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For purpose of this regulation, the following terms shall have the meaning herein indicated:
(a) “Abbreviated Stormwater Pollution Prevention Plan (Abbreviated SWP3).” The written document that sets forth the plans and practices to be used to meet the requirements of this regulation.
(b) “Acre.” A measurement of area equaling 43,560 square feet.
(c) “Administrator.” The person or entity having the responsibility and duty of administering and ensuring compliance with this regulation.
(d) “City Engineer.” The City Engineer shall mean the City's Engineer, its consulting engineer or engineering firm, any engineer or engineering firm hired by the City to perform work for the City on any given project or any designee of one of the above, e.g., a City Building Inspector designated to perform stormwater inspections.
(e) “Commencement of construction.” The initial disturbance of soils associated with clearing, grubbing, grading, placement of fill, or excavating activities or other construction activities.
(f) “Concentrated stormwater runoff.” Any stormwater runoff that flows through a drainage pipe, ditch, diversion, or other discrete conveyance channel.
(g) “Construction entrance.” The permitted points of ingress and egress to development areas regulated under this regulation.
(h) “Development area.” A parcel or contiguous parcels owned by one person or persons, or operated as one development unit, and used or being developed for commercial, industrial, residential, institutional, or other construction or alteration that changes runoff characteristics.
(i) “Dewatering volume.” See current Ohio Rainwater and Land Development Manual.
(j) “Discharge.” The addition of any pollutant to surface waters of the State from a point source.
(k) “Disturbance.” Any clearing, grading, excavating, filling, or other alteration of land surface where natural or man-made cover is destroyed in a manner that exposes the underlying soils.
(l) “Disturbed area.” An area of land subject to erosion due to the removal of vegetative cover and/or soil disturbing activities such as grading, excavating, or filling.
(m) “Drainage.”
(1) The area of land contributing surface water to a specific point.
(2) The removal of excess surface water or groundwater from land by surface or subsurface drains.
(n) “Drainage watershed.” For the purpose of this regulation the total contributing drainage area to a SCM i.e., the "watershed" directed to the practice. This includes offsite contributing drainage.
(o) “Drainage way.” A natural or manmade channel, ditch, or waterway that conveys surface water in a concentrated manner by gravity.
(p) “Erosion.” The process by which the land surface is worn away by the action of wind, water, ice, gravity, or any combination of those forces.
(q) “Erosion and sediment control.” The control of soil, both mineral and organic, to minimize the removal of soil from the land surface and to prevent its transport from a disturbed area by means of wind, water, ice, gravity, or any combination of those forces.
(r) “Final stabilization.” All soil disturbing activities at the site have been completed and a uniform perennial vegetative cover with a density of at least eighty percent coverage for the area has been established or equivalent stabilization measures, such as the use of mulches or geotextiles, have been employed. In addition, all temporary erosion and sediment control practices are removed and disposed of and all trapped sediment is permanently stabilized to prevent further erosion. Final stabilization also requires the installation of permanent (post-construction) SCMs where applicable.
(s) “Grading.” The excavating, filling, or stockpiling of earth material, or any combination thereof, including the land in its excavated or filled condition.
(t) “Grubbing.” Removing or grinding of roots, stumps and other unwanted material below existing grade.
(u) “Impervious.” That which does not allow infiltration.
(v) “Landscape architect.” A professional landscape architect registered in the State of Ohio.
(w) “Larger common plan of development or sale.” A contiguous area where multiple separate and distinct construction activities may be taking place at different times on different schedules under one plan.
(x) “Maximum extent practicable (MEP).” The technology-based discharge standard for Municipal Separate Storm Sewer Systems to reduce pollutants in stormwater discharges that was established by the Clean Water Act § 402(p). A discussion of MEP as it applies to small MS4s is found in 40 CFR 122.34.
(y) “Municipal Separate Storm Sewer System (MS4).” A conveyance or system of conveyances (including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, or storm drains) that are:
(1) Owned or operated by the Federal government, State, municipality, township, county, district, or other public body (created by or pursuant to State or Federal law) including a special district under State law such as a sewer district, flood control district or drainage districts, or similar entity, or a designated and approved management agency under Section 208 of the Federal Water Pollution Control Act that discharges into surface waters of the State;
(2) Designed or used for collecting or conveying solely stormwater;
(3) Which is not a combined sewer; and
(4) Which is not a part of a publicly owned treatment works.
