 $0 $441 $2,645 $5 3.5 Other Boiler Plant Systems $1,453 $543 $1,249 $0 $3,245 $264 $0 $526 $4,035 $7 3.6 Natural Gas, incl. pipeline $17,682 $609 $527 $0 $18,817 $1,551 $0 $3,055 $23,424 $42 3.7 Waste Treatment Equipment $624 $0 $361 $0 $985 $85 $0 $214 $1,284 $2 3.8 Misc. Equip.(cranes,AirComp.,Comm.) $1,082 $144 $526 $0 $1,752 $150 $0 $380 $2,282 $4 SUBTOTAL 3. $27,114 $5,374 $7,801 $0 $40,290 $3,305 $0 $6,954 $50,549 $91 4 GASIFIER & ACCESSORIES 4.1 Gasifier, Syngas Cooler & Auxiliaries $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.2 Syngas Cooling $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.3 ASU/Oxidant Compression $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.4 LT Heat Recovery & FG Saturation $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.5 Misc. Gasification Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.6 Other Gasification Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.8 Major Component Rigging $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.9 Gasification Foundations $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 4. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 

### TOTAL PLANT COST SUMMARY

### Updated Costs (J une 2011 Basis)



# 39 Exhibit 4

- 14 Case 13 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW

5A GAS CLEANUP & PIPING 5A.1 MDEA-LT AGR $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.2 Elemental Sulfur Plant $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.3 Mercury Removal $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.4 COS Hydrolysis $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.5 Blowback Gas Systems $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.6 Fuel Gas Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.9 HGCU Foundations $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 5. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5B CO2 REMOVAL & COMPRESSION 5B.1 CO2 Removal System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5B.2 CO2 Compression & Drying $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 5. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6 COMBUSTION TURBINE/ACCESSORIES 6.1 Combustion Turbine Generator $104,200 $0 $5,752 $0 $109,952 $9,079 $0 $11,903 $130,934 $236 6.2 Combustion Turbine Accessories $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.3 Compressed Air Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.9 Combustion Turbine Foundations $0 $823 $890 $0 $1,714 $143 $0 $371 $2,228 $4 SUBTOTAL 6. $104,200 $823 $6,642 $0 $111,666 $9,222 $0 $12,274 $133,162 $240 7 HRSG, DUCTING & STACK 7.1 Heat Recovery Steam Generator $31,620 $0 $5,861 $0 $37,481 $3,114 $0 $4,060 $44,655 $80 7.2 SCR System $1,498 $629 $878 $0 $3,005 $252 $0 $489 $3,745 $7 7.3 Ductwork $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7.4 Stack $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7.9 HRSG,Duct & Stack Foundations $0 $491 $460 $0 $951 $79 $0 $206 $1,237 $2 SUBTOTAL 7. $33,118 $1,120 $7,199 $0 $41,438 $3,445 $0 $4,754 $49,637 $89 8 STEAM TURBINE GENERATOR 8.1 Steam TG & Accessories $31,410 $0 $4,616 $0 $36,026 $2,840 $0 $3,887 $42,752 $77 8.2 Turbine Plant Auxiliaries $194 $0 $442 $0 $636 $54 $0 $69 $759 $1 8.3 Condenser & Auxiliaries $2,680 $0 $1,323 $0 $4,003 $336 $0 $434 $4,773 $9 8.4 Steam Piping $11,371 $0 $4,609 $0 $15,979 $1,089 $0 $2,560 $19,628 $35 8.9 TG Foundations $0 $914 $1,510 $0 $2,424 $205 $0 $526 $3,154 $6 SUBTOTAL 8. $45,655 $914 $12,499 $0 $59,068 $4,524 $0 $7,475 $71,067 $128 9 COOLING WATER SYSTEM 9.1 Cooling Towers $2,740 $0 $830 $0 $3,570 $298 $0 $387 $4,255 $8 9.2 Circulating Water Pumps $1,323 $0 $75 $0 $1,399 $107 $0 $151 $1,656 $3 9.3 Circ.Water System Auxiliaries $112 $0 $15 $0 $127 $11 $0 $14 $151 $0 9.4 Circ.Water Piping $0 $3,476 $787 $0 $4,263 $319 $0 $687 $5,269 $9 9.5 Make-up Water System $285 $0 $366 $0 $650 $54 $0 $106 $810 $1 9.6 Component Cooling Water Sys $224 $267 $172 $0 $663 $53 $0 $107 $823 $1 9.9 Circ.Water System Foundations $0 $1,570 $2,607 $0 $4,176 $353 $0 $906 $5,435 $10 SUBTOTAL 9. $4,684 $5,313 $4,851 $0 $14,847 $1,194 $0 $2,357 $18,398 $33

