Circuit Reliability Review

Circuit Reliability Review Pico Rivera 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 MONTEBELLO District CityList1 ALHAMBRA EAST LOS ANGELES EL MONTE LOS ANGELES MONTEBELLO MONTEREY PARK NORTH EL MONTE PICO RIVERA ROSEMEAD SOUTH EL MONTE SOUTH SAN GABRIEL 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 Pico Rivera CircuitList1 There are 30 circuits that serve Pico Rivera 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers BALLARD(12KV) 1,999 - - - BEXLEY(4.16KV) 772 - - - BRONCO(12KV) 2,454 - - - CADILLAC(12KV) 406 - - - CHURCH(12KV) 1,593 - - - COFFEE(4.16KV) 644 - - - CORNWALL(12KV) 1,396 - - - CORVETTE(12KV) 256 - - - DECOSTA(12KV) 2,512 - - - DEUCE(12KV) 1,661 - - - DODGE(16KV) 2,082 - - - DURFEE(4.16KV) 719 - - - ESCAMILLA(12KV) 2,548 - - - GASPAR(12KV) 409 - - - JULEP(12KV) 100 - - - MAXINE(4.16KV) 627 - - - MILLERGROVE(12KV) 2,435 - - - PERKINS(12KV) 1,578 - - - REGINA(4.16KV) 875 - - - SANKA(4.16KV) 552 - - - SERAPIS(4.16KV) 630 - - - STAMPER(12KV) 983 - - - STOAKES(12KV) 230 - - - STUTZ(12KV) 2,425 - - - SUNGLOW(4.16KV) 838 - - - TOPEKA(4.16KV) 845 - - - TORPEDO(12KV) 1,633 - - - UNITY(4.16KV) 317 - - - VICKI(12KV) 1,273 - - - YORKTOWN(12KV) 2,190 - - - Grand Total 36,982 7

Reliability History of Circuits Serving Pico Rivera (No Exclusions) BarChart 200.0 182.6 2014 2015 2016 2017 181.9 SAIDI (average minutes of sustained interruptions) 150.0 100.0 50.0 112.1 111.9 114.8 135.1 134.5 139.7 Pico Rivera 0.0 SAIFI (average frequency of sustained interruptions) 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 1.1 1.0 1.0 0.9 0.6 1.1 0.9 1.2 SCE SYSTEMWIDE ** Exclusions are days which utilities are allowed to MAIFI (average frequency of momentary interruptions) 2.0 1.5 1.0 0.5 1.4 1.4 1.1 1.2 1.2 1.6 1.1 1.8 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 0.0 8

Causes of Repair Outages in Pico Rivera 2017 SAIDIChart Contributions to SAIDI by Outage Cause 3rd Party 8.1% 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 Weather /Fire /Earthquake 46.2% Other 5.5% Operation 7.0% Equipment Failure 32.8% 3rd Party Equipment Failure Operation Other Vegetation /Animal Weather /Fire /Earthquake Vegetation /Animal 0.3% SAIDI = the cumulative amount of time the average customer is interrupted by sustained outages each year. 9

Causes of Repair Outages in Pico Rivera 2017 SAIFIChart Contributions to SAIFI by Outage Cause 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 Vegetation /Animal 0.5% Other 6.9% Weather /Fire /Earthquake 22.9% Operation 16.8% 3rd Party 17.6% Equipment Failure 35.5% 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 Pico Rivera Updated through Dec 2017

