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Ohio DOT MTD Approval

The First Defense® High Capacity stormwater separator has been approved for use by the Ohio Department of Transportation.

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City of Indianapolis Approval Letter

First Defense High Capacity Stormwater Treatment Separator Approved for use by the City of Indianapolis

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City of Indianapolis Approval Letter First Defense

City of Indianapolis Approval Letter First Defense High Capacity Stormwater Separator

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VDOT MTD Approval

VDOT approved stormwater treatment systems 

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