Agenda - Council - 10/13/2009 - Laserfiche WebLink

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Number of Bedrooms Minimum Septic Tank requirements and Liquid Capacities (gallons)* 2 or less 1,000 with effluent filter 3 or 4 1500 with 2 compartments or multiple tanks with equivalent liquid capacity 5 or 6 2,000 with 2 compartments or multiple tanks with equivalent liquid capacity For seven or more bedrooms, The septic tank shall be sized as an other establishment. C. Table II in Part 7080.0130, subp. 3.A. is amended to read as follows: Table II *Systems designed with aerobic tanks must be equipped with trash traps sized according to the manufacturer =s recommendations instead of the requirements specified in the table. D. Table I in Part 7080.0125, supb. 2. is amended by deletion of columns "II," and "III," and the footnote. E. Part 7080.0150,subp.3.D. is amended to read: Perforations must be no smaller than 1/8 inch diameter and no larger than 1/4 -inch diameter. Perforations 5/32 inch in diameter or smaller must have orifice shields and pumps equipped with effective filters. F. Table IV in Part 7080.0170,subp.1.F.is amended to add the word (occupied) following Building on the third line of the table. G Part 7080.0170,subp.2B.(3) is amended to read: If gravelless drainfield pipe is used, lineal feet of piping must be increased 50% or pretreatment provided. Effluent filters are not considered pretreatment. H. Part 7080.0170, Subp.2. Table Va is amended to change the absorption ratio for mounds with fine sand soil texture and single grain soil structure from 1.0 to 2.0. 1. Part 7080.0178 is amended to add subp.2.D. to read: be designed to incorporate timed dosing when a pumping tank is utilized. J. Part 7080.0178 is amended to add subp.4 to read: Other Systems are allowed for reconstruction and new construction only when it can be shown that a standard system can not be constructed or is not the best choice. K Part 7080.0179 is amended to add subp.3 to read: Performance systems are allowed for reconstruction and new construction only when it can be shown that a standard system can not be constructed or is not the best choce. L. Part 7080.0179 is amended to add subp.2.C.(4) to read: Performance systems must provide at least the same quality of sewage treatment that would be achieved by dispersing the septic tank effluent through three feet of natural unsaturated soil. M. Part 7080.0179. Subp.2.C. (2) is amended to read: With Tess than 12 inches of unsaturated soil, fecal coliforms cannot exceed an average of 200 colonies per 100 ml or background -3-