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2024-0131 Chanhassen Aptmts - Full SWPPPSTORMWATER POLLUTION PREVENTION PLAN Market Blvd. & W 78th St. 591 W 78th St. Chanhassen, MN 55317 Kimley-Horn No: 160384004 Date:01/31/2024 Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-1 POLLUTION PREVENTION PLAN CERTIFICATION I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Signed:________________________________________ Date:_01/31/2024_____________________ Michael C. Brandt, P.E. MN LIC. NO. 462661 MnDOT Design of SWPPP Certified Expires May 2024 Kimley-Horn and Associates, Inc. Michael C. Brandt, P.E. 767 N Eustis St Ste 100 St. Paul, MN 55114 651-643-0428 Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-2 Table of Contents 1.0 Storm Water Pollution Prevention Plan………………………………………………….4 Appendices …………………………………………………………………………………………………..21 Appendix 1 Impaired Waterway Map…………….…………………………………………………………………..21 Appendix 2 SWPPP Drawing and Detail Sheets…………………………………………………………………..23 Appendix 2 USGS Soil Map…………………………………………………………………………………………………28 Appendix 3 Soil Borings……………………………………………………………………………………………………..32 Appendix 4 NPDES General Stormwater Permit for Construction Activity (MNR100001)…….71 Appendix 5 MPCA & EPA Concrete Washout Guidance………………………………………………………92 Appendix 6 USGS 7.5 Minute Quad Map……………………………………………………………………………97 Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-3 1.0 Storm Water Pollution Prevention Plan The Storm Water Pollution Prevention Plan (SWPPP) includes: ·The Erosion and Sediment Control drawing sheets ·The Erosion and Sediment Control detail sheets ·The Erosion and Sediment Control onsite manual and amendment log ·The national pollutant discharge elimination system general storm water permit for construction activity (MNR100001) ·MPCA & EPA concrete washout guidance The SWPPP must remain onsite and maintained/updated throughout the project. GENERAL SITE DESCRIPTION PROJECT NAME Market Blvd. & W 78th St. PROJECT LOCATION 591 W 78th St, Chanhassen, MN 55317 OWNER NAME Roers Companies OWNER ADDRESS 2 Carlson Parkway, Suite 400, Plymouth, MN 55447 CONTRACTOR NAME TBD CONTRACTOR ADDRESS TBD MPCA ADDRESS Minnesota Pollution Control Agency Construction Stormwater Permit Program 520 Lafayette Road North St. Paul, MN 55155-4194 Phone: (800) 657-3864 WATER MANAGEMENT Riley Purgatory Bluff Creek Watershed 18681 Lake Drive East Chanhassen, MN 55317 Phone: (952) 607-6512 City of Chanhassen 7700 Market Boulevard P.O. Box 147 Chanhassen, MN 55317 Joe Seidl, Water Resources Engineer (952) 227-1168 Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-4 CONTRACTOR EROSION CONTROL SUPERVISOR 24 HOUR/ DAY CONTACT INFORMATION TBD GEOTECHNICAL INFORMATION A Geotechnical Evaluation Report, Braun Intertec Corporation (Braun), Project Number: B2307983, has been provided by Braun dated October 18, 2023. The site’s soil profile generally consists of pavement over topsoil, fill, and glacial deposits. The soil is comprised of silty sands, clayey sands, poorly graded sands, lean clays, and silts. Groundwater was found in three borings ranging from 3 to 35 feet below grade. However, a boring in native sands did not contain groundwater, so it was determined that the groundwater in the three borings to be perched groundwater and the borings for the site did not penetrate the groundwater surface. Seasonal and annual fluctuations of groundwater and perched groundwater conditions should be expected. A chemical odor was detected in one of the boring during the geotechnical evaluation. Furthermore, a Phase II Environmental Site Assessment (ESA) was provided by Braun dated December 12, 2023. Soil samples taken during the Phase II ESA indicate contaminated soils in the northeast portion of the site located near past off-site petroleum release. Additionally, soil vapor samples identified benzene concentrations above the 33X Residential ISVs. ITEMS INCLUDED IN THIS SWPPP ·Demolition, Erosion Control, Construction Detail Plan Sheets ·Onsite Manual and Amendment Log ·The National Pollutant Discharge Elimination System General Storm Water Permit for Construction Activity (MNR100001) ·MNPCA and EPA Concrete Washout Guidance ·USGS 7.5 Minute Quad Map CONSTRUCTION ACTIVITY INFORMATION PROJECT TYPE The project consists of redeveloping a 4.09 acre site. The proposed development consists of two