3_Exhibit C_ADDENDUM ONLY - Laserfiche WebLink

City of Pleasanton—Stoneridge Mall Residential Project CEQA Checklist Section 15183 Checklist/15164 Addendum 100 FirstCarbon Solutions Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480017/Consistency Checklist/21480017 Stoneridge Mall Residential Project Checklist Addendum_Updated.docx b) Erosion Prior EIR Conclusions The Prior EIR noted that potential sites for rezoning greater than one acre would be required to adhere to the National Pollutant Discharge Elimination System (NPDES) General Construction Permit which contains requirements for erosion control of exposed soils. In addition, the Housing Element found that implementation of nonpoint source control of stormwater runoff through the application of Best Management Practices (BMPs), described in the Storm Water Pollution Prevention Plan (SWPPP) would be required. It was determined that the General Plan Public Safety Element Goal 1, Policy 2, and Goal 2, Policy 5, mitigate and minimize the risk of soil erosion and its effects. Therefore, the Prior EIR found that the impacts related to soil erosion would be less than significant. Analysis of Proposed Project As discussed above, the proposed project would be required to implement General Plan Public Safety Element Goal 1, Policy 2, and Goal 2, Policy 5 to mitigate and minimize the risk of soil erosion and its effects. In addition, the proposed project would adhere to the NPDES General Construction Permit which contains requirements for erosion control of exposed soils, through the application of BMPs from the project-specific SWPPP. Impacts would continue to be less than significant, and no mitigation is necessary, consistent with the Prior EIR. There are no proposed changes, new circumstances, or new information that would cause new or more severe impacts. Therefore, there are no environmental effects that are peculiar to the proposed project or the parcels on which the proposed project would be located. Impacts would be less than significant and the proposed project would not result in a new or more severe adverse impact that was not previously identified in the Prior EIR. c) Unstable Soils or Geologic Units Prior EIR Conclusions The Prior EIR concluded that that impacts related to unstable geologic units could occur throughout the City including subsidence, landslides, and liquefaction. Goal 2, Policies 5 and 7 in the General Plan Public Safety Element describes policies that reduce the risk of settlement, subsidence and lateral spreading to a less than significant level. Analysis of Proposed Project As described above, the project site does not contain landslide or liquefaction risks beyond what was concluded in the Prior EIR. Lateral spreading occurs when a continuous layer of soil liquefies at depth and the soil layers above move toward an unsupported face, such as a shoreline slope, or in the direction of a regional slope or gradient. Based on the prevalent cohesive soils located above groundwater and the depth of groundwater, the Geotechnical Engineering Report considered the risk of lateral spreading to be low.50 Consistent with the Prior EIR, the proposed project would be 50 Terracon Consultants. 2014. Geotechnical Engineering Report – 1 Stoneridge Mall Road. October 13.