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<br /> <br />Bay Area Clean Water Agencies | City of San Leandro Final Report | 5 <br />2.3 Existing Flows and Loads <br />A data request was submitted to each POTW in December 2014 as a means to understand historical <br />plant performance and identify plants that are candidates for sidestream treatment. A summary of <br />the historical influent flows and loads for SLWPCP is shown in Table 2–2. <br />Table 2–2. Current Influent Flows and Loads (7/2011-6/2014) <br />Criteria Unit ADWF1,2 Average <br />Annual <br />Dry Season MM <br />(May 1 – Sept 30)1,3 <br />Year Round MM1,3 <br />Flow mgd 4.8 5.0 5.3 6.4 <br />BOD lb/d 22,200 21,900 25,000 29,100 <br />TSS lb/d 19,200 19,200 22,800 24,600 <br />Ammonia lb N/d 1,100 1,200 1,100 1,300 <br />Total Kjeldahl <br />Nitrogen (TKN) <br />lb N/d 2,100 2,300 2,100 2,500 <br />Total Phosphorus <br />(TP) <br />lb P/d 280 310 280 340 <br />Alkalinity4 lb CaCO3/d No Data No Data No Data No Data <br />BOD mg/L 549 521 570 549 <br />TSS mg/L 475 457 520 464 <br />Ammonia mg N/L 27 29 25 25 <br />TKN mg N/L 52 55 48 47 <br />TP mg P/L 6.9 7.4 6.4 6.4 <br />Alkalinity4 mg/L CaCO3 No Data No Data No Data No Data <br />1. ADWF = Average Dry Weather Flow and MM = Maximum Month. <br />2. ADWF is calculated as the average flow for the months of July, August, and September. <br />3. The dry season maximum month values are used to size facilities to treat dry season loads that operate year round; the year round <br />maximum month values are used to treat year round loads that operate year round. <br />4. Alkalinity data not available. <br />2.4 Future Nutrient Removal Projects <br />The SLWPCP recently completed two projects that have the potential to impact nutrient removal: <br />1. In 2013, they installed a new high-efficiency turbo blower for the activated sludge aeration <br />basin. <br />2. The flow equalization storage facility is in place and diurnal flow diversion tanks have started <br />up which should support a more stable and reliable process. <br />2.5 Pilot Testing <br />The SLWPCP has not pilot tested any technologies to reduce nutrient discharge loads.