Circuit Reliability Review

Circuit Reliability Review Los Angeles District 3 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 /Areas in Los Angeles District 3 CityList1 AGOURA HAWAIIAN GARDENS PICO RIVERA (SHARED) WHITTIER (SHARED) AGOURA HILLS HAWTHORNE RANCHO PALOS VERDES ALHAMBRA HERMOSA BEACH REDONDO BEACH ALTADENA HIDDEN HILLS ROLLING HILLS ARCADIA HUNTINGTON PARK ROLLING HILLS ESTATES ARTESIA INGLEWOOD ROSEMEAD BALDWIN PARK IRWINDALE ROSSMOOR BELL LA CANADA FLINTRIDGE SAN FERNANDO BELL GARDENS LA CRESCENTA-MONTROSE SAN GABRIEL (SHARED) BELLFLOWER LADERA HEIGHTS SAN MARINO BEVERLY HILLS LAKEWOOD SANTA MONICA BRADBURY LAS FLORES SANTA MONICA MOUNTAINS CALABASAS LATIGO CANYON SAWTELLE VA CENTER CARSON LAWNDALE SEAL BEACH CASA CONEJO LOMITA SEMINOLE HOT SPRINGS CERRITOS LONG BEACH (SHARED) SIERRA MADRE CITY OF INDUSTRY (SHARED) LOS ALAMITOS SIGNAL HILL CITY TERRACE LOS ANGELES/UNINCORPORATED (ZIPS 59, 61, 01, 02, 22, 23) SIMI VALLEY COMMERCE LYNWOOD SOUTH EL MONTE COMPTON MALIBOU LAKE SOUTH GATE CORNELL MALIBU SOUTH PASADENA CORRAL CANYON MANHATTAN BEACH SOUTH SAN GABRIEL CUDAHY MARINA DEL REY STOKES CANYON CULVER CITY MAYFLOWER VILLAGE SUNSET MESA DECKER/ENCINAL MAYWOOD SYCAMORE CANYON DOMINGUEZ HILLS/RANCHO DOMINGUEZ MONROVIA TEMPLE CITY (SHARED) DUARTE MONTE NIDO/COLD CREEK THOUSAND OAKS EAST LOS ANGELES MONTEBELLO (SHARED) TOPANGA CANYON EAST PASADENA MONTEREY PARK TORRANCE (SHARED) EAST SAN GABRIEL MOORPARK TRIUNFO CANYON EL MONTE MOUNTAIN VIEW ESTATES UNIVERSAL CITY EL SEGUNDO MULHOLLAND CORRIDOR VINCENT FRANKLIN CANYON OAK PARK WALNUT PARK GARDENA PALOS VERDES ESTATES WEST HOLLYWOOD GLENDALE PARAMOUNT WEST PUENTE VALLEY HARBOR CITY PASADENA WESTLAKE VILLAGE 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 Los Angeles District 3 CircuitList1 There are 32 circuits that serve Los Angeles District 3 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers BONNELL(4.16KV) 1 TUNA(16KV) 601 - - BUFFER(16KV) 1,062 VICASA(16KV) 2,005 - - CASTRO PEAK(2.4KV) 9 - - - CHENEY(4.16KV) 275 - - - CORNELL(4.16KV) 181 - - - CRUMNER(16KV) 1,760 - - - CUTHBERT(16KV) 2,223 - - - DE MILLE(4.16KV) 245 - - - FEDERAL(16KV) 47 - - - GALAHAD(16KV) 2,266 - - - HORIZON(16KV) 970 - - - HORNTOAD(16KV) 1,481 - - - JAWS(12KV) 40 - - - KANAN(16KV) 2,640 - - - LINDERO(16KV) 1,642 - - - MAGUIRE(16KV) 881 - - - MERLIN(16KV) 974 - - - MILO(16KV) 1,746 - - - MULHOLLAND(16KV) 538 - - - NICHOLAS(16KV) 1,939 - - - NIMITZ(16KV) 14 - - - PARADISE(16KV) 839 - - - PATTON(16KV) 5 - - - PLATEAU(16KV) 2,367 - - - PURDUE(16KV) 1,891 - - - RHODA(16KV) 879 - - - SERRA(16KV) 160 - - - SIENNA(16KV) 944 - - - SYLVIA(4.16KV) 253 - - - TRIUNFO(16KV) 511 - - - Grand Total 31,389 7

