Base Point/GREDP Analysis 8/4 - 8/5/2010

Settlement Intervals Analyzed = 38,675•During 24 Hour LFC test: 90 Settlement intervals minus 5 with bad data = 85 intervals by 455 Resources

•95.23% Percent of Intervals that Resources passed GREDP and

did not receive BPD charge (36,832)

• 1.02% Percent of Intervals that Resources failed GREDP and received

BPD charge (394)

•3.75% Percent of Intervals that did not match (either fail

GREDP/no BPD or pass

GREDP/with BPD (1,449)

• 1.63% Percent of “no match” intervals that are WGR Resources (631)

• 2.12% Percent of “no match” intervals that are non-WGR Resources* (818)

*These “no match” intervals caused by various exclusions on either side

Base Point/GREDP Analysis 8/4 - 8/5/2010

“No match” WGR intervals caused by mismatch HSL data

Total number of all WGR SCED intervals analyzed = 24,030

62.98% Percentage of intervals SCED HSL less than COP HSL

27.37% Percentage of intervals SCED HSL greater than COP HSL

9.65% Percentage of intervals SCED HSL equal to COP HSL

Options for Reducing Instances of WGR Base Point Deviation Charges:

•Increase QIRR which is currently set at 2

•Increase KIRR which currently set at 10% dead band

•Use SCED HSL in Base Point charge calculation (requires system change)