Editor's Note — The operations and maintenance program for the prevention and reduction of pollution in storm water runoff from municipal operations within the city of Overland, Missouri, St. Louis County Missouri was hereby approved by ord. no. 2012-13, adopted May 14, 2012. Copy of said operations and maintenance program is on file in the city offices and incorporated herein.
[Ord. No. 2008-30 §1, 7-14-2008]
During the construction process, soil is highly vulnerable to erosion by wind and water. Eroded soil endangers water resources by reducing water quality and causing the siltation of aquatic habitat for fish and other desirable species. Deposits of eroded soil also necessitate maintenance of sewers and ditches and the dredging of lakes. In addition, clearing and grading during construction cause the loss of native vegetation necessary for terrestrial and aquatic habitat. Construction activities also utilize materials and generate wastes, which if not properly controlled can pollute receiving waters.
The purpose of this Chapter is to safeguard persons, protect property and prevent damage to the environment in the City of Overland. This Chapter will also promote the public welfare by guiding, regulating and controlling the design, construction, use and maintenance of any development or other activity that disturbs or breaks the topsoil or results in the movement of earth on land in the City.
[Ord. No. 2008-30 §1, 7-14-2008]
For the purposes of this Chapter, the following terms, phrases, words and their derivations shall have the meanings given herein.
- BEST MANAGEMENT PRACTICES OR BMPS
- Practices, procedures or a schedule of activities to reduce the amount of sediment and other pollutants in storm water discharges associated with construction and land disturbance activities.
- The City of Overland, Missouri.
- Any activity that removes the vegetative surface cover.
- CONSTRUCTION OR LAND DISTURBANCE SITE OR SITE
- A parcel of land or a contiguous combination thereof, where grading work is performed as part of a single unified plan of development.
- DEPARTMENT OF PUBLIC WORKS
- The City of Overland, Missouri, Department of Public Works.
- DIRECTOR OF PUBLIC WORKS
- The Director of the City of Overland, Missouri, Department of Public Works.
- DRAINAGE WAY
- Any channel that conveys surface runoff through a site.
- The wearing away of land surface through the action of wind or water.
- EROSION CONTROL
- Any BMP that prevents or minimizes erosion.
- Reshaping the ground surface through excavation and/or fill of material, including the resulting conditions.
- LAND DISTURBANCE ACTIVITIES
- Any activity such as clearing, grading or any other action which results in removal of the natural site vegetation and destruction of the root zone or otherwise results in leaving the ground surface exposed to soil erosion through the action of wind or water.
- PERIMETER CONTROL
- A barrier that prevents sediment from leaving a site by filtering sediment-laden runoff or diverting it to a sediment trap or basin.
- Clearing a parcel of land in distinct phases, with the stabilization of each phase substantially completed before the clearing of the next.
- RUNOFF COEFFICIENT
- The fraction of total rainfall that will appear at the outfalls from a site.
- SEDIMENT CONTROL
- Any BMP that prevents eroded sediment from leaving a site.
- SITE DISTURBANCE PERMIT
- A permit issued by the Department of Public Works authorizing disturbance of the land at a specific site subject to conditions stated in the permit.
- The use of BMPs that prevent exposed soil from eroding including improvements and structures for the control of erosion, runoff and grading.
- START OF CONSTRUCTION
- The first (1st) land-disturbing activity associated with a development, including land preparation such as clearing, grading and filling; installation of streets and walkways; excavation for basements, footings, piers or foundations; erection of temporary forms; and installation of accessory buildings such as garages.
- STORM WATER POLLUTION PREVENTION PLAN (SWPPP)
- A management plan, the purpose of which is to ensure the design, implementation, management and maintenance of BMPs in order to reduce the amount of sediment and other pollutants in storm water discharges associated with land disturbance activities, comply with the standards of the Department of Public Works and ensure compliance with the terms and conditions of the applicable State permits, including adherence to the land disturbance program contained in the Missouri State issued MS4 (Municipal Storm Sewer) NPDES (National Pollutant Discharge Elimination System) permit.
- A natural or artificial channel or body of water, including, but not limited to, lakes, ponds, rivers, streams, ditches and other open conveyances, that carries surface runoff water either continuously or intermittently.
[Ord. No. 2008-30 §1, 7-14-2008]
Any person who intends to conduct any land disturbance activity that will disturb forty-three thousand five hundred sixty (43,560) or more square feet must obtain a site disturbance permit from the Department of Public Works.
Any person who buys a lot for construction from a person who has been issued a permit under Subsection (A) above (unless purchased for the purpose of building their own private residence) must obtain a separate site disturbance permit from the Department of Public Works unless the original permittee retains responsibility for the land disturbance activities on the sold lot.