Reliability History of Circuits Serving Los Angeles District 3 (No Exclusions) BarChart 2014 2015 2016 2017 250.0 SAIDI (average minutes of sustained interruptions) 200.0 150.0 100.0 50.0 168.3 150.8 112.1 114.8 179.8 204.5 134.5 139.7 Los Angeles District 3 0.0 SAIFI (average frequency of sustained interruptions) 2.5 2.0 1.5 1.0 0.5 1.3 1.5 1.0 0.9 2.3 1.1 1.7 1.2 SCE SYSTEMWIDE 0.0 ** Exclusions are days which utilities are allowed to MAIFI (average frequency of momentary interruptions) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 1.4 1.9 1.4 1.4 3.0 1.6 2.0 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 Los Angeles District 3 2017 SAIDIChart Contributions to SAIDI by Outage Cause 3rd Party 4.3% 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 Weather /Fire /Earthquake 46.2% Other 7.6% Equipment Failure 27.3% Operation 13.0% 3rd Party Equipment Failure Operation Other Vegetation /Animal Weather /Fire /Earthquake Vegetation /Animal 1.6% SAIDI = the cumulative amount of time the average customer is interrupted by sustained outages each year. 9

Causes of Repair Outages in Los Angeles District 3 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 2.5% Other 13.2% Weather /Fire /Earthquake 22.6% Operation 15.2% 3rd Party 10.9% Equipment Failure 35.6% 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 Los Angeles District 3 Updated through Dec 2017

Average Reliability of 32 Circuits Serving Los Angeles District 3 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 32 Circuits Serving Los Angeles District 3 -- Total Customers: 31,389 168.3 1.3 1.4 150.8 1.5 1.9 179.8 2.3 3.0 82.1 0.8 0.9 15.4 0.2 0.5 23.2 0.2 0.3 83.8 0.4 0.3 204.5 1.7 2.0 3rd Party 8% 9% 10% 20% 13% 14% 12% 8% 8% 3% 4% 1% 20% 32% - - - - 4% 21% 38% 4% 11% 7% Equipment Failure 36% 39% 21% 47% 53% 37% 45% 46% 36% 37% 42% 34% 47% 42% 79% 14% 7% 41% 18% 36% 30% 27% 36% 45% Operation 28% 29% 19% 10% 10% 1% 5% 9% 1% 11% 14% - 11% 6% 1% 53% 48% 2% 4% 5% 1% 13% 15% 1% Other 9% 11% 21% 9% 16% 15% 22% 21% 33% 6% 10% 47% 1% 0% 17% 29% 42% 41% 4% 10% 6% 8% 13% 32% Vegetation/Animal 2% 3% 26% 1% 1% 28% 1% 3% 5% - - 8% 21% 19% 4% - - 12% - - 18% 2% 3% 9% Weather/Fire/Earthquake 18% 10% 4% 12% 7% 6% 15% 13% 17% 42% 31% 10% - - - 4% 3% 4% 70% 29% 7% 46% 23% 6% 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 Los Angeles District 3-1 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 BONNELL(4.16KV) - Customers: 1 744.6 2.1 1.1 16.1 1.1 1.0 - - 1.6 76.3 0.9 CircuitHistory 2.6 - - - - - 0.9 - - - 76.3 0.9 3.4 3rd Party - - - - - - - - 32% - - 1- - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - 100% 100% - - - 68% - - - - - - - - - - - - - - - Other - - - - - 100% - - - - - 67% - - - - - 100% - - - - - 75% Vegetation/Animal 3% 47% - - - - - - - - - 33% - - - - - - - - - - - 25% Weather/Fire/Earthquake 97% 53% 100% - - - - - - 100% 100% - - - - - - - - - - 100% 100% - BUFFER(16KV) - Customers: 1,062 20.1 0.1-1.2 0.0 1.0 6.2 0.0 - - - - - - - 31.4 1.0 1.0 - - - 31.4 1.0 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 99% 89% - - - - 85% 77% - - - - - - - 16% 2% - - - - 16% 2% - Operation 1% 11% - 100% 100% - 15% 23% - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - 84% 98% - - - - 84% 98% - Vegetation/Animal - - - - - 100% - - - - - - - - - - - 100% - - - - - 100% CASTRO PEAK(2.4KV) - Customers: 9 36.0 1.0-264.0 4.0 - - - 1.0 - - 0.9 260.8 1.0 - - - - 10.2 1.0 1.0 271.0 2.0 1.9 3rd Party - - - 96% 