Okaloosa County BOCC — May 6, 2014 — FORM_62-346_900-11ERP applicationLongwood Park — reading text

for the system, including all on-site and off-site areas to be reserved for water management purposes, and rights-of-way and easements for the existing drainage system, if any. O. Receiving waters or surface water management systems into which runoff from the developed site will be discharged. P. Location and details of the erosion, sediment and turbidity control measures to be implemented during each phase of construction and all permanent control measures to be implemented in post-development conditions. (Note: A copy of the Stormwater Pollution Prevention Plan (SWPPP) required under the National Pollutant Discharge Elimination System [NPDES] program is acceptable, but is not required for this item—see Chapter 11 of Applicant’s Handbook Volume I). Q. Location, grading, design water levels, and planting details of all mitigation areas; R. Site grading details, including perimeter site grading. S. Disposal site for any excavated material, including temporary and permanent disposal sites. T. Dewatering plan details. U. Location and description of any nearby existing offsite features which might be affected by the proposed construction or development or may affect the proposed construction or development such as wells (including private, public, irrigation, and agricultural), stormwater management ponds, buildings or other structures, spray fields, land fills, and wetlands or other surface waters. V. For phased projects, provide a master development plan. W. For marina facilities, locations of any sewage pumpout facilities, fueling facilities, boat repair and maintenance facilities, and fish cleaning stations. Be advised that an additional permit for the facility’s construction and operation may be required from the NWFWMD under Chapter 40A-4, F.A.C. (March 2, 2000), if the project utilizes a dam or barrier that is over 10 ft. tall or the facility is capable of impounding 50-ac. ft. or more. IV. Construction Schedule and Techniques Construction schedule and description of construction techniques, sequencing and equipment. This information should specifically include the following: A. Schedule of implementation of temporary and permanent erosion, sediment, and turbidity control measures. B. Construction sequencing, including the utilization of best management practices. C. Erosion Control and Stabilization Plan, or a Stormwater Pollution Prevention Plan (if applicable). Form #62-346.900(1) – Joint Application for ERP/SSL Authorization/Federal D&F Permit in Northwest Florida, Section D, Page 3 of 11  D. For projects that involve dredging or excavation in wetlands or other surface waters, describe the method of excavation, and the type of material to be excavated. E. For projects that involve fill in wetlands or other surface waters, describe the source and type of fill material to be used. For shoreline stabilization projects that involve the installation of riprap, state how these materials are to be placed, (i.e., individually or with heavy equipment) and whether the rocks will be underlain with filter cloth. F. Method for installing any pilings or seawall slabs. G. Methods for transporting equipment and materials to and from the work site. If barges are required for access, provide the low water depths and draft of the fully loaded barge. H. If dewatering is required, detail the dewatering proposal including the methods that are proposed to contain the discharge, methods of isolating dewatering areas, and indicate the period dewatering structures will be in place (Note: a consumptive use or water use permit may be by required from the NWFWMD as well as an industrial waste permit from the Department). I. Plans for avoiding wetlands and other surface waters when transporting equipment and materials to and from the work site prior to, during, and after construction. J. A demolition plan for any existing structures to be removed (Note: an asbestos removal permit may be required by the Department). K. The schedule and party responsible for monitoring, submitting notice of construction commencement, and submitting as- built certifications for the project when completed. V. Drainage Information A. Pre-development and post-development drainage calculations, signed and sealed by an registered professional, including the following: 1. Runoff characteristics, including area, runoff curve number or runoff coefficient, NRCS hydrologic soils group, and time of concentration for each drainage basin. 2. Water table elevations (normal and seasonal high) including aerial extent and magnitude of any proposed water table draw down. 3. Receiving water elevations (normal, wet season, design storm including any backwater effects). 4. Design storms used including rainfall depth, duration, frequency, and distribution. 5. Runoff hydrograph(s) for each drainage basin, for all required design storm event(s). 6. Stage-storage computations for any area such as a reservoir, closed basin, detention area, or channel, used in storage routing. 7. Stage-discharge computations for any storage areas at a selected control point, such as control structure or natural restriction. 8. Flood routings through on-site conveyance and storage areas. 9. Water surface profiles in the primary drainage system for each required design storm event. 10. Runoff peak rates and volumes discharged from the system for each required design storm event. Form #62-346.900(1) – Joint Application for ERP/SSL Authorization/Federal D&F Permit in Northwest Florida, Section D, Page 4 of 11  11. Tail water history and justification (time and elevation). 12. Pump specifications and operating curves for range of possible operating conditions (if used in system) as well as redundancy systems and emergency power loss contingency plans. B. The results of any percolation tests, where appropriate, and soil borings that are representative of the actual site conditions and the specific techniques used. C. The acreage and percentages of the total project area, of the following: 1. Impervious surfaces, excluding wetlands and other surface water. 2. Pervious surfaces (natural and vegetated areas, not including wetlands). 3. Lakes, canals, retention areas, other open water areas — identify all of these, and also indicate those that are isolated (not connected to other wetlands or other surface waters). 4. Wetlands — identify all of these, and also indicate those that are isolated (not connected to other wetlands or other surface waters). D. An engineering analysis of floodplain storage and conveyance (if applicable), including: 1. Location and volume of encroachment within regulated floodplains. 2. Plan for compensating floodplain storage, if necessary, and calculations required for determining minimum building and road flood elevations. E. An analysis of the water quality treatment system, including: 1. A description of the proposed stormwater treatment methodology that addresses the type of treatment, pollution abatement volumes, and recovery analysis. 2. Construction plans and calculations that address stage-storage and design elevations, which demonstrate compliance with the appropriate water quality treatment criteria. F. Volumetric and mounding analysis for the proposed systems. G. A description of the methodology, assumptions and references for the parameters listed above, and a copy of all such computations, engineering plans, and specifications used to analyze the system. If a computer program is used for the analysis, provide the name of the program, a description of the program, input and output data, a portable media or electronic copy, if available, and justification for model selection. VI. Operation and Maintenance and Legal Documentation A. Describe the overall maintenance and operation schedule for the proposed system. A. Identify the entity that will be responsible for operating and maintaining the system in perpetuity if different than the permittee, a draft document enumerating the enforceable affirmative obligations on the entity to properly operate and maintain the system in perpetuity, and documentation of the entity's financial responsibility for long-term maintenance. If the proposed operation and maintenance entity is not a property owner's association, provide proof of the existence of an entity, or the future acceptance of the system by an entity that will operate and maintain the system. If a property owner's association is the proposed operation and maintenance entity, provide copies of the articles of incorporation for the association and copies of the declaration, restrictive covenants, deed restrictions, or other operational documents that assign responsibility for the operation and maintenance of the system. Provide information ensuring the continued Form #62-346.900(1) – Joint Application for ERP/SSL Authorization/Federal D&F Permit in Northwest Florida, Section D, Page 5 of 11  adequate access to the system for maintenance purposes. Before transfer of the system to the operating entity will be approved, the permittee must document that the transferee will be bound by all terms and conditions of the permit. B. Copies of all proposed conservation easements, storm water management system easements, property owner's association documents, and plats for the property containing the proposed system. VII. Water Use If the stormwater management system will be used for water supply, including landscape irrigation, provide the reuse plans as set forth in sSection 12 of Applicant’s Handbook Volume II. Be advised that if you are proposing any consumptive uses of water, you may need applicable permits under Chapter 40A-2, F.A.C. (March 27,