Permit Section Ohio EPA Permit Change or Addition Model Ordinance Section to be Changed Ordinance Controlling Construction Site Soil Erosion, Sediment, and Other Wastes and Storm Water Runoff Part III.G.2: Controls The SWP3 shall identify the subcontractors engaged in activities that could impact storm water runoff. The SWP3 shall contain signatures from all of the identified subcontractors indicating that they have been informed and understand their roles and responsibilities in complying with the SWP3. Construction Site Conservation Plan: Addition made to the end of paragraph 1 Part III.G.2.c: Velocity dissipation devices shall be placed at discharge locations and along the length of any outfall channel to provide non-erosive velocity from the structure to a watercourse so that the natural physical and biological characteristics and functions are maintained and protected. item 16: Addition made to the end of paragraph 1. The plan shall identify the subcontractors engaged in activities that could impact storm water runoff. The Construction Site Conservation Plan shall contain signatures from all of the identified subcontractors indicating that they have been informed and understand their roles and responsibilities in complying with the Construction Site Conservation Plan. Velocity dissipation devices shall be placed at discharge locations and along the length of any outfall channel to provide non-erosive velocity from the structure to a water course so that the natural physical and biological characteristics and functions are maintained and protected. 1
Permit Section Ohio EPA Permit Change or Addition Model Ordinance Section to be Changed Ordinance Controlling Construction Site Soil Erosion, Sediment, and Other Wastes and Storm Water Runoff Part III.G.2.d.ii: Sediment settling ponds. A sediment settling pond is required for any one of the following conditions: Concentrated storm water runoff (e.g., storm sewer or ditch); Runoff from drainage areas, which exceed the design capacity of silt fence or other sediment barriers, Runoff from drainage areas that exceed the design capacity of inlet protection; or Runoff from common drainage locations with 10 or more acres of disturbed land. item 9: Replace introductory paragraph and item 9.A.1. 9. Sediment Settling Ponds. A sediment settling pond is required for any one of the following conditions: Concentrated storm water runoff (e.g., storm sewer or ditch); Runoff from drainage areas, which exceed the design capacity of silt fence or other sediment barriers, Runoff from drainage areas that exceed the design capacity of inlet protection; or Runoff from common drainage locations with 10 or more acres of disturbed land. Part III.G.2.d.ii: The volume of the dewatering zone shall be a minimum of 1800 cubic feet per acre of drainage (67 cubic yards per acre) with a minimum 48-hour drain time for sediment basins serving a drainage area over 5 acres. item 9.B: Replace the first sentence of the item to incorporate Ohio EPA capacity changes. Alternative controls can be used if the owner can show, in writing, that the Ohio EPA approved the use of alternatives that the owner demonstrated to be equivalent in effectiveness to a sediment settling pond. 9. B: Each facility s storage capacity shall be no less than 1800 cubic feet of dewatering zone area per acre of total drainage area and 1000 cubic feet of sediment storage zone area per disturbed acre within the watershed of the basin. 2 The volume of the sediment storage zone shall be 1000 cubic feet per disturbed acre within the watershed of the basin. Change item 9.C to reflect a 48-hour draw down time. 9.C: 24 hours becomes 48 hours.
Permit Section Ohio EPA Permit Change or Addition Model Ordinance Section to be Changed Ordinance Controlling Construction Site Soil Erosion, Sediment, and Other Wastes and Storm Water Runoff Part III.G.2.d.ii: Ohio EPA requires a length to width ratio of 2:1 but now recommends that a ratio of 4:1 be achieved. ; a length to width ratio of 4:1 is recommended. item 9.D: Addition made to the end of the first sentence. Part III.G.2.d.iii: Part III.G.2.d.iv: Placing silt fence in a parallel series does not extend the size of the drainage area. All inlets receiving runoff from drainage areas of one or more acres will require a sediment settling pond. item 3: Addition made at the end of paragraph 1 immediately before Table 1. item 9.E: Clarifying addition made in the first sentence as indicated by the underlining. Minimum Standard, item 10 (Storm Sewer Inlet Protection): Inserted a new item B. (placing silt fence in a parallel series does not extend the size of the drainage area) The depth of the dewatering zone of the sediment settling pond must be less than or equal to five (5) feet. All inlets receiving runoff from drainage areas of one or more acres will require a sediment settling pond. 3