(z) “National Pollutant Discharge Elimination System (NPDES).” The National program for issuing, modifying, revoking and reissuing, termination, monitoring and enforcing permits and enforcing pretreatment requirements, under sections 307, 402, 318, 405 under the Clean Water Act.
(aa) “Owner or operator.” Any party associated with a construction project that meets either of the following two criteria:
(1) The party has operational control over construction plans and specifications, including the ability to make modifications to those plans and specifications; or
(2) The party has day-to-day operational control of those activities at a project which are necessary to ensure compliance with a Stormwater Pollution Prevention Plan (SWP3) for the site or other permit conditions (e.g. they are authorized to direct workers at a site to carry out activities required by the SWP3 or comply with other permit conditions.)
(bb) “Ordinary high water mark.” Means that line on the shore established by the fluctuations of water and indicated by physical characteristics such as clear, natural line impressed on the bank, shelving, changes in the character of soil, destruction of terrestrial vegetation, the presence of litter and debris, or other appropriate means that consider the characteristics of the surrounding areas.
(cc) “Owner or operator.” The owner or operator of any “facility or activity” subject to regulation under the NPDES program.
(dd) “Parcel.” Means a tract of land occupied or intended to be occupied by a use, building or group of buildings and their accessory uses and buildings as a unit, together with such open spaces and driveways as are provided and required. A parcel may contain more than one contiguous lot individually identified by a 'Permanent Parcel Number' assigned by the Lorain County Auditor's Office.
(ee) “Percent imperviousness.” The impervious area created divided by the total area of the project site.
(ff) “Permanent stabilization.” Establishment of permanent vegetation, decorative landscape mulching, matting, sod, rip rap, and landscaping techniques to provide permanent erosion control on areas where construction operations are complete or where no further disturbance is expected for at least one year.
(gg) “Person.” Any individual, corporation, firm, trust, commission, board, public or private partnership, joint venture, agency, unincorporated association, municipal corporation, county or state agency, the Federal government, other legal entity, or an agent thereof.
(hh) “Phasing.” Clearing a parcel of land in distinct sections, with the stabilization of each section before the clearing of the next.
(ii) “Point source.” Any discernible, confined and discrete conveyance, including but not limited to, any pipe, ditch, channel, tunnel, conduit, well, discrete fissure, container, rolling stock, concentrated animal feeding operation, landfill leach ate collection system, vessel or the floating craft from which pollutants are or may be discharged. This term does not include return flows from irrigated agriculture or agricultural stormwater runoff.
(jj) “Pre-construction meeting.” A meeting between the City Engineer and all principle parties, prior to the start of any construction, at a site that requires a Stormwater Pollution Prevention Plan.
(kk) “Pre-winter stabilization meeting.” A meeting between the City Engineer and all principal parties, prior to October 1, in order to plan winter erosion and sediment controls for a site that requires a Stormwater Pollution Prevention Plan.
(ll) “Professional engineer.” A professional engineer registered in the State of Ohio.
(mm) “Qualified inspection personnel.” A person knowledgeable in the principles and practice of erosion and sediment controls, who possess the skills to assess all conditions at the construction site that could impact stormwater quality and to assess the effectiveness of any sediment and erosion control measure selected to control the quality of stormwater discharges from the construction activity.
(nn) “Rainwater and Land Development.” Ohio's standards for stormwater management, land development, and urban stream protection. The most current edition of these standards shall be used with this regulation.
(oo) “Riparian area.” The transition area between flowing water and terrestrial (land) ecosystems composed of trees, shrubs and surrounding vegetation which serve to stabilize erodible soil, improve both surface and ground water quality, increase stream shading and enhance wildlife habitat.
(pp) “Runoff.” The portion of rainfall, melted snow, or irrigation water that flows across the ground surface and is eventually conveyed to water resources or wetlands.
