Agenda - Council - 05/13/2014 - Laserfiche WebLink

Home

41 INDIVIDUAL SUBSURFACE SEWAGE TREATMENT SYSTEMS 7080.2100 1 Pipe diameter in inches 1.25 1.5 2 3 Perforation spacing in feet 2 12 18 26 46 87 2.5 12 17 24 40 80 3 12 16 22 37 75 1 1/8 inch holes Pipe diameter in inches 1.25 1.5 2 3 Perforation spacing in feet 2 21 33 44 74 149 2.5 20 30 41 69 135 3 20 29 38 64 128 F. Perforation holes must be drilled straight into the pipe and not at an angle. Pressurized distribution laterals must be installed level. Perforation holes must be free of burrs. Holes must be spaced no more than three feet apart. A method to introduce air into the pipe after dosing must be provided. The pipes must completely drain after the pump turns off. G. Pressure distribution laterals must be spaced no further than 36 inches apart in seepage beds and mound absorption beds, and no further than 24 inches from the outside edge of the bed. H. Pressure distribution laterals must be connected to a header or manifold pipe that is of a diameter such that the friction loss in the header or manifold will be no greater than five percent of the average head at the perforations. The header or manifold pipe must be connected to the supply pipe from the pump. 1. Perforated laterals must not be installed closer than 12 inches from the edges of the absorption bed and perforated laterals must terminate no closer than 12 inches from the ends of the absorption bed. J. Pressure distribution pipe cleanouts must be provided to check the system for proper operation and cleaning of plugged perforations. Cleanouts must be accessible from final grade. Statutory Authority: MS s 115.03; 115.55 History: 32 SR 1347; 35 SR 1353; 38 SR 1001 Published Electronically: January 22, 2014 7080.2100 DOSING OF EFFLUENT. Subpart 1. General. When pumping or dosing is necessary, it must comply with this part. Copyright ©2014 by the Rev so of Statutes, State of Minnesota. All Rights Reserved.