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Bay Area Clean Water Agencies | City of San Leandro Final Report | 1 Executive Summary The City of San Leandro operates the City of San Leandro Water Pollution Control Plant (SLWPCP) which discharges to South San Francisco Bay. The plant has an average dry weather flow (ADWF) permitted capacity of 7.6 million gallons per day (mgd). A summary of the flows and loads for the current conditions, optimization, sidestream and upgrade strategies are presented in Table ES-1. Capital costs, operation and maintenance (O&M) costs and unit costs were developed for each strategy. Table ES-1. Summary of Costs and Load Reductions Parameter1 Unit1 Current Dry Season Current Year Round Opt. Dry Season3 Opt. Year Round3 Level 2 Dry Season3 Level 2 Year Round3 Level 3 Dry Season3 Level 3 Year Round3 Side- stream Design Flow mgd -- -- 4.8 5.2 7.6 8.1 7.6 8.1 -- Flow to Bay2 mgd 5.0 5.0 5.0 5.0 6.5 6.5 6.5 6.5 -- Nutrients to Bay (Average)2 Ammonia lb N/d 1,240 1,240 200 190 120 110 120 110 1,270 TN lb N/d 1,240 1,240 1,040 970 690 650 520 320 1,300 TP lb P/d 114 114 122 114 60 50 40 20 122 Costs4,5 Capital $ Mil -- -- 10.9 11.9 63 64 87 91 10.0 O&M PV $ Mil -- -- 3.4 4.3 31 35 39 44 9.8 Total PV $ Mil -- -- 14.3 16.2 94 99 126 135 19.8 Unit Costs6 Capital $/gpd -- -- 2.2 2.3 8.3 7.9 11.4 11.2 -- Total PV $/gpd -- -- 3.0 3.1 12.4 12.2 16.5 16.6 -- 1. mgd = million gallons per day; TN = Total Nitrogen; TP = Total Phosphorus; O&M = Operations and Maintenance; PV = Present Value. 2. The current flows and loads to the Bay are the average annual 2015 BACWA Nutrient Reduction Study Group Annual Report (data from 7/2012-6/2015). The reported flows and loads for optimization, upgrades, and sidestream represent average projected loads discharged to the Bay for the period of analysis (10-yr for optimization and 30-yr for upgrades and sidestream). 3. Dry Season = facilities sized for May 1 through September 30 loads but operate year round; year round = facilities sized for year round loads and operated year round. The sidestream facilities are sized for a year round loads and operated year round. 4. Costs are referenced to the ENR SF CCI for November 2017 at 12,015. Costs do not include changes in solids handling or changes in energy requirements in other unit processes. Level 3 costs are inclusive of facilities needed to meet Level 2. 5. PV is calculated based on a 2 percent discount rate for 30 years. 6. The unit load reduction cost was calculated by dividing the capital or total present value by the design flow.