2019-040 - Mainplace Mall Transformation

Home Browse Search

City of Santa Ana Addendum to the MainPlace Mall Transformation Project Fashion Square Commercial Center Final EIR Table PSU-3: Estimated Wastewater Generation at Project Buildout Use Generation Rate Quantity Average Flow Rate Peak Flow Multi -family 190 gpd/unit 1,900 units 0.56 cfs 1.68 cfs Hotel 190 d/room 400 rooms 0.12 cfs 0.36 cfs Commercial 0.0125 cfs/acre 49.0 ac 0.61 cfs 1.83 cfs Total 1.29 cfs 3.87 cfs Source: Sanitary Sewer capacity Study, 1u1 a Wastewater generated on the Project site, with the exception of one parcel that generates 0.45 cfs, is conveyed to the existing 15-inch sewer line in Main Place Drive. The peak flow generated by buildout of the proposed Project would be 3.42 cfs at this discharge point, which is less than the allowable capacity of 3.63 cfs of the 15-inch sewer line. The remaining parcel would connect to the 15-inch drain at the 30-inch trunk line, which has an allowable capacity of 26.99 cfs which is greater than the estimated peak flow from the Project of 3.87 cfs. Therefore, the existing City sewer system would be able to accommodate the peak flow generated by the proposed Project. In addition, OCSD indicates that the 30-inch trunk line is running approximately half full, which provides capacity to meet the demands of the Project. Therefore, consistent with the 1983 EIR and 1996 Addendum, impacts related to sewer would be less than significant. No new impact would occur. Solid Waste Similar to the Originally Approved Plan, the proposed Project would result in an increased generation of solid waste that would be disposed of in landfills. Table PSU-4 compares the volume of solid waste that would be generated from the Originally Approved Plan, the Currently Entitled development, and the proposed Project based on the solid waste generation rates in the 1983. As shown, the proposed Project would result in 6.52 tons per day less solid waste than the Originally Approved Plan and 3.99 tons per day less solid waste than the Currently Entitled development. Thus, the Project would generate less solid waste related impacts than described in the 1983 EIR or under the conditions of the 1996 Addendum. In addition, the current recycling requirements require diversion of 50 percent of solid waste away from landfills. Therefore, the proposed Project would result in a 13.46 tons of solid waste per day being disposed of in landfills. After 2020, when the proposed Project would be operational, the State regulations per AB 341 will become effective, which will require diversion of 75 percent of solid waste from landfills. Thus, it is anticipated that solid waste landfill disposal from operation of the Project would be reduced to approximately 6.73 tons per day.