Circuit Reliability Review

Circuit Reliability Review Lancaster 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 ANTELOPE VALLEY District CityList1 ACTON DESERT VIEW HIGHLANDS EDWARDS AFB FRAZIER PARK LAKE LOS ANGELES LAKE OF THE WOODS LANCASTER LEBEC LITTLEROCK PALMDALE PINE MOUNTAIN CLUB QUARTZ HILL ROSAMOND 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 Lancaster CircuitList1 There are 53 circuits that serve Lancaster 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers AIRPORT(12KV) 1,784 LUPINE(12KV) 477 - - ALFALFA(12KV) 267 MAYS(12KV) 664 - - ANAKIN(12KV) 1,544 MEDALLION(12KV) 1,226 - - ASSEMBLY(12KV) 1,278 MOONGLOW(12KV) 1,302 - - CHEWBACCA(12KV) 2,097 MUSEUM(12KV) 89 - - CROWDER(12KV) 2,516 OBAN(12KV) 2,096 - - DESERT(4.16KV) 304 PETAN(12KV) 971 - - DWEEZIL(12KV) 1,102 PHILLIPS(12KV) 1,484 - - ELM(4.16KV) 224 PRONGHORN(12KV) 879 - - ENDOR(12KV) 867 QUEENSLAND(12KV) 2,050 - - FAIRMONT(12KV) 57 SCRAPPER(12KV) 1,612 - - FARMS(12KV) 2,372 SKYWALKER(12KV) 1,894 - - FORAGE(12KV) 167 SNOWDEN(12KV) 127 - - FORCE(12KV) 2,271 STEALTH(12KV) 2,396 - - GODDE(12KV) 1,746 TARGET(12KV) 812 - - GRUBSTAKE(12KV) 388 THUNDERBOLT(12KV) 1,823 - - HAN SOLO(12KV) 1,000 TIERRA BONITA(12KV) 18 - - HANGER(12KV) 93 TOMCAT(12KV) 2,239 - - HEIGHTS(12KV) 2,501 TROPICO(12KV) 1,270 - - HUGHES LAKE(12KV) 1,196 WHIP(12KV) 1,775 - - INVENTION(12KV) 1,992 YODA(12KV) 802 - - JACKMAN(12KV) 2,668 YUCCA(4.16KV) 382 - - JEDI(12KV) 1,973 ZAPPA(12KV) 1,950 - - JOSHUA(12KV) 1,691 - - - KEEFER(12KV) 1,604 - - - KINGTREE(12KV) 2,622 - - - KONOBIE(12KV) 1,643 - - - LARIAT(12KV) 1,897 - - - LEIA(12KV) 1,614 - - - LLOYD(12KV) 984 - - - Grand Total 70,800 7

Reliability History of Circuits Serving Lancaster (No Exclusions) BarChart 2014 2015 2016 2017 SAIDI (average minutes of sustained interruptions) 160.0 140.0 120.0 100.0 80.0 60.0 40.0 20.0 39.8 112.1 114.8 78.1 84.8 134.5 139.7 67.8 Lancaster 0.0 SAIFI (average frequency of sustained interruptions) 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 1.0 0.4 0.5 0.9 1.1 0.7 0.6 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 0.7 1.4 1.4 1.1 1.6 1.6 1.5 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 Lancaster 2017 SAIDIChart Vegetation /Animal 1.2% Contributions to SAIDI by Outage Cause Weather /Fire /Earthquake 5.3% 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 Operation 21.5% Other 9.3% 3rd Party 17.3% Equipment Failure 45.3% 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 Lancaster 2017 SAIFIChart Contributions to SAIFI by Outage Cause Vegetation /Animal 4.4% Weather /Fire /Earthquake 6.5% 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 12.8% Operation 26.8% 3rd Party 22.4% Equipment Failure 27.1% 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 Lancaster Updated through Dec 2017

