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Cascade Energy Storage, LLC Battery Storage Project Hazardous Waste Small quantities of hazardous wastes would most likely be generated over the course of construction. These wastes may include waste paint, spent construction solvents, waste cleaners, waste oil, oily rags, waste batteries, and spent welding materials. Workers would be trained to properly identify and handle all hazardous wastes. Hazardous waste would be either recycled or disposed of at a permitted and licensed treatment and/or disposal facility. All hazardous waste shipped off site for recycling or disposal would be transported by a licensed hazardous waste hauler. 1.5.3 Installation,Testing and Commissioning The proposed installation of the BESS will be carefully thought out and will be depicted in the site plans. Once installed, the BESS will be thoroughly tested and commissioned as follows: • A test and verification that all monitoring and protection equipment is functioning • A weeklong inspection of the battery operations to look for indications of overheating,abnormal noise, or malfunction • Infrared scanning of the battery building to determine excessive heat 1.5.4 Operations and Maintenance Activities Typical operations and maintenance (O&M) activities that would occur on the project site during operation include,but are not limited to, local and remote monitoring and operations;administration and reporting; semi-annual and annual services; site security and management; repair and maintenance of BESS, electrical transmission lines, and other project equipment. The batteries, electrical equipment, heating, ventilation, air conditioning, fire protection systems, and security would be automated and monitored remotely, including but not limited to the evaluating the following: • State of Charge (SOC) • Temperatures in battery building • Over-voltage and under-voltage against over-charging and over-discharging • Smoke Detection • Automatic battery module isolation • Alarms and fault monitoring The performance of lithium-ion battery cells is dependent on both temperature and operating voltage. There is a safe operating window in which the battery cells operate within. This window is a function of cell voltage and temperature and why the monitoring and evaluation of conditions is so important. The Battery Storage Site would be unoccupied but visited periodically through the year for equipment inspections, monitoring and testing, and maintenance as needed. Periodically, batteries and various components would be replaced or renewed to ensure optimal operation. However, the power plant will be manned 24-hours, 365 days a year. All applicable local, state, and federal requirements and best management practices (BMPs) would be incorporated into the construction activities for the project site. The construction contractor would be required to incorporate BMPs consistent with city zoning ordinances and with guidelines provided in the Page 12