HomeMy Public PortalAboutCity of Brentwood3/23/2021 City of Brentwood, MO Ecode360
City of Brentwood, MO
Tuesday, March 23, 2021
Chapter 400. Zoning
ARTICLE V. Supplemental Regulations
Division 7. Storm Water Management, Grading and Erosion
Control
Section 400.2660. Storm Water Pollution Prevention Plan
(SWPPP).
[R.O. 2009 §25-464; Ord. No. 3931 §3, 4-19-2004]
A. The design requirements in Sections 400.2670 and 400.2680 shall be taken into consideration
when developing the storm water pollution prevention plan and the plan shall include the following:
1. 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.
2. Site address or location description.
3. 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 Building Department may require.
4. 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.
5. 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.
6. Estimated grading quantity.
7. Details of the site drainage pattern both before and after major grading activities.
8. Construction access to site.
9. Description of BMPs to be utilized to control erosion and sedimentation during the period of
land disturbance.
10. 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,
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sanitary wastes and other pollutants from entering the natural drainage ways during the
period of construction and land disturbance.
11. 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.
12. Location of temporary off-street parking and wash -down area for related vehicles.
13. Sources of off -site borrow material or spoil sites and all information relative to haul routes,
trucks and equipment.
14. 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 dates 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.
15. All erosion and sediment control measures necessary to meet the objectives of this Division
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.
16. 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.
17. Provisions for maintenance of control facilities, including easements and estimates of the cost
of maintenance.
18. 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 Building Department.
19. 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.
B. The permittee shall amend the storm water pollution prevention plan whenever:
1. Design, operation or maintenance of BMPs is changed;
2. Design of the construction project is changed that could significantly affect the quality of the
storm water discharges;
3. Site operator's inspections indicate deficiencies in the SWPPP or any BMP;
4. Inspections by the Building Department, MSD or by the Missouri Department of Natural
Resources indicate deficiencies in the SWPPP or any BMP;
5. The SWPPP is determined to be ineffective in significantly minimizing or controlling erosion or
excessive sediment deposits in streams or lakes;
6. 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;
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7. Total settleable solids from a storm water outfall exceed 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;
8. Total settleable solids from a storm water outfall exceeds two and one-half (2.5) ml/L/hr for
any other outfall; or
9. MSD or the Missouri Department of Natural Resources determines whether violations of
water quality standards may occur or have occurred.
C. The permittee shall:
1. Notify all contractors and other entities (including utility crews, City employees or their agents)
that 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;
2. 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;
3. Provide copies of the SWPPP to all parties who are responsible for installation, operation or
maintenance of any BMP; and
4. Maintain a current copy of the SWPPP on the site at all times.
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