Wis. Admin. Code SPS § SPS 382.36

Current through December 30, 2024

Section SPS 382.36 - Stormwater and clearwater plumbing systems

(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.

(4) DISCHARGE AND CONNECTIONS.

(a)Discharge points. The discharge points for stormwater and clearwater shall be as specified in Table 382.38-1.

(b)Segregation of wastewater.

1. Except as provided in subd. 2., stormwater or clearwater piping may not connect to a sanitary drain system.

2. Where a combined sanitary-storm sewer system is available, stormwater, clearwater and sanitary wastewater may be combined in the building sewer.

3. Stormwater gravity drains shall not be combined with clearwater drains prior to discharging to the storm building drain except where approved by the department.

Note: See also Table SPS 382.38 -1 which limits clearwater discharges to sanitary sewer at 50 gpd.

Note: For the use of stormwater or reuse of clearwater, refer to the appropriate requirements in ss. SPS 382.30, 382.34, 382.40, 382.41, 382.70 and this section.

Note: For further explanatory material regarding the rational method, other methods and runoff co-efficients, see ch. SPS 382 Appendix A-382.36 (4).

(5) INPUT CALCULATIONS.

(a)Peak flow. The peak flow of stormwater influent to a plumbing system shall be calculated using any of the following methods:

1. 'Area method.' For sizing of conveyance piping, when calculating stormwater peak flow based on the tributary area, the area in square feet shall be divided by the following applicable divisors:

a. For roofs the divisor is 26 square feet/gpm.

b. For paved or graveled ground surfaces the divisor is 32.5 square feet/gpm.

c. For lawns, parks and similar land surfaces the divisor is 104 square feet/gpm.

Note: For example, 10,000 square feet of roof area/26 square feet/gpm = 385 gpm or 0.85 cubic feet/second.

2. 'Rational method.' For calculating peak flow, the intensity shall be determined using the time of concentration for the tributary area.

Note: For the equation procedure for runoff coefficients for use with the rational method, refer to ch. SPS 382 Appendix A-382.36 (5)-1.

3. 'Engineering analysis method.' An engineering analysis shall be based on an analysis provided by a Wisconsin registered architect, registered professional engineer, or permitted designer of engineering systems - plumbing, or an approved alternate standard per s. SPS 381.20 (2) based on the peak flow calculated in accordance with sub. (3) (a).

Note: A model that calculates peak flow such as SWMM, TR-20, TR-55, P8 or an equivalent methodology may be used.

(b)Volume. The volume of stormwater influent to a plumbing system shall be based on an analysis provided by a Wisconsin registered architect, registered professional engineer, or permitted designer of engineering systems - plumbing, or an approved alternate standard per s. SPS 381.20 (2) and a minimum of a two-year, 24-hour storm event and designed so that no property damage occurs at 100-year, 24-hour storm event with a Type II distribution.

Note: For runoff coefficients and use of other methods or models, refer to ch. SPS 382 Appendix A-382.36 (5)-2 and A-382.36 (5)-3.

Note: The intensity of rainfall varies considerably during a storm as well as geographic regions. To represent various regions of the United States, the U.S. Department of Agriculture (USDA), Natural Resources Conservation Service (NRCS) developed four synthetic 24-hour rainfall distribution types from available National Weather Service (NWS) duration-frequency data (Hershfield 1961; Frederick et al., 1977) or local storm data. Type IA is the least intense and type II is the most intense short duration rainfall. Types I and IA represent the Pacific maritime climate with wet winters and dry summers. Type III represents Gulf of Mexico and Atlantic coastal areas where tropical storms bring large 24-hour rainfall amounts. Type II represents the rest of the country, including Wisconsin. For more information, see the USDA-NRCS webpage: http://www.nrcs.usda.gov/.

(c)Additional inputs to stormwater systems. Additional inputs to stormwater systems shall be estimated based on anticipated flows and volumes.

(6) CONVEYANCE AND DETENTION SYSTEMS.

