§ 109.602. Acceptable design.

 (a)  A public water system shall be designed to provide an adequate and reliable quantity and quality of water to the public. The design shall ensure that the system will, upon completion, be capable of providing water that complies with the primary and secondary MCLs, MRDLs and treatment techniques established in Subchapter B (relating to MCLs, MRDLs or treatment technique requirements) except as further provided in this section.

   (1)  The Department may approve control techniques such as nonremoval processes, which abate the problems associated with a secondary contaminant and achieve the objective of the secondary MCL.

   (2)  The Department may approve a design which may cause an exceedance of a secondary MCL if the exceedance directly results from a treatment method used to achieve compliance with a primary MCL, the level of the secondary contaminant in the finished water does not represent an unreasonable risk to health nor otherwise adversely affect the normal uses of the finished water.

 (b)  Designs of public water facilities shall conform to accepted standards of engineering and design in the water supply industry and shall provide protection from failures of source, treatment, equipment, structures or power supply.

 (c)  The Department’s Public Water Supply Manual sets forth design standards which the Department finds to be acceptable designs. Other designs may be approved by the Department if the applicant demonstrates the alternate design is capable of providing an adequate and reliable quantity and quality of water to the public.

 (d)  Filtration facilities permitted after May 16, 1992, unless otherwise authorized under §  109.507 (relating to permits for innovative technology), shall be designed to include individual sampling ports or turbidimeters on the raw source water line, on the influent line to the filters and on the effluent lines for each filter bed.

 (e)  Point-of-use devices which are treatment devices applied to a single tap are not an acceptable treatment method for complying with an MCL or treatment technique requirement.

   The provisions of this §  109.602 adopted December 7, 1984, effective December 8, 1984, 14 Pa.B. 4479; amended May 15, 1992, effective May 16, 1992, 22 Pa.B. 2621; amended July 20, 2001, effective July 21, 2001, 31 Pa.B. 3895. Immediately preceding text appears at serial pages (207248) and (228311).

   This section cited in 25 Pa. Code §  109.705 (relating to sanitary survey).