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<br /> <br /> <br />Memorandum <br />February 26, 2025 <br />Page 5 <br />21202-23 North County Landfill_Noise DRAFT <br />Table 2. Summary of Existing Noise Level Measurements <br />ID Location <br />Monitoring <br />Period <br />Noise <br />Level <br />(dBA Leq) Dominant Source of Noise <br />ST-1 <br />About 430 feet south to the <br />intersection of East Harney Lane and <br />the North County Landfill access road <br />(about 30 feet from the centerline of <br />the access road) <br />09:45 am to <br />10:00 am 69.4 Automobiles and trucks on the <br />access road <br />ST-2 <br />Adjacent northeast corner of the <br />project site near East Harney Lane <br />(about 25 feet from the centerline) <br />10:42 am to <br />11:00 am 78.7 Automobiles and trucks on East <br />Harney Lane <br />ST-3 Access road at western boundary <br />of the North County Landfill <br />10:15 am to <br />10:30 am 55.9 <br />Aircraft overflights, nearby <br />worker activities (pick-up truck <br />and workers talking) <br />Source: Attachment A. <br /> <br />Existing Sensitive Receptors <br />Noise-sensitive receptors are locations where people are more susceptible to elevated noise <br />levels than others due to the amount of noise exposure and the types of activities typically <br />involved. Sensitive receptors include, but are not limited to residences, schools, places of <br />worship, hospitals, convalescent homes, hotels, and libraries. Vibration-sensitive receptors are <br />locations where people are more susceptible to the adverse effects of vibration. These include <br />residences and other buildings where people normally sleep, as well as buildings that have the <br />potential for activity interference (e.g., vibration sensitive equipment, schools, and places of <br />worship). In certain situations, vibration also can cause structural damage. <br />The surrounding land uses are primarily agricultural with scattered single-family residences. The <br />closest sensitive receptor to the project site is a residence located on-site about 460 feet <br />southeast of the intersection of East Harney Lane and the North County Landfill access road <br />(Figure 1). As mentioned above, the project-generated trucks would access the North County <br />Landfill via East Harney Lane and the North County Landfill access road. Sensitive receptors <br />along the haul route include residences as close as approximately 65 feet to the centerline of <br />East Harney Lane and schools, including Harmony Grove Elementary School and the Adelita <br />Montessori School, as close as approximately 70 feet to the centerline of East Harney Lane.