Circuit Reliability Review

Circuit Reliability Review Covina January 2018

Building a Smarter Grid for Southern California Southern California Edison is developing an electric grid to support California s transition to a clean and sustainable future that meets the needs and expectations of our customers. We are investing more than $13 billion in the power distribution grid over three years (2017-19). Our main investment goal is to increase power reliability through significant upgrades. The investments include: Upgrading cables, poles, switches and transformers Updating the grid so it can accommodate new technologies, such as smart inverters that will allow for the twoway flow of solar energy Adapting the power system to accommodate future California policy related to energy storage, electric transportation and renewable energy Providing enhanced automation and monitoring devices to allow us to better respond to changes on the grid Our investments in local communities will help ensure that customers receive safe, reliable, and affordable electricity now and in the future. Learn more at edison.com/innovation 2

Understanding Your Reliability Report As your electric utility, we want you to always have power when you need it. To get there, we constantly track and monitor electric outages across our service territory, and we measure our system reliability from this data. The two metrics we rely on are common in the electric utility industry: the System Average Interruption Duration Index (SAIDI) and the System Average Interruption Frequency Index (SAIFI). Both are described in more detail on the next page. Replacing and upgrading our infrastructure will help SCE maintain or improve SAIDI and SAIFI measurements. This report provides historical reliability data for the circuits that serve your jurisdiction and our proposed infrastructure upgrades for the current year. To view other reliability reports, visit sce.com>outage Center>Maintaining Reliable Service 3

Reliability Metrics MOMENTARY OUTAGES: OUTAGES LASTING 5 MINUTES OR LESS SUSTAINED OUTAGES: OUTAGES LASTING LONGER THAN 5 MINUTES MAIFI: o The number of times the average customer is interrupted by Momentary outages each year. SAIFI: o The number of times the average customer is interrupted by Sustained outages each year. SAIDI: o The cumulative amount of time the average customer is interrupted by Sustained outages each year. 4

Cities in the COVINA District CityList1 AVOCADO HEIGHTS AZUSA CHARTER OAK CITRUS CLAREMONT COVINA DIAMOND BAR GLENDORA HACIENDA HEIGHTS INDUSTRY LA PUENTE LA VERNE POMONA ROWLAND HEIGHTS SAN DIMAS SOUTH SAN JOSE HILLS VALINDA VINCENT WALNUT WEST COVINA WEST PUENTE VALLEY 5

* Exclusions are days which utilities are allowed to remove from their metrics because the outages on those days were caused by a severe acts of nature. **In the columns showing Rank, lower numbers indicate poorer performance. 6

Overview of Covina CircuitList1 There are 30 circuits that serve Covina 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers ABIGAIL(12KV) 1,327 - - - ALLISON(12KV) 895 - - - BARBARA(12KV) 1,289 - - - BARBOSSA(12KV) 2,035 - - - BENDER(12KV) 2,269 - - - BOSCO(12KV) 531 - - - CHRISTY(12KV) 564 - - - CREVOLIN(12KV) 1,282 - - - DAMERAL(12KV) 1,517 - - - DEANNA(12KV) 2,210 - - - DENISE(12KV) 1,659 - - - EGMONT(12KV) 840 - - - ELEANOR(12KV) 2,570 - - - GERTRUDE(12KV) 1,470 - - - GRAVEL(12KV) 1,632 - - - HAIG(12KV) 2,009 - - - IRENE(12KV) 539 - - - JARVIS(12KV) 860 - - - JOJO(12KV) 496 - - - KUMQUAT(12KV) 2,083 - - - LYNNE(12KV) 2,278 - - - MAYBELL(12KV) 1,619 - - - MEDAL(12KV) 1,537 - - - MICHELLE(12KV) 1,090 - - - REEDER(12KV) 1,624 - - - RELISH(12KV) 1,462 - - - SUNKIST(12KV) 1,343 - - - TIENDA(12KV) 3,159 - - - VECINO(12KV) 1,961 - - - VIAVERDE(12KV) 1,683 - - - Grand Total 45,833 7

