### 10/22/2010 B&V E-2 and E-4 1 

## San Juan Generation Station BART Project Review and Update of 2007 BART Cost Estimates

1.0 Introduction The purpose of this document is to update the cost estimates for application of SCR at the San Juan Generating Station that were performed by B&V in May of 2007 in support of PNM’s BART application. The following items were assessed in this update:

• Impact of escalation on the prices incl uded in the original BART estimate.

• Impact of auxiliary power limitations at San Juan Generation Station.

• Impact of changes to the draft syst em resulting from the addition of the consent decree air quality control equipment.

• Impact of other general changes to the price.

It should be noted that the potential impact of lead and asbestos abatement on the price of SCR upgrades at San Juan was not assessed by B&V. These costs are site specific and can not be determined until the project is under construction. This document presents a discussion of each impact. The last section of this document presents the revised cost estimates that incorporate all impacts to the costs.

2.0 Price Escalation The estimates developed by B&V for the BART project were completed in May 2007. PNM requested B&V to perform an es calation analysis to update the BART estimates from May 2007 to current day dolla rs (Oct 2010). First, B&V utilized the corporate escalation tool for this analysis. The tool wa s jointly developed by Black & Veatch and an outside consulting firm that specializes in financial analysis and forecasting. For the purposes of this analys is the costs were grouped into three major categories:

• Materials (steel, pipe, cable, etc.)

• Equipment (pumps, tanks, switchgear, etc)

• Labor

### 10/22/2010 B&V E-2 and E-4 2 The resulting price escalation between May 2007 and October 2010 is shown in
Table 1. It should be noted that the esca lation shown is cumulative over the period. There were portions of this period where escalation was negative. However, there were also periods where escalati on was extremely high.

Table 1 Escalation Calculation Using B&V’s Corporate Escalation Tool May 2007 to October 2010 Cost Item Cumulative Escalation Rate Materials 10.0 percent increase Equipment 10.0 percent increase Labor 9.7 percent increase Average 10.0 percent increase

B&V also compared the values from th e corporate escalation tool to values
available from the United States Bureau of Labor Statistics, “Producer Price Index” and the “Employer Cost for Employee Compensa tion Index”. To do this comparison, B&V selected several representative cost categor ies and checked the inde x for those categories between May 2007 and September 2010 (latest data available). Table 2 is a summary of that investigation. The screen shots from the Bureau of Labor Statistics website that form the basis for Table 2 have been included for reference in Appendix A of this document.
The data in Table 1 and Table 2 are rela tively comparable. However, since the
data from the U.S. Bureau of Labor Statis tics can be independen tly verified, B&V has
utilized the values in Table 2 to escalate the BART estimates for San Juan Generating Station. The quantitative impacts to the costs will be presented in Section 5.0.

### 10/22/2010 B&V E-2 and E-4 3 Table 2 Escalation Calculation Using Data from U.S. Bureau of Labor Statistics
Index Value
Cost item May 2007 Sept 2007 Change (Escalation)
Materials
Plate Steel 119.2 137.5 15.4
Cable 160.8 166.1 3.3 Steel Pipe 170.1 195.7 15.0 Average 11.2 Equipment Pumps 117.9 129.7 10.0 Switchgear 179.1 195.2 9.0
Tanks 132.6 140.8 6.2 Average 8.4
Construction Labor (see note) $29.48/hr $31.43/hr 6.6
Note: Values for construction labor are in $/hour. Th e Bureau of Labor Sta tistics only has data available by quarter (1 st 

### quarter, 2 nd 

### quarter, etc.) and onl y has data through 2 nd 

### quarter of 2010 (not 3 rd 

### quarter 2010).

3.0 Auxiliary Power The original BART estimate included limited costs for upgrades to the auxiliary power systems that will be needed to ad dress the increased loads resulting from the addition of SCR and associated equipment. The SCR results in additional parasitic load at the site due to the additional fan power needed to overcome the pressure drop associated with the SCR and to provide addi tional power for ancillary equipment needed to operate the SCR. In th e initial 2007 estimate, PNM exp ected the existing auxiliary power to be sufficient. However, now that the consent decree AQC equipment has been

### 10/22/2010 B&V E-2 and E-4 4 installed, B&V has determined that the current auxiliary power system is not sufficient to power the additional loads that would result from adding SCR and associated equipment. B&V anticipates the following minimum load changes (no balanced draft conversion) as a result of the SCR’s:

• Unit 1 - ID fan increase of 4,400 hp

• Unit 2 - ID fan increase of 4,400 hp (same as Unit 1)

• Unit 3 - ID fan increase of 13,000 hp

• Unit 4 - ID fan increase of 13,000 hp (same as Unit 3)

• Other aux loads are as 140 kW (each) for Units 1 and 2 and 190 kW (each
for Units 3 and 4. From these minimum auxiliary power requirements, the following assumptions were made about the station. These assump tions are based on the information available
at this time.

• The existing start- up buses are limited.

• The startup issues are transformer limitations that require the additional power to be fed from the 345 kV switchyard.

• When motors are started, 85 percent bus undervoltage is acceptable and 80 percent motor undervoltage is acceptable.

• Two 3-breaker connection bays can be added to the 345 kV yard.

• The Units 1 and 2 ID fans will be 6,000 hp, three per unit, at 6.9 kV.

• The Units 3 and 4 ID fans will be 9,000 hp, three per unit, at 6.9 kV.

• Two additional bays (to feed the four new transformers) can be added to the 345 kV switchyard.

• Four new transformers will be required because of the new fan sizes. The transformers would be sized to power and start across the line fans for both sister units. In other words, Un its 1 and 2 would be coupled together
and Units 3 and 4 would be coupled together.

