SU0015801 - Laserfiche WebLink

Home Browse Search

Executive Summary Level of Potential Impacts Significance Mitigation Measures HYDROLOGY AND WATER QUALITY IMPACT 4.10-1: Would the project violate any water quality Less than Implementation of Mitigation Measure GEO-1 would be required. standards or waste discharge requirements or otherwise substantially Significant Impact HYDRO-1: Hydrology and Hydraulics Study.The Applicant shall engage a degrade surface or groundwater quality? with Mitigation qualified practitioner or firm to prepare a comprehensive watershed hydrology Incorporated evaluation as well as a targeted analysis of hydraulic conditions within specific portions of the drainage conveyances in the Project site drainage area. This evaluation and analysis will address both existing conditions and proposed (i.e., after development)conditions. The results shall provide data of sufficient detail and quality to allow preparation of a Project Site Drainage Plan that will be implemented during construction of the Project and provide extended controls for facility operations. The Site Drainage Plan will include detention ponds to provide adequate control of stormwater runoff and channel armoring to prevent erosion at detention pond outlets and new drainage channels. IMPACT 4.10-2:Would the project substantially decrease Less than No mitigation required. groundwater supplies or interfere substantially with groundwater Significant Impact recharge such that the project may impede sustainable groundwater management of the basin? IMPACT 4.10-3: Would the project substantially alter the existing Less than Implementation of Mitigation Measures GEO-1 and HYDRO-1 would be required. drainage pattern of the site or area, including through the alteration of Significant Impact the course of a stream or river or through the addition of impervious with Mitigation surfaces, in a manner which would: Incorporated i) Result in substantial erosion or siltation on-or off-site? ii) Substantially increase the rate or amount of surface runoff in a manner which would result in flooding on-or off-site? iii) Create or contribute runoff water which would exceed the capacity of existing or planned stormwater drainage systems or provide substantial additional sources of polluted runoff? iv) Impede or redirect flood flows? IMPACT 4.10-4: Is the project in flood hazard,tsunami, or seiche No Impact No mitigation required. zones, risk release of pollutants due to the project inundation? IMPACT 4.10-5:Would the project conflict with or obstruct Less than Implementation of Mitigation Measure GEO-1 would be required. implementation of water quality control plan or sustainable Significant Impact groundwater management plan? with mitigation incorporated Griffith Energy Storage Project ES-27 Tetra Tech/SCH2022120675 Draft Environmental Impact Report August 2023