Minnesota Administrative Rules
Pollution Control Agency
7080 - INDIVIDUAL SUBSURFACE SEWAGE TREATMENT SYSTEMS
7080.2240 - GRAY WATER SYSTEMS.
Subpart 1. General.
To qualify as a gray water system, the system must meet or exceed the following requirements:
A. employ 60 percent of the 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, except as modified in this part;
C. provide flow measurement if a pump is to be employed;
D. meet or exceed the requirements of parts 7080.2210 to 7080.2230;
E. meet or exceed requirements of part 7080.2150, subparts 2 and 3; and
F. meet the requirements of subparts 2 and 3.Subp. 2. Toilet waste.
Toilet waste must not be discharged to a gray water system.Subp. 3. Sewage tank.
The liquid capacity of a gray water septic tank serving a dwelling must be based on the number of bedrooms existing and anticipated in the dwelling served and shall be at least as large as the capacities given in Table X.
|Number of bedrooms (gallons)||Tank liquid capacity|
|3 or less||750|
|4 or 5||1,000|
|6 or 7||1,250|
|8 or 9||1,500|
For ten or more bedrooms, the gray water septic tank shall be sized as: (1,500 + ((# of bedrooms - 9) x 150)).Statutory Authority:
MS s 115.03; 115.55History:
32 SR 1347Published Electronically:
October 10, 2013