Borough of Conshohocken, PA PROHIBITIONS

[Ord. No. 10-2022, 7/20/2022]

Any drain or conveyance, whether on the surface or subsurface, that allows any nonstormwater discharge including sewage, process wastewater, and wash water to enter a regulated small MS4 or to enter the surface waters of this commonwealth is prohibited.

Any drain or conveyance connected from a commercial or industrial land use to the regulated small MS4 which has not been documented in plans, maps, or equivalent records and approved by the Borough.

No person shall allow, or cause to allow, discharges into a regulated small MS4, or discharges into waters of this commonwealth, which are not composed entirely of stormwater, except: 1) as provided in Subsection 4 below; and 2) discharges authorized under a state or federal permit.

The following discharges are authorized unless they are determined to be significant contributors to pollution of a regulated small MS4 or to the waters of this commonwealth:

Discharges or flows from firefighting activities.

Discharges from potable water sources including waterline flushing and fire hydrant flushing, if such discharges do not contain detectable concentrations of total residual chlorine (TRC).

Noncontaminated irrigation water, water from lawn maintenance, landscape drainage and flows from riparian habitats and wetlands.

Diverted stream flows and springs.

Noncontaminated pumped groundwater and water from foundation and footing drains and crawl space pumps.

Noncontaminated HVAC condensation and water from geothermal systems.

Residential (i.e., not commercial) vehicle wash water where cleaning agents are not utilized.

Noncontaminated hydrostatic test water discharges, if such discharges do not contain detectable concentrations of TRC.

In the event that the municipality or DEP determines that any of the discharges identified in Subsection 4 significantly contribute pollutants to the Borough's separate storm sewer system or to the waters of this commonwealth, the municipality or DEP will notify the responsible person(s) to cease the discharge.

[Ord. No. 10-2022, 7/20/2022]

Roof drains and sump pumps shall discharge to infiltration or vegetative BMPs wherever feasible. Where it is more advantageous to connect directly to streets or storm sewers, connections may be permitted on a case-by-case basis as determined by the Borough.

Roof drain and sump pump pipes shall not discharge water over a sidewalk but shall extend under the sidewalk to the gutter.

A solid lid cleanout shall be provided for all roof drains and sump pumps, located within the lot between the contributing building or structure and the right-of-way.