(qq) “Runoff coefficient.” The fraction of rainfall that will appear at the conveyance as runoff.
(rr) “Sediment.” The soils or other surface materials that are transported or deposited by the action of wind, water, ice, gravity, or any combination of those forces, as a product of erosion.
(ss) “Sediment settling pond.” A sediment trap, sediment basin or permanent basin that has been temporarily modified for sediment control, as described in the latest edition of Rainwater and Land Development.
(tt) “Sediment storage volume.” See current edition of Rainwater and Land Development.
(uu) “Sedimentation.” The deposition or settling of sediment.
(vv) “Setback.” A designated transition area around water resources that is left in a natural, usually vegetated, state so as to protect the water resources from runoff pollution. Soil disturbing activities in this area are restricted by this regulation.
(ww) “Soil disturbing activity.” Clearing, grading, excavating, filling, grubbing or stump removal that occurs during clearing or timber activities or other alteration of the earth's surface where natural or human made ground cover is destroyed and that may result in, or contribute to, erosion and sediment pollution.
(xx) “Soil & Water Conservation District (SWCD).” An entity organized under Ohio R.C. Chapter 1515 referring to either the Soil and Water Conservation District Board or its designated employee(s). Hereafter referred to as Lorain SWCD.
(yy) “Stabilization.” The use of SCMs such as seeding and mulching, that reduce or prevent soil erosion by water, wind, ice, gravity, or a combination of those forces.
(zz) “Steep slopes.” Slopes that are fifteen percent or greater in grade. NOTE: If otherwise defined in City zoning, use City definition.
(aaa) “Stormwater control measure (SCM).” Schedule of activities, prohibitions of practices, maintenance procedures, and other management practices (both structural and non-structural) to prevent or reduce the pollution of water resources SCMs also include treatment requirements, operating procedures, and practices to control facility and/or construction site runoff, spillage, or leaks; sludge or waste disposal; or drainage from raw material storage.
(bbb) “Stormwater Pollution Prevention Plan (SWP3).” The written document that sets forth the plans and practices to be used to meet the requirements of this regulation.
(ccc) “Stormwater.” Stormwater runoff, snow melt and surface runoff and drainage.
(ddd) “Subdivisions, major and minor.” See Ohio Administrative Code 711.001 for definition.
(eee) “Surface outlet.” A dewatering device that only draws water from the surface of the water.
(fff) “Surface waters of the State (also water resource).” Any streams, lakes, reservoirs, ponds, marshes, wetlands, or other waterways situated wholly or partly within the boundaries of the State, except those private waters which do not combine or affect a junction with surface water. Waters defined as sewerage systems, treatment works or disposal systems in Ohio R.C. 6111.01 are not included.
(ggg) “Temporary stabilization.” The establishment of temporary vegetation, mulching, geotextiles, sod, preservation of existing vegetation, and other techniques capable of quickly establishing cover over disturbed areas to provide erosion control between construction operations.
(hhh) “Topsoil.” The upper layer of the soil that is usually darker in color and richer in organic matter and nutrients than subsoil.
(iii) “Total maximum daily load (TMDL).” The sum of the existing and/or projected point source, nonpoint source, and background loads for a pollutant to a specified watershed, water resource or wetland, or water resource or wetland segment. A TMDL sets and allocates the maximum amount of a pollutant that may be introduced into the water and still ensure attainment and maintenance of water quality standard.
(jjj) “Unstable soils.” A portion of land that is identified by the City Engineer as prone to slipping, sloughing, or landslides, or is identified by the U.S. Department of Agriculture Natural Resource Conservation Service methodology as having a low soil strength.
(kkk) “Water quality volume (WQv).” The volume of stormwater runoff which must be captured and treated prior to discharge from the developed site after construction is complete. WQv is based on the expected runoff generated by the mean storm precipitation volume from post-construction site conditions at which rapidly diminishing returns in the number of runoff events captured begins to occur.
(lll) “Water resource (see “Surface waters of the State”).” Any stream, lake, reservoir, pond, marsh, wetland, or waterway situated wholly or partly within the boundaries of the State, except those private waters which do not combine or affect a junction with surface water. Waters defined as sewerage systems, treatment works or disposal systems in Ohio R.C. 6111.01 are not included.
