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HYD-5 Conflict with or obstruct implementation of a water quality control plan or sustainable <br />groundwater management plan? <br />Summary of Impacts in the GP EIR <br />As discussed in detail in Section 5.9, Hydrology and Water Quality, of the GP EIR, the Approved Project would <br />involve disturbance, construction, and operation of land uses that could generate pollutants affecting <br />stormwater. However, the Approved Project would comply with RRs HYD-1 through HYD-5 and implement <br />GP policies (Policy 1.7 of the Safety Element, Policy 3.5 of the Public Services Element, and Policy 4.6 of the <br />Conservation Element) to reduce impacts on water quality (GP EIR p. 5.9-29-5.9-32). The GP EIR determined <br />that impacts would be less than significant. <br />The GP EIR determined that the Approved Project would increase the demand on groundwater use but not <br />interfere with groundwater recharge or management (GP EIR p. 5.9-33). The GP EIR determined that impacts <br />would be less than significant. <br />The GP EIR identified that portions of the City are within inundation areas for the Santiago Creek Dam and <br />Prado Dam; however, impacts due to inundation by the Santiago Creek Dam and Prado Dam were determined <br />to be less than significant. (GP EIR p. 5.9-35-5.9-36). Additionally, the GP EIR identified that impacts due to <br />seiche would be less than significant for dam inundation areas, and impacts of a tsunami would be negligible. <br />(GP EIR p. 5.9-36). The GP EIR determined that with compliance with RR HYD-6 and GP policies, impacts <br />would he less than significant. <br />The GP EIR determined that the Approved Project would maintain the existing drainage pattern and utilize <br />existing drainage facilities within the public rights -of -way. Additionally, the GP EIR identified that the city is <br />mostly built out apart from a small number of lots that will be developed under Approved Project conditions <br />(GP EIR 5.9-32). The GP EIR determined that impacts related to alteration of existing drainage patterns or <br />streams would he less than significant. <br />The GP EIR determined that the Approved Project would comply with applicable regulatory requirements that <br />would ensure surface and groundwater quality are not adversely impacted. Additionally, the GP EIR identified <br />that new development under the Approved Project would connect to the City's public water supply, and there <br />would be no use of on -site wells for groundwater. The GP EIR determined that the increase in water demand <br />due to development pursuant to the GP would not adversely impact the management of the basin (GP EIR p. <br />5.9-37). The GP EIR determined that with compliance with RRs HYD-1 through HYD-5 and implementation <br />of GP policies, impacts would be less than significant. <br />Analysis of the Modified Project <br />The Modified Project would expressly prohibit STRs and only affect existing structures. It would not result in <br />development, redevelopment, or changes to existing development types in the city. The existing conditions <br />related to hydrology and water quality have not changed since the certification of the GP EIR. The Modified <br />Project is not anticipated to result in any physical impacts on the environment. The operational water demand <br />under the Modified Project would be consistent with the water demand analyzed in the GP EIR for residential <br />Resolution No. 2024-072 <br />Page 46 of 67 <br />