Reliability History of Circuits Serving Covina (No Exclusions) BarChart SAIDI (average minutes of sustained interruptions) 160.0 140.0 120.0 100.0 80.0 60.0 40.0 20.0 0.0 2014 2015 2016 2017 134.5 139.7 129.0 112.1 114.8 103.7 87.8 76.0 Covina SAIFI (average frequency of sustained interruptions) MAIFI (average frequency of momentary interruptions) 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 2.0 1.5 1.0 0.5 0.0 0.7 1.6 1.0 0.9 0.8 1.4 1.5 1.4 0.8 1.0 1.1 1.6 0.8 1.9 1.2 1.8 SCE SYSTEMWIDE ** Exclusions are days which utilities are allowed to remove from their metrics because the outages on those days were caused by acts of nature. **Data is as of 02/20/2018, data can be slightly different due to outage data validation process 8

Causes of Repair Outages in Covina 2017 SAIDIChart Contributions to SAIDI by Outage Cause Vegetation /Animal 0.5% Equipment Failure e.g., in-service failure of transformer, switch, or conductors Vegetation/Animal e.g., tree branch, rodent, or bird causing a short circuit between conductors Other e.g., patrolled but no cause found Operations e.g., urgent maintenance w/o 3-day notice 3 rd Party e.g., balloon, car hit pole, dig-in Other 6.9% Operation 10.2% Weather /Fire /Earthquake 17.5% 3rd Party 13.3% Equipment Failure 51.6% 3rd Party Equipment Failure Operation Other Vegetation /Animal Weather /Fire /Earthquake SAIDI = the cumulative amount of time the average customer is interrupted by sustained outages each year. 9

Causes of Repair Outages in Covina 2017 SAIFIChart Contributions to SAIFI by Outage Cause Vegetation /Animal 0.3% Equipment Failure e.g., in-service failure of transformer, switch, or conductors Vegetation/Animal e.g., tree branch, rodent, or bird causing a short circuit between conductors Other e.g., patrolled but no cause found Operations e.g., urgent maintenance w/o 3-day notice 3 rd Party e.g., balloon, car hit pole, dig-in Other 8.7% Operation 14.8% Weather /Fire /Earthquake 12.7% 3rd Party 12.2% Equipment Failure 51.2% 3rd Party Equipment Failure Operation Other Vegetation /Animal Weather /Fire /Earthquake SAIFI = the number of times the average customer is interrupted by sustained outages each year 10

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Back-up Slides Reliability Histories of Circuits Serving Covina Updated through Dec 2017

Average Reliability of 30 Circuits Serving Covina CitySummary 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI 30 Circuits Serving Covina -- Total Customers: 45,833 87.8 0.7 1.6 129.0 0.8 1.5 103.7 0.8 1.0 15.3 0.3 0.6 27.4 0.2 0.4 21.0 0.2 0.8 12.4 0.2 0.1 76.0 0.8 1.9 3rd Party 39% 34% 19% 19% 22% 23% 10% 18% 36% 2% 4% 11% 24% 27% 9% 2% 2% 14% 23% 22% 13% 13% 12% 12% Equipment Failure 35% 32% 27% 26% 32% 10% 35% 39% 10% 64% 56% 68% 17% 8% 19% 86% 94% 42% 54% 41% 31% 52% 51% 44% Operation 4% 5% 1% 29% 15% 5% 25% 14% 7% 22% 34% - 12% 5% 11% 3% 3% 4% 4% 4% - 10% 15% 4% Other 4% 1% 28% 8% 25% 52% 3% 1% 11% 3% 5% 9% 4% 3% 32% 8% 2% 37% 17% 31% 56% 7% 9% 29% Vegetation/Animal 10% 19% 20% 2% 2% 8% 4% 9% 14% - - - 0% 0% 11% 0% 0% 2% 2% 1% - 1% 0% 3% Weather/Fire/Earthquake 8% 8% 5% 16% 5% 2% 23% 18% 22% 9% 0% 12% 43% 58% 18% - - - 0% 0% - 18% 13% 8% SCE SYSTEMWIDE 112.1 1.0 1.4 114.8 0.9 1.4 134.5 1.1 1.6 42.6 0.3 0.5 23.6 0.2 0.4 29.2 0.2 0.4 44.3 0.4 0.5 139.7 1.2 1.8 Notes: No outages are excluded from the metrics. Outage Causes: Other: e.g., patrolled but no cause could be found Operations: e.g., urgent maintenance w/o 3-day notice to customers 3 rd Party: e.g., balloons, car hit pole, dig-in Vegetation/Animal: e.g., tree branch, rodent, or bird causing short circuit across conductors SAIDI (minutes) = the cumulative amount of time the average customer is interrupted by sustained (longer than 5 minutes) outages. SAIFI (interruptions) = the number of times the average customer is interrupted by sustained outages. MAIFI (interruptions) = the number of times the average customer is interrupted by momentary " (lasting 5 minutes or less) outages. 14

