2014-069 - Final Environmental Impact Report No. 2014-01

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HARBOR BLVD. MIXED USE TRANSIT CORRIDOR PLAN FINAL FIR CITY OF SANTA ANA 5. Environmental Analysis HYDROLOGY AND WATER QUALITY 5.7.7 Mitigation Measures Impact 5.7 -3 - -1 Prior to issuance of grading permits for future development projects in the Harbor Corridor Plan, applicants shall submit site - specific hydrology and hydraulic Studies to the Public Works Agency for review and approval. If existing facilities are not adequate to handle runoff generated by the proposed development, then the applicant shall construct storm drain improvements. T€-a�Storm drain upgrades shallearfftet be implemented prior to issuance of occupancy permits, , 7 -2 During the design of individual projects, applicants shall minimize impervious area by incorporating landscaped areas over substantial portions of a proposed project area. Furthermore, impervious areas shall be directly connected to landscaped areas or bioretention facilities to promote filtration and infiltration of stormwater. The nwhcan t must comply with the latest Orange County Model Water Quality Management Plan (WOMP. Impact 5.7 -4 - -3 Notice of Intent (NOI). Prior to the issuance of a grading permit for construction sites with a disturbed area of one or more acres, the project applicant shall provide the City Engineer with evidence that a NOI has been filed with the State Water Resources Control Board. Such evidence shall consist of a copy of the NOI stamped by the State Water Resources Control Board or Regional Water Quality Control Board, or a letter from either agency stating that the NOI has been filed. 7 -4 Storm Water Pollution Prevention Plan (SWPPP). Prior to the issuance of grading permits for construction sites with a disturbed area of one or more acres, the project applicant shall prepare a SWPPP that will: ■ Require implementation of best management practices (BMPs) designed with a goal of preventing a net increase in sediment load in stormwater discharges relative to preconstruction levels; ■ During the construction period, prohibit discbarges of stormwater or non -storm water at levels which would cause or contribute to an exceedance of applicable water quality standards contained in the Basin Plan; ■ Discuss in detail the BMPs planned for the project related to control of sediment and erosion, nonsediment pollutants, and potential pollutants in non -storm water discharges; ■ Describe post construction BMPs for the project; October 2014 Page 5.7 -29