Circuit Reliability Review

Circuit Reliability Review Rancho Cucamonga 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 FOOTHILL District CityList1 BLOOMINGTON COLTON FONTANA GLEN AVON JURUPA VALLEY MIRA LOMA MUSCOY PEDLEY RANCHO CUCAMONGA RIVERSIDE RUBIDOUX SUNNYSLOPE 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 Rancho Cucamonga CircuitList1 There are 63 circuits that serve Rancho Cucamonga 1 Circuit Type Customers Circuit Type Customers Circuit Type Customers Circuit Type Customers ACOSTA(12KV) 1,054 GURNEY(12KV) 1,604 UNSER(12KV) 1,903 - ALSTOT(12KV) 1,545 HANKS(12KV) 630 YARBOROUGH(12K 431 - AMETHYST(12KV) 1,519 HASTY(12KV) 950 ZINSER(12KV) 1,670 - ANDRETTI(12KV) 351 HOPE(12KV) 963 - - ASHFORD(12KV) 1,246 JAYBIRD(12KV) 2,255 - - BANYAN(12KV) 1,702 KAISER(12KV) 1,192 - - BARILLA(12KV) 1,624 KENYON(12KV) 2,345 - - BEECHWOOD(12KV) 1,683 LA GRANDE(12KV) 1,629 - - BELUSHI(12KV) 1,185 MAGOO(12KV) 1,948 - - BENNY(12KV) 16 MARCONI(12KV) 2,896 - - BIANCO(12KV) 1,639 MARX(12KV) 1,426 - - BIG RIGG(12KV) 1,674 MEARS(12KV) 1,316 - - BOYNTON(12KV) 77 METRO(12KV) 2,555 - - CAGLI(12KV) 1,384 PATRON(12KV) 180 - - CALABASH(12KV) 81 PEBBLE(12KV) 2,190 - - CALVO(12KV) 1,670 PREGO(12KV) 1,307 - - CORDON(12KV) 2,443 PRYOR(12KV) 2,710 - - DANGERFIELD(12KV) 1,491 RAHAL(12KV) 1,059 - - DONOHUE(12KV) 1,334 REDWOOD(12KV) 1,371 - - DRONE(12KV) 1,969 ROSSI(12KV) 1,237 - - DYNAMICS(12KV) 161 RUTHERFORD(12KV) 44 - - EARNHARDT(12KV) 2,456 RUTTMAN(12KV) 1,775 - - FERON(12KV) 1,455 SANTORINI(12KV) 1,369 - - FIELDS(12KV) 575 SELLERS(12KV) 2,218 - - FITTIPALDI(12KV) 919 SILO(12KV) 1,486 - - FOYT(12KV) 1,329 SNEVA(12KV) 444 - - GARLITS(12KV) 1,680 STIG(12KV) 1,330 - - GREY(12KV) 1,499 STOOGES(12KV) 24 - - GRILLEY(12KV) 1,310 TERRA(12KV) 824 - - GUIDANCE(12KV) 96 TULLY(12KV) 1,055 - - Grand Total 83,503 7

Reliability History of Circuits Serving Rancho Cucamonga (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 66.2 112.1 114.8 54.5 63.0 134.5 139.7 90.0 Rancho Cucamonga 0.0 SAIFI (average frequency of sustained interruptions) 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.7 1.0 0.4 0.9 0.5 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 0.8 1.4 1.4 1.0 0.5 1.6 1.0 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 Rancho Cucamonga 2017 SAIDIChart Contributions to SAIDI by Outage Cause Vegetation /Animal 0.4% 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 18.5% Other 12.8% Operation 12.6% 3rd Party 13.8% Equipment Failure 41.9% 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 Rancho Cucamonga 2017 SAIFIChart Contributions to SAIFI by Outage Cause Vegetation /Animal 0.2% 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 11.6% Weather /Fire /Earthquake 16.3% Operation 20.9% 3rd Party 19.5% Equipment Failure 31.4% 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 Rancho Cucamonga Updated through Dec 2017

