PD BACKGROUND REPORT (PL-SMA-2023-000040)

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There may be a modest increase in vehicular emissions during construction, but otherwise all other air pollution associated with the project should be negligible. Additionally, the long-term traffic generation, and thus vehicular emission, will be limited to typical residential use. Air pollutants during construction will be limited and temporary. The main sources of short-term air pollutants are construction equipment exhaust and dust. Ala Heiau Road is a dirt road that is prone to dust impacts. Rules and regulations outlined in Hawaii Administrative Rules Chapter 59 "Ambient Air Quality," and Chapter 60.1 "Air Pollution," will be followed during all construction and operation activities. HAR §11-60 on Fugitive Dust prohibits visible emissions of dust from construction activities. These regulations will be strictly followed to prevent dust impacts to Ala Heiau Road. In addition, reasonable measures to control airborne and visible fugitive dust from road areas are outlined by the Department of Health's Clean Air Branch. These measures include, but are not limited to: • Planning the different phases of construction, focusing on minimizing the amount of airborne, visible fugitive dust -generating materials and activities, centralizing on -site vehicular traffic routes, and locating potential dust - generating equipment in areas of the least impact. • Providing adequate water sources at the site prior to start-up of construction activities; Landscaping and providing rapid covering of bare areas, including slopes, starting from the initial grading phase. • Minimizing airborne, visible fugitive dust from shoulders, and access roads. • Providing reasonable dust control measures during weekends, after hours, and prior to daily start-up of construction activities. • Controlling airborne, visible fugitive dust from debris being hauled away from the project site. Minimal grading will be required. Construction Best Management Practices (BMPs) will prevent impacts from stormwater runoff. These are discussed in Section I, subsection P of this report. Pursuant to County drainage requirements, appropriate drywell and/or similar means to capture runoff from any improvements will be built, if necessary, in conjunction with the appropriate permitting process. The project will utilize an individual wastewater system approved by the Department of Health, which will mitigate potential water quality, coastal ecosystems, and soil impacts due to wastewater. Construction BMPs and mitigating measures will prevent impacts to soil. The subject site is zoned Agricultural but has a Land Study Bureau Overall Productivity Rating of "E" or very poor. The long-term solid waste impact will be consistent with residential use with little potential for waste management issues or noxious wastes.