(a)Design. The design of stormwater and clearwater conveyance systems shall conform to all of the following:

1. Horizontal stormwater conveyance piping shall be sized using either of the following:

a. An engineering analysis, based on full flow capacity, acceptable to the department.

b. Tables 382.36-1 to 382.36-5 based on pipe type, diameter and pitch.

2.

a. A vertical conductor for stormwater may not be smaller than the largest horizontal branch discharging into the conductor.

b. Vertical conductors shall be sized in accordance with Tables 382.36-1 and 382.36-3 or by an engineering analysis acceptable to the department.

Note: For the use of Baird's equation, refer to ch. SPS 382 Appendix A-382.36 (6)-1.

3. Clearwater conveyance systems shall be sized in accordance with s. SPS 382.30 (3) and (4).

4. Underground, gravity-flow storm building sewers shall have a minimum 3-inch inside diameter.

(b)Velocity in stormwater conveyance system piping. The pitch of stormwater conveyance system piping shall be designed to create a minimum velocity of one foot per second when flowing full.

(c)Fittings and connections.

1. Except as provided in subd. 2., fittings and connections for stormwater and clearwater conveyance systems shall comply with s. SPS 382.30 (8) and (9).

2. The minimum radius for the first 90° fitting located downstream of a roof drain shall comply with the horizontal to vertical requirements in Table 382.30-4.

(d)Stack offsets. Stack offsets for piping of a clearwater conveyance system piping shall comply with s. SPS 382.30 (6).

(e)Pitch of clearwater gravity conveyance system piping.

1. The minimum pitch of gravity conveyance system piping having a 2-inch inside diameter or less shall be 1/8 inch per foot.

2. The minimum pitch of clearwater gravity conveyance system piping having at least a 3-inch inside diameter or more shall be 1/16 inch per foot.

(f)Branch connections near base of stack. Branch drains from interior clearwater inlets may not connect downstream from the base fitting or fittings of a drain stack within a distance equal to 20 pipe diameters of the building drain.

(g)Detention systems.

1. The storage volume of a dry detention system shall be designed and installed with a drain time of 72 hours after a storm event.

2. Paved surfaces or parking lots serving as detention areas shall be limited to a design depth of 6 inches, unless otherwise limited by local ordinance.

3. By design, ground surface ponding shall drain within 24 hours after a storm event.

4. A subsurface stormwater detention system that has a permanent pool of water shall be designed and installed in a manner that accomplishes vector control.

Table 382.36-1

Maximum Capacity of Stormwater Conveyance Piping for PVC, ASTM D1785, D2665, F891 and ABS, ASTM D1527, D2661, F628

Nominal Pipe Size (in inches)	Maximum Capacities in gallons per minute (gpm)
	Pitch of Piping Per Foot
	1/32 inch	1/16 inch	1/8 inch	1/4 inch	1/2 inch	Vertical
	(0.26% slope)	(0.52% slope)	(1.04% slope)	(2.08% slope)	(4.16% slope)
2	11	15	22	31	44	34
3	30	40	60	80	110	89
4	60	80	120	160	230	183
5	110	150	210	300	420	334
6	170	240	340	480	690	545
8	360	510	710	1,010	1,430	1,133
10	660	930	1,310	1,850	2,620	2,079
12	1,050	1,480	2,090	2,960	4,180	3,316
14	1,350	1,900	2,690	3,810	5,390	4,271
16	1,920	2,720	3,840	5,440	7,690	6,097
18	2,630	3,720	5,270	7,440	10,520	8,348
20	3,520	4,970	7,030	9,956	14,060	11,155
24	5,750	8,140	11,490	16,260	22,990	18,244

Note: To convert to cubic feet per second (cfs) divide gpm by 448.8.

