- a) Catch Basins. In all motor vehicle wash racks, drainage shall discharge into a water-tight catch basin at least 36 inches in diameter, or 3 feet by 2½ feet (rectangular shape). The bottom shall not be less than 27 inches below the invert of the outlet pipe. The outlet pipe shall be trapped with a catch basin trap and shall be constructed of cast iron or schedule 40 plastic with a trapseal of at least 6 inches and a cleanout of at least 4 inches in diameter.
- b) Commercial laundries shall be equipped with an interceptor having a removable wire basket or similar device that will prevent materials detrimental to the sewage system from passing into the system.
- c) Sand, bottle and slaughter houses that will produce wastes that either settle or float (Example: oil or grease from meat packing operations, bottling establishments or heavy solids.) shall have an interceptor installed that complies with Section 890.510(a).
- d) Interceptor for Special Waste. Before installing any interceptor for any other flammable or special wastes, a drawing including all pertinent information shall be submitted to the Department for approval.
(Source: Amended at 38 Ill. Reg. 9940, effective April 24, 2014)