ARSD 74:53:01:32
In lieu of calculating the absorption trench system area according to §§ 74:53:01:30 and 74:53:01:31, the following criteria in Table 5 may be used for the design of individual or small on-site wastewater systems if the absorption trench system is of an area sufficient for at least three bedrooms. The absorption area shall be determined according to the following table:
(Squarefeetoftrenchbottomperbedroom) 1 but less than 5 minutes per inch
Not permitted--see § 74:53:01:33
5 but less than 10 minutes per inch
125 square feet
10 but less than 15 minutes per inch
165 square feet
15 but less than 30 minutes per inch
200 square feet
30 but less than 45 minutes per inch
250 square feet
45 but less than 55 minutes per inch
300 square feet
55 but no more than 60 minutes per inch
350 square feet
Over 60 minutes per inch
Not permitted--see § 74:53:01:33
The minimum absorption trench area, as shown in the above table, may be reduced in accordance with § 74:53:01:31 when the depth of fill material below the distribution pipe is 12 inches or greater.
Minimum Absorption Trench Area
Source: 12 SDR 2, effective July 18, 1985; 13 SDR 129, 13 SDR 141, effective July 1, 1987; transferred from § 74:03:01:69, July 1, 1996.
General Authority: SDCL 34A-2-93.
Law Implemented: SDCL 34A-2-20.