Average Reliability of 53 Circuits Serving Lancaster 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 53 Circuits Serving Lancaster -- Total Customers: 70,800 39.8 0.4 0.7 78.1 0.5 1.1 84.8 0.7 1.6 9.7 0.2 0.4 23.7 0.2 0.5 24.9 0.2 0.3 9.5 0.1 0.2 67.8 0.6 1.5 3rd Party 27% 34% 32% 9% 20% 14% 21% 35% 18% 6% 13% 5% 20% 26% 11% 10% 15% 14% 42% 39% 6% 17% 22% 9% Equipment Failure 38% 41% 11% 52% 36% 15% 43% 30% 12% 42% 17% 9% 39% 29% 46% 56% 39% 52% 35% 20% 3% 45% 27% 30% Operation 14% 8% 1% 20% 22% 3% 11% 18% 11% 19% 39% 0% 35% 34% 31% 12% 18% 6% 13% 14% 14% 21% 27% 14% Other 13% 9% 38% 14% 17% 41% 9% 8% 50% 3% 2% 71% 5% 3% 9% 16% 22% 16% 10% 28% 41% 9% 13% 34% Vegetation/Animal 2% 6% 11% 0% 0% 22% 11% 6% 6% 3% 6% 15% 1% 8% 3% 1% 3% 7% - - 36% 1% 4% 13% Weather/Fire/Earthquake 5% 3% 6% 4% 5% 6% 5% 4% 2% 27% 24% 0% 0% 0% - 4% 3% 5% - - - 5% 7% 1% 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 Lancaster - 1 of 14 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 AIRPORT(12KV) - Customers: 1,784 14.6 0.1 1.0 9.1 0.0 1.0 1.6 0.0 4.0 - - CircuitHistory 1.0 - - - 4.2 0.0 1.0 4.3 0.0 1.0 8.5 0.0 3.0 3rd Party - - 100% - - - 81% 53% 50% - - 1- - - - - - - - - - - - - Equipment Failure 6% 8% - 100% 100% - - - - - - - - - - 62% 38% - 100% 100% - 81% 49% - Operation 94% 92% - - - - 19% 47% - - - - - - - - - - - - - - - - Other - - - - - 100% - - 50% - - 100% - - - 38% 62% 100% - - 100% 19% 51% 100% ALFALFA(12KV) - Customers: 267 108.4 1.0 1.1 353.5 2.8 1.3 69.2 1.0 1.0 - - - 99.9 0.1-34.5 0.9 0.1 - - - 134.4 0.9 0.1 3rd Party - - - 17% 31% 7% - - - - - - - - - - - - - - - - - - Equipment Failure 86% 87% 18% 5% 8% - 100% 100% - - - - 100% 100% - 2% 0% - - - - 75% 8% - Operation - - - 4% 31% 7% - - - - - - - - - - - - - - - - - - Other - - - 75% 31% 86% - - 100% - - - - - - 98% 100% 100% - - - 25% 92% 100% Weather/Fire/Earthquake 14% 13% 82% - - - - - - - - - - - - - - - - - - - - - ANAKIN(12KV) - Customers: 1,544 175.1 1.4 2.8 - - 1.0 - - - 0.6 0.0 - - - - - - - - - - 0.6 0.0-3rd Party 100% 100% 100% - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - 100% 100% - - - - - - - - - - 100% 100% - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - 100% - - - - - - - - - - - - - - - - - - ASSEMBLY(12KV) - Customers: 1,278 2.1 0.0 1.0 7.5 0.1-15.4 0.1 - - - - - - - - - - 0.8 0.0 1.0 0.8 0.0 1.0 3rd Party - - - - - - 4% 12% - - - - - - - - - - - - - - - - Equipment Failure 100% 100% 100% 18% 13% - - - - - - - - - - - - - 90% 50% - 90% 50% - Operation - - - - - - 86% 82% - - - - - - - - - - 10% 50% - 10% 50% - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - 82% 87% - - - - - - - - - - - - - - - 100% - - 100% Weather/Fire/Earthquake - - - - - - 9% 6% - - - - - - - - - - - - - - - - 15

Reliability Histories for Individual Circuits Serving Lancaster - 2 of 14 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 CHEWBACCA(12KV) - Customers: 2,097 86.1 1.4-1.8 0.0 2.0 20.9 0.2 0.8 - - - - - - - - - 0.6 0.0-0.6 0.0-3rd Party - - - 100% 100% 50% - - - - - - - - - - - - - - - - - - Equipment Failure 98% 98% - - - - 100% 100% 100% - - - - - - - - - - - - - - - Operation 2% 2% - - - - - - - - - - - - - - - - 100% 100% - 100% 100% - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - 50% - - - - - - - - - - - - - - - - - - CROWDER(12KV) - Customers: 2,516 32.7 0.1-10.4 0.1 2.0 707.3 3.0 5.4 - - 1.0 4.3 0.0 1.0 - - - 89.2 1.1-93.5 1.1 2.0 3rd Party 30% 17% - 32% 62% - 30% 84% 45% - - - - - 100% - - - 79% 92% - 75% 90% 50% Equipment Failure 51% 47% - 6% 2% 100% 69% 15% 18% - - - 100% 100% - - - - 10% 4% - 14% 7% - Operation 18% 36% - 62% 36% - 1% 1% - - - - - - - - - - 11% 4% - 10% 4% - Other - - - - - - - - 37% - - 100% - - - - - - - - - - - 50% DESERT(4.16KV) - Customers: 304 - - 4.0 - - - 7.8 0.0 2.1 - - - - - - - - - 139.0 1.9-139.0 1.9-3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - 50% - - - 100% 100% - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - 100% 100% - 100% 100% - Other - - - - - - - - 100% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - 50% - - - - - - - - - - - - - - - - - - - - - DWEEZIL(12KV) - Customers: 1,102 68.7 0.4-20.6 0.1-24.4 0.1 - - - - - - 1.0 13.1 0.0 - - - - 13.1 0.0 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 33% 22% - 55% 34% - 100% 100% - - - - - - 100% 100% 100% - - - - 100% 100% 100% Operation 67% 78% - 45% 66% - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - - - - - - - - 16