Each permit application shall bear the name(s) and address(es) of the owner and developer of the site and of any consulting firm retained by the applicant, together with the name of the applicant's principal contact at such firm, and shall be accompanied by a filing fee. The fees shall be fifty dollars ($50.00) for disturbances of two (2) acres or less, one hundred dollars ($100.00) for disturbances of two (2) to five (5) acres, one hundred fifty dollars ($150.00) for disturbances of five (5) to ten (10) acres and two hundred dollars ($200.00) for sites over ten (10) acres in size. If the permit applicant is also required to obtain an excavation permit pursuant to Section 525.220 of this Code, the Director of Public Works may waive the filing fee required under this Subsection for a site disturbance permit application.
Each permit application shall be accompanied by a Storm Water Pollution Prevention Plan ("SWPPP") prepared for the specific site by or under the direction of a qualified professional and a statement that any land clearing, construction or development involving the movement of earth shall be in accordance with the Storm Water Pollution Prevention Plan.
The permit applicant will be required to file with the City a faithful performance bond, cash escrow, letter of credit or other improvement security in an amount deemed sufficient by the City to cover all costs of improvements, landscaping and maintenance of improvements for such period as specified by the City and engineering and inspection costs to cover the cost of failure or repair of improvements installed on the site in an amount to be determined by the Director of Public Works but no less than one thousand dollars ($1,000.00). In the event the permit applicant is also required to file a bond or cash escrow with the City pursuant to Section 525.220(D), only one (1) bond, cash escrow, letter of credit or other improvement security shall be required to be in an amount sufficient to meet the requirements of both this Subsection and Section 525.220(D).
The permit applicant will be required to obtain a land disturbance permit issued by the Missouri Department of Natural Resources for any site where one (1) acre or more of land will be disturbed and to furnish a copy to the Director of Public Works before beginning any site work authorized by a City permit. This requirement applies to sites of less than one (1) acre that are part of a larger common plan that will ultimately disturb one (1) acre or more.
The Director of Public Works may require the use of such BMPs as he shall deem appropriate as a condition of issuing a building or other permit for activities that do not require a permit under this Section because they will disturb less than forty-three thousand five hundred sixty (43,560) or more square feet.
[Ord. No. 2008-30 §1, 7-14-2008]
The design requirements in Section 521.050 shall be taken into consideration when developing the Storm Water Pollution Prevention Plan and the plan shall include the following:
Name, address and telephone number of the site owner and the name, address and telephone number of the individual who will be in overall responsible charge of construction/development activities at the site.
Site address or location description.
A site map showing the outlines of the total project area, the areas to be disturbed, existing land uses, locations and names of surface water bodies, locations of temporary and permanent BMPS and such other information as the City Department of Public Works may require.
Existing contours of the site and adjoining strips of off-site property and proposed contours after completion of the proposed grading and development, based on United States Geological Survey datum, with established elevations at buildings, walks, drives, street and roads; and information on necessary clearing and grubbing, removal of existing structures, excavating, filling, spreading and compacting.
A natural resources map identifying soils, forest cover and resources protected under other Chapters of the Municipal Code of the City of Overland.
An estimate of the runoff coefficient of the site prior to disturbance and the runoff coefficient after the construction addressed in the permit application is completed.
Estimated grading quantity.
Details of the site drainage pattern both before and after major grading activities.
Construction access to site.
Description of BMPs to be utilized to control erosion and sedimentation during the period of land disturbance.
Description of BMPs to be utilized to prevent other potential pollutants such as construction wastes, toxic or hazardous substances, petroleum products, pesticides, herbicides, site litter, sanitary wastes and other pollutants from entering the natural drainage ways during the period of construction and land disturbance.
Description of BMPs that will be installed during land disturbance to control pollutants in storm water discharges that will occur after land disturbance activity has been completed.
Location of temporary off-street parking and wash-down area for related vehicles.
Sources of off-site borrow material or spoil sites and all information relative to haul routes, trucks and equipment.
The anticipated sequence of construction and land disturbance activities including installation of BMPS, removal of temporary BMPs, stripping and clearing; rough grading; construction of utilities, infrastructure and buildings; and final grading and landscaping. Sequencing shall identify the expected date(s) on which clearing will begin, the estimated duration of exposure of cleared areas, areas of clearing, installation of temporary erosion and sediment control measures and establishment of permanent vegetation.
All erosion and sediment control measures necessary to meet the objectives of this Chapter throughout all phases of construction and after completion of site development. Depending upon the complexity of the project, the drafting of intermediate plans may be required at the close of each season.
Seeding mixtures and rates, types of sod, method of seedbed preparation, expected seeding dates, type and rate of lime and fertilizer application and kind and quantity of mulching for both temporary and permanent vegetative control measures.
