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4 Environmental Analysis <br /> 4.3 Air Quality <br /> experienced in the vicinity of the Project. Table 4.3-3 summarizes the most recent air quality data <br /> from 2019 through 2021 with the number of days exceeding the ambient air quality standards. <br /> Table 4.3-3. Local Ambient Air Quality Monitoring Data for the Years 2019 to 2021 <br /> PeriodAveraging 2019 2020 2021 <br /> Ozone(03)-Tracy-Airport(A),California Monitoring Station(AQS Site ID:06-077-3005) <br /> 1-hour Maximum Concentration(ppm) 0.095 0.086 0.089 <br /> Number of days exceeding CAAQS=0.09 ppm 2 0 0 <br /> 8-hour Maximum Concentration 0.079 0.078 0.077 <br /> Number of days exceeding CAAQS=0.070 ppm 3 3 3 <br /> Number of days exceeding NAAQS=0.070 ppm 3 3 3 <br /> Nitrogen Dioxide(NO2)-Tracy-Airport(A),California Monitoring Station(AQS Site ID:06-077-3005) <br /> 1-hour Maximum Concentration(ppb) 37 37 36 <br /> Number of days exceeding CAAQS=180 ppb 0 0 0 <br /> Number of days exceeding NAAQS=100 ppb 0 0 0 <br /> Annual Average Concentration(ppm)(53 ppb) 4 4 - <br /> Carbon Monoxide(CO)-Stockton-Hazelton Street,California Monitoring Station(AQS Site ID:06-077-1002) <br /> 1-hour Maximum Concentration(ppm) 3.1 2.8 2.2 <br /> Number of days exceeding CAAQS=20 ppm 0 0 <br /> Number of days exceeding NAAQS=35 ppm 0 0 0 <br /> 8-hour Maximum Concentration <br /> Number of days exceeding CAAQS=9.0 ppm <br /> Number of days exceeding NAAQS=9.0 ppm <br /> Coarse Particulate Matter(PMlo)-Tracy Airport(A),California Monitoring Station(AQS Site ID:06-077-3005) <br /> 24-hour Maximum Concentration(lag/m3) 247 229 <br /> Number of days exceeding CAAQS=50 Nglm3 10 40 <br /> Number of days exceeding NAAQS=150 Nglm3 1 2 <br /> Annual Average Concentration(state method)(tag/m3)(20 Nglm3) <br /> Fine Particulate Matter(PM2.5)-Tracy Airport(A)and(),California Monitoring Station(AQS Site ID:06-077-3005)' <br /> 24-hour Maximum Concentration(Ng/m3) 30.7 117.5 59.6 <br /> Number of days exceeding NAAQS=35 pg/M3 0 19 2 <br /> Annual Average Concentration(lag/m3)(12 Nglm3) 6.2 <br /> Sulfur Dioxide(S02)-Fresno-Garland,California Monitoring Station(AQS Site ID:06-019-0011) <br /> 1-hour Maximum Concentration(ppm) 0.009 0.016 0.008 <br /> Number of days exceeding NAAQS=0.075 ppm 0 0 0 <br /> 24-hour Maximum Concentration(ppm) 0.002 0.002 0.003 <br /> Number of days exceeding NAAQS=0.14 ppm 0 0 0 <br /> Annual Average Concentration(ppm)(0.03 ppm) <br /> Notes: <br /> 1/—Data for 2019 and 2020 are from Tracy Airport(A)Monitor Station(AQS Site ID:06-077-3005).Data for 2021 were not available from this site.Data for <br /> 2021 are from Tracy Airport(-)Monitor Station,which is a preliminary site with no monitoring ID assigned. <br /> Ng/m3—microgram per cubic meter;CAAQS—California ambient air quality standards;NAAQS—National ambient air quality standards;ppb—parts per billion; <br /> ppm—parts per million <br /> Sources:CARB 2022a,2022b <br /> Griffith Energy Storage Project 4.3-15 Tetra Tech/SCH 2022120675 <br /> Draft Environmental Impact Report August 2023 <br />