• There is adequate space near the new ID Fans is available to install new switchgear and transformers. With these assumptions, the following add itional equipment would be needed to power the SCR new equipment. The quanti ties listed are for the entire plant.

### 10/22/2010 B&V E-2 and E-4 5 • Two 345kV bays (includes 6 – 345 kV 3-phase breakers, 16 – 345 kV 3- phase motorized disconnect switches)

• Two 40 MVA 345 kV to 6.9 kV transf ormers (for Units 1 and 2)

• Two 60 MVA 345 kV to 12.47 kV transformers (for Units 3 and 4)

• One 6.9 kV Switchgear lineup Main-Tie -Main with 8 f eeder breakers,
3000 A bus for Units 1 and 2.

• One 12.49kV Switchgear lineup Main-Tie-Main with 8 feeder breakers,
3000 A bus for Units 3 and 4.

• Four 480 V single ended secondary un it substations (SUS), with motor control center (MCC) sections.

Figure 1 is a conceptual one-line diagram showing this configuration. The cost for this additional equipment is summarized in Table 3. These costs are conceptual,
based on in-house data. B&V did not obtain out side quotations specifically for this project to develop thes e costs. These costs are included in the overall u pdate of the SCR costs that are presented in Section 5.0.

Table 3 Presentation of Costs for Auxiliary Electrical Equipment Requirements for SCR Systems at San Juan Station Equipment Cost Item Estimate Amount 345 kV Bays $3,500,000 Transformers (for Units 1 and 2) $2,000,000 Transformers (for Units 3 and 4) $3,000,000 6.9 kV Switchgear Line Up (Units 1 and 2) $7,000,000 12.49 kV Switchgear Line Up (Units 3 and 4) $10,000,000 Four Secondary Unit Substations with Motor Control Centers $4,000,000 Total $29,500,000 Amount Attributable to Units 1 and 2 $6,400,000 (each) Amount Attributable to Units 3 and 4 $8,350,000 (each)

### 10/22/2010 B&V E-2 and E-4 6 Figure 1 Conceptual One-Line Diagram for New Auxiliary Electrical Equipmen t Associated with SCR Systems

4.0 Assessment of Draft Systems Implosion studies were performed for Un its 1-4 at SJGS for the implementation of the modifications required by the c onsent decree of 2005, which included the installation of new pollution control equipment and new in duced draft (ID) booster fans (although the furnace continued operation in pressurized mode). These studies modeled various transient conditions that could poten tially occur during unit operation (including upset conditions) and reviewed the corresponding pressures across the furnace and flue gas stream. The studies did not consider the effect of operating the booster fans with a loss of airside gas path that c ould occur with air side damper failure. This analysis was not required at the time but would be required to be in compliance with the current code.
This is discussed in more detail below. B&V has reviewed the implosion studies a nd their impact on the original BART
estimate for the balance draft conversion. The design basis from each implosion study

### 10/22/2010 B&V E-2 and E-4 7 was also validated against current plant ope rating data. B&V used this design basis information as the basis for updated recommen dations concerning the draft system. The figures in Appendix B show the current draft configurat ion as well as the draft configuration after a ddition of SCR. As a result of the implosi on studies, PNM made some physical modifications to
the boilers and some modifications to the co ntrols during the installation of the new control equipment required by the consent d ecree. These modifications brought Units 1-4 into compliance with the National Fire Pr otection Association (N FPA) Code 85 for the 2004 revision of the code. The following is a summary of the modifications that were made to the draft systems as part of the consent decree work:

• The open stack system upstream of the FGD system was permanently closed in conjunction with the fabric filter addition.

• The boiler penthouse floor (furnace roof ) was stiffened with the addition
of beams.

• Buckstay clips (connections to furnace walls) were added and cover plates were placed over some of the buckstay webs.

• The inlet ductwork penetration to the ESP was stiffened using internal bracing.

• Based on the stiffening modifications made, the control system was programmed to “trip” (shut the unit down) if the pressu re in the units exceeded a range of -2 / +18 inches wg.

The following modifications were not made to the draft system:

• Buckstays were not installed in the corners of the boiler.

• Trusses were not installed in the windbox.

At the time of the consent decree wor k, the NFPA requirements (2004 revision)
were unclear on how to handle the addition of ID booster fans on units that were still to be operated in a pressurized furnace mode. In 2007 the requirements were clarified to define that any unit with a fan between the boiler and stack must meet the same requirements as a “balanced draf t” unit and be stiffened accord ingly. This requires that

### 10/22/2010 B&V E-2 and E-4 8 the furnace either be designed for +/- 35 inches or the ratings of the ID/booster fans corrected to ambient temperatur e (whichever is less). Th e key provisions of the NFPA 85 code are quoted below:

Article 1.3.1 : The code shall apply to new installations and to major
alterations or extensions that are contra cted for subsequent to the effective date of this code.

Article 1.4.1 Unless otherwise specified, the pr ovisions in this code shall not apply to facilities equipm ent, structures, or insta llations that existed or were approved for construction or insta llation prior to the effective date of
the code.

Article 4.6.1 : The furnace shall be capabl e of withstanding transient design pressures and normal operati ng pressures without permanent deformation due to yield or buckli ng of any support member. Transient pressures to be considered shall in clude but shall not necessarily be limited to misoperation of fans or dampers and a master fuel trip while operating at maximum design load.

Article 6.5.1.3: Balanced Draft Units. All boilers with a fan located in the flue gas path downstream of the boile r enclosure shall be designed in
accordance with either 6.5.1.3.1 or 6.5.1.3.2.
6.5.1.3.1 The furnace and flue gas removal system shall be designed so that the maximum head capability of the induced draft fan system with
ambient air does not exceed the continuous design pressure of furnace, ducts, and associated equipment.
6.5.1.3.2 Where a furnace pressure control system in accordance with 6.5.2 is provided, the furnace shall be designed for the transient design pressures in 6.5.1.3.2.1 and 6.5.1.3.2.2.