### Updated Costs (J une 2011 Basis)



# 40 Exhibit 4

- 14 Case 13 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 10 ASH/SPENT SORBENT HANDLING SYS 10.1 Slag Dewatering & Cooling $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.2 Gasifier Ash Depressurization $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.3 Cleanup Ash Depressurization $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.4 High Temperature Ash Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.5 Other Ash Recovery Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.6 Ash Storage Silos $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.7 Ash Transport & Feed Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.8 Misc. Ash Handling Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.9 Ash/Spent Sorbent Foundation $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 10. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 11 ACCESSORY ELECTRIC PLANT 11.1 Generator Equipment $4,948 $0 $2,927 $0 $7,874 $647 $0 $639 $9,160 $17 11.2 Station Service Equipment $1,418 $0 $122 $0 $1,540 $127 $0 $125 $1,791 $3 11.3 Switchgear & Motor Control $1,745 $0 $303 $0 $2,048 $170 $0 $222 $2,439 $4 11.4 Conduit & Cable Tray $0 $912 $2,627 $0 $3,538 $295 $0 $575 $4,408 $8 11.5 Wire & Cable $0 $2,930 $1,666 $0 $4,596 $276 $0 $731 $5,603 $10 11.6 Protective Equipment $0 $661 $2,294 $0 $2,956 $254 $0 $321 $3,531 $6 11.7 Standby Equipment $121 $0 $113 $0 $234 $20 $0 $25 $279 $1 11.8 Main Power Transformers $11,295 $0 $174 $0 $11,469 $779 $0 $1,225 $13,473 $24 11.9 Electrical Foundations $0 $150 $382 $0 $532 $45 $0 $115 $693 $1 SUBTOTAL 11. $19,526 $4,653 $10,608 $0 $34,787 $2,612 $0 $3,978 $41,377 $75 12 INSTRUMENTATION & CONTROL 12.1 IGCC Control Equipment w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 12.2 Combustion Turbine Control w/6.1 $0 w/6.1 $0 $0 $0 $0 $0 $0 $0 12.3 Steam Turbine Control w/8.1 $0 w/8.1 $0 $0 $0 $0 $0 $0 $0 12.4 Other Major Component Control $862 $0 $549 $0 $1,411 $118 $0 $229 $1,759 $3 12.5 Signal Processing Equipment w/12.7 $0 w/12.7 $0 $0 $0 $0 $0 $0 $0 12.6 Control Boards,Panels & Racks $258 $0 $157 $0 $415 $35 $0 $67 $517 $1 12.7 Computer & Accessories $4,123 $0 $126 $0 $4,249 $349 $0 $460 $5,058 $9 12.8 Instrument Wiring & Tubing $0 $767 $1,357 $0 $2,124 $153 $0 $342 $2,618 $5 12.9 Other I & C Equipment $1,537 $0 $3,559 $0 $5,096 $436 $0 $553 $6,085 $11 SUBTOTAL 12. $6,780 $767 $5,748 $0 $13,295 $1,091 $0 $1,651 $16,038 $29

### Updated Costs (J une 2011 Basis)



# 41 Exhibit 4

- 14 Case 13 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 13 IMPROVEMENTS TO SITE 13.1 Site Preparation $0 $104 $2,199 $0 $2,303 $201 $0 $501 $3,004 $5 13.2 Site Improvements $0 $949 $1,254 $0 $2,203 $196 $0 $480 $2,878 $5 13.3 Site Facilities $1,938 $0 $2,033 $0 $3,970 $354 $0 $865 $5,189 $9 SUBTOTAL 13. $1,938 $1,053 $5,485 $0 $8,476 $751 $0 $1,845 $11,072 $20 14 BUILDINGS & STRUCTURES 14.1 Combustion Turbine Area $0 $283 $149 $0 $432 $33 $0 $70 $535 $1 14.2 Steam Turbine Building $0 $2,363 $3,144 $0 $5,507 $443 $0 $892 $6,842 $12 14.3 Administration Building $0 $545 $369 $0 $914 $71 $0 $148 $1,132 $2 14.4 Circulation Water Pumphouse $0 $182 $90 $0 $272 $21 $0 $44 $337 $1 14.5 Water Treatment Buildings $0 $379 $345 $0 $724 $57 $0 $117 $899 $2 14.6 Machine Shop $0 $472 $302 $0 $774 $60 $0 $125 $960 $2 14.7 Warehouse $0 $305 $184 $0 $489 $38 $0 $79 $606 $1 14.8 Other Buildings & Structures $0 $91 $66 $0 $158 $12 $0 $26 $196 $0 14.9 Waste Treating Building & Str. $0 $357 $638 $0 $996 $81 $0 $162 $1,238 $2 SUBTOTAL 14. $0 $4,978 $5,288 $0 $10,265 $817 $0 $1,662 $12,745 $23

