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NPDES PERMIT AND SWPPP COMPONENTS
<br />DESCRIPTION OF CONSTRUCTION ACTIVITY
<br />EROSION PREVENTION AND SEDIMENT CONTROL
<br />TEMPORARY SEDIMENTATION BASIN(S)
<br />1
<br />DEVELOPER
<br />PLATINUM LAND MN, LLC
<br />1 The current Minnesota Construction Stormwater General Permit (Permit) dated August 1, 2018 is referenced in this document as the
<br />Permit
<br />The SWPPP includes the following components
<br />• Construction Documents prepared by Landform
<br />• Stormwater Management Narrative prepared by Landform
<br />• Maintenance Plan for permanent stormwater BMPs
<br />• Geotechnical Report prepared by Independent Testing Technologies
<br />All components must be kept onsite by the Operator The Operator shall contact Civil Engineer if they do not have all of the above
<br />documents
<br />SITE INFORMATION
<br />Site location Latitude xx xxxxx, Longitude -xx xxxxx
<br />Disturbed area = 34 7 ac
<br />Pre -construction impervious area within disturbed area = 01 ac
<br />Post -construction impervious area within disturbed area = 10 7 ac
<br />Net change in impervious area within disturbed area = 10 6 ac
<br />Type of stormwater management
<br />• Infiltration
<br />Erosion prevention and sediment control quantities are on sheets C3 0- C3 4
<br />SITE EVALUATION 1 ASSESSMENT 1 PLANNING
<br />1 The Operator shall have primary responsibility and significant authority for the development, implementation, maintenance, inspection
<br />and amendments to the approved SWPPP Duties include but are not limited to
<br />• Ensuring full compliance with the SWPPP and the Permit
<br />• Implementing all elements of the SWPPP, including but not limited to
<br />•• Implementing prompt and effective erosion and sediment control measures
<br />•• Implementing all non -storm water management, and good housekeeping BMPs ensuring that no materials other than
<br />Storm water are discharged in quantities, which will have an adverse effect on receiving waters or storm drain systems,
<br />etc
<br />• Conducting routine inspections and maintenance
<br />• Ensuring elimination of all unauthorized discharges
<br />• Coordinating to ensure all of the necessary corrections / repairs are made immediately, and that the project complies with the
<br />SWPPP, the Permit, and approved plans at all times
<br />STORMWATER POLLUTION PREVENTION MANAGEMENT MEASURES
<br />1 Operator must develop pollution prevention management measures, implement good housekeeping BMPs, must follow all applicable
<br />federal, state, and local building codes, Occupational Safety and Health Act (OSHA), and the general conditions and general
<br />requirements of the construction contract
<br />2 The Operator shall minimize the exposure to stormwater of any of the products, material, or wastes stored on site that may wash
<br />downstream or contaminate stormwater
<br />3 Building products that have the potential to leach pollutants must be under cover
<br />4 Chemicals and landscape materials shall be under cover to prevent the discharge of pollutants
<br />5 Operator to track progress of the following items on site maps portable toilets, material storage areas, vehicle and equipment fueling
<br />and maintenance areas, concrete washouts, paint and stucco washouts, dumpsters or other trash and debris containers, spill kits,
<br />stockpiles, any other non-structural non -storm water management BMPs, any temporarily removed structural BMPs, any changes to
<br />the structural BMPs
<br />6 Solid waste collected sediment, asphalt and concrete millings, floating debris, paper, plastic, fabric, construction and demolition
<br />debris and other wastes must be disposed of properly and must comply with MPCA disposal requirements
<br />7 Hazardous waste oil, gasoline, paint and any hazardous substances must be properly stored in sealed containers to prevent spills,
<br />leaks or other discharge Restricted access to storage areas must be provided to prevent vandalism Storage and disposal of
<br />hazardous waste or materials must be in compliance with Minn R Ch 7045 including secondary containment as applicable
<br />8 Portable toilets must be positioned so that they are secure and will not be tipped or knocked over
<br />9 Concrete and other washout waste operator must provide effective containment for all liquid and solid wastes generated by washout
<br />operations The liquid and solid wastes must not contact the ground, and the containment must be designed so that it does not result
<br />in runoff from the washout operations or areas Liquid and solid wastes must be disposed of properly and in compliance with MPCA
<br />rules A sign must be installed adjacent to each washout facility that requires site personnel to utilize the proper facilities for disposal
<br />of concrete and other washout wastes
<br />10 External vehicle washing external washing of trucks and other construction vehicles must be limited to a defined area of the site
<br />Runoff must be contained and waste properly disposed of No engine degreasing is allowed on site
<br />11 Operator shall take reasonable steps to prevent the discharge of spilled or leaked chemicals, including fuel, from any area where
<br />they will be loaded or unloaded as detailed in the Permit
<br />SWPPP CONTACT AND TRAINING INFORMATION
<br />1 Owner
<br />Platinum Land MN, LLC
<br />attn Jason Bebeau
<br />5191 159th Ave NW
<br />Andover, MN 55304
<br />763-301-4550
<br />platinumlandmn@gmail com
<br />2 Operator
<br />To Be Determined Contact Owner until Contractor Is Selected
<br />3 Long Term Maintenance And Operation
<br />To Be Determined Contact Owner until Contractor Is Selected
<br />SWPPP Designer
<br />Randy Hedlund, P E
<br />Landform Professional Services
<br />105 South Fifth Avenue, Suite 513
<br />Minneapolis, MN 55401
<br />612-252-9070
<br />rhedlund@landform net
<br />Certification U Of MN, Design Of Construction SWPPP, Exp May 31, 2022
<br />5 SWPPP Inspector / Manager.
