Commercial properties have a different set of rules when it comes to drainage.  For businesses that use water for car washes or for vehicles maintenance, a sand/oil interceptor needs to be installed to capture dirt, sand, minor petroleum spills, etc. that enter floor drains and keep them out of the municipality’s wastewater system.  The water is filtered through the interceptor and continues on to the main, clean and not harmful to the environment.   Click here for typical guidelines.  In this case our favorite equipment dealer, Steel Tractor, needed the interceptor installed per the City of Fountain, as well as downspout extensions rerouted.