Average Reliability of 63 Circuits Serving Rancho Cucamonga 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 63 Circuits Serving Rancho Cucamonga -- Total Customers: 83,503 66.2 0.7 0.8 54.5 0.4 1.0 63.0 0.5 0.5 21.4 0.2 0.3 17.5 0.1 0.2 18.7 0.2 0.3 32.4 0.3 0.2 90.0 0.9 1.0 3rd Party 5% 11% 5% 10% 11% 7% 8% 5% 20% 27% 34% 50% 11% 28% 57% 15% 22% 20% 6% 7% - 14% 19% 35% Equipment Failure 83% 49% 13% 48% 29% 10% 72% 47% 43% 12% 10% 22% 67% 43% 14% 43% 38% 24% 47% 33% 17% 42% 31% 20% Operation 4% 7% 16% 14% 30% 0% 5% 9% 1% 23% 31% 4% 2% 7% 10% 21% 31% 27% 6% 14% 25% 13% 21% 15% Other 2% 22% 39% 8% 9% 28% 11% 6% 24% 4% 1% 8% 19% 21% 11% 7% 1% 14% 19% 21% 20% 13% 12% 12% Vegetation/Animal 2% 7% 15% 2% 7% 32% 4% 33% 11% 0% 0% 3% 2% 1% 8% 0% 0% 8% 0% 0% 14% 0% 0% 7% Weather/Fire/Earthquake 4% 4% 12% 18% 14% 23% 0% 0% - 34% 23% 13% - - - 14% 8% 7% 21% 26% 24% 19% 16% 10% 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 Rancho Cucamonga - 1 of 16 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 ACOSTA(12KV) - Customers: 1,054 116.3 0.2 1.9 49.0 1.0 0.0 263.1 1.3 1.0 31.0 0.0 CircuitHistory 0.0 31.5 0.3 - - - - 12.1 0.1-74.5 0.4 0.0 3rd Party - - - - - - - - - - - 1-100% 100% - - - - - - - 42% 72% - Equipment Failure 24% 48% - - - - 84% 76% - 95% 24% 100% - - - - - - 19% 4% - 42% 2% 100% Operation 1% 2% - 100% 100% - 3% 23% - 5% 76% - - - - - - - 2% 5% - 3% 4% - Other 8% 3% 1% - - 100% 13% 1% 100% - - - - - - - - - 79% 91% - 13% 22% - Vegetation/Animal - - 52% - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 67% 48% 47% - - - - - - - - - - - - - - - - - - - - - ALSTOT(12KV) - Customers: 1,545 17.5 0.0-13.9 0.1-14.0 0.0 - - - - - - - - - - 1.5 0.2-1.5 0.2 - Equipment Failure 100% 100% - - - - 100% 100% - - - - - - - - - - - - - - - - Operation - - - 100% 100% - - - - - - - - - - - - - 100% 100% - 100% 100% - AMETHYST(12KV) - Customers: 1,519 112.1 1.9 2.0 14.0 0.0 3.0 15.5 1.0 - - - - 90.2 0.1 1.0 41.6 0.2-9.8 0.0-141.7 0.3 1.0 Equipment Failure 81% 76% 50% - - - - - - - - - 100% 100% - 66% 54% - 100% 100% - 90% 73% - Operation - - - 83% 85% - - - - - - - - - - 29% 34% - - - - 9% 20% - Other 0% 0% - - - 33% - - - - - - - - - 5% 12% - - - - 1% 7% - Vegetation/Animal - - 50% - - 67% 100% 100% - - - - - - 100% - - - - - - - - 100% Weather/Fire/Earthquake 19% 24% 1% 17% 15% - - - - - - - - - - - - - - - - - - - ANDRETTI(12KV) - Customers: 351 - - - - - - 437.5 1.5 0.7 - - - 1.7 0.0 1.0 - - - - - - 1.7 0.0 1.0 Equipment Failure - - - - - - 79% 33% - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - 100% 100% - - - - - - - 100% 100% - Other - - - - - - 21% 67% 100% - - - - - 100% - - - - - - - - 100% 15

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 2 of 16 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 ASHFORD(12KV) - Customers: 1,246 272.8 1.0-57.4 0.1 - - - 2.0 - - - - - - 30.1 0.2 - - - - 30.1 0.2-3rd Party - - - - - - - - 100% - - - - - - - - - - - - - - - Equipment Failure 100% 100% - 100% 100% - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - 100% 100% - - - - 100% 100% - BANYAN(12KV) - Customers: 1,702 157.7 0.5 0.1 427.5 1.0 2.0 577.4 3.5 0.3 - - - 187.0 0.9 0.9 91.3 1.8 1.1 17.5 1.0 2.0 295.8 3.7 4.1 Equipment Failure 96% 82% - 100% 95% 50% 96% 76% 100% - - - 100% 100% 100% 99% 99% 100% - - - 94% 72% 51% Operation 4% 18% 100% 0% 5% - 2% 6% - - - - - - - 1% 1% - - - - 0% 0% - Other - - - - - - - - - - - - - - - - - - - - 50% - - 25% Vegetation/Animal - - - - - 50% 2% 18% - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - 100% 100% 50% 6% 27% 25% BARILLA(12KV) - Customers: 1,624 85.4 2.2 2.0 22.3 0.1-77.5 1.1 - - - - - - - - - 0.2 4.4 0.0 0.0 4.4 0.0 0.2 Equipment Failure 92% 54% - 69% 84% - 60% 10% - - - - - - - - - - 94% 58% - 94% 58% - Operation - - 50% - - - 40% 90% - - - - - - - - - 100% 6% 42% 100% 6% 42% 100% Other 8% 46% 50% - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 31% 16% - - - - - - - - - - - - - - - - - - - BEECHWOOD(12KV) - Customers: 1,683 3.9 0.0 0.1 34.8 1.1 1.0 29.3 1.1 1.0 2.0 0.0-22.6 0.0-13.0 0.1 - - - 1.0 37.6 0.2 1.0 Equipment Failure - - - 35% 4% - 17% 3% - 39% 20% - 100% 100% - 87% 50% - - - - 92% 61% - Operation 100% 100% 100% 41% 9% - 15% 3% - 61% 80% - - - - 13% 50% - - - 100% 8% 39% 100% Vegetation/Animal - - - - - 100% 68% 94% 100% - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 24% 87% - - - - - - - - - - - - - - - - - - - 16

