|
STORM WATER POLLUTION PREVENTION PLAN (SWPPP)
<br />CONSTRUCTION NOTES:
<br />Construction shall be in accordance with the MPCA NPDES General Storrnwater Permit for construction activity, plans,
<br />Mn/DOT Spec. Book, Standard Specifications for Construction and the special provisions.
<br />The Contractor shall maintain a stockpile of erosion control devices at all times for immediate usage.
<br />The Contractor shall keep the inspection and maintenance log.
<br />See permit Part III.E for SWPPP record retention requirements.
<br />In the event of accidental sediment or pollutant discharge, the City, MPCA local contact and/or State Duty Officer shall be
<br />notified. The MPCA State Duty Officer can be reached at (800) 422-0798.
<br />TRAINING REQUIREMENTS:
<br />1. The Permittee(s) shall ensure the individuals Identified in this part have been trained in accordance with the NPDES CSW
<br />Permit's training requirements. The Permittee(s) shall ensure the training is recorded in or with the SWPPP before the start
<br />of construction or as soon as the personnel for the project have been determined.
<br />a. Who must be trained:
<br />I. Individuai(s) preparing the SWPPP for the project.
<br />II. Individuals) overseeing implementation of, revising, and amending the SWPPP and individual(s) performing
<br />inspections. One of these individual(s) must be available for anon site inspection within 72 hours upon request by
<br />the MPCA.
<br />iii. Individual(s) performing or supervising the installation, maintenance, and repair of BMPs. At least one individual
<br />on a project must be trained In these job duties.
<br />It. Training content. The content and extent of training must be commensurate with the individual's job duties and
<br />responsibilities with regard to activities covered under this permit for the project. At least one Individual present on the
<br />permitted project site (or available to the project site in 72 hours) must be trained in the job duties described in
<br />Part III.F.1.b and Part III.F.I.c.
<br />C. Training documentation:
<br />L Documentation must be recorded with the SWPPP prior to the start of construction.
<br />it. Names of the personnel associated with this project that are required to be trained per Part III.F of this permit.
<br />iii. Dates of training and name of Instructor(s) and entity providing training.
<br />iv. Content of training course or workshop (including number of hours of training).
<br />d. The Permittee(s) shall ensure that the individuals are trained by local, state, federal agencies, professional
<br />organizations, or other entities with expertise in erosion prevention, sediment control or permanent stormwater
<br />management such as the University of Minnesota, Minnesota Erosion Control Association, Soil and Water Conservation
<br />Districts or the MPCA.
<br />EROSION PREVENTION MEASURES:
<br />1. Temporary or permanent stabilization of exposed soils, including stockpiles, shall be initiated immediately to limit soil
<br />erosion whenever any construction activity has temporarily or permanently ceased on any portion of the site and will not
<br />resume for a period exceeding 7 calendar days. (Permit Part IV.B.4).
<br />2. The normal wetted perimeter of any temporary or permanent drainage ditch or swale that drains water for any portion of
<br />the construction site, within 200 lineal feet, must be completed within 24 hours after connecting to a surface water or
<br />property edge. Apply mulch, hydromulch, taclfler, polyacrylamide, or similar practice is not acceptable stabilization in any
<br />part of a drainage ditch or swale. (Permit Part W.B.4).
<br />3. Use check dams along length of conveyance channels. (Permit Part IV.B.3).
<br />4. Temporary or permanent energy dissipation devices must be installed at pipe outlets within 24 hours after connection to a
<br />surface water.
<br />SEDIMENT CONTROL MEASURES:
<br />1. In order to maintain sheet flow and minimize rills and/or gullies, there shall be no unbroken slope length of greater
<br />than 75 feet for slopes with a grade of 1:3 or steeper.
<br />2. Sediment control practices must be established on all down gradient perimeters and upgradient of any buffer zones. These
<br />practices shall remiain in place until final stabilization has been achieved and the Permit NOT form has been submitted
<br />to the MPCA.
<br />3. Temporary soil stockpiles must have silt fence or other effective sediment controls, and cannot be placed in surface
<br />waters, including stormwater conveyances such as curb and gutter systems, or conduits and ditches unless there is
<br />a bypass in place for the stormwater.
<br />4. Vehicle tracking of sediment from the construction site (or onto streets within the site) must be minimized by
<br />Best Management Practices (BMPs) such as stone pads, concrete or steel wash racks, or equivalent systems. Tracked
<br />sediment onto paved surfaces must be removed daily, at minimum.
<br />5. Per Part IV.C.I.b, if down gradient sediment controls are overloaded, additional upgradient sediment control practices
<br />or redundant BMPs to eliminate overloading must be installed, and the SWPPP must be amended.
<br />5. See permit Part IV.C.3 for instructions on re -installation of sediment control practices after they've been adjusted.
<br />7. See permit Part IV.C.4 for instructions on the removal of storm drain inlet protection BMPs.
<br />THE DESCRIPTION OF INSPECTIONS AND MAINTENANCE:
<br />1. The Permittee(s) (either the owner or operator, whoever is Identified In the SWPPP) must routinely inspect the entire
<br />construction site at least once every seven (7) days during active construction and within 24 hours after a rainfall
<br />event greater than 0.5 inches in 24 hours.
<br />INSPECTION AND MAINTENANCE REQUIREMENTS MUST INCLUDE:
<br />- Date and time of inspections. All inspections and maintenance conducted during construction shall be recorded within 24 hours
<br />in writing and these records must be retained in the SWPPP
<br />- Name of person(s) conducting inspections.
<br />- Findings of inspections, including specific locations where there are recommendations for corrective actions.
<br />Corrective actions taken (including dates, times, and party completing maintenance activities).