<br />To Be Determined Contact Owner until Contractor And SWPPP Inspector / Manager is selected
<br />Certification , Exp.
<br />6 BMP Installation And Repair
<br />To Be Determined Contact Owner until BMP Installer And Maintainer is selected
<br />Certification , Exp.
<br />© LANDFORM 2021
<br />1 Construction activity includes erosion and sediment control BMPs installation, clearing and grubbing, site grading, utility installation,
<br />building construction, paving, and landscaping
<br />SCHEDULE OF BMP INSTALLATION AND CONSTRUCTION ACTIVITY
<br />1
<br />Install perimeter sediment control BMPs prior to start of other site work Refer to Grading, Drainage, Paving and Erosion Control
<br />sheet(s) for initial locations of BMPs
<br />2 Protect infiltration areas with construction fencing Install fencing prior to site grading or within 24-hours of excavating an infiltration
<br />basin
<br />3 Construct temporary sedimentation basins prior to upland disturbance Install perimeter sediment control BMPs around normal water
<br />levels within 48-hours of completion of basin grading
<br />4 Stabilize outlets from temporary sedimentation basins within 24-hours of outlet construction
<br />5 Perform work in phases to minimize disturbed area at any one time Operator to develop phasing plan prior to start of work
<br />6 Strip topsoil from areas to be disturbed and stockpile with perimeter sediment control BMPs Provide stabilization if stockpile is left
<br />longer than 14 days
<br />7 Rough grade site
<br />8 Install utilities
<br />9 Install small utilities (gas, electric, communications)
<br />10 Final grade pavement areas and compact subgrade
<br />11 Lay down pavement aggregate and compact
<br />12 Install curb and gutter Backfill after a minimum of three days and provide a minimum of two rolls of sod at the back of curb
<br />13 Construct site walks and patios
<br />14 Provide final stabilization
<br />15 Connect infiltration practices to storm sewer inlets
<br />16 Remove temporary BMPs and dispose of properly
<br />WATERS WITHIN ONE MILE OF SITE
<br />Rum
<br />Rioar
<br />Hint Golf
<br />Club
<br />MN SPECIAL (PROHIBITED, RESTRICTED, OTHER) & IMPAIRED WATERS
<br />1 Trott Brook is impaired based on the current USEPA 303(d) clean water act list for Benthic macroinvertebrate bioassessments,
<br />disolved oxygen, fishes bioassessments, is within 1 mile of this site, and stormwater does discharge to it
<br />A TMDLs have been established for this impaired water for construction related parameters and require the additional best
<br />management practices (BMPs) found it items 23 9 and 2310
<br />1 See Grading, Drainage, Paving and Erosion Control sheets for the location and type of temporary erosion prevention and sediment
<br />control BMPs See Grading and Drainage, Utility, and Landscape sheets for the location and type of permanent erosion prevention
<br />and sediment control BMPs
<br />2 Minimize Disturbed Areas and Protect Natural Features and Soil
<br />Appropriate construction practices (e g construction phasing, vegetative buffer strips, horizontal slope grading) shall be used to
<br />minimize erosion
<br />Areas not to be disturbed (buffers, infiltration basins, etc) shall be protected with construction or silt fence before work begins
<br />Operator shall develop methods to minimize soil compaction outside of building pads, pavement areas and utility trenches and shall
<br />use tracked equipment wherever practicable
<br />Topsoil shall be salvaged and reused to the extent practicable
<br />3 Phase Construction Activity
<br />Operator must not disturb more land than can be effectively inspected and maintained
<br />Sediment control practices shall be established on all down gradient perimeters before any upgradient land disturbing activities begin
<br />These practices shall remain in place until final stabilization has been established in accordance with the Permit
<br />The timing of the installation of sediment control practices may be adjusted to accommodate short-term activities such as clearing or
<br />grubbing, or passage of vehicles Any short-term activity must be completed as quickly as possible and the sediment control
<br />practices shall be installed immediately after the activity is completed However, sediment control practices shall be installed before
<br />the next precipitation event even if the activity is not complete
<br />4 Control Stormwater Flowing onto and Through the Protect
<br />The normal wetted perimeter of any temporary or permanent drainage ditch or swale that drains water from any portion of the
<br />construction site, or diverts water around the site, shall be stabilized within 200 lineal feet from the property edge, or from the point of
<br />discharge into any surface water
