NS-3075 - Uncodified Local AB 2011 Implementing Ordinance Revision

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ATTACHMENT Pursuant to AB 2011, a development project utilizing AB 2011 permit streamlining must develop to at least the maximum permitted by the local jurisdiction's land use plan or by default densities established by the law, whichever is greater. The capacities included in this analysis will utilize the minimum default densities established for Affordable (30 dwelling unit per acre) or Mixed -Income (30-80 dwelling units per acre) where the General Plan does not permit equal to or greater densities for the alternative sites. In cases where the General Plan permits higher densities than those specified in AB 2011, the General Plan permitted densities will be utilized. Since AB 2011 establishes minimum densities for permit streamlining qualification, this analysis will not include a "realistic capacity" analysis as Is typically found in housing elements. Rather, will rely on the AB 2011 minimum densities or the General Plan densities where they are greater in compliance with applicability requirements established in AB 2011. Site Infrastructure and Services Water and Sewer Infrastructure The City operates and maintains Santa Ana's sewer system, which serves the entire city and portions of Garden Grove and Orange. The City's sewer collection system consists of approximately 450 miles of sewer mains, including approximately 60 miles of Orange County Sanitation District (OCSD) regional trunk facilities within the city. The system operates largely by gravity and discharges at several locations into OCSD gravity trunk sewers for conveyance to OCSD Treatment Plant 1. The City's most recent Sewer Master Plan update was performed in December 2016, The 2016 Sewer Master Plan Update Final Report (SMP) was an update to a sewer capacity analysis performed in 2003. The 2016 SMP analyzed the age of the sewer infrastructure, and the capacity of the City's sewer collection system for existing and future peak -flow conditions under both dry and wet weather conditions. In addition, the 2016 SMP summarized the rankings of the condition of the sewer pipes/manholes and the recommended rehabilitation and replacement of these sewers. The results of the capacity analysis and condition assessment are summarized below. City Sewer Capacity The capacity of the City's sewer system was assessed for all major trunk lines with diameters ranging from 10 to 39 inches in size. In total, approximately 97 miles of City pipelines, 20 miles of OCSD trunk lines, and a total of 1,799 manholes were modelled. The capacity of the system was assessed for existing and future (2040) base flow scenarios in addition to peak wet -weather flows (PWWF) derived for a 10-year storm event. The SMP identified four areas of the City where sewer capacity deficiencies were identified. The most significant areas of potential wet weather capacity deficiencies are between Fairhaven Avenue and 17th Street running through Old Grand Street, to Santa Clara Avenue, and then onto Wright Street in the northeastern area of the city. In addition to the sewer capacity assessment, the City assessed the condition of its sewer system. The review identified several defects in the condition in the sewer system, primarily in the central part of the city, including the downtown area. This area is known to have older pipes compared to the outer neighborhoods and consequently has more defect issues. Capital improvement projects are prioritized to allocate available funds to critical projects based on risk of failure and level of impact to economic, social, and environment issues. Similar to many public agencies, Ordinance No. NS-3075