Permit Section Ohio EPA Permit Change or Addition Model Ordinance Section to be Changed Ordinance Controlling Construction Site Soil Erosion, Sediment, and Other Wastes and Storm Water Runoff Part III.G.2.i The inspection frequency may be reduced to at least once every month if the entire site is temporarily stabilized or runoff is unlikely due to weather conditions (e.g., the site is covered with snow, ice, or the ground is frozen.) A waiver of inspection requirements is available until one month before thawing conditions are expected to result in a discharge if all of the following conditions are met: the project is located in an area where frozen conditions are anticipated to continue for extended periods of time (i.e., more than one month); land disturbance activities have been suspended; and the beginning and ending dates of the waiver period are documented in the SWP3. Once a definable area has been fully stabilized, you may mark this on your SWP3 and no further inspection requirements apply to that portion of the site. Minimum Standard, item 20 (Inspections): Inserted a new item C. The inspection frequency may be reduced to at least once every month if the entire site is temporarily stabilized or runoff is unlikely due to weather conditions (e.g., the site is covered with snow, ice, or the ground is frozen.) A waiver of inspection requirements is available until one month before thawing conditions are expected to result in a discharge if all of the following conditions are met: the project is located in an area where frozen conditions are anticipated to continue for extended periods of time (i.e., more than one month); land disturbance activities have been suspended; and the beginning and ending dates of the waiver period are documented. Once a definable area has been fully stabilized, you may mark this on your plans and no further inspection requirements apply to that portion of the site. 4
Permit Section Ohio EPA Permit Change or Addition Model Ordinance Section to be Changed Ordinance Controlling Construction Site Soil Erosion, Sediment, and Other Wastes and Storm Water Runoff Part III.G.2.i Following each inspection, a checklist must be completed and signed by the qualified inspection personnel representative. At a minimum, the inspection report must include: I. The inspection date; II. Names, titles, and qualifications of personnel making the inspection; III. Weather information for the period since the last inspection IV. Weather information and a description of any discharges occurring at the time of the inspection; V. Location(s) of discharges of sediment or other pollutants from the site; VI. Location(s) of BMPs that need to be maintained; item 20 (Inspections): Replace items 20.C and 20.D of the original ordinance as shown (revised text is now part of item 20.D). D. Following each inspection, a checklist must be completed and signed by the qualified inspection personnel representative. At a minimum, the inspection report must include: I. The inspection date; II. Names, titles, and qualifications of personnel making the inspection; III. Weather information for the period since the last inspection IV. Weather information and a description of any discharges occurring at the time of the inspection; V. Location(s) of discharges of sediment or other pollutants from the site; VI. Location(s) of BMPs that need to be maintained; 5
Permit Section Ohio EPA Permit Change or Addition Model Ordinance Section to be Changed Ordinance Controlling Construction Site Soil Erosion, Sediment, and Other Wastes and Storm Water Runoff Part III.G.2.i (continued) Following each inspection, a checklist must be completed and signed by the qualified inspection personnel representative. At a minimum, the inspection report must include: (continued) VII. Location(s) of BMPs that failed to operate as designed or proved inadequate for a particular location; VIII. Location(s) where additional BMPs are needed that did not exist at the time of the inspection; IX. Corrective action required including any changes to the SWP3 necessary and implementation dates. item 20 (Inspections): Replace items 20.C and 20.D of the original ordinance as shown (revised text is now part of item 20.D) (continued). Following each inspection, a checklist must be completed and signed by the qualified inspection personnel representative. At a minimum, the inspection report must include: (continued) VII. Location(s) of BMPs that failed to operate as designed or proved inadequate for a particular location; VIII. Location(s) where additional BMPs are needed that did not exist at the time of the inspection; IX. Corrective action required including any changes to the Comprehensive Storm Water Management Plan necessary and implementation dates. Minimum Standard, item 20 (Inspections): Inserted a new item J. J. Sensitive areas including riparian and wetland setbacks shall be observed to ensure that they remain well marked and undisturbed. 6
Part VII Permit Section Ohio EPA Permit Change or Addition Model Ordinance Section to be Changed Ordinance Controlling Construction Site Soil Erosion, Sediment, and Other Wastes and Storm Water Runoff New definition added: New definition added as Qualified inspection personnel means a shown. person knowledgeable in the principles and practice of erosion and sediment controls, who possesses the skills to assess all conditions at the construction site that could impact storm water quality and to assess the effectiveness of any sediment and erosion control measures selected to control the quality of storm water discharges from the construction activity. QUALIFIED INSPECTION PERSONNEL: A person knowledgeable in the principles and practice of erosion and sediment controls, who possesses the skills to assess all conditions at the construction site that could impact storm water quality and to assess the effectiveness of any sediment and erosion control measures selected to control the quality of storm water discharges from the construction activity. 7
