Minnesota Administrative Rules
Agency 167 - Pollution Control Agency
Chapter 7080 - INDIVIDUAL SUBSURFACE SEWAGE TREATMENT SYSTEMS
Part 7080.2350 - TYPE IV SYSTEMS
Current through Register Vol. 49, No. 13, September 23, 2024
Subpart 1. General.
A system designed according to this part is considered a Type IV system. The system must:
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.
Statutory Authority: MS s 115.03; 115.55