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 3 of 16 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 BELUSHI(12KV) - Customers: 1,185 5.8 0.0 1.0 49.4 1.0-44.2 0.5 1.0 2.0 0.0 1.0 - - - 8.6 0.0 - - - - 10.7 0.0 1.0 3rd Party - - - - - - - - - - - - - - - 100% 100% - - - - 81% 92% - Equipment Failure - - - - - - 100% 100% - - - - - - - - - - - - - - - - Operation 70% 79% - 100% 100% - - - - 100% 100% 100% - - - - - - - - - 19% 8% 100% Other - - - - - - - - 100% - - - - - - - - - - - - - - - Vegetation/Animal 30% 21% 100% - - - - - - - - - - - - - - - - - - - - - BENNY(12KV) - Customers: 16 - - - - - - 32.1 0.1 - - - - 24.5 0.1 - - - - - - - 24.5 0.1 - Equipment Failure - - - - - - 100% 100% - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - 100% 100% - - - - - - - 100% 100% - BIANCO(12KV) - Customers: 1,639 25.1 1.0 1.0 54.8 0.1 0.0 - - - 7.0 0.0 - - - - - - - 1.9 0.0-8.8 0.0 - Equipment Failure 69% 2% - 64% 69% 100% - - - 100% 100% - - - - - - - - - - 79% 71% - Operation 3% 1% 100% 36% 31% - - - - - - - - - - - - - 100% 100% - 21% 29% - Other 28% 98% - - - - - - - - - - - - - - - - - - - - - - BIG RIGG(12KV) - Customers: 1,674 74.7 0.4 1.0 509.4 1.2-25.8 0.0 1.0 13.1 0.0 - - - - 17.4 1.0 1.0 48.2 0.1-78.8 1.1 1.0 3rd Party 51% 73% - - - - - - - - - - - - - 100% 100% 100% - - - 22% 88% 100% Equipment Failure 46% 25% - 8% 4% - - - - - - - - - - - - - 0% 1% - 0% 0% - Operation 1% 1% - 1% 1% - - - - - - - - - - 0% 0% - - - - 0% 0% - Other 1% 0% - 8% 4% - 100% 100% 100% 100% 100% - - - - - - - 70% 79% - 59% 11% - Weather/Fire/Earthquake 0% 0% 100% 83% 90% - - - - - - - - - - - - - 30% 20% - 18% 2% - 17

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 4 of 16 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 BOYNTON(12KV) - Customers: 77 1.1 0.0 - - - - 20.5 0.1 - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation 100% 100% - - - - 100% 100% - - - - - - - - - - - - - - - - CAGLI(12KV) - Customers: 1,384 43.9 2.0 1.0 11.3 0.1 2.0 129.0 0.3 1.9 - - - 0.6 0.0-63.8 1.1 - - - - 64.5 1.1 - Equipment Failure 81% 51% - - - - 99% 99% 100% - - - 100% 100% - 77% 12% - - - - 78% 12% - Operation 3% 0% 100% 35% 21% - - - - - - - - - - 23% 88% - - - - 22% 88% - Other 16% 49% - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - 65% 79% 100% 1% 1% - - - - - - - - - - - - - - - - CALABASH(12KV) - Customers: 81 47.3 1.0-75.0 1.0 1.0 - - 2.1 - - - - - - - - - - - - - - - 3rd Party - - - 100% 100% - - - - - - - - - - - - - - - - - - - Equipment Failure 100% 100% - - - 100% - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - 100% - - - - - - - - - - - - - - - CALVO(12KV) - Customers: 1,670 51.6 1.1 2.0 136.2 1.0-58.2 0.1 - - - - - - - 183.4 1.1 3.0 2.5 0.0-185.9 1.1 3.0 3rd Party - - - 6% 1% - - - - - - - - - - - - 33% - - - - - 33% Equipment Failure 3% 1% - 3% 0% - 99% 87% - - - - - - - - - - - - - - - - Operation 3% 4% 50% - - - - - - - - - - - - 8% 8% - - - - 8% 8% - Other - - - 91% 98% - - - - - - - - - - 22% 3% - 100% 100% - 23% 4% - Vegetation/Animal 3% 0% 50% - - - 1% 13% - - - - - - - - - 33% - - - - - 33% Weather/Fire/Earthquake 91% 95% - - - - - - - - - - - - - 69% 89% 33% - - - 68% 88% 33% 18