### 10/22/2010 B&V E-2 and E-4 9 6.5.1.3.2.1 Positive Transient Design Pressure. The positive transient design pressure shall be at least, but shall not be required to exceed, +8.7 kPa (+35 in. of water). 6.5.1.3.2.2 Negative Transient Design Pressure. The negative transient design pressure shall be at least as negative as, but shall not be required to be more negative than,

− 8.7 kPa (

− 35 in. of water).

Accordingly, NFPA 85 now requires SJGS to increase the pressure ratings of the boilers to +/- 35 inches wg if the capacity of the ID /booster fans is increased. To comply with NFPA 85, and increase the pressure rati ng of the units to +/ - 35 inches wg, SJGS will have to install buckstay corner conn ections, buckstay over-turning posts, and will likely have to install air heater stiffening as well. While some buckstay clips were added for the consent decree work, the spacing of those clips is unknown. Therefore, it is assumed that some additional clips would be needed to increase the pressure rating from
the current level of -2 / +18 in ches wg to +/- 35 inches wg. The fabric filters will also require add itional stiffening to increase the continuous pressure rating to that of the new ID fan te st block suction pressure. B&V expects that the hot ESP casing will require stiffening as well. B&V continues to recommend a balanced draft conversion be pe rformed on all four units at SJ GS if SCR installation is required. Due to the 2007 NFPA 85 revisi ons, stiffening of the boiler and other components will be required regardless of whether a balanced draft conversion is performed (the majority of the costs associ ated with the balanced draft conversion are related to boiler stiffening). Table 4 and Table 5 provide the updated cost estimates for the balanced draft conversion. Costs for stiffening the fabric f ilters have been added as it was determined
that the fabric filters will also need to be stiffened if the capacity of the booster fans is increased to allow for SCR operation. Tables 4 and 5 also show a column for deleting the balance draft conversion po rtion of the work. In this scenario, th e boiler would remain a positive pressure boiler, but the stiffening work, required by NFPA 85, would still need to be completed. As a result , the long outage associ ated with the boiler stiffening would also be required regardless of whether the units remain pressurized or

### 10/22/2010 B&V E-2 and E-4 10 are converted to balanced draf t. If a balanced draft conve rsion is not performed, new, low-speed motors for the FD fans would not be required and the ID fans would be smaller, resulting in a total cost savings of $1.5 million.

Table 4 Updated Costs for Balanced Draft Conversion Units 1 and 2 (2007 Dollars) Units 1 & 2 BART Study Updated

Balanced Draft Conversion Engineering & Material Construction Labor Costs Engineering & Material Construction Labor Costs Pressurized Furnace Differential Boiler Stiffening $1,335,000 $1,418,000 $1,335,000 $1,418,000 (Same) Scaffolding -- $195,000 -- $195,000 (Same) Insulation & Lagging $139,000 $1,197,000 $139,000 $1,197,000 (Same) Ductwork & Casing Repairs (Allowance) $182,000 $1,008,000 $182,000 $1,008,000 (Same) Air Heater Stiffening $106,000 $195,000 $106,000 $195,000 (Same) Electrostatic Precipitator Stiffening (Excludes Casing Repairs) $341,000 $1,114,000 $341,000 $1,114,000 (Same) Insulation & Lagging (Allowance) $84,000 $418,000 $84,000 $418,000 (Same) Electrical/Control Modifications $159,000 $334,000 $159,000 $334,000 (Same) New Transformer (Note 2) $1,000,000 $0 Fan Modifications

FD Fans (new motors only) $490,000 $86,000 $490,000 $86,000 ($576,000) ID Fans $2,400,000 $840,000 $2,400,000 $840,000 ($500,000) Fabric Filter (assumed same

as ESP) Stiffening (Excludes Casing Repairs) $341,000 $1,114,000 (Same) Insulation & Lagging (Allowance) $84,000 $418,000 (Same) Miscellaneous Mech Commodities & Instrumentation $325,000 -- $325,000 -- (Same) Subtotal $6,561,000 $6,805,000 $5,986 ,000 $8,337,000 ($1,076,000) Notes: 1. Excludes Contingency and Indirects 2. Auxiliary electric costs are being account ed for in a separate analysis. Refe r to Section 3.0 of this report. Therefore, they are being deleted from the balanced draft conversion estimate.

### 10/22/2010 B&V E-2 and E-4 11 Table 5 Updated Costs for Balanced Draft Conversion Units 3 and 4 (2007 Dollars) Units 3&4 BART Study Updated

Balanced Draft Conversion Engineering & Material Construction Labor Costs Engineering & Material Construction Labor Costs Pressurized Furnace Differential Boiler Stiffening $1,537,000 $1,908,000 $1,537,000 $1,908,000 (Same) Scaffolding - - $262,000 - - $263,000 (Same) Insulation & Lagging $188,000 $1,438,000 $188,000 $1,438,000 (Same) Ductwork & Casing Repairs (Allowance) $182,000 $1,009,000 $182,000 $1,009,000 (Same) Air Heater Stiffening $125,000 $263,000 $125,000 $263,000 (Same) Electrostatic Precipitator Stiffening (Excludes Casing Repairs) $416,000 $1,500,000 $416,000 $1,500,000 (Same) Insulation & Lagging (Allowance) $113,000 $563,000 $113,000 $563,000 (Same) Electrical/Control Modifications $214,000 $450,000 $214,000 $450,000 (Same) New Transformer (Note 2) $1,000,000 $0 Fan Modifications

FD Fans (new motors only) $660,000 $116,000 $660,000 $116,000 ($776,000) ID Fans $3,600,000 $1,260,000 $3,600,000 $1,260,000 ($800,000) Fabric Filter (assumed

same as ESP) Stiffening (Excludes Casing Repairs) $416,000 $1,500,000 (Same) Insulation & Lagging (Allowance) $113,000 $563,000 (Same) Miscellaneous Mech Commodities & Instrumentation $325,000 - - $325,000 - - (Same)

Subtotal $8,357,000 $8,765,000 $7,886 ,000 $10,828,000 ($1,576,000) Notes: 1. Excludes Contingency and Indirects. 2. Auxiliary electric costs are being account ed for in a separate analysis. Refe r to Section 3.0 of this report. Therefore, they are being deleted from the balanced draft conversion estimate.

