Median concentrations of Total Suspended Solids (TSS) in untreated stormwater and oil and grit separator (OGS) outlet locations were found to typically exceed 30 mg/L. Median TSS concentrations at stormwater detention pond and chamber system outlet locations was found to be below 30 mg/L, but exceeded the guideline value in 36% of the monitored storm events. Median TSS concentrations at bioretention, permeable pavement and infiltration trench outlet locations were found to be all below 30 mg/L. TSS concentrations in effluent from bioretention was found to exceed 30 mg/L in only 15% of the 301 monitored storm events, and in only 12% of the 296 monitored events for permeable pavements. | Median concentrations of Total Suspended Solids (TSS) in untreated stormwater and oil and grit separator (OGS) outlet locations were found to typically exceed 30 mg/L. Median TSS concentrations at stormwater detention pond and chamber system outlet locations was found to be below 30 mg/L, but exceeded the guideline value in 36% of the monitored storm events. Median TSS concentrations at bioretention, permeable pavement and infiltration trench outlet locations were found to be all below 30 mg/L. TSS concentrations in effluent from bioretention was found to exceed 30 mg/L in only 15% of the 301 monitored storm events, and in only 12% of the 296 monitored events for permeable pavements. |