(mmm) “Watershed.” The total drainage area contributing runoff to a single point.
(nnn) “Wetland.” Those areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions, including swamps, marshes, bogs, and similar areas (40 CFR 232, as amended).
(Ord. 134-16. Passed 12-27-16.)
(a) Compliance with the provisions of this regulation shall not relieve any person from responsibility for damage to any person otherwise imposed by law. The provisions of this regulation are promulgated to promote the health, safety, and welfare of the public and are not designed for the benefit of any individual or any particular parcel of property.
(b) By approving an SWP3 under this regulation, the City does not accept responsibility for the design, installation, and operation and maintenance of stormwater management practices.
(c) Performance Liability. No provision of this chapter shall limit, increase or otherwise affect the liabilities of the owner nor impose any liability upon the City not otherwise imposed by law.
(d) No Release from Other Requirements. No condition of this permit shall release the owner from any responsibility or requirements under other Federal, State, or local environmental chapters. If requirements vary, the most restrictive requirements shall prevail.
(e) Proceeding with Activity. Soil-disturbing activities regulated under this chapter shall not begin until all necessary State and Federal permits and appropriate approvals of the SWP3 have been granted to the site owner.
(f) Performance Responsibility. The owner is responsible for carrying out all provisions of the approved SWP3 and for meeting all the standards and requirements of this chapter.
(Ord. 134-16. Passed 12-27-16.)
(a) Where this regulation is in conflict with other provisions of law or ordinance, the Planning and Zoning Committee shall decide the best course for the City.
(b) If any clause, section, or provision of this regulation is declared invalid or unconstitutional by a court of competent jurisdiction, the validity of the remainder shall not be affected thereby.
(c) This regulation shall not be construed as authorizing any person to maintain a private or public nuisance on their property, and compliance with the provisions of this regulation shall not be a defense in any action to abate such a nuisance.
(d) Failure of the City to observe or recognize hazardous or unsightly conditions or to recommend corrective measures shall not relieve the site owner from the responsibility for the condition or damage resulting therefrom, and shall not result in the City, its officers, employees, or agents being responsible for any condition or damage resulting there from.
(Ord. 134-16. Passed 12-27-16.)
(a) This regulation requires that a Stormwater Pollution Prevention Plan (SWP3) be developed and implemented for all commercial and industrial site development and all development projects disturbing one acre or more and on which any regulated activity of Section 1052.01(c) is proposed. The City Engineer has the discretion to require a SWP3 for projects on sites of any size.
(b) The following activities shall submit an abbreviated SWP3:
(1) New single-family residential construction not part of an approved subdivision. If such activities disturb one acre or more, or are part of a larger common plan of development or sale disturbing one acre or more, an Ohio EPA Construction Site General Permit and a full SWP3 is required.
(2) Additions or accessory buildings for single-family residential construction. If such activities disturb one acre or more, or are part of a larger common plan of development or sale disturbing one acre or more, an Ohio EPA Construction Site General Permit and a full SWP3 is required.
(3) All non-residential construction on parcels of less than one acre.
(4) General clearing activities not related to construction. If such activities disturb one acre or more, or are part of a larger common plan of development or sale disturbing one acre or more, an Ohio EPA Construction Site General Permit and a full SWP3 is required.
(c) Activities disturbing one tenth or less of an acre are not required to submit an SWP3 or an abbreviated SWP3, unless required by the City Engineer. These activities must comply with all other provisions of this regulation.
(Ord. 134-16. Passed 12-27-16.)
(a) Pre-Application Meeting. The owner is encouraged to schedule a meeting with the City Engineer or his or her designated representative to:
(1) Discuss the proposed project;
(2) Review the requirements of this chapter;
(3) Identify unique aspects of the project that must be addressed during the review process;
(4) Establish a preliminary review and approval schedule.
(5) It is encouraged that this meeting occurs with the Planning Commission pre-application meeting as listed in Section 1244.06.
