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3.0 ENVIRONMENTAL CHECKLIST <br />City of San Leandro 1388 Bancroft Avenue Project <br />November 2018 Initial Study/Mitigated Negative Declaration <br />3.0-11 <br />Pollutant Averaging Time <br />California Standards National Standards <br />Concentration Attainment <br />Status Concentration Attainment <br />Status <br />Sulfur Dioxide (SO2) <br />24 Hours 0.04 ppm <br />(105 µg/m3) A 0.14 ppm <br />(365/µg/m3) — <br />1 Hour 0.25 ppm <br />(665 µg/m3) A 0.075 ppm <br />(196/µg/m3) — <br />Annual Arithmetic Mean 0.030 ppm <br />(80/µg/m3) — <br />Particulate Matter <br />(PM10) <br />Annual Arithmetic Mean 20 µg/m3 N No standard Not <br />applicable <br />24 Hours 50 µg/m3 N 150 µg/m3 U <br />Particulate Matter – <br />Fine (PM2.5) <br />Annual Arithmetic Mean 12 µg/m3 N 15 µg/m3 A <br />24 Hours 35 µg/m3 N <br />Sulfates 24 Hours 25 µg/m3 A — — <br />Lead <br />30-Day Average 1.5 µg/m3 — A <br />Calendar Quarter — — 1.5 µg/m3 A <br />Rolling 3-Month Average — — 0.15 µg/m3 — <br />Hydrogen Sulfide 1 Hour 0.03 ppm <br />(42 µg/m3) U — — <br />Vinyl Chloride <br />(chloroethene) 24 Hours 0.01 ppm <br />(26 µg/m3) <br />No <br />information <br />available <br />— — <br />Visibility-Reducing <br />Particles <br />8 Hours <br />(10:00 to 18:00 PST) — U — — <br />Source: BAAQMD 2017a <br />Notes: A=attainment; N=nonattainment; U=unclassified; mg/m3=milligrams per cubic meter; ppm=parts per million; ppb=parts per <br />billion; µg/m3=micrograms per cubic meter <br />Based on the nonattainment status, O3, PM10, and PM2.5 are the pollutants most intensely affecting <br />the SFBAAB. Concentrations near the project site can be inferred from ambient air quality <br />measurements conducted by the BAAQMD at nearby air quality monitoring stations. The Oakland- <br />9925 International Boulevard air quality monitoring station is the closest station to the project site, approximately 1.7 miles to the northeast. No monitoring stations in the project vicinity collect data <br />for PM10. Table 3.3-3 summarizes the data published since 2015 from the closest monitoring stations <br />for each year that monitoring data were provided.