Reliability Histories for Individual Circuits Serving Covina - 1 of 8 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI ABIGAIL(12KV) - Customers: 1,327 2.3 0.0-66.8 0.9 0.1 58.6 1.1 1.0 - - CircuitHistory - 1.9 0.0-6.1 0.0 1.0 - - - 8.0 0.0 1.0 3rd Party - - - - - - - - - - - 1- - - - - - - - - - - - - Equipment Failure - - - 76% 91% - 1% 0% - - - - - - - 100% 100% 100% - - - 76% 80% 100% Operation - - - 16% 6% - 1% 1% - - - - - - - - - - - - - - - - Other - - - - - 100% - - - - - - - - - - - - - - - - - - Vegetation/Animal 100% 100% - 9% 4% - 78% 96% 100% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 21% 3% - - - - 100% 100% - - - - - - - 24% 20% - ALLISON(12KV) - Customers: 895 - - - 142.8 2.7 4.6 5.9 0.0 0.6 - - - - - 1.0 - - - - - - - - 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - 56% 79% 79% - - 100% - - - - - - - - - - - - - - - Operation - - - 43% 16% - 100% 100% - - - - - - - - - - - - - - - - Other - - - 1% 5% 21% - - - - - - - - 100% - - - - - - - - 100% Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - - BARBARA(12KV) - Customers: 1,289 - - - - - 1.3 25.6 0.1 0.9 - - - 61.7 0.1-45.2 0.1 2.0 0.5 0.0-107.4 0.1 2.0 3rd Party - - - - - - - - - - - - - - - - - 50% - - - - - 50% Equipment Failure - - - - - - 98% 97% - - - - - - - - - - 100% 100% - 0% 1% - Operation - - - - - 100% 2% 3% 100% - - - 100% 100% - - - - - - - 57% 42% - Other - - - - - - - - - - - - - - - 100% 100% 50% - - - 42% 57% 50% Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - - BARBOSSA(12KV) - Customers: 2,035 - - 1.0 0.5 0.0 2.0 0.2 0.0 2.0 15.8 1.0-2.9 0.0 1.0 - - - - - - 18.7 1.0 1.0 3rd Party - - - - - - - - 50% - - - - - - - - - - - - - - - Equipment Failure - - - 100% 100% - 100% 100% 50% - - - 9% 7% 100% - - - - - - 1% 0% 100% Operation - - - - - - - - - 100% 100% - - - - - - - - - - 85% 99% - Other - - 100% - - 100% - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - 91% 93% - - - - - - - 14% 1% - Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - - 15

Reliability Histories for Individual Circuits Serving Covina - 2 of 8 CircuitHistory 2 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI 2017 BENDER(12KV) - Customers: 2,269 134.2 0.5 1.1 292.1 1.0 2.0 26.7 0.0-2.9 0.0-12.6 0.0-9.9 0.1-0.3 0.0-25.6 0.1-3rd Party 100% 96% 100% - - - 8% 44% - - - - - - - 100% 100% - - - - 39% 52% - Equipment Failure - - - 2% 2% - 92% 56% - 100% 100% - 100% 100% - - - - - - - 60% 44% - Operation 0% 4% - 98% 98% - - - - - - - - - - - - - 100% 100% - 1% 5% - Other - - - - - 100% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - - BOSCO(12KV) - Customers: 531 - - 1.0 - - 2.0 - - 1.0 - - - - - - - - 1.0 22.0 1.0-22.0 1.0 1.0 3rd Party - - - - - 49% - - 100% - - - - - - - - 100% - - - - - 100% Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - 100% - - 51% - - - - - - - - - - - - 100% 100% - 100% 100% - Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - - CHRISTY(12KV) - Customers: 564 50.4 1.0-18.4 0.0 1.0 27.4 0.2 1.0 - - - 50.6 0.1 - - - 1.0 1.1 0.0-51.8 0.1 1.0 3rd Party 15% 1% - - - - 100% 100% 100% - - - - - - - - - - - - - - - Equipment Failure 85% 99% - - - - - - - - - - 100% 100% - - - - - - - 98% 83% - Operation - - - - - - - - - - - - - - - - - - 100% 100% - 2% 17% - Other - - - - - 100% - - - - - - - - - - - 100% - - - - - 100% Weather/Fire/Earthquake - - - 100% 100% - - - - - - - - - - - - - - - - - - - CREVOLIN(12KV) - Customers: 1,282 3.8 0.1 1.0 69.8 0.2 2.0 10.7 0.0 - - - - - - - 31.5 0.2 - - - - 31.5 0.2-3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - 38% 12% - 100% 100% - - - - - - - 100% 100% - - - - 100% 100% - Operation 100% 100% - 62% 88% - - - - - - - - - - - - - - - - - - - Other - - - - - 100% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - 100% - - - - - - - - - - - - - - - - - - - - - 16

