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City of Santa Ana <br />Discussion <br />Existing Condition <br />Environmental Checklist <br />Watersheds are typically areas that drain to a single point or receiving water (any watercourse or <br />wetland into which surface water flows). The project site is located in the Santa Ana River <br />watershed which is underlain by the southwest portion of the Coastal Plain of Orange County <br />Groundwater Basin. Stormwater sheet flows over the project site into the existing 6-inch curb and <br />gutter along the east side of Sullivan Street, and does not connect to a storm drain system or <br />discharge directly into a receiving water body. From Sullivan Street stormwater travels south to <br />McFadden Avenue and east into an existing Orange County Flood Control drain that is located near <br />Jerome Park on McFadden Avenue (OCFCD 2008). This regional drain conveys Stormwater that <br />outlets into the Anaheim Bay/Huntington Harbor. Anaheim Bay is included on the State Water <br />Quality Control Board (SWQCB) 303(d) of impaired water bodies for pesticides and heavy metals. <br />Huntington Harbor is on the 303 (d) list for pathogens, metals, and pesticides. <br />The Santa Ana RWQCB has adopted a basin plan for its region of responsibility, which includes the <br />City of Santa Ana and the Anaheim Bay. The basin plan contains water quality objectives, which <br />includes implementation of numeric Total Maximum Daily Loads (TMDLS) in 2019 for the <br />constituents that impair a water body. The TMDL is the total amount of a constituent that can be <br />discharged while meeting water, quality objectives and protecting beneficial uses. Because the <br />Anaheim Bay is impaired, and project-specific water quality plans (such as WQMP and SWPPP) <br />would be requited by the Santa Ana RWQCB to meet the TMDL requirements of this water body. <br />Would the project: <br />a. Violate any water quality standards or waste discharge requfrements7 <br />Less-than-Significant Impact with Mitigation Incorporated. The proposed project could <br />potentially result in impacts on water quality from both construction and operation, which are <br />discussed separately below. <br />Construction Impacts <br />The potential impacts of construction activities on water quality focus primarily on sediments, <br />turbidity, and pollutants associated with sediments. Construction-related activities that expose and <br />move soils are primarily responsible for sediment releases. The project includes removal of existing <br />concrete, buildings, and vegetation. In addition, site grading, soil preparation, and site trenching will <br />expose soils. These project activities could result in wind and rain erosion of the existing onsite soils <br />and could increase the amount of suspended solids contained in storm flows due to erosion of <br />exposed soils during construction. Non-sediment potential contaminants that could enter water <br />runoff from the construction site include paints, solvents, metals, oil, gasoline, petrolewn products, <br />concrete-related products, chemicals, and trash. All of these contaminants could contribute to the <br />degradation of water quality. <br />Because the project would disturb over one acre of land, the proposed project is subject to the <br />General Construction Permit. The General Construction Permit, which was adopted by the SWRCB as <br />Water Quality Order 99.08-DWQ on August 19, 1999, is required for soil disturbance activities that <br />would be greater than one acre. Compliance with the General Construction Permit requires the <br />development and implementation of a Storm Water Pollution Prevention Plan (SWPPP), the <br />The Bat Nha Buddhist Meditation Center 3 52 June 2013 <br />Initial Study/Mltigated Negative Declaration ICF 00215.12 <br />31 C-105 <br />