<br />Stabilization of the last 200 lineal feet shall be completed within 24 hours after connecting to a surface water
<br />Stabilization of the remaining portions of any temporary or permanent ditches or swales shall be complete within 14 days after
<br />connecting to a surface water and construction in that portion of the ditch has temporarily or permanently ceased
<br />Temporary or permanent ditches or swales that are being used as a sediment containment system (with properly designed rock ditch
<br />checks, bio rolls, silt dikes etc) do not need to be stabilized These areas shall be stabilized within 24 hours after no longer being
<br />used as a sediment containment system
<br />5 Stabilize Soils
<br />All exposed soil areas, including stockpiles, must be stabilized
<br />Stabilization must be started immediately to limit soil erosion when the construction activity in that portion of the site has temporarily
<br />or permanently ceased and will not resume for 14 calendar days Stabilization must be complete within 7 days of cessation of
<br />construction activity
<br />Temporary soil stockpiles shall have silt fence or other effective sediment controls, and cannot be placed in surface waters, including
<br />storm water conveyances such as curb and gutter systems, or conduits and ditches unless there is a bypass in place for the storm
<br />water
<br />Temporary stockpiles without significant silt, clay or organic components (e g clean aggregate stockpiles, demolition concrete
<br />stockpiles, sand stockpiles) and the constructed base components of roads, parking lots and similar surfaces, are exempt from this
<br />requirement
<br />6 Protect Slopes
<br />Operator shall avoid work on slopes with a grade of 31 or greater when practicable Grading on slopes with a grade of 31 or steeper
<br />will require techniques such as phasing and stabilization practices designed for steep slopes(e g slope draining and terracing)
<br />7 Protect Storm Drain Inlets
<br />All storm drain inlets shall be protected by appropriate BMPs during construction until all sources with potential for discharging to the
<br />inlet have been stabilized Inlet protection may be temporarily removed if a specific safety concern has been identified
<br />8 Provide Energy Dissipation at all Pipe Outlets within 24 Hours
<br />After connection to a surface water or permanent stormwater treatment system
<br />9 Establish Perimeter Controls and Sediment Barriers
<br />Prior to disturbing soils on a project site, establish sediment control BMPs on all down -gradient perimeters and where site discharges
<br />to public waters
<br />10 Retain Sediment On -site and Control Dewatering Practices
<br />Discharge shall not cause nuisance conditions, erosion in receiving channels, adversely affect receiving water or impact wetlands, or
<br />downstream properties Discharge points shall be adequately protected from erosion and scour by accepted energy dissipation
<br />measures
<br />Discharge water containing oil or grease shall be treated to remove oil or grease prior to discharge to surface waters
<br />Refer to Permit requirements for temporary or permanent sediment basins
<br />11 Establish Stabilized Construction Exits
<br />Vehicle tracking pads shall be established as shown on the Grading, Drainage, Paving and Erosion Control sheet(s) to minimize
<br />tracking of sediment from the construction site onto adjacent streets
<br />12 Infiltration Basin Protection
<br />Operator must not excavate infiltration systems to final grade or within three (3) feet of final grade until the contributing drainage area
<br />has been constructed and fully stabilized unless rigorous erosion prevention and sediment controls have been installed
<br />When excavating an infiltration system to within three (3) feet of final grade, operator shall mark off and protect the area from heavy
<br />construction equipment to prevent compaction of soils
<br />13 Dewatering and Basin Draining
<br />Permittees must discharge turbid or sediment -laden waters related to dewatering or basin draining to a temporary or permanent
<br />sediment basin Discharges must not cause erosion or scour near the discharge points
<br />14 Remove Sediment from Surface Waters
<br />All sediment deposits and deltas must be removed from surface waters, including drainage ways, catch basins, and other drainage
<br />systems, and the removal areas restabilized within seven (7) days
<br />This project does have more than five (5) disturbed acres draining to a common location anc The site drains to an impaired or special
<br />water, therefore a temporary sediment basin is required Temporary sediment basins will be provided with Construction Documents
<br />2 Temporary sediment basins shall provide treatment to runoff before it leaves the construction site or enters surface waters The