TOTAL COST $243,015 $24,995 $66,122 $0 $334,131 $26,960 $0 $42,953 $404,045 $728 

### Owner's Costs Preproduction Costs 6 Months All Labor $3,384 $6 1 Month Maintenance Materials $464 $1 1 Month Non-fuel Consumables $250 $0 1 Month Waste Disposal $0 $0 25% of 1 Months Fuel Cost at 100% CF $4,221 $8 2% of TPC $8,081 $15 Total $16,399 $30 Inventory Capital 60 day supply of consumables at 100% CF $326 $1 0.5% of TPC (spare parts) $2,020 $4 Total $2,346 $4
Initial Cost for Catalyst and Chemicals $0 $0 Land $300 $1 Other Owner's Costs $60,607 $109

Financing Costs $10,909 $20 

### Total Overnight Costs (TOC) $494,606 $891 TASC Multiplier (IOU, low-risk, 33 year) 1.075 

### Total As-Spent Cost (TASC) $531,701 $958

### Updated Costs (J une 2011 Basis)



# 42 Exhibit 4
- 15 Case 13 O&M costs

INITIAL & ANNUAL O&M EXPENSES Cost Base (Jun): 2011 Case 13 - 1x555 MWnet 2x1 7FB NGCC Heat Rate-net (Btu/kWh): 6,798 MWe-net: 555 Capacity Factor (%): 85 OPERATING & MAINTENANCE LABOR Operating Labor Operating Labor Rate (base): 39.70 $/hour Operating Labor Burden: 30.00 % of base Labor O-H Charge Rate: 25.00 % of labor

Total Operating Labor Requirements(O.J.)per 1 unit/mod. Plant

Skilled Operator 1.0 1.0 Operator 2.0 2.0 Foreman 1.0 1.0 Lab Tech's, etc. 1.0 1.0 TOTAL-O.J.'s 5.0 5.0 Annual Cost Annual Unit Cost $ $/kW-net Annual Operating Labor Cost $2,260,518 $4.072 Maintenance Labor Cost $3,153,226 $5.681 Administrative & Support Labor $1,353,436 $2.438 Property Taxes and Insurance $8,080,890 $14.558 TOTAL FIXED OPERATING COSTS $14,848,070 $26.749 VARIABLE OPERATING COSTS $/kWh-net Maintenance Material Cost $4,729,839 $0.00114

Consumables Consumption Unit Initial Fill Initial Fill /Day Cost Cost
Water (/1000 gallons) 0.00 1700.64 1.67 $0 $883,239 $0.00021

Chemicals

MU & WT Chem. (lbs) 0.00 10131.92 0.27 $0 $841,933 $0.00020 MEA Solvent (ton) 0.00 0.00 3481.91 $0 $0 $0.00000 Activated Carbon (lb) 0.00 0.00 1.63 $0 $0 $0.00000 Corrosion Inhibitor 0.00 0.00 0.00 $0 $0 $0.00000 SCR Catalyst (m3) w/equip. 0.07 8938.80 $0 $200,587 $0.00005 Ammonia (19% NH3) ton 0.00 6.06 330.00 $0 $620,695 $0.00015 Subtotal Chemicals $0 $1,663,215 $0.00040

Other

Supplemental Fuel (MBtu) 0.00 0.00 0.00 $0 $0 $0.00000 Gases, N2 etc.(/100scf) 0.00 0.00 0.00 $0 $0 $0.00000 L.P. Steam (/1000 pounds) 0.00 0.00 0.00 $0 $0 $0.00000 Subtotal Other $0 $0 $0.00000

Waste Disposal

Flyash (ton) 0.00 0.00 0.00 $0 $0 $0.00000 Bottom Ash (ton) 0.00 0.00 0.00 $0 $0 $0.00000 Subtotal Waste Disposal $0 $0 $0.00000

