| (a) Licensed engineer. A surface skimming system or
perimeter overflow (gutter) system constructed on or after the effective
date of this subchapter shall be planned and designed by a licensed
engineer.
(b) Surface skimming design. A surface skimming system
or perimeter overflow system shall be planned and designed as required
in §265.159 of this subchapter (relating to Suction Outlets,
Gravity Flow Systems, and Return Inlets) and shall be capable of providing
100% of the design system flow, unless the department has approved
an alternate method of disinfectant.
(c) Safe design of surface skimming and perimeter overflow
systems. A surface skimmer or perimeter overflow system shall be designed
and installed to prevent body and limb entrapment.
(d) Effective skimming action maintained. Surface skimmers
shall be located to maintain effective skimming action throughout
the lagoon.
(e) Hydraulic capacity of perimeter overflow system.
The hydraulic capacity of a perimeter overflow (gutter) surface skimming
system shall be capable of handling 100% of the circulation flow,
unless the department has approved an alternate method of disinfectant.
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