<br />contractor shall comply with the following requirements
<br />A Sedimentation basins must provide live storage of runoff resulting from the 2-year 24-hour rainfall event from each acre
<br />drained to the basin, with a minimum of 1,800 c f /acre live storage volume (Where no calculation has been performed, each
<br />basin shall provide at least 3,600 c f /acre live storage) Sedimentation basins must include a stabilized emergency overflow
<br />to prevent basin integrity failure
<br />B Discharge from temporary sedimentation basins will be withdrawn from the surface in order to minimize the discharge of
<br />pollutants
<br />3 Discharge from basin draining shall not adversely affect the receiving water or downstream properties Contractor will visually check
<br />to ensure adequate treatment has been obtained and that nuisance conditions will not result from the discharge
<br />4 Any discharge observed to be occurring during the inspection shall be recorded, described, and photographed
<br />5 If any proposed temporary BMPs are not working as intended refer to the "Stormwater Compliance Assistance Toolkit for Small
<br />Construction Operators", MPCA, 2017 for additional information Operator shall contact the SWPPP Designer for additional
<br />requirements and information
<br />POST CONSTRUCTION 1 PERMANENT BMPS
<br />1 See Grading and Drainage, Utility, and Landscape sheets for post construction and permanent stormwater BMPs
<br />INSPECTIONS AND MAINTENANCE
<br />1 Permittees must ensure that a trained person will inspect the entire construction site at least once every seven (7) days during active
<br />construction and within 24 hours after a rainfall event greater than 0 5-inches in 24 hours
<br />2 Inspections shall include stabilized areas, erosion prevention and sediment control BMPs, anc infiltration areas
<br />3 Surface waters on or adjacent to the site must be inspected for evidence of erosion or sediment deposition
<br />4 Permittees must record all inspection and maintenance activities within 24 hours of being conducted as detailed in the Permit
<br />5 Inspection Records content shall include
<br />A Date and time of inspections,
<br />B Name of persons conduction inspections,
<br />C Findings of inspections, including specific locations where corrective actions are needed,
<br />D Corrective actions taken including dates, times, and the party taking the corrective action,
<br />E Dates of all rainfall events greater than 1/2 inch in 24 hours (refer to Permit for measurement requirements),
<br />F Any discovered discharge must be recorded, including photographs, descriptions of discharge (color, odor, settled or
<br />suspended solids, oil sheen, or other obvious indicators of pollution), and specific location of discharge location,
<br />G Any amendments to the Permit as a result of inspections must be documented within seven calendar days as described in the
<br />Permit
<br />6 BMP Maintenance
<br />A Nonfunctional BMPs must be repaired or replaced by the end of the next business day after discovery unless a different time
<br />frame is indicated
<br />B Follow the designer's or manufacturer's recommended maintenance procedures for all BMPs
<br />C Remove sediment from BMPs when the depth of sediment has reached 1/2 the height of the BMP and properly dispose of
<br />sediment into controlled areas to prevent soil from returning to the BMP during subsequent rain events
<br />D Remove sediment from paved roadways within one calendar day of discovery
<br />E Remove sediment from around BMPs protecting storm drain inlets
<br />F Surface waters with evidence of sediment deposition must be stabilized and sediment removed within seven calendar days of
<br />discovery, or as stated by the Permit
<br />G Ensure that construction support activities, including borrow areas, waste areas, contractor work areas, and material storage
<br />areas and dedicated concrete and asphalt batch plants are cleaned and maintained
<br />H Replace damaged BMPs that no longer operate effectively
<br />7 Add BMPs as needed during construction to minimize erosion and prevent sediment from leaving the site
<br />RECORD KEEPING 1 RECORD RETENTION
<br />1 The SWPPP (original or copies), including all changes to it, and inspections and maintenance records, shall be kept at the site during
<br />construction by the Owner / Operator who has operational control of that portion of the site The SWPPP can be kept in either the
<br />field office or in an on site vehicle during normal working hours
<br />2 All Owners(s) must keep the SWPPP, along with the following additional records, on file for three (3) years after submittal of the
<br />Notice of Termination (NOT) This does not include any records after submittal of the NOT.
