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Influent Parameter Concentrations, Mass Loading Values, and Influent Flow Values for Evaluating Operations During Dry Weather Flows at California Wastewater Treatment Facilities
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|Created:||May 17, 2022 at 4:09 p.m.|
|Last updated:|| May 17, 2022 at 4:47 p.m.
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Wastewater treatment facilities must manage water quality during both average flow and extreme events, including wet and dry weather periods. Constituent concentrations can increase during dry weather flow events, since facilities experience reduced incidental infiltration and influent flows may be lower as a result. A script was developed using self-reported data taken from the California Integrated Water Quality System Project (CIWQS) to clean, filter, and organize a batch dataset of influent flows, constituent concentrations, and constituent mass loadings from California wastewater treatment facilities. The script develops two summary data sheets for each facility: one that contains total suspended solids (TSS) data and one that contains biochemical oxygen demand (BOD) data. Data from 426 wastewater treatment facilities was accessed through CIWQS. 104 facilities had adequate BOD data and 105 facilities had adequate TSS data. These summary sheets can be used to quickly assess an individual facility’s dry weather or baseline influent flows. A separate script uses these sheets to prepare a composite summary of BOD, TSS, and influent flow during recent drought-related water use restrictions and the following period of eased restrictions.
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