QWMG 1/8/2013

December 2012 Generation Resource Energy and Regulation Deployment Performance

2

NON-IRR GREDP – Energy Deployments

Resources below 85% thresholdQSE

NameResource Name Fuel Type Total Intervals Passed Total Intervals Scored Std Dev(GREDP

MW)GREDP Monthly

ScoreQSE RESOURCE SCLE90 0 1 0.64 0.00QSE RESOURCE GSREH 0 1 1.02 0.00QSE RESOURCE SCGT90 0 6 31.43 0.00QSE RESOURCE GSREH 1 7 1.06 14.29QSE RESOURCE GSNONR 87 110 1.49 79.09QSE RESOURCE CC 201 237 4.96 84.81

* Failed intervals occurred during testing while using the Shutdown RST

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IRR GREDP

Resources below 95% thresholdOct-12 Nov-12 Dec-12

< 10 Intervals 12 7 12>=10<100 Intervals 21 8 16>=100<500 Intervals 10 5 12>=500 Intervals 2 7 5Weighted Averaged GREDP * 89.9% 91.8% 85.0%Weighted Average Deviation * 3.9 MWs 3.0 MWs 4.0 MWsTotal Intervals 9,044 14,580 10,755* Includes all WGRs (not just failures)

4

IRR >= 95%

QSE Name Resource Name Total Intervals Passed Total Intervals Scored Std Dev (ATG-Exp MW) GREDP Monthly ScoreQSE RESOURCE 893 922 3.95 96.85QSE RESOURCE 436 458 3.75 95.20QSE RESOURCE 427 447 3.54 95.53QSE RESOURCE 374 386 4.37 96.89QSE RESOURCE 308 314 4.33 98.09QSE RESOURCE 288 302 3.35 95.36QSE RESOURCE 257 258 3.32 99.61QSE RESOURCE 154 154 4.39 100.00QSE RESOURCE 78 78 3.70 100.00QSE RESOURCE 44 46 3.54 95.65QSE RESOURCE 43 43 5.32 100.00QSE RESOURCE 24 24 3.22 100.00QSE RESOURCE 21 22 3.74 95.45QSE RESOURCE 20 20 1.84 100.00QSE RESOURCE 9 9 5.20 100.00QSE RESOURCE 8 8 2.60 100.00QSE RESOURCE 5 5 1.95 100.00QSE RESOURCE 4 4 4.48 100.00QSE RESOURCE 1 1 2.91 100.00QSE RESOURCE 1 1 1.99 100.00QSE RESOURCE 1 1 3.06 100.00QSE RESOURCE 1 1 3.10 100.00QSE RESOURCE 1 1 4.47 100.00QSE RESOURCE 1 1 2.52 100.00QSE RESOURCE 1 1 4.68 100.00

5

IRR < 95%

QSE Name Resource Name Total Intervals Passed Total Intervals Scored Std Dev (ATG-Exp MW) GREDP Monthly ScoreQSE RESOURCE 888 949 7.45 93.57QSE RESOURCE 312 817 4.11 38.19QSE RESOURCE 715 801 2.43 89.26QSE RESOURCE 529 626 7.81 84.50QSE RESOURCE 448 561 5.17 79.86QSE RESOURCE 378 431 0.98 87.70QSE RESOURCE 263 352 4.11 74.72QSE RESOURCE 206 245 3.39 84.08QSE RESOURCE 165 243 3.41 67.90QSE RESOURCE 214 232 1.63 92.24QSE RESOURCE 158 230 3.01 68.70QSE RESOURCE 210 230 1.89 91.30QSE RESOURCE 197 228 0.94 86.40QSE RESOURCE 196 226 0.91 86.73QSE RESOURCE 172 215 3.60 80.00QSE RESOURCE 170 197 2.13 86.29QSE RESOURCE 113 119 6.36 94.96

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IRR < 95% Continued

QSE Name Resource Name Total Intervals Passed Total Intervals Scored Std Dev (ATG-Exp MW) GREDP Monthly ScoreQSE RESOURCE 50 56 2.24 89.29QSE RESOURCE 38 49 5.69 77.55QSE RESOURCE 28 43 1.16 65.12QSE RESOURCE 33 40 4.08 82.50QSE RESOURCE 26 38 1.76 68.42QSE RESOURCE 31 37 4.63 83.78QSE RESOURCE 28 34 3.62 82.35QSE RESOURCE 30 32 2.92 93.75QSE RESOURCE 23 29 3.44 79.31QSE RESOURCE 25 28 4.27 89.29QSE RESOURCE 10 28 0.87 35.71QSE RESOURCE 21 25 4.84 84.00QSE RESOURCE 15 21 4.74 71.43QSE RESOURCE 11 12 3.21 91.67QSE RESOURCE 7 11 7.87 63.64QSE RESOURCE 9 10 3.34 90.00QSE RESOURCE 2 9 1.44 22.22QSE RESOURCE 7 8 2.83 87.50QSE RESOURCE 5 8 2.54 62.50QSE RESOURCE 0 6 3.01 0.00QSE RESOURCE 4 5 4.33 80.00QSE RESOURCE 3 5 2.03 60.00QSE RESOURCE 1 4 3.17 25.00QSE RESOURCE 2 4 3.22 50.00QSE RESOURCE 0 1 0.31 0.00QSE RESOURCE 0 1 1.63 0.00QSE RESOURCE 0 1 0.98 0.00QSE RESOURCE 0 1 3.58 0.00

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GREDP Scenario Analysis

NON-IRRs  

MW Threshold % of BP Threshold % Overall Passed Failed % Passing

5 N/A 85% 215 54 79.9%

10 N/A 85% 252 17 93.7%

5 5% 85% 257 12 95.5%

15 N/W 85% 264 3 98.9%

8 8% 85% 261 6 97.8%

IRRs  MW Threshold % of BP

ThresholdMeasure on the Low Side?

% Overall Passed Failed % Passing

5 5% No 95% 34 36 48.6%8 8% No 95% 39 31 55.7%1 (when BP = 0) 10% No 95% 25 45 35.7%5 5% No 85% 45 25 64.3%8 8% No 85% 52 8 86.7%1 (when BP = 0) 10% No 85% 40 30 57.1%5 5% Yes 95% 20 50 28.6%8 8% Yes 95% 30 40 42.9%1 (when BP = 0) 10% Yes 95% 14 56 20.0%5 5% Yes 85% 32 38 45.7%8 8% Yes 85% 40 30 57.1%1 (when BP = 0) 10% Yes 85% 21 49 30.0%