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 5 of 16 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 CORDON(12KV) - Customers: 2,443 35.0 0.8-37.0 0.1 1.0 20.1 1.1-12.9 0.0 - - - - 9.9 0.1 0.7 189.7 2.0-212.5 2.1 0.7 3rd Party 4% 1% - - - - - - - - - - - - - - - - - - - - - - Equipment Failure 96% 99% - 64% 32% - - - - - - - - - - 95% 75% 100% - - - 4% 2% 100% Operation - - - 26% 61% - 27% 6% - - - - - - - 5% 25% - - - - 0% 1% - Other - - - - - 100% - - - 100% 100% - - - - - - - - - - 6% 2% - Vegetation/Animal - - - - - - 73% 94% - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - 10% 7% - - - - - - - - - - - - - 100% 100% - 89% 95% - DANGERFIELD(12KV) - Customers: 1,491 11.2 0.1 - - - - 32.8 0.2 0.6 204.8 1.0 - - - - - - - - - - 204.8 1.0-3rd Party - - - - - - - - - 100% 100% - - - - - - - - - - 100% 100% - Equipment Failure 18% 2% - - - - 100% 100% 100% - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other 82% 98% - - - - - - - - - - - - - - - - - - - - - - DONOHUE(12KV) - Customers: 1,334 211.0 1.6 0.4 37.8 0.6 2.2 26.3 0.2 1.0 - - - - - - 43.7 0.1-105.6 0.7 1.3 149.2 0.8 1.3 Equipment Failure 100% 100% 100% 89% 94% 54% 6% 83% 100% - - - - - - 100% 100% - 50% 10% - 65% 19% - Operation - - - - - - - - - - - - - - - - - - 1% 4% 3% 1% 4% 3% Other - - - - - - 94% 17% - - - - - - - - - - - - - - - - Vegetation/Animal - - - 11% 6% 46% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - 48% 86% 97% 34% 77% 97% DRONE(12KV) - Customers: 1,969 23.2 1.0 2.0 9.6 0.1-22.9 0.1-62.5 1.1 2.0 - - - 3.2 0.1 0.9 18.5 0.2-84.2 1.3 2.9 3rd Party 99% 98% - - - - - - - - - 100% - - - - - - - - - - - 69% Equipment Failure - - - 100% 100% - 100% 100% - - - - - - - 100% 100% 100% - - - 4% 4% 31% Operation 1% 2% - - - - - - - 100% 100% - - - - - - - 47% 71% - 85% 92% - Other - - 50% - - - - - - - - - - - - - - - 53% 29% - 12% 4% - Weather/Fire/Earthquake - - 50% - - - - - - - - - - - - - - - - - - - - - 19

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 6 of 16 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 DYNAMICS(12KV) - Customers: 161 17.0 1.0 1.0 - - - 396.3 2.1 - - - 2.1 - - - - - - - - - - - 2.1 3rd Party 100% 100% - - - - 21% 50% - - - 100% - - - - - - - - - - - 100% Equipment Failure - - - - - - 79% 50% - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - 100% - - - - - - - - - - - - - - - - - - - - - EARNHARDT(12KV) - Customers: 2,456 - - - 36.0 0.1 - - - - - - - 111.5 1.0 0.1 - - - 38.9 1.0-150.4 2.0 0.1 Equipment Failure - - - 100% 100% - - - - - - - - - - - - - 100% 100% - 26% 50% - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - 100% 100% 100% - - - - - - 74% 50% 100% FERON(12KV) - Customers: 1,455 288.0 1.0 1.6 23.8 1.1 1.0 9.7 0.1-8.0 1.0 - - - - - - 1.0 - - - 8.0 1.0 1.0 3rd Party - - - - - - - - - 100% 100% - - - - - - - - - - 100% 100% - Equipment Failure 99% 97% 37% 45% 7% - - - - - - - - - - - - - - - - - - - Operation - - - - - - 100% 100% - - - - - - - - - 100% - - - - - 100% Other - - 63% - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal 1% 3% - 55% 93% 100% - - - - - - - - - - - - - - - - - - FIELDS(12KV) - Customers: 575 30.8 0.2-3.8 0.2 1.0 - - - - - - - - - - - - - - - - - - 3rd Party - - - - - 100% - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation 100% 100% - 100% 100% - - - - - - - - - - - - - - - - - - - 20

