Minn. R. Part 7080.2350

Current through Register Vol. 48, No. 44, April 29, 2024

Part 7080.2350 - TYPE IV SYSTEMS

Subpart 1.General.

A system designed according to this part is considered a Type IV system. The system must:

A. employ design flow values in parts 7080.1850 to 7080.1885;

B. meet or exceed applicable technical requirements of parts 7080.1900 to 7080.2030, 7080.2050, and 7080.2100;

C. meet or exceed the requirements of part 7080.2150, subpart 2;

D. meet the requirements of part 7080.2150, subpart 3, except as modified in this part;

E. meet the requirements of Table XI in subpart 2; and

F. meet soil dispersal requirements of parts 7080.2210, 7080.2220, and 7080.2230, except that the reductions in part 7080.2210, subpart 3, item B, are not applicable.

Subp. 2.Table XI.

TABLE XI

TREATMENT COMPONENT PERFORMANCE LEVELS AND METHOD OF DISTRIBUTION BY TEXTURE GROUP¹

Vertical separation (inches)	Texture group2
	All sands and loamy sands	Sandy loam, loam, silt loam	Clay, clay loams
_____
12 to 173	Treatment level A Uniform distribution Timed dosing	Treatment level A Uniform distribution Timed dosing	Treatment level A Uniform distribution Timed dosing
18 to 353	Treatment level B Uniform distribution Timed dosing	Treatment level B Uniform distribution Timed dosing	Treatment level B Uniform distribution
36+3	Treatment level A-2 or B-2 Uniform distribution Treatment level C	Treatment level A-2 or B-2 Uniform distribution Treatment level C	Treatment level A-2 or B-2 Uniform distribution Treatment level C

¹The treatment component performance levels correspond with those established for treatment components under the product testing requirements in Table III in part 7083.4030.

² With less than 50 percent rock fragments.

³ Additional vertical separation distance is required as determined in part 7080.2150, subpart 3, item C, subitem (1), unit (b).

Subp. 3.Soil loading rates.

The absorption area and mound absorption ratio must be sized according to Table IX or IXa.

Minn. R. Part 7080.2350

32 SR 1347; 35 SR 1353

Statutory Authority: MS s 115.03; 115.55