Permit Section Ohio EPA Permit Change or Model Ordinance Section Addition to be Changed Post-Construction Water Quality Runoff Ordinance Structural post-construction BMPs Post-Construction Water cannot be installed within a State Quality Control Plan: surface water (e.g., wetland or Add new item 6 as shown. stream) unless it s authorized by a Clean Water Act water quality certification and or 404 permit. Maintenance plans must ensure that pollutants collected within structural post-construction practices be disposed of in accordance with local, state, and federal regulations. To ensure that storm water management systems function as they were designed and constructed, the post-construction operation and maintenance plan must be a stand alone document, which contains: (1) a designated entity for storm water inspection and maintenance responsibilities; (2) the routine and non-routine maintenance tasks to be undertaken; (3) a schedule for inspection and maintenance; and (4) any necessary legally binding maintenance easements and agreements. Post-Construction Water Quality Control Plan: Modify items 8 and 10 and add new items 12 and 13 as shown. 6. Structural post-construction BMPs cannot be installed within a State surface water (e.g., wetland or stream) unless it is authorized by a Clean Water Act Section 401 water quality certification and/or Clean Water Act Section 404 Permit. 8. Long-term maintenance requirements and schedules of all BMPs for both the construction and Post-Construction phases of the development will be provided as a stand alone document to the Post- Construction operator and the Community. 10. This plan will identify the person or entity that will serve as the Post- Construction operator who will be financially responsible for maintaining the perpetual inspection and maintenance of permanent storm water conveyance and storage structures and other conservation practices. 12. Maintenance plans must ensure that pollutants collected within structural Post- Construction practices be disposed of in accordance with local, state, and federal regulations. 13. Maintenance plans must include legally binding perpetual maintenance easements and agreements. Easement documents must provide for community access. 8
Permit Section Ohio EPA Permit Change or Model Ordinance Section Addition to be Changed Post-Construction Water Quality Runoff Ordinance Construction activities, which do not Scope: add a new item 4 as include the installation of any shown. impervious surface (e.g., soccer fields), abandoned mine reclamation activities regulated by the Ohio Department of Natural Resources, stream and wetland restoration activities, and wetland mitigation activities are not required to comply with the conditions of Part III.G.2.e of this permit. Linear construction projects must be designed to minimize the number of stream crossings and the width of disturbance and achieve final stabilization of the disturbed area as defined in Part VII.H.1. Distinction between small (less than 5 acres) and large construction sites eliminated. Scope: modify item 4 of the original ordinance (now item 5) as shown. Post-Construction Water Quality Control Plan, item 14. 4. Construction activities, which do not include the installation of any impervious surface (e.g., soccer fields), abandoned mine reclamation activities regulated by the Ohio Department of Natural Resources, stream and wetland restoration activities, and wetland mitigation activities. However, linear construction projects must be designed to minimize the number of stream crossings and the width of disturbance and achieve final stabilization of the disturbed area as defined in the definitions section of this ordinance. No changes made. Part III.G.2.e.i: Through a site hydrologic study approved by the local municipal permitting authority that uses continuous hydrologic simulation and local long-term hourly precipitation records was eliminated. Post-Construction Water Quality Control Plan, item 14.B.3.a. is eliminated. Through a site hydrologic study approved by the local municipal permitting authority that uses continuous hydrologic simulation and local long-term hourly precipitation records is eliminated. 9
Permit Section Ohio EPA Permit Change or Addition Model Ordinance Section to be Changed Post-Construction Water Quality Runoff Ordinance The runoff coefficient C can be Post-Construction Water (3) Properly Sized BMPs: The BMP(s) determined from Table 1 or Quality Control Plan, item chosen must be sized to treat the water calculated through the use of the 14.B.3.b. is eliminated. Item quality volume (WQ v ) and ensure following equation: C= 0.858i 3-14.B.3 is changed as shown. compliance with Ohio s Water Quality 0.78i 2 + 0.774i = 0.04. Standards in OAC Chapter 3745-1. The WQ v shall be equivalent to the volume of runoff from a 0.75-inch rainfall and shall be determined according to the following equation: WQ v = C*P*A/12 where: WQ v = water quality volume in acre-feet C= runoff coefficient appropriate for storms less than 1 inch (either using Table 1 or the following formula: C=0.858i 3-0.78i 2 + 0.774i + 0.04 where i=fraction of post-construction impervious area) P=0.75 inch precipitation depth A= area draining into the BMP in acres. 10
Permit Section Ohio EPA Permit Change or Addition Model Ordinance Section to be Changed Post-Construction Water Quality Runoff Ordinance The BMPs listed in Table 2 below Post-Construction Water (6) The BMPs listed in Table 2 below shall shall be considered standard BMPs Quality Control Plan, item be considered standard BMPs approved approved for general use. However, 14.B.6 is replaced as shown. for general use. However, communities communities with a regulated MS4 with a regulated MS4 may limit the use of may limit the use of some of these some of these BMPs. BMPs shall be BMPs. BMPs shall be designed designed such that the drain time is long such that the drain time is long enough to provide treatment, but short enough to provide treatment, but enough to provide storage available for short enough to provide storage successive rainfall events and avoid the available for successive rainfall creation of nuisance conditions. The outlet events and avoid the creation of structure for the post-construction BMP nuisance conditions. The