The City of Eugene has enacted a Stormwater Ordinance in order to establish minimum stormwater management requirements and controls to protect and safeguard the general health, safety, and welfare of the public residing in watersheds within this jurisdiction. The City of Eugene is the permitting authority for all land disturbing activities and requires the land owner to maintain all on-site stormwater control facilities and all open space areas (e.g. parks or “green” areas) required by the approved stormwater control plan. The City of Eugene will only provide construction permits to projects that establish a plan to manage stormwater runoff occurring during the construction process. The City of Eugene, under the NPDES program, also has the authority to inspect properties for noncompliance and can issue a notice of violation (NOV) for any deficiency or infraction onsite. Property owners are responsible for the maintenance of any stormwater facilities or practices located on the property. The City of Eugene has the authority to inspect stormwater facilities and practices in order to ascertain that they are properly maintained and functioning.
1.1 Introduction
Stormwater management is a key element in maintaining and enhancing the City’s livability. There is a direct link between stormwater runoff and the City’s surface and ground water quality and quantity. As cities develop, impervious surfaces that are created increase the amount of runoff during rainfall events and prevent groundwater recharge. Stormwater runoff picks up pollutants from parking lots, roadways, and rooftops and transports them to streams, rivers, and groundwater. Without controls, these conditions cause eroded stream channels and increased levels of water pollution. Properly managing stormwater is vital to protecting our water resources for a great number of uses, including fish and wildlife habitat, recreation, and drinking water.
The Federal Clean Water Act of 1972 established a national commitment to restore and maintain the chemical, physical, and biological integrity of the nation's waters. It prohibits the discharge of pollutants into water of the United States unless the discharge is in compliance with a National Pollutant Discharge Elimination System (NPDES) Permit. The Clean Water Act requires large and medium sized (Phase I) cities such as Eugene to obtain an NPDES permit for their municipal separate stormwater sewer systems (MS4) which discharge into the nations waters. Eugene’s municipal stormwater system, comprised of catch basins, pipes, ditches and waterways, conveys runoff from properties within the City and drains directly into the Willamette River and indirectly to the river via other local waterways such as Amazon Creek. Compliance with its NPDES MS4 permit, first issued in 1994 and most recently re-issued in 2010, requires the City to implement a comprehensive stormwater management program including establishing controls on stormwater runoff from developing areas.
The City’s Stormwater Development Standards, as set forth in Eugene Code 9.6791 through 9.6797 and this Stormwater Management Manual, emphasize low-impact development practices, source control measures for certain land use and activities, and operations and maintenance practices designed to properly manage stormwater runoff and protect our water resources.
4.1 Introduction
This chapter provides the operation and maintenance requirements for stormwater management facilities designed and constructed for flood control, stormwater quality, flow control, and source control compliance continue to function in which they were designed.
This chapter also provides pre-approved operations and maintenance (O & M) Plans for various stormwater management facilities outlined in this manual. Applicants proposing to construct a manufactured treatment device are required to submit an O & M Plan prepared by the manufacturer; the plan must include O & M activities consistent with the requirements of this Chapter.
The O & M strategies in this chapter apply to all types of stormwater management facilities and related facility components identified in Chapter 2.0. Facilities that are proposed as flood control only facilities, and that are not required to meet stormwater quality or flow control standards, are not required to submit an O & M packet. However, stormwater flood control facilities are required to be operated and maintained in working condition for the life of the facility.
4.2 Private Facilities
To demonstrate that private facilities required pursuant to EC 9.6791-9.6795 will be properly operated and maintained, applicants must submit an Operation and Maintenance packet (O & M packet) with their development permit application. A complete O & M packet must be approved by the City prior to issuance of the construction permit. An O & M Packet for facilities shall include all of the following:
Copies of the approved O & M packets will be kept by the owner and on file at the Public Works Maintenance Division, 1820 Roosevelt Avenue, Eugene, OR 97402.
