3_Exhibit B - Laserfiche WebLink

3/6 Based on the BAAQMD’s Permitting Stationary Sources Risks and Hazards Screening Tool, three existing stationary sources of TAC emissions were identified within 1,000 feet of the Project, shown in Figure 1 and Table 1.2,3 Preliminary health risk screening values at the Project’s receptors from the stationary sources were determined using the Stationary Source Data Request Form and confirmed by the BAAQMD. The BAAQMD’s Diesel Internal Combustion Engine Distance Multiplier Tool were used to refine the screening values to represent the attenuated health risks that can be expected with increasing distance between the sensitive receptors and the diesel engines. 5 Based on the City’s Planning website,6 there is one commercial development that may occur on the adjacent parcel to the north of the Project. This is the 2019 Stoneridge Mall Commercial Expansion Project that was proposed by the same applicant as the Project. The Design Review approval for that 2019 project expired earlier this year. However, because the project is still shown on the City’s website and because potential redevelopment of the 2019 project site is still foreseeable, that project was included in the analysis. The 2019 project proposed to demolish an existing department store building and construct up to approximately 255,000-square-feet of new retail, cinema, specialty, and health club facilities uses several in two-story buildings. This HRA conservatively assumes that the 2019 project would include a diesel emergency generator. The BAAQMD does not issue stationary source permits for projects that result in an excess cancer risk greater than 10 in 1 million or a chronic hazard index (HI) greater than 1.0. Conservatively assuming the generator would result in a maximum excess cancer risk of 10 in 1 million, the BAAQMD’s Risk and Hazards Emissions Screening Calculator (Beta Version)7 was used to estimate the equivalent screening-level health risks values for chronic HI and annual average PM2.5 concentrations, presented in Table 1. No other new stationary sources of TAC emissions were planned within 1,000 feet of the Project based on the review of the City’s Planning website. This HRA also includes health risk impacts from mobile sources. Because there is no railroad with fossil fuel-burning locomotives within 1,000 feet of the Project, the HRA only includes highways and major roadways with over 10,000 vehicles per day. The BAAQMD’s highway raster file includes impacts from highways in the Bay Area while the major street raster file includes impacts from all roadways with daily traffic above 30,000 vehicles per day. The BAAQMD raster files were used to estimate the health impacts from all highways and major streets, shown in Table 1. Based on the review of 2020 average annual daily traffic (AADT) volumes provided by Alameda County Transportation Commission, there are two roadways with an AADT volume between 10,000 AADT and 30,000 AADT within 1,000 feet of the Project site.8 The BAAQMD previously had a roadway screening analysis calculator for calculating impacts of roadways between 10,000 ADDT and 30,000 AADT, but BAAQMD has since removed this roadway screening analysis calculator from their website. To be conservative, this analysis used the roadway screening analysis calculator to account for the health risk impacts from the two roadway segments. However, it should be noted that the values 2 BAAQMD. 2022. BAAQMD CEQA Guidelines, Risk and Hazard Screening Analysis Process Flow Chart. Revised August 29. 3 BAAQMD, 2022. Email communication titled “FW: Public Records Number 2022-09-0151: Stationary Source Request” between Yu-Han (Amy) Chen at Ramboll and BAAQMD. October 25. 5 BAAQMD, 2022. Health Risk Calculator with Distance Multiplier. May. Available at: https://www.baaqmd.gov/~/media/files/planning-and-research/ceqa/tools/public-baaqmd-health-risk-calculator- beta-5-0-xlsx-xlsx.xlsx?la=en. 6 City of Pleasanton, 2022. Community Development Department Update. May 12, 2022, available at http://www.cityofpleasantonca.gov/gov/depts/cd/default.asp. 7 Ibid. 8 Alameda County Transportation Commission, 2014. Countywide Travel Demand Model. Planning Area 4; 2020 Daily Model Vehicle Volumes, July.