outlet must not discharge more than the first half structure for the post-construction of the WQv in less than one-third of the BMP must not discharge more than drain time. the first half of the WQv or EDv in less than one-third of the drain time. Table 2: Target Drain Times for Structural Post-Construction BMPs has been replaced by a new, expanded table. A municipally operated regional storm water BMP can be used as a post-construction BMP provided that the BMP can detain the WQv from the entire drainage area and release it over a 24 hour period. Post-Construction Water Quality Control Plan, Table 2 of item 14.B.6 is replaced with Ohio EPA s expanded table. Post-Construction Water Quality Control Plan, item 14.B.8: New sentence as shown is added to end of paragraph. New Table 2. A municipally operated regional storm water BMP can be used as a postconstruction BMP provided that the BMP can detain the WQv from the entire drainage area and release it over a 24 hour period upon written permission from the Community Engineer. 11
Permit Section Ohio EPA Permit Change or Model Ordinance Section Addition to be Changed Post-Construction Water Quality Runoff Ordinance Transportation Projects: The construction of new roads and item 1 modified with the roadway improvement projects by addition as shown. public entities (i.e., the state, counties, townships, cities, or villages) shall implement postconstruction BMPs in compliance with the current version (as of the effective date of this permit) of the Ohio Department of Transportation s Location and Design Manual, Volume Two Drainage Design that has been accepted by Ohio EPA. Redevelopment Projects: For development projects (i.e., developments on previously developed property), postconstruction practices shall either ensure a 20 percent net reduction of the site impervious area, provide for treatment of at least 20 percent of the WQv, or a combination of the two. Where projects are a combination of new development and redevelopment the total WQv that must be treated shall be calculated by a weighted average based on acreage, with the new development at 100 percent WQv and redevelopment at 20 percent WQv. Add new section as shown. The construction of new roads and roadway improvement projects by public shall implement post-construction BMPs in compliance with the current version (as of the effective date of this permit) of the Ohio Department of Transportation s Location and Design Manual, Volume Two Drainage Design that has been accepted by Ohio EPA. REDEVELOPMENT PROJECTS: For development projects (i.e., developments on previously developed property), postconstruction practices shall either ensure a 20 percent net reduction of the site impervious area, provide for treatment of at least 20 percent of the WQv, or a combination of the two. A one-for-one credit towards the 20 percent reduction of impervious area can be obtained through the use of pervious pavement and/or green roofs. Where projects are a combination of new development and redevelopment the total WQv that must be treated shall be calculated by a weighted average based on acreage, with the new development at 100 percent WQv and redevelopment at 20 percent WQv. 12
Permit Section Part III.G.4 Ohio EPA Permit Change or Addition Model Ordinance Section to be Changed Post-Construction Water Quality Runoff Ordinance The permittee may request approval Alternative Actions Section 1. Implementation of off-site storm water from Ohio EPA to use alternative modified to require prior management practices: The use of any methods to satisfy conditions in this approval from Ohio EPA of off-site Post-Construction BMPs permit if the permittee can alternative actions as requires written approval from Ohio demonstrate that the alternative shown. EPA and this approval must be methods are sufficient to protect the received prior to design approval overall integrity of the receiving and/or issuance of any building stream and the watershed. permits. Practical alternatives to be Alternative methods will be approved considered include: or denied on a case-by-case basis. A. Retrofitting of an existing storm water management practice. B. Watershed or stream restoration. C. Fees paid in an amount specified by the Community Engineer. The Community shall apply these fees to storm water management practices that improve the existing water quality. 2. Use of Alternative Post-Construction BMPs: Permitees must supply written approval from Ohio EPA to use Post- Construction BMPs that have been demonstrated to be equivalent to the effectiveness of those listed in Table 2 above. Approval from Ohio EPA must be received prior to design approval and/or issuance of any building permits. 13
Part VII Permit Section Ohio EPA Permit Change or Addition Model Ordinance Section to be Changed Post-Construction Water Quality Runoff Ordinance New definition added: New definition added as QUALIFIED INSPECTION PERSONNEL: Qualified inspection personnel shown. A person knowledgeable in the principles means a person knowledgeable in and practice of erosion and sediment the principles and practice of erosion controls, who possesses the skills to and sediment controls, who assess all conditions at the construction possesses the skills to assess all site that could impact storm water quality conditions at the construction site and to assess the effectiveness of any that could impact storm water quality sediment and erosion control measures and to assess the effectiveness of selected to control the quality of storm any sediment and erosion control water discharges from the construction measures selected to control the activity. quality of storm water discharges from the construction activity. 14