4.2.1 Notice of Operations & Maintenance Form
The O & M Notice gives notice to existing and future property owners that stormwater runoff from impervious surfaces constructed on the subject premises requires stormwater management facilities that are located, designed, and constructed in compliance with this Manual; and that the owners of the property are required to operate and maintain the facilities in accordance with the approved O & M Plan. Signatures on the O & M Notice must be notarized and the document must be recorded at Lane County Deeds and Records. After the City has reviewed and approved the O & M Notice, it may be submitted to the County for recording either in person or mailed, along with payment of the applicable fees, to the Lane County Clerk’s Office, Lane County Deeds and Records, 125 E. 8th Avenue, Eugene, OR 97401. The stormwater management site plan shall be incorporated by reference, yet, not recorded with the Notice of O & M Form.
The property description on the O & M Notice must be a full legal description of the property; a tax lot number cannot be used to describe the property.
The O& M Notice shall be printed on legal-sized (8.5” x 14”) paper to facilitate the recording process.
4.2.2 Operations & Maintenance Plans
Operations and maintenance plans for all stormwater facilities shall be prepared and included as part of the O & M packet. Each plan shall identify the stormwater facility, operation, maintenance, training, inspection, spill management, and pest control responsibilities. O & M Plans are not recorded with the O & M Notice; this allows the future owners of the stormwater management facilities to submit O & M activity revisions to the City without the need to re-record the O & M Plan with the County.
Pre-approved Operations & Maintenance Plans. An O & M Plan for the chosen type of stormwater facility must be included in the O & M Packet and approved as part of the stormwater management facility construction permit. Pre-approved O & M Plans identifying specific maintenance activities for the facilities approved in Chapter 2 of this Manual are provided in this chapter. Applicants may either select and use the pre-approved O & M Plans provided in this chapter or prepare an O & M Plan that incorporates the specific activities that corresponds with their chosen type of stormwater facilities.
Operations & Maintenance Plans for Proprietary Facilities. Proprietary Operations & Maintenance plans for approved proprietary facilities must describe the inspection, cleaning, operation and maintenance criteria for the facility.
O & M Plan Modifications. With approval, an O & M Plan may be modified by the facility owner any time after issuance of the construction permit. The ability to modify the O & M Plan provides facility owners an opportunity to adjust maintenance needs according to site-specific history and conditions. Letters requesting modifications to an existing O & M Plan must be submitted, along with the proposed amended O & M Plan, to the Public Works Department, 1820 Roosevelt Avenue, Eugene, OR 97402. Modification requests must demonstrate that the stormwater facilities will continue to be operated and maintained in compliance with Eugene Code 9.6797.
4.2.3 Stormwater Management Facility Inspection and Maintenance Log
Specific operation and maintenance activities for each of the different types of stormwater facilities include inspection as well as maintenance responsibilities. Facility owners must document and keep on file stormwater management facility inspection and maintenance logs. The logs must note all inspection dates, the facility components that were inspected, and any maintenance or repairs made to the facility. The O & M Plans can serve as a checklist for what should be included in the inspection log (e.g. the facility elements that need to be inspected, frequency of inspection, conditions that indicate maintenance is needed, etc.). Proprietary and manufactured stormwater facility owners are required to submit a stormwater facility maintenance log provided by the proprietor.
4.2.4 Enforcement
Pursuant to EC 6.615, stormwater management facilities constructed to comply with the requirements of EC 9.6792-9.6795 and this Manual must be properly operated and maintained for the life of the facility. The Notice of Operations and Maintenance Form will identify the parties responsible for the on-going private operation and maintenance.
Pursuant to Eugene Code 6.615, the City has the right and responsibility to inspect private facilities to assure they are being operated and maintained in accordance with the approved design, the O & M Plan, the Eugene Code and this Manual.
4.4 Source Controls
Source Control measures typically include structural and non-structural controls used to manage potential pollutants at the site and prevent them from entering the City’s stormwater system. Structural controls include Spill Control Manholes and lynch-type catch basins. Non-structural controls include street sweeping and other good housekeeping practices.
All required Source Control measures shall be operated, maintained, and inspected annually in compliance with Chapters 6, 7, and 9 as outlined in this manual. Annual inspection logs shall be kept by the owner and made available to City staff upon request.
4.5 Pre-Approved Operations and Maintenance Plans
4.5.1 Contained Planter O & M Plan
Contained Planters are free-standing plant containers placed over impervious surfaces such as patios, sidewalks, and rooftops that intercept and filter rainfall that would otherwise contribute to stormwater runoff from the underlying impervious surface.