Table 382.36-2

Maximum Capacity of Stormwater Horizontal Conveyance Piping for PVC, ASTM D3034

Nominal Pipe Size (in inches)	Maximum Capacities in gallons per minute (gpm)
	Pitch of Piping Per Foot
	1/32 inch	1/16 inch	1/8 inch	1/4 inch	1/2 inch
	(0.26% slope)	(0.52% slope)	(1.04% slope)	(2.08% slope)	(4.16% slope)
4	60	80	110	160	220
6	160	230	320	450	640
8	350	490	700	990	1,400
10	630	900	1,270	1,790	2,540
12	1,010	1,430	2,020	2,850	4,040
15	1,730	2,450	3,460	4,900	6,920

Note: To convert to cubic feet per second (cfs) divide gpm by 448.8.

Table 382.36-3

Maximum Capacity of Stormwater Conveyance Piping for Cast Iron, ASTM A74 and ASTM A888

Nominal Pipe Size (in inches)	Maximum Capacities in Gallons Per Minute (gpm)
	Pitch of Piping Per Foot
	1/32 inch	1/16 inch	1/8 inch	1/4 inch	1/2 inch	Vertical
	(0.26% slope)	(0.52% slope)	(1.04% slope)	(2.08% slope)	(4.16% slope)
2	NA	NA	NA	NA	NA	26a
3	20	30	40	60	80	80
4	50	60	90	130	180	173
5	80	120	170	230	330	315
6	140	190	270	380	540	516
8	290	420	590	830	1,170	1,118
10	540	770	1,090	1,540	2,170	2,068
12	870	1,230	1,740	2,490	3,490	3,318
15	1,630	2,310	3,270	4,620	6,530	6,217

^a. Sizing per manufacturer's specifications.

Note: To convert to cubic feet per second (cfs) divide gpm by 448.8.

Table 382.36-4

Maximum Capacity of Stormwater Horizontal Conveyance Piping for Concrete, ASTM C76 and ASTM C14

Nominal Pipe Size (in inches)	Maximum Capacities in gallons per minute (gpm)
	Pitch of Piping Per Foot
	1/32 inch	1/16 inch	1/8 inch	1/4 inch	1/2 inch
	(0.26% slope)	(0.52% slope)	(1.04% slope)	(2.08% slope)	(4.16% slope)
4	40	60	90	120	170
6	130	180	260	360	510
8	280	390	550	780	1,110
10	500	710	1,000	1,420	2,010
12	820	1,150	1,630	2,310	3,260
15	1,480	2,090	2,960	4,180	5,910
18	2,400	3,400	4,810	6,800	9,620
21	3,630	5,130	7,250	10,260	14,500
24	5,180	7,320	10,350	14,640	20,710
27	7,090	10,020	14,170	20,050	28,350
30	9,390	13,270	18,770	26,550	37,550
33	12,100	17,120	24,210	34,230	48,410
36	15,260	21,590	30,530	43,170	61,060
39	18,900	26,720	37,790	53,440	75,580
42	23,020	32,560	46,050	65,120	92,100
48	32,870	46,490	65,740	92,980	131,490
54	45,000	63,640	90,010	127,290	180,010
60	59,600	84,290	119,200	168,580	238,410

Note: To convert to cubic feet per second (cfs) divide gpm by 448.8.

Table 382.36-5

Maximum Capacity Of Stormwater Horizontal Conveyance Piping For Elliptical Reinforced Concrete Pipe

Pipe Diameters in inches (circular pipe equivalent)	Maximum Capacities in gallons per minute (gpm)
	Pitch of Piping Per Foot
	1/16 inch	1/8 inch	1/4 inch	1/2 inch
	(0.52% slope)	(1.04% slope)	(2.08% slope)	(4.16% slope)
14 X 23 (18)	3,300	4,675	6,700	9,500
19 X 30 (24)	7,200	10,060	14,700	21,000
24 X 38 (30)	13,250	18,740	26,500	37,475
29 X 45 (36)	21,545	30,475	43,095	60,940
34 X 53 (42)	32,500	45,965	65,000	91,925
38 X 60 (48)	46,405	65,625	92,800	131,245
43 X 68 (54)	63,525	89,840	127,050	179,800
48 X 76 (60)	84,135	118,985	168,270	237,965

(7) OTHER DESIGN REQUIREMENTS.