Average Reliability of 30 Circuits Serving Pico Rivera 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 Pico Rivera -- Total Customers: 36,982 182.6 1.1 1.1 111.9 1.0 1.2 135.1 0.6 1.2 132.9 0.5 0.4 25.7 0.2 0.3 17.3 0.1 0.0 6.0 0.1 0.2 181.9 0.9 1.1 3rd Party 11% 16% 24% 14% 25% 37% 64% 48% 39% 3% 14% 29% 20% 7% 52% 3% 1% - 74% 79% 17% 8% 18% 33% Equipment Failure 26% 25% 29% 37% 26% 34% 21% 23% 27% 26% 23% 39% 67% 84% 20% 42% 26% - 4% 1% 29% 33% 35% 29% Operation 6% 19% 8% 25% 37% 4% 10% 21% 2% 2% 11% 1% 2% 3% - 51% 68% 48% 17% 16% - 7% 17% 2% Other 53% 31% 21% 5% 5% 19% 2% 4% 31% 6% 10% 22% 3% 3% 29% 4% 4% 52% 2% 1% 24% 6% 7% 26% Vegetation/Animal 3% 8% 17% 2% 1% 6% 0% 0% - - - - 1% 1% - - - - 4% 2% 30% 0% 0% 6% Weather/Fire/Earthquake 0% 0% - 16% 6% - 2% 4% - 62% 41% 10% 7% 2% - - - - - - - 46% 23% 4% 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 Pico Rivera - 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 BALLARD(12KV) - Customers: 1,999 673.6 2.4 1.6 66.7 0.4 2.3 172.0 1.4 0.7 262.2 1.1 CircuitHistory - - - - 88.1 0.7 0.3 60.9 1.0-411.1 2.8 0.3 3rd Party 15% 42% 39% - - - 84% 70% - - - 1- - - - 12% 4% - 100% 100% - 17% 37% - Equipment Failure 0% 0% - 66% 11% 60% 15% 21% 100% 93% 96% - - - - 7% 2% - - - - 61% 37% - Operation 2% 15% - 34% 89% - 1% 10% - - - - - - - 81% 95% 100% - - - 17% 25% 100% Other 83% 43% 61% - - 40% - - - 7% 4% - - - - - - - - - - 4% 1% - BEXLEY(4.16KV) - Customers: 772 211.3 2.0 1.0 91.6 0.2 1.0 - - - - - 2.0 - - - - - - - - - - - 2.0 3rd Party - - 100% - - 100% - - - - - 100% - - - - - - - - - - - 100% Equipment Failure 31% 49% - 98% 45% - - - - - - - - - - - - - - - - - - - Operation 4% 2% - 2% 55% - - - - - - - - - - - - - - - - - - - Other 66% 49% - - - - - - - - - - - - - - - - - - - - - - BRONCO(12KV) - Customers: 2,454 636.7 3.6 2.6 114.9 1.6-172.5 1.0 0.9 6.0 0.0 - - - - - - - - - - 6.0 0.0-3rd Party - - - - - - 80% 91% 100% - - - - - - - - - - - - - - - Equipment Failure 1% 0% 39% 73% 96% - 0% 0% - - - - - - - - - - - - - - - - Operation 0% 10% 24% 1% 1% - 17% 5% - 100% 100% - - - - - - - - - - 100% 100% - Other 91% 62% - 18% 2% - 3% 4% - - - - - - - - - - - - - - - - Vegetation/Animal 7% 28% 37% - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 8% 1% - - - - - - - - - - - - - - - - - - - CADILLAC(12KV) - Customers: 406 374.8 2.2 1.2 0.5 0.0 0.1 31.7 0.1 2.0 172.9 1.9 1.0 317.9 0.7 0.7 - - - 20.1 0.1-510.9 2.7 1.7 3rd Party - - - - - 50% 1% 28% - - - - 99% 99% 100% - - - - - - 62% 25% 43% Equipment Failure 74% 54% 100% - - - 80% 48% - 100% 100% 100% - - - - - - 100% 100% - 38% 74% 57% Operation 2% 1% - 100% 100% - 19% 25% - - - - 1% 1% - - - - - - - 0% 0% - Other 25% 45% - - - 50% - - 100% - - - - - - - - - - - - - - - 15