By-products

Sulfur (tons) 0.00 0.00 0.00 $0 $0 $0.00000 Subtotal By-products $0 $0 $0.00000

TOTAL VARIABLE OPERATING COSTS $0 $7,276,292 $0.00176

Fuel (MMBtu) 0 90,562 6.13 $0 $172,234,539 $0.04167

### Updated Costs (J une 2011 Basis)



# 43 Exhibit 4
- 16 Case 14 capital and owner’s costs

Client: USDOE/NETL Report Date: 2012-Jun-12 Project: Bituminous Baseline Study

Case: Case 14 1x475 MWnet 2x1 7FB NGCC w/ CO2 Capture Plant Size: 473.6 MW,net Estimate Type: Cost Base (Jun) 2011 ($x1000) Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 1 COAL & SORBENT HANDLING 1.1 Coal Receive & Unload $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.2 Coal Stackout & Reclaim $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.3 Coal Conveyors & Yd Crush $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.4 Other Coal Handling $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.5 Sorbent Receive & Unload $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.6 Sorbent Stackout & Reclaim $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.7 Sorbent Conveyors $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.8 Other Sorbent Handling $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 1.9 Coal & Sorbent Hnd.Foundations $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 1. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2 COAL & SORBENT PREP & FEED 2.1 Coal Crushing & Drying $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.2 Prepared Coal Storage & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.3 Slurry Prep & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.4 Misc.Coal Prep & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.5 Sorbent Prep Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.6 Sorbent Storage & Feed $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.7 Sorbent Injection System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.8 Booster Air Supply System $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 2.9 Coal & Sorbent Feed Foundation $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 2. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 3 FEEDWATER & MISC. BOP SYSTEMS 3.1 Feedwater System $2,910 $3,013 $2,461 $0 $8,384 $675 $0 $1,359 $10,417 $22 3.2 Water Makeup & Pretreating $2,586 $267 $1,328 $0 $4,181 $345 $0 $905 $5,432 $11 3.3 Other Feedwater Subsystems $1,363 $451 $376 $0 $2,190 $169 $0 $354 $2,713 $6 3.4 Service Water Systems $312 $623 $2,007 $0 $2,942 $250 $0 $638 $3,830 $8 3.5 Other Boiler Plant Systems $2,104 $786 $1,809 $0 $4,699 $383 $0 $762 $5,844 $12 3.6 Natural Gas, incl. pipeline $17,663 $574 $497 $0 $18,733 $1,544 $0 $3,042 $23,320 $49 3.7 Waste Treatment Equipment $903 $0 $523 $0 $1,426 $123 $0 $310 $1,859 $4 3.8 Misc. Equip.(cranes,AirComp.,Comm.) $1,096 $146 $533 $0 $1,776 $152 $0 $385 $2,313 $5 SUBTOTAL 3. $28,939 $5,860 $9,532 $0 $44,331 $3,641 $0 $7,756 $55,728 $118 4 GASIFIER & ACCESSORIES 4.1 Gasifier, Syngas Cooler & Auxiliaries $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.2 Syngas Cooling $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.3 ASU/Oxidant Compression $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.4 LT Heat Recovery & FG Saturation $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.5 Misc. Gasification Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.6 Other Gasification Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.8 Major Component Rigging $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 4.9 Gasification Foundations $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 4. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 