Contained Planters may be prefabricated pots of various dimensions or may be constructed in place and have an infinite variety of shapes and sizes. Contained Planters intercept precipitation only, not stormwater runoff from other surfaces. Drainage is allowed through the bottom of the Contained Planter onto the impervious surface.
All facility components and vegetation shall be inspected for proper operations and structural stability. These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation and 2 times per year thereafter.
Training and/or Written Guidance information for operating and maintaining Contained Planters shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
4.5.2 Eco-Roof O & M Plan
Eco-Roofs are lightweight vegetated roof systems used in place of conventional roofs. Eco-Roofs provide stormwater management by capturing, filtering, and, depending on the season, evapotranspirates 10 to 100 percent of the precipitation while providing aesthetic and energy conservation benefits.
All facility components, including the growth medium, vegetation, drains, membranes, and roof structure shall be inspected for proper operations, integrity of the waterproofing, and structural stability throughout the life of the Eco-Roof. All elements shall be inspected once a month from April through September.
Aesthetics of the Eco-Roof shall be maintained as an asset to the property owner and community. Evidence of damage or vandalism shall be repaired and accumulation of trash or debris shall be removed upon discovery.
Training and/or Written Guidance information for operating and maintaining Eco-Roofs shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Irrigation can be accomplished either through hand watering or automatic sprinkler systems. If automatic sprinklers are used, manufacturer’s instructions for operations and maintenance shall be followed.
Spill Prevention Measures from mechanical systems located on Eco-Roofs shall be exercised when handling substances that can contaminate stormwater. Releases of pollutants shall be corrected as soon as identified.
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
4.5.3 Permeable Pavement O & M Plan
Permeable Pavements are pervious and porous load bearing structures with an underlying stone reservoir that temporarily stores and filters surface runoff before infiltrating into the subsoil or being collected in underlying drain pipes and being discharged off-site. Permeable Pavements include, but are not limited to, pervious concrete, asphalt, plastic rings planted with grass, stone and block pavers. The system generally consists of a permeable wearing course surface placed upon layered permeable base materials.
All facility components shall be inspected for proper operations and structural stability, at a minimum, quarterly for the first 2 years from the date of installation, 2 times per year thereafter, and within 48 hours after each major storm event.
Training and/or Written Guidance information for operating and maintaining Permeable Pavement shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Spill Prevention Measures shall be exercised on site when handling substances that contaminate stormwater. Release of pollutants on Permeable Pavements shall be corrected as soon as identified.
A spill prevention plan shall be implemented at all non-residential sites and in areas where there is likelihood of spills from hazardous materials. However, virtually all sites, including residential and commercial, present potential danger from spills. All homes contain a wide variety of toxic materials including gasoline for lawn mowers, antifreeze for cars, solvents, pesticides, and cleaning aids that can adversely affect storm water if spilled. It is important to exercise caution when handling substances that can contaminate stormwater. Releases of pollutants shall be corrected as soon as identified.
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
4.5.4 Tree Credit O & M Plan
Trees intercept precipitation and hold water on the leaves and branches and allow it to evaporate, retain runoff and dissipate the energy of runoff. They also provide shade, providing two direct benefits. First, hard surfaces are protected from direct solar exposure, which reduces heat gain. The less heat gain there is in pavement, the less heat is absorbed by stormwater as it flows over the surface. Second, by shading pavement, the trees help reduce or minimize air temperature increases caused by the hot pavement. Cooler air may help prevent stream temperature increases associated with air temperatures.
These functions are most measurable for storms of less than 0.5 inches over 24 hours. While deciduous trees are not as effective during winter months, evergreen trees are effective year round for these smaller storms and portions of larger storms. Generally, large trees with small leaves are the most efficient rainfall interceptors. Trees also facilitate stormwater infiltration and groundwater recharge.
Trees used to meet stormwater management requirements shall be kept on a site and maintained properly to ensure continued stormwater benefits. Trees shall be inspected 2 times a year and within 48 hours of a major wind or storm event.
Inspection Logs shall be kept by the Tree owner demonstrating the following items have been inspected and are being maintained properly:
Irrigation shall be implemented during the establishment period to ensure Tree survival. Hand watering is preferred, but a drip-irrigation system may be used.
