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ARROYO LAGO RESIDENTIAL PROJECT ADDENDUM 120 FCS Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480036/Addendum/21480036 Arroyo Lago Residential Project Addendum.docx To assess whether the proposed project’s emissions would result in a significant impact, the proposed project is evaluated for consistency with the City’s CAP 2.0. As shown in the proposed project’s CAP 2.0 checklist (Appendix B), the proposed project would incorporate most applicable measures required under CAP 2.0; however, the proposed project would not include two listed features: (1) an all-electric building design and (2) a battery-storage system to support on-site solar generation. Because the proposed project does not comply with all applicable listed CAP 2.0 measures, it is considered inconsistent with CAP 2.0. Accordingly, the proposed project would result in a significant and unavoidable GHG impact, consistent with the impact conclusions set forth in the Prior FEIR. The proposed project would nevertheless be required to comply with the applicable 2022 CALGreen Code and Title 24 Building Energy Efficiency Standards, which, among other things, mandate high- efficiency plumbing fixtures, water-efficient irrigation systems, and compliance with current energy efficiency performance standards. Compliance with these State-level codes ensures consistency with applicable State and federal plans, policies, and regulations that govern GHG emissions. Despite compliance with these Statewide requirements and the proposed project’s compliance with most of the City’s CAP 2.0 applicable measures, because the proposed project does not include two of the above-referenced measures, it would be treated as inconsistent with the City’s CAP 2.0 for purposes of this GHG assessment. Therefore, its GHG emissions impact would continue to be significant and unavoidable. Consistent with the Prior FEIR’s analysis of the County Project, the proposed project would implement MM GHG-1 and MM GHG-2 to reduce GHG emissions to the extent feasible. Therefore, the proposed project would not introduce new significant impacts or create substantially more severe significant impacts than those previously identified in the Prior FEIR. No additional analysis is required. Zone 7 Stormwater Option The Zone 7 Stormwater Option would not result in any new or more severe greenhouse gas emissions since it was previously considered in the Prior FEIR. Moreover, because it would eliminate construction and operation of the detention basin, pump facilities, and storm drain force main (as contemplated by the City Stormwater Option), this would reduce construction-related emissions as compared to the City Stormwater Option without altering the project’s long-term operational GHG profile. Mitigation Measures MM GHG-1 Prior to issuance of building permits, the project applicant shall provide documentation (e.g., site plan) to the County to demonstrate that the proposed residential units would include pre-wiring so that each building is ready for a future retrofit to all-electric (e.g., such that electric space heating, water heating, drying, and cooking appliances) could be installed.