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4 Environmental Analysis 4.3 Air Quality 0o Workers shall receive training to recognize the symptoms of Valley Fever and shall be instructed to promptly report suspected symptoms of work-related Valley Fever to a supervisor. 0o A Valley Fever informational handout shall be provided to all onsite construction personnel. The handout shall, at a minimum, provide information regarding the symptoms, health effects, preventative measures, and treatment. 0o Onsite personnel shall be trained on the proper use of personal protective equipment, including respiratory equipment. National Institute for Occupational Safety and Health—approved respirators shall be provided to onsite personnel upon request. 4.3.8 Pacific Gas and Electric Tesla Substation Improvements To accommodate the Project, PG&E would be responsible for siting, design, and construction of the gen-tie line from the point of change of ownership (POCO) to its substation. Two options are available for the gen-tie line route from this point. The first option would be to connect via an aboveground line from the POCO to a point on the west side of the southwestern boundary of the substation. The second option is to enter the substation on the southwestern edge by way of a belowground line as shown in Figure 2-1 of Chapter 2, Project Description. Either right-of-way corridor is assumed to be up to 100 feet in width. Additionally, PG&E would upgrade the Tesla Substation, and the improvements would include the installation of a grounding system, disconnect switches, surge arresters, outdoor lighting and outlets, and fiber termination for the gen-tie line. The improvements made would be within the existing Tesla Substation footprint. PG&E would implement Mitigation Measures AQ-1, AQ-2, and AQ-3 as standard practices, such that these improvements would not have a substantial adverse effect on any applicable air quality plans, nor would the improvements cause an increase in pollutants that may be considered as nonattainment by federal or state standards. The Tesla Substation improvements would not expose any sensitive receptors to substantial pollutants or any objectional odors. Therefore, no additional mitigation is required. 4.3.9 Cumulative Impacts The SJVAB is considered the area of cumulative effects, and it is currently nonattainment for the California AAQS for 1-hour ozone 8-hour ozone PM,o and PM2.5, and the NAAQS for 8-hour ozone and PM2.5. Therefore, there is an existing adverse cumulative impact in the SJVAB relative to these pollutants. The contribution of a project's individual air emissions to regional air quality impacts is a cumulative effect due to the collective nature of the air quality resource. Emissions from past, present, and future projects in the region also have or will contribute to adverse regional air quality impacts on a cumulative basis. No single project by itself would be sufficient in size to result in nonattainment of ambient air quality standards. Instead, a project's individual emissions contribute to existing cumulative air quality conditions. The project-level thresholds for criteria air pollutants are based on levels by which new sources are not anticipated to contribute to an air quality Griffith Energy Storage Project 4.3-32 Tetra Tech/SCH 2022120675 Draft Environmental Impact Report August 2023