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Cascade Energy Storage, LLC Battery Storage Project Hazardous Materials Storage Lithium-ion is a common battery storage medium. Attachment B includes a data sheet that includes an SDS for a common type of lithium-ion battery used for energy storage uses, which lists the composition of the technology. LG Chemical Limited is one of the suppliers for this application, but another supplier that produces identical technology may ultimately be used. Attachment C includes a copy of a hazard assessment prepared by the Research Foundation division of the National Fire Protection Association (NFPA). A spare parts container will also be located onsite within the central portion of the site to store spare parts necessary for ongoing maintenance. PG&E Interconnection Cascade Energy Storage, LLC holds a Large Generator Interconnection Agreement with PG&E which allows the 25 MW project to interconnect to the PG&E's 60 kV Weber substation located adjacent to the project site on the west. . Outdoor Electrical Equipment Inverters, switchgear, and additional electrical equipment required for the project would be installed in addition to the battery containers. Underground wires and cabling would run from the battery cable collection box(inside the structure)to a concrete pad housing the electrical equipment. All outside electrical equipment would be housed in the appropriate National Electrical Manufacturers Association (NEMA) rated enclosures. Underground or above ground wires will be run from the battery site to the POI, which is distance of approximately 900 feet. Telecommunication Facilities The project would also require telecommunication facilities to meet the communication requirements for interconnecting with the PG&E facilities and to support remote project operations monitoring. To provide for communication with PG&E facilities, a fiber-optic cable would be placed underground along the line connecting the project site switchyard with the PG&E point of interconnection along the project frontage. Utility interconnection regulations require the installation of a second separate, redundant fiber-optic cable. The redundant fiber-optic cable would also be installed within the project footprint. The fiber-optic cable is anticipated to be placed underground in trenches approximately 1 foot wide and 18 inches to 4 feet deep. The project would use local exchange carrier services for telecommunication to support remote monitoring requirements. The project would connect to telecommunication fiber-optic lines owned and managed by a local service provider. The cabinet holding the connection equipment would have a base of approximately 4 feet by 2 feet and would be approximately 5 feet in height. From the point of demarcation, an underground fiber-optic cable would be installed within the project footprint to connect the cabinet to the SCADA equipment. The SCADA system is critical to the California Independent System Operator (CAISO) and PG&E utility interconnection, and for the proper operation and maintenance of the project, which uses proprietary Page 8