Laserfiche WebLink
<br />BARTLE WELLS ASSOCIATES 13 | Pag e <br /> City of San Leandro Draft 2024 Wastewater Rate Study <br />Table 4 – Strength Classifications <br /> <br /> <br />4.3 Flows and Loadings <br />The following tables estimate the flows and loadings of each customer class based on the following information: <br />• Residential flows per unit are based on the average household size in the City of San Leandro and the <br />median water use in California. <br />• Residential wastewater strength concentrations are based on estimates previously published by the State <br />Water Resources Control Board (SWRCB). Residential wastewater strength concentrations have increased <br />over the past decade as the volume of wastewater flow has decreased due to transition to low-flow toilets, <br />water-efficient appliances, and other water conservation and efficiency measures. <br />• Commercial wastewater flows are estimated based on projected water use and the estimated flow <br />returning to the sewer system. Wastewater strength assignments for commercial customer classes are <br />largely based on strength estimates previously published by the SWRCB. <br />o Commercial customers were classified between low, medium, and high strength. <br /> <br />The resulting flow and strength projections for each class are shown in the following tables and provide the basis <br />for allocating costs and deriving equitable wastewater rates for each customer class. <br /> <br />Strength Classifications into Low, Medium/Domestic, and High Strength Dischargers <br />Low Strength Schools <br />Medium/Commercial/Residential - All <br />Domestic Strength Auto Services <br />Laundries <br />Mixed Use <br />All Other <br />High Strength Bakery, Wholesale <br />Markets/Foods <br />Restaurants <br />Note: Wastewater users who have Fats, Oils, and Grease (FOG) waste will be put into the High <br />Strength user category.