Sec. 32C-104. Stormwater management plan.
A. A person who conducts an activity on nonresidential property or conducts an activity for a fee or charge on residential property that has the reasonable potential to affect the quality or volume of stormwater impounded upon or released from the property, regardless of whether it is raining at the time, shall prepare a written stormwater management plan as described in this section. There is a rebuttable presumption that a stormwater management plan is not required for activities conducted within completely enclosed structures and in other areas that are permanently inaccessible to contact with stormwater or other sources of water, including run-on and run-off. A person required by this subsection to prepare a stormwater management plan shall provide the plan to the City upon the City’s request.
B. A person applying pursuant to any chapter of the Phoenix City Code for authorization, permission, or a permit to perform or engage in an activity that has the reasonable potential to affect the quality or volume of stormwater impounded upon or released from their property as a result of the activity for which approval is sought shall prepare and submit to the City a stormwater management plan.
C. A stormwater management plan must include all of the following:
1. A description of the types of all significant materials that will be on the property;
2. A description of the land use and materials management practices that could lead to the pollution of stormwater during all phases of existing and proposed land use;
3. A description of the manner in which significant materials will be used, stored, treated or disposed of; the methods to minimize, to the maximum extent practicable, the pollution of stormwater;
4. All best management practices to be utilized for the following:
a. Managing litter.
b. The use, storage, treatment, and disposal of significant materials.
c. The use, storage, and disposal of pesticides and herbicides.
d. Reducing the volume and/or velocity of discharges to a public storm drain system.
e. The use of landscape features to reduce the quantity and/or velocity of stormwater or a pollutant that may be released off site.
f. Maintenance of retention basins and other post-construction stormwater controls and facilities.
g. Underground storage and other treatment devices.
h. Maintenance and cleaning of storage areas, work areas, drives, parking lots, vehicles, and buildings.
i. Ensuring that significant materials are not exposed to direct contact with stormwater.
j. Spill prevention and remediation.
5. Any additional information concerning stormwater management and pollution prevention efforts that are or will be prepared or used to comply with any Federal, State, or local rules, regulations, or permits that relate to discharges of stormwater.
D. A stormwater management plan may apply to more than one parcel of property so long as the activities on the properties are sufficiently similar that a single plan is appropriate. A stormwater management plan must apply to all contiguous land under common ownership or control and must specifically state the address of each parcel of property subject to the plan. A stormwater management plan is not transferable to new property owners and/or operators.
E. The City Manager will not issue permits, approvals or other authorizations that require stormwater management plans as provided in subsection B of this section until the City Manager has received the applicable stormwater management plan. The City Manager may modify or revoke the City permit, approval, or authorization if significant materials are not managed in accordance with the applicable stormwater management plan.
F. The persons identified in subsections A and B of this section shall fully implement their stormwater management plan. If the affected property or activities at the property are modified in a manner that may cause a material change in the volume, velocity, or quality of stormwater released off site, the person must promptly revise and implement the person’s stormwater management plan to maintain compliance with this chapter.
G. The City Manager may require amendments to a stormwater management plan as the City Manager determines necessary to reduce or eliminate pollutant sources from reaching the public storm drain system or environment.
H. A stormwater pollution prevention plan (SWPPP) that complies with a NPDES/AZPDES permit and applicable requirements of 40 CFR Part 122 may be used as part or all of the stormwater management plan required by this section (Ord. No. G-3589, § 1; Ord. No. G-5707, 2012; Ord. No. G-7116, § 3, 2023)