75% - - - - - - 100% - - - - - - 100% 100% 100% 4% 50% 100% Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - 100% 100% - - - - - - - 96% 50% - Other 100% 100% - 4% 25% - - - 100% - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - - CHENEY(4.16KV) - Customers: 275 80.3 2.0 1.0 9.4 0.0 1.0 37.0 0.0 2.0 220.0 1.4 2.7 - - - - - 1.0 110.5 1.0-330.5 2.4 3.7 3rd Party - - - - - - - - 50% - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - 59% 27% 24% - - - - - - - - - 39% 16% 18% Operation 67% 50% - 1% 14% - 100% 100% - - - - - - - - - - - - - - - - Other - - - 99% 86% 100% - - - - - 38% - - - - - 100% - - - - - 55% Vegetation/Animal 33% 50% - - - - - - - - - 38% - - - - - - - - - - - 28% Weather/Fire/Earthquake - - 100% - - - - - 50% 41% 73% - - - - - - - 100% 100% - 61% 84% - 15

Reliability Histories for Individual Circuits Serving Los Angeles District 3-2 of 8 CircuitHistory 2 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 CORNELL(4.16KV) - Customers: 181 43.9 1.0-115.1 1.0 - - - 1.0 18.2 2.0-84.8 1.0-18.7 1.0-87.2 2.0-208.8 6.0-3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - 11% 4% - - - - - - - - - - 100% 100% - 20% 50% - 18% 33% - Other 100% 100% - 89% 96% - - - 100% 100% 100% - - - - - - - - - - 9% 34% - Vegetation/Animal - - - - - - - - - - - - 100% 100% - - - - - - - 41% 16% - Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - 80% 50% - 33% 17% - CRUMNER(16KV) - Customers: 1,760 110.9 1.4 0.8 62.7 1.2 0.9 145.3 3.0 1.8 38.0 1.0 1.8 - - - 49.2 1.1 - - - - 87.2 2.1 1.8 3rd Party - - - - - 50% 40% 33% - - - - - - - - - - - - - - - - Equipment Failure 100% 100% 100% 72% 87% - 43% 34% 100% 24% 23% 100% - - - 0% 0% - - - - 11% 12% 100% Operation - - - 28% 13% - 9% 2% - 19% 7% - - - - 100% 100% - - - - 65% 54% - Other - - - - - 50% 8% 32% - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - 57% 70% - - - - - - - - - - 25% 34% - CUTHBERT(16KV) - Customers: 2,223 319.6 1.7 2.1 187.0 3.1 3.0 272.3 4.6 9.0 138.2 0.7 0.6 44.8 1.0-0.2 0.0 1.0 127.3 0.7 0.8 310.6 2.5 2.5 3rd Party - - - - - 33% 22% 13% 11% - - - 100% 100% - - - - - - - 14% 41% - Equipment Failure 16% 22% 47% 100% 99% 34% 28% 44% 44% 88% 92% 100% - - - - - - 100% 100% 100% 80% 57% 59% Operation 14% 11% - 0% 1% - 1% 2% - 5% 3% - 0% 0% - 100% 100% - - - - 2% 1% - Other 1% 1% - - - - 15% 18% 11% 7% 5% - - - - - - 100% - - - 3% 2% 41% Vegetation/Animal 1% 8% 48% - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 69% 58% 5% - - 33% 34% 22% 33% - - - - - - - - - - - - - - - DE MILLE(4.16KV) - Customers: 245 48.9 2.0 2.0 633.5 3.0 4.0 325.4 1.0 2.0 261.1 1.0 - - - - 0.5 0.0 - - - 1.0 261.6 1.0 1.0 3rd Party 59% 50% 50% 69% 33% 25% - - - - - - - - - - - - - - - - - - Equipment Failure - - - 14% 34% 25% - - - - - - - - - 100% 100% - - - - 0% 0% - Operation - - - 17% 33% - - - - - - - - - - - - - - - - - - - Other 41% 50% 50% - - 50% 100% 100% 100% - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - - - - - - - 100% - - 100% Weather/Fire/Earthquake - - - - - - - - - 100% 100% - - - - - - - - - - 100% 100% - 16