### TOTAL PLANT COST SUMMARY

### Updated Costs (J une 2011 Basis)



# 44 Exhibit 4

- 16 Case 14 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 5A GAS CLEANUP & PIPING 5A.1 MDEA-LT AGR $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.2 Elemental Sulfur Plant $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.3 Mercury Removal $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.4 COS Hydrolysis $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.5 Blowback Gas Systems $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.6 Fuel Gas Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5A.9 HGCU Foundations $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 5. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 5B CO2 REMOVAL & COMPRESSION 5B.1 CO2 Removal System $129,456 $0 $39,010 $0 $168,466 $14,056 $33,693 $43,243 $259,459 $548 5B.2 CO2 Compression & Drying $19,999 $0 $7,655 $0 $27,654 $2,313 $0 $5,993 $35,960 $76 SUBTOTAL 5. $149,455 $0 $46,665 $0 $196,120 $16,370 $33,693 $49,237 $295,419 $624 6 COMBUSTION TURBINE/ACCESSORIES 6.1 Combustion Turbine Generator $104,200 $0 $5,752 $0 $109,952 $9,079 $0 $11,903 $130,934 $276 6.2 Combustion Turbine Accessories $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.3 Compressed Air Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 6.9 Combustion Turbine Foundations $0 $823 $890 $0 $1,714 $143 $0 $371 $2,228 $5 SUBTOTAL 6. $104,200 $823 $6,642 $0 $111,666 $9,222 $0 $12,274 $133,162 $281 7 HRSG, DUCTING & STACK 7.1 Heat Recovery Steam Generator $30,130 $0 $5,580 $0 $35,710 $2,967 $0 $3,868 $42,544 $90 7.2 SCR System $1,498 $629 $878 $0 $3,005 $252 $0 $489 $3,745 $8 7.3 Ductwork $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7.4 Stack $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 7.9 HRSG,Duct & Stack Foundations $0 $393 $368 $0 $761 $63 $0 $165 $989 $2 SUBTOTAL 7. $31,628 $1,022 $6,826 $0 $39,476 $3,282 $0 $4,521 $47,279 $100 8 STEAM TURBINE GENERATOR 8.1 Steam TG & Accessories $24,610 $0 $4,149 $0 $28,759 $2,271 $0 $3,103 $34,133 $72 8.2 Turbine Plant Auxiliaries $170 $0 $379 $0 $550 $47 $0 $60 $656 $1 8.3 Condenser & Auxiliaries $1,560 $0 $1,057 $0 $2,617 $220 $0 $284 $3,121 $7 8.4 Steam Piping $11,371 $0 $4,609 $0 $15,979 $1,089 $0 $2,560 $19,628 $41 8.9 TG Foundations $0 $730 $1,206 $0 $1,936 $163 $0 $420 $2,519 $5 SUBTOTAL 8. $37,711 $730 $11,398 $0 $49,840 $3,791 $0 $6,426 $60,057 $127 9 COOLING WATER SYSTEM 9.1 Cooling Towers $4,290 $0 $1,300 $0 $5,590 $466 $0 $606 $6,662 $14 9.2 Circulating Water Pumps $2,063 $0 $127 $0 $2,190 $167 $0 $236 $2,593 $5 9.3 Circ.Water System Auxiliaries $164 $0 $22 $0 $185 $15 $0 $20 $221 $0 9.4 Circ.Water Piping $0 $5,085 $1,151 $0 $6,236 $467 $0 $1,006 $7,709 $16 9.5 Make-up Water System $389 $0 $500 $0 $889 $74 $0 $144 $1,107 $2 9.6 Component Cooling Water Sys $327 $391 $251 $0 $969 $77 $0 $157 $1,204 $3 9.9 Circ.Water System Foundations $0 $2,306 $3,829 $0 $6,135 $518 $0 $1,330 $7,983 $17 SUBTOTAL 9. $7,233 $7,782 $7,180 $0 $22,195 $1,785 $0 $3,499 $27,478 $58

### Updated Costs (J une 2011 Basis)



# 45 Exhibit 4

- 16 Case 14 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 10 ASH/SPENT SORBENT HANDLING SYS 10.1 Slag Dewatering & Cooling $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.2 Gasifier Ash Depressurization $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.3 Cleanup Ash Depressurization $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.4 High Temperature Ash Piping $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.5 Other Ash Recovery Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.6 Ash Storage Silos $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.7 Ash Transport & Feed Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.8 Misc. Ash Handling Equipment $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 10.9 Ash/Spent Sorbent Foundation $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SUBTOTAL 10. $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 11 ACCESSORY ELECTRIC PLANT 11.1 Generator Equipment $6,533 $0 $3,865 $0 $10,398 $854 $0 $844 $12,096 $26 11.2 Station Service Equipment $2,323 $0 $200 $0 $2,523 $208 $0 $205 $2,936 $6 11.3 Switchgear & Motor Control $2,859 $0 $497 $0 $3,356 $278 $0 $363 $3,997 $8 11.4 Conduit & Cable Tray $0 $1,494 $4,304 $0 $5,798 $483 $0 $942 $7,224 $15 11.5 Wire & Cable $0 $4,801 $2,730 $0 $7,531 $453 $0 $1,198 $9,182 $19 11.6 Protective Equipment $0 $661 $2,294 $0 $2,956 $254 $0 $321 $3,531 $7 11.7 Standby Equipment $115 $0 $107 $0 $223 $19 $0 $24 $266 $1 11.8 Main Power Transformers $12,694 $0 $163 $0 $12,857 $873 $0 $1,373 $15,103 $32 11.9 Electrical Foundations $0 $140 $356 $0 $496 $42 $0 $108 $646 $1 SUBTOTAL 11. $24,526 $7,096 $14,516 $0 $46,138 $3,463 $0 $5,378 $54,979 $116 12 INSTRUMENTATION & CONTROL 12.1 IGCC Control Equipment w/4.1 $0 w/4.1 $0 $0 $0 $0 $0 $0 $0 12.2 Combustion Turbine Control w/6.1 $0 w/6.1 $0 $0 $0 $0 $0 $0 $0 12.3 Steam Turbine Control w/8.1 $0 w/8.1 $0 $0 $0 $0 $0 $0 $0 12.4 Other Major Component Control $936 $0 $596 $0 $1,532 $129 $77 $261 $1,997 $4 12.5 Signal Processing Equipment w/12.7 $0 w/12.7 $0 $0 $0 $0 $0 $0 $0 12.6 Control Boards,Panels & Racks $280 $0 $171 $0 $451 $38 $23 $77 $588 $1 12.7 Computer & Accessories $4,475 $0 $137 $0 $4,612 $379 $231 $522 $5,743 $12 12.8 Instrument Wiring & Tubing $0 $833 $1,473 $0 $2,306 $166 $115 $388 $2,975 $6 12.9 Other I & C Equipment $1,668 $0 $3,863 $0 $5,531 $473 $277 $628 $6,909 $15 SUBTOTAL 12. $7,359 $833 $6,239 $0 $14,431 $1,184 $722 $1,875 $18,212 $38

