It is the grease removed from wastewater sent down a sink drain also known as grease trap. Moreover, the material removed from sewers known as «FOG» (Fats, Oils and Grease skimmed from the material coming into sewage treatment plants) is reported under this name. Typical specifications for this material are: FFA min. 40%, MIU max. 5% , IV 60-130, high sulphur and phosphorus. Brown Grease is considered an advanced feedstock and it is listed in part A, Annex IX of RED II.