Item 26 - Public Hearing Vista Heritage Charter School (601 North Fairview Street)

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Vista Charter Public Schools District Office and Outdoor Space Project CEQA Exemption 15183 significant on -site localized construction emissions. As such the project's localized construction emissions would not exceed the LSTs for SRA 17 and localized significance impacts from project - related construction would be less than significant. Operational LST According to SCAQMD LST methodology, LSTs would apply to operational activities if the project includes stationary sources or attracts mobile sources that may spend extended periods queuing and idling at the site (i.e., warehouse or transfer facilities). The proposed project does not include such uses. Thus, due to the lack of such emissions, no long-term LST analysis is needed. Operational LST impacts would be less than significant in this regard. Carbon Monoxide Hotspots CO emissions are a function of vehicle idling time, meteorological conditions, and traffic flow. Under certain extreme meteorological conditions, CO concentrations near a congested roadway or intersection may reach unhealthful levels (e.g., adversely affecting residents, school children, hospital patients, and the elderly). The Basin is designated as an attainment/maintenance area for the Federal CO standards and an attainment area under State standards. There has been a decline in CO emissions even though vehicle miles traveled (VMT) on U.S. urban and rural roads have increased; estimated anthropogenic CO emissions have decreased 68 percent between 1990 and 2014. In 2014, mobile sources accounted for 82 percent of the nation's total anthropogenic CO emissions.' Three major control programs have contributed to the reduced per -vehicle CO emissions, including exhaust standards, cleaner burning fuels, and motor vehicle inspection/maintenance programs. According to the SCAQMD CEQA Air Quality Handbook, a potential CO hotspot may occur at any location where the background CO concentration already exceeds 9.0 parts per million (ppm), which is the 8-hour California ambient air quality standard. The closest monitoring station to the project site that monitors CO concentration is Anaheim — 812 West Vermont Street, which is located approximately 4.5 miles north of the project site. The maximum CO concentration at Anaheim — 812 West Vermont Street station was measured at 1.976 ppm in 2022.8 Given that the background CO concentration does not currently exceed 9.0 ppm, a CO hotspot would not occur at the project site. Therefore, CO hotspot impacts would be less than significant in this regard. Asbestos Asbestos is a term used for several types of naturally occurring fibrous minerals that are a human health hazard when airborne. The most common type of asbestos is chrysotile, but other types such as tremolite and actinolite are also found in California. Asbestos is classified as a known human carcinogen by State, Federal, and international agencies and was identified as a toxic air contaminant by CARB in 1986. Asbestos can be released from serpentinite and ultramafic rocks when the rock is broken or crushed. At the point of release, the asbestos fibers may become airborne, causing air quality and human health hazards. These rocks have been commonly used for unpaved gravel roads, U.S. Environmental Protection Agency, Carbon Monoxide Emissions, https://cfpub.epa.gov/roe/indicator pdf.cfm?i=10, accessed July 3, 2023. 8 California Air Resources Board, Air Quality and Meteorological Information, 4.3.3 https://www.arb.ca.gov/agmis2/agdselect.php?tab=specialrpt, accessed July 3, 2023. Dec I y ouncil 26 — 77 1/16/202 e 17