Reliability Histories for Individual Circuits Serving Covina - 3 of 8 CircuitHistory 3 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI DAMERAL(12KV) - Customers: 1,517 276.0 1.8 1.4 228.9 1.7 3.5 79.0 0.7 0.3 - - 1.0 - - - 5.5 0.0 1.0 - - 1.0 5.5 0.0 3.0 3rd Party 38% 39% 19% - - - 100% 100% 100% - - - - - - - - 100% - - - - - 33% Equipment Failure 62% 61% 81% 86% 41% 45% - - - - - 100% - - - 100% 100% - - - - 100% 100% 33% Operation - - - 4% 5% - - - - - - - - - - - - - - - - - - - Other - - - - - 29% - - - - - - - - - - - - - - 100% - - 33% Weather/Fire/Earthquake - - - 10% 54% 26% - - - - - - - - - - - - - - - - - - DEANNA(12KV) - Customers: 2,210 99.4 2.3 3.1 89.4 1.0 1.0 146.0 2.1 1.0 10.6 0.3 1.0 153.4 1.1 2.0 1.4 0.0 1.0 0.7 0.0-166.1 1.3 4.0 3rd Party 66% 61% 42% 75% 96% - 36% 47% 100% - - - - - - - - - - - - - - - Equipment Failure 1% 0% - 8% 1% - 46% 49% - - - - 3% 2% - 100% 100% - 66% 20% - 4% 2% - Operation 1% 0% - 17% 3% - - - - - - - 0% 0% - - - - 34% 80% - 0% 0% - Other - - 29% - - - 11% 2% - 100% 100% 100% 6% 5% 50% - - 100% - - - 12% 24% 75% Vegetation/Animal 32% 39% 29% - - 100% 7% 3% - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - - - - 90% 93% 50% - - - - - - 83% 74% 25% DENISE(12KV) - Customers: 1,659 - - - 14.1 0.0-285.7 3.8 1.7 - - - - - - 9.6 0.0 1.0 1.1 0.1-10.7 0.1 1.0 3rd Party - - - - - - 1% 2% - - - - - - - - - - - - - - - - Equipment Failure - - - 100% 100% - 17% 46% - - - - - - - 100% 100% - - - - 90% 12% - Operation - - - - - - 12% 6% - - - - - - - - - - 100% 100% - 10% 88% - Other - - - - - - - - - - - - - - - - - 100% - - - - - 100% Weather/Fire/Earthquake - - - - - - 70% 46% 100% - - - - - - - - - - - - - - - EGMONT(12KV) - Customers: 840 - - 1.0 172.8 0.3 1.0 196.4 1.0 1.0 61.1 1.1-33.0 0.2-27.6 0.3 2.4 6.0 0.1-127.6 1.7 2.4 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - 100% 100% - 77% 94% - 95% 75% - 97% 100% 59% - - - 82% 88% 59% Operation - - - 100% 99% - - - - 23% 6% - 5% 25% - - - - - - - 12% 7% - Other - - 100% - - 100% - - 100% - - - - - - - - - - - - - - - Vegetation/Animal - - - 0% 1% - - - - - - - - - - 3% 0% 41% 100% 100% - 5% 5% 41% Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - - 17