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 7 of 16 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 FITTIPALDI(12KV) - Customers: 919 45.7 1.0 2.0 - - 1.0 3.4 0.0 - - - - - - - 2.7 0.0 - - - - 2.7 0.0-3rd Party - - - - - - 100% 100% - - - - - - - - - - - - - - - - Equipment Failure 100% 100% 100% - - - - - - - - - - - - 100% 100% - - - - 100% 100% - Operation 0% 0% - - - - - - - - - - - - - - - - - - - - - - Other - - - - - 100% - - - - - - - - - - - - - - - - - - FOYT(12KV) - Customers: 1,329 126.5 0.3 1.0 32.8 0.7 1.3 86.5 0.1 1.7 370.7 1.4-27.0 1.0 2.0 36.7 0.8 - - - - 434.4 3.2 2.0 3rd Party - - - - - - - - 100% - - - 100% 100% 100% 100% 100% - - - - 15% 57% 100% Equipment Failure 88% 86% - - - - 100% 100% - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - - 100% 100% 25% - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - 75% - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake 12% 14% 100% - - - - - - 100% 100% - - - - - - - - - - 85% 43% - GARLITS(12KV) - Customers: 1,680 - - - 0.2 0.0-85.6 1.0-67.0 1.0 - - - - - - - 85.0 2.0-152.0 3.0-3rd Party - - - 100% 100% - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - 100% 100% - - - - - - - - - - 100% 100% - 56% 66% - Operation - - - - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - - - - - - - - 100% 100% - - - - - - - - - - 44% 34% - GREY(12KV) - Customers: 1,499 48.5 0.3-57.0 0.2 1.0 36.6 1.1 - - - - 116.1 0.8 0.3 30.5 0.1 0.0 - - - 146.6 0.9 0.3 Equipment Failure 100% 100% - 100% 100% - 67% 6% - - - - 100% 100% 100% - - - - - - 79% 94% 90% Operation - - - - - - 3% 3% - - - - - - - 100% 100% 100% - - - 21% 6% 10% Vegetation/Animal - - - - - 100% 30% 92% - - - - - - - - - - - - - - - - 21

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 8 of 16 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 GRILLEY(12KV) - Customers: 1,310 274.1 1.0 - - - 1.0 156.7 2.0-11.2 0.0 - - - - - - - - - - 11.2 0.0 - Equipment Failure 100% 100% - - - - 93% 50% - 96% 50% - - - - - - - - - - 96% 50% - Operation - - - - - - - - - 4% 50% - - - - - - - - - - 4% 50% - Vegetation/Animal - - - - - 100% 7% 50% - - - - - - - - - - - - - - - - GUIDANCE(12KV) - Customers: 96 124.0 1.0 1.0 226.2 1.1 1.0 - - 1.0 - - 2.1 - - - - - - - - - - - 2.1 3rd Party 82% 97% - - - - - - - - - 100% - - - - - - - - - - - 100% Equipment Failure 18% 3% - 100% 100% - - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other - - 100% - - - - - 100% - - - - - - - - - - - - - - - Vegetation/Animal - - - - - 100% - - - - - - - - - - - - - - - - - - GURNEY(12KV) - Customers: 1,604 0.3 0.0 1.8 172.8 1.1 1.0 - - - - - - - - - - - - - - - - - - 3rd Party - - 46% 78% 90% - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - 22% 10% - - - - - - - - - - - - - - - - - - - Other - - 54% - - 100% - - - - - - - - - - - - - - - - - - Vegetation/Animal 100% 100% - - - - - - - - - - - - - - - - - - - - - - HANKS(12KV) - Customers: 630 - - - - - - 116.1 2.0 2.0 - - 1.0 6.7 0.0 - - - - - - - 6.7 0.0 1.0 Equipment Failure - - - - - - 100% 100% 100% - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - 100% 100% - - - - - - - 100% 100% - Weather/Fire/Earthquake - - - - - - - - - - - 100% - - - - - - - - - - - 100% 22

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 9 of 16 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 HASTY(12KV) - Customers: 950 22.9 1.0 14.0 68.3 1.3 18.1 2.3 0.0 - - - - - - - - - - - - - - - - Equipment Failure 100% 100% - - - - - - - - - - - - - - - - - - - - - - Operation - - - 100% 100% - 100% 100% - - - - - - - - - - - - - - - - Other 0% 0% 71% - - 6% - - - - - - - - - - - - - - - - - - Vegetation/Animal - - 7% - - - - - - - - - - - - - - - - - - - - - Weather/Fire/Earthquake - - 21% - - 94% - - - - - - - - - - - - - - - - - - HOPE(12KV) - Customers: 963 3.3 0.0 - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation 100% 100% - - - - - - - - - - - - - - - - - - - - - - JAYBIRD(12KV) - Customers: 2,255 421.2 0.4-24.8 0.1 3.0 41.3 1.1 - - - 1.0 26.3 0.1 1.0 - - 0.6 372.9 1.1 1.0 399.1 1.2 3.6 3rd Party - - - 3% 4% - - - - - - - - - 100% - - - - - - - - 28% Equipment Failure 99% 87% - 94% 70% - 34% 4% - - - - 66% 65% - - - - 95% 90% 100% 93% 89% 28% Operation 0% 7% - 2% 25% - 14% 5% - - - - - - - - - 100% 5% 10% - 5% 9% 17% Other 1% 7% - - - 33% 14% 3% - - - 100% - - - - - - - - - - - 28% Vegetation/Animal - - - - - 67% 27% 87% - - - - 34% 35% - - - - - - - 2% 2% - Weather/Fire/Earthquake - - - - - - 12% 1% - - - - - - - - - - - - - - - - KAISER(12KV) - Customers: 1,192 - - - 20.5 1.0 1.0 133.0 0.6 1.0 - - - - - - 1.9 0.0 - - - - 1.9 0.0 - Equipment Failure - - - - - 100% 81% 79% - - - - - - - - - - - - - - - - Operation - - - 100% 100% - 19% 21% - - - - - - - 100% 100% - - - - 100% 100% - Other - - - - - - - - 100% - - - - - - - - - - - - - - - 23

