Wisconsin Administrative Code › Department of Safety and Professional Services › SPS 301-399 - Safety, Buildings, and Environment › SPS 380-387 - Plumbing › Chapter SPS 382 - Design, Construction, Installation, Supervision, Maintenance And Inspection Of Plumbing › Subchapter III - Drain and Vent Systems › Section SPS 382.36 - Stormwater and clearwater plumbing systems

Current through June 24, 2024
(1) SCOPE. The
					 provisions of this section set forth the requirements for the design,
					 installation and maintenance of piping, conveyance, venting, detention and
					 treatment of stormwater and clearwater in plumbing systems.
Note:
Refer to ch. NR 151 for stormwater
						management requirements.
(2)
					 MATERIALS. All stormwater and clearwater plumbing systems shall be constructed
					 of approved materials in accordance with s.
					 SPS
					 384.30 (3).
(3) DESIGN OF STORMWATER PLUMBING SYSTEMS.
(a) Plumbing systems upstream of detention
					 shall be designed, at a minimum, based on the 10-year, 24-hour storm
					 event.
(b) Plumbing detention
					 systems and plumbing systems located downstream of detention shall be designed
					 based on anticipated flows and volumes.
(c) Stormwater and clearwater infiltration
					 systems shall comply with s.
					 SPS
					 382.365.
(d) Tank access shall comply with all the
					 following:
1. Each compartment of a detention
					 tank used for the reduction of total suspended solids shall be provided with a
					 manhole opening. For compartments with multiple inlets or outlets a manhole or
					 a cleanout, as determined under s.
					 SPS
					 382.35 (6) Table 382.35, shall be
					 provided at all additional inlets and outlets.
2. The distance between manhole openings
					 serving the same compartment may not exceed 50 feet.
3. A manhole opening shall be not less than
					 23 inches in the least dimension.
4. A manhole shall terminate at or above
					 ground surface and be of approved materials. Steel tanks shall have a minimum
					 2-inch collar for the manhole extensions permanently welded to the tank. The
					 manhole extension on fiberglass tanks shall be of the same material as the tank
					 and an integral part of the tank. The collar shall have a minimum height of 2
					 inches.
5. Manhole risers shall be
					 provided with a substantial, fitted, watertight cover of concrete, steel, cast
					 iron, or other approved material.
6. Manhole covers shall terminate at or above
					 grade and shall have an approved locking device.
7. Tanks shall conform to provisions of s.
					 SPS
					 384.25.
(e) Tank labeling shall comply with all the
					 following:
1. Covers for all tank openings
					 larger than 8 inches in diameter shall be provided with a permanent warning
					 label indicating the dangers of entering the tank, in accordance with this
					 paragraph.
2. The warning label
					 shall be securely attached and made of a noncorrosive metal or plastic bearing
					 the legend "DO NOT ENTER WITHOUT PROPER EQUIPMENT" or "DANGEROUS GASES EXIST IN
					 TANK" or similar language.
3. The
					 label shall be rectangular in shape with minimum dimensions of 4 by 5
					 inches.
4. The wording on the label
					 shall be a minimum of 1/2 inch in height and be either indented or raised.
Note:
For a listing of best management
						practices (BMPs) refer to ch. SPS 382 Appendix A-382.36 (3)-1.
Note:
Where local discharge requirements are
						more stringent, stormwater plumbing systems may provide detention and treatment
						to comply with the local stormwater management plan.