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4 Environmental Analysis <br /> 4.3 Air Quality <br /> oo Mobilization of the construction equipment may occur in the open spaces of the shared <br /> facilities area. Equipment and vehicle travels may also occur within the 32-acre Project <br /> site and the shared facilities area during the construction period. <br /> oo Land usage: 32 acres <br /> oo Grading area: 160 acres total grading activity <br /> oo Material exported: 1,000 cubic feet <br /> oo Material imported: zero cubic feet <br /> Combustion <br /> Combustion emissions during construction will result from: <br /> oo Exhaust from the onsite diesel construction equipment; <br /> oo Exhaust from onsite water trucks used to control construction dust emissions; <br /> oo Exhaust from pickup trucks and diesel trucks used to transport workers and materials <br /> around the Project site; <br /> oo Exhaust from diesel trucks used to deliver equipment and materials; and <br /> oo Exhaust from automobiles used by workers to commute to and from the Project site. <br /> Fugitive Dust <br /> Fugitive dust emissions during construction will result from: <br /> oo Earth-moving activities; and <br /> oo Vehicle travel on paved and unpaved surfaces. <br /> 4.3.4.2 Operation <br /> Once constructed, the Project would operate 7 days per week, 365 days per year. The facility <br /> would be operated by the Applicant or an affiliated company remotely. Periodic augmentation of <br /> batteries within the Project site may occur. Only occasional, onsite maintenance is expected to <br /> be required following commissioning, including replacement of inverter power modules, filters, <br /> and miscellaneous electrical repairs on an as-needed basis. No permanent sanitary facilities <br /> would be required. <br /> During operation of the Project substation, operations and maintenance (O&M) staff would visit <br /> the substation periodically for switching and other operations activities. Maintenance trucks would <br /> be utilized to perform routine maintenance, including, but not limited to, equipment testing, <br /> monitoring, repair, routine procedures to ensure service continuity, and standard preventative <br /> maintenance. <br /> The expected maintenance would generate little traffic during operation. Heavy equipment would <br /> not be utilized during normal operation. Large or heavy equipment may be brought to the facility <br /> infrequently for equipment repair or replacement, or for vegetation control. Routine operations <br /> Griffith Energy Storage Project 4.3-20 Tetra Tech/SCH 2022120675 <br /> Draft Environmental Impact Report August 2023 <br />