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The transmission line rights-of-way are managed to remove vegetation that has the potential to <br />interfere with the operation and maintenance of the line. The applicant would conduct vegetation <br />surveys and remove undesired vegetation that may interfere with the operation of the transmission <br />line. Typical vegetation maintenance for a 115 kV transmission line is on a three to seven year cycle <br />dependent on vegetation growth and weather events. Vegetation management generally includes a <br />combination of mechanical, hand clearing, and herbicide application to remove or control the <br />growth of vegetation in or impinging upon the right-of-way. <br />Herbicide application would be applied following U.S. Environmental Protection Agency (EPA) and <br />state agency regulations and is applied by licensed applicators. <br />Substations require a certain amount of maintenance to keep them functioning in accordance with <br />accepted operating parameters and NESC and NERC requirements. Transformers, circuit breakers, <br />batteries, protective relays, and other equipment need to be serviced periodically in accordance with <br />the manufacturer's recommendation. The site itself must be secure, kept free of vegetation, and <br />proper drainage must be maintained. <br />Environmental Assessment <br />PUC Docket E002/TL-11-223 Page 20 <br />