"Wastewater (oil/water) separator" means any device or piece of equipment which utilizes the difference in density between oil and water to remove oil and associated chemicals from water, or any device, such as a flocculation tank or a clarifier, which removes petroleum derived compounds from waste water.
Ill. Admin. Code tit. 35, § 211.7210
Added at 17 Ill. Reg. 16504, effective September 27, 1993