Reliability Histories for Individual Circuits Serving Covina - 4 of 8 CircuitHistory 4 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI ELEANOR(12KV) - Customers: 2,570 14.5 0.0-217.7 0.3 0.9 12.1 0.0 1.9 - - 1.0 31.0 0.1 - - - 1.0 - - - 31.0 0.1 2.0 3rd Party - - - 69% 50% - - - 45% - - - - - - - - - - - - - - - Equipment Failure 77% 30% - - - - - - - - - 100% 100% 100% - - - - - - - 100% 100% 50% Operation 23% 70% - - - 100% 60% 77% - - - - - - - - - - - - - - - - Other - - - 31% 50% - - - - - - - - - - - - 100% - - - - - 50% Weather/Fire/Earthquake - - - - - - 40% 23% 55% - - - - - - - - - - - - - - - GERTRUDE(12KV) - Customers: 1,470 118.4 1.0 1.0 56.3 0.9 0.1 278.0 1.0 1.0 - - - 124.9 1.0 - - - 1.0 - - - 124.9 1.0 1.0 3rd Party - - - - - - - - 94% - - - 100% 100% - - - - - - - 100% 100% - Equipment Failure 100% 100% 100% 100% 100% 100% 89% 83% 6% - - - - - - - - - - - - - - - Operation - - - 0% 0% - 1% 10% - - - - - - - - - - - - - - - - Other - - - - - - 10% 6% - - - - - - - - - 100% - - - - - 100% Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - - GRAVEL(12KV) - Customers: 1,632 18.3 0.1 2.0 89.1 1.1-2.9 0.0 1.0 3.0 0.0 - - - - - - - - - 1.0 3.0 0.0 1.0 3rd Party 44% 21% 100% 1% 7% - - - - 88% 93% - - - - - - - - - - 88% 93% - Equipment Failure 42% 44% - 99% 93% - 7% 24% - 12% 7% - - - - - - - - - - 12% 7% - Operation 13% 36% - - - - 93% 76% - - - - - - - - - - - - - - - - Other - - - - - - - - 100% - - - - - - - - - - - 100% - - 100% Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - - HAIG(12KV) - Customers: 2,009 18.0 1.0 1.0 295.6 3.8 2.3 186.2 2.6 - - - - 4.0 0.0 - - - - 9.9 0.0-13.9 0.1-3rd Party - - - 80% 29% 57% - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - 45% 62% - - - - 40% 10% - - - - 24% 24% - 28% 19% - Operation - - - 1% 0% - 7% 36% - - - - 60% 90% - - - - 76% 76% - 72% 81% - Other - - - 19% 70% 43% - - - - - - - - - - - - - - - - - - Vegetation/Animal 100% 100% 100% - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 49% 2% - - - - - - - - - - - - - - - - 18

Reliability Histories for Individual Circuits Serving Covina - 5 of 8 CircuitHistory 5 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI IRENE(12KV) - Customers: 539 - - - - - 1.0 283.0 0.8 1.2 - - - - - - - - 1.0 - - - - - 1.0 3rd Party - - - - - 100% - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - 100% - - - - - 100% Weather/Fire/Earthquake - - - - - - 100% 100% 100% - - - - - - - - - - - - - - - JARVIS(12KV) - Customers: 860 254.5 0.7 0.1 2012.3 1.7 1.4 1402.1 0.2 0.1 52.6 0.0 - - - - 13.7 0.0-171.8 2.0-238.1 2.0-3rd Party 16% 41% - 3% 20% 71% - - - - - - - - - - - - - - - - - - Equipment Failure - - - 3% 5% - 13% 46% - - - - - - - - - - 100% 100% - 72% 98% - Operation 9% 18% - 35% 69% 13% 87% 54% - - - - - - - - - - - - - - - - Other 55% 25% 100% 3% 4% 15% - - 100% - - - - - - 100% 100% - - - - 6% 0% - Weather/Fire/Earthquake 20% 16% - 55% 3% 2% - - - 100% 100% - - - - - - - - - - 22% 1% - JOJO(12KV) - Customers: 496 212.7 2.3 1.0 - - 1.0 - - - - - - - - - 35.4 0.1 - - - - 35.4 0.1-3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 100% 100% 100% - - - - - - - - - - - - 100% 100% - - - - 100% 100% - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - 100% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - - KUMQUAT(12KV) - Customers: 2,083 189.6 1.3 3.9 14.5 0.1-5.9 0.0 2.0 81.3 2.1 1.8 - - 1.0 147.0 1.9 2.7 - - - 228.4 4.0 5.6 3rd Party 41% 77% - - - - - - - 2% 5% 49% - - - - - - - - - 1% 3% 16% Equipment Failure 55% 15% 26% 32% 43% - 62% 68% - 87% 55% 51% - - - 92% 97% 73% - - - 90% 75% 53% Operation - - - 68% 57% - 38% 32% 50% 11% 41% - - - - 8% 3% 27% - - - 9% 23% 13% Other 4% 8% 49% - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - 26% - - - - - 50% - - - - - 100% - - - - - - - - 18% Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - - 19