(a)Subsoil drains.

1. A subsoil drain discharging to a plumbing system shall discharge into an area drain, manhole or storm sewer, trapped receptor or a sump with a pump.

2. Where a foundation drain is subject to backwater, the drain shall be protected by a backwater valve or a sump with a pump.

(b)Backwater valve. All backwater valves shall be accessible for maintenance.

(c)Sewer location.

1. No storm building sewer or private interceptor main storm sewer may pass through or under a building to serve another building, unless one of the following conditions is met:

a. The storm building sewer or private interceptor main storm sewer serves farm buildings or farm houses, or both, that are located on one property.

b. Where a storm building sewer or private interceptor main storm sewer serves buildings that are located on one property, a document that indicates the piping and distribution arrangement for the property and buildings is recorded with the register of deeds no later than 90 days after installation.

2. The location of storm building drains and building sewers shall comply with ss. SPS 382.30 (11) (d) and 382.40 (8) (b) 7.

(d)Installation requirements.

1. The connection of a stormwater leader discharging to a storm building sewer shall be made at or above the finished grade.

Note: For more information regarding joints and connections, refer to s. SPS 384.40.

1m. If in direct connection and at finished grade, a removable strainer shall protect the inlet. The capacity of the strainer shall be provided in accordance with sub. (9) (b).

2. The elevation of a storm building drain shall comply with s. SPS 382.30 (11) (b) 1.

3. Interior inlets and drains subject to backflow or backwater shall be protected with a check valve or backwater valve.

4. Storm building drains and building sewers shall be installed to comply with s. SPS 382.30 (11) (e).

5. Storm building sewer connections to public sewers shall be in accordance with s. SPS 382.30 (11) (f).

6. Cleanouts for conveyance system piping shall be installed in accordance with s. SPS 382.35.

7. Storm building sewers that receive clearwater and that may be subject to freezing shall be installed in accordance with s. SPS 382.30 (11) (c) 2.

8. Storm building drains, clearwater building drains, and building storm sewers and appurtenances shall be separated from water wells by the applicable separation distances contained in chs. NR 811 and 812, or as otherwise permitted by the department of natural resources.

9. All underground stormwater storage tanks for water reuse shall be separated from sanitary sewers by a minimum of 8 feet.

10.

a. A means to locate buried non-metallic storm building sewers and private interceptor main sewers that discharge to municipal mains shall be provided in accordance with the options under s. SPS 382.30 (11) (h), except as provided in subd. 10. b.

b. Tracer wire insulation color for non-metallic storm pipe shall be brown.

11. Subsoil drain connections to the storm sewer shall be installed at a point above the horizontal center line of the storm sewer in such a manner that the subsoil drain is entirely above the top of the building sewer; or be provided with a backwater valve.

(e)Hydrodynamic stormwater separators. Hydrodynamic stormwater separators shall conform to ASTM F1745/F1745m.

(8) SUMPS AND PUMPS.

(a)Sumps.

1. 'General.' All storm building subdrains shall discharge into a sump, the contents of which shall be automatically lifted and discharged, dispersed or used in accordance with sub. (4).

2. 'Construction and installation'.

a. Except as provided in subd. 2. c. and d., an interior sump shall have a rim extending at least one inch above the floor immediately adjacent to the sump.

b. A sump shall have a removable cover of sufficient strength for anticipated loads.

c. Where a sump is installed in an exterior meter pit or elevator pit, the rim may be level with the floor.

d. When a sump is provided with an airtight, solid cover.

3. 'Location'. All sumps installed for the purpose of receiving clearwater, groundwater or stormwater shall be separated from water wells by the applicable separation distances contained in chs. NR 811 and 812, or as otherwise permitted by the department of natural resources.