Reliability Histories for Individual Circuits Serving Pico Rivera - 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 CHURCH(12KV) - Customers: 1,593 38.0 0.1-45.0 0.1 1.9 17.5 0.0 1.0 1.6 0.0 2.0 58.1 1.0 - - - - 2.7 0.0-62.5 1.0 2.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - 84% 81% 50% - - - - - 50% 100% 100% - - - - - - - 93% 97% 50% Operation 100% 100% - 16% 19% - - - - 100% 100% - - - - - - - - - - 3% 1% - Other - - - - - 50% 100% 100% 100% - - 50% - - - - - - 100% 100% - 4% 2% 50% COFFEE(4.16KV) - Customers: 644 139.8 1.0 1.0 111.8 1.0-13.0 1.0 1.0 - - - - - - 12.6 0.0 - - - 1.0 12.6 0.0 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - 100% - - 100% Equipment Failure - - - 19% 4% - - - - - - - - - - 100% 100% - - - - 100% 100% - Operation - - - - - - 100% 100% 100% - - - - - - - - - - - - - - - Other 100% 100% 100% 81% 96% - - - - - - - - - - - - - - - - - - - CORNWALL(12KV) - Customers: 1,396 226.1 0.3 0.0 53.0 0.8 0.3 268.3 1.2-4.7 0.0-36.4 0.4-138.7 0.7 - - - - 179.9 1.2-3rd Party - - - 62% 92% 100% - - - - - - - - - - - - - - - - - - Equipment Failure 99% 97% - 7% 1% - 63% 9% - - - - 90% 72% - 62% 45% - - - - 66% 54% - Operation 1% 3% - 31% 7% - 36% 89% - 100% 100% - 10% 28% - 27% 40% - - - - 25% 37% - Other - - - - - - 1% 2% - - - - - - - 12% 15% - - - - 9% 10% - Vegetation/Animal - - 100% - - 0% - - - - - - - - - - - - - - - - - - CORVETTE(12KV) - Customers: 256 62.7 1.0-187.4 1.0 0.8 - - 1.0 - - - - - - - - - - - - - - - 3rd Party - - - 100% 100% 100% - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - 100% - - - - - - - - - - - - - - - Vegetation/Animal 100% 100% - - - - - - - - - - - - - - - - - - - - - - 16

Reliability Histories for Individual Circuits Serving Pico Rivera - 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 DECOSTA(12KV) - Customers: 2,512 0.5 0.0-201.8 1.5-665.3 0.5-811.9 2.6 1.0 12.6 0.1 1.0 0.7 0.0-15.0 0.2 1.0 840.2 2.9 3.0 3rd Party - - - 48% 68% - 99% 89% - 8% 39% 100% 100% 100% 100% - - - - - - 9% 37% 66% Equipment Failure - - - 42% 20% - 0% 0% - - - - - - - - - - - - - - - - Operation 100% 100% - 11% 11% - 0% 5% - - - - - - - 100% 100% - 100% 100% - 2% 8% - Other - - - - - - 0% 6% - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - - - - - - - 100% - - 34% Weather/Fire/Earthquake - - - - - - - - - 92% 61% - - - - - - - - - - 89% 55% - DEUCE(12KV) - Customers: 1,661 - - - 7.9 0.0 1.1 0.2 0.0-1.1 0.0-39.3 0.2 2.0 6.7 0.0-5.1 0.0-52.3 0.3 2.0 3rd Party - - - 58% 95% - - - - - - - 47% 21% 50% - - - - - - 35% 12% 50% Equipment Failure - - - 42% 5% - - - - - - - 3% 1% 50% 100% 100% - - - - 15% 19% 50% Operation - - - - - - 100% 100% - 100% 100% - - - - - - - - - - 2% 5% - Other - - - - - 100% - - - - - - 29% 51% - - - - - - - 22% 30% - Vegetation/Animal - - - - - - - - - - - - 21% 27% - - - - 100% 100% - 26% 34% - DODGE(16KV) - Customers: 2,082 133.5 1.2 0.8 400.4 2.1 5.0 139.6 0.2 4.0 - - - - - - 9.3 0.1 - - - 1.0 9.3 0.1 1.0 3rd Party 24% 80% - 17% 49% 60% - - - - - - - - - - - - - - - - - - Equipment Failure 53% 8% - 3% 1% 40% 36% 49% 75% - - - - - - 100% 100% - - - - 100% 100% - Operation - - - - - - 64% 49% - - - - - - - - - - - - - - - - Other - - - - - - - - 25% - - - - - - - - - - - 100% - - 100% Vegetation/Animal 23% 12% 100% 4% 2% - 0% 2% - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 76% 48% - - - - - - - - - - - - - - - - - - - DURFEE(4.16KV) - Customers: 719 139.5 1.0-18.5 0.1 1.0 226.2 0.3 0.7 66.2 2.0 2.0 - - - 2.8 0.0 - - - - 69.0 2.0 2.0 3rd Party - - - - - - 90% 86% 100% - - 50% - - - - - - - - - - - 50% Equipment Failure - - - 100% 100% - 9% 6% - - - 50% - - - 100% 100% - - - - 4% 1% 50% Operation - - - - - 100% 1% 8% - 100% 100% - - - - - - - - - - 96% 99% - Other 100% 100% - - - - - - - - - - - - - - - - - - - - - - 17