Reliability Histories for Individual Circuits Serving Covina - 6 of 8 CircuitHistory 6 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI LYNNE(12KV) - Customers: 2,278 293.8 0.8 0.3 0.1 0.0 1.0 128.8 1.0 1.6 0.1 0.0-155.6 1.3 0.7 - - 1.0 0.8 0.0-156.5 1.3 1.7 3rd Party 90% 81% 100% - - - - - 60% - - - 31% 20% 100% - - - - - - 31% 20% 43% Equipment Failure 10% 19% - - - - 4% 1% - - - - - - - - - - - - - - - - Operation - - - 100% 100% - 1% 1% - 100% 100% - 1% 1% - - - - 100% 100% - 2% 1% - Other - - - - - 100% - - - - - - 2% 0% - - - 100% - - - 2% 0% 57% Weather/Fire/Earthquake - - - - - - 95% 98% 40% - - - 65% 79% - - - - - - - 65% 78% - MAYBELL(12KV) - Customers: 1,619 38.2 0.2 3.0 139.1 1.7 3.2 53.8 0.1 1.0 19.0 0.2-21.1 0.0 1.0 - - - 2.4 0.0-42.4 0.3 1.0 3rd Party - - 33% 28% 37% 74% - - 100% - - - - - - - - - 30% 46% - 2% 4% - Equipment Failure 44% 13% - 33% 49% - 81% 73% - - - - 100% 100% 100% - - - - - - 50% 16% 100% Operation 7% 68% - 5% 2% - 14% 11% - 100% 100% - - - - - - - - - - 45% 75% - Other - - 33% 20% 4% 26% 5% 15% - - - - - - - - - - - - - - - - Vegetation/Animal - - 33% 13% 7% - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 49% 18% - - - - - - - - - - - - - - - - 70% 54% - 4% 5% - MEDAL(12KV) - Customers: 1,537 129.0 1.7 2.0 138.7 0.8 5.0 58.0 0.9 1.5 5.0 0.1 1.0 23.9 0.1 0.4 73.8 0.7 1.6 88.9 1.0 0.5 191.5 1.9 3.5 3rd Party 44% 51% 43% 2% 42% 40% - - - - - - - - - 0% 0% 61% 96% 98% 100% 45% 53% 42% Equipment Failure 2% 1% - 82% 29% 20% 91% 99% 34% - - - 4% 1% - 95% 92% 29% 1% 1% - 38% 33% 13% Operation 7% 25% - 16% 29% - 0% 0% - 41% 97% - 96% 99% 100% 4% 8% - - - - 15% 12% 12% Other - - - - - 20% - - 66% - - - - - - - - 10% - - - - - 5% Vegetation/Animal 1% 1% 57% - - 20% 1% 0% - - - - - - - - - - 3% 2% - 1% 1% - Weather/Fire/Earthquake 45% 22% - - - - 8% 1% - 59% 3% 100% - - - - - - - - - 2% 0% 28% MICHELLE(12KV) - Customers: 1,090 - - - 164.3 2.0 3.0 90.4 2.1 2.0 - - - - - - - - - 0.3 0.0-0.3 0.0-3rd Party - - - 10% 51% 33% 20% 2% - - - - - - - - - - - - - - - - Equipment Failure - - - 67% 4% - 8% 48% 50% - - - - - - - - - - - - - - - Operation - - - - - - 25% 46% - - - - - - - - - - 100% 100% - 100% 100% - Other - - - 15% 41% 67% 43% 3% 50% - - - - - - - - - - - - - - - Vegetation/Animal - - - 8% 5% - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 4% 1% - - - - - - - - - - - - - - - - 20

