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 UTILITIES AND SERVICE SYSTEM demand due to project buildout. The project would not require SCGC to obtain new or expanded natural gas supplies beyond its existing and forecast supplies. Impacts would be less than significant. Table 5.14 -14 Estimated Natural Gas Demands by Harbor Corridor Plan Buildout Scenario Natural Gas Demands, kBTU per Yearr Existing Conditions 32,918,190 Harbor Corridor Plan Buildout Existing Land Uses to Remain 9,666,735 Future Land Uses 45,521,430 Total 55,188,165 Netlncrease 22,269,975 1 1 kBTU (that is, 1,000 BTU) is equivalent b 0.971 cubic foot d natural gas. 5.14.4 Cumulative Impacts Water Supplies Cumulative impacts on water supplies are considered for the City's water provider, MWD and OCWD. Water providers are required to prepare plans to ensure adequate water supplies exist for future growth. According to the WSA prepared for the project, MWD and OCWD have adequate water supplies to meet demands in the City between 2015 and 2035 in normal year, single- dry-year, and multiple- dry -year conditions. In addition, implementation of demand management measures in future projects and water shortage contingency plans would further reduce additional water demand. No significant cumulative impact would occur, and buildout of the Harbor Corridor Plan would not contribute to a cumulative impact on water supplies. Wastewater Treatment Cumulative impacts on wastewater treatment are considered for the Orange County Sanitation District (OCSD)'s service area, which is most of north and central Orange County (from the City of Irvine north and west to the County boundaries). OCSD's service area is similar to eight combined Regional Statistical Areas (RSAs) used in the Orange County Projections 2010 by the Center for Demographic Research at California State University Fullerton.3 Estimated total net increases in population and employment in the eight RSAs between 2010 and 2035 from the Orange County Projections 2010 Modified are 317,515 and 245,859, respectively (CDR 2012). Current remaining capacity for primary treatment at Reclamation Plant No. 2 is 17 mgd; expansion of secondary treatment capacity at that facility by 60 mgd is under construction. OCSD is expected to have adequate wastewater treatment capacity for wastewater generation by cumulative developments in its service area. No significant cumulative impact is anticipated, and buildout of the Harbor Corridor Plan would not contribute to a significant cumulative impact. Storm Drainage Cumulative impacts on storm drainage are considered for the City of Santa Ana, as all of the proposed drain pipe upgrades needed to accommodate project generated increases in drainage (as well as to remedy existing 3 The Regional Statistical Areas are A -36, B -41, E -44, F -39, G -42, H-37,1-38, and J -35. October 2014 Page 5.14 -21