Note: See ch. SPS 382 Appendix A-382.30 (11) (d) for material reprinted from s. NR 812.08.

4. 'Size'.

a. Except as permitted under subd. 4. b. or c. the size of each sump shall be no smaller than 16 inches in diameter at the top, 14 inches in diameter at the bottom, and 22 inches in depth, but in no case smaller than the manufacturer requirements to ensure sufficient pump run time.

b. The minimum sump diameter may be smaller than 16 inches when specified by the manufacturer for a combination sump and pump.

c. A sump located in an elevator pit may have a width or diameter of not less than 12 inches and a depth of not less than 12 inches.

5. 'Solid covered sumps.' A storm or clearwater sump with a solid cover shall be vented. The vent shall terminate a minimum of 1 inch above finished floor and be sized per Table 382.31-4. In lieu of a separate vent, a sealed sump may incorporate a radon vent connected to the subsoil drain or sump cover.

(b)Pumps.

1. 'Size.' The pump shall be of a capacity appropriate for the anticipated use.

2. 'Discharge piping.'

a. Where a pump discharges into a storm drain system, a check valve shall be installed.

b. The minimum diameter discharge piping shall be based on the design flow rate of the pump and a minimum velocity of one foot/second.

3. 'Clearwater discharge.' Clearwater may not discharge into a stormwater sump, except for one- and 2-family dwellings.

(9) INLET REQUIREMENTS.

(a)Interior clearwater drain inlets. Interior clearwater drain inlets shall terminate at least one inch above the finished floor.

(b)Exterior stormwater inlets.

1. 'Construction.'

a. All exterior stormwater inlets shall be constructed of material in accordance with s. SPS 384.30.

Note: For additional information on approved materials, refer to s. SPS 384.30 (3) (f).

b. All exterior stormwater inlets subject to vehicular traffic shall be set on a suitable base capable of sustaining the anticipated load.

2. 'Design'. All exterior stormwater inlets shall be designed for the anticipated flow.

Note: For manhole requirements, refer to s. SPS 382.35 (3).

3. 'Inlet grates'.

a. General. All inlets shall be provided with a well-fitted, removable grate of a thickness and strength to sustain the anticipated loads.

Note: Sections SPS 362.1101 to 362.1110 specify that for floor or ground surface inlets when placed within an identifiable accessible route, openings in the floor or ground surface shall be of a size that does not permit the passage of a 1/2-inch sphere. Also, it states that grates having elongated openings be placed so that the longest dimension is perpendicular to the dominant direction of travel.

b. Floor or ground surface inlets. Openings in the floor or ground surface shall be of a size that prohibits the entrapment of wheeled vehicles, wheelchairs or pedestrians within the grate openings.

c. Grates on horizontal pipes. Grates shall be provided on horizontal inlets greater than 6 inches in diameter. The grates shall be placed so that the rods or bars are not more than 3 inches downstream of the inlet. Rods or bars shall be spaced so that the openings do not permit the passage of a 6-inch sphere.

Note: See ch. SPS 382 Appendix for further explanatory material.

(c)Subsurface areas of 50 square feet or less. Other than stairwells, all subsurface areas not exceeding 50 square feet and exposed to the weather, shall comply with one of the following:

1. Drain to foundation drains through a minimum 2-inch diameter pipe or a through a continuous layer of washed stone aggregate.

2. Drain to the storm building drain, storm subdrain or storm sewer through a minimum 3-inch diameter pipe.

(d)Subsurface areas of more than 50 square feet and stairwells. An area drain shall be provided in subsurface areas greater than 50 square feet and in all stairwells exposed to the weather. The area drain shall comply with all of the following:

1. Drain to the storm building drain, storm subdrain or storm sewer.

2. The fixture drain shall have a minimum 3-inch inside diameter and may not discharge into a subsoil or foundation drain.

(10) ROOF DRAINS.