(b) Stormwater Pollution Prevention Plan (SWP3). The owner shall submit two sets of an SWP3 and the applicable fees as set forth in Section 1052.11
to the City Planning Office in conjunction with the submittal of the final plat (see Section 1244.10
for final plat submission requirements). This plan shall meet the requirements of Section 1052.08
and Section 1052.09
, and show the property boundaries (proposed if necessary), setbacks, dedicated open space, public roads, water resources, stormwater control facilities, and blocks in sufficient detail and engineering analysis to allow the City Engineer to determine if the site is laid out in a manner that meets the intent of this chapter and if the proposed stormwater management practices are capable of controlling runoff from the site in compliance with this chapter. This plan shall be approved by the City Engineer prior to issuance of any building permits.
(c) Abbreviated SWP3. The owner shall submit two sets of the abbreviated SWP3 and the applicable fees to the City as follows:
(1) For single-family home construction. Before issuance of a building permit by the Chief Building Inspector.
(2) For other construction projects. Before issuance of a building permit by the Chief Building Inspector.
(3) For general clearing projects. Prior to issuance of a clearing permit by the Chief Building Inspector.
(d) Review and Comment. The City Engineer shall review the plans submitted, and shall approve or return for revisions with comments and recommendations for revisions. A plan rejected because of deficiencies shall receive a narrative report stating specific problems and the procedures for filing a revised plan.
(e) Approval Necessary. Land-clearing and soil-disturbing activities shall not begin, and building permits shall not be issued without an approved SWP3 and deposits necessary as set forth in Section 1052.11 except as approved by the City Engineer.
(f) The developer, engineer and contractor, and other principal parties, shall meet with the City Engineer for a pre-construction meeting no less than seven days prior to soil disturbing activity at the site to ensure that erosion and sediment control devices are properly installed, limits of disturbance and buffer areas are properly delineated and construction personnel are aware of such devices and areas. Pre-construction meetings for abbreviated SWP3s may be waived at the discretion of the City Engineer.
(g) Valid for Two Years. Approvals issued in accordance with this chapter shall remain valid for two years from the date of approval.
(Ord. 134-16. Passed 12-27-16.)
Approvals issued in accordance with this regulation do not relieve the owner of responsibility for obtaining all other necessary permits and/or approvals from the Ohio EPA, the U.S. Army Corps of Engineers, and other Federal, State, and/or county agencies. If requirements vary, the most restrictive requirement shall prevail. These permits may include, but are not limited to, those listed below. All submittals required to show proof of compliance with these State and Federal regulations shall be submitted with SWP3s or abbreviated SWP3s.
(a) Ohio EPA NPDES Permits Authorizing Stormwater Discharges Associated with Construction Activity or the Most Current Version Thereof. Proof of compliance with these requirements shall be the owner's Notice of Intent (NOI) number from Ohio EPA, a copy of the Ohio EPA Director's Authorization Letter for the NPDES Permit, or a letter from the site owner certifying and explaining why the NPDES Permit is not applicable.
(b) Section 401 of the Clean Water Act. Proof of compliance shall be a copy of the Ohio EPA Water Quality Certification application tracking number, public notice, project approval, or a letter from the site owner certifying that a qualified professional has surveyed the site and determined that Section 401 of the Clean Water Act is not applicable. Wetlands, and other waters of the United States, shall be delineated by protocols accepted by the U.S. Army Corps of Engineers at the time an application is made under this regulation.
(c) Ohio EPA Isolated Wetland Permit. Proof of compliance shall be a copy of Ohio EPA's Isolated Wetland Permit application tracking number, public notice, project approval, or a letter from the site owner certifying that a qualified professional has surveyed the site and determined that Ohio EPA's Isolated Wetlands Permit is not applicable. Isolated wetlands shall be delineated by protocols accepted by the U.S. Army Corps of Engineers at the time an application is made under this regulation.
