Short Investigation Form

1 Short Investigation form Incident Number: E20131122-01 Date: 2/20/15 Engineer: Raymond Cho Utility: Pacific Gas and Electric (PG&E) Address: Geyser Switchyard City: Geyserville County: Sonoma Yes In File N/A Brief description: On November 22, 2013, all three transmission lines relayed at the Geyser Switchyard without interruption to customers. Six bushings on 40 year-old circuit breaker #112 were damaged. By 1009 hours, the transmission lines were placed back in service with switching procedures. My Investigation found that a bushing on the circuit breaker had catastrophically failed and damaged the other five bushings.

2 This warranted the replacement of the subject circuit breaker. I did not find a violation of CPUC rules and regulations. The Assigned Engineer has reviewed the evidence, discussed the incident with his supervisor and did not find any violations of the Commission General Orders or Public Utilities Code. Therefore, the incident is closed and no other report will be prepared at this time. Engineer Signature Supervisor Signature X Obtained and reviewed Utility s Initial and Final Reports. X Discussed the incident with the utility s representative. X Confirmed the information in the Utility s Initial and Final Reports. X Obtained and reviewed Inspection (or other applicable) Records. X Obtained and reviewed local Fire Department/CDF reports. X Other reports. Specify.