[Added 12-13-2021 by Ord. No. 2021-35]
(a) 
Purpose. The purpose of this section is to prohibit illicit connections to the MS4, so as to protect public health, safety and welfare, and to prescribe penalties for the failure to comply.
(b) 
Prohibited Conduct. No person shall discharge or cause to be discharged through an illicit connection to the MS4 any domestic sewage, non-contact cooling water, process wastewater, or other industrial waste (other than stormwater).
[Added 12-13-2021 by Ord. No. 2021-35]
(a) 
Purpose. This section requires the retrofitting of existing storm drain inlets which are in direct contact with repaving, repairing, reconstruction, or resurfacing or alterations of facilities on private property, to prevent the discharge of solids and floatables (such as plastic bottles, cans, food wrappers and other litter) to the MS4 so as to protect public health, safety and welfare, and to prescribe penalties for the failure to comply.
(b) 
Prohibited Conduct. No person in control of private property (except a residential lot with one single-family house) shall authorize the repaving, repairing (excluding the repair of individual potholes), resurfacing (including top coating or chip sealing with asphalt emulsion or a thin base of hot asphalt), reconstructing, or altering any surface that is in direct contact with an existing storm drain inlet on that property unless the storm drain inlet either:
(1) 
Already meets the design standard in Subsection 33-4(c) below to control passage of solid and floatable materials; or
(2) 
Is retrofitted or replaced to meet the standard in Subsection 33-4(c) below prior to the completion of the project.
As used in this Section 33-4, "storm drain inlet" shall mean an opening in a storm drain used to collect stormwater runoff and includes, but is not limited to, a grate inlet, curb-opening inlet, slotted inlet and combination inlet.
(c) 
Design Standard. Storm drain inlets identified in Subsection 33-4(b) above shall comply with the following standard to control passage of solid and floatable materials through storm drain inlets. For purposes of this paragraph, "solid and floatable materials" shall mean sediment, debris, trash and other floating, suspended or settleable solids. For exemptions to this standard see Subsection 33-4(c)(5) below.
(1) 
Design engineers shall use either of the following grates whenever they use a grate in pavement or another ground surface to collect stormwater from that surface into a storm drain or surface water body under that grate:
a. 
The New Jersey Department of Transportation (N.J.D.O.T.) bicycle safe grate, which is described in Chapter 2.4 of the N.J.D.O.T. Bicycle Compatible Roadways and Bikeways Planning and Design Guidelines; or
b. 
A grate with individual clear spaces no more than seven square inches and no greater than one half inch across the smallest dimension.
(2) 
Examples of grates subject to this standard include grates in grate inlets, the grate portion (non-curb-opening portion) of combination inlets, grates on storm sewer maintenance holes, ditch grates, trench grates and grates of spacer bars in slotted drains.
(3) 
Examples of ground surfaces include surfaces of roads (including bridges), driveways, parking areas, bikeways, plazas, sidewalks, lawns, fields, open channels and stormwater basin floors.
(4) 
Whenever design engineers use a curb-opening inlet, the clear space in that curb opening (or each individual clear space, if the curb opening has two or more clear spaces) shall have an area of no more than seven inches or be no greater than two inches across the smallest dimension.
(5) 
This standard does not apply:
a. 
Where the municipal engineer agrees that this standard would cause inadequate hydraulic performance that could not practicably be overcome by using additional or larger storm drain inlets that meet these standards;
b. 
Where flows are conveyed through any device (e.g., end of pipe netting facility, manufactured treatment device or a catch basin hood) that is designed, at a minimum, to prevent delivery of all solid and floatable materials that could not pass through one of the following:
1. 
A rectangular space 4 5/8 inches long and 1 1/2 inches wide (this option does not apply for outfall netting facilities); or
2. 
A bar screen having a bar space of 1/2 inches.
c. 
Where flows are conveyed through a trash rack that has parallel bars with one inch spacing between the bars; or
d. 
Where the New Jersey Department of Environmental Protection determines, pursuant to the New Jersey Register of Historic Places Rules at N.J.A.C. 7:4-7.2(c), that action to meet this standard is an undertaking that constitutes an encroachment or will damage or destroy the New Jersey Register listed historic property.
