SECTION 109.0 STORM WATER POLLUTION PREVENTION PLAN (SWPPP)
109.1 Content — Storm Water Pollution
Prevention Plan (SWPPP): The design requirements in Chapter
2 of this Code shall be complied with 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 and parcel identification
number(s).
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 flood plains, locations of temporary
and permanent Best Management Practices (BMP) and such other information
as may be required by the County department(s) having enforcement
authority and responsibilities described in Section 103.0 of this
Code.
4) Existing contours of the site and adjoining strips of off-site
property and proposed contours after completion of the proposed land
disturbance 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) A natural resources map identifying soils, forest cover,
and resources protected under other provisions of County Ordinances.
6) 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.
7) Estimated quantity of land to be disturbed.
8) Details of the site drainage pattern both before and after
major land disturbance activities.
9) Access to construction site.
10) Description of Best Management Practices (BMP) to be utilized
to control erosion and sedimentation during the period of land disturbance.
11) Description of Best Management Practices (BMP) 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.
12) Description of Best Management Practices (BMP) that will
be installed during land disturbance to control pollutants in storm
water discharges that will occur after land disturbance activity has
been completed.
13) Location of temporary off-street parking, and wash-down
area for related vehicles.
14) Sources of off-site borrow material or spoil sites, and
all information relative to haul routes, trucks and equipment.
15) The anticipated sequence of construction and land disturbance
activities, including installation of Best Management Practices (BMP),
removal of temporary Best Management Practices (BMP), stripping and
clearing; rough grading; construction 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.
16) All erosion and sediment control measures necessary to meet
the objectives of this Code 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.
17) 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.
18) Provisions for maintenance of control facilities, including
easements and estimates of the cost of maintenance.
19) Plans for responding to any loss of contained sediment to
include the immediate actions the permit-holder will take in case
of a containment failure. This plan must include documentation of
actions and mandatory reporting to the Department of Public Works.
20) 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
Best Management Practices (BMP) are continually implemented and are
effective.
109.2 Required Plan Amendments — Storm
Water Pollution Prevention Plan (SWPPP): The permit-holder
shall amend the Storm Water Pollution Prevention Plan whenever:
1. Design, operation or maintenance of Best Management Practices
(BMP) 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 Storm Water Pollution Prevention Plan (SWPPP) or any Best Management
Practices (BMP);
4. Inspections by County or by the Missouri Department of Natural
resources indicate deficiencies in the Storm Water Pollution Prevention
Plan (SWPPP) or any Best Management Practices (BMP);
5. The Storm Water Pollution Prevention Plan (SWPPP) is determined
to be ineffective in significantly minimizing or controlling erosion
or excessive sediment deposits in streams or lakes;
6. The Storm Water Pollution Prevention Plan (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;
7. Total settleable solids from a storm water outfall exceeds
0.5 ml/L/hr if the discharge is within the prescribed proximity of
a "Valuable Resource Water" as defined by the Missouri Department
of Natural Resources;
8. Total settleable solids from a storm water outfall exceeds
2.5 ml/L/hr for any other outfall; or
9. The County or the Missouri Department of Natural Resources
determines violations of water Quality Standards may occur or have
occurred.
109.3 Permit-holder Responsibilities for Administration
of Storm Water Pollution Prevention Plan (SWPPP): The permit-holder
shall:
1. Notify all contractors and other entities (including utility
crews, County employees, or their agents) that will perform work at
the site, of the existence of the Storm Water Pollution Prevention
Plan (SWPPP) and what actions or precautions shall be taken while
on site to minimize the potential for erosion and the potential for
damaging any Best Management Practices (BMP);
2. Determine the need for and establish training programs to
ensure that all site workers have been trained, at a minimum, in erosion
control, material handling and storage, and housekeeping;
3. Provide copies of the Storm Water Pollution Prevention Plan
(SWPPP) to all parties who are responsible for installation, operation
or maintenance of any Best Management Practices (BMP); and
4. Maintain a current copy of the Storm Water Pollution Prevention
Plan (SWPPP) on the site at all times.