2010-01172 septic - Laserfiche WebLink

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� � 7. Drain Field � a. Proposed drain field: 10' x 50' = 500 square feet of a pressurized mound drain field. � b. Excavate the drain field at the location depicted on the Figures and staked onsite. � c. Cut any vegetation to a height of 2-3". Remove any trees or brush that is within the proposed drain field area. �� d. Ensure the soils are below the plastic limit and rough up the soils within , the area of the mound to a depth of 8 inches. � e. Install clean washed sand meeting the requirements of State Code Chapter 7080.2220, subpart 3, item C, in the mound area. � f. Create a level 50'L x 10' W x 0.9' D, rock bed by installing clean sewer ' rock,meeting the requirement of Minnesota Rules Chapter 7080. � g. Install the lateral distribution network with (3) 2" laterals above rock bed with flushing valves at the end of each lateral. Cover laterals with 2" of clean sewer rock. � h. Install 4" observation pipe to the bottom of the rock bed and 1 foot above finished grade. � i. Cover entire bed area with a non-woven geo-textile fabric that is not so heavy as to prevent good air exchange. Install a sandy to loamy soil � material over the rock bed with a depth of one foot at the center of the bed, tapering to six inches at the sides. � j. Install six inches of topsoil over the entire mound. Establish a vegetative cover over the entire mound. � , , � 8. Lateral Network a. Each bed will contain (3) 2" sch. 40 PVC laterals with 1/4" orifices with spacing detailed in the design worksheets (Appendix C). � b. Install a 2" sch. 40 PVC su 1 line from dischar e i e from the lift PPY g PP pump to a 2" solid manifold. � 9. Insulation � a. Installer responsible to take measures where freezing potential is high (under trails, paths, driveway or long sewer line runs, etc...) to protect � � 4