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 10 of 16 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 KENYON(12KV) - Customers: 2,345 84.3 1.1 - - - 1.0 41.7 1.0 - - - - - - - - - - - - - - - - Equipment Failure 100% 100% - - - - 74% 3% - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - 100% 26% 97% - - - - - - - - - - - - - - - - LA GRANDE(12KV) - Customers: 1,629 93.1 0.5 1.5 169.0 2.1 0.1 45.4 0.3-39.4 0.6 0.5 1.4 0.0 1.0 23.3 0.1-56.3 1.0 1.0 120.3 1.8 2.5 3rd Party - - - - - - - - - 65% 95% 100% - - - - - - 10% 1% - 26% 35% 19% Equipment Failure 98% 99% 32% 67% 49% 100% 13% 5% - 35% 5% - - - - 100% 100% - - - - 31% 7% - Operation 0% 0% - 31% 51% - 82% 91% - - - - 27% 65% - - - - - - 100% 0% 1% 40% Other - - 68% 2% 0% - - - - - - - - - 100% - - - 90% 99% - 42% 57% 40% Vegetation/Animal 2% 1% - - - - 5% 4% - - - - 73% 35% - - - - - - - 1% 1% - MAGOO(12KV) - Customers: 1,948 45.6 0.2 - - - 1.0 287.9 2.1 1.0 131.3 1.2 1.0 - - - 32.1 0.1-250.6 3.1-414.0 4.4 1.0 3rd Party - - - - - - 3% 1% - - - 100% - - - - - - 32% 32% - 19% 23% 100% Equipment Failure 98% 99% - - - - 24% 49% 100% - - - - - - 46% 64% - - - - 4% 2% - Operation 2% 1% - - - - 1% 2% - 100% 100% - - - - - - - - - - 32% 27% - Other - - - - - 100% 72% 48% - - - - - - - 54% 36% - 68% 68% - 45% 49% - MARCONI(12KV) - Customers: 2,896 76.7 1.1 1.0 14.6 0.0 2.0 26.0 0.0 4.0 3.7 0.0 2.0 - - - - - - - - 0.7 3.7 0.0 2.7 3rd Party - - - - - - - - - - - 50% - - - - - - - - - - - 37% Equipment Failure 86% 60% 100% 70% 24% - 100% 100% 75% - - - - - - - - - - - - - - - Operation 7% 9% - 30% 76% - - - - 80% 89% - - - - - - - - - - 80% 89% - Other 7% 31% - - - 50% - - - - - - - - - - - - - - - - - - Vegetation/Animal - - - - - 50% - - 25% - - - - - - - - - - - 100% - - 25% Weather/Fire/Earthquake - - - - - - - - - 20% 11% 50% - - - - - - - - - 20% 11% 37% 24

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 11 of 16 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 MARX(12KV) - Customers: 1,426 - - - 3.5 0.0 - - - - - - - 1.7 0.0 - - - - - - - 1.7 0.0 - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - 100% 100% - - - - - - - 100% 100% - - - - - - - 100% 100% - MEARS(12KV) - Customers: 1,316 0.7 0.0 1.0 5.3 0.0 - - - - - - - - - - - - - - - - - - - Equipment Failure - - - 100% 100% - - - - - - - - - - - - - - - - - - - Operation 100% 100% 100% - - - - - - - - - - - - - - - - - - - - - METRO(12KV) - Customers: 2,555 0.4 0.0-47.5 0.3-1.4 0.0 1.0 22.3 0.3 1.8 3.2 0.2 1.8 72.2 1.0 1.2 - - - 97.7 1.6 4.8 3rd Party - - - - - - - - 100% - - - - - 55% - - - - - - - - 21% Equipment Failure - - - 56% 14% - 92% 50% - 100% 100% 82% - - - 20% 2% - - - - 37% 22% 31% Operation 100% 100% - 44% 86% - 8% 50% - - - - 100% 100% 45% 80% 98% 100% - - - 63% 78% 42% Vegetation/Animal - - - - - - - - - - - 18% - - - - - - - - - - - 7% PATRON(12KV) - Customers: 180 - - - 95.0 1.1 0.1 28.5 0.2 - - - - 9.0 1.0 - - - - - - - 9.0 1.0 - Equipment Failure - - - 69% 87% - 100% 100% - - - - - - - - - - - - - - - - Operation - - - 31% 13% 100% - - - - - - 100% 100% - - - - - - - 100% 100% - 25

