“TSS” (denoting “total suspended solids”) means total suspended matter that either floats on the surface of or is in suspension in water, wastewater or other liquids, and that is removable by laboratory filtration as prescribed by standardized methods and referred to as nonfilterable residue. (Ord. 3220 § 1, 2016; Ord. 2742 § 1, 2008; Ord. 1706, 1989)