Section 73.53. Seepage beds

Whenever seepage beds are employed, they shall meet the requirements of § 73.52(b)(5), (6), (8) and (10)—(16) (relating to standard trenches) in addition to the following specifications:

(1) The maximum slope of the undisturbed soil of a proposed absorption area where a seepage bed may be permitted is 8.0%.

(2) The required absorption area may be provided by one or more seepage beds:

(i) The individual beds of a single onlot system shall be separated by a minimum of 5 feet.

(ii) When elevated sand mound beds are used, the distance between beds shall be measured from the toe of the sand of each bed.

(3) The bed shall contain a minimum of two laterals or two opposing sets of laterals when pressure distribution is used.

(4) Laterals shall be equally spaced a maximum of 6 feet on center, except as provided in § 73.44(c)(8) (relating to pressurized distribution design).

(5) Laterals shall be placed no further than 5 feet nor less than 2 feet from the sidewalls of the bed.

(6) Laterals shall be placed in the bed so that the first and last discharge holes may be no more than 5 feet nor less than 2 feet from the ends of the bed.

The provisions of this § 73.53 adopted January 21, 1983, effective January 22, 1983, 13 Pa.B. 508; amended November 7, 1997, effective November 8, 1997, 27 Pa.B. 5877. Immediately preceding text appears at serial page (217334).

Notation

Authority

The provisions of this § 73.53 amended under section 9 of the Pennsylvania Sewage Facilities Act (35 P. S. § 750.9); The Clean Streams Law (35 P. S. § § 691.1—691.1001); and section 1920-A of The Administrative Code of 1929 (71 P. S. § 510-20).

Cross References

This section cited in 25 Pa. Code § 71.63 (relating to retaining tanks); 25 Pa. Code § 73.44 (relating to pressurized distribution design); 25 Pa. Code § 73.54 (relating to subsurface sand filters); and 25 Pa. Code § 73.55 (relating to elevated sand mounds).