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TBLL SWPPP 100620STORM SEWER POLLUTION PREVENTION PLAN (SWPPP) THE BLUFFS AT LAKE LUCY 1. CONSTRUCTION ACTIVITY INFORMATION This SWPPP was prepared by personnel certified in the design of construction SWPPPs. Copies of certifications are available upon request. (Sathre-Bergquist, Inc. - Mike Vanguilder- 952-476-6000) Project Name: The Bluffs at Lake Lucy Project Location: Address : 6921 Galpin Blvd City: Chanhassen State: Minnesota Zip Code: 55317 County Parcel ID Number (PID): 256900022, 256900030,250100100 Project Type: Residential Commercial/Industrial Road Construction Residential/Road Construction Other Cumulative Impervious Surface Stockpiles are to be stabilized with the use of erosion blanket if unworked for 7 days or more. with construction activity, or the SWPPP is not consistent with the terms and conditions of this permit. Number of acres to be disturbed: 4. At any time after permit coverage is effective, the MPCA may determine that the project's stormwater 19.6 (tenths of an acre) Pre -construction acres of impervious surface: system. The utility contractor will be required to install inlet protection per the City's details (#5302A). 1.0 (tenths of an acre) Post -construction acres of impervious surface: (Impaired Waters and TMDLs). If a water quality standard changes during the tens of this permit, the MPCA will 6.1 (tenths of an acre) Total new impervious surface acres: treatment pond to the wetland after treatment. These structures will serve to provide skimming and rate control. Rip -rap will be placed at the base of all aprons to provide erosion 6.1 (tenths of an acre) Receiving Waters Permittee(s) in writing. In response, the Permittee(s) must amend the SWPPP to address the identified concerns Methods to minimize vehicle tracking at construction exits and street sweeping activites Name of Water Body Type Special Water? Impaired? Water? Lake Lucy Lake No No Lake Ann Lake No No Riley Creek Creek No No Bluff Creek Creek No Yes Dates of Construction Construction Start Date: 10/12/2020 Estimated Completion Date: 10/31/2022 2. General Construction Project Information Personnel & Training Certified erosion control supervisor in good standing with who is knowledgeable & experienced in the application of erosion prevention & sediment control BMPs. (Enebak Construction - Joe Retka - 952-479-6700) Supervisor shall work with the project engineer/City of Chanhassen to oversee implementation of the SWPPP & the installation, inspection & maintenance of the erosion control BMPs. Long term O&M of permanent stormwater treatment systems after construction is complete and acceptance of improvements are made by City Council - (City of Chanhassen - Water Resources Coordinator- PHONE #952-227-1160) Chain of Responsibility Owner / Developer & Contractor are co-permitees for the National Pollutant Discharge Elimination System (NPDES) Construction Permit. Contractor is responsible to comply with all aspects of the NPDES Construction Permit at all times until the Notice of Termination (NOT) has been filed with the MPCA or transferred to home builder or another contractor. Contractor will develop a chain of command with all operators on the site to ensure that the SWPPP will be implemented & stay in effect until construction is complete, the site has final stabilization & NOT has been submitted to the MPCA Describe the construction activity This +/- 29.0 acre development will consist of the land development of 31 single family detached homes, and 2600 linear feet of streets. Other soil disturbing activites will include: home building, driveway construction, and lot landscaping. This project will be mass graded and constructed in 2 phases , grading will be completed in 2020, and utilities completed in 2021. Soil disturbing activities will include: Demolition of the existing structures, installation of a rock entrance berm, clearing and grubbing, installation of utilities/minor utilities(including private utilities-gas,cable,electdc, etc..), the installation of silt fence and tree fence prior to grading, the installation of silt fence around the proposed ponding areas after the grading is complete, grading, re -spreading topsoil, and grading restoration which will consist of seeding and mulching all disturbed areas outside of the street row. Erosion blanket will also be installed on all 3:1 slopes or greater. Additional erosion blanket may be used throughout the site. See the Erosion & Sediment Control Plan for specific locations. 3. SWPPP Amendments The SWPPP must be amended as necessary to include additional requirements, such as additional or modified BMPS that are designed to correct problems identified or address situations whenever: 1. There is a change in design, construction, operation, maintenance, weather or seasonal conditions that has a significant effect on the discharge of pollutants to surface waters or underground waters. 2. Inspections or investigations by site owner or operators, USEPA , MPCA, or City officials indicate the SWPPP is not effective in eliminating or significantly minimizing the discharge of pollutants to surface waters or underground waters or that the discharges are causing water quality standard exceedances (e.g., nuisance conditions as defined in Minn. R. 7050.0210, subp. 2). 