RES 211231 Exhibit A - Laserfiche WebLink

City of Pleasanton–10x Genomics Project Environmental Checklist and Initial Study/Mitigated Negative Declaration Environmental Evaluation FirstCarbon Solutions 97 Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480024/ISMND/wp/21480024 10x Genomics Project Full Screencheck ISMND.docx (iii) create or contribute runoff water which would exceed the capacity of existing or planned stormwater drainage systems or provide substantial additional sources of polluted runoff; or Less than significant impact. Consistent with the requirements of the Construction General Permit, the proposed project would implement a SWPPP during construction that would include structural and non-structural BMPs to prevent significant volumes of polluted runoff during construction. The proposed project’s bioretention treatment areas and drainage management areas would prevent significant amounts of pollutants from entering the storm drainage system at buildout. Collectively, these features would ensure that the proposed project would not contribute runoff that would exceed the capacity of downstream stormwater drainage systems or contribute substantial volumes of polluted runoff to the storm drainage system. Therefore, the proposed drainage would not exceed the capacity of the City’s existing stormwater drainage systems or provide substantial additional sources of polluted runoff. Impacts would be less than significant. (iv) impede or redirect flood flows? Less than significant impact. The General Plan indicates that the project site is not located in a flood hazard zone as mapped by the Federal Emergency Management Agency (FEMA). 72 The nearest Special Flood Hazard Area is located adjacent to I-680, 0.29 miles east of the project site.73 Additionally, the project site is not in a dam inundation area.74 As discussed above, the proposed project would include BMPs such as minimization of impervious areas and bioretention treatment areas, in compliance with Municipal Regional Permit Provision C.3 guidance. Therefore, the proposed project would not impede or redirect flood flows and would not expose people or structures to significant risks involving flooding. Impacts would be less than significant. d) In flood hazard, tsunami, or seiche zones, risk release of pollutants due to project inundation? No impact. As previously discussed, the General Plan indicates that the project site is not located in a flood hazard zone as mapped by FEMA. 75 The nearest Special Flood Hazard Area is located adjacent to I-680, 0.29 mile east of the project site.76 Additionally, the project site is not in a dam inundation area.77 The nearest tsunami inundation zone as mapped by the California Emergency 72 City of Pleasanton. 2009. Pleasanton General Plan 2005-2025, Chapter 5, Public Safety Element, Figure 5-7, Flood Hazard Zones. Website: https://www.cityofpleasantonca.gov/civicax/filebank/blobdload.aspx?BlobID=23899. Accessed February 2, 2021. 73 Federal Emergency Management Agency (FEMA). 2020. FEMA Flood Map Service Center. Website: https://msc.fema.gov/portal/search?AddressQuery=2391%20Moorpark%20Avenue%2C%20San%20Jose%2C%20CA#searchresultsa nchor. Accessed February 2, 2021. 74 City of Pleasanton. 2009. Pleasanton General Plan 2005-2025, Chapter 5, Public Safety Element, Figure 5-8, Del Valle Dam Inundation Area. Website: https://www.cityofpleasantonca.gov/civicax/filebank/blobdload.aspx?BlobID=23899. Accessed February 2, 2021. 75 City of Pleasanton. 2009. Pleasanton General Plan 2005-2025, Chapter 5, Public Safety Element, Figure 5-7, Flood Hazard Zones. Website: https://www.cityofpleasantonca.gov/civicax/filebank/blobdload.aspx?BlobID=23899. Accessed February 2, 2021. 76 Federal Emergency Management Agency (FEMA). 2020. FEMA Flood Map Service Center. Website: https://msc.fema.gov/portal/search?AddressQuery=2391%20Moorpark%20Avenue%2C%20San%20Jose%2C%20CA#searchresultsa nchor. Accessed February 2, 2021. 77 City of Pleasanton. 2009. Pleasanton General Plan 2005-2025, Chapter 5, Public Safety Element, Figure 5-8, Del Valle Dam Inundation Area. Website: https://www.cityofpleasantonca.gov/civicax/filebank/blobdload.aspx?BlobID=23899. Accessed February 2, 2021.