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7080.2300 TYPE III SYSTEMS.

A system that deviates from the requirements in parts 7080.2210 to 7080.2240 is a Type III system. Deviations from the standards in parts 7080.2210 to 7080.2240 must be submitted to the local unit of government for approval or denial. However, no deviation is allowed from the following standards and at a minimum a Type III system must:

A.

employ design flow values in parts 7080.1850 to 7080.1885;

B.

meet technical requirements of part 7080.2050;

C.

meet the requirements of parts 7080.1900 to 7080.2030;

D.

meet the requirements of part 7080.2100 with mound and at-grade systems required to have pressure distribution;

E.

provide flow measurement;

F.

meet the requirements of part 7080.2150, subparts 2 and 4;

G.

meet the requirements of part 7080.2150, subpart 3, items A, B, C, F, I, J, and L; and

H.

follow the absorption area loading rates in part 7080.2150, subpart 3, item E, Tables IX and IXa. If the site cannot accommodate a soil treatment and dispersal system sized in accordance with Table IX or IXa in part 7080.2150, subpart 3, item E, a smaller soil treatment and dispersal system is allowed to be constructed if it employs flow restriction devices that do not allow loadings in excess of those in Table IX or IXa of part 7080.2150, subpart 3, item E. In those cases where a loading rate or mound absorption ratio is not listed in Tables IX and IXa in part 7080.2150, subpart 3, item E, an alternative loading rate or absorption ratio is allowed to be proposed.

Statutory Authority:

MS s 115.03; 115.55

Published Electronically:

October 10, 2013

700 State Office Building, 100 Rev. Dr. Martin Luther King Jr. Blvd., St. Paul, MN 55155 ♦ Phone: (651) 296-2868 ♦ TTY: 1-800-627-3529 ♦ Fax: (651) 296-0569