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City of Santa Ana <br />California Environmental Quality Act <br />Initial Study/Mitigated Negative Declaration <br />regulations. BMPs will be implemented to mitigate potential impacts from machinery and <br />contaminants. During construction, silt fencing or other sediment control BMPs will be installed <br />around the perimeter of the site to prevent sediment from leaving the Project area. In addition, <br />gravel bags, plastic covers, erosion control blankets, and other erosion control BMPs will be applied in <br />accordance with the Project's erosion control plan. In the event of a hazardous materials spill, it will <br />be immediately reported to the appropriate public agencies, including the City, U.S. Army Corps of <br />Engineers (USACE), SARWQCB, and California Department of Fish and Wildlife (CDFW). As a result, <br />impacts to water quality are anticipated to be less than significant. <br />b) Groundwater supplies will not be impacted, as the Project does not involve the installation of <br />groundwater wells and does not increase groundwater demand. Further, the Project will enhance <br />water supply through groundwater recharge using infiltration systems. Therefore, no impacts are <br />anticipated. <br />c) <br />The Project will not result in substantial erosion or siltation on- or off -site as it will not <br />alter existing drainage patterns. As noted in Section 3.10(a), construction BMPs will be <br />implemented to prevent erosion or siltation during construction. Therefore, impacts are <br />expected to be less than significant. <br />ii. The Project will not substantially increase surface runoff or significantly raise the <br />imperviousness of the site, which could potentially lead to flooding on or off -site. <br />Therefore, impacts are anticipated to be less than significant. <br />iii. Although additional parking spaces will be provided in the overflow parking lot to <br />compensate for the loss of parking due to the addition of the pocket park, there will be <br />no net increase in impervious surfaces. As a result, no significant impacts are <br />anticipated. <br />iv. The Project will be constructed outside of any waterbodies and is not expected to impede <br />or redirect flood flows. Since no work will occur within a channel, no impacts on flood <br />flow patterns are anticipated. <br />d) The proposed Project is not located within a flood hazard zone or seiche zone. According to the <br />Federal Emergency Management Agency (FEMA), the Project area is located in Zone X, which is <br />outside of the 0.2% annual chance flood area. The Project site is approximately 10 miles northeast <br />of the Pacific Ocean and is situated 129 feet above sea level. Consequently, flooding and seiche- <br />related impacts are anticipated to be less than significant. <br />e) The Project will not conflict with the Santa Ana River Basin Plan for the Upper and Lower Santa Ana <br />River watersheds, the San Jacinto River Watershed, or other smaller drainage areas. All new <br />developments are required to implement site design measures and BMPs to protect water quality and <br />maintain natural drainage systems. Therefore, no impacts to water quality or drainage are <br />anticipated. <br />-28CWE7 <br />- <br />