I am putting together a SWPPP for a site that will have disturbed portions within 20' of a Surface Water. I have estimated the % removal efficiency as if I had retained a 50' natural buffer - 26%. Now I need to design BMPs capable of achieving equivalent sediment removal efficiency. I downloaded RUSLE and managed to input my site conditions and also modeled a silt fence. I have attached a copy of the results from RUSLE. My problem is I don't know how to interpret them. The results give numbers with units of tons per acre per year. I need to know the Percent Removal Efficiency suggested by the results. Can anyone help me determine the Percent Removal Efficiency suggested by the RUSLE results? Thank you!
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