2008 RES R-58-08 - Laserfiche WebLink

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1 2 3 4 5 6 7 8 9 10 il 12 13 14 15 16 17 18 19 20 21 22 23 24 25 27 28 As shown in Table 4.1-10 (Draft EIR, p. 4.1-34), CO concentrations are not anticipated to exceed the state ambient air quality standards. The future CO concentrations with and without the Project are Projected to be similar for all scenarios. The Project will increase the CO emissions by approximately 0.2 ppm for 1-hour and 0.1 ppm for 8-hour. These increases are not anticipated to be substantial as the concentrations are Projected to remain below the air quality standards. Adverse impacts to local air quality are not anticipated. (Draft EIR, p. 4.1- 33) The future 2009 CO concentrations will be higher than the existing levels at one receptor, and lower at three of the four receptors. The 2009 CO concentrations will increase by a maximum of 0.2 ppm. This increase is due to growth in the local traffic including the Project. However, this increase is not considered to be substantial. The 2030 CO concentrations are Projected to decrease between 1.8 and 3.8 ppm for the 1-hour, and between 1.3 and 2.9 ppm for the 8- hour. In general, the lower future CO concentration is primarily due to the anticipated decrease in the future emission rates as Projected by the EMFAC2007 program along with decreases Projected in background concentration levels by SCAQMD. While the future local traffic volumes are Projected to increase in the future, the emission level is more than offset by the decrease of background levels and emission factors. Therefore, no significant impacts are anticipated. (Ibid.) As shown in Table 4.1-15 (Draft EIR, p. 4.1-41), for all receptors, the worst-case lifetime exposure is less than the 10 per million threshold of significance. TAC concentrations on the Project site do not exceed the significance threshold. According to the SCAQMD, residents in the vicinity of the Project site will not be significantly impacted by TAC from emissions associated with the Agua Mansa Commerce Center. (Draft EIR, p. 4.1-41) None of the examined receptors will experience Project-generated DPM concentrations in the future that will exceed the Significance Threshold for Lifetime Cancer Risk. Receptor 1 experiences the highest concentrations of the nine modeled receptors. It lies on the northwest corner of Riverside Avenue and Santa Ana Avenue, and represents a residential land use. (Ibid.). Non-cancer risks are based on the peak 24-hour DPM concentration and the Chronic Inhalation Reference Exposure Level published by the OEHHA of 5 µg/m3. Table 4.1-16 (Draft EIR, p. 4.1-42) shows the worst-case Hazard Index at the nine receptor locations. (Draft EIR, p. 4.1-41) 7