Reliability Histories for Individual Circuits Serving Pico Rivera - 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 ESCAMILLA(12KV) - Customers: 2,548 167.8 1.7 1.0 96.5 1.1 1.0 22.3 0.0 1.0 - - - 58.7 1.0 - - - - - - - 58.7 1.0-3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 80% 87% 100% - - - 100% 100% - - - - 100% 100% - - - - - - - 100% 100% - Operation 20% 13% - 100% 100% - - - - - - - - - - - - - - - - - - - Other - - - - - - - - 100% - - - - - - - - - - - - - - - Vegetation/Animal - - - - - 100% - - - - - - - - - - - - - - - - - - GASPAR(12KV) - Customers: 409 - - - 104.4 0.3 1.0 14.8 0.1-3.3 0.3 - - - 1.0 - - - - - - 3.3 0.3 1.0 3rd Party - - - - - - - - - - - - - - 100% - - - - - - - - 100% Equipment Failure - - - 84% 74% - - - - - - - - - - - - - - - - - - - Operation - - - 16% 26% - - - - 100% 100% - - - - - - - - - - 100% 100% - Other - - - - - 100% 100% 100% - - - - - - - - - - - - - - - - JULEP(12KV) - Customers: 100 240.0 2.0 0.1 - - 1.0 8.6 0.0 - - - - - - - - - - - - - - - - 3rd Party - - - - - 100% 100% 100% - - - - - - - - - - - - - - - - Equipment Failure 42% 50% 100% - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other 58% 50% - - - - - - - - - - - - - - - - - - - - - - MAXINE(4.16KV) - Customers: 627 - - 3.0 136.9 1.6 - - - 6.8 422.0 1.0 7.0 - - 2.0 - - - - - - 422.0 1.0 9.0 3rd Party - - 67% - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - 20% 1% - - - - 100% 100% 86% - - - - - - - - - 100% 100% 67% Operation - - - 77% 97% - - - - - - - - - - - - - - - - - - - Other - - 33% - - - - - 100% - - 14% - - 100% - - - - - - - - 33% Weather/Fire/Earthquake - - - 3% 2% - - - - - - - - - - - - - - - - - - - 18