Reliability Histories for Individual Circuits Serving Lancaster - 3 of 14 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 ELM(4.16KV) - Customers: 224 - - - 78.1 1.0-307.4 2.0 2.9 - - 1.0 - - 1.0 - - - - - - - - 2.0 3rd Party - - - 100% 100% - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - 43% 52% - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - 57% 48% 65% - - 100% - - 100% - - - - - - - - 100% Weather/Fire/Earthquake - - - - - - - - 35% - - - - - - - - - - - - - - - ENDOR(12KV) - Customers: 867 - - - - - 1.0 - - - - - - 39.8 0.2 - - - - - - - 39.8 0.2-3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - 100% 100% - - - - - - - 100% 100% - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - 100% - - - - - - - - - - - - - - - - - - FAIRMONT(12KV) - Customers: 57 6.7 0.5 2.4 334.8 1.0 6.5 632.3 6.1 2.9 - - - - - - 32.9 0.5 2.5 - - - 32.9 0.5 2.5 3rd Party - - - - - - 60% 65% 68% - - - - - - - - 39% - - - - - 39% Equipment Failure - - 82% 4% 2% - 23% 19% - - - - - - - 100% 100% 61% - - - 100% 100% 61% Operation - - - - - - 7% 8% 16% - - - - - - - - - - - - - - - Other - - - 62% 49% 92% - - - - - - - - - - - - - - - - - - Vegetation/Animal 100% 100% 18% - - - 10% 8% 16% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 34% 49% 8% - - - - - - - - - - - - - - - - - - FARMS(12KV) - Customers: 2,372 32.7 0.2 - - - 1.0 65.9 0.8 1.3 - - 1.0 0.2 0.0-2.1 0.0 - - - - 2.3 0.0 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 9% 14% - - - - 96% 95% 100% - - - 100% 100% - - - - - - - 10% 5% - Operation 91% 86% - - - - 4% 5% - - - - - - - 100% 100% - - - - 90% 95% - Other - - - - - 100% - - - - - 100% - - - - - - - - - - - 100% 17

Reliability Histories for Individual Circuits Serving Lancaster - 4 of 14 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 FORAGE(12KV) - Customers: 167 214.6 1.2 1.5 225.0 1.4 2.9 12.0 0.3-3.7 0.0 - - - 1.0 48.1 0.2-5.6 0.2 1.0 57.4 0.4 2.0 3rd Party - - - 2% 1% 37% - - - - - - - - 100% - - - 100% 100% 100% 10% 54% 100% Equipment Failure - - - 3% 0% - 13% 2% - - - - - - - 100% 100% - - - - 84% 41% - Operation 22% 16% - - - - 87% 98% - 100% 100% - - - - - - - - - - 6% 6% - Other - - - 23% 22% 63% - - - - - - - - - - - - - - - - - - Vegetation/Animal - - 66% - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 78% 84% 34% 71% 76% - - - - - - - - - - - - - - - - - - - FORCE(12KV) - Customers: 2,271 34.2 1.0 1.0 34.4 0.9 0.9 1.2 0.0 - - - - 9.7 0.1 2.0 2.5 0.0 - - - - 12.1 0.1 2.0 3rd Party 100% 100% 100% 70% 97% - 83% 84% - - - - - - - - - - - - - - - - Equipment Failure - - - 30% 3% - - - - - - - 100% 100% 50% 100% 100% - - - - 100% 100% 50% Operation - - - - - - 17% 16% - - - - - - 50% - - - - - - - - 50% Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - 100% - - - - - - - - - - - - - - - - - - GODDE(12KV) - Customers: 1,746 47.3 0.2 2.0 3.2 0.0-206.5 0.6 0.6 0.6 0.0 - - - 1.0 89.3 0.3 - - - - 89.9 0.3 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 99% 99% 51% - - - 29% 15% - - - - - - 100% 75% 58% - - - - 74% 52% 100% Operation 1% 1% - 100% 100% - 18% 14% - 100% 100% - - - - 25% 42% - - - - 26% 48% - Other - - 49% - - - 53% 71% 100% - - - - - - - - - - - - - - - GRUBSTAKE(12KV) - Customers: 388 138.3 0.8 0.9 791.9 3.8 3.9 101.1 0.4 0.4 24.9 0.1-34.0 0.1 0.4 31.8 0.4 3.6 - - - 90.7 0.6 4.0 3rd Party - - - 5% 9% - - - - - - - - - 55% 7% 2% - - - - 3% 1% 6% Equipment Failure - - - 3% 8% 8% 52% 21% 40% 71% 47% - 100% 100% - 36% 11% - - - - 69% 28% - Operation 32% 27% - 4% 2% - - - - 7% 33% - - - - 41% 85% - - - - 16% 66% - Other 60% 37% 67% 88% 81% 66% 40% 72% 60% - - - - - 45% - - - - - - - - 5% Vegetation/Animal 9% 36% 33% 0% 0% 26% 8% 8% - - - - - - - 17% 2% 100% - - - 6% 1% 90% Weather/Fire/Earthquake - - - - - - - - - 22% 21% - - - - - - - - - - 6% 3% - 18

