Changes

# '''Light liquid capture and retention test''':  An optional test in which beads with a density similar to motor oil are pre-loaded into the unit and the number of beads in the effluent during pre-loading and testing are measured to assess the capacity of the unit to trap and retain light liquids. <br>

# '''Light liquid capture and retention test''':  An optional test in which beads with a density similar to motor oil are pre-loaded into the unit and the number of beads in the effluent during pre-loading and testing are measured to assess the capacity of the unit to trap and retain light liquids. <br>

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As of October 2023, there were nine OGS vendors with ISO 14034 verifications (as shown in the [[Oil and Grit Separator#Testing and Verification|table]] above), and 12 different OGS designs that have been verified.   

As of October 2023, there were nine OGS vendors with ISO 14034 verifications (as shown in the [[Oil and Grit Separator#Testing and Verification|table]] above), and 12 different OGS designs that have been verified.   

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

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

'''''Graph Above''''': Sediment removal efficiencies for ISO 14034 verified OGS.  '''Group 1''' units (n=10) are conventional OGS with large openings.<br>   

'''Group 2''' units (n=2) contain additional components that filter or strain flows. Sediment removal performance results were relatively consistent across<br>   

'''Group 2''' 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>