Reliability Histories for Individual Circuits Serving Los Angeles District 3-3 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 FEDERAL(16KV) - Customers: 47 690.5 1.9 2.1 - - - - - - - - - - - - - - - - - - - - - 3rd Party - - 48% - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal 100% 100% 52% - - - - - - - - - - - - - - - - - - - - - GALAHAD(16KV) - Customers: 2,266 695.0 7.2 5.4 253.3 2.5 2.9 574.4 8.4 5.2 42.7 1.0 0.7 22.0 0.1 1.3 49.4 0.1 0.1 65.8 1.2 1.2 179.8 2.4 3.3 3rd Party - - 17% - - - 8% 5% - - - - - - - - - - 16% 54% 51% 6% 26% 19% Equipment Failure 39% 44% 3% 43% 20% 66% 37% 33% 37% 17% 3% 65% 82% 59% 76% 4% 3% - 18% 6% - 22% 6% 44% Operation 46% 44% 76% 50% 40% 1% 5% 9% 2% 68% 95% - 18% 41% - 96% 97% 100% 6% 1% - 47% 47% 2% Other 1% 1% 0% 7% 40% 33% 40% 30% 20% - - 35% - - 24% - - - 23% 27% 25% 8% 13% 26% Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 14% 11% 4% - - - 10% 22% 42% 15% 1% - - - - - - - 36% 13% 25% 17% 7% 9% HORIZON(16KV) - Customers: 970 164.9 0.4-89.7 1.0 1.9 34.6 0.3 3.0 16.0 0.0 2.6 - - - - - - - - 1.0 16.0 0.0 3.6 3rd Party - - - - - 34% 46% 86% 33% - - - - - - - - - - - 100% - - 27% Equipment Failure - - - 93% 98% 14% - - - - - - - - - - - - - - - - - - Operation 1% 15% - 6% 1% - 8% 7% - - - - - - - - - - - - - - - - Other 71% 65% - 1% 1% - - - 67% - - 62% - - - - - - - - - - - 45% Vegetation/Animal - - - - - 52% - - - - - 38% - - - - - - - - - - - 27% Weather/Fire/Earthquake 28% 20% - - - - 46% 7% - 100% 100% - - - - - - - - - - 100% 100% - HORNTOAD(16KV) - Customers: 1,481 16.8 0.1-42.0 0.3 4.0 164.1 0.6 2.0 104.1 1.2 1.1 6.7 0.1-0.2 0.0-5.4 0.0-116.4 1.3 1.1 3rd Party - - - - - 25% 81% 81% 50% - - - - - - - - - - - - - - - Equipment Failure - - - 8% 4% 25% 19% 19% - 85% 89% - 2% 1% - 100% 100% - 100% 100% - 81% 85% - Operation - - - 10% 7% - 0% 0% - 15% 11% - 98% 99% - - - - - - - 19% 15% - Other 100% 100% - 2% 3% - - - 50% - - 100% - - - - - - - - - - - 100% Vegetation/Animal - - - 80% 87% 50% - - - - - - - - - - - - - - - - - - 17

Reliability Histories for Individual Circuits Serving Los Angeles District 3-4 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 JAWS(12KV) - Customers: 40 - - - - - - - - - - - - - - - - - - - - - - - - 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - - KANAN(16KV) - Customers: 2,640 1.1 0.0-392.0 3.1 2.5 260.9 3.3 2.2 43.2 1.1 - - - - 19.5 0.1-38.7 1.0-101.3 2.2-3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - 96% 89% 97% 98% 95% 100% 92% 95% - - - - 45% 21% - 100% 100% - 86% 92% - Operation 100% 100% - 4% 11% 3% 2% 5% - 8% 5% - - - - 34% 50% - - - - 10% 6% - Other - - - - - - - - - - - - - - - 21% 28% - - - - 4% 2% - Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - - LINDERO(16KV) - Customers: 1,642 420.3 4.0 2.1 5.4 0.0 0.2 5.2 0.1 0.0 61.7 0.4 - - - - 0.4 0.0 - - - - 62.2 0.4-3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 69% 66% 100% - - 100% 39% 28% 100% 52% 27% - - - - - - - - - - 51% 26% - Operation 31% 34% - 100% 100% - 29% 59% - 48% 73% - - - - 100% 100% - - - - 49% 74% - Other - - - - - - 32% 14% - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - - MAGUIRE(16KV) - Customers: 881 150.5 1.9 4.4 157.3 1.5 0.7 45.1 0.8 3.6 96.7 1.1 0.5 8.6 0.0-5.2 0.0-240.3 2.4 1.0 350.9 3.5 1.5 3rd Party 24% 14% - 51% 21% - 25% 7% 7% 99% 100% 48% - - - - - - 32% 57% 100% 50% 69% 84% Equipment Failure - - - 4% 3% - 35% 4% - - - - 8% 18% - 20% 11% - 24% 10% - 17% 7% - Operation 1% 0% - 2% 8% - 29% 88% 9% 1% 0% - 92% 82% - - - - 8% 5% - 8% 5% - Other 69% 85% 100% 42% 68% 53% - - 84% - - 52% - - - 80% 89% - 35% 28% - 25% 20% 16% Vegetation/Animal - - - 0% 0% 47% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 5% 1% - - - - 11% 1% - - - - - - - - - - - - - - - - 18

Reliability Histories for Individual Circuits Serving Los Angeles District 3-5 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 MERLIN(16KV) - Customers: 974 569.5 3.1 1.1 272.9 3.0 0.2 733.5 6.5 3.4 178.1 1.0 0.7 3.3 0.6 10.4 2.2 0.0 1.5 76.9 1.0 1.5 260.6 2.6 14.1 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - 52% 66% - 44% 32% 29% - - - 100% 100% 100% 79% 41% 100% - - 100% 2% 22% 95% Operation 68% 44% - 0% 0% - 0% 0% - - - - - - - 21% 59% - - - - 0% 1% - Other 32% 56% 100% 46% 33% - 46% 57% 71% - - 33% - - - - - - - - - - - 2% Vegetation/Animal - - - - - - 0% 0% - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 2% 0% 100% 9% 12% - 100% 100% 67% - - - - - - 100% 100% - 98% 78% 3% MILO(16KV) - Customers: 1,746 12.8 0.0 2.0 29.9 1.1 3.0 195.1 3.9 1.1 24.8 0.0 2.0 15.5 0.1-1.3 0.0 - - - 1.0 41.6 0.1 3.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 21% 47% - 70% 91% 33% 59% 75% 8% 100% 100% 50% 98% 96% - 77% 67% - - - - 99% 94% 33% Operation - - - 30% 9% - 7% 2% - - - - 2% 4% - 23% 33% - - - - 1% 6% - Other - - - - - - 34% 23% 92% - - 50% - - - - - - - - - - - 33% Vegetation/Animal 79% 53% 100% - - 67% - - - - - - - - - - - - - - 100% - - 34% MULHOLLAND(16KV) - Customers: 538 205.7 0.9-162.4 0.6 0.9 211.8 0.7 1.4 32.7 2.0 - - - - 168.8 1.0 0.0 - - - 201.5 3.1 0.0 3rd Party - - - 76% 24% 50% 82% 36% - - - - - - - - - - - - - - - - Equipment Failure 83% 14% - 6% 2% - 16% 63% 28% 3% 1% - - - - 1% 0% - - - - 1% 0% - Operation 0% 0% - 17% 72% - 2% 1% - 4% 2% - - - - 99% 99% 100% - - - 83% 34% 100% Other 17% 85% - - - 50% - - 72% 93% 98% - - - - 0% 1% - - - - 15% 66% - Vegetation/Animal - - - 1% 2% - 1% 1% - - - - - - - - - - - - - - - - NICHOLAS(16KV) - Customers: 1,939 357.8 1.3 0.1 227.8 1.5-168.4 2.4 6.6 149.8 1.5 2.0 2.4 0.0 0.1 2.0 0.0-1.3 0.0 0.1 155.5 1.6 2.1 3rd Party 55% 75% - - - - - - - - - 3% - - - - - - - - - - - 3% Equipment Failure 15% 9% - - - - 89% 60% 70% 71% 60% 46% 85% 80% - 100% 100% - 88% 77% - 72% 61% 43% Operation - - - 4% 7% - 11% 40% - - - - 15% 20% 100% - - - 12% 23% 100% 0% 0% 6% Other - - - 67% 80% - - - 30% 20% 34% 50% - - - - - - - - - 19% 33% 47% Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 30% 16% 100% 28% 14% - 0% 0% - 9% 6% 1% - - - - - - - - - 9% 6% 1% 19

