To qualify as a gray water system, the system must meet or exceed the following requirements:
provide flow measurement if a pump is to be employed;
meet the requirements of subparts 2 and 3.
Toilet waste must not be discharged to a gray water system.
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)).
32 SR 1347
October 10, 2013