Reliability Histories for Individual Circuits Serving Lancaster - 5 of 14 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 HAN SOLO(12KV) - Customers: 1,000 0.5 0.0-36.5 0.2 1.0 19.2 0.0 - - - - - - - - - - - - - - - - 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 100% 100% - 100% 100% - 100% 100% - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - 100% - - - - - - - - - - - - - - - - - - HANGER(12KV) - Customers: 93 256.2 1.0 8.0 51.7 0.2 2.6 23.9 0.2 1.0 88.4 0.2 - - - - - - 1.0 - - - 88.4 0.2 1.0 3rd Party 2% 1% 37% 5% 3% 23% - - 26% - - - - - - - - - - - - - - - Equipment Failure 98% 98% 25% 93% 90% - - - - 8% 21% - - - - - - - - - - 8% 21% - Operation 0% 1% - 1% 7% - 100% 100% 74% 92% 79% - - - - - - - - - - 92% 79% - Other - - 38% - - 77% - - - - - - - - - - - 100% - - - - - 100% HEIGHTS(12KV) - Customers: 2,501 34.3 0.7-3.8 0.0-28.7 0.7 - - - - - - - - - - 0.5 0.0 1.0 0.5 0.0 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 100% 100% - - - - 7% 4% - - - - - - - - - - 97% 75% - 97% 75% - Operation - - - 100% 100% - 93% 96% - - - - - - - - - - 3% 25% - 3% 25% - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - - - - - - - 100% - - 100% HUGHES LAKE(12KV) - Customers: 1,196 70.5 0.7 1.0 309.1 3.5 2.9 269.5 1.5 1.1 23.4 0.2-79.7 1.2 0.5 24.9 0.0 1.1 1.3 0.0-129.3 1.5 1.6 3rd Party - - - 19% 14% 54% 18% 63% - - - - - - - 90% 76% 30% - - - 17% 2% 21% Equipment Failure 100% 100% 1% 64% 26% 1% 0% 0% 33% 3% 1% - 59% 37% 100% 5% 16% - 100% 100% - 39% 32% 29% Operation 0% 0% - 3% 28% - 23% 10% - - - - 19% 47% - 5% 8% 37% - - - 12% 39% 26% Other - - - 2% 20% 46% 50% 13% 30% - - - 23% 16% - - - 33% - - - 14% 13% 23% Vegetation/Animal - - 99% - - - - - 18% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 14% 10% - 9% 14% 18% 97% 99% - - - - - - - - - - 17% 14% - 19

Reliability Histories for Individual Circuits Serving Lancaster - 6 of 14 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 INVENTION(12KV) - Customers: 1,992 27.7 0.6 0.5 31.1 1.1-48.7 1.0 1.0 13.8 0.2 0.0 3.5 0.0 1.0 6.9 0.0 - - - 1.0 24.3 0.2 2.0 3rd Party - - - - - - - - 100% - - - - - - - - - - - - - - - Equipment Failure - - - 60% 94% - 84% 96% - - - - - - 100% 30% 10% - - - - 8% 1% 49% Operation 26% 8% - 40% 6% - 16% 4% - 100% 100% 100% 100% 100% - 70% 90% - - - - 92% 99% 2% Other - - - - - - - - - - - - - - - - - - - - 100% - - 49% Vegetation/Animal 74% 92% 100% - - - - - - - - - - - - - - - - - - - - - JACKMAN(12KV) - Customers: 2,668 4.3 0.0-9.6 0.1-98.6 0.8 5.1 - - 1.0 13.6 0.0-56.9 0.7 2.3 - - - 70.5 0.7 3.3 3rd Party - - - - - - - - - - - - - - - 97% 98% 14% - - - 79% 94% 10% Equipment Failure - - - 94% 72% - 7% 3% - - - - 100% 100% - - - 86% - - - 19% 3% 60% Operation 100% 100% - 6% 28% - 93% 97% 61% - - - - - - - - - - - - - - - Other - - - - - - - - 39% - - 100% - - - 3% 2% - - - - 2% 2% 30% JEDI(12KV) - Customers: 1,973 85.4 2.0 1.0 470.8 0.9 1.5 75.3 1.3 0.2 - - - - - - 245.3 0.9 1.5 - - - 245.3 0.9 1.5 3rd Party 60% 50% - - - - 82% 94% 100% - - - - - - - - - - - - - - - Equipment Failure 40% 50% - 100% 98% 100% 18% 6% - - - - - - - 100% 96% 100% - - - 100% 96% 100% Operation - - - 0% 2% - - - - - - - - - - 0% 4% - - - - 0% 4% - Other - - 100% - - - - - - - - - - - - - - - - - - - - - JOSHUA(12KV) - Customers: 1,691 - - - 169.2 1.0 0.3 282.8 1.7 3.7 109.0 1.4 1.0 28.4 0.7 0.3 30.5 0.1-0.6 0.0-168.5 2.1 1.3 3rd Party - - - - - - - - - - - - 98% 99% 100% - - - - - - 16% 31% 25% Equipment Failure - - - 2% 1% - 50% 42% 9% 15% 2% - - - - 53% 65% - 100% 100% - 20% 4% - Operation - - - 98% 99% 100% - - 9% - - - - - - - - - - - - - - - Other - - - - - - - - 54% - - 100% - - - - - - - - - - - 75% Weather/Fire/Earthquake - - - - - - 50% 58% 28% 85% 98% - 2% 1% - 47% 35% - - - - 64% 65% - 20