4. Temporary Erosion Prevention Practices Home building BMPs Describe types of erosion prevention Bn expected to be implemented Single family lots within the overall site will be disturbed on a lot by lot basis as lots are sold & homes are constructed. Home construction shall disturb Perimeter Control shall be established around the site & around the base of stockpiles if the stockpile will remain longer than 30 days. Perimeter control is typically established with silt previously stabilized areas. Typically entire lots will be disturbed as finish grading is completed. Areas not to be disturbed are typically designated by the use fence which also deliniates areas not to be disturbed. Silt Fence locations are shown on the Grading & Erosion Control plans. Where possible 5Dft buffers shall be maintained around of silt fence. Topsoil shall be preserved by stockpiling with sediment control installed around the perimeter of the stockpile. Individual lots under construction surface waters & wetland. Dual perimeter controls shall be installed if work is to take place within 50ft of surface waters & wetlands. shall also install vehicle tracking measures such as rock entrance berm or other tracking control BMP to maintain clean streets. Home builders shall be responsible for erosion & sediment control installation, maintenance, SWPPP inspection and record keeping for lots under their construction. Erosion blanket will be installed on all 3:1 or greater slopes. During construction a. Stabilization of all exposed areas must be initiated immediately to limit soil erosion but in no case later than seven (7) days after the construction activity in that portion of the site has temporarily or permanently ceased. Once grading is complete, temporary erosion BMPs shall be installed immediately (ie. bio -rolls, erosion blanket, ditch checks, etc). No later than seven (7) days of grading completion, the permanent stabilization should be in place. b. Temporary sediment basin requirements described in Section 14, must be used for common drainage locations that serve an area with ten (10) or more acres disturbed at one time. This project is being mass graded and constructed in 2 phases. The permanent dry sediment basins shall be constructed first and all on-site drainage shall be routed to the ponds. The site does not have any concentrated swales that will directly discharge off-site List anticipated BMP Quantities • Silt Fence (Before Construction) - 9,525 LF • Silt Fence (After Construction) - 940 LF • Erosion Blanket -6,325 SY • Inlet protection devices - 43 • Concrete Washout areas - 2 Rock Entrances - 2 Methods of dissipating velocity along stormwater conveyance channels/ outlets • Rip -rap will be used at all flared -end structures Check Dams - Installation of check dams or other grade control practice to ensure sheet flow and prevent rills (for slopes greater than 75 feet with a grade of 3:1 or steeper) Methods to be used for stabilization of ditch and swale wetted perimeters Bio -rolls shall be used for stabilization of ditches and swales as shown on the Erosion Control Plan. Methods to be used for energy dissipation at pipe outlets • Rip -rap will be used at flared -end structures for energy dissipation. See plan for quantities. Methods to be used to promote infiltration and sediment removal on the site prior to discharge • The water quality volume that must be treated by the project's permanent stormwater management system described in Section 16. shall be 1/2 inch of runofffrom the new impervious surfaces created by the project. See Section 16 for more information on infiltration design and appropriate site conditions. If it is determined that site conditions are not appropriate for infiltration (e.g. lack of 3 ft. of separation to seasonally saturated ground water, proximity to bedrock, contaminated soils) the reasons should be documented in the Stormwater Pollution Prevention Plan (SWPPP) for the project. Infiltration is not required in Hydrologic Soil Group D soils. Clay soils throughout the site resulted in volume reduction being achieved via infiltration basin and (2) of the onsite ponds. Timelines to be implemented on site for completing the installation of the erosion prevention BMPs . Prior to Grading - Silt and tree fence to locate grading limits and provide down gradient sediment control. Rock Entrance Berm to be installed. Home Construction BMP Phasing Protect lot area through use of one or a combination of the following; silt fence (#5302B -5302E), mulch, bio -rolls, rock entrance berm, sod buffers or other approved method. In areas within 50ft of surface waters redundant controls shall be installed if a 5011 buffer cannot be maintained. Establish staging / material storage area & Install temporary sanitary Facilities& supply dumpsters Install Rock entrance berm, maintain clean streets install drainage protection on down gradient inlets. Prevent & manage spills of stored substances Home Construction maintain rock entrance berm & perimeter controls Manage & protect stockpiles trench, install & connect utilities Continue vertical construction Keep streets clean at all times & maintain inlet protection Fine grade pads, Upon completion of fine grading pads & home construction soils disturbing activities, each lot shall be stabilized with sod, seed, mulch, hydromulch (if required), hydroseed (if applicable), straw matting or combination there of. Monitor stabilized areas until final stabilization is achieved Maintain clean streets Perimeter & temporary erosion & sediment controls are to remain in place until all up gradient areas have been permanently stabilized. Post Construction Remove silt fence after once final vegetation stabilization is established Remove inlet protection Remove all construction materials & debris from site clean all drainage structures Remove all temporary erosion & sediment control BMPs & stabilize areas left disturbed. File NOT for individual lot 6. Permanent Stormwater Management System Grading - Erosion blanket will be utilized on all 3:1 slopes. Biorolls will be used in rear yard swales. MnDot seed mix #250 will be spread at a rate of 100 lbs./acre and fertilize with Will the project result in one acre or more of new impervious area? -YES 20-0-10 at 100 lbs./acre. Only phosphorus free fertilizer shall be used. If Yes, Utility & Street Work - Inlet protection on all storm sewer catchbasins. Weekly street sweeping (includes vac) to prevent off-site vehicle tracking. However weekly sweeping may not be adequate. Sweeping is required 24 hours after discovery of track out. • Permanent BMPs - Sediment bays are to be installed at flared end sections draining into dry pond and infiltration areas. Rip -rap to provide provide energy dissipation and prevent erosion. Additional Erosion Control Prevention Measures tobe Implemented on Site • Erosion Blanket- This blanket will be installed as indicated on the erosion and sediment control plan. It will provide slope protection until final stabilization. For retaining wall construction the grading contractor will install Erosion blanket on the temporary 1:1 slopes until the wall construction can be completed. • Bio -rolls - Bio -rolls will be installed in Swale areas to help slow runoff and minimize erosion. • Seeding Restoration - Temporary/Permanent Stabilization (Seeding and Mulching) - Temporary seeding and mulch must be placed on all disturbed soil within 14 days, unless actively being worked on. All disturbed areas will be restored with 4" to 6" of topsoil. The restoration shall begin within 72 hours of the grading completion. The seed mix shall be MNDot Mix No. 25-141 applied at a rate of 100 lbs/acre and fertilized with 20-0-10 at a rate of 100 lbs. per acre. The mulch shall be Type 1 and applied at a rate of 2 tons per acre, disc anchored (with disc blades set nearly straight) immediately after placement. • Sodding - Two types of sodding will be done with this project. The first will be for erosion control protection for the streets, after the installation of the curb and the minor utilities the contractor will install two rows of sod behind the curb for a temporary erosion protection. The second type of sod will be for the yards once the house construction is complete. 5. Temporary Sediment Control Practices Methods of sediment control BMPs to be implemented on site • Sediment controls for temporary or permanent drainage ditches and sediment basins that are designed as part of a treatment system • Temporary sediment basins with faircloth skimmers are to be used on site if necessary. Locations of basins to be determined by grading contractor. Proposed detention areas can be used as as long as accumulated sediment is removed and asbuilt provided showing detention areas meet approved design volumes • Installation of check dams or other grade control practice to ensure sheet flow and prevent rills (for slope lengths greater than 75 feet with a grade of 3:1 or steeper). • Sediment control practices on all down gradient perimeters prior to land disturbing activities. • Storm drain inlet protection for all inlets. • Silt fencing or other sediment control surrounding temporary soil stockpiles. • Minimize vehicle tracking of sediments (e.g., stone pads, concrete or steel wash racks, or equivalent systems). • Street sweeping of tracked sediment (includes vac) Dust control to be monitored on site and addressed accordingly (is water truck) Methods to be used for down gradient perimeter control • Silt Fences- are designed as a temporary sediment barrier consisting of a filter fabric attached to steel support posts. This site has three applications for silt fence. These applications are as follow: 1. the installation of silt fence along the grading limits to protect the wetlands from sediment during the grading and utility construction process, 2. the installation of silt fence around the created ponds and basin areas after construction to control the sediment runoff until the turf is established and the development is completed, 3. the installation of silt fence surrounding temporary stockpiles. If down gradient BMPs are overloaded (based on frequent failure or excessive maintenance), additional up gradient BMPs shall be installed to eliminate the overloading. The inspector or contractor shall notify the design engineer to establish appropriate up gradient BMP's or elimate any point load sources. Methods to be used to contain Stockpiles Silt fence- will be used to provide perimeter control around stockpiles. 