The document provides specifications for a high efficiency coalescer separator unit. The unit consists of two pre-filter vessels, two standard coalescer vessels, and two high-efficiency coalescer vessels. It has a capacity of 5,000 barrels per day and requires no external power. The coalescer separator merges small liquid drops into larger drops through multiple filter media layers to more easily separate oil and water, achieving less than 5 parts per million of oil and grease.