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Pretreatment Requirements for RV Dump Stations 1. Each RV dump station shall be equipped with signage that displays the following statements: “RV Dump Station-Only holding tanks from RV’s shall discharge here” and “Water is NOT SAFE for Drinking” 2. RV dump stations shall be constructed per CK Standard Detail PT.5. 3. RV dump stations shall discharge into a 2,500-gallon septic tank that is designed per CK Standard Detail PT.6 and PT.7. 4. A sample port designed per CK Standard Detail PT.3 shall be installed of the septic tank. 5. Waterproofing of all pretreatment related concrete structures shall match CK Standard Detail SA.3. All joints between sections, adjusting rings, top sections and pipes in all pretreatment related structures shall be watertight. Applicability These requirements are applicable to all commercial establishments that are undergoing: 1. New construction 2. Interior remodeling to accommodate expansion or operational modifications 3. Changes of ownership/occupancy 4. Facilities which are experiencing difficulty in achieving compliance with maintenance and /or wastewater discharge limitations Materials for Interceptor and Sample Port Traffic rated locations 1. Concrete grade rings 4000 psi minimum 2. Reinforced concrete pipe 4000 psi minimum Non traffic rated locations 1. Concrete grade rings- 4000 psi minimum 2. HDPE grade rings 3. Black double wall corrugated HDPE pipe Waterproofing 1. Ram-Nek or approved equivalent must be used to seal between the grease interceptor lid, each grade ring, and the manhole ring 2. The first-grade ring must be grouted to the interceptor lid 3. All joints between sections, adjusting rings, top sections and pipes in all pretreatment related structures shall be watertight per CK Standard Detail SA.3 Composite, Polyethylene and Fiberglass Interceptors 1. These interceptors can only use manufacturer supplied manhole and inspection port riser 2. If located in traffic areas, measures must be put in place to meet HS-20 loadings for all applicable areas of the system For more information contact the Industrial Pretreatment Coordinator’s Office at (406) 758-7817 ---PAGE BREAK--- ---PAGE BREAK--- ---PAGE BREAK---