Reliability Histories for Individual Circuits Serving Covina - 7 of 8 CircuitHistory 7 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI REEDER(12KV) - Customers: 1,624 88.3 1.1-37.7 0.1 1.0 3.6 0.0 - - - - 11.8 0.0 1.0 4.6 0.0-50.5 1.0-66.9 1.1 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 6% 4% - 17% 11% - 86% 45% - - - - - - - - - - - - - - - - Operation 1% 1% - 8% 6% - 14% 55% - - - - - - - - - - - - - - - - Other - - - 75% 83% 100% - - - - - - 100% 100% 100% 55% 84% - 100% 100% - 97% 99% 100% Vegetation/Animal 0% 1% - - - - - - - - - - - - - 45% 16% - - - - 3% 1% - Weather/Fire/Earthquake 92% 95% - - - - - - - - - - - - - - - - - - - - - - RELISH(12KV) - Customers: 1,462 67.0 0.3 1.0 16.7 0.1-235.4 1.8 1.8 10.3 0.0 1.0 16.0 0.0 2.0 28.6 0.1 3.8 - - - 54.9 0.2 6.8 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 84% 89% 100% 25% 4% - 88% 48% - - - - - - - 100% 100% 100% - - - 52% 79% 56% Operation 16% 11% - 75% 96% - 8% 51% - - - - 100% 100% 50% - - - - - - 29% 13% 15% Other - - - - - - - - - - - - - - 50% - - - - - - - - 15% Weather/Fire/Earthquake - - - - - - 4% 1% 100% 100% 100% 100% - - - - - - - - - 19% 8% 15% SUNKIST(12KV) - Customers: 1,343 6.0 0.0 1.7 36.6 0.1 0.9 92.1 1.5 0.8 46.1 0.3 0.8 2.0 0.0 1.0 - - - - - - 48.0 0.3 1.8 3rd Party - - - - - - - - - 6% 74% 100% - - - - - - - - - 6% 73% 43% Equipment Failure 4% 2% 59% - - - - - - - - - - - - - - - - - - - - - Operation 96% 98% 41% 14% 5% - - - - 94% 26% - - - - - - - - - - 90% 26% - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - 86% 95% 100% 100% 100% 100% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - - - - 100% 100% 100% - - - - - - 4% 0% 57% TIENDA(12KV) - Customers: 3,159 66.8 0.4 3.0 24.2 0.1 1.1 63.1 1.1 - - - - - - - - - - 0.3 0.0-0.3 0.0-3rd Party - - - - - - 98% 99% - - - - - - - - - - - - - - - - Equipment Failure 93% 94% 67% 100% 100% - 2% 1% - - - - - - - - - - - - - - - - Operation 7% 6% - - - - - - - - - - - - - - - - 100% 100% - 100% 100% - Other - - 33% - - 100% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - - - - - - - 21

Reliability Histories for Individual Circuits Serving Covina - 8 of 8 CircuitHistory 8 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI VECINO(12KV) - Customers: 1,961 185.7 1.1 1.0 7.7 0.0 2.0 69.2 0.7 2.0 - - - - - - - - - 76.9 0.6 0.9 76.9 0.6 0.9 3rd Party - - - 100% 100% 50% - - 49% - - - - - - - - - - - - - - - Equipment Failure 1% 1% - - - - - - - - - - - - - - - - 100% 100% 100% 100% 100% 100% Operation 9% 8% - - - - 3% 3% - - - - - - - - - - - - - - - - Other - - 100% - - 50% - - - - - - - - - - - - - - - - - - Vegetation/Animal 90% 92% - - - - - - 51% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 97% 97% - - - - - - - - - - - - - - - - VIAVERDE(12KV) - Customers: 1,683 80.6 1.3 7.3 129.0 2.3 1.0 1.2 0.0 0.9 148.5 2.4 6.6 - - - 168.3 1.2 1.0 - - - 316.8 3.6 7.6 3rd Party - - - - - - - - 100% - - - - - - - - - - - - - - - Equipment Failure 91% 96% 32% 67% 53% - - - - 100% 100% 100% - - - 100% 99% 100% - - - 100% 100% 100% Operation 6% 3% - 17% 3% 0% - - - - - - - - - 0% 1% - - - - 0% 0% - Other - - 27% 16% 44% 100% - - - - - - - - - - - - - - - - - - Vegetation/Animal - - 27% - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 3% 1% 14% - - - 100% 100% - - - - - - - - - - - - - - - - 22