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Cabrillo at First Mixed-Use Residential Air Quality, Global Climate Change, HRA, and Energy Impact Analysis 44 19386 A [Inhalation absorption factor] = 1 EF [Exposure frequency (days/year)] = 350 ED [Exposure duration (years)] = 30 for adults (for an individual who is an adult at opening year), 14 for children (from 2-16 years), 14 for adults (from 16-30 years), 2 for infants, and 1 for 3rd Trimester ASF [Age sensitivity factor) = 10 for 3rd trimester to 2 years of age, 3 for 2 to 16 years of age, and 1 for 16 to 30 years of age FAH [Fraction of time spent at home] = 1 for 3rd trimester to 2 years of age, 1 for 2 to 16 years of age, and 0.73 for 16 to 30 years of age 106 [Micrograms to milligrams conversion] AT [Average time period over which exposure is averaged in days] = 25,550 There currently is no SCAQMD TAC threshold for “existing” cancer risk to sensitive receptors. The SCAQMD TAC threshold of 10 in one million is defined as the “maximum incremental cancer risk” (MICR). As the project does not involve the construction of sources that would significantly contribute to “incremental cancer risk,” the application of the 10 in one million threshold is not well applied in this case. Other air quality districts have refined methodology and thresholds for evaluation of the health risks posed by heavily traveled roadways and freeways to adjacent receptors. For example, the Bay Area Air Quality Management District has a “Roadway Screening Analysis” procedure and thresholds based on annual average daily traffic (AADT) and distance from the source. The San Luis Obispo Air Pollution Control District has a requirement that new land use projects that will place sensitive receptors (e.g., residential units) in close proximity to existing toxics sources (e.g., freeway) must not exceed the CEQA health risk threshold of 89 in a million. The AERMOD model run results are shown in Appendix C. Figure 5 illustrates the cancer risk to the most affected age-group, infants (0-2 years). Table 13 show the cancer risk for the unborn child during the 3rd trimester, Table 14 shows the cancer risk to infants (0-2 years), Table 15 shows the cancer risk to children ages 2 to 16 years and Table 16 shows the cancer risk as that child becomes an adult (years 16-30). The highest cancer risk corresponds to infants 0-2 years (see Table 14). As shown in Table 14, all the infant receptors within the project site are exposed to cancer risks in excess of SCAQMD MICR threshold of 10 in a million, with the highest cancer risk at units closest to the 5 freeway, with a maximum cancer risk of 38.46 in one million at receptor 2. The same holds true for child (2-16 years) cancer risk, every child receptor within the project site is exposed to a cancer risk in excess of 10 in a million; with a maximum risk of 32.57 in one million at receptor 2. Therefore, infants and children will be exposed to cancer risks in excess of 10 in a million from freeway-related DPM sources. The assessment of cancer-related health risk to proposed sensitive receptors is based on the following most- conservative scenario: An unborn child in its 3rd trimester is potentially exposed to DPM emissions (via exposure of the mother) during the opening year. That child is born opening year and then remains at home for the entire first two years of life. From age 2 to 16, the child remains at home 100 percent of the time. From age 16 to 30, the child continues to live at home, growing into an adult that spends 73 percent of its time at home and lives there until age 30. Based on the above, ultra-conservative assumptions, the 30.25-year, cumulative carcinogenic health risk (3rd trimester [-0.25 to 0 years] + infant [0-2 years] + child [2-16 years] + adult [16-30 years]) to an individual born during the opening year of the project, and located in the project vicinity for the entire 30-year duration, is a maximum of 75.77 in a million at receptor location 2, as shown in Table 17. Furthermore, as shown in Table 17, every receptor on-site would be exposed to a 30.25-year, cumulative carcinogenic health risk in excess of the SCAQMD MICR threshold of 10 in a million, with the lowest risk (31.72 in a million) being at receptor locations furthest from the I-5 freeway. Therefore, the on-going operations of the proposed project could result in a significant impact due to the cancer risk from diesel emissions to the proposed project. As the cancer risk exceeds the SCAQMD MICR threshold of 10 in a million, mitigation is required. Mitigation requiring minimum efficiency reporting value (MERV) 13 filters would remove a substantial amount of particulates, including DPM. MERV 13 filters have a particle size removal efficiency rating of greater than 90 446/27/2022 Planning Commission 2 –97