Minn. R. 4725.2750
If a screen is attached or connected to the casing, the connection must be made by a threaded, solvent-welded, or welded joint, or by a nontoxic packer. Lead packers must not be used. A screen riser or leader must not extend more than 21 feet above the screen. A screen sump must not extend more than ten feet below the screen. The total combined length of screen riser or leader and screen sump must not exceed 21 feet. A screen riser, leader, or screen sump must comply with the confining layer requirements of part 4725.2020, subpart 1a. Multiple screens separated by a screen riser, leader, or sump are not permitted.
Minn. R. 4725.2750
Statutory Authority: MS s 103I.101; 103I.111; 103I.205; 103I.221; 103I.301; 103I.401; 103I.451; 103I.501; 103I.525; 103I.531; 103I.535; 103I.541; 103I.621; 144.05; 144.12; 144.383; 157.04; 157.08; 157.09; 157.13