(a)General roofs. Conventional roof, deck, and balcony drains shall conform to ASME A112.6.4 and the following:

Note: Roof structure requirements are contained in chs. SPS 361 - 366.

1. Roof drains shall be equipped with strainers extending not less than 4 inches above the surface of the roof immediately adjacent to the roof drain. Strainers shall have an available inlet area above the roof not less than 1.5 times the area of the conductor to which the drain connects.

2. Roof strainers used on sun decks, open parking decks, and similar areas shall be of the flat surface type, shall be level with the deck, and shall have an available inlet area not less than 2 times the area of the conductor to which the drain connects.

(b)Siphonic roof drains. Siphonic roof drains shall conform to ASME A112.6.9 or ASTM F2021 and be indelibly marked with the following minimum information:

1. The dome, bodies, and baffle plates shall be marked with the manufacturer's name or trademark.

2. The baffle plate and drain body shall be marked with the baffle plate model number, resistance value, k, and words, "replace missing baffle with model."

3. The design of siphonic roof drainage systems shall conform to ASPE 45.

(c)Controlled flow roof drains.

1. 'Application.' In lieu of sizing the roof drain piping based on actual maximum horizontal roof areas as specified in sub. (5) (a) 1., the roof drain piping may be sized based on the equivalent adjusted maximum horizontal projected roof areas which result from controlled flow and storage of storm water on the roof.

2. 'Installation.' Control of storm water runoff shall be by control devices. Control devices shall be protected by strainers.

3. 'Sizing.' Two or more drains shall be installed on roof areas less than or equal to 10,000 square feet in area, 4 or more drains shall be installed on roof areas greater than 10,000 square feet in area.

4. 'Storms.' The water from a 10-year, 24-hour storm event may not be stored on the roof for greater than 24 hours.

(d)Secondary roof drains

1. 'Sizing.' When secondary roof drain systems are installed the secondary system shall be sized and installed in accordance with the requirements in this section using the same calculations and methods as the primary system.

2. 'Prohibited connection.' Secondary roof drain systems may not be connected to primary roof drain systems.

3. 'Discharge.' All secondary roof drain systems shall discharge in accordance with Table 382.38-1.

4. 'Openings.' The opening for the secondary roof drainage shall be not less than 2 inches and not more than 4 inches above the bottom opening of the primary roof drain.

5. 'Overflow drains.' Secondary overflow drains and overflow standpipes rim elevations shall be not less than 2 inches and not more than four inches above the bottom elevation of the primary roof drains.

6. 'Overflow drains.' Secondary overflow drains and overflow standpipes rim elevations may not exceed 5 inches in height above the adjacent roof elevation served by the primary roof drains.

(12) TRAPS AND VENTS.

(a)Traps.

1. Traps are required for interior drain inlets receiving clearwater.

2. Except for exterior loading dock drains, traps are required for exterior drain inlets located within 10 feet of an air inlet, door or openable window.

3. More than one drain inlet may discharge to the same trap.

4. A foundation drain that discharges by gravity to a storm sewer shall be trapped. The trap shall be provided with cleanouts.

(b)Vents.

1. A trap receiving clearwater shall be vented in accordance with s. SPS 382.31. Vent piping for a clearwater drain system may not be connected to a vent system serving a sanitary drain system or chemical waste system.

2.

a. Vents serving a solid covered sump shall terminate a minimum of 1 inch above finished floor or in accordance with s. SPS 382.31 (16), except for s. SPS 382.31 (16) (d) 1. c. In lieu of a separate vent, a sealed sump may incorporate a radon vent connected to the subsoil drain or sump cover.

b. Sump vents shall be sized as per Table 382.31-4.

(13) OPERATION AND MAINTENANCE.

(a)Plan. An operation and maintenance plan shall be implemented for all stormwater plumbing systems for drainage areas of one or more acres that are installed on or after December 1, 2004.