Reliability Histories for Individual Circuits Serving Pico Rivera - 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 MILLERGROVE(12KV) - Customers: 2,435 39.5 1.2 2.0 18.6 1.0 1.0 28.3 0.1 2.9 285.9 1.1 - - - - 23.3 0.1-0.1 0.0 1.0 309.3 1.2 1.0 3rd Party 8% 0% 50% 37% 98% 100% 1% 5% 34% - - - - - - - - - - - - - - - Equipment Failure 40% 9% 50% 57% 1% - 88% 46% 66% - - - - - - 100% 100% - - - 100% 8% 9% 100% Operation 25% 81% - 5% 1% - 11% 48% - 1% 4% - - - - - - - 100% 100% - 1% 4% - Other 27% 9% - - - - - - - 2% 1% - - - - - - - - - - 2% 1% - Weather/Fire/Earthquake - - - - - - - - - 96% 94% - - - - - - - - - - 89% 86% - PERKINS(12KV) - Customers: 1,578 - - - 15.3 0.0 2.0 187.3 1.5 3.0 115.6 1.0 - - - - 4.6 0.0 - - - - 120.2 1.0-3rd Party - - - 58% 66% 100% 100% 100% 100% - - - - - - - - - - - - - - - Equipment Failure - - - 42% 34% - - - - - - - - - - 51% 50% - - - - 2% 1% - Operation - - - - - - - - - 3% 2% - - - - 49% 50% - - - - 5% 3% - Other - - - - - - - - - 97% 98% - - - - - - - - - - 93% 96% - REGINA(4.16KV) - Customers: 875 99.4 2.0-121.2 1.9 0.9 4.5 0.0 1.1 - - - - - - 3.2 0.0 - - - - 3.2 0.0-3rd Party - - - - - 100% - - 88% - - - - - - - - - - - - - - - Equipment Failure 50% 49% - - - - - - - - - - - - - - - - - - - - - - Operation 50% 51% - 100% 100% - 100% 100% 12% - - - - - - 100% 100% - - - - 100% 100% - Other - - - - - - - - - - - - - - - - - - - - - - - - SANKA(4.16KV) - Customers: 552 140.4 1.0 2.0 9.4 0.1 1.8 73.3 0.9 0.8 794.2 1.0 - - - 1.0 - - - 78.1 1.0-872.3 2.0 1.0 3rd Party - - - - - - - - - - - - - - 100% - - - 100% 100% - 9% 51% 100% Equipment Failure - - - 32% 13% - - - - 100% 100% - - - - - - - - - - 91% 49% - Operation - - - 68% 87% - 6% 4% - - - - - - - - - - - - - - - - Other 100% 100% 100% - - 100% 94% 96% 100% - - - - - - - - - - - - - - - 19

Reliability Histories for Individual Circuits Serving Pico Rivera - 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 SERAPIS(4.16KV) - Customers: 630 186.4 1.0 0.9 201.8 3.4-22.3 0.1 1.0 - - 1.0 11.6 0.0-96.8 1.0 1.0 - - - 108.3 1.1 2.0 3rd Party - - - - - - - - 100% - - - - - - - - - - - - - - - Equipment Failure 100% 100% 100% - - - - - - - - - - - - 4% 1% - - - - 4% 1% - Operation - - - 100% 100% - - - - - - - 100% 100% - 96% 99% - - - - 96% 99% - Other - - - - - - 100% 100% - - - 100% - - - - - 100% - - - - - 100% STAMPER(12KV) - Customers: 983 75.2 1.0-258.6 3.0 1.0 125.6 1.0 - - - - 144.8 1.4-45.8 0.1 - - - - 190.6 1.6-3rd Party - - - 32% 33% - - - - - - - - - - - - - - - - - - - Equipment Failure 100% 100% - 34% 34% - - - - - - - 100% 100% - 5% 2% - - - - 77% 92% - Operation - - - 1% 0% 100% - - - - - - - - - 95% 98% - - - - 23% 8% - Other - - - 33% 33% - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 100% 100% - - - - - - - - - - - - - - - - STOAKES(12KV) - Customers: 230 - - - - - - 4.2 0.0 - - - - - - - - - - - - - - - - 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - 100% 100% - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - - - - - - - - STUTZ(12KV) - Customers: 2,425 33.0 0.1 2.1 42.3 0.1 1.0 106.3 1.1 - - - - - - 1.0 - - - - - - - - 1.0 3rd Party - - - - - - 90% 94% - - - - - - - - - - - - - - - - Equipment Failure 42% 17% 46% 60% 36% 100% - - - - - - - - - - - - - - - - - - Operation 27% 24% 7% 5% 20% - 10% 6% - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - 100% - - - - - - - - 100% Vegetation/Animal - - 47% 35% 44% - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 31% 59% - - - - - - - - - - - - - - - - - - - - - - 20

