Oil separators need to be properly and regularly maintained to stay in working order. When these devices are not drained and cleaned out religiously, oils and other debris will stop them up and make them useless. This can cause the levels of oil in the released water to go beyond the effluence limits indicated.
If you are looking for a company that knows how to handle oil and water separators then 3R is the company for you. Contact firstname.lastname@example.org or (864) 848-1312 for your oil and water separator needs.