25 Pa. Code § 73.53. Seepage beds.

§ 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.

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).

Source

   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).

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).

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