Provisions for maintenance of control facilities, including easements and estimates of the cost of maintenance.
Plans for responding to any loss of contained sediment to include the immediate actions the permittee will take in case of a containment failure. This plan must include documentation of actions and mandatory reporting to the City Department of Public Works.
Schedules and procedures for routine inspections of any structures provided to prevent pollution of storm water or to remove pollutants from storm water and of the site in general to ensure all BMPs are continually implemented and are effective.
The permittee shall amend the Storm Water Pollution Prevention Plan whenever:
Design, operation or maintenance of BMPs is changed;
Design of the construction project is changed that could significantly affect the quality of the storm water discharges;
Site operator's inspections indicate deficiencies in the SWPPP or any BMP;
Inspections by the City or by the Missouri Department of Natural Resources indicate deficiencies in the SWPPP or any BMP;
The SWPPP is determined to be ineffective in significantly minimizing or controlling erosion or excessive sediment deposits in streams or lakes;
The SWPPP is determined to be ineffective in preventing pollution of waterways from construction wastes, chemicals, fueling facilities, concrete truck washouts, toxic or hazardous materials, site litter or other substances or wastes likely to have an adverse impact on water quality;
Total settleable solids from a storm water outfall exceeds one-half (0.5) ml/L/hr if the discharge is within the prescribed proximity of a "valuable resource water" as defined by the MDNR;
Total settleable solids from a storm water outfall exceeds two and one-half (2.5) ml/L/hr for any other outfall; or
The City or the Missouri Department of Natural Resources determines violations of water quality standards may occur or have occurred.
The permittee shall:
Notify all contractors and other entities (including utility crews, City employees or their agents) who will perform work at the site of the existence of the SWPPP and what actions or precautions shall be taken while on site to minimize the potential for erosion and the potential for damaging any BMP;
Determine the need for and establish training programs to ensure that all site workers have been trained, as a minimum, in erosion control, material handling and storage and housekeeping;
Provide copies of the SWPPP to all parties who are responsible for installation, operation or maintenance of any BMP; and
Maintain a current copy of the SWPPP on the site at all times.
[Ord. No. 2008-30 §1, 7-14-2008]
Grading, erosion control practices, sediment control practices and watercourse crossings shall be adequate to prevent transportation of sediment from the site to the satisfaction of the Department of Public Works.
Cut and fill slopes shall be no greater than 3:1, except as approved by the Department of Public Works to meet other community or environmental objectives.
Clearing and grading of natural resources, such as forests and wetlands, shall not be permitted, except when in compliance with all other Chapters of the Municipal Code of the City of Overland and State and Federal law.
Clearing techniques that retain existing vegetation to the maximum extent practicable shall be used and the time period for disturbed areas to be without vegetative cover shall be minimized to the extent practical to the satisfaction of the Department of Public Works.
Clearing, except that necessary to establish sediment control devices, shall not begin until all sediment control devices have been installed and have been stabilized.
Phasing shall be required on all sites disturbing greater than thirty (30) acres, with the size of each phase to be established at plan review and as approved by the Department of Public Works.
Erosion control requirements shall include the following:
Soil stabilization shall be completed within five (5) days of clearing or inactivity in construction.
If seeding or another vegetative erosion control method is used, it shall become established within two (2) weeks or the Department of Public Works may require the site to be reseeded or a non-vegetative option employed.
Techniques shall be employed to ensure stabilization on steep slopes and in drainage ways.
Soil stockpiles must be stabilized or covered at the end of each workday.
The entire site must be stabilized, using a heavy mulch layer or another method that does not require germination to control erosion, at the close of the construction season.
Techniques shall be employed to prevent the blowing of dust or sediment from the site.
Techniques shall be employed to divert upland runoff past disturbed slopes.
Sediment control requirements shall include:
Settling basins, sediment traps or tanks and perimeter controls.
Settling basins shall be provided for each drainage area with ten (10) or more acres disturbed at one time and shall be sized to contain one-half (0.5) inch of sediment from the drainage area and be able to contain a 2-year, 24-hour storm. If the provision of a basin of this size is impractical, other similarly effective BMPs, as evaluated and specified by the SWPPP, shall be provided.
Settling basins shall be designed in a manner that allows adaptation to provide long-term storm water management as required by the Department of Public Works.
Settling basins shall have stabilized spillways to minimize the potential for erosion of the spillway or basin embankment.
Protection for adjacent properties by the use of a vegetated buffer strip in combination with perimeter controls.
Watercourse protection requirements shall include:
Encroachment into or crossings of active watercourses/riparian areas and wetlands shall be avoided to the maximum extent practicable. Where applicable, all local, State and Federal permits and approvals shall be provided to the Department of Public Works prior to the issuance of a site disturbance permit.
