Southern California Edison Company Demand Response Appendices to SCE-1, Volumes 1-4 ERRATA Replacing Appendix D, Pages D-1 & D-3

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1 Application No.: Exhibit No.: Witness: A SCE-1, Volume 5 (Appendices to SCE-1 Volumes 1 4) - ERRATA (U 338-E) Southern California Edison Company Demand Response Appendices to SCE-1, Volumes 1-4 ERRATA Replacing Appendix D, Pages D-1 & D-3 Before the Public Utilities Commission of the State of California Rosemead, California May 27, 2011

2 Description Contract Period Base Program Customers agree to reduce usage by at least15% of their load in exchange for credit based on the difference between monthly avg. peak period and customer s designated FSL 12 months. Customers or Aggregators may request to adjust their Firm Service Level (FSL) and participation option or opt out of their contract once per year during the Annual Opt-Out Window (Nov. 1-Dec.1) Direct Access, SCE-Bundled Service, or Community Choice Aggregation customers on a TOU or RTP rate Optional Binding Mandatory Curtailment Exempts customers from rotating outages in exchange for partial power reduction of their entire circuit during every rotating outage 12 Months Any size customer, but must have ability to reduce up to 15% of entire circuit load during every rotating outage Operating Months Year-Round Year-Round Curtailment Window Minimum Load (KW) to Qualify Event Trigger 24 Hours/Day-7 Days/Wk, not to exceed 6 hours per event 24 Hours/Day-7 Days/Wk 200kW or <200kW if part of an aggregated group CAISO Imminent Stage 1, CAISO Stage II, Upon determination by SCE s Grid Control Center of the need to implement load reductions in SCE s Service Territory, SCE test Stage III Rotating Outages Notification Time Incentive Payment Event Minimum Load Reduction Event Frequency Limits Participation Option A: 15 min Participation Option B: 30 min Option A: 2 kv: Summer On Peak: $17.89, Mid Peak: $5.50; Winter Mid Peak: $ kv: Summer On Peak: $17.48, Mid Peak: $5.40; Winter Mid Peak: $1.98 >50kV: Summer On Peak: $16.84, Mid Peak: $5.22; Winter Mid Peak: $1.90 Option B: 2 kv: Summer On Peak: $16.45, Mid Peak: $5.02; Winter Mid Peak: $ kv: Summer On Peak: $16.10, Mid Peak: $4.92; Winter Mid Peak: $1.89 >50kV: Summer On Peak: $15.52, Mid Peak: $4.74; Winter Mid Peak: $ % of load, at least 100kW per event One per day up to 6 hrs each, 10 per month, 120 hrs per year 15 minutes Exempted from Rotating Outages 5%, 10%, or 15% of circuit load Match CAISO required RO percentage to next highest 5% increment Non-Compliance Penalties Meter Requirements Enabling Technology Baseline Settlement Method Dual Participation 2kV: $10.21 per kwh above FSL 50kV: $10.00 per kwh above FSL >50kV: $9.63 per kwh above FSL IDR Not Applicable CPP, DBP, RTP, SLRP and OBMC $6.00 per kwh on excess energy IDR/RTEM 10 in 10 baseline with the option to select a day-of adjustment AP-I, BIP, CBP, CPP, DBP, DRC, RTP, SDP and SLRP DEMAND RESPONSE PROGRAM SUMMARY D-1

3 Agricultural and Pumping Scheduled Load Reduction Program Real Time Pricing Description Contract Period Operating Months Curtailment Window Eligible agricultural and pumping customers receive a credit for allowing SCE to automatically shut off total load served. 12 months. Customers may opt-out of their contract during the Annual Opt-Out Window (runs from November 1 through December 1). Agricultural and pumping customers with a measured demand of >37kW or >50 horsepower of connected load Bundled service customers can agree to reduce load by a preset amount during prescheduled days and times 12 months, opt-out period: May. 1-June. 1 Bundled-service customers whose average monthly demand is 100kW Participants are billed for the electricity they consume based on hourly prices driven by temperature. Participants may choose to make adjustments in their electricity usage based on the hourly prices within different temperature ranges (i.e. Extremely Hot, Very Hot, Hot, Moderate, Mild Summer Temperatures, and High Cost/Low Cost Winter). 12 months Bundled service customers and agricultural & pumping customers, whose maximum demand is > 75kW, or have a connected load of > 100 horsepower. Year-Round June 1-September 30 Year-Round 24 Hours/Day-7 Days/Wk Monday-Friday, 8am-8pm, excluding holidays 24 Hours/Day- 7Days/Wk Minimum Load (KW) to Qualify Event Trigger Notification Time Incentive Payment Event Minimum Load Reduction Event Frequency Limits Non-Compliance Penalties One service account with at least 37kW CAISO Imminent Stage 1, CAISO Stage II, Upon determination by SCE s Grid Control Center of the need to implement load reductions in SCE s Service Territory, SCE test $/kw per Meter per Month: Summer Average On-Peak ($17.22) Summer Average Mid-Peak ($3.66) Winter Average Mid-Peak ($1.25) Will not exceed 25 events per calendar year, 6 hours/event, or 150 hours per calendar year 100kW N/A Each day and time as elected by the customer upon enrollment $0.10 per kwh bill credit for qualified power reductions At least 15% reduction in load (at least 100kW), based on customer s max demand in past 12 months. Failure to fully comply with 5 SLRP events will result in termination from program N/A Temperature. Customer must be aware of temperature, which drives prices. Varies based on temperature (see tariff). No penalty, but customers pay higher energy charges the higher the temperature. Meter Requirements Enabling Technology IDR/TOU or IDR/RTEM IDR Communicating interval meters or IDR Comverge remote controlled switch Baseline Method Not Applicable Not Applicable Not Applicable Dual Participation CPP, DBP, PA-RTP, SLRP and OBMC AP-I, BIP, OBMC and SDP BIP and OBMC DEMAND RESPONSE PROGRAM SUMMARY D-3

4 Attachment A - Errata to Appendix D

5 ERRATA TO PREPARED TESTIMONY OF SOUTHERN CALIFORNIA EDISON COMPANY AS REFLECTED IN AMENDED TESTIMONY, VOLUME 5, DEMAND RESPONSE APPENDICES TO SCE-1, VOLUMES 1-4 AMENDED EXHIBIT PAGE LINE CURRENTLY READS CHANGE TO (A) OR ERRATA SCE-1, Volume 5, Appendix D SCE-1, Volume 5, Appendix D D-1 D-3 Row 8, Event Trigger under Base Program Row 8, Event Trigger under Agricultural and Pumping CAISO Stage II, System Emergency, SCE Test After a Warning and before the CAISO need to canvas neighboring balancing authorities and other entities for available exceptional dispatch energy/capacity. CAISO Imminent Stage 1, CAISO Stage II, Upon determination by SCE s Grid Control Center of the need to implement load reductions in SCE s Service Territory, SCE test CAISO Imminent Stage 1, CAISO Stage II, Upon determination by SCE s Grid Control Center of the need to implement load reductions in SCE s Service Territory, SCE test (E) E E