4.5.5 Filter Strip O & M Plan
Filter Strips are gently sloped vegetated or grassed areas that stormwater runoff is directed to flow over and filter through. Stormwater enters the filter as sheet flow from an impervious surface or is converted to sheet flow using a level spreader. Pollutants are removed through filtration and sedimentation.
All facility components and vegetation shall be inspected for proper sheet flow and stability. These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation, 2 times per year thereafter, and within 48 hours after each major storm event.
Training and/or Written Guidance information for operating and maintaining vegetated filters shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Spill Prevention Measures shall be exercised on site when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified.
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
4.5.6 Pond O & M Plan
Ponds are constructed ponds with a permanent pool of water. Pollutants are removed from stormwater through gravitational settling and biologic processes. Extended Wet Ponds are constructed ponds with a permanent pool of water and open storage space above for short-term detention of large storm events. Pollutants are removed from stormwater through gravitational settling and biologic processes. Dry Detention Ponds are constructed ponds with temporary storage for the detention of large storm events. The stormwater is stored and released slowly over a matter of hours.
All facility components, vegetation, and source controls shall be inspected for proper operations and structural stability. Gauges located at the opposite ends of the wet pond shall be maintained to monitor sedimentation. Gauges shall be checked 2 times per year.
These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation, and 2 times per year thereafter, and within 48 hours after each major storm event.
Training and/or Written Guidance information for operating and maintaining Ponds shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Vegetation producing foul odors shall be eliminated. Dead vegetation shall be removed to maintain less than 10% of area coverage or when wet pond function is impaired. Vegetation shall be replaced within 3 months, or immediately if required to maintain cover density and control erosion where soils are exposed. Vegetation, large shrubs or trees that limit access or interfere with wet pond operation shall be pruned or removed. Grass (where applicable) shall be mowed to 4”-9” high and grass clippings shall be removed.
Spill Prevention Measures shall be exercised on site when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified. Gravel or ground cover shall be added if erosion occurs, e.g., due to vehicular or pedestrian traffic.
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
4.5.7 Rain Garden O & M Plan
Rain Gardens are vegetated surface reservoirs used to collect and treat stormwater runoff from impervious surfaces by allowing the pollutants to settle and filter out as the water percolates through vegetation and soil mediums before infiltrating into the ground below or being piped to its downstream destination.
Rain Gardens can be used to help fulfill a site’s required landscaping area requirement and should be integrated into the overall site design. Numerous design variations of shape and planting scheme can be used to fit the character of a site.
The reservoir basin shall infiltrate stormwater within 24 hours. All facility components and vegetation shall be inspected for proper operations and structural stability, at a minimum, quarterly for the first 2 years from the date of installation, 2 times per year thereafter, and within 48 hours after each major storm event.
Training and/or Written Guidance information for operating and maintaining vegetated infiltration basins shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Spill Prevention Measures shall be exercised on site when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified.
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
4.5.8 Sand Filter O & M Plan
Sand Filters consist of a layer of sand in a structural box used to trap pollutants. The water filters through the sand and then infiltrates into the ground or has an underdrain system that conveys the filtered stormwater to a discharge point.
All facility components, vegetation, and source controls shall be inspected for proper operations and structural stability. These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation, and 2 times per year thereafter, and within 48 hours after each major storm event.
Training and/or Written Guidance information for operating and maintaining Sand Filters shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Spill Prevention Measures shall be exercised on site when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified.
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
4.5.9 Stormwater Planter O & M Plan
Stormwater Planters are infiltration and filtration stormwater facilities that can provide flood control, flow control and stormwater quality benefits. Stormwater Planters are walled vegetated surface reservoirs used to collect and treat stormwater runoff from impervious surfaces by allowing pollutants to settle and filter out as the water percolates through the vegetation and soil mediums before infiltrating into the ground below or being piped to its downstream destination.
Stormwater Planters can be used to help fulfill a site’s required landscaping area requirement and should be integrated into the overall site design. Numerous design variations of shape and planting scheme can be used to fit the character.
All facility components and vegetation shall be inspected for proper operations and structural stability. These inspections shall occur, at a minimum, quarterly for the first 2 years from the date of installation, 2 times per year thereafter, and within 48 hours after each major storm event.
Training and/or Written Guidance information for operating and maintaining Stormwater Planters shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Spill Prevention Measures shall be exercised on site when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified.