3. The SWPPP is not achieving the general objectives of minimizing pollutants in stormwater discharges associated Stockpiles are to be stabilized with the use of erosion blanket if unworked for 7 days or more. with construction activity, or the SWPPP is not consistent with the terms and conditions of this permit. . Dewatering shall be routed to the sedimentation ponds for treatment before leaving site. Dewatering plan to be provided if needed by contractor. 4. At any time after permit coverage is effective, the MPCA may determine that the project's stormwater Methods to be used for storm drain inlet protection Storm Drain Inlet Protection - Storm drain inlet protection is a sediment barrier placed around a storm sewer inlet. This structure traps sediment before it enters the storm sewer discharges may cause, have reasonable potential to cause, or contribute to non -attainment of any applicable system. The utility contractor will be required to install inlet protection per the City's details (#5302A). w water quality standard, or that the SWPPP does not incorporate the applicable requirements in Part III.A.6., SERs soR` (Impaired Waters and TMDLs). If a water quality standard changes during the tens of this permit, the MPCA will . Outlet Structures and Outlet Protection - There are wetlands located within & adjacent to this project, as a result outlet structures are proposed to transfer water from the storm water make a determination as to whether a modification of the SWPPP is necessary to address the new standard. If treatment pond to the wetland after treatment. These structures will serve to provide skimming and rate control. Rip -rap will be placed at the base of all aprons to provide erosion the MPCA makes such determination(s) or any of the determinations in Parts 111.6.1.-3., the MPCA will notify the protection by protecting the downstream soils from turbulence and high discharge velocities. Permittee(s) in writing. In response, the Permittee(s) must amend the SWPPP to address the identified concerns Methods to minimize vehicle tracking at construction exits and street sweeping activites and submit information requested by the MPCA, which may include an individual permit application. If the . Temporary Rock Construction Entrance - A rock entrance berm is constructed of coarse clean rock installed at the proposed entrance point for all construction vehicles. A detail of MPCA's written notification requires a response, failure to respond within the specified timeframe constitutes a the rock entrance berm is shown on the final grading plan. This stone pad provides a tire cleaning mechanism for all vehicles leaving the site. There is one entrance for this project. permit violation. Please see the Erosion & Sediment Control Plan for location of rock entrance berm. . Street Sweeping - Weekly street sweeping shall be taken place. However weekly sweeping may not be adequate. Sweeping is required 24 hours after discovery of track out. Methods to be used to minimize soil compaction and preserve top soil (unless infeasible) on site Topsoil will be stripped and stockpiled. Grading operations will be performed and held down 0.6to allow for topsoil respread. Measures to be used if Dewatering is required on site . Dewatering shall be routed to the sedimentation ponds for treatment before leaving site. Dewatering plan to be provided if needed by contractor. )RAWING NAME NO. BY DATE REVISIONS USE (INCLUDING COPYING, DISTRIBUTION, AND/OR CONVEYANCE OF INFORMATION) OF THIS PRODUCT IS STRICTLY PROHIBITED WITHOUT I HEREBY CERTIFY THAT THIS PLAN OR SPECIFICATION WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I SERs soR` SHEETS GRADING _01 MJV 07/29/20 LAYOUT REVISIONS _ --- DRAWN BY 02 08/2_7/2_0_ RPBC_WD_C_OM_MENTS SATHRE-BERGQUIST, INC.'s EXPRESS WRITTEN AUTHORIZATION. USE WITHOUT AMA DULY REGISTERED PROFESSIONAL ENGINEER UNDER THE U TCW 03 _MJ_V 09/0_4/2_0 _ _ _ CITY COMMENTS SAID AUTHORIZATION CONSTITUTES AN ILLEGITIMATE USE AND SHALL THEREBY LAWS OF THE STATE OF MINNESOTA. w N CHECKED BY 04 _MJ_V MJV 09/14/20 _ _ _ _ _ _ _ _ CITV COMMENTS _ — INDEMNIFY SATHRE-BERGQUIST, INC. OF ALL RESPONSIBILITY. SATHRE-BERGQUIST, INC. RESERVES THE RIGHT TO HOLD ANY ILLEGITIMATE LesbrXilk wmpbx N 2Y Ve+cem slopes RSM 05 MJV 09/23/20 & RPBCWD COMMENTS USER OR PARTY LEGALLY RESPONSIBLE FOR DAMAGES OR LOSSES RESULTING I— '" ROBERT S. M LSTAD, P.E. / Zpl-/�L8 DATE 06 _MJ_V 09/2_9/2_0 _ _ _CITY _ _ _CITY &_RPBCW_D COMMENTS— — FROM ILLEGITMATE USE. 04FRS 07/06/20 07 MJV 10/05/20 CITY & MCES COMMENTS 6.1 Date:07 08 ZO Lic. No. rblale fa An4alMerest Where a project's ultimate development replaces vegetation and/or other pervious surfaces with one (1) or more acres of cumulative impervious surface, the Permittee(s) must design the project so that the water quality volume of one (1) inch of runoff from the new impervious surfaces created by the project is retained on site (i.e. infiltration or other volume reduction practices) and not discharged to a surface water. For purposes of this part, surface waters does not include manmade drainage systems that convey stormwater to a compliant permanent stormwater management system. A copy of the Stormwaer Management Report is available through the owner or engineer upon request. Soil data and water level map is included in the Stormwater Management Report. Coelom Sal 11-1. Report Soil Map 0 1A4lla, 8y,KEe1 aepumi Aaee 1.401 Femen, e}�OI Ex Ess.Aw-, bem 88 18.1% XM mel loam. O b 2 Wrur4 N sbpn 2.5 88% Ka WlNanny-LeOar bare. 2 b6 paroem abpn 3. B.A% KC Les,arXlIXenny loan¢. 