3_Exhibit C_ADDENDUM ONLY - Laserfiche WebLink

City of Pleasanton—Stoneridge Mall Residential Project CEQA Checklist Section 15183 Checklist/15164 Addendum 176 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 City developed a Condition of Approval in the 2011 Water Supply Assessment (WSA) for residential development, which is included in the Prior EIR and herein as MM 4.L-2, which requires written verification from Zone 7 Water Agency or the City of Pleasanton’s Utility Planning Division that water is available for a project. With inclusion of MM 4.L-2, it was determined that there would be a less than significant impact on water facilities. Section 4.H Hydrology and Water Quality in the Prior EIR also determined that increased urban development as part of General Plan buildout could increase stormwater generation and the need for stormwater drainage facilities. However, implementation of standard construction measures and BMPs would reduce impacts to stormwater infrastructure and facilities to a less than significant level. Additionally, the Prior EIR concluded that buildout would not create a level of wastewater discharge that would exceed the 8.5 million gallons per day (mgd) capacity for wastewater allotted to the City by the DSRSD. The Prior EIR found that the City would also expand its capacity in the discharge system which is managed by the Livermore-Amador Valley Water Management Agency, allowing for an additional 6.9 mgd of additional wastewater treatment capacity during wet-weather discharge. Finally, the Prior EIR concluded that implementation of General Plan Programs 1.1, 1.2, 1.3, 1.5, 1.7, 1.8, 1.12, 1.13, and 1.14 would further reduce impacts on water supplies by promoting water conservation, requiring new development fees, and water recycling. As a result, new housing development facilitated by the Housing Element would not exceed the allocated capacity for the City and wastewater would be treated without the construction of new facilities. Analysis of Proposed Project Water Facilities The proposed project would include a new potable water line which would connect to the existing potable water line located in Stoneridge Mall Road. A Hydraulic Analysis was prepared for the proposed project by AKEL Engineering Group, Inc., dated December 2022. The Hydraulic Analysis evaluated whether the proposed infrastructure would adhere to the City’s design criteria for pipeline velocities and system pressures. The Hydraulic Analysis determined that the proposed project would have minimal impacts to system pressure, and system pressure would be maintained well above the City’s criteria of 40 psi. The proposed project’s planned pipeline realignments would be adequate to meet a 2,500 gpm fire flow at each hydrant location. The existing system pipelines only saw a minor increase in velocities with the addition of the proposed project, and no additional system pipeline improvements are recommended. The proposed project would increase the storage requirement in the Lower Pressure Zone by approximately 0.10 million gallons and would not result in any impacts to pump stations. The proposed number of units, and therefore, the increase in water demand, has been accounted for as part of planned development under the Prior EIR. As such, water demand for the project site was included in the Zone 7 Water Agency water supply plans, including the 2020 UWMP. The Prior EIR concluded that implementation of General Plan Program 4.1, would further reduce impacts on water facilities by requiring new development fees (capital facilities and connection fees). As a result,