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3_Exhibit C_ADDENDUM ONLY
City of Pleasanton
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2020 - PRESENT
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02-22
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3_Exhibit C_ADDENDUM ONLY
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2/17/2023 2:21:14 PM
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CITY CLERK
CITY CLERK - TYPE
AGENDA REPORT
DOCUMENT DATE
12/22/2023
DESTRUCT DATE
15Y
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\BOARDS AND COMMISSIONS\PLANNING\AGENDA PACKETS\2020 - PRESENT\2023\02-22
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City of Pleasanton—Stoneridge Mall Residential Project <br />CEQA Checklist Section 15183 Checklist/15164 Addendum <br /> <br /> <br />70 FirstCarbon Solutions <br />Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480017/Consistency Checklist/21480017 Stoneridge Mall Residential Project Checklist <br />Addendum_Updated.docx <br />Nonetheless, CO hotspots can still occur when a transportation facility’s design or orientation <br />prevents the adequate dispersion of CO emissions from vehicles, resulting in the accumulation of <br />local CO concentrations. The design or orientation of a transportation facility that may prevent the <br />dispersion of CO emissions include tunnels, parking garages, bridge underpasses, natural or urban <br />canyons, below-grade roadways, or other features where vertical or horizontal atmospheric mixing is <br />substantially limited. The proposed project would not include any of these types of facilities. <br />Finally, the proposed project would not result in any significant impacts related to transportation. As <br />discussed in further detail in Transportation Section, all studied roadway segments and intersections <br />would operate under applicable City and Alameda County Transportation Commission (ACTC) <br />thresholds in combination with the proposed project vehicle trips and existing traffic levels. The <br />proposed project is estimated to generate 1,710 daily trips, 113 trips in the AM peak-hour (63 In/50 <br />Out), and 104 trips in the PM peak-hour (45 In/59 Out). Thus, the proposed project would be <br />consistent with the approved 2012 Housing Element and LOS standards. Therefore, based on the <br />above criteria, the proposed project would not exceed the CO screening criteria and would have a <br />less than significant impact related to CO. <br />Therefore, there are no environmental effects that are peculiar to the proposed project or the <br />parcels on which the proposed project would be located. Impacts would be less than significant and <br />the proposed project would not result in a new or more severe adverse impact that was not <br />previously identified in the Prior EIR. <br />c) Sensitive Receptors <br />Prior EIR Conclusions <br />The Prior EIR concluded that development facilitated by the General Plan Amendment and Rezonings <br />could potentially include residential or mixed-use developments that could expose sensitive <br />receptors to substantial health risk from diesel particulate matter (DPM) and other TACs from mobile <br />and stationary sources. However, that analysis identified that with implementation of the Prior EIR <br />MM 4.B-4, Reduce Exposure to TACs, the impacts could be reduced to less than significant. <br />Analysis of Proposed Project <br />Construction Toxic Air Contaminants Generation <br />As discussed in the BAAQMD’s Air Quality Guidelines, construction activity using diesel-powered <br />equipment emits DPM, a known carcinogen. A 10-year research program demonstrated that DPM <br />from diesel-fueled engines is a human carcinogen and that chronic (long-term) inhalation exposure <br />to DPM poses a chronic health risk.31 The California Office of Environmental Health Hazard <br />Assessment (OEHHA) and ARB developed recommended methods for conducting Health Risk <br />Assessments (HRAs). The majority of heavy diesel equipment usage would occur during the grading <br />phase of construction, which would occur over a brief duration. Nearby sensitive receptors that <br />surround the project site would be exposed to construction contaminants only for the duration of <br />construction. This brief exposure period would substantially limit exposure to hazardous emissions. <br /> <br />31 California Air Resources Board (ARB). 1998. Proposed Identification of Diesel Exhaust as a Toxic Air Contaminant.
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