### Updated Costs (J une 2011 Basis)



# 46 Exhibit 4

- 16 Case 14 capital and owner’s costs (continued)

Acct Equipment Material Labor Bare Erected Eng'g CM Contingencies TOTAL PLANT COST No. Item/Description Cost Cost Direct Indirect Cost $ H.O.& Fee Process Project $ $/kW 13 IMPROVEMENTS TO SITE 13.1 Site Preparation $0 $104 $2,202 $0 $2,306 $201 $0 $501 $3,008 $6 13.2 Site Improvements $0 $950 $1,255 $0 $2,206 $196 $0 $480 $2,882 $6 13.3 Site Facilities $1,940 $0 $2,035 $0 $3,976 $354 $0 $866 $5,196 $11 SUBTOTAL 13. $1,940 $1,054 $5,493 $0 $8,487 $752 $0 $1,848 $11,087 $23 14 BUILDINGS & STRUCTURES 14.1 Combustion Turbine Area $0 $283 $149 $0 $432 $33 $0 $70 $535 $1 14.2 Steam Turbine Building $0 $1,964 $2,613 $0 $4,577 $368 $0 $742 $5,687 $12 14.3 Administration Building $0 $553 $375 $0 $928 $72 $0 $150 $1,150 $2 14.4 Circulation Water Pumphouse $0 $176 $87 $0 $263 $20 $0 $42 $326 $1 14.5 Water Treatment Buildings $0 $549 $500 $0 $1,049 $83 $0 $170 $1,302 $3 14.6 Machine Shop $0 $480 $307 $0 $787 $61 $0 $127 $975 $2 14.7 Warehouse $0 $310 $187 $0 $497 $38 $0 $80 $616 $1 14.8 Other Buildings & Structures $0 $93 $68 $0 $160 $13 $0 $26 $199 $0 14.9 Waste Treating Building & Str. $0 $363 $648 $0 $1,011 $82 $0 $164 $1,258 $3 SUBTOTAL 14. $0 $4,771 $4,934 $0 $9,705 $771 $0 $1,571 $12,048 $25

TOTAL COST $392,991 $29,971 $119,426 $0 $542,389 $44,261 $34,415 $94,385 $715,450 $1,511 

### Owner's Costs Preproduction Costs 6 Months All Labor $4,924 $10 1 Month Maintenance Materials $738 $2 1 Month Non-fuel Consumables $446 $1 1 Month Waste Disposal $0 $0 25% of 1 Months Fuel Cost at 100% CF $4,221 $9 2% of TPC $14,309 $30 Total $24,638 $52 Inventory Capital 60 day supply of consumables at 100% CF $599 $1 0.5% of TPC (spare parts) $3,577 $8 Total $4,177 $9
Initial Cost for Catalyst and Chemicals $1,247 $3 Land $300 $1 Other Owner's Costs $107,318 $227

Financing Costs $19,317 $41 

### Total Overnight Costs (TOC) $872,447 $1,842 TASC Multiplier (IOU, high-risk, 33 year) 1.078 

### Total As-Spent Cost (TASC) $940,497 $1,986

### Updated Costs (J une 2011 Basis)



# 47 Exhibit 4
- 17 Case 14 O&M costs

INITIAL & ANNUAL O&M EXPENSES Cost Base (Jun): 2011 Case 14 - 1x475 MWnet 2x1 7FB NGCC w/ CO2 Capture Heat Rate-net (Btu/kWh): 7,968 MWe-net: 474 Capacity Factor (%): 85 OPERATING & MAINTENANCE LABOR Operating Labor Operating Labor Rate (base): 39.70 $/hour Operating Labor Burden: 30.00 % of base Labor O-H Charge Rate: 25.00 % of labor