Reliability Histories for Individual Circuits Serving Lancaster - 7 of 14 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 KEEFER(12KV) - Customers: 1,604 - - - 2.9 0.0-7.4 0.0-2.2 0.4 3.0 38.7 0.0 1.0 - - - - - - 40.9 0.4 4.0 3rd Party - - - - - - 92% 86% - - - - 100% 100% - - - - - - - 95% 10% - Equipment Failure - - - - - - - - - - - - - - 100% - - - - - - - - 25% Operation - - - - - - 8% 14% - - - - - - - - - - - - - - - - Other - - - 100% 100% - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - 100% 100% 100% - - - - - - - - - 5% 90% 75% KINGTREE(12KV) - Customers: 2,622 51.8 1.0-4.8 0.0-183.9 0.4 3.6 18.2 1.0 0.9 - - 0.9 3.4 0.0 - - - - 21.6 1.0 1.9 3rd Party 73% 95% - 37% 56% - - - - - - - - - - - - - - - - - - - Equipment Failure 19% 1% - - - - 5% 5% - - - - - - - 100% 100% - - - - 16% 1% - Operation 4% 1% - 63% 44% - 0% 1% - 94% 99% - - - 100% - - - - - - 80% 98% 50% Other 3% 2% - - - - - - 55% 6% 1% 100% - - - - - - - - - 5% 1% 50% Vegetation/Animal - - - - - - 95% 94% 45% - - - - - - - - - - - - - - - KONOBIE(12KV) - Customers: 1,643 13.0 0.1 2.0 14.8 0.0 1.0 0.5 0.0 1.0 105.8 0.7 0.3 - - - 0.3 0.0-24.1 0.7 0.3 130.2 1.5 0.6 3rd Party - - - - - - - - - - - - - - - - - - 4% 4% 9% 1% 2% 5% Equipment Failure 16% 20% - 11% 18% - - - - 100% 100% 100% - - - 100% 100% - 96% 96% 91% 99% 98% 95% Operation 60% 63% - - - - - - - - - - - - - - - - - - - - - - Other - - 50% - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - 100% 100% 100% 100% - - - - - - - - - - - - - - - Weather/Fire/Earthquake 24% 17% 50% 89% 82% - - - - - - - - - - - - - - - - - - - LARIAT(12KV) - Customers: 1,897 - - - 3.4 0.0-0.7 0.0 - - - - 11.5 0.0 1.0 - - - - - - 11.5 0.0 1.0 3rd Party - - - - - - - - - - - - 93% 92% - - - - - - - 93% 92% - Equipment Failure - - - 98% 92% - 100% 100% - - - - 7% 8% 100% - - - - - - 7% 8% 100% Operation - - - 2% 8% - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - - - - - - - - 21

Reliability Histories for Individual Circuits Serving Lancaster - 8 of 14 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 LEIA(12KV) - Customers: 1,614 8.4 0.1 1.0 0.2 0.0 1.0 14.6 0.1 3.7 - - - 13.0 0.1 - - - - 15.3 0.0-28.3 0.2-3rd Party - - - - - - 11% 6% 75% - - - - - - - - - - - - - - - Equipment Failure - - - - - - 78% 50% 25% - - - 26% 35% - - - - 100% 100% - 66% 53% - Operation 58% 51% - 100% 100% - 1% 6% - - - - 74% 65% - - - - - - - 34% 47% - Other 42% 49% - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - 100% - - 100% 11% 39% - - - - - - - - - - - - - - - - LLOYD(12KV) - Customers: 984 145.8 1.9 2.3 854.8 4.0 2.6 101.4 0.6 0.0 - - - 75.0 1.1 2.3 153.5 1.6 0.3 0.3 0.0-228.8 2.7 2.7 3rd Party 0% 0% 30% - - - 33% 49% - - - - - - - - - - - - - - - - Equipment Failure 92% 63% 27% 6% 33% - 63% 49% 100% - - - - - - 44% 62% - 100% 100% - 30% 37% - Operation 1% 1% - 67% 33% - 1% 1% - - - - - - - 42% 18% - - - - 28% 11% - Other 2% 0% - 27% 34% 88% 3% 1% - - - - 81% 8% 57% - - 100% - - - 27% 3% 62% Vegetation/Animal 6% 36% 43% - - 12% - - - - - - 19% 92% 43% 14% 20% - - - - 15% 49% 38% LUPINE(12KV) - Customers: 477 5.8 0.0 1.0 - - - 40.8 0.1-70.5 1.0 1.0 1.5 0.0 - - - - - - - 71.9 1.0 1.0 3rd Party 100% 100% 100% - - - - - - 100% 100% 100% - - - - - - - - - 98% 98% 100% Equipment Failure - - - - - - 100% 100% - - - - 100% 100% - - - - - - - 2% 2% - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - - - - - - - - MAYS(12KV) - Customers: 664 - - - - - - 29.2 0.1 2.0 - - - - - 1.0 - - 1.0 - - - - - 2.0 3rd Party - - - - - - 100% 100% - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - 100% - - - - - 50% Operation - - - - - - - - - - - - - - 100% - - - - - - - - 50% Other - - - - - - - - 100% - - - - - - - - - - - - - - - 22