6,o12 m.bpe. U 1..1% KC2 LerLerXiIX yco om6b moaealey.,oaea 43 118% KOemr4Gkarmy loans. 12 119 La�rosmabpes 19 38% KE2 LesbrXilk wmpbx N 2Y Ve+cem slopes 4A 111x KF Lemer4Gbemy eompbs, 22b m perrwm abyss 39 168% MK Mosbepo aq Xolgl,lon cars, o b 1 perren, byes 2.5 U% up WosanerenE wakepa so4. w.,o.a. o b 1 pmwa sbpes U 54% w wew 6.1 as% rblale fa An4alMerest 37.7 1 I CITY 2020-12 SWPPP SATHRADWBERGQAY WAYZATA, N 51ST5391 521NCo150 SOUTH CHANHASSEN, THE BLUFFS AT LAKE LUCY MINNESOTA CHAN THREE DEVELOPMENT, INC. FILE NO. 3120-079 SWPi Mul STORM SEWER POLLUTION PREVENTION PLAN (SWPPP) THE BLUFFS AT LAKE LUCY 7. Inspection and Maintenance Activites Identify individual responsible for installing, supervising, repairing, inspecting, and maintaining erosion prevention and sediment control BMPs on site The owner, CHAN THREE DEVELOPMENT, INC., will be responsible for the operation and maintenance of the erosion and sediment control BMPs. He will select individuals who will be responsible for the inspections, maintenance, and repair activities, and for filling out the inspection and maintenance reports. (SWPPP Designer - Mike Vanguilder - 952-476-6000) (SWPPP Inspection - Enebak Construction - Curt Loken (Project Manager)- 612-366-2891 & Darin Neske (Site Foreman) -612-366-2912) (Erosion Installation - Advanced Seeding & Erosion - Mike Degross - 952-367-7221) The City of Chanhassen will operate and maintain the stormwater ponds after construction is complete and acceptance of improvements are made by City Council . (Water Resources Coordinator - 952-227-1160) The owner shall keep the SWPPP and all supporting documents for three years after the Notice of Termination (NOT). These documents include, but aren't limited to, the SWPPP Narrative, any amendments, inspection and maintenance records, any stormwater related permits, any permanent operation and maintenance agreements, and calculations for temporary and permanent stormwater management systems. Procedures to routinely inspect the construction site including: 1. Description of record-keeping requirements and content A maintenance/inspection report will be made after each inspection. A copy of the report will be sent to the City. a. Date/Time of inspections b. Name of person conducting inspections C. Findings of inspections, including locations where corrective actions are needed d. Corrective actions taken e. Date and amount of rainfall events greater than z inch (0.5 inches) in 24 hours. Rainfall amounts must be obtained by a properly maintained rain gauge installed onsite or a weather station that is within 1 mile of your location or a weather reporting system that provides site specific rainfall data from the radar summaries. f. If any discharge is observed to be occurring during the inspection, a record of all points of the property from which there is a discharge must be made, and the discharge should be described (i.e., color, odor, floating, settled, or suspended solids, foam, oil sheen, and other obvious indicators of pollutants) and photographed. g. Any amendments to the SWPPP proposed as a result of the inspection must be documented as required in Section 6 within seven (7) calendar days. 2. Frequency of Inspections Once every seven (7) days during active construction and; Within 24 hours after a rainfall event greater than 0.5 inches in 24 hours, and within seven(7) days after that 3. Areas to be Inspected (areas near wetlands temp sediment basins/fairoloth skimmers inlet protection any offline stormwater conveyance) • The silt fence will be installed prior to any site grading. • Only about one half of the site will be exposed at any given time. The grading contractor will be finishing lots as the cuts and fills are achieved in accordance with the approved grading plan. • All erosion control measures will be inspected every week and following any storm event greater than 0.5" in a 24 hour period. • All erosion control measures will be maintained in good working order, maintenance and repairs will be initiated within a 24 hour period of the report. Monitoring of all repairs will be done. • Built up sediment will be removed from all silt fence when it has reached one-half of the fence height. • Silt fence will be inspected for depth of sediment, tears, and to see if the fabric is securely attached to the steel fence posts, and to see if the fence posts are firmly in the ground. • The pond and infiltration/filtration area will be monitored for depth of sediment, and the build up of sediment will be removed at the end of the project, if necessary. • The embankment around the ponds and infiltration/filtration areas will be inspected for any breaches or erosion scars, over compaction and any repairs needed, will be promptly made. • The seeding and mulching will be inspected for any bare spots, washouts, and for healthy growth. 