### 10/22/2010 B&V E-2 and E-4 12 The values presented in Tabl es 4 and 5 are in 2007 dollars and will be included in the revised estimates presented in Section 5.0.

5.0 Updated Cost Estimates This section of the document will present the updated capital cost estimates for the SCR systems on San Juan Generating Statio n. A summary of the updates is shown in Table 6. The details of the updated costs are presented in Tabl es 7 through 10. The following updates were made to the original BART cost estimates:

• Escalation to 2010 dollars, as described in Section 2.0 of this document.

• Auxiliary power system costs, as described in Section 3.0 of this
document.

• Balanced draft conversion updates, as described in Se ction 4.0 of this
document.

• Correction to the error in expansio n joint costs, noted to the EPA on October 8, 2010.

• Correction to air heater costs fo r Units 3 and 4. The costs for modifications to the secondary ai r heaters were inadvertently double
counted.

• Reduction in ductwork steel costs to move to the use of ASTM A572 duct
material instead of ASTM A588 Grad e B material. This issue is discussed in greater detail in the foll ow up responses to the conference call held with the EPA on October 13, 2010.

Line items in Tables 7 through 10 that have changes as a direct result of one of
the items listed above are shown in red in th e tables. Since the estimate is a factored estimate, a change to one line item will change other line items that are factors. For example, as the total purchased equipment cost (PEC) changes, the cost for “handling and erection” will also change because it is a multiplication factor of the purchased equipment cost.

### 10/22/2010 B&V E-2 and E-4 13 Table 6 Summary of SCR Capital Cost Updates for San Juan Station Unit No. 2007 BART Estimate 2010 Updated Cost Estimate Change 1 $156,805,000 $194,101,000 +23.8 % 2 $169,251,000 $209,652,000 +23.9 % 3 $215,568,000 $261,954,000 +21.5 % 4 $199,558,000 $242,377,000 +21.5 % Total $741,182,000 $908,084,000 +22.5 %