Total Operating Labor Requirements(O.J.)per Shift: 1 unit/mod. Plant

Skilled Operator 1.0 1.0 Operator 3.3 3.3 Foreman 1.0 1.0 Lab Tech's, etc. 1.0 1.0 TOTAL-O.J.'s 6.3 6.3 Annual Cost Annual Unit Cost $ $/kW-net Annual Operating Labor Cost $2,861,816 $6.043 Maintenance Labor Cost $5,016,493 $10.593 Administrative & Support Labor $1,969,577 $4.159 Property Taxes and Insurance $14,309,003 $30.215 TOTAL FIXED OPERATING COSTS $24,156,889 $51.010 VARIABLE OPERATING COSTS $/kWh-net Maintenance Material Cost $7,524,739 $0.00213

Consumables Consumption Unit Initial Fill Initial Fill /Day Cost Cost
Water (/1000 gallons) 0.00 2,865.60 1.67 $0 $1,488,269 $0.00042

Chemicals

MU & WT Chem.(lbs) 0.00 17,072.41 0.27 $0 $1,418,668 $0.00040 MEA Solvent (ton) 344.71 0.48 3,481.91 $1,200,254 $522,944 $0.00015 Activated Carbon (lb) 0.00 578.27 1.63 $0 $291,580 $0.00008 Corrosion Inhibitor 0.00 0.00 0.00 $47,225 $2,249 $0.00000 SCR Catalyst (m3) w/equip. 0.07 8,938.80 $0 $200,587 $0.00006 Ammonia (19% NH3) (ton) 0.00 6.06 330.00 $0 $620,695 $0.00018 Subtotal Chemicals $1,247,479 $3,056,721 $0.00087

Other

Supplemental Fuel (MBtu) 0.00 0.00 0.00 $0 $0 $0.00000 Gases,N2 etc. (/100scf) 0.00 0.00 0.00 $0 $0 $0.00000 L.P. Steam (/1000 pounds) 0.00 0.00 0.00 $0 $0 $0.00000 Subtotal Other $0 $0 $0.00000

Waste Disposal

Flyash (ton) 0.00 0.00 0.00 $0 $0 $0.00000 Bottom Ash (ton) 0.00 0.00 0.00 $0 $0 $0.00000 Subtotal Waste Disposal $0 $0 $0.00000

By-products

Sulfur (tons) 0.00 0.00 0.00 $0 $0 $0.00000 Subtotal By-products $0 $0 $0.00000

TOTAL VARIABLE OPERATING COSTS $1,247,479 $12,069,729 $0.00342

Fuel (MMBtu) 0 90,562 6.13 $0 $172,233,257 $0.04884

### Updated Costs (J une 2011 Basis)



# 48 

# 5 Summary of Results
The TOC
, COE, CO2 

# capture, and CO2 

# avoided costs are summarized in Exhibit 5

- 1 for Cases 1, 2, 9, 10, 11, 12, 13 and 14. The previous values (2007 dollar cost basis) are included for reference and the values with and without T&S are shown for the capture cases. The difference in T&S costs reflects the change in methodology and is currently based on a value of $ 10/tonne CO2 

# . The 2011 COE by cost component is shown in Exhibit 5

-2

. The COE increase from 2007 to 2011 averages 3 7 percent for the coal based technologies and 3 percent for the two natural gas based technologies. The cost differences are attributed to the following:

**•** An increase in the capital component of COE of 20

-24 percent for all technologies and fuel types.

**•** An increase in the fixed O&M cost component of COE of approximately 20 percent for all technologies and fuel types. Labor costs increased by about 15 percent, and the fixed O&M costs are also strongly aligned with the capital costs, thus the similar increase.

**•** An increase in the variable O&M cost component of 28

- 35 percent for the IGCC and NGCC cases and 52

-55 percent for the PC cases. The higher PC variable O&M cost increase is due primarily to the large increase in ammonia unit cost relative to 2007 (a factor of 2.5).

**•** An increase in the fuel component of COE of 80 percent for the coal based cases and a decrease of 3 percent for natural gas based cases.

