Oil Removal From Condensate Water

Dear Members;

We need a system for condensate water de-oiling in a refinery.Oil content is often 15 ppm but sometimes reaches to 100ppm. The rest of the data is as follows:

Oil in Outlet Should be: <0.5 ppm

Now, what is your technical proposal for this situation that has an optimal design and also be cost-effective?

* It should be noted that oil isin both conditionsof dissolved and emulsify.