(d) Section 404 of the Clean Water Act. Proof of compliance shall be a copy of the U.S. Army Corps of Engineers Individual Permit application, public notice, or project approval, if an Individual Permit is required for the development project. If an Individual Permit is not required, the site owner shall submit proof of compliance with the U.S. Army Corps of Engineer's Nationwide Permit Program. This shall include one of the following:
(1) A letter from the site owner certifying that a qualified professional has evaluated the site and determined that Section 404 of the Clean Water Act is not applicable, and provide documentation.
(2) A site plan showing that any proposed fill of waters of the United States conforms to the general and special conditions specified in the applicable Nationwide Permit. Wetlands, and other waters of the United States, shall be delineated by protocols accepted by the U.S. Army Corps of Engineers at the time an application is made under this regulation.
(e) Ohio Dam Safety Law. Proof of compliance shall be a copy of the ODNR Division of Water permit application tracking number, a copy of the project approval letter from the ODNR Division of Water, or a letter from the site owner certifying and explaining why the Ohio Dam Safety Law is not applicable.
(Ord. 134-16. Passed 12-27-16.)
(a) In order to control sediment pollution of water resources, the owner shall submit a SWP3 in accordance with the requirements of this regulation.
(b) The SWP3 shall be certified by a professional engineer, a registered professional surveyor, certified professional erosion and sediment control, or a registered landscape architect.
(c) The SWP3 shall be amended whenever there is a change in design, construction, operation or maintenance, which has a significant effect on the potential for the discharge of pollutants to surface waters of the State or if the SWP3 proves to be ineffective in achieving the general objectives of controlling pollutants in stormwater discharges associated with construction activity.
(d) The SWP3 shall incorporate measures as recommended by the most current edition of Rainwater and Land Development as published by the Ohio Environmental Protection Agency and shall include the following information:
(1) A cover page or title identifying the name and location of the site, the name and contact information of all construction site operators, the name and contact information for the person responsible for authorizing and amending the SWP3, preparation date, and the estimated start and completion dates for construction.
(2) A copy of the permit requirements (attaching a copy of the current Ohio EPA NPDES Construction General Permit is acceptable).
(3) Site description: The SWP3 shall provide:
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. An estimate of the impervious area and percent of imperviousness created by the land disturbance.
D. A calculation of the run-off coefficients for both the pre-construction and post-construction site conditions.
E. Existing data describing the soil and, if available, the quality of any known pollutant discharge from the site such as that which may result from previous contamination caused by prior land uses.
F. A description of prior land uses at the site.
G. An implementation schedule which describes the sequence of major soil-disturbing operations (i.e., grubbing, excavating, grading, utilities and infrastructure installation) and the implementation of erosion and sediment controls to be employed during each operation of the sequence. The SWP3 shall clearly describe for each major construction activity (a) appropriate control measures and the general timing (or sequence) during the construction process that the measures will be implemented; and (b) which contractor is responsible for implementation (e.g., contractor A will clear land and install perimeter controls and contractor B will maintain perimeter controls until final stabilization).
H. The location and name of the immediate receiving stream or surface water(s) and the first subsequent receiving water(s).
I. For discharges to a municipal separate storm sewer system (MS4), the point of discharge to the MS4 and the location where the MS4 ultimately discharges to a water resource shall be indicated.
J. List TMDLs applicable for the site and demonstrate that appropriate SCMs or stormwater control measures (SCMs) have been selected to address these TMDLs. [Exhibit A identifier table for Northeast Ohio]
K. For subdivided developments a detail drawing of a typical individual lot showing standard individual lot erosion and sediment control practices. This does not remove the responsibility to designate specific erosion and sediment control practices in the SWP3 for areas such as steep slopes, stream banks, drainage ways, and riparian zones.
L. Location and description of any stormwater discharges associated with dedicated asphalt and dedicated concrete plants associated with the development area and the best management practices to address pollutants in these stormwater discharges.
M. A log documenting grading and stabilization activities as well as amendments to the SWP3, which occur after construction activities commence.
N. Each temporary and permanent stormwater practice shall be designated with an individual identification number.
O. Site map showing:
1. Limits of soil-disturbing activity of the site, including off site spoil and borrow areas.
2. Soils types should be depicted for all areas of the site, including locations of unstable or highly erodible soils.
3. Existing and proposed one-foot contours. This must include a delineation of drainage watersheds expected during and after major grading activities as well as the size of each drainage watershed in acres.
