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City of Pleasanton–10x Genomics Project Environmental Checklist and <br />Initial Study/Mitigated Negative Declaration Environmental Evaluation <br /> <br /> <br />FirstCarbon Solutions 45 <br />Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480024/ISMND/wp/21480024 10x Genomics Project Full Screencheck ISMND.docx <br />Source Source Type <br />Distance <br />from MIR(1) <br />(feet) <br />Cancer Risk <br />(per <br />million) <br />Chronic <br />HI <br />PM2.5 <br />Concentration <br />(µg/m3) <br />Notes: <br />N/A = no data available <br />(1) The maximum impacted sensitive receptor represents a multi-family residence approximately 130 feet east of the <br />project site. <br />(2) Assumes emissions remain constant with time. <br />Source: Appendix A. <br /> <br />As noted in Table 10, the cumulative impacts from project construction and existing sources of TACs <br />would be less than the BAAQMD’s cumulative thresholds of significance after implementation of <br />MM AIR-2. Thus, the cumulative health risk impacts from project construction would be less than <br />significant with mitigation. <br />Criterion 3: Project-Specific Toxic Air Contaminants During Operation <br />As previously described, the proposed project at full buildout is expected to generate approximately <br />4,520 estimated daily vehicle trips, or a net increase of 3,680 daily vehicle trips beyond existing <br />conditions, principally from employee passenger vehicles traveling to and from the project site. <br />Because nearly all passenger vehicles are gasoline-fueled, the proposed project would not generate <br />significant amounts of DPM emissions during operation. Therefore, the proposed project would not <br />result in significant health impacts to nearby sensitive receptors during operation. In addition, as <br />discussed under Impact 3(b), the operational CO hotspot impact as a result of project operations <br />would be less than significant. <br />Criterion 4: CO Hotspot <br />As discussed under Impact 3(b), the operational CO hotspot impact as a result of project operations <br />would be less than significant. <br />d) Result in other emission (such as those leading to odors) adversely affecting a substantial <br />number of people? <br />Less than significant impact. As stated in the BAAQMD 2017 Air Quality Guidelines,27 odors are <br />generally regarded as an annoyance rather than a health hazard and the ability to detect odors <br />varies considerably among the populations and overall is subjective. The BAAQMD does not have a <br />recommended odor threshold for construction activities. However, the BAAQMD recommends <br />operational screening criteria based on the distance between receptors and types of sources known <br />to generate odors. For projects within the screening distances, the BAAQMD has the following <br />threshold for project operations: <br /> <br />27 Bay Area Air Quality Management District (BAAQMD). 2017. Bay Area Air Quality Management District California Environmental <br />Quality Act Air Quality Guidelines. May. Website: https://www.baaqmd.gov/~/media/files/planning-and- <br />research/ceqa/ceqa_guidelines_may2017-pdf.pdf?la=en. Accessed January 6, 2021.