### As can be seen in Table 6, the costs for S CR are higher than the original estimate. The two main causes of these changes are the escalation to 2010 dollars and the auxiliary power system upgrades that are required
The cost increases shown above incl ude the recommended balanced draft conversion costs. For compar ison purposes, B&V did examine the impact to the costs if only the “boiler stiffening” work discussed in Section 4.0 is done (boiler, duct, ESP, air heater, and fabric filter stiffening in accord ance with NFPA 85) but not the additional fan
work that would be associated with the balance draft conversi on. The result of this analysis showed that the updated costs will be only slightly different when the costs solely attributable to the balanced draft c onversion are excluded -- an increase of 21.3 percent (for the whol e station) compared with 22.5 perc ent, for a total difference of $9,192,000 (about 1 percent of the project cost). As discussed in Section 4.0, the difference is slight because all of the boiler stiffening work is requ ired (with or without balance draft conversion). The only differe nce in the total pri ce for including the
balanced draft conversion is the difference in fan costs.10/22/2010B&V E-2 and E-4 14Table 7 - PNM SJGS BART Analysis - Updated Cost AnalysisTechnology:Selective Catalytic Reduction - SJGS Unit 1Date:10/21/2010Cost Item $ Remarks/Cost BasisOriginal 2007 BART Cost EstimateEscalation EscalationDirect CostsCurrent ValueComments on Updatesto Oct 2010PercentagePurchased equipment costsAnhydrous Ammonia Injection System $437,000 B&V cost estimate $437,000 $473,708 8.4%Anhydrous Ammonia Vaporization System $436,000B&V cost estimate$436,000 $472,624 8.4%Reactor Box, Breeching and Ductwork $4,451,000 B&V cost estimate$4,005,900 Adjustement for ASTM A572$4,454,561 11.2%Ductwork Expansion Joints $294,000 B&V cost estimate$147,000 Correction$159,348 8.4%Catalyst $2,557,000 B&V cost estimate $2,557,000 $2,557,000 0.0%Sonic Horns $188,000 B&V cost estimate$188,000 $203,792 8.4%Elevator $1,236,000 B&V cost estimate $1,236,000 $1,339,824 8.4%Structural Steel $4,881,000 B&V costestimate $4,881,000 $5,427,672 11.2%SCR Bypass $10,000,000 B&V cost estimate $10,000,000 $10,840,000 8.4%NOx Monitoring System$440,000B&V cost estimate$440,000 $476,960 8.4%Electrical System Upgrade $378,000 B&V cost estimate$378,000 $409,752 8.4%Auxiliary Electric System Requirements $0 Not in estimate $6,400,000 Added, Refer to Sect. 3.0$6,400,000 0.0%Instrumentation and Control System $279,000 B&V cost estimate $279,000 $302,436 8.4%Subtotal capital cost (CC) $25,577,000 $31,384,900 $33,517,677Gross Receipt Tax $1,583,000 (CC) X 6.2% $1,942,000 $2,074,000Freight $1,279,000 (CC) X 5.0% $1,569,000 $1,676,000Total purchased equipment cost (PEC) $28,439,000 $34,896,000 $37,268,000Direct installation costsFoundation & supports $8,532,000 (PEC) X 30.0% $10,468,800 $11,117,866 6.2%Handling & erection $8,532,000 (PEC) X 30.0% $10,468,800 $11,117,866 6.2%Electrical $4,266,000 (PEC) X 15.0% $5,234,400 $5,558,933 6.2%Piping $711,000 (PEC) X 2.5% $872,400 $926,489 6.2%Insulation $2,844,000 (PEC) X 10.0% $3,489,600 $3,705,955 6.2%Painting $284,000 (PEC) X 1.0% $348,960 $370,596 6.2%Demolition $2,844,000 (PEC) X 10.0% $3,489,600 $3,705,955 6.2%Relocation $1,422,000 (PEC) X 5.0% $1,744,800 $1,852,978 6.2%Total direct installation costs (DIC) $29,435,000 $36,117,360 $38,356,636Air preheater modifications $1,071,000B&V cost estimate $1,071,000 $1,160,964 8.4%Balanced draft conversion$13,366,000B&V cost estimate$14,323,000 Refer to Section 4.0$15,526,132 8.4%Site preparation $2,000,000 Engineering estimate $2,000,000 $2,000,000 0.0%Buildings & enclosures $500,000 Engineering estimate $500,000 $500,000 0.0%Total direct costs (DC) = (PEC) + (DIC) $74,811,000 $88,907,000 $94,812,000Indirect CostsEngineering $5,237,000 (DC) X 7.0% $6,223,490 $6,636,840Owner's cost $3,741,000 (DC) X 5.0% $4,445,350 $4,740,600Construction management $7,481,000 (DC) X 10.0% $8,890,700 $9,481,200Construction indirect $18,344,000 B&V labor marketreview $22,507,920 $23,903,411 6.2%Start-up and spare parts $2,244,000 (DC) X 3.0% $2,667,210 $2,844,360Performance test $200,000 Engineering estimate $200,000 $200,000Contingencies $14,962,000 (DC) X 20.0% $17,781,400 $18,962,400Total indirect costs (IC) $52,209,000 $62,716,000 $66,769,000Interest During Construction (IDC) $14,118,000 [(DC)+(IC)] X 7.41% $16,853,000 $16,853,000Loss Generation during Outage (GEN) $15,667,000 $15,667,000 $15,667,000Total Capital Investment (TCI) = (DC) + (IC) + (IDC) + (GEN)$156,805,000 $184,143,000 $194,101,00010/22/2010B&V E-2 and E-4 15Table 8 - PNM SJGS BART Analysis - Updated Cost AnalysisTechnology:Selective Catalytic Reduction - SJGS Unit 2Date:10/21/2010Cost Item $ Remarks/Cost BasisOriginal 2007 BART Cost EstimateCAPITAL COSTEscalation EscalationDirect CostsCurrent ValueComments on Updatesto Oct 2010PercentagePurchased equipment costsAnhydrous Ammonia