(1) GENERAL. Except as provided in sub. (2):
(a) A sump that is part of a mixing and
loading pad, or part of a portland cement concrete secondary containment
structure, shall be constructed of portland cement concrete and shall meet the
standards specified in chapters 5 and 6 of the
Wisconsin Minimum Design
and Construction Standards for Concrete Mixing and Loading Pads and Secondary
Containment Structures (February 2005).
Note: The Wisconsin Minimum Design and
Construction Standards for Concrete Mixing and Loading Pads and Secondary
Containment Structures (February 2005), written by Professor David W.
Kammel, department of biological systems engineering, University of
Wisconsin-Extension, is on file with the department and the legislative
reference bureau. Copies are available from the department, free of charge, at
the following address:
Department of Agriculture, Trade and Consumer
Protection
Agricultural Resource Management Division
P.O. Box 8911
Madison, WI 53708-8911
Phone: (608) 224-4500
Web: http://www.datcp.state.wi.us
(b) A sump shall have a capacity
of not more [than] 50 gallons.
Note:The word in brackets was omitted from CR
05-108.
(c) A sump may not
be more than 2 feet deep, or have a depth that exceeds its shortest
width.
(d) The walls and floors of
a sump shall be at least as thick, at every point, as the mixing and loading
pad or secondary containment structure floor that drains to the sump.
(e) A sump that is part of a mixing or
loading pad shall form part of a continuous surface, having an area of at least
15 feet by 15 feet and a capacity of at least 250 gallons, which is free of
construction and control joints.
(f) If a sump is constructed as part of a
concrete mixing and loading pad or concrete secondary containment structure, it
shall be constructed in a continuous concrete pour with that pad or
structure.
(g) No pipes or openings
may extend through a sump. This does not prohibit a surface trough or rim
indentation needed to accommodate a pipe or hose connection required under s.
ATCP 33.50.
(h)
A sump shall be readily accessible for inspection. Pumps, collection basins or
other equipment placed in the sump shall be readily removable, so that all
surfaces of the sump can be easily inspected.
(2) EXEMPTION. Subsection (1) does not apply
to a sump that was in service prior to November 1, 2006 if all of the following
apply:
(a) The sump is not substantially
altered on or after November 1, 2006.
(b) The sump does not receive runoff from any
mixing and loading pad or secondary containment structure that is constructed
or substantially altered on or after November 1, 2006.
(c) The sump meets construction standards
that applied at the time of its construction.
(d) The operator pressure tests any
underground piping or conduit connected to the sump to ensure that the piping
or conduit is liquid-tight. The operator shall perform a pressure test at least
annually and shall keep a written record of the pressure test
results.