<br />3 The following is a list of records that shall be kept at the project site available for inspectors to review:
<br />• Copy of the SWPPP, with any modifications,
<br />• Inspection and maintenance records,
<br />• Permanent operation and maintenance agreements,
<br />• Calculations for the design of temporary and permanent stormwater management systems,
<br />• Any other permits required for the project,
<br />• Records of all inspection and maintenance conducted during construction, and
<br />• All permanent operation and maintenance agreements that have been implemented, including all right-of-way, contracts,
<br />covenants and other binding requirements regarding perpetual maintenance
<br />LOG OF CHANGES TO THE SWPPP 1 AMENDMENTS
<br />1
<br />The Owner/ Operator(s) must amend the SWPPP as necessary to include additional requirements, such as additional or modified
<br />BMPs, designed to correct problems identified or address situations as detailed in the Permit
<br />FINAL STABILIZATION
<br />The Owner/Operator(s) must ensure final stabilization of the site Final stabilization includes
<br />A Ensuring all areas have permanent cover.
<br />B Vegetative areas must have perennial cover with a density of 70% of expected final growth.
<br />TERMINATION OF COVERAGE
<br />1 Owner/Operator(s) wishing to terminate coverage under the Permit must submit a Notice of Termination (NOT) to the MPCA
<br />Compliance with the Permit is required until a NOT is submitted Refer to the Permit for details Conditions for submitting a NOT
<br />include
<br />A
<br />B
<br />C
<br />Site must have achieved final stabilization (refer to section above)
<br />The permanent stormwater treatment and conveyance systems must be clean and all accumulated sediment removed
<br />All temporary synthetic erosion prevention and sediment control BMPs must be removed from the site and disposed of
<br />properly
<br />D Single Family Residential only - Permit termination on individual lots occurs once building construction is complete,
<br />temporary erosion prevention and downgradient perimeter control is complete, the residence sells to the homeowner, and
<br />the permittee distributes the MPCA's "Homeowner Fact Sheet" to the homeowner
<br />5191 159TH AVE NW
<br />ANDOVER, MN 55304
<br />TEL 763-301-4550
<br />MUNICIPALITY
<br />PROJECT
<br />NORTH BROOK
<br />MEADOWS
<br />RAMSEY, MINNESOTA
<br />ISSUE 1 REVISION HISTORY
<br />CONTACT ENGINEER FOR ANY PRIOR HISTORY
<br />DATE
<br />ISSUE / REVISION
<br />REVIEW
<br />16 JUL 2021 PRELIMINARY PLAT SUBMITTAL
<br />CNC
<br />CERTIFICATION
<br />I hereby certify that this plan was prepared by m
<br />a duly Licensed Professional Engineer unc\
<br />0
<br />1E;oV
<br />Randall Hed__
<br />License No 19571V0
<br />ctSupervision, and that I am
<br />ate of MINNESOTA
<br />Apr p�
<br />ate
<br />Signature Signature shown is a digital reprouAbf oinWe signed copy of this plan on file at
<br />Landform Professional Servi
<br />O
<br />G
<br />an is available upon request
<br />IF THE SIGNATURE, SEAL OR FOUR LINES DIRECTLY ABOVE ARE NOT
<br />VISIBLE, THIS SHEET HAS BEEN REPRODUCED BEYOND INTENDED
<br />READABILITY AND IS NO LONGER A VALID DOCUMENT PLEASE CONTACT
<br />THE ENGINEER TO REQUEST ADDITIONAL DOCUMENTS
<br />PRELIMINARY PLAT
<br />07/16/2021
<br />• •
<br />• •
<br />ANDFORM
<br />From Site to Finish
<br />105 South Fifth Avenue
<br />Suite 513
<br />Minneapolis, MN 55401
<br />•
<br />Tel: 612-252-9070
<br />Fax: 612-252-9077
<br />Web: landform.net
<br />FILE NAME
<br />C305PLM001.DWG
<br />PROJECT NO.
<br />PLM20001
<br />MN SWPPP NOTES
<br />C3.5
<br />Landform®and Site to Finish®are registered service marks of Landform Professional Services, LLC
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