[Added 12-13-2021 by Ord. No. 2021-35]
(a) 
Purpose. The purpose of this section is to prohibit the spilling, dumping, or disposal of materials other than stormwater to the MS4, so as to protect public health, safety and welfare, and to prescribe penalties for the failure to comply.
(b) 
Prohibited Conduct.
(1) 
The spilling, dumping, or disposal of materials other than stormwater to the MS4 is prohibited.
(2) 
The spilling, dumping, or disposal of materials other than stormwater in such a manner as to cause the discharge of pollutants to the MS4 is also prohibited.
(3) 
No water cooled air conditioner shall be connected with the MS4. In lieu of draining into the MS4, water cooled air conditioners shall be provided with circulating water towers or alternative means of water disposal other than use of the MS4.
(c) 
Exceptions to Prohibition:
(1) 
Water line flushing and discharges from potable water sources.
(2) 
Uncontaminated ground water (e.g., infiltration, crawl space or basement sump pumps, foundation or footing drains, rising ground waters).
(3) 
Air conditioning condensate (excluding contact and non-contact cooling water).
(4) 
Irrigation water (including landscape and lawn watering runoff).
(5) 
Flows from springs, riparian habitats and wetlands, water reservoir discharges and diverted stream flows.
(6) 
Residential car washing water, and residential swimming pool discharges.
(7) 
Sidewalk, driveway and street wash water.
(8) 
Flows from fire-fighting activities.
(9) 
Flows from rinsing of the following equipment with clean water:
a. 
Beach maintenance equipment immediately following their use for their intended purposes; and
b. 
Equipment used in the application of salt and de-icing materials immediately following salt and de-icing material applications. Prior to rinsing with clean water, all residual salt and de-icing materials must be removed from equipment and vehicles to the maximum extent practicable using dry cleaning methods (e.g., shoveling and sweeping). Recovered materials are to be returned to storage for reuse or properly discarded. Rinsing of equipment, as noted in the above situation is limited to exterior, undercarriage, and exposed parts and does not apply to engines or other enclosed machinery.
[Added 12-13-2021 by Ord. No. 2021-35]
No sewage, refuse, storm water, surface water or other fluids shall be directed or conducted, directly or indirectly, over, across or under any sidewalk or into any gutter or public street, except as provided in this section; but nothing in this section shall be construed to prohibit the continued use heretofore of existing means of directing or conducting storm or surface water over, across or under any sidewalk or into any gutter or public street.
Where, by reason of close proximity of a catchbasin, the proposed use of a gutter for storm water and surface water drainage will not cause a significant loss of use of the gutter to other persons or for other purposes, the municipal engineer, upon written application therefor, may issue a permit for the drainage of storm water or surface water under a sidewalk and into the gutter. Any such permit shall be revocable by the municipal engineer upon 90 days' notice.
[Added 12-13-2021 by Ord. No. 2021-35]
A sump pump, roof drain or area drain shall discharge in accordance with the following requirements:
(a) 
The pump or drain shall have a permanent piping installation to direct flow away from the building structure and at a location which will minimize infiltration to the building foundation and/or public sanitary sewer system. The new pump or drain connection shall not discharge water onto any adjacent property. In addition, the pump or drain connection shall not discharge within 10 feet of a property line unless approved by the municipal engineer.
(b) 
The pump or drain discharge pipe shall not discharge water, either directly or indirectly, to a public right-of-way or across a public sidewalk without permission from the municipal engineer. Said engineer, when evaluating a request to redirect flow from a pump or a drain shall require the submittal of the following information:
(1) 
A written proposal noting thereon how the flow is intended to be redirected to discharge to a storm sewer or the gutter line of a street so that icing or street erosion conditions will not occur.
(2) 
A sketch submitted showing the connection of the pump or drain line to a storm sewer; submission of any street opening permit required, if work is to be done in the municipal right-of-way.
(c) 
No pump or drain connection shall be made to the sanitary sewer system.
