937.09 STORM WATER POLLUTION PREVENTION PLAN.
In order to control volume, quality, Sediment pollution of Water Resources and Wetlands, and minimize property damage, the applicant shall submit a SWP3 in accordance with the requirements of this regulation.
(a) Storm Water Pollution Prevention Plan (SWP3) required: The applicant shall develop a SWP3 describing how the quantity and quality of Storm Water will be managed after construction is complete for every discharge from the site and/or into a Water Resource. The Plan will illustrate the type, location, and dimensions of every non-structural and Structural Storm Water Management Practice incorporated into the site design, and the rationale for their selection. The rationale must address how these storm water management practices will address flooding within the site as well as flooding that may be caused by the development upstream and downstream of the site. The rationale will also describe how the storm water management practices minimize impacts to the physical, chemical, and biological characteristics of on-site and downstream Water Resources and, if necessary, correct current degradation of Water Resources that is occurring or take measures to prevent predictable degradation of Water Resources.
(b) Preparation by Professional Engineer: The SWP3 shall be prepared by a registered professional engineer that is a certified professional erosion and sediment control (CPESC) specialist, and include supporting calculations, plan sheets, and design details. The City of Findlay Engineer shall make the final determination of whether the practices proposed in the Comprehensive Storm Water Management Plan meet the requirements of this regulation. To the extent necessary, as determined by the City of Findlay Engineer, a site survey shall be performed by a Registered Professional Surveyor to establish boundary lines, measurements, or land surfaces.
(c) Guidance Documents: The ODNR Rainwater and Land Development Guide is to be used to provide assistance in choosing procedures for specific criteria and guidance to be followed when designing the Storm Water management system for the site. Structural and Non-structural methods, extended conveyance and extended detention are commonly used for water quality volume, sediment, and floatable material controls. These procedures may be updated from time to time, based on improvements in engineering, science, monitoring, and local maintenance experience.
(d) Contents: The Storm Water Pollution Prevention Plan (SWP3) shall contain an application, narrative report, construction site plan sheets, a long-term Inspection and Maintenance Agreement and a site description with the following information provided:
(1) Site description:
A. A description of the nature and type of the construction activity (e.g. residential, shopping mall, highway, etc.).
B. Total area of the site and the area of the site that is expected to be disturbed (i.e. grubbing, clearing, excavation, filling or grading, including off-site borrow areas).
C. A description of pre-development conditions at the site.
D. An estimate of the impervious cover and areas affected by the Soil Disturbing Activity at the beginning and conclusion of the project.
E. Existing data describing the soils throughout the site, including the soil series and association, Hydrologic Unit Code, hydrologic soil group, porosity, Infiltration characteristics, depth to groundwater, depth to bedrock, and any impermeable layers.
F. If available, information of any illicit discharge.
G. The location and name of the immediate Water Resource(s) that will receive discharge, and the first subsequent Water Resource(s).
H. Describe the Pre-Development condition of on-site or impacted Water Resources including the vertical stability of stream channels and indications of channel incision that may be responsible for current or future sources of high Sediment loading or loss of channel stability.
I. An implementation schedule which describes the sequence of major Soil Disturbing Activity (i.e., grubbing, excavating, grading, utilities and infrastructure installation) and the implementation of Erosion and Sediment controls to be employed during each operation. The activities shall fall into one of the following main categories:
1. Perimeter Control -All the controls necessary to keep Sediment on the property during initial site work. The measures shall be installed and inspected by CPSEC Certified Professional Engineer before site work can begin.
2. Site Control - All other temporary measures required to be in place during all phases of construction.
3. Permanent Control - Those measures intended to provide post-construction Erosion and Sediment controls.
4. Maintenance - List the maintenance steps or best management practices required for the permanent controls.
Each of these steps shall be certified as complete by a CPESC Certified Professional Engineer.
If possible, the entire site be shown on one plan sheet to allow for a complete view of the site during plan review. If a smaller scale is used to accomplish this, separate sheets providing an enlarged view of areas on individual sheets shall be provided.
(2) Site Plan showing:
A. Limits of Soil Disturbing Activity on the site.
B. Soils types for the entire site, including locations of unstable or highly erodible soils.
C. Existing and proposed one-foot (1') contours. This must include a delineation of Drainage Watersheds expected before, during, and after major Grading activities as well as the size of each Drainage Watershed in acres.
D. Water Resource locations including springs, Wetlands, streams, lakes, water wells, flood hazard zone(s), and associated setbacks on or within 200 feet of the site, including the boundaries of Wetlands or streams and first subsequent named receiving water(s) the applicant intends to fill or relocate for which the applicant is seeking approval from the Army Corps of Engineers, FEMA, and/or Ohio EPA.
