Changes

Sediment removal efficiencies for ISO 14034 verified OGS.  '''Group 1''' units (n=10) are conventional OGS with large openings.  '''Group 2''' units (n=2) contain additional components that filter or strain flows. Sediment removal performance results were relatively consistent across different MTD designs, with slightly more variation at higher surface loading rates (see Graph below). <br>  

Sediment removal efficiencies for ISO 14034 verified OGS.  '''Group 1''' units (n=10) are conventional OGS with large openings.  '''Group 2''' units (n=2) contain additional components that filter or strain flows. Sediment removal performance results were relatively consistent across different MTD designs, with slightly more variation at higher surface loading rates (see Graph below). <br>  

[[File:OGS-Protocol-Webpage-Image.jpg|thumb|320px|Performance testing of an OGS unit in St Anthony Falls Laboratory in Minnesota (Saddoris, et al. 2010)<ref>Saddoris, D.A., McIntire, K.D., Mohseni, O., and J.S. Gulliver, 2010.  Hydrodynamic Separator Sediment Retention Testing – Final Report. Minnesota Department of Transportation, St. Paul, MN.</ref>]]

[[File:OGS-Protocol-Webpage-Image.jpg|thumb|320px|Performance testing of an OGS unit in St Anthony Falls Laboratory in Minnesota (Saddoris, et al. 2010)<ref>Saddoris, D.A., McIntire, K.D., Mohseni, O., and J.S. Gulliver, 2010.  Hydrodynamic Separator Sediment Retention Testing – Final Report. Minnesota Department of Transportation, St. Paul, MN.</ref>]]

'''<small>*Note:''' Oil Grit Separators do not achieve the 80% removal efficiency required for stand alone application in Ontario, even at very low flow rates.</small>

'''<small>*Note:''' Oil Grit Separators do not achieve the 80% removal efficiency required for stand alone application in Ontario, even at very low flow rates.</small><br>

 

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[[File:Surface loading groups 1 & 2 OGS Update.png|900px]]<br>

[[File:Surface loading groups 1 & 2 OGS Update.png|900px]]<br>