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3. Environmental Checklist San Leandro Treatment Wetland IS/MND 3-8 February 2024 Table 3-2. Regional Attainment Status for CAAQS and NAAQS Pollutant Averaging Time California Standards National Standards Concentration Attainment Status Concentration Attainment Status Ozone (O3) 8 Hour 0.070 ppm Nonattainment 0.070 ppm Primary same as secondary Nonattainment 1 Hour 0.09 ppm (180 µg/m3) Nonattainment N/A N/A Carbon Monoxide (CO) 8 Hour 9.0 ppm (10 mg/m3) Attainment 9 ppm (10 mg/m3) Attainment 1 Hour 20 ppm (23 mg/m3) Attainment 35 ppm (40 mg/m3) Attainment Nitrogen Dioxide (NO2) 1 Hour 0.18 ppm (339 µg/m3) Attainment 0.100 ppm Unclassified Annual Arithmetic Mean 0.030 ppm (57 µg/m3) 0.053 ppm (100 µg/m3) Attainment Sulfur Dioxide (SO2) 24 Hour 0.04 ppm (105 µg/m3) Attainment 0.014 Attainment 1 Hour 0.25 ppm (655 µg/m3) Attainment 0.075 ppm (196 µg/m3) Attainment Coarse Particulate Matter 10 Micrometers or Less in Diameter (PM10) Annual 20 µg/m3 Nonattainment N/A N/A 24 Hour 50 µg/m3 Nonattainment 150 µg/m3 Unclassified Fine Particulate Matter 2.5 Micrometers or Less in Diameter (PM2.5) Annual 12 µg/m3 Nonattainment 12 µg/m3 Unclassified 24 Hour N/A N/A 35 µg/m3 Nonattainment Lead 30-day Average 1.5 µg/m3 Attainment N/A N/A Calendar Quarter N/A N/A 0.15 µg/m3 Attainment Source: BAAQMD 12 Note: µg/m3= micrograms per cubic meter; N/A = not applicable; ppm = parts per million Local Bay Area Air Quality Management District The BAAQMD controls criteria and TACs. The primary role of cities in achieving and maintaining regional air quality standards is through land use decision-making, which can affect vehicle miles traveled, and through other measures that manage the emission of pollutants. The BAAQMD identifies specific transportation control 12 Bay Area Air Quality Management District. “Air Quality Standards and Attainment Status”. Available at https://www.baaqmd.gov/about- air-quality/research-and-data/air-quality-standards-and-attainment-status