The Dallas City Code
The “Pretreatment Program” ordinance is in Volume II, Chapter 49 Article IV and the “Liquid Waste” ordinance is in Volume I Chapter 19 Article X.
State Pretreatment Regulations
The Texas Pollutant Discharge Elimination System (TPDES) Pretreatment Program
Code of Federal Regulations - Pretreatment Regulations
EPA Pretreatment Program