Reso PC16-23 PC 0116 Reso CEQA - Sandpiper

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Section 4.0 — Environmental Setting and Discussion of Impacts permitted facilities within one-fourth of a mile of the proposed school site that might reasonably be anticipated to emit hazardous emissions. The air quality management district receiving written notification shall provide the requested information and provide a written response to the lead agency within 30 days of receiving the notification. The negative declaration shall be conclusively presumed to comply if no response is received within 30 days. The City notified BAAQMD in writing in March 2016. No response has been received. 4.3.1.2 Air Quality Standards Criteria Air Pollutants In recognition of the adverse effects of degraded air quality, Congress and the California Legislature enacted the Federal and California Clean Air Acts, respectively. As a result of these laws, the USEPA and CARB have established ambient air quality standards at both the state and federal level for what are commonly referred to as "criteria pollutants." Federal and state standards for these pollutants are based on human health -based and/or environmentally -based criteria. Criteria air pollutant concentrations below the established standards are not considered to present a threat to human health or the environment. Criteria air pollutants include ozone, carbon monoxide, sulfur dioxide, PM10, PM2.5, nitrogen oxide, and lead. BAAQMD has air monitoring stations at 24 locations throughout the Bay Area, with the monitoring station located in Redwood City being closest to the project site. Each year, BAAQMD publishes a summary of the air pollution data collected from the monitoring stations. During the past three years of available data (2013 to 2015), ozone concentrations in the Bay Area exceeded both federal and state standards up to 12 days per year. PMio concentrations in the Bay Area exceeded state standards up to six measurement days per year, and PM2.5 concentrations exceeded federal standards up to 13 measurement days per year for the three years of available data (2013 to 2015).9 Nitrogen dioxide levels exceeded the state standard one time in the last three years. Ambient air quality standards for other criteria air pollutants were not exceeded in the Bay Area over the last three years. 10 Criteria pollutants that exceeded standards in the past three years are described below. Nitrosen Oxide Nitrogen Oxides (NO,) are gases formed from atmospheric nitrogen and oxygen, when combustion takes place under conditions of high temperature and high pressure. NO. is a precursor to the criteria air pollutant ozone. Ozone High ozone levels are caused by the cumulative emissions of reactive organic gases (ROG) and nitrogen oxides (NO,). These precursor pollutants react under certain meteorological conditions to form high ozone levels. Controlling the emissions of these precursor pollutants is the focus of the s PMIG and PM2.5 are measured every sixth day; therefore, PMic levels are estimated to exceed the standard up to 36 days per year and PM�,_s levels are estimated to exceed the standard up to 78 days per year. "Bay Area Air Quality Management District, Bay Area Air Pollution Sunanimy — 2015. 2015. City of Redwood City 20 Initial Study/Mitigated Negative Declaration Sandpiper Elementary School Facilities Expansion November 2016