<br />Date and amount of all rainfall events greater than 1/2 inch (0.5 inches) in 24 hours. Rainfall amounts must be obtained by a
<br />properly maintained rain gauge onsite, a weather station within 1 mile of the project location, or a weather reporting system
<br />that provides site specific rainfall data from radar summaries.
<br />- Documentation of changes and any amendments made to the SWPPP must be completed within 7 calendar days. See permit
<br />Part III.B for amendments to SWPPP.
<br />- Construction site vehicle exit locations must be inspected for evidence of off -site sediment tracking onto paved surfaces.
<br />Tracked sediment must be removed from all paved surfaces, within 24 hours of discovery, or if applicable, within a shorter
<br />time to comply with Part IV.C.6.
<br />- Infiltration and Bioretentlon facility must be Inspected for sedimentation.
<br />Discharges discovered during inspections shall be documented per NPDES CSW Permit part IV.E.2.F.
<br />MAINTENANCE PERFORMANCE:
<br />1. All nonfunctional BMPS must be repaired, replaced, or supplemented with functional BMPs by the end of the next business day
<br />after discovery, or as soon as field conditions allow access unless another time frame is specified that is not less restrictive
<br />than permit requirements. See permit Part IV.E.5 for specific requirements.
<br />POLLUTION PREVENTION MANAGEMENT:
<br />1. Solid Waste: Sediment, asphalt and concrete millings, floating debris, paper, plastic, fabric, construction and
<br />demolition debris and other wastes must be properly collected, stored, and disposed of in accordance with Minn. R.ch.7035.
<br />This includes any materials used for erosion control.
<br />2. Hazardous and Toxic Materials: Includes, but Is not limited to: OII, gasoline, paint and any hazardous substances must be
<br />properly stored, including secondary containment, to prevent spills, leaks or other discharge. Restricted access to storage
<br />areas must be provided to prevent vandalism. Storage and disposal of hazardous waste must be in accordance with Minn.R.Ch.7045
<br />3. External washing of trucks and other construction vehicles must be limited to a defined area of the site. Runoff must be
<br />contained and waste properly disposed of.
<br />4. No engine degreasing is allowed on site.
<br />S. Concrete washout onsite: All liquid and solid wastes generated by concrete washout operations must be contained In a
<br />leak -proof containment facility or impermeable liner. A compacted clay liner that does not allow washout liquids to enter
<br />ground water is considered an impermeable liner. The liquid and solid wastes must not contact the ground, and there must
<br />not be runoff from the concrete washout operations or areas. Llquld and solid wastes must be disposed of properly and in
<br />compliance with MPCA regulations. A sign must be installed adjacent to each washout facility to inform concrete equipment
<br />Operators to utilize the proper facilities.
<br />6. Building products that have the potential to leach pollutants must be under cover. (NPDES CSW Permit Part IV.F.I.a)
<br />7. Pesticides, herbicides, insecticides, fertilizers, treatment chemicals, and landscaped materials must be under cover.
<br />(NPDES Permit Part IV.F.1.b).
<br />8. Portable toilets must be positioned so that they are secure and will no be tipped or knocked over. Sanitary waste must be disposed
<br />of properly in accordance with Minn.R.ch.7041. (NPDES CSW Permit Part IV.F.I.e)
<br />9. Spill Prevention and Response Requirements: Adequate supplies must be available at all times to clean up discharged materials and
<br />an appropriate method must be available for recovered spilled materials. Spills must be reported and cleaned up immediately as
<br />required by Minn. Stat. 115.061 using dry cleanup measures where possible.
<br />FINAL STABILIZATION:
<br />1. Permanent stabilization of exposed soils, including stockpiles, shall be initiated Immediately to limit soil erosion whenever any
<br />construction activity has permanently ceased on any portion of the site and will not resume for a period exceeding 7 calendar
<br />days.
<br />2. All sediment must be removed from permanent stormwater management system and conveyance systems.
<br />3. See landscape sheets for turf establishment.
<br />4. Final stabilization is achieved by a uniform perennial vegetative cover with a density of 70% of expected growth over the entire
<br />pervious area.
<br />i
<br />Y W Z
<br />Z
<br />W
<br />J 0 0 W
<br />Z U =
<br />of p Q�
<br />J U W Y
<br />O O LO w
<br />r1) W LI)
<br />aC
<br />DISCHARGE TO WETLANDS:
<br />1. If there is a wetland impact caused by filling, draining, excavation or inundation, how has that impact been addressed by W
<br />permits or other approvals from an official statewide program (U.S. Army Corps of Engineers 404 program, Minnesota Z
<br />Department of Natural Resources, or the State of Minnesota Wetland Conservation Act)? If the impact is considered p
<br />exempted or non jurisdictional by theses programs, how is the impact in conformance with the sequence mitigation
<br />requirements of MPCA water quality standards in MN Rule 7050.0186 PTS
<br /><https://www.mvisor.leg.state.mn.us/rules/?id=7050.0186> rrRD 3RRnca9, rRC.
<br />IMPAIRED AND SPECIAL WATERS
<br />sse Rr sere sr.
<br />The Mississippi River Is a scenic and recreational river within one mile of the project discharge point, and the project must follow guidelines enr�.u(so7jwaei iirar
<br />in Stornwater Manual App B (C.1, C.2, C.3) tear) 884-W98
<br />aam•m.�
<br />KARST AREA PROTECTION:
<br />Thera are no known Karst features in the City of Elk River.
<br />CALCAREOUS FENS:
<br />No calcareous Fen sites exist on this project.
<br />CHECKED By: KLB
<br />OESIONEO ey: KLB
<br />JOB NO. XXXX
<br />
|