Capitol Hill Water Quality Project - Water Year 2020 Monitoring
Reference:
Herrera. 2020. Capitol Hill Water Quality Project – Water Year 2020 Monitoring. Prepared for Seattle Public Utilities, by Herrera Environmental Consultants, Inc., Seattle, Washington.
The CHWQP is a regional biofilter located in Seattle, Washington that was designed to treat 153 Mgal of stormwater annually. One of the three monitored biofilter blocks was configured with a polishing layer to reduce phosphorus export from the compost-based filter media. The biofilter with polishing layer reduced influent TP concentrations by an average of 75.8 percent. TP reductions were -58.4 and 27.6 for the two biofilters without polishing layers. This is the first full-scale field test of a polishing layer to reduce TP export from a compost-based biofilter.
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The CHWQP is a regional biofilter located in Seattle, Washington that was designed to treat 153 Mgal of stormwater annually. One of the three monitored biofilter blocks was configured with a polishing layer to reduce phosphorus export from the compost-based filter media. The biofilter with polishing layer reduced influent TP concentrations by an average of 75.8 percent. TP reductions were -58.4 and 27.6 for the two biofilters without polishing layers. This is the first full-scale field test of a polishing layer to reduce TP export from a compost-based biofilter
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The CHWQP is a regional biofilter located in Seattle, Washington that was designed to treat 153 Mgal of stormwater annually. One of the three monitored biofilter blocks was configured with a polishing layer to reduce phosphorus export from the compost-based filter media. The biofilter with polishing layer reduced influent TP concentrations by an average of 75.8 percent. TP reductions were -58.4 and 27.6 for the two biofilters without polishing layers. This is the first full-scale field test of a polishing layer to reduce TP export from a compost-based biofilter