1707 SCENIC DR SNO CO PUD 2020-03-10

SEPA ENVIRONMENTAL CHECKLIST FOR Beverly Park Switching Station Expansion AGENCY P.U.D. NO. 1 of Snohomish County USE 6. Energy and Natural Resources a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. • The facility will use electricity for the control systems and to operatethe equipment. The power will be supplied from an internal source. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. • The project will not affect the potential use of solar energy by adjacent properties. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: • Low loss electrical equipment will be specified for the switching station. The conservation features that will be utilized for the facility include a high efficiency system for the control facility and equipment. 7. Environmental Health a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste that could occur as a result of this proposal? If so, describe. • • There is a present and future potential electrical hazard if someone were to gain access to the switching station by breaching the security fence. The security fence is designed and intended to discourage or prevent such occurrences and will comply with the requirements of the National Electrical Safety Code (NESC) ANSI C2 and WAC chapter 296-45. • No chemicals will be stored on the site. The two transformers will contain mineral oil insulating fluid. Mineral insulating oil poses a low potential for toxicity, and is similar to mineral oil used for food packaging and processing (CFR 178.3620). An oil containment system will be installed to contain oil in the event of an accidental release. • The site currently includes switches containing sulfur hexafluoride gas which is utilized in sealed equipment, and is not released during routine maintenance and operations. Sulfur hexafluoride gas has low toxicity, readily mixes with air and is used in limited quantities. • The control enclosure will contain storage for batteries, used for system control and data communication. These typically contain lead and sulfuric acid and will be installed in accord with the Uniform Fire Code. X45^