4. Additional Inspection notes • Temporary and permanent sedimentation basins must be drained and the sediment removed when the depth of sediment collected in the basin reaches one-half (1/2) the storage volume. Drainage and removal must be completed within 72 hours of discovery, or as soon as field conditions allow access (see Part IV.D.). • Surface waters, including drainage ditches and conveyance systems, must be inspected for evidence of erosion and sediment deposition during each inspection. The Permittee(s) must remove all deltas and sediment deposited in surface waters, including drainage ways, catch basins, and other drainage systems, and restabilize the areas where sediment removal results in exposed soil. The removal and stabilization must take place within seven (7) days of discovery unless precluded by legal, regulatory, or physical access constraints. The Permittee(s) shall use all reasonable efforts to obtain access. If precluded, removal and stabilization must take place within seven (7) calendar days of obtaining access. The Permittee(s) is/are responsible for contacting all local, regional, state and federal authorities and receiving any applicable permits, prior to conducting any work in surface waters. • Construction site vehicle exit locations must be inspected for evidence of off-site sediment tracking onto paved surfaces. Tracked sediment must be removed from all paved surfaces both on and off site within 24 hours of discovery, or if applicable, within a shorter time to comply with Section 9. Street sweeping and vac truck to be used to control sediment tracking. If site conditions result in a needed erosion or sediment control BMP that is not planned for, the inspector or contractor shall contact the design engineer at Sathre-Bergquist Inc. (Bob Molstadf- 952.476.6000) to determine an appropriate plan and BMP to stabilize the affected area. 8. Pollution Prevention Management Measures Practices for storage of pesticides, herbicides, insecticides, fertilizers, treatment chemical, and landscape materials • Petroleum Products: All onsite vehicles and equipment will be monitored for leaks and receive regular preventative maintenance to reduce the chance of leakage. Petroleum products will be stored in a tightly sealed container, which is clearly labeled. Any asphalt substances used onsite will be applied according to the manufacturer's recommendations. • Fertilizers: Fertilizers will be applied only in the minimum amounts as recommended by the manufacturer. Once applied, the fertilizer will be worked into the soil to limit the exposure to stormwater. • Paints: All containers will be tightly sealed and stored when not required for use. Excess paint will not be discharged into the storm sewer system, but will be properly disposed of in accordance with local regulations. Practices for storage and disposal of hazardous materials or toxic waste • All hazardous materials like oil, gasoline and paint must be properly stored. To prevent spills and leaks, secondary containment is necessary for hazardous materials. • A leak proof containment facility shall be used for fuel storage tanks to prevent any leakage from infiltrating the ground. • An effort will be made to store only enough products to do the required job. • All materials stored on site will be stored in a neat and orderly manner. • All products will be kept in their original container, with the original labels still attached, unless they are not re -sealable. • Substances will not be mixed with one another unless recommended by the manufacturer. • Whenever possible all of a product will be used up before disposing of a container. • Manufacturers' recommendations for proper disposal will be followed. The site superintendent will routinely inspect the site to ensure proper disposal of all on site materials Collection storage and disposal of solid waste in compliance with Minn. R. ch. 7035 • Solid Waste - All trash and construction debris from the site will be collected and deposited in a dumpster. A dumpster will be required for each new home constructed. The dumpsters shall be emptied as necessary. No construction materials shall be buried on site. All solid waste must be disposed of in accordance with the MPCA disposal requirements (Part IV.F.1) Management of portable toilets to prevent tipping and disposal of sanitary wastes in accordance with Minn. R. ch. 7040: • Portable on-site sanitary and septic waste shall adequately be provided, positioned securely and maintained throughout the duration of the project. • All sanitary sewer waste will be collected from the portable units as required by state and local regulations. Spill prevention and response for fueling and equipment or vehicle maintenance: Spill Control Practices - • All spills will be cleaned up immediately after discovery, in accordance with the manufacturer's recommended methods. • Thespill area will be kept