**•** An increase in the T&S component of COE of 62

- 86 percent for coal

-based capture cases and 20 percent for the natural gas based capture case. The differences result from escalation and the new T&S methodology that assumes a cost of $ 10/tonne CO2 

# . The decrease in fuel cost largely offsets the increase in the other COE components for the NGCC cases, resulting in only a small increase in the 2011 COE. The large increase in coal cost adds to the other COE cost component increases, resulting in the 30

-40 percent increase in the 2011 COE.
The CO2 

# capture and avoided costs are shown in Exhibit 5

- 3 for each of the capture cases. The CO2 

# capture cost and the avoided cost using the analogous technology as the reference case both

reflect the relative increases in COE of the non

-capture and capture cases from 2007 to 2011. To illustrate, the cost difference between the IGCC capture and non

-capture cases in 2007 dollars was $29.29/MWh and in 2011 dollars was $40

. 32/MWh. This 38 percent increase in cost differential is reflected in the 38 percent increase in CO2 

# capture and avoided (analogous technology reference case). The cost of CO2 

# avoided using the SC PC non

-capture reference case exhibits a similar trend except for the NGCC capture case. The SC PC non

-capture reference case experienced a nearly 40 percent COE increase from 2007 to 2011 dollars , but the NGCC capture case experienced only a 4 percent increase (mostly due to the lower fuel cost). The result is a significantly lower cost of CO2 

# avoided ($1 2/tonne) for NGCC when comparing to the SC PC non

-capture reference.

### Updated Costs (J une 2011 Basis)



# 49 Exhibit 5

- 1 Summary of results using June 2011 cost basis

Case TOC, MM$ TOC, $/kW COE (w/o TS&M), $/MWh COE (w/TS&M),

$/MWh CO2 

# Captured Cost, $/tonne CO2 

# Avoided Cost, $/tonne (Like Tech. Ref.) CO2 

# Avoided Cost, $/tonne (SC PC Ref.)
June 2011 Cost Basis
1 1,847 2,969 101.16 N/A N/A N/A N/A
2 2,220 4
,086 133.07 1 41.47 48 .0 5 8

. 6 85

.4
9 1,331 2,420 82.27 N/A N/A N/A N/A
10 2,441 4,438 142.04 1 52

. 85 65 .3 95

. 9 105

. 5
11 1,348 2,452 80.95 N/A N/A N/A N/A
12 2,415 4,391 137.28 147 .27 66 .4 95

. 9 95

. 9
13 495 891 59.59 N/A N/A N/A N/A
14 872 1,842 86.58 90

.43 80 .2 95

. 8 1 2

. 5
June 2007 Cost Basis
1 1,522 2,447 76.28 N/A N/A N/A N/A
2 1,811 3,334 100.39 105.57 34

. 8 42.5 65.9
9 1,098 1,996 59.40 N/A N/A N/A N/A
10 1,985 3,610 103.80 109.58 46

. 3 68.2 74.4
11 1,113 2,024 58.91 N/A N/A N/A N/A
12 1,964 3,570 100.94 106.53 47

. 7 68.9 68.9
13 398 718 58.90 N/A N/A N/A N/A
14 709 1,497 82.72 85.89 70

. 2 83.8 35.5

### Updated Costs (J une 2011 Basis)



# 50 Exhibit 5

-2 COE by cost component

52.54 72.31

37.70 73.91

38.20 73.12

12.57 27.46 13.53 17.93

9.32 15.79

9.48 15.66

3.59 6.85 9.34 12.09

7.98 13.99

7.74 13.21

1.76 3.42 25.75 30.75

27.27 38.36

25.54 35.29

41.67 48.84 8.40 10.81 9.99

3.85 101.16 141.47

82.27 152.85

80.95 147.27

59.59 90.43

0 20 40 60 80 100 120 140 160



## GEE GEE w/CO2 Capture Subcritical PC Subcritical PC w/CO2 Capture Supercritical PC Supercritical PC w/CO2 Capture NGCC NGCC w/CO2 CaptureCOE, $/MWh (2011$) 

## CO2 T&S Costs
Fuel Costs
Variable Costs
Fixed Costs Capital Costs

### Updated Costs (J une 2011 Basis)



# 51 Exhibit 5

-3 First year CO 2 

## capture and avoided costs

48 65 66 80

59 96 96 96

85 105

96

12

0 20 40 60 80 100 120



## GEE w/CO2 Capture Subcritical PC w/CO2 Capture Supercritical PC w/CO2 Capture NGCC w/CO2 CaptureFirst Year CO2Captured/Avoided Cost, $/tonne (2011$) 

## Captured Cost Avoided Cost (Analogous Technology w/o Capture Reference) Avoided Cost (SC PC w/o Capture Reference)