Reliability Histories for Individual Circuits Serving Los Angeles District 3-6 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 NIMITZ(16KV) - Customers: 14 - - 2.1 - - - - - - - - - - - - - - - 428.9 0.9-428.9 0.9-3rd Party - - 47% - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - 53% - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - 100% 100% - 100% 100% - PARADISE(16KV) - Customers: 839 99.1 0.5 0.4 47.4 0.3 1.5 22.8 0.1 2.0 65.1 0.4 2.0 15.5 0.1-3.0 0.0 1.0 - - 1.0 83.7 0.4 4.0 3rd Party - - - - - - - - 52% - - - - - - - - - - - 100% - - 25% Equipment Failure 58% 11% - 83% 84% 7% 43% 23% - - - - 75% 38% - 65% 19% - - - - 16% 6% - Operation 1% 1% - 0% 1% - 27% 26% - 72% 44% - 25% 62% - - - - - - - 61% 44% - Other - - - - - 28% - - 48% - - 50% - - - - - 100% - - - - - 50% Vegetation/Animal 41% 88% - 16% 15% 66% 30% 51% - - - 50% - - - - - - - - - - - 25% Weather/Fire/Earthquake - - 100% - - - - - - 28% 56% - - - - 35% 81% - - - - 23% 51% - PATTON(16KV) - Customers: 5 - - 2.1 - - - - - - 47.4 0.6 - - - - - - - - - - 47.4 0.6-3rd Party - - 56% - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - 100% 100% - - - - - - - - - - 100% 100% - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - 44% - - - - - - - - - - - - - - - - - - - - - PLATEAU(16KV) - Customers: 2,367 45.3 0.3 1.0 311.8 3.2 2.3 46.7 0.9 2.1 88.1 1.0 1.6 0.1 0.0-10.3 0.1 0.1 33.7 0.2 0.0 132.1 1.2 1.7 3rd Party - - - 82% 68% 32% - - - - - - - - - - - - - - - - - - Equipment Failure 67% 30% - 15% 31% 63% 55% 81% - - - - - - - 67% 25% 100% - - - 5% 1% 4% Operation 9% 64% - 3% 1% 5% 16% 17% - 0% 0% - 100% 100% - 33% 75% - 87% 58% - 25% 12% - Other - - - - - - 29% 2% 4% - - 52% - - - - - - - - - - - 50% Vegetation/Animal - - 100% - - - - - 48% - - - - - - - - - - - - - - - Weather/Fire/Earthquake 24% 6% - - - - - - 48% 100% 100% 48% - - - - - - 13% 42% 100% 70% 87% 46% 20

Reliability Histories for Individual Circuits Serving Los Angeles District 3-7 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 PURDUE(16KV) - Customers: 1,891 13.2 0.0 2.0 18.9 1.0 2.0 34.0 1.0 3.0 - - - 48.1 1.0 0.0 105.1 1.1 1.0 - - - 153.2 2.1 1.0 3rd Party - - 50% - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - 2% 0% 50% - - - - - - 100% 100% - - - 100% - - - 31% 48% 100% Operation 100% 100% - 1% 0% - - - - - - - - - - 20% 6% - - - - 13% 3% - Other - - - 98% 100% - - - 67% - - - - - - 80% 94% - - - - 55% 49% - Vegetation/Animal - - 50% - - 50% 100% 100% 33% - - - - - 100% - - - - - - - - 0% RHODA(16KV) - Customers: 879 - - - 23.5 0.1-311.9 1.0 4.0 - - - 98.9 1.4 0.6 59.3 0.4-1887.6 2.0 0.0 2045.8 3.7 0.6 3rd Party - - - - - - - - 25% - - - - - - - - - - - - - - - Equipment Failure - - - 99% 97% - - - - - - - - - - 44% 50% - - - - 1% 5% - Operation - - - 1% 3% - - - - - - - - - - 56% 50% - - - - 2% 5% - Other - - - - - - - - 25% - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - 100% 100% 100% - - - - - - 5% 36% 100% Weather/Fire/Earthquake - - - - - - 100% 100% 50% - - - - - - - - - 100% 100% 100% 92% 53% 0% SERRA(16KV) - Customers: 160 313.6 0.7 2.3 46.4 0.5 1.5 64.4 0.3 3.0 149.4 1.8 1.0 37.7 1.2 1.0 - - 1.0 6.7 0.0-193.8 3.1 3.0 3rd Party 26% 27% 78% 100% 100% 100% 39% 41% 100% - - - - - - - - - - - - - - - Equipment