[[File:Surface loading groups 1 & 2 OGS Update.png|800px]]<br>
[[File:Surface loading groups 1 & 2 OGS Update.png|800px]]<br>
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'''''Graph Above''''': Sediment removal efficiencies for ISO 14034 verified OGS. ''Group 1'' units (n=10) are conventional OGS with large openings.<br>
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'''''Graph Above''''': Sediment removal efficiencies for ISO 14034 verified OGS. <span style="color:blue">Group 1</span style="color:blue"> units (n=10) are conventional OGS with large openings.<br>
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''Group 2'' units (n=2) contain additional components that filter or strain flows. Sediment removal performance results were relatively consistent across<br>
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<span style="color:orange">Group 2</span style="color:orange"> units (n=2) contain additional components that filter or strain flows. Sediment removal performance results were relatively consistent across<br>
different MTD designs, with slightly more variation at higher surface loading rates<br>
different MTD designs, with slightly more variation at higher surface loading rates<br>