Injection System $429,000 B&V cost estimate $429,000 $465,036 8.4%Anhydrous Ammonia Vaporization System $429,000 B&V cost estimate $429,000 $465,036 8.4%Reactor Box, Breeching and Ductwork $4,444,000 B&V cost estimate$3,999,600 Adjustement for ASTM A572$4,447,555 11.2%Ductwork Expansion Joints $294,000 B&V cost estimate$147,000 Correction$159,348 8.4%Catalyst $2,553,000 B&V cost estimate $2,553,000 $2,553,000 0.0%Sonic Horns $188,000 B&V cost estimate $188,000 $203,792 8.4%Elevator $1,236,000 B&V cost estimate $1,236,000 $1,339,824 8.4%Structural Steel $5,998,000 B&V cost estimate $5,998,000 $6,669,776 11.2%SCR Bypass $10,000,000 B&V cost estimate $10,000,000 $10,840,000 8.4%NOx Monitoring System $440,000 B&V cost estimate $440,000 $476,960 8.4%Electrical System Upgrade $372,000 B&V cost estimate $372,000 $403,248 8.4%Auxiliary Electric System Requirements $0 Not in estimate $6,400,000 Added, Refer to Sect. 3.0$6,400,000 0.0%Instrumentation and Control System $278,000 B&V cost estimate $278,000 $301,352 8.4%Subtotal capital cost (CC) $26,661,000 $32,469,600 $34,724,927Gross Receipt Tax $1,650,000 (CC) X 6.2% $2,009,000 $2,149,000Freight $1,333,000 (CC) X 5.0% $1,623,000 $1,736,000Total purchased equipment cost (PEC) $29,644,000 $36,102,000 $38,610,000Direct installation costsFoundation & supports $8,893,000 (PEC) X 30.0% $10,830,600 $11,502,097 6.2%Handling & erection $11,858,000 (PEC) X 40.0% $14,440,800 $15,336,130 6.2%Electrical $4,447,000 (PEC) X 15.0% $5,415,300 $5,751,049 6.2%Piping $741,000 (PEC) X 2.5% $902,550 $958,508 6.2%Insulation $2,964,000 (PEC) X 10.0% $3,610,200 $3,834,032 6.2%Painting $296,000 (PEC) X 1.0% $361,020 $383,403 6.2%Demolition $2,964,000 (PEC)X 10.0% $3,610,200 $3,834,032 6.2%Relocation $1,482,000 (PEC) X 5.0% $1,805,100 $1,917,016 6.2%Total direct installation costs (DIC) $33,645,000 $40,975,770 $43,516,268Air preheater modifications $1,071,000 B&V cost estimate $1,071,000 $1,160,964 8.4%Balanced draft conversion $13,366,000 B&V cost estimate$14,323,000 Refer to Section 4.0$15,526,132 8.4%Site preparation $2,000,000 Engineering estimate $2,000,000 $2,000,000 0.0%Buildings & enclosures $500,000 Engineering estimate $500,000 $500,000 0.0%Total direct costs (DC) = (PEC) + (DIC) $80,226,000 $94,972,000 $101,313,000Indirect CostsEngineering $5,616,000 (DC) X 7.0% $6,648,040 $7,091,910Owner's cost $4,011,000 (DC) X 5.0% $4,748,600 $5,065,650Construction management $8,023,000 (DC) X 10.0% $9,497,200 $10,131,300Construction indirect $22,085,000 B&V labor market review $26,895,990 $28,563,541 6.2%Start-up and spare parts $2,407,000 (DC) X 3.0% $2,849,160 $3,039,390Performance test $200,000 Engineering estimate $200,000 $200,000Contingencies $16,045,000 (DC) X 20.0% $18,994,400 $20,262,600Total indirect costs (IC) $58,387,000 $69,833,000 $74,354,000Interest During Construction (IDC) $15,407,000 [(DC)+(IC)] X 7.41% $18,318,000 $18,318,000Loss Generation during Outage (GEN) $15,231,000 $15,667,000 $15,667,000Total Capital Investment (TCI)= (DC) + (IC) + (IDC) + (GEN)$169,251,000 $198,790,000 $209,652,00010/22/2010B&V E-2 and E-4 16Table 9 - PNM SJGS BART Analysis - Updated Cost AnalysisTechnology:Selective Catalytic Reduction - SJGS Unit 3Date:10/21/2010Cost Item $ Remarks/Cost BasisOriginal 2007 BART Cost EstimateCAPITAL COSTEscalation EscalationDirect CostsCurrent ValueComments on Updatesto Oct 2010PercentagePurchased equipment costsAnhydrous Ammonia Injection System $559,000 B&V cost estimate $559,000 $605,956 8.4%Anhydrous Ammonia Vaporization System $559,000 B&V cost estimate $559,000 $605,956 8.4%Reactor Box, Breeching and Ductwork $5,613,000 B&V cost estimate$5,051,700 Adjustement for ASTM A572$5,617,490 11.2%Ductwork Expansion Joints $371,000 B&V cost estimate$185,500 Correction$201,082 8.4%Catalyst $3,225,000 B&V cost estimate $3,225,000 $3,225,000 0.0%Sonic Horns $188,000 B&V cost estimate $188,000 $203,792 8.4%Elevator $1,236,000 B&V cost estimate $1,236,000 $1,339,824 8.4%SCR Bypass $10,000,000 B&V cost estimate $10,000,000 $11,120,000 11.2%Structural Steel $7,816,000 B&V cost estimate $7,816,000 $8,472,544 8.4%NOx Monitoring System $440,000 B&V cost estimate $440,000 $476,960 8.4%Electrical System Upgrade $484,000 B&V cost estimate $484,000 $524,656 8.4%Auxiliary Electric System Requirements $0 Not in estimate $8,350,000 Added, Refer to Sect. 3.0$8,350,000 0.0%Instrumentation and Control System $291,000 B&V cost estimate $291,000 $315,444 8.4%Subtotal capital cost (CC) $30,782,000 $38,385,200 $41,058,704Gross Receipt Tax $1,905,000 (CC) X 6.2% $2,375,000 $2,541,000Freight $1,539,000 (CC) X 5.0% $1,919,000 $2,053,000Total purchased equipment cost (PEC) $34,226,000 $42,679,000 $45,653,000Direct installation costsFoundation & supports $10,268,000 (PEC) X 30.0% $12,803,700 $13,597,529 6.2%Handling & erection $13,690,000 (PEC) X 40.0% $17,071,600 $18,130,039 6.2%Electrical $5,134,000 (PEC) X 15.0% $6,401,850 $6,798,765 6.2%Piping $856,000 (PEC) X 2.5% $1,066,975 $1,133,127 