4. Surface water locations including springs, wetlands, streams, lakes, water wells, etc., on or within 200 feet of the site, including the boundaries of wetlands or stream channels and first subsequent named receiving water(s) the owner intends to fill or relocate for which the owner is seeking approval from the Army Corps of Engineers and/or Ohio EPA.
5. Existing and planned locations of buildings, roads, parking facilities, and utilities.
6. The location of all erosion and sediment control practices, including the location of areas likely to require temporary stabilization during the course of site development.
7. Sediment and stormwater management basins including their sediment settling volume and the maximum expected disturbed area that will be directed to the sediment pond during construction. The plan should include a summary of the following:
a. The required sediment storage and dewatering volumes;
b. The provided sediment storage and dewatering volumes;
c. The weir length or skimmer size, as applicable;
d. The weir length or skimmer size provided.
8. Data sheets for all sediment traps, sediment basins, and SCMs that identify contributing drainage area, disturbed area, water quality volume, sedimentation volume, dewatering volume, practice surface area, facility discharge and dewatering time, outlet type and dimensions, and any other relevant parameters for each practice.
9. A separate plan and profile view of each individual sediment settling pond and its outlet structure. Detail drawings of the outlet structure shall indicate the following elevations:
a. Pond bottom;
b. Elevation required to store the required sediment storage volume;
c. For sediment basins, the elevation at which the skimmer is attached;
d. For sediment traps, the top and bottom of the stone outlet section;
e. Elevation required to store the dewatering volume, exclusive of the sediment storage volume;
f. Elevation of the top of embankment;
g. Crest of the emergency spillway.
10. Where used as a sediment-settling pond during construction, the plan shall include a detail drawing of the temporary outlet configuration of the permanent stormwater basin with the following information specified:
a. Storage volume provided below the elevation at which the skimmer or other surface dewatering device is attached;
b. Elevation at which the skimmer or other surface dewatering device is attached;
c. Elevation at which the full dewatering zone is stored above the skimmer invert;
d. Any temporary modification to permanent outlet orifices or weirs required to ensure no discharge below the skimmer invert and only the skimmer controls the discharge up to the top of the dewatering volume;
e. Calculations of the sediment storage volume, dewatering volume and skimmer drawdown time shall also be provided.
11. The location of permanent SCMs to be used to control pollutants in stormwater after construction operations have been completed.
12. Areas designated for the storage or disposal of solid, sanitary and toxic wastes, including dumpster areas, areas designated for cement truck washout, and vehicle fueling.
13. Methods to minimize the exposure of building materials, building products, construction wastes, trash, landscape materials, fertilizers, pesticides, herbicides, detergents, and sanitary waste to precipitation, stormwater runoff and snow melt.
14. Measures to prevent and respond to chemical spills and leaks. Owners may also reference the existence of other plans (i.e., spill prevention control and countermeasure (SPCC) plans, spill control programs, safety response plans, etc.) provided that such plan addresses this requirement and a copy of such plan is maintained on site.
15. Methods to minimize the discharge of pollutants from equipment and vehicle washing, wheel wash water, and other wash waters. No detergents may be used to wash vehicles. Wash waters shall be treated in a sediment basin or alternative control that provides equivalent treatment prior to discharge.
16. The location of designated stoned construction entrances where the vehicles will ingress and egress the construction site.
17. The location of any in-stream activities including stream crossings.
(4) A soils engineering report. The City 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 and approved by the City Engineer shall be incorporated in the grading plans and/or other specifications for site development.
A. Data regarding the nature, distribution, strength, and erodibility of existing soils.
B. If applicable, data regarding the nature, distribution, strength, and erodibility of the soil to be placed on the site.
C. Conclusions and recommendations for grading procedures.
D. Conclusions and recommended designs for interim soil stabilization devices and measures, and for permanent soil stabilization after construction is completed.
E. Design criteria for corrective measures when necessary.
F. Opinions and recommendations covering the stability of the site.
(Ord. 134-16. Passed 12-27-16.)
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