E. Pre-development and post-development locations of buildings, roads, parking facilities, and utilities.
F. The location of any in-stream activities including stream crossings.
G. The locations of all Erosion And Sediment Controls for each contributing Drainage Watershed area.
H. Areas designated for the storage or disposal of solid, hazardous or toxic wastes, including dumpster areas, areas designated for truck washout and vehicle fueling.
I. The location of designated Construction Entrances.
J. The location of each construction and Post-development Structural Storm Water Management Practice, and identification of the Drainage area served by each storm water management practice.
K. Ultimate outfall labeled with latitude and longitude and Ohio North State Plain Coordinates.
(3) Contact information: Company name and contact information as well as contact name, addresses, and phone numbers for the following:
A. The Professional Engineer who prepared the SWP3.
B. The Site Owner.
(4) Phase, if applicable, of the overall development plan.
(5) Sublot numbers if project is a subdivision.
(6) Ohio EPA NPDES Permit Number and other applicable state and federal permit numbers, if available, or status of various permitting requirements if final approvals have not been received.
(7) Location, including complete site address and sublot number if applicable.
(8) Location of any easements or other restrictions placed on the use or maintenance of the property. Include volume and page for recorded document.
(e) An Inspection and Maintenance Agreement. An Inspection and Maintenance Agreement shall be required for Post-construction Structural Storm Water Management Practices and shall contain the following information and provisions for recording with the County Recorder on applicable subdivision plats or lot splits by deed:
(1) A schedule for regular maintenance for each aspect of the Structural Storm Water Management Practice and description of routine and non-routine maintenance tasks to ensure continued performance as detailed in the approved SWP3. This schedule may include additional standards, as required by the City of Findlay Engineer, to ensure continued performance of the Structural Storm Water Management Practices.
(2) The location and documentation of all access and maintenance easements on the property.
(3) Identification of the Site Owner(s), or organization, responsible for long-term maintenance, including repairs, of the Structural Storm Water Management Practices.
(4) Agreement by the Site Owner(s), or organization, to maintain Structural Storm Water Management Practices in accordance with this regulation.
(5) Permission for the City of Findlay's Authorized Agent to enter upon the property to conduct inspections as necessary to verify that the Structural Storm Water Management Practices are being maintained and operated in accordance with this agreement/regulation.
(6) Agreement by the Site Owner(s) to: maintain records of the results of site inspections; identify any corrective actions required to bring the Structural Storm Water Management Practices into compliance; and make such information and records available to the City upon the request of the City.
(7) If the City of Findlay notifies the Site Owners responsible for maintenance of the maintenance problems that require correction, the specific corrective actions shall be taken within a reasonable time frame as determined by the City of Findlay.
(8) The City of Findlay is authorized to enter upon the property and to perform the corrective actions identified in the inspection report if the Site Owner responsible for maintenance does not make the required corrections in the specified time period. The City of Findlay shall be reimbursed by the Site Owner responsible for maintenance for all expenses incurred within 10 days of receipt of invoice from the City of Findlay or the City may assess the cost thereof against the lots or lands abutting thereon.
(9) The method of funding long-term maintenance and inspections of all Structural Storm Water Management Practices.
(10) A waiver of liability and a release excepting the City of Findlay from all damages, accidents, casualties, occurrences, or claims that might arise or be asserted against the City of Findlay from the construction, presence, existence, or maintenance of the Structural Storm Water Management Practices.
The applicant must provide an Inspection and Maintenance Agreement as part of the Storm Water Pollution and Prevention Plan Submittal. A recorded copy of the Agreement must be submitted before bonding for erosion control is released by the City.
(f) A soils engineering report. The City of Findlay Engineer may require the SWP3 to include a Soils Engineering Report based upon his/her determination that the conditions of the soils are unknown or unclear to the extent that additional information is required to protect against erosion or other hazards. This report shall be based on adequate and necessary test borings, and shall contain all the information listed below. Recommendations included in the report may be incorporated in the grading plans and/or other specifications for site development.
(1) Data regarding the nature, distribution, strength, and erodibility of existing soils.
(2) If applicable, data regarding the nature, distribution, strength, and erodibility of the soil to be placed on the site.
(3) Conclusions and recommendations for grading procedures.
(4) Conclusions and recommended designs for interim soil stabilization devices and measures, and for permanent soil stabilization after construction is completed.
(5) Design criteria for corrective measures when necessary.
(6) Opinions and recommendations covering the stability of the site.
(Ord. 2015-038. Passed 5-19-15.)