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3_Exhibit C_ADDENDUM ONLY
City of Pleasanton
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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 />128 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 />less than significant and the proposed project would not result in a new or more severe adverse <br />impact that was not previously identified in the Prior EIR. <br />c) Drainage <br />i) Erosion or Siltation On-site or Off-site <br />Prior EIR Conclusions <br />The Prior EIR found that buildout of the Housing Element would involve construction activities, <br />which may disturb soils and result in alteration of site topography. However, it was determined that <br />compliance with the RWQCB NPDES Construction General Permit, which covers construction-related <br />erosion, would ensure that runoff from all sites would not worsen existing water quality <br />impairments, thereby indicating the sufficient control of erosion and siltation. The Prior EIR <br />identified that future individual development projects would comply with Goal 6 of the City’s Public <br />Facilities and Community Programs Element, which requires that development minimizes <br />stormwater runoff, and provision C.3 of the MRP, which would reduce impacts on erosion by <br />implementing measures such as construction BMPs, natural topography protection, and requiring <br />that stormwater facilities are maintained. Therefore, the Prior EIR concluded that buildout of the <br />Housing Element would have less than significant impacts with respect to on-site and off-site <br />erosion. <br />Analysis of Proposed Project <br />As required, the proposed project would comply with the ACCWP NPDES Permit and the RWQCB <br />Construction General Permit, both of which contain measures to minimize erosion. Because the <br />proposed project would disturb more than 1 acre of land, it would be required to implement erosion <br />and sedimentation control measures, such as a SWPPP, during construction and operation. In <br />addition, the proposed project would also be required to prepare and comply with Pleasanton <br />Municipal Code Chapter 9.14.080, Reduction of Pollutants in Stormwater, which states that all <br />construction activities must follow BMPs outlined in the most current CASQA construction BMP <br />manual in order to prevent any debris and dirt flowing into the City’s storm sewer system, and all <br />operations following construction must comply with project-specific guidelines or requirements <br />identified by the City’s operations services director.64 As such, the proposed project would not <br />introduce any new drainage impacts resulting in erosion or sedimentation not previously disclosed in <br />the Prior EIR. Impacts would continue to be less than significant, and no mitigation is necessary, <br />consistent with the Prior EIR. There are no proposed changes, new circumstances, or new <br />information that would cause new or more severe impacts. <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 /> <br />64 City of Pleasanton. 2022. Pleasanton Municipal Code, Chapter 9.14.080. Website: <br />https://library.qcode.us/lib/pleasanton_ca/pub/municipal_code/item/title_9-chapter_9_14-9_14_080? Accessed November 21, <br />2022.
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