At Xcel Energy, we remain committed to our environmental leadership strategy. We aggressively pursue innovative clean energy technologies, including emissions reductions, renewable resources, energy efficiency programs and new technologies.

**e m i s s i o n s** The installation of low nitrogen-oxide burners at our Harrington Generation Station coal plant resulted in a 50 percent reduction of NO
x emissions from two units with the new burner technology. Burner tune-ups at our Tolk coal plant reduced NO
x emissions 35 percent each in two units. Together, the upgrades result in 1,000 tons less NO
x a month. Burning low-sulfur coal from Wyoming, ongoing modifications and newly installed neural-networked “learning” software have combined to improve combustion efficiency and reduce emissions at our coal plants.

**E mission-control and efficiency projects** 
Harrington Unit 1 Optimization and burner tuning, reduce NO
x 950 tons per year Expansion joint replacement on preheaters in 2010, saving 40,250 tons CO 2 over life of project In late 2010, unit 1 boiler modification will result in significant NO
x reduction
T olk Unit 1 Pre-heater basket replacement, reduce CO 2 30,000 tons over life of project Neural-network installation, reduce NO
x 161 tons a year
T olk Units 1 and 2 Hydrogen generator installation, reduce CO 2 141,579 tons over life of project

W e ar e connecte d ... to a c l e a n ene r g y fu t u r e

... to o ur c u sto m e r s

... to the co mmu nities we se r v e

. 

# 2010 our clean energy future | Texas and New Mexico

clean energy f u t u r e

“For Xcel Energy, environmental leadership is more than just a promise. We have the results to prove our commitment – and every effort moves us closer to a clean energy future.”

– Dick Kelly,

Xcel Energy Chairman and CEO b u siness innovation E n e r g y E fficiency

advanced tec h nologiest ex as an d n ew m ex i co 2010 Our cl ean ene rgy fu t ur e

**1-800-895-4999 | xcelenergy.com** © 2010 Xcel Energy Inc. | Xcel Energy is a registered trademark of Xcel Energy Inc. Southwestern Public Service Company, an Xcel Energy Company | 10-05-418 | 05/2010 **technology** Energy from renewable sources is a growing part of our energy mix because it provides clean, cost-effective energy to ourcustomers, and it supports our emissionsreduction goals.
Texas and New M exico had about 846 megawatts of wind connected to its system at the end of 2009, with 443 megawatts under long-term contract. Our pursuit of long-term agreements with renewable energy providers – wind, biomass, solar and others – and our investment in transmission, distribution and generation efficiency projects – compliments our vision for addressing potentially rising fuel costs and emissions expenses.


### N **ew M**  **exico community solar projects** 

**N ew**  **M exico utility-scale solar:**  SunEdison ground mounted photovoltaic with first units online in 2011 (five 10-megawatt sites located in L ea and Eddy counties). Electric customers of Xcel Energy in New M exico can apply for Solar* R ewards’ incentives on small and medium solar photovoltaic (P V ) generating systems installed on their homes and businesses. Xcel Energy and Eastern New M exico U niversity- R oswell broke ground on a 35-kilowatt solar installation at the campus on the R oswell International A ir Center. The project is part of Xcel Energy’s New M exico Community Solar program, which is placing solar installations in four eastern and southeastern New M exico communities to educate students and customers about the benefits of solar power. **E n e r g y e f f i c i e n c y a n d**  **load management**

**T exas** 
S pending $4,094,760
S avings G enerator kW 9,220
G enerator MW h 10,275
**N ew**  **M exico** 
S pending $3,025,182
S avings G enerator kW 2,640
G enerator MW h 11,156

**i n n o v at i o n** Xcel Energy pioneered the use of baghouses, which trap the ash from using coal, at our Tolk and Harrington coal plants. While some dispose of coal ash in landfills, we recycle 100 percent of it. In 2009, we recaptured and recycled 363,001 tons of fly ash. The 600-megawatt Hobbs Generating Station in New M exico, with which we have a long-term purchase agreement, uses a cooling system that consumes 90 percent less water than gas-fired powerplants of the same size; uses combinedcycle technology, burning natural gas about 40 percent more efficiently and emitting 800,000 tons less of carbon dioxide a year than an older plant, effectively reducing carbon emissions in our service territory by 3.5 percent. Xcel Energy is seeking approval to add a new, highly efficient 168-megawatt natural gas-fired combustion turbine at its Jones Generating Station near L ubbock. SPS saved 157 billion gallons of fresh water by cooling with recycled municipal treated effluent at Harrington and Nichols generation stations northwest of Amarillo and Jones G eneration Station near L ubbock, since 1980. In many states, such as Texas, Xcel Energy has more renewable energy on its system than is needed for compliance for renewable energy standards. R enewable energy credits ( R E C s) are debundled from renewable energy and sold in the market. In 2009, Xcel Energy sold more than 1.1 million R E C s from wind energy generated in Texas, New Mexico and C olorado. The R E C S were generated from wind produced in 2006 through 2009. **R esource**  **P lanning**  •	 Add 50 MW of solar in New Mexico by 2012 •	 Increase wind portfolio by up to

300 M W, for a long-term purchase agreement total of approximately 750 by 2015 •	 Add 168-MW efficient combustion

turbine unit at Jones Generating Station just east of L ubbock •	 Research biomass opportunities