31B - CUP - 1901 NORTH FAIRVIEW ST

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City of Santa Ana Environmental Checklist gutter drainages on 17th Street, which empties into a concrete -lined portion of the Santa Ana River channel and levee located south -east of the project site. The project's planned operational stormwater drainage for the central portion of the project site will direct surface flow to drain into a bioretention system that will treat stormwater. The treated stormwater will be discharged at four locations along North Fairview Street and join the existing drainage pattern of the street that will transport flows into the existing storm drain system in 17th Street. The remainder of the stormwater from the site will infiltrate into permeable pavers, with any overflow going to the existing curb and gutter. The project does not include changes to the existing offsite drainage patterns as a result of the proposed project. The project would not Because of the project would slightly reduce impervious surfaces and add the bioretention system, the existing stormwater infrastructure will be able to continue to accommodate stormwater flows from the project site. As a result, new or expanded drainage facilities beyond those included onsite as part of the project would not be required to accommodate the proposed project, and impacts are less than significant. d. Have sufficient water- supplies available to serve the project fi-orn existing entitlements and resources, or would new or expanded entitlements be needed? Less - than - Significant impact. Domestic water for the proposed project would be provided by the Water Resources Division of the City of Santa Ana Public Works Agency. In 2010, the City of Santa Ana received 62% of its water from the Orange County Groundwater Basin, which is delivered to the City by the OCWD. The remaining 38% is imported water that was purchased from Metropolitan (City of Santa Ana 2010). The City also receives recycled water after advanced treatment from the OCW D facility, Green Acres Project. These recycled supplies can offset the demand for potable water supplies. Water use and availability is detailed in Urban Water Management Plans (UWMPs), which are required to be updated every 5 years to provide estimates of current water usage and typically project water use over a 25- to 30 -year period. Santa Ana's most recent UWMP was prepared and adopted in November 2005. At that time, the City maintained 444 miles of transmission and distribution mains, 8 reservoirs with a storage capacity of 49.3 million gallons, 7 pumping stations, 19 wells, and 7 import connections. Also, the amount of annual water use for the 2005 fiscal year was 44,920 acre -feet a year (afy), which was below the available 48,722 afy of supply for that year. Table 3 -29 shows the UWMP's projected supply and demand until 2030 for normal and single -dry water years, as well as multiple dry years for the following five year periods: 2011 -2015, 2016- 2020, 2021 -2025, and 2025 -2030. As shown in Table 3 -29, the City of Santa Ana is projected to have a water surplus each reporting year. The smallest surplus for the City is projected to occur during a single dry water year for 2030, which is estimated at 2,460 afy. As shown above in Table 3 -28, the proposed project will require 25,992 gallons per day (gpd) of water at full operating capacity of Phase 11, which is 43.4% less than the amount of water that was used daily by the previous medical uses on the site. Further, the project could only utilize this maximum water flow on school days. As provided in the project description, the school is anticipated to operate on a traditional school calendar of 184, generally operating from September through mid -June. As a result, the annual demand for water supplies by the school facilities would be further reduced, in comparison to annual demands by the previous land use. The Academy Charter High School 3 -106 June 2012 Initial Study /Mitigated Negative Declaration ICF00914.11 96111