Stabilization of any watercourse channels before, during and after any in-channel work.
If a defined watercourse is to be realigned or reconfigured, clearing and grubbing activities within fifty (50) feet of the watercourse shall not begin until all materials and equipment necessary to protect the watercourse and complete the work are on site. Once started, work shall be completed as soon as possible. Areas within fifty (50) feet of the watercourse shall be recontoured and revegetated, seeded or otherwise protected within five (5) working days after grading has ceased.
All storm water conveyances shall be designed according to the criteria of the Metropolitan St. Louis Sewer District (MSD) and the necessary MSD permits obtained.
Stabilization adequate to prevent erosion shall be provided at the outlets of all pipes and paved channels.
Construction site access requirements shall include:
A temporary access road provided at all sites including a wash-down area supporting all active sites; and
Other measures required by the Department of Public Works in order to ensure that sediment is not tracked onto public streets by construction vehicles or washed with wash effluent channeled directly into storm drains.
Control requirements for construction materials, construction wastes and other wastes generated on site shall include provisions, satisfactory to the Department of Public Works, for:
Spill prevention and control facilities for materials such as paint, solvents, petroleum products, chemicals, toxic or hazardous substances, substances regulated under the Resource Conservation and Recovery Act (RCRA) or the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) and any wastes generated from the use of such materials and substances, including their containers. Any containment systems employed to meet this requirement shall be constructed of materials compatible with the substances contained and shall be adequate to protect both surface and ground water.
Collection and disposal of discarded building materials and other construction site wastes, including those listed in Subsection (K)(1) above.
Control of concrete truck washouts.
Assurance that on-site fueling facilities will adhere to applicable Federal and State regulations concerning storage and dispensers.
Provision of sufficient temporary toilet facilities to serve the number of workers on site.
[Ord. No. 2008-30 §1, 7-14-2008]
The Department of Public Works shall make inspections as hereinafter required and either shall approve that portion of the work completed or shall notify the permittee wherein the work fails to comply with the grading, erosion and sediment control plan as approved. Plans for grading, stripping, excavating and filling work bearing the stamp of approval of the Department of Public Works shall be maintained at the site during the progress of the work. To obtain inspections, the permittee shall notify the Department of Public Works at least two (2) working days before the following:
The permittee or his/her agent shall make regular inspections of the land disturbance site, including all erosion and sediment and other pollutant control measures, outfalls and off-site receiving waters in accordance with the inspection schedule outlined in the approved SWPPP. Inspections must be scheduled at least once per week and no later than seventy-two (72) hours after heavy rain. The purpose of such inspections will be to ensure proper installation, operation and maintenance of BMPs and to determine the overall effectiveness of the SWPPP and the need for additional control measures. All inspections shall be documented in written form on weekly reports with copies submitted to the Department of Public Works at the time interval specified in the permit. The inspection reports are to include the following minimum information:
The Department of Pubic Works shall make inspections as deemed necessary to ensure the validity of the reports filed under Subsection (B) or to otherwise ensure proper installation, operation and maintenance of storm water BMPs and to determine the overall effectiveness of the SWPPP and the need for additional control measures.
[Ord. No. 2008-30 §1, 7-14-2008]
Stop Work Order — Revocation Of Permit. In the event that any person holding a site disturbance permit pursuant to this Chapter violates the terms of the permit or implements site development in such a manner as to materially adversely affect the health, welfare or safety of persons residing or working in the neighborhood or development site so as to be materially detrimental to the public welfare or injurious to property or improvements in the neighborhood, the Director of Public Works may suspend or revoke the site disturbance permit.
Violation And Penalties.
No person shall construct, enlarge, alter, repair or maintain any grading, excavation or fill or cause the same to be done contrary to or in violation of any terms of this Chapter.
Any person who knowingly makes a false statement in any application, record or plan required by this Chapter shall be deemed guilty of a misdemeanor and shall be punished as provided in Section 100.150 of this Code.
Any person violating any of the provisions of this Chapter shall be deemed guilty of a misdemeanor and each day during which any violation of any of the provisions of this Chapter is committed, continued or permitted shall constitute a separate offense. Upon conviction of any such violation, such person, partnership or corporation shall be punished for each separate offense as provided in Section 100.150 of this Code. In addition to any other penalty authorized by this Section, any person, partnership or corporation convicted of violating any of the provisions of this Chapter shall be required to bear the expense of remediation of any damage caused thereby and restoration of BMPs required for the site.
Project Closure Requirements. Any site development escrows or bonds will be not be fully released to the site operator or permittee until all of the following have been completed:
All temporary storm water control BMPs have been removed and the site has been fully stabilized;
All permanent storm water control BMPs have been completed; and
All final inspections/certifications have been completed by each of the government jurisdictions involved in authorizing the project.