Examples of the estimated pollutant load reductions for a stormwater reuse storage system sized for the average storm event runoff volume Examples of the estimated pollutant load reductions for a stormwater reuse storage system sized for the average storm event runoff volume

Examples of the estimated pollutant load reductions for a stormwater reuse storage system sized for the average storm event runoff volume
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Hydrologic Soil Group (HSG)	Watershed Area (acre)	Watershed Imperviousness (%)	Average Annual Runoff Volume Reduction1,2(%)	Average Annual TSS Reduction Reuse Only3(%)	Average Annual TP Reduction Reuse Only3(%)	Average Annual TSS Reduction NURP & Reuse3,4(%)	Average Annual TP Reduction NURP & Reuse3,4(%)
B	10	10	21.4	21.4	21.4	87.4	60.7
		30	26.4	26.4	26.4	88.2	63.2
		50	24.0	24.0	24.0	87.8	62.0
		70	21.9	21.9	21.9	87.5	61.0
		90	21.3	21.3	21.3	87.4	60.7

1 - Based on 50-year P8 model run from January 1, 1955 through December 31, 2004 utilizing MSP climate data
2 - Assumes stormwater storage volume for reuse equivalent to the average storm event runoff volume and that the application area is sufficient to handle an irrigation application rate of 1"/week over the application area & irrigation period from May through September
3 – Assumes pollutant removal equivalent to volume reduction for reuse only
4 - Assumes average annual NURP pond removal: TP=50%, TSS=84%.