Failure - - - - - - 22% 41% - - - - 68% 94% 100% - - - - - - 13% 37% 33% Operation 74% 73% 22% - - - 39% 17% - - - - 32% 6% - - - - 100% 100% - 10% 3% - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - 100% 100% 100% - - - - - 100% - - - 77% 60% 67% SIENNA(16KV) - Customers: 944 61.3 1.0 0.2 4.9 0.0 3.0 134.7 1.0 2.0 51.6 2.6 0.1 - - - 23.9 0.1-6.1 0.0-81.6 2.8 0.1 3rd Party - - - - - 33% - - - - - - - - - - - - - - - - - - Equipment Failure 85% 96% 100% 56% 37% - 1% 1% - 99% 100% 46% - - - 73% 75% - - - - 84% 98% 46% Operation 15% 4% - 44% 63% 1% 1% 2% - 1% 0% - - - - - - - 100% 100% - 8% 1% - Other - - - - - - - - 98% - - 54% - - - 27% 25% - - - - 8% 1% 54% Vegetation/Animal - - - - - 66% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 98% 98% 2% - - - - - - - - - - - - - - - 21

Reliability Histories for Individual Circuits Serving Los Angeles District 3-8 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 SYLVIA(4.16KV) - Customers: 253 226.0 2.0 1.0 688.5 1.0 1.0 61.4 1.9 1.0 907.9 1.0 2.0 - - - 118.3 1.0 1.8 - - - 1026.2 2.0 3.9 3rd Party - - - - - - - - 100% - - - - - - - - - - - - - - - Equipment Failure 89% 50% - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - 100% 100% - - - - - - - 3% 2% - - - - 0% 1% - Other - - - - - 100% - - - - - - - - - - - 53% - - - - - 25% Vegetation/Animal 11% 50% - - - - - - - - - 50% - - - - - - - - - - - 26% Weather/Fire/Earthquake - - 100% 100% 100% - - - - 100% 100% 50% - - - 97% 98% 47% - - - 100% 99% 49% TRIUNFO(16KV) - Customers: 511 27.2 0.3-91.4 0.8-5.1 0.0 0.3 - - - 122.3 0.5 - - - - - - - 122.3 0.5-3rd Party - - - 69% 60% - - - - - - - - - - - - - - - - - - - Equipment Failure 100% 100% - - - - - - - - - - 66% 18% - - - - - - - 66% 18% - Operation - - - - - - 100% 100% - - - - 27% 76% - - - - - - - 27% 76% - Other - - - 31% 40% - - - 100% - - - 7% 6% - - - - - - - 7% 6% - Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - - TUNA(16KV) - Customers: 601 163.3 1.2 1.9 48.9 0.2 1.5 128.3 1.1 3.3 44.7 0.1 1.0 - - - - - - - - - 44.7 0.1 1.0 3rd Party 53% 86% - 44% 28% - - - - - - - - - - - - - - - - - - - Equipment Failure 46% 8% 46% 40% 38% 2% 63% 18% 30% 100% 100% - - - - - - - - - - 100% 100% - Operation 1% 6% - 0% 0% - 17% 71% - - - - - - - - - - - - - - - - Other - - 54% 16% 33% 98% - - 70% - - 100% - - - - - - - - - - - 100% Vegetation/Animal - - - - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 19% 11% - - - - - - - - - - - - - - - - VICASA(16KV) - Customers: 2,005 25.1 0.2 2.0 222.0 1.6 3.0 89.7 0.5 1.3 194.0 1.1 0.7 2.7 0.0 1.0 3.4 0.0-1.3 0.0-201.4 1.2 1.7 3rd Party 26% 9% - - - - 11% 31% 3% - - - - - - - - - 84% 33% - 1% 0% - Equipment Failure - - - 13% 4% - 44% 14% - - - - 100% 100% - 14% 7% - 16% 67% - 2% 1% - Operation 68% 90% - 3% 2% - 16% 21% - 18% 10% - - - - 86% 93% - - - - 18% 12% - Other - - 51% 4% 5% 17% 24% 31% 78% 17% 2% 100% - - 100% - - - - - - 16% 1% 100% Vegetation/Animal 5% 1% 49% - - 66% - - 17% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 80% 89% 17% 4% 3% 3% 66% 89% - - - - - - - - - - 63% 85% - 22