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 12 of 16 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 PEBBLE(12KV) - Customers: 2,190 51.9 1.7 0.4 19.1 0.0 - - - - - - - 66.9 0.8 0.4 25.5 0.8 - - - - 92.4 1.6 0.4 Equipment Failure 33% 3% - 75% 50% - - - - - - - 100% 100% 100% 100% 100% - - - - 100% 100% 100% Operation 53% 38% 100% 25% 50% - - - - - - - - - - - - - - - - - - - Other 13% 59% - - - - - - - - - - - - - - - - - - - - - - PREGO(12KV) - Customers: 1,307 180.7 2.1 1.1 - - 2.0 3.3 0.0-0.2 0.0-8.5 0.0 - - - - 2.6 0.0-11.3 0.1-3rd Party - - - - - 100% - - - - - - - - - - - - - - - - - - Equipment Failure 90% 48% 1% - - - 91% 83% - - - - 97% 82% - - - - - - - 73% 46% - Operation 7% 4% 99% - - - 9% 17% - 100% 100% - 3% 18% - - - - 100% 100% - 27% 54% - Other 4% 47% - - - - - - - - - - - - - - - - - - - - - - PRYOR(12KV) - Customers: 2,710 - - - - - 1.0 - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - 100% - - - - - - - - - - - - - - - - - - Operation - - - - - - - - - - - - - - - - - - - - - - - - RAHAL(12KV) - Customers: 1,059 - - - 99.3 1.0 1.5 66.7 1.1 - - - - 17.1 0.0 - - - - - - 0.9 17.1 0.0 0.9 Equipment Failure - - - - - - 97% 99% - - - - 100% 100% - - - - - - - 100% 100% - Operation - - - - - - 3% 1% - - - - - - - - - - - - - - - - Other - - - - - - - - - - - - - - - - - - - - 100% - - 100% Weather/Fire/Earthquake - - - 100% 100% 100% - - - - - - - - - - - - - - - - - - 26

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 13 of 16 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 REDWOOD(12KV) - Customers: 1,371 120.8 2.0 3.1 30.6 0.1 2.0 - - 0.7 47.4 0.4 0.6 6.2 0.1-63.6 2.0 1.0 166.2 2.0 0.0 283.4 4.4 1.7 3rd Party 33% 44% - - - 50% - - - 100% 100% 100% - - - - - 99% - - - 17% 9% 97% Equipment Failure 67% 56% 2% - - 50% - - - - - - - - - 75% 50% 0% 66% 49% 88% 55% 45% 2% Operation - - - 100% 100% - - - - - - - - - - 25% 50% 0% 34% 51% 12% 26% 45% 1% Other - - 98% - - - - - 100% - - - 100% 100% - - - - - - - 2% 1% - ROSSI(12KV) - Customers: 1,237 68.9 3.4 3.3 0.3 0.0-3.3 0.0 - - - - - - - - - - 2.8 0.0-2.8 0.0 - Equipment Failure 4% 0% - 100% 100% - 100% 100% - - - - - - - - - - 100% 100% - 100% 100% - Operation - - - - - - - - - - - - - - - - - - - - - - - - Other 10% 30% 30% - - - - - - - - - - - - - - - - - - - - - Vegetation/Animal 86% 70% 70% - - - - - - - - - - - - - - - - - - - - - RUTHERFORD(12KV) - Customers: 44 85.5 1.0 - - - - 41.9 0.6 - - - - - - - - - - - - - - - - 3rd Party 100% 100% - - - - - - - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - 100% 100% - - - - - - - - - - - - - - - - RUTTMAN(12KV) - Customers: 1,775 - - - - - - 120.0 1.0 1.0 - - - - - - - - - - - - - - - Equipment Failure - - - - - - 100% 100% 100% - - - - - - - - - - - - - - - Operation - - - - - - 0% 0% - - - - - - - - - - - - - - - - 27

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 14 of 16 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 SANTORINI(12KV) - Customers: 1,369 53.9 1.6 0.5 36.1 0.6 0.0 16.8 0.1-28.1 0.0-0.8 0.0-29.3 0.3-4.9 0.0-63.1 0.4 - Equipment Failure 52% 4% - 71% 5% - 97% 68% - 56% 61% - - - - 100% 100% - - - - 72% 84% - Operation 35% 34% 96% 25% 93% - 3% 32% - - - - - - - - - - 40% 20% - 3% 2% - Other 13% 62% 4% 4% 2% 100% - - - 44% 39% - - - - - - - - - - 19% 4% - Vegetation/Animal - - - - - - - - - - - - 100% 100% - - - - 60% 80% - 6% 10% - SELLERS(12KV) - Customers: 2,218 - - - 2.5 0.0 - - - - 0.2 0.0 - - - - - - - - - - 0.2 0.0 - Equipment Failure - - - 74% 75% - - - - - - - - - - - - - - - - - - - Operation - - - 26% 25% - - - - 100% 100% - - - - - - - - - - 100% 100% - SILO(12KV) - Customers: 1,486 70.2 1.3 1.7 - - - 285.9 1.1 1.0 - - 2.0 - - - 95.4 1.5 1.0 - - - 95.4 1.5 3.0 3rd Party 99% 97% 41% - - - 7% 4% 100% - - 100% - - - 97% 80% - - - - 97% 80% 67% Equipment Failure - - - - - - 91% 93% - - - - - - - - - - - - - - - - Operation 1% 3% - - - - 1% 3% - - - - - - - 3% 20% - - - - 3% 20% - Other - - 59% - - - - - - - - - - - - - - 100% - - - - - 33% SNEVA(12KV) - Customers: 444 - - - 401.9 0.8 1.0 517.3 0.9 1.1 130.7 0.9 - - - - - - - - - - 130.7 0.9-3rd Party - - - 99% 99% - 99% 99% - 100% 100% - - - - - - - - - - 100% 100% - Equipment Failure - - - 1% 1% - - - - - - - - - - - - - - - - - - - Operation - - - - - - 1% 1% 100% - - - - - - - - - - - - - - - Other - - - - - 100% - - - - - - - - - - - - - - - - - - 28