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
4.5.10 Swale O & M Plan
Swales are filtration stormwater conveyance facilities that provide flow control and stormwater quality benefits. Swales are long and narrow vegetated and grassed depressions used to collect and convey stormwater runoff which allows pollutants to settle and filter out as the water flows through the facility.
All facility components, vegetation, and source controls shall be inspected for proper operations and structural stability, at a minimum, quarterly for the first 2 years from the date of installation, 2 times per year thereafter, and within 48 hours after each major storm event.
Training and/or Written Guidance information for operating and maintaining Swales shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Spill Prevention Measures shall be exercised on site when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified.
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
4.5.11 Spill Control Manhole O & M Plan
Spill Control Manholes are source control devices specific to controlling oil releases. Spill Control Manholes rely on passive mechanisms that take advantage of oil being lighter than water. Oil floats to the surface and is periodically removed. Spill Control Manholes are simple underground manhole designs with a “T” outlet designed to trap small spills. Spill Control Manholes must be used in conjunction with other water quality systems to meet stormwater quality requirements.
The Spill Control Manhole shall be inspected and cleaned quarterly.
Training and/or Written Guidance information for operating and maintaining Spill Control Manholes shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Source Control Measures typically include structural and non-structural controls. Nonstructural controls can include street sweeping and other good housekeeping practices. Source Control measures shall be maintained and documented.
Spill Prevention Measures shall be exercised on site when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified.
Spill Prevention procedures require high-risk site users to reduce the risk of spills. However, virtually all sites, including residential and commercial, present dangers from spills. Homes contain a wide variety of toxic materials including gasoline for lawn mowers, antifreeze for cars, nail polish remover, pesticides, and cleaning aids that can adversely affect storm water if spilled. It is important to exercise caution when handling substances that can contaminate stormwater.
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
4.5.12 Structural Detention Facility O & M Plan
Structural Detention Facilities are flow control devices. Structural detention facilities include tanks, vaults, and oversized pipes designed to fill with stormwater during large storm events and slowly release the runoff over a number of hours. There are numerous components to each system; inlet pipes conveying stormwater into the detention facility, detention chambers storing stormwater during storm events, and outlet drains restricting the flow out of the detention chamber.
Underground Structural Detention Facilities shall be inspected quarterly and within 48 hours after each major storm event.
Training and/or Written Guidance information for operating and maintaining Detention Facilities shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Spill Prevention Measures shall be exercised when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified.
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
4.5.13 Drywell O & M Plan
Drywells are structural subsurface facilities with perforated sides or bottom, used to inject stormwater runoff into the ground. Drywells systems consist of concrete or plastic manhole section with many small holes in the sides to allow stormwater to infiltrate into the surrounding soil.
The Drywell system shall be inspected and cleaned quarterly and within 48 hours after each major storm event. Ponding around the catch basins or sedimentation manhole or drywell lids may indicate that the drywell is failing due to siltation, or the clogging of the sediment pores surrounding the Drywell.
Training and/or Written Guidance information for operating and maintaining drywell systems shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Spill Prevention Measures shall be exercised when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified.
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
4.5.14 Soakage Trench O & M Plan
Soakage Trenches are infiltrating flood control devices. Soakage Trenches are linear excavations backfilled with sand and gravel injecting stormwater runoff into the ground recharging groundwater. There are various components within the system – inlet piping, aggregate storage basin and perforated piping. The trench surface may be covered with grating, stone, sand, or a grassed cover with a surface inlet and may also be installed under hard surfaces such as driveways.
All facility components, vegetation, and source controls shall be inspected for proper operations and structural stability. These inspections shall occur, at a minimum, quarterly for the first two years from the date of installation, then two times per year afterwards, or within 48 hours after each major storm.
Training and/or Written Guidance information for operating and maintaining Soakage Trenches shall be provided to all property owners and tenants. A copy of the O & M Plan shall be provided to all property owners and tenants.
Inspection Logs shall be kept by the facility owner demonstrating the following items have been inspected and are being maintained properly:
Spill Prevention Measures shall be exercised on site when handling substances that contaminate stormwater. Releases of pollutants shall be corrected as soon as identified.
Non-Chemical Pest Control measures shall be taken to prevent development of insects, mosquitoes, and rodents.
Stormwater Permit Application Forms and Fees