N.J. Admin. Code § 7:9A-11.2 - Design requirements
(a) The percolating
area shall be considered to be the total outside surface of the seepage pit
lining below the inlet and exclusive of any soil horizons with a percolation
rate slower than 40 minutes per inch. The bottom of the seepage pit shall not
be counted as part of the percolating area.
(b) The minimum required percolating area for
dwelling units shall be determined from the following table, based upon a
weighted average, of the percolation rates of all the soil layers exposed in
the sidewalls, determined as prescribed in
7:9A-6.4(f)4. In
no case, however, shall the percolating area be less than 110 square feet per
dwelling unit.
Average | Minimum Area |
Percolation Rate | Per Bedroom Per Day |
(Min/inch) | (Square feet) |
10 or less | 72 |
11 to 20 | 108 |
21 to 30 | 144 |
31 to 40 | 180 |
over 40 | not acceptable |
(c) The
minimum percolating area for facilities other than individual dwellings shall
be determined from the following table based upon the volume of sanitary
sewage, determined as prescribed in
7:9A-7.4, and a weighted average of
the percolation rates of all soil layers exposed in the sidewalls, determined
as prescribed in
7:9A-6.4(f)4. In
no case, however, shall the percolating area be less than 110 square feet.
Average | Minimum Area |
Percolation | Per Gallon Per Day |
(Min/inch) | (Square feet) |
10 or less | 0.48 |
11 to 20 | 0.72 |
21 to 30 | 0.96 |
31 to 40 | 1.20 |
over 40 | not acceptable |
Notes
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