Reliability Histories for Individual Circuits Serving Pico Rivera - 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 SUNGLOW(4.16KV) - Customers: 838 - - 1.0 139.4 2.3 2.0 57.8 0.2 2.0 598.3 1.0 2.0 5.3 0.0 - - - - - - 1.0 603.6 1.0 3.0 3rd Party - - - - - 50% - - 100% - - - - - - - - - - - 100% - - 34% Equipment Failure - - - - - - 81% 71% - - - - - - - - - - - - - - - - Operation - - - 100% 100% - 19% 29% - - - - 100% 100% - - - - - - - 1% 4% - Other - - 100% - - 50% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - 100% 100% 100% - - - - - - - - - 99% 96% 66% TOPEKA(4.16KV) - Customers: 845 1.7 0.0 2.0 110.7 1.3 1.0 9.1 0.2 1.5 106.6 0.1 0.9 6.9 0.0 1.0 3.0 0.0 - - - - 116.5 0.1 1.9 3rd Party - - - - - 100% 100% 100% 100% - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - 100% 100% 100% 100% 100% - - - - 9% 19% 53% Operation 100% 100% - 100% 100% - - - - 1% 8% - - - - - - - - - - 1% 7% - Other - - 100% - - - - - - 99% 92% 100% - - - - - - - - - 91% 75% 47% TORPEDO(12KV) - Customers: 1,633 - - 1.0 5.6 0.0 0.9 253.4 2.1 0.8 - - - 39.8 0.1-22.8 0.1 - - - - 62.7 0.1-3rd Party - - - - - - 52% 11% 100% - - - - - - - - - - - - - - - Equipment Failure - - - 31% 20% 100% 41% 48% - - - - 1% 4% - 39% 14% - - - - 15% 8% - Operation - - - 69% 80% - 7% 41% - - - - - - - 61% 86% - - - - 22% 42% - Other - - 100% - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - - - - 99% 96% - - - - - - - 63% 50% - UNITY(4.16KV) - Customers: 317 - - - 465.7 5.6 1.6 - - - 109.4 0.6 0.6 - - - - - - - - - 109.4 0.6 0.6 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - 52% 9% - - - - 93% 25% - - - - - - - - - - 93% 25% - Operation - - - 34% 77% - - - - 7% 75% 100% - - - - - - - - - 7% 75% 100% Other - - - 13% 15% 100% - - - - - - - - - - - - - - - - - - 21

Reliability Histories for Individual Circuits Serving Pico Rivera - 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 VICKI(12KV) - Customers: 1,273 432.2 2.7 2.2 423.0 2.3 0.3 18.9 0.1 - - - - 157.7 0.3 1.0 11.1 0.0 - - - - 168.7 0.3 1.0 3rd Party 50% 21% 37% - - - - - - - - - 1% 2% 100% - - - - - - 1% 2% 100% Equipment Failure 29% 38% 25% 89% 98% 100% 27% 40% - - - - 96% 69% - 100% 100% - - - - 96% 71% - Operation 21% 41% 38% 11% 2% - 73% 60% - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - 3% 29% - - - - - - - 3% 27% - YORKTOWN(12KV) - Customers: 2,190 164.7 0.5 0.6 7.0 0.0 1.0 141.8 1.1 2.0 - - - 2.5 0.0 - - - - - - - 2.5 0.0-3rd Party 28% 71% 100% - - - - - 50% - - - - - - - - - - - - - - - Equipment Failure 65% 17% - 80% 75% 100% 97% 95% - - - - 81% 33% - - - - - - - 81% 33% - Operation 6% 8% - - - - 3% 5% - - - - - - - - - - - - - - - - Other - - - - - - - - 50% - - - - - - - - - - - - - - - Vegetation/Animal 1% 3% - - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 20% 25% - - - - - - - 19% 67% - - - - - - - 19% 67% - 22