(b)Plan information. An operation and maintenance plan as required in par. (a) shall include at least all of the following information, applicable to the system:

1. Accumulated solids or byproduct removal requirements.

2. Identification of safety hazards.

3. Cleaning and inspection schedule.

4. Inspection and maintenance checklist, including at least the following items:

a. Filters.

b. Disinfection units.

c. Sedimentation chambers.

d. Detention devices.

e. Infiltration systems.

5. Start up and shutdown procedures.

6. Vector control requirements.

7. A contingency plan in the event of system failure.

8. Pre-construction runoff volume.

9. Post-construction runoff volume.

10. Infiltration volume.

11. Detention volume.

(c)Plan location. The operation and maintenance plan shall remain onsite and be available for inspection when requested by the department.

(d)Record of maintenance. When requested the owner shall make available for inspection all maintenance records to the department or agent for the life of the system.

Wis. Admin. Code Department of Safety and Professional Services § SPS 382.36

Cr. Register, February, 1985, No. 350, eff. 3-1-85; r. and recr. (3) (a) and (b) 1., (c) 1. and (11) (a) 4., cr. (3) (c) 3., Register, May, 1988, No. 389, eff. 6-1-88; renum. (13) (a) and (b) to be (b) and (c) and am. (b) 1., cr. (3) (b) 3. and (13) (a), r. (3) (c) 3. and (13) (intro.), Register, August, 1991, No. 428, eff. 9-1-91; reprinted to correct error in (5) (e) 2., Register, October, 1991, No. 430; am. (3) (b) 1., (c) 1. a., (13) (b) 1. and (c), cr. (11) (a) 5., Register, February, 1994, No. 458, eff. 3-1-94; r. and recr. (11) (a) 2. and 5., Register, April, 1998, No. 508, eff. 5-1-98; renum. and am. (3) (b) 3. a. to be (3) (b) 3. and (3) (b) 3. b. to be (3) (b) 4., Register, April, 2000, No. 532, eff. 7-1-00; am. (3) (b) 3., (4) (a), (5) (a) and (6) (a), cr. (3) (b) 5. and Table 82.36-4a, Register, December, 2000, No. 540, eff. 1-1-01; CR 02-002: r. and recr. (3), (11) (a) 3., (13) (a) 2., (15) (a) and (b), am. (5) (e) (intro.), (10), (12), (14) and Table 82.36-4 Register April 2003 No. 568, eff. 5-1-03; CR 04-035: r. and recr. Register November 2004 No. 587, eff. 12-1-04; CR 07-069: cr. (7) (d) 10. Register February 2008 No. 626, eff. 3-1-08; CR 08-055: am. (4) (b) 3. and (8) (a) 4., r. and recr. (11) Register February 2009 No. 638, eff. 3-1-09; correction in (2), (3) (c), (4) (a), (6) (a) 1. b., 2. b., 3., (c) 1., 2., (d), (7) (c) 2., (d) 2., 4., 5., 6., 7., 10. a., (9) (b), (11), (c), (12) (b) 1., 2. b. made under s. 13.92(4) (b) 7, Stats., Register December 2011 No. 672.

Amended by, CR 23-006: cr. (3) (d), (e), am. (4) (title), (5) (a) 3., (b), cr. (6) (g) 4., am. Table 382.36-1, Table 382.36-3, (7) (d) 1., cr. (7) (d) 1m., 11., (e), am. (8) (a) 4. a., cr. (8) (a) 5., (b) 3., r. and recr. (10), r. (11), am. (12) (b) 2. a., cr. (13) (b) 1. a. to d. Register September 2023 No. 813, eff. 10-1-23; renum. (13) (b) 1. a. to d. to (13) (b) 8. to 11.; corrections in (12) (b) 2. a. made under s. 13.92 (4) (b) 7 and s. 35.17, Stats., and correction made in (3) (d) 4., (7) (d) 1m., (8) (a) 5. made under s. 35.17, Stats., Register September 2023 No. 813, eff. 10/1/2023