[Added 12-13-2021 by Ord. No. 2021-35]
No stormwater management practice which is designed for the infiltration of stormwater runoff into the ground shall be permitted to be constructed within 10 feet of any sanitary sewer system pipe, structure, lateral, or other appurtenance. A groundwater mounding analysis must be conducted for proposed stormwater management practices designed to infiltrate runoff. If said mounding analysis indicates that groundwater will rise within one foot of a sanitary sewer system pipe, structure, lateral, or other appurtenance, the stormwater management practice design must or altered or the sanitary sewer system must be otherwise protected from infiltration of groundwater into the sanitary sewer system, including means of preventing groundwater from flowing along the sanitary sewer system trench.
[Added 11-21-2023 by Ord. No. 2023-34]
(a) 
Purpose. The purpose of this section is to prevent stored salt and other solid de-icing materials from being exposed to stormwater.
This Section B33-8A establishes requirements for the storage of salt and other solid de-icing materials on properties not owned or operated by the municipality (privately-owned), including residences, in Princeton to protect the environment, public health, safety and welfare.
(b) 
Deicing Material Storage Requirements.
(1) 
Temporary outdoor storage of de-icing materials in accordance with the requirements below is allowed between October 15th and April 15th:
a. 
Loose materials shall be placed on a flat, impervious surface in a manner that prevents stormwater run-through;
b. 
Loose materials shall be placed at least 50 feet from surface water bodies, storm drain inlets, ditches and/or other stormwater conveyance channels;
c. 
Loose materials shall be maintained in a cone-shaped storage pile. If loading or unloading activities alter the cone-shape during daily activities, tracked materials shall be swept back into the storage pile, and the storage pile shall be reshaped into a cone after use;
d. 
Loose materials shall be covered as follows:
1. 
The cover shall be waterproof, impermeable, and flexible;
2. 
The cover shall extend to the base of the pile(s);
3. 
The cover shall be free from holes or tears;
4. 
The cover shall be secured and weighed down around the perimeter to prevent removal by wind; and
5. 
Weight shall be placed on the cover(s) in such a way that minimizes the potential of exposure as materials shift and runoff flows down to the base of the pile.
(i) 
Sandbags lashed together with rope or cable and placed uniformly over the flexible cover, or poly-cord nets provide a suitable method. Items that can potentially hold water (e.g., old tires) shall not be used;
e. 
Containers must be sealed when not in use; and
f. 
The site shall be free of all de-icing materials between April 16th and October 14th.
(2) 
De-icing materials should be stored in a permanent structure if a suitable storage structure is available. For storage of loose de-icing materials in a permanent structure, such storage may be permanent, and thus not restricted to October 15 - April 15.
(3) 
All temporary and permanent structures shall also comply with all provisions of this Code, including but not limited to all construction, building and land use requirements.
(4) 
The property owner, or owner of the de-icing materials if different, shall designate a person(s) responsible for operations at the site where these materials are stored outdoors, and who shall document that weekly inspections are conducted to ensure that the conditions of this article are met. Inspection records shall be kept on site and made available to the municipality upon request.
a. 
Residents who operate businesses from their homes that utilize de-icing materials stored there are required to perform weekly inspections.
(c) 
Exemptions. Residents may store de-icing materials outside in a solid-walled, closed container that prevents precipitation from entering and exiting the container, and which prevents the de-icing materials from leaking or spilling out. Under these circumstances, weekly inspections are not necessary, but repair or replacement of damaged or inadequate containers shall occur within two weeks.
If containerized (in bags or buckets) de-icing materials are stored within a permanent structure, they are not subject to the storage and inspection requirements in subsection B33-8A(b) above. Piles of de-icing materials are not exempt, even if stored in a permanent structure.
This Section B33-8A does not apply to facilities where the stormwater discharges from de-icing material storage activities are regulated under another NJPDES permit.
(d) 
Enforcement. This Section B33-8A shall be enforced by the officers and/or personnel identified in Section B33-9 of this chapter.
(e) 
Violations and Penalties. If the municipal enforcing officer(s) or personnel find any person to be in violation of the provisions of this Section B33-8A, said official(s) or personnel shall provide written notice of same to the person in violation. The person shall have 72 hours of the issuance of the written notice to complete corrective action necessary to abate the violation. Repeat violations and/or failure to complete corrective action within the time permitted shall result in penalties and fines as set forth in Section B33-10 of this chapter.