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 5.14 UTILITIES AND SERVICE SYSTEMS This section of the Draft EIR analyzes the proposed project's potential impacts to utilities and service systems, including water providers and infrastructure, wastewater infrastructure and treatment systems, and solid waste landfills. The analysis in this section is based, in part, on the following technical reports: • Harbor Boulevard Mixed Use Transit Corridor Abater Study, IBI Group, July 12, 2013 • Harbor Boulevard Mixed Use Transit Corridor Sewer Study, IBI Group, March 25, 2014 • Abater SuppAAssessment Harbor Boulevard Mviced Use Transit Corridor far City of Santa Ana, April 2014 A complete copy of these reports is included in Appendix J of this EIR. 5.14.1 Environmental Setting 5.14.1.1 WATER SUPPLY AND DISTRIBUTION SYSTEMS Water Supplies The City of Santa Ana Water Resources Division (WRD) supplies water to the City including the project area. The WRD has two main sources of water: groundwater from the Main Orange County Groundwater Basin; and surface water from northern California and the Colorado River imported by the Metropolitan Water District of Southern California (MWD). Groundwater comprises about 62 percent of total City water supplies; imported water about 38 percent; and recycled water about 0.4 percent; those proportions are expected to remain about the same through 2035. Groundwater Most of northern and central Orange County, including Santa Ana, overlie the Main Orange County Groundwater Basin (`Basin". Groundwater in the Basin is managed by the Orange County Water District (OCWD). The City produces groundwater through 20 wells; groundwater production in 2009, the latest year for which data are available, was 28,894 acre -feet' The fraction of each groundwater producer's total water supply that the producer is allowed to obtain through groundwater from the Basin, the Basin Production Percentage, is set by the OCWD. The Basin Production Percentage was 62 percent in the 2010 -2011 water year; and is assumed to be 62 percent throughout the 2010 -2035 planning period of the City's 2010 Urban Water Management Plan. Water quality in the Basin is not expected to constrain groundwater supplies available to the City. Groundwa ter Rechasge The OCWD owns and operates a network of recharge facilities covering 1,067 acres. Water is recharged into the Basin to control seawater intrusion into the Basin as well as to provide part of municipal water supplies in OCWD's service area. The Groundwater Replenishment System, with capacity to treat 72 million gallons per day (mgd) of wastewater for groundwater recharge, is the largest facility of its kind. r 1 acre -foot is about 325,851 gallons. October 2014 Page 5.7¢7