well ventilated. • Spills of toxic or hazardous materials must be reported to the Minnesota Duty Officer 1-800-422-0798. • A log of the spill type, location, date, and time will be created by the job superintendent. The spill prevention plan will be adjusted to include measures to prevent this type of spill from reoccurring. Containment and disposal of vehicle and equipment wash water and prohibiting engine decreasing on the site: • A defined and limited area of the site shall be used for external washing of construction vehicles. Washing runoff shall be contained and disposed of in accordance with MPCA. No engine degreasing allowed on-site. Storage and disposal of concrete and other washout wastes so that wastes do not contact the ground: • A leak proof containment facility shall be used for all liquid and solid wastes generated by concrete washout operations. Liquid and solid wastes shall not come in contact with the ground and must be disposed of in accordance with the MPCA. 9. Final Stabilization Method of Final Stabilization Upon final grading of any given portion of the site, final stabilization must be implemented within 7 days of completion. a. Stabilization of all exposed areas must be initiated immediately to limit soil erosion but in no case later than seven (7) days after the construction activity in that portion of the site has temporarily or permanently ceased. Once grading is complete, temporary erosion BMPs shall be installed immediately (ie. bio -rolls, erosion blanket, ditch checks, etc). No later than seven (7) days from completion of grading, the permanent stabilization should be in place. b. Temporary sediment basin requirements described in Section must be used for common drainage locations that serve an area with five (5) or more acres disturbed at one time. This project is being mass graded and constructed in 2 phases. The permanent dry sediment basins shall be constructed first and all on-site drainage shall be routed to the ponds. The site does not have any concentrated swales that will directly discharge off-site Procedures for completing final stabilization: • Final stabilization includes but is not limited to: seed & mulch as described above, Erosion blanket, bio -rolls, sod, and after grading silt fence. All perimeter and down gradient silt fence shall be inspected and repaired as necessary. Additional Final Stabilization Notes Final Stabilization is not complete until all requirements in Section 13 are complete: 1. All soil disturbing activities at the site have been completed and all soils are stabilized by a uniform perennial vegetative cover with a density of 70 percent of its expected final growth density over the entire pervious surface area, or other equivalent means necessary to prevent soil failure under erosive conditions. 2. The permanent stormwater management system is constructed, meets all requirements in Section 15 and is operating as designed. Temporary or permanent sedimentation basins that are to be used as permanent water quality management basins have been cleaned of any accumulated sediment. All sediment has been removed from conveyance systems and ditches are stabilized with permanent cover. 3. All temporary synthetic and structural erosion prevention and sediment control BMPs (such as silt fence) have been removed on the portions of the site for which the Permittee(s) is/are responsible. BMPs designed to decompose on site (such as some compost logs) may be left in place. 4. For residential construction only, individual lots are considered finally stabilized if the structure(s) are finished and temporary erosion protection and downgradient perimeter control has been completed and the residence has been sold to the homeowner. Additionally, the Permittee has distributed the MPCA's "Homeowner Fact Sheet" to the homeowner to inform the homeowner of the need for, and benefits of, permanent cover. 10 Steps to Stormwater Pollution Prevention on Small Residential Construction Sites Stormwater management on small residential construction sites need not be complicated. BY 0tDesignate Waste Disposal Areas Clearly identify separate waste disposal tiros on site for hazardous waste, construction wa, and domestic waste by designating with stormwater Post Your N01 and Keep an Up -to -Date OProtect Any Areas Reserved for Vegetation or Infiltration and Preserve Existing Trees O Copy of Your SWPPP on Site Y you will be installing infiltration -based features such as tin gardens or bioswales, make ;ore these areas are designated as off limits to avoid compaction. Install Perimeter-� © Controls on F41% ` Post a sign or other notice of your Permit coverage, inclyding your NPDIES cracking number and site Save true and money by preserving existing mature trees during;onstructum. Preserving mature trees minimizes the amount of soil that needs'.o be stabilized once ©nslruclion is complete, and minimizes the amount of rundf during and afteressible, contact Information. Also, keep a copy of your complete and up-to-date SWPPP on site and easily including site maps showing where each BMP is or will be installed, construction activity. ©Stockpile Your Soil � I IPA's CGP requires operators to preserve native topsoil on sire unless infeasble and protect all soil storage piles from run-on and runoft For smaller `!i",:;:.