6.2%Insulation $3,423,000 (PEC) X 10.0% $4,267,900 $4,532,510 6.2%Painting $342,000 (PEC) X 1.0% $426,790 $453,251 6.2%Demolition $3,423,000 (PEC) X 10.0% $4,267,900 $4,532,510 6.2%Relocation $1,711,000 (PEC) X 5.0% $2,133,950 $2,266,255 6.2%Total direct installation costs (DIC) $38,847,000 $48,440,665 $51,443,986Air preheater modifications $8,685,000 B&V cost estimate$5,090,000 Correction$5,517,560 8.4%Balanced draft conversion $17,122,000 B&V cost estimate$18,714,000 Refer to Section 4.0$20,285,976 8.4%Site preparation $2,000,000 Engineering estimate $2,000,000 $2,000,000 0.0%Buildings & enclosures $500,000 Engineering estimate $500,000 $500,000 0.0%Total direct costs (DC) = (PEC) + (DIC) $101,380,000 $117,424,000 $125,401,000Indirect CostsEngineering $7,097,000 (DC) X 7.0% $8,219,680 $8,778,070Owner's cost $5,069,000 (DC) X 5.0% $5,871,200 $6,270,050Construction management $10,138,000 (DC) X 10.0% $11,742,400 $12,540,100Construction indirect $25,498,000 B&V labor market review $31,795,855 $33,767,198 6.2%Start-up and spare parts $3,041,000 (DC) X 3.0% $3,522,720 $3,762,030Performance test $200,000 Engineering estimate $200,000 $200,000Contingencies $20,276,000 (DC) X 20.0% $23,484,800 $25,080,200Total indirect costs (IC) $71,319,000 $84,837,000 $90,398,000Interest During Construction (IDC) $19,195,000 [(DC)+(IC)] X 7.41% $22,481,000 $22,481,000Loss Generation during Outage (GEN) $23,674,000 $23,674,000 $23,674,000Total Capital Investment (TCI) = (DC) + (IC) + (IDC) + (GEN)$215,568,000 $248,416,000 $261,954,00010/22/2010B&V E-2 and E-4 17Table 10 - PNM SJGS BART Analysis - Updated Cost AnalysisTechnology:Selective Catalytic Reduction - SJGS Unit 4Date:10/21/2010Cost Item $ Remarks/Cost BasisOriginal 2007 BART Cost EstimateCAPITAL COSTEscalation EscalationDirect CostsCurrent ValueComments on Updatesto Oct 2010PercentagePurchased equipment costsAnhydrous Ammonia Injection System $559,000 B&V cost estimate $559,000 $605,956 8.4%Anhydrous Ammonia Vaporization System $559,000 B&V cost estimate $559,000 $605,956 8.4%Reactor Box, Breeching and Ductwork $5,648,000 B&V cost estimate$5,083,200 Adjustement for ASTM A572$5,652,518 11.2%Ductwork Expansion Joints $373,000 B&V cost estimate$186,500 Correction$202,166 8.4%Catalyst $3,245,000 B&V cost estimate $3,245,000 $3,245,000 0.0%Sonic Horns $188,000 B&V cost estimate $188,000 $203,792 8.4%Elevator $1,236,000 B&V cost estimate $1,236,000 $1,339,824 8.4%Structural Steel $6,252,000 B&V cost estimate $6,252,000 $6,952,224 11.2%SCR Bypass $10,000,000 B&V cost estimate $10,000,000 $10,840,000 8.4%NOx Monitoring System $440,000 B&V cost estimate $440,000 $476,960 8.4%Electrical System Upgrade $484,000 B&V cost estimate $484,000 $524,656 8.4%Auxiliary Electric System Requirements $0 Not in estimate $8,350,000 Added, Refer to Sect. 3.0$8,350,000 0.0%Instrumentation and Control System $291,000 B&V cost estimate $291,000 $315,444 8.4%Subtotal capital cost (CC) $29,275,000 $36,873,700 $39,314,496Gross Receipt Tax $1,811,000 (CC) X 6.2% $2,282,000 $2,433,000Freight $1,464,000 (CC) X 5.0% $1,844,000 $1,966,000Total purchased equipment cost (PEC) $32,550,000 $41,000,000 $43,713,000Direct installation costsFoundation & supports $9,765,000 (PEC) X 30.0% $12,300,000 $13,062,600 6.2%Handling & erection $9,765,000 (PEC) X 30.0% $12,300,000 $13,062,600 6.2%Electrical $4,883,000 (PEC) X 15.0% $6,150,000 $6,531,300 6.2%Piping $814,000 (PEC) X 2.5% $1,025,000 $1,088,550 6.2%Insulation $3,255,000 (PEC) X 10.0% $4,100,000 $4,354,200 6.2%Painting $326,000 (PEC) X 1.0% $410,000 $435,420 6.2%Demolition $3,255,000 (PEC) X 10.0% $4,100,000 $4,354,200 6.2%Relocation $1,628,000 (PEC) X 5.0% $2,050,000 $2,177,100 6.2%Total direct installation costs (DIC) $33,691,000 $42,435,000 $45,065,970Air preheater modifications $8,685,000 B&V cost estimate$5,090,000 Correction$5,517,560 8.4%Balanced draft conversion $17,122,000 B&V cost estimate$18,714,000 Refer to Section 4.0$20,285,976 8.4%Site preparation $2,000,000 Engineering estimate $2,000,000 $2,000,000 0.0%Buildings & enclosures $500,000 Engineering estimate $500,000 $500,000 0.0%Total direct costs (DC) = (PEC) + (DIC) $94,548,000 $109,739,000 $117,083,000Indirect CostsEngineering $6,618,000 (DC) X 7.0% $7,681,730 $8,195,810Owner's cost $4,727,000 (DC) X 5.0% $5,486,950 $5,854,150Construction management $9,455,000 (DC) X 10.0% $10,973,900 $11,708,300Construction indirect $20,996,000 B&V labor market review $26,445,000 $28,084,590 6.2%Start-up and spare parts $2,836,000 (DC) X 3.0% $3,292,170 $3,512,490Performance test $200,000 Engineering estimate $200,000 $200,000Contingencies $18,910,000 (DC) X 20.0% $21,947,800 $23,416,600Total indirect costs (IC) $63,742,000 $76,028,000 $80,972,000Interest During Construction (IDC) $17,594,000 [(DC)+(IC)] X 7.41% $20,648,000 $20,648,000Loss Generation during Outage (GEN) $23,674,000 $23,674,000 $23,674,000Total Capital Investment (TCI) = (DC) + (IC) + (IDC) + (GEN)$199,558,000 $230,089,000 $242,377,000

