Appendix A Water Quality Memo - Laserfiche WebLink

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22 5.0 AVOIDANCE, MINIMIZATION, AND/OR MITIGATION MEASURES The following regulatory requirements would be implemented as project design features and would reduce or avoid impacts to water quality: Measure WQ-1: Construction General Permit. Prior to commencement of construction activities, the City of Santa Ana shall obtain coverage under the National Pollutant Discharge Elimination System (NPDES) General Permit for Storm Water Discharges Associated with Construction and Land Disturbance Activities (Construction General Permit) NPDES No. CAS000002, Order No. 2009-0009-DWQ, as amended by Order No. 2010-0014-DWQ and Order No. 2012-0006-DWQ, or any other subsequent permit. This shall include submission of Permit Registration Documents (PRDs), including permit application fees, a Notice of Intent (NOI), and other compliance-related documents required by the permit, to the State Water Resources Control Board via the Storm Water Multiple Application and Report Tracking System (SMARTS). Construction activities shall not commence until a Waste Discharge Identification Number (WDID) is obtained for the project from SMARTS. Project construction shall comply with all applicable requirements specified in the Construction General Permit, including but not limited to, preparation of a Storm Water Pollution Prevention Plan (SWPPP) and implementation of construction site best management practices (BMPs) to address all construction-related activities, equipment, and materials that have the potential to impact water quality for the appropriate risk level identified for the project. The SWPPP shall identify the sources of pollutants that may affect the quality of stormwater and shall include BMPs, such Sediment Control, Erosion Control, and Good Housekeeping BMPs, to control the pollutants in stormwater runoff. Construction Site BMPs shall also confirm to the requirements specified in the latest edition of the Orange County Stormwater Program Construction Runoff Guidance Manual for Contractors, Project Owners, and Developers to control and minimize the impacts of construction and construction-related activities, materials, and pollutants on the watershed. Upon completion of construction activities and stabilization of the site, a Notice of Termination (NOT) shall be submitted via SMARTS. Measure WQ-2: Groundwater Dewatering Permit. If groundwater dewatering is required during construction, the City of Santa Ana shall obtain coverage under the General Waste Discharge Requirements for Discharges to Surface Waters that Pose an Insignificant (De Minimus) Threat to Water Quality (Order No. R8-2009-0003, NPDES No. CAG998001), or any subsequent permit. This shall include submission of a Notice of Intent (NOI) for coverage under the permit to the Santa Ana Regional Water Quality Control Board (RWQCB) at least 45 days prior to the start of dewatering. Groundwater dewatering activities shall comply all applicable provisions in the permit, including water sampling, analysis, treatment (if required), and reporting of dewatering-related discharges. Upon completion of groundwater dewatering activities, a Notice of Termination (NOT) shall be submitted to the Santa Ana RWQCB. Measure WQ-3: Water Quality Management Plan. During the final design phase, the City of Santa Ana shall insure that a Final Water Quality Management Plan (WQMP) be prepared for the project in compliance with the Waste Discharge Requirements for the County of Orange, Orange County Flood Control District and the Incorporated Cities of Orange County within the Santa Ana Region Areawide Urban Storm Water Runoff Orange County (North Orange County MS4 Permit), Order R8-2009-0030, NPDES No. CAS618030 (as amended by Order No. R8-2010-0062). The Final WQMP shall be prepared consistent with the requirements of the Model Water Quality Management Plan (WQMP) (2011) and Technical Guidance Document for the Preparation of Conceptual/Preliminary and/or Project Water Quality Management Plans (WQMPs) (TGD; 2013), or subsequent guidance manuals. The Final WQMP