Reliability Histories for Individual Circuits Serving Lancaster - 9 of 14 CircuitHistory 9 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 MEDALLION(12KV) - Customers: 1,226 12.6 0.0 1.0 26.8 1.0 1.0 181.2 2.0 2.0 18.4 0.1 2.8 - - - - - - 0.0 0.0-18.5 0.1 2.8 3rd Party - - - - - - 72% 50% - - - - - - - - - - - - - - - - Equipment Failure - - - - - 100% 28% 50% - 100% 100% 66% - - - - - - - - - 100% 94% 66% Operation 100% 100% - 100% 100% - 0% 0% - - - - - - - - - - 100% 100% - 0% 6% - Other - - 100% - - - - - 100% - - 34% - - - - - - - - - - - 34% MOONGLOW(12KV) - Customers: 1,302 2.9 0.0 1.0 33.5 0.7 1.7 160.6 2.2 4.5 - - - - - 1.0 - - - 76.4 0.7 0.4 76.4 0.7 1.4 3rd Party - - 100% 2% 1% 61% - - 22% - - - - - - - - - 100% 100% 100% 100% 100% 26% Equipment Failure 63% 74% - 10% 6% - 13% 7% 34% - - - - - 100% - - - - - - - - 74% Operation 37% 26% - 88% 93% 39% 1% 1% - - - - - - - - - - - - - - - - Other - - - - - - 38% 46% 44% - - - - - - - - - - - - - - - Vegetation/Animal - - - 1% 1% - 19% 44% - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - 29% 2% - - - - - - - - - - - - - - - - MUSEUM(12KV) - Customers: 89 - - 1.0 194.7 1.0 4.7 165.1 0.7 2.9 - - - 45.8 0.3 0.3 - - 1.3 - - - 45.8 0.3 1.6 3rd Party - - - 1% 1% 6% 21% 14% 100% - - - 100% 100% 100% - - 22% - - - 100% 100% 35% Equipment Failure - - 100% - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - 50% 41% - - - - - - - - - - - - - - - - Other - - - - - 42% 19% 40% - - - - - - - - - 78% - - - - - 65% Vegetation/Animal - - - - - - 10% 5% - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 99% 99% 52% - - - - - - - - - - - - - - - - - - OBAN(12KV) - Customers: 2,096 17.6 0.4 1.3 502.4 0.8 2.3 25.6 1.0 3.0 7.6 0.1-284.1 1.7 0.3 0.1 0.0-4.1 0.3 0.4 295.9 2.0 0.7 3rd Party - - - 0% 0% - 16% 0% - - - - - - - - - - - - - - - - Equipment Failure 92% 97% - 100% 100% 12% 1% 0% - - - - 27% 50% - 100% 100% - - - - 26% 42% - Operation 8% 3% - - - - 73% 99% 33% - - - 73% 50% 100% - - - 100% 100% - 72% 55% 45% Other - - 76% - - 44% - - 67% 100% 100% - - - - - - - - - 100% 3% 3% 55% Vegetation/Animal - - 24% - - 44% 10% 1% - - - - - - - - - - - - - - - - 23

