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Cabrillo at First Mixed-Use Residential Air Quality, Global Climate Change, HRA, and Energy Impact Analysis 21 19386 MONITORED AIR QUALITY The air quality at any site is dependent on the regional air quality and local pollutant sources . Regional air quality is determined by the release of pollutants throughout the air basin. Estimates of the existing emissions in the Basin provided in the Final 2016 Air Quality Management Plan prepared by SCAQMD (March 2017) indicate that collectively, mobile sources account for 60 percent of the VOC, 90 percent of the NOx emissions, 95 percent of the CO emissions and 34 percent of directly emitted PM2.5, with another 13 percent of PM2.5 from road dust. The SCAQMD has divided the South Coast Air Basin into 38 air-monitoring areas with a designated ambient air monitoring station representative of each area. The project site is located in the Central Orange County Air Monitoring Area (Area 17). The nearest air monitoring station to the project site is the –Anaheim – Pampas Lane Monitoring Station (Anaheim Station). The Anaheim Station is located approximately 8.18 miles northwest of the project site at 1630 W. Pampas Lane, Anaheim. However, it should be noted that due to the air monitoring stations distances from the project site, recorded air pollution levels at the air monitoring station reflect with varying degrees of accuracy, local air quality conditions at the project site. Table 4 presents the monitored pollutant levels from the Redlands Station. Table 4 summarizes 2018 through 2020 published monitoring data, which is the most recent 3-year period available. The data shows that during the past few years, the project area has exceeded the ozone standards. Ozone During the 2018 to 2020 monitoring period, the State 1-hour concentration standard for ozone was exceeded between one and six days each year at the Anaheim Station. The State 8-hour ozone standard has been exceeded between one and 16 days each year over the past three years at the Anaheim Station. The Federal 8-hour ozone standard was exceeded between one and 15 days each year over the past three years at the Anaheim Station. Ozone is a secondary pollutant as it is not directly emitted. Ozone is the result of chemical reactions between other pollutants, most importantly hydrocarbons and NO2, which occur only in the presence of bright sunlight. Pollutants emitted from upwind cities react during transport downwind to produce the oxidant concentrations experienced in the area. Many areas of the SCAQMD contribute to the ozone levels experienced at the monitoring station, with the more significant areas being those directly upwind. Carbon Monoxide CO is another important pollutant that is due mainly to motor vehicles. The Anaheim Station did not record an exceedance of the state or federal 8-hour CO standard for the last three years. Nitrogen Dioxide The Anaheim Station did not record an exceedance of the State or Federal NO2 standards for the last three years. Particulate Matter The State 24-hour concentration standards for PM10 were exceeded between two and five days each year over the last three years at the Anaheim Station. Over the past three years, the Anaheim Station did not record an exceedance of the Federal 24-hour standards for PM10. Over the last three years, the Federal 24-hour standard for PM2.5 was exceeded between four and 12 days each year over the last three years at the Anaheim Station. 216/27/2022 Planning Commission 2 –74