§ 94-16.  Prohibited Wastes; Exceptions. 
No user shall discharge or deposit any of the following materials, waste materials, wastes, gases or liquids
into any sanitary sewer forming a part of the County sewerage system, except where these may constitute
occasional, intermittent inclusions in the wastewater discharged from residential premises:  
Any wastewater having a temperature which will inhibit biological activity in a 
wastewater treatment plant or result in other interference with the treatment processes, 
but in no case wastewater with a temperature which exceeds 60° C. (140° F.) at its 
introduction into the wastewater treatment plant.  
Any water or waste containing more than 50 mg/l of fat, oil or grease or other substances 
that will solidify or become viscous at temperatures between 0° C. (32° F.) and 60° C. 
(140° F.).  
Wastewater containing floatable oil, fat or grease from industrial plants.  
Any garbage that has not been properly shredded so that no particles are any greater than 
1/2 inch in any dimension.  
Any waste capable of causing abnormal corrosion, abnormal deterioration, damage to or 
hazard to structures or equipment of the County sewerage system, or to humans or 
animals or interference with proper operation of wastewater treatment facilities. All 
wastes discharged to the County sewerage system must have a pH value in the range of 
to 10 pH units. Prohibited materials include, but are not limited to, concentrated acids 
and alkalis and high concentrations of compounds of sulfur, chlorine and fluorine and 
substances which may react with water to form strongly acidic or basic products.  
Any waters or wastes having a color which is not removable by the existing wastewater 
treatment processes and which causes the plant effluent to exceed NPDES color  
requirements for discharge to the receiving waters.