### 10/22/2010 B&V E-2 and E-4 Appendix A

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Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 2007 118.3 118.3 119.6 118.9 119.2 119.8 119.8 120.9 120.9 120.9 121.7 124.3 120.2 2008 130.1 136.7 137.3 139.0 143.3 146.6 148.4 152.4 151.3 151.7 151.2 151.0 144.9 2009 148.4 145.8 143.5 141.7 138.6 136.5 136.0 135.8 136.7 136.8 134.3 134.6 139.1 2010 134.7 135.0 135.1 136.2 136.9 136.7(P) 136.3(P) 136.2(P) 137.5(P) P : Preliminary. All indexes are subject to revision four months after original publication. **Series Id:** PCU332313332313 **Industry:** Plate work manufacturing **Product:** Plate work manufacturing **Base Date:** 200312

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Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 2007 153.5 147.6 148.9 154.6 160.8 162.6 166.8 170.3 167.0 169.8 168.5 164.9 161.3 2008 165.8 167.2 175.5 175.4 176.8 174.1 175.9 173.9 171.9 163.4 148.5 146.8 167.9 2009 143.2 142.1 141.2 148.6 153.8 154.6 156.5 159.7 161.2 162.3 164.7 169.8 154.8 2010 169.7 172.5 169.6 173.3 173.6 170.5(P) 169.2(P) 169.7(P) 166.1(P) P : Preliminary. All indexes are subject to revision four months after original publication. **Series Id:** PCU33592-33592- **Industry:** Communication & energy wire & cable mfg **Product:** Communication & energy wire & cable mfg **Base Date:** 200312

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Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 2007 169.4 167.2 168.6 169.8 170.1 169.1 168.8 168.1 167.0 167.1 165.3 166.7 168.1 2008 170.2 176.1 186.0 197.2 207.9 218.9 223.0 225.8 227.7 228.8 214.1 203.0 206.6 2009 182.8 177.4 172.9 161.6 158.1 152.2 153.2 157.3 164.1 166.1 164.8 166.2 164.7 2010 170.8 174.7 185.0 190.0 195.7 194.0(P) 196.6(P) 193.7(P) 195.7(P) P : Preliminary. All indexes are subject to revision four months after original publication. **Series Id:** PCU33121-33121- **Industry:** Iron/steel pipe & tube mfg from purch steel **Product:** Iron/steel pipe & tube mfg from purch steel **Base Date:** 200312

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Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 2007 115.2 116.3 116.7 117.6 117.9 118.0 118.1 118.4 118.6 119.1 119.3 119.5 117.9 2008 120.9 121.5 122.0 121.9 122.4 122.9 123.8 124.8 125.8 125.6 126.0 126.2 123.6 2009 127.0 127.0 127.0 127.2 127.2 127.4 127.7 127.6 127.9 127.8 127.8 127.9 127.5 2010 128.2 128.2 128.4 128.4 128.8 128.7(P) 129.0(P) 129.4(P) 129.7(P) P : Preliminary. All indexes are subject to revision four months after original publication. **Series Id:** PCU33391-33391- **Industry:** Pump and compressor manufacturing **Product:** Pump and compressor manufacturing **Base Date:** 200312

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Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 2007 175.2 177.1 178.4 179.1 179.1 179.2 179.6 177.7 181.7 181.3 182.1 182.5 179.4 2008 180.9 183.3 183.7 185.3 184.8 186.7 188.5 191.1 190.7 191.8 191.0 192.3 187.5 2009 193.9 190.4 193.2 194.7 190.6 191.7 191.7 193.8 193.6 194.2 194.6 194.5 193.1 2010 194.2 193.4 194.5 194.7 194.2 196.2(P) 194.6(P) 195.5(P) 195.2(P) P : Preliminary. All indexes are subject to revision four months after original publication. **Series Id:** PCU335313335313 **Industry:** Switchgear and switchboard apparatus mfg **Product:** Switchgear and switchboard apparatus mfg **Base Date:** 198506

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Data extracted on: October 20, 2010 (10:27:59 AM) Producer Price Index Industry Data

Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 2007 128.8 129.3 131.0 131.4 132.6 132.6 132.8 133.3 133.5 133.9 134.3 134.4 132.3 2008 134.6 136.9 138.1 140.3 142.6 144.4 145.5 147.3 147.1 147.6 147.0 146.8 143.2 2009 146.5 145.8 145.6 143.4 142.5 141.2 140.9 140.5 140.2 140.4 140.3 140.2 142.3 2010 139.2 139.1 139.1 140.1 140.5 141.1(P) 141.0(P) 141.0(P) 140.8(P) P : Preliminary. All indexes are subject to revision four months after original publication. **Series Id:** PCU33242-33242- **Industry:** Metal tank (heavy gauge) mfg **Product:** Metal tank (heavy gauge) mfg **Base Date:** 200312

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### Pa g e 1 of 2 Bureau of Labor Statistics Data

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Change Output Options: From: 2007 To: 2010

Data extracted on: October 20, 2010 (11:44:21 AM) 

### Employer Costs for Employee Compensation

Year Period Cost of compensation (Cost per hour worked) Percent of total compensation 2007 Qtr1 29.02 100.0 2007 Qtr2 29.48 100.0 2007 Qtr3 29.77 100.0 2007 Qtr4 29.88 100.0 2008 Qtr1 30.33 100.0 2008 Qtr2 30.60 100.0 2008 Qtr3 30.92 100.0 2008 Qtr4 31.21 100.0 2009 Qtr1 31.33 100.0 2009 Qtr2 31.53 100.0 2009 Qtr3 31.65 100.0 2009 Qtr4 30.99 100.0 2010 Qtr1 31.20 100.0 2010 Qtr2 31.43 100.0 V : See www.bls.gov/ncs/ect/mapnote.htm for details regarding the Farming, fishing, and forestry series. **Series Id:** CMU1010000405000D,CMU1010000405000P (V) **Compensation Component:** Total compensation **Employer/Employee Charac.:** Construction, extraction, farming, fishing, and forestry occupations **Sector:** All Civilian

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### Pa g e 1 of 2 Bureau of Labor Statistics Data

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### 10/22/2010 B&V E-2 and E-4 Appendix B

Draft System Pressure Curves10/22/2010B&V E-2 and E-410/22/2010B&V E-2 and E-4