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 15 of 16 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 CircuitHistory15 SAIFI MAIFI SAIDI SAIFI MAIFI STIG(12KV) - Customers: 1,330 - - - - - - - - - 20.3 0.1 1.9 - - 1.0 - - - 5.6 0.0-25.8 0.1 2.9 3rd Party - - - - - - - - - - - - - - 100% - - - - - - - - 35% Equipment Failure - - - - - - - - - 100% 100% 100% - - - - - - - - - 78% 91% 65% Operation - - - - - - - - - - - - - - - - - - 100% 100% - 22% 9% - STOOGES(12KV) - Customers: 24 - - - - - - 11.2 0.0 - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - - - - 100% 100% - - - - - - - - - - - - - - - - TERRA(12KV) - Customers: 824 107.1 1.0 2.9 49.5 1.2-110.9 1.0 1.0 - - - 57.5 0.2-32.9 0.1 1.0 - - - 90.4 0.3 1.0 Equipment Failure 100% 100% 30% 80% 16% - 100% 100% - - - - 100% 100% - 89% 50% - - - - 96% 84% - Operation - - - 20% 84% - - - - - - - - - - 11% 50% - - - - 4% 16% - Other - - 70% - - - - - 100% - - - - - - - - 100% - - - - - 100% TULLY(12KV) - Customers: 1,055 61.9 1.7 2.3 57.0 0.7 5.3 - - 3.0 3.0 0.1-37.7 0.1 0.9 19.5 0.1 1.1 - - - 60.2 0.3 2.0 3rd Party 63% 57% 44% - - - - - - 31% 92% - 100% 100% 100% - - - - - - 64% 75% 43% Equipment Failure - - - - - - - - - 34% 3% - - - - 83% 63% - - - - 28% 15% - Operation 33% 41% 13% - - - - - - - - - - - - 16% 33% - - - - 5% 7% - Other - - 44% - - 95% - - 100% - - - - - - - - 89% - - - - - 50% Vegetation/Animal 3% 2% - 100% 100% 5% - - - 36% 5% - - - - 1% 4% 11% - - - 2% 3% 6% 29

Reliability Histories for Individual Circuits Serving Rancho Cucamonga - 16 of 16 2014 2015 2016 1st Qtr 2017 2nd Qtr 2017 3rd Qtr 2017 4th Qtr 2017 2017 CircuitHistory16 SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI SAIDI SAIFI MAIFI UNSER(12KV) - Customers: 1,903 9.2 0.1-232.2 2.7 2.0 42.9 0.1-6.7 0.0-46.4 0.9 0.9 6.2 0.0-8.5 0.8-67.8 1.7 0.9 3rd Party - - - 5% 31% 50% - - - - - - 49% 90% 100% 96% 74% - - - - 42% 47% 100% Equipment Failure - - - 82% 64% - 70% 18% - 2% 7% - 42% 4% - - - - - - - 29% 2% - Operation 90% 92% - 1% 1% - 28% 76% - 98% 93% - 10% 6% - - - - 97% 100% - 28% 51% - Other 3% 3% - 11% 3% 50% - - - - - - - - - - - - - - - - - - Vegetation/Animal 6% 4% - 0% 0% - 2% 5% - - - - - - - 4% 26% - - - - 0% 0% - Weather/Fire/Earthquake - - - - - - - - - - - - - - - - - - 3% 0% - 0% 0% - YARBOROUGH(12KV) - Customers: 431 45.2 1.0 - - - - - - - 88.6 1.0 - - - - - - - - - - 88.6 1.0 - Equipment Failure 100% 100% - - - - - - - 95% 98% - - - - - - - - - - 95% 98% - Operation - - - - - - - - - 5% 2% - - - - - - - - - - 5% 2% - ZINSER(12KV) - Customers: 1,670 - - - 3.4 0.0-86.2 1.0 - - - - - - - - - - - - - - - - 3rd Party - - - - - - 100% 100% - - - - - - - - - - - - - - - - Equipment Failure - - - - - - - - - - - - - - - - - - - - - - - - Operation - - - 100% 100% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 30