� stormwater stockples, covering the entire pile with a tarp may be sufficient. IION "Ic © Protect Construction Materials from Run -On and Runoff � © At the end of every workday and during precipitation events, provide cover or materials that could leach pollutants. BY 0tDesignate Waste Disposal Areas Clearly identify separate waste disposal tiros on site for hazardous waste, construction wa, and domestic waste by designating with stormwater a signage, and protect from run-on t i flow and runoff.t'110\r Install Perimeter-� © Controls on F41% ` O Downhill Lot Une \ \ ` [nstallperimeter controls such as sediment filter logs or silt fences i arounl the downhill boundaries of your site. _ hstall Inlet Controls O' Sediment control logs, gravel barriers, and / ; sand a rock bags are options for effective inlet controls. Make rare to remove accumulated sediment whenever it has reached halfway up the control. OInstall a Concrete/Stucco WashoutBasin DRAWN BY Designate a leak -proof basin lined with plastic for washing cut used MJV -- concrde and stucco containers. Never wash excess stucco or concrete residue --------------- down s storm drain or into a stream! \� OMaintain a Stabilized Exit Pad AMA DULY REGISTERED PROFESSIONAL ENGINEER UNDER THE LAWS OF THE STATE OF MINNESOTA. minimize sediment track -out from vehicles exiting your siteby maintaining an exit SAT H RE -B E RG Q U I ST INC. pad nude of crushed rock spread over geotextile fabric. If sediment rack -mat occurs. remove deposied sediment by the end of the same work day. LrJ O ' stormwater SSite Stabilization Immediately stabilize exposed portions of the site whenever construction work will slop for 14 or more days, even if work is only temporarily stopped. Remember, final stabilization is required prior to terminating permit coverage. DRAWING NAME NO. BY DATE REVISIONS USE (INCLUDING COPYING, DISTRIBUTION, AND/OR CONVEYANCE OF I HEREBY CERTIFY THAT THIS PLAN OR SPECIFICATION WAS so CITY PROJECT NO. FILE NO. SHEETS GRADING 01 _MJV 07/2_9/2_0 _ _ _ _ _LA_YO_UT_REVISIONS _ INFORMATION) OF THIS PRODUCT IS STRICTLY PROHIBITED WITHOUT PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I SERs R` 2020-12 SWPPP 3120-079 DRAWN BY 02 — MJV -- 08/27/20 --- --------------- RPBCWD COMMENTS — SATHRE-BERGOUIST, INC.'s EXPRESS WRITTEN AUTHORIZATION. USE WITHOUT SAID AUTHORIZATION CONSTITUTES AN ILLEGITIMATE USE AND SHALL THEREBY AMA DULY REGISTERED PROFESSIONAL ENGINEER UNDER THE LAWS OF THE STATE OF MINNESOTA. �� mo w SAT H RE -B E RG Q U I ST INC. TCW 03 MJV 09/04/20 CITY COMMENTS INDEMNIFY SATHRE-BERGOUIST, INC. OF ALL RESPONSIBILITY. N CHANHASSEN, THE BLUFFS AT LAKE LUCY SWP CHECKED BY 04 MJV 09/14/20 _ _ _ CITY COMMENTS _ — SATHRE-BERGOUIST, INC. RESERVES THE RIGHT TO HOLD ANY ILLEGITIMATE 150 SOUTH BROADWAY WAYZATA, MN. 55391 (952) 47G6000 RSM DATE O5 MJV 09/23/20 _ _ _CIN &RPB— — — —io MENTS &_RPBCW_D COMMENTS_ — USER OR PARTY LEGALLY RESPONSIBLE FOR DAMAGES OR LOSSES RESULTING ROBERT S. M LSTAD, P.E. s tv� �.yF MINNESOTA C HAN THREE DEVELOPMENT, INC. L+t /t /P 06 _MJV 09/2_9/2_0 _ _ _CITY _ _ FROM ILLEGITMATE USE. / Date: 07 08 ZO Lic. No. ZPy�-8 P�`' RS P� S 07/08/20 07 MJV 10/05/20 CITY & MCES COMMENTS map of waters witin 1 mile of the site o smliirraw^ Rd O Vighway 7 1 L x �rY r rrv.r lk"�r i w Bidgerc +, t Shorewood Park syF o U i JSP ff : yr�fl rl J FrrTsn s -- �Pali1 Christmas i+, tj to t tY t= L4 %vk I i9� 71 Row Ider f Jr - W Idi - 5' Park _oyy,, C. {yre.ak P'arY A n. `6vip u y e LIQ W5IC T1e- 4 _ {�49 7 1P ++HFFtI EPI C 1�1; ?Z Townaniz RU" 1074RVCR ; _A 7.1 r.IN ! - Z,—Ild: afFr - may, PF v_dr AA �' ... `. >•y1k11r Forth , �*p L t1r y REJA YEAa C. 31!'.. .71 x �Pert M n ne wa s hk a I wrr rc1i7 MMirl4Wa.h �µL}}''`� - Kin*fA Rd r. Pogwnal pa b q` rx -' G' Lucy tiY ca 4 g crmre Cr, W c � �,� r11frL fr �1 I•� G � 4 xSOW as n N 11111 :. 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SHEETS GRADING _01 MJV 07/2_9/2_0 LAYOUT REVISIONS _ INFORMATION) OF THIS PRODUCT IS STRICTLY PROHIBITED WITHOUT PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT 1 EERs 2020-12 S W P P P 3120-079 DRAWN BY 02 - MJV -- 08/27/20 --- --------------- RPBCWD COMMENTS -SAID SATHRE-BERGQUIST, INC.'s EXPRESS WRITTEN AUTHORIZATION. USE WITHOUT AUTHORIZATION CONSTITUTES AN ILLEGITIMATE USE AND SHALL THEREBY AMA DULY REGISTERED PROFESSIONAL ENGINEER UNDER THE LAWS OF THE STATE OF MINNESOTA. w SAT H RE-BERGQUIST INC. TCW 03 MJV 09/14/20 CITY COMMENTS NDEMNIFYSATHRE-BERGQUISE INC. OFA LLRESPONSIBILITY. N CHANHASSEN, THE BLUFFS AT LAKE LUCY 04 MJV 09/14/20 _ _ _ CITY COMMENTS INC. RESERVES THE RIGHT TO HOLD ANY ILLEGITIMATE ,_/o- S. /�/.��j ,,,{150 SOUTH BROADWAY WAYZATA, MN. 55391 (952)476-6000CHECKEDBY MJV09/23/20 MJV _ _ _CITY& RPBCWD COMMENTS _- COMMENTS USERSATHRE-BERGOUIST, USER OR PARTY LEGALLY RESPONSIBLE FOR DAMAGES OR LOSSES RESULTING ROBERT S. M LSTAD, P.E. �"� �.yF MINNESOTARSM C HAN THREE G E V E LO P M E NT, INC.DATE 7'swP 06 O6 09/29/20 CIN&RPBCWD _ _ FROM ILLEGITMATE USE. / Date: 07 08 L Lic. No. ZPy�-8 p�'`' RS v� 07/08/20 07 MJV 10/05/20 CITY & MCES COMMENTS