Reliability Histories for Individual Circuits Serving Lancaster - 10 of 14 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 CircuitHistory10 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 PETAN(12KV) - Customers: 971 58.7 0.3 3.7 1.9 0.0 3.9 139.5 1.2 2.0 9.4 0.9 1.0 416.7 2.2 0.4 8.9 0.3 1.0 88.3 0.3-523.3 3.8 2.4 3rd Party - - 54% - - - 2% 0% 52% 100% 100% 100% - - - - - 100% - - - 2% 24% 82% Equipment Failure - - - - - - 53% 15% - - - - 70% 43% 100% - - - 100% 100% - 73% 34% 18% Operation 100% 100% 19% 7% 8% - 45% 85% - - - - 30% 57% - 100% 100% - - - - 25% 42% - Other - - 27% - - 100% - - 48% - - - - - - - - - - - - - - - Vegetation/Animal - - - 93% 92% - - - - - - - - - - - - - - - - - - - PHILLIPS(12KV) - Customers: 1,484 146.2 1.0 3.9 173.9 1.0 5.9 81.6 0.2 3.9 - - - - - 1.0 43.9 0.1 2.0 - - 1.0 43.9 0.1 4.0 3rd Party - - - 1% 3% - 3% 18% - - - - - - - - - - - - - - - - Equipment Failure 2% 1% - 10% 3% - - - - - - - - - - 86% 77% 100% - - - 86% 77% 51% Operation - - - - - - 0% 5% - - - - - - 100% 14% 23% - - - - 14% 23% 25% Other 98% 99% 100% 89% 95% 67% - - 78% - - - - - - - - - - - 100% - - 24% Vegetation/Animal - - - - - - 97% 77% 22% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - 33% - - - - - - - - - - - - - - - - - - PRONGHORN(12KV) - Customers: 879 245.3 2.6 2.5 116.1 1.0 7.8 187.6 2.8 6.4 1.9 0.0 0.8 111.3 0.9-15.6 0.9 2.0 2.2 0.0-130.9 1.8 2.8 3rd Party 30% 33% - 1% 1% 13% 67% 60% - - - - 94% 99% - - - 50% - - - 80% 48% 35% Equipment Failure 23% 33% - 1% 0% - 12% 1% - 18% 3% - 6% 1% - 23% 1% - 70% 88% - 9% 2% - Operation - - 0% - - - 1% 3% 8% 49% 89% - - - - 77% 99% - 30% 13% - 10% 50% - Other - - 66% 0% 0% 75% 19% 36% 92% 33% 8% 100% - - - - - 50% - - - 0% 0% 65% Vegetation/Animal 0% 0% - 0% 0% 13% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 47% 33% 34% 98% 98% - - - - - - - - - - - - - - - - - - - QUEENSLAND(12KV) - Customers: 2,050 0.2 0.0-71.8 1.1-31.8 1.0 3.0 7.5 0.5-3.3 0.1 1.0 1.4 0.0-5.9 0.0-18.1 0.6 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 100% 100% - 59% 94% - 100% 100% 33% - - - 36% 3% - 100% 100% - - - - 14% 1% - Operation - - - 41% 6% - 0% 0% - 100% 100% - 64% 98% 100% - - - 100% 100% - 86% 99% 100% Other - - - - - - - - 67% - - - - - - - - - - - - - - - 24

Reliability Histories for Individual Circuits Serving Lancaster - 11 of 14 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 CircuitHistory11 SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SCRAPPER(12KV) - Customers: 1,612 - - - 2.6 0.0-14.0 0.1 - - - 1.0 - - 1.0 - - - - - - - - 2.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - 71% 48% - - - - - - 100% - - - - - - - - 50% Operation - - - 100% 100% - 29% 52% - - - - - - - - - - - - - - - - Other - - - - - - - - - - - 100% - - - - - - - - - - - 50% SKYWALKER(12KV) - Customers: 1,894 10.9 0.1-2.6 0.0 1.0 - - - 9.2 0.0 1.0 - - - 21.9 0.1 - - - - 31.0 0.1 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation 100% 100% - 100% 100% - - - - 100% 100% - - - - 100% 100% - - - - 100% 100% - Other - - - - - - - - - - - 100% - - - - - - - - - - - 100% Vegetation/Animal - - - - - 100% - - - - - - - - - - - - - - - - - - SNOWDEN(12KV) - Customers: 127 119.1 1.1 1.0 125.6 1.8 1.0 48.1 0.1 2.1 - - - 12.1 0.4 1.0 89.4 1.0 - - - - 101.5 1.4 1.0 3rd Party - - - 89% 99% 4% - - 100% - - - - - - - - - - - - - - - Equipment Failure 99% 99% 100% - - - 29% 43% - - - - - - - 89% 94% - - - - 79% 67% - Operation 1% 1% - - - 1% 71% 57% - - - - 100% 100% - - - - - - - 12% 29% - Other - - - 1% 1% - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - 4% 0% - - - - - - - - - 100% - - - - - - - - 100% Weather/Fire/Earthquake - - - 6% 0% 96% - - - - - - - - - 11% 6% - - - - 9% 4% - STEALTH(12KV) - Customers: 2,396 5.9 0.0 0.0 29.1 0.4 1.0 0.9 0.0-0.2 0.0 - - - - 112.2 1.0-8.0 1.0-120.4 2.0-3rd Party - - - 65% 88% 100% - - - - - - - - - 0% 0% - - - - 0% 0% - Equipment Failure - - - 34% 11% - - - - 100% 100% - - - - 1% 0% - - - - 1% 0% - Operation - - 100% 1% 2% - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - 99% 100% - 100% 100% - 99% 100% - Vegetation/Animal 100% 100% - - - - 100% 100% - - - - - - - - - - - - - - - - 25

Reliability Histories for Individual Circuits Serving Lancaster - 12 of 14 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 CircuitHistory12 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI TARGET(12KV) - Customers: 812 151.9 1.1 0.6 196.1 2.1 1.0 210.2 3.3 3.0 - - 1.0 58.2 0.5 1.7 151.4 0.6 1.5 - - 1.0 209.6 1.1 5.1 3rd Party - - - 64% 48% - 99% 100% 33% - - - 63% 72% 42% - - - - - - 17% 34% 14% Equipment Failure 8% 2% - 23% 3% - - - - - - - 32% 14% - 66% 35% - - - - 56% 25% - Operation 8% 7% - - - - 1% 0% - - - - 5% 14% - - - - - - - 1% 6% - Other 84% 91% 100% 13% 49% 100% - - 67% - - 100% - - 58% - - - - - 100% - - 58% Weather/Fire/Earthquake - - - - - - - - - - - - - - - 34% 65% 100% - - - 25% 34% 28% THUNDERBOLT(12KV) - Customers: 1,823 116.9 0.7 1.5 2.0 0.0 1.0 - - - - - 1.0 42.4 0.5 - - - - - - - 42.4 0.5 1.0 3rd Party 63% 66% 100% 93% 98% 100% - - - - - - 98% 100% - - - - - - - 98% 100% - Equipment Failure 26% 25% - - - - - - - - - - 2% 0% - - - - - - - 2% 0% - Operation 11% 8% - 7% 2% - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - 100% - - - - - - - - - - - 100% TIERRA BONITA(12KV) - Customers: 18 33.0 1.0 3.0 197.0 0.4 1.2 298.1 1.1 3.0 - - 4.0 - - 1.0 - - 1.0 - - - - - 6.0 3rd Party - - - - - - 45% 15% 34% - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - 100% - - - - - - - - 17% Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - 100% - - 100% 55% 85% 66% - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - - - - 100% - - - - - 17% Weather/Fire/Earthquake 100% 100% - 100% 100% - - - - - - 100% - - - - - - - - - - - 67% TOMCAT(12KV) - Customers: 2,239 9.1 0.1-69.4 0.9 - - - - 5.2 0.0 - - - - - - - 0.0 0.0 2.0 5.2 0.0 2.0 3rd Party - - - 88% 95% - - - - - - - - - - - - - - - - - - - Equipment Failure 55% 36% - - - - - - - - - - - - - - - - - - - - - - Operation 45% 64% - 12% 5% - - - - 100% 100% - - - - - - - 100% 100% 50% 100% 100% 50% Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - - - - - - - - - - - - - - - - 50% - - 50% 26

Reliability Histories for Individual Circuits Serving Lancaster - 13 of 14 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 CircuitHistory13 SAIFI MAIFI SAIDI SAIFI MAIFI TROPICO(12KV) - Customers: 1,270 11.8 0.1-120.3 1.0 2.2 9.9 0.1 2.0 - - - 0.7 0.0 1.0 - - - - - - 0.7 0.0 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - 92% 96% 55% 100% 100% - - - - 100% 100% - - - - - - - 100% 100% - Operation 100% 100% - 8% 4% - - - - - - - - - 100% - - - - - - - - 100% Other - - - - - 45% - - 100% - - - - - - - - - - - - - - - WHIP(12KV) - Customers: 1,775 0.2 0.0-10.1 0.1 0.7 72.4 1.0 1.0 28.6 0.3 - - - 1.0 6.7 0.0 - - - - 35.3 0.3 1.0 3rd Party - - - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - 52% 66% - 100% 100% - 100% 100% - - - 100% 100% 100% - - - - 100% 100% 100% Operation - - - 48% 34% 100% - - 100% - - - - - - - - - - - - - - - Other 100% 100% - - - - - - - - - - - - - - - - - - - - - - YODA(12KV) - Customers: 802 - - - 0.3 0.0 2.0 - - 1.0 26.4 0.1 - - - - 88.7 1.1 - - - - 115.1 1.2-3rd Party - - - - - - - - 100% - - - - - - - - - - - - - - - Equipment Failure - - - 100% 100% - - - - 11% 36% - - - - 85% 90% - - - - 68% 85% - Operation - - - - - - - - - - - - - - - 15% 10% - - - - 12% 9% - Other - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - 50% - - - 89% 64% - - - - - - - - - - 20% 6% - Weather/Fire/Earthquake - - - - - 50% - - - - - - - - - - - - - - - - - - YUCCA(4.16KV) - Customers: 382 - - - 181.2 1.0-11.9 1.0 3.0 - - 1.0 4.4 0.0 2.0 - - - - - 1.0 4.4 0.0 4.0 3rd Party - - - - - - - - - - - - - - - - - - - - 100% - - 25% Equipment Failure - - - 100% 100% - - - - - - - 100% 100% - - - - - - - 100% 100% - Operation - - - - - - 100% 100% - - - - - - - - - - - - - - - - Other - - - - - - - - 100% - - 100% - - 100% - - - - - - - - 75% 27

Reliability Histories for Individual Circuits Serving Lancaster - 14 of 14 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 CircuitHistory14 SAIFI MAIFI SAIDI SAIFI MAIFI ZAPPA(12KV) - Customers: 1,950 0.4 0.0-14.1 0.0 1.0 21.3 0.1 1.0 - - - 14.0 0.1-17.7 0.1 0.5 49.7 0.1-81.5 0.3 0.5 3rd Party - - - 19% 16% - - - - - - - - - - - - - - - - - - - Equipment Failure 100% 100% - 65% 42% - 62% 29% - - - - 95% 80% - 65% 62% - 49% 46% - 60% 61% - Operation - - - 17% 42% - 38% 71% - - - - 5% 20% - 35% 38% 100% 2% 11% - 10% 22% 100% Other - - - - - 100% - - 100% - - - - - - - - - 49% 43% - 30% 17% - 28