multifamily buildings with underground parking (66,721 SF and 39,221 SF), future city street, parking lots, amenity space, utilities, site grading, tree trenches, and an underground stormwater system to manage runoff from the site. PROJECT AREA Total Disturbed Area =5.57 AC Existing Impervious Surface Area within Limits of Disturbance = 3.36 AC Proposed Impervious Surface Area within Limits of Disturbance = 3.66 AC RECEIVING WATERS The site discharges to two discharge points. The first discharge point is an existing public storm sewer system in Market Boulevard. Onsite stormwater reaches the via an onsite storm sewer system and catch basins along Market Boulevard and W 78th Street. The public storm sewer flows south along Market Boulevard until it is discharged into a regional stormwater basin approximately 0.1 miles south of the site. The second discharge point is a public storm sewer system in the alley that separates the project site and the neighboring property to the east. Site runoff enters this stormwater system via a series of catch basins. The stormwater system proceeds south to Market Street where it then travels west and empties into the Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-5 same regional stormwater basin as the first discharge point. From the regional stormwater basin, stormwater flows south east via a series of stormwater pipes and wetland complexes to Rice Marsh Lake approximately 0.86 miles south-east of the site. CALCAREOUS FENS This project does not drain to any known calcareous fens. SPECIAL OR IMPAIRED WATERS Susan Lake is located 0.59 miles South-West of the site and is impaired for mercury in fish tissue and nutrients. Lotus Lake is located 0.68 miles North-East of the site and is impaired for fish bioassessments, mercury in fish tissue, and nutrients. Rice Marsh Lake is located 0.86 miles South-East of the site and is impaired for nutrients. Of the three impaired bodies within one mile of the site discharge point, Rice Marsh Lake is the only one that receives drainage from the site. Nutrients and fish bioassessments are considered construction related. DESCRIPTION OF EXISTING SITE CONDITIONS The existing project area is 82.1% impervious. An existing hotel and cinema and associated parking lots cover most of the existing lot. Green spaces are intermingled between the building and parking areas. The existing site surface drains to a series of catch basins and storm sewer piping, which flow to the City’s storm sewer systems in the adjacent streets. Existing slopes on the site range from 1% to 5.5%. DESCRIPTION OF PROPOSED CONSTRUCTION ACTIVITIES The proposed development two multifamily buildings with underground parking (west building:66,721 SF and east building: 39,221 SF), a future city street, and parking lot. The proposed work will also include grading, bituminous and concrete surfaces, utilities, landscaping, tree trenches, ADS bay filters and underground stormwater management. The total disturbed area is 5.57 acres. The project adds 0.3 acres of impervious surface to the existing site, for a total of 3.66 acres. The future city street drains to an underground BMP. This underground BMP will drain to a second underground BMP in the parking lot north of the proposed east building. This second BMP also captures drainage from both proposed buildings and most of the proposed parking lot north of the east building. This BMP discharges to an existing storm sewer in the ally between the proposed east building and the neighboring property to the east. Onsite drainage to the west of the west building is routed to two tree trenches before being routed underground to an existing catch basin in Market Boulevard. Onsite drainage to the south and east of the east building are collected by a series of catch basins before being sent to two ADS bay filters. From the filters, the storm water discharges into the existing storm sewer east of the site. PERMANENT STORMWATER MANAGEMENT The project proposes the construction of an onsite storm water collection system two onsite underground BMPs, two tree trenches, and two ADS bay filters. To align with Riley Purgatory Bluff Creek Watershed (RPBCWD) Rules J 3.a.i and J 3.1a.ii and City of Chanhassen Rule 19-144 (a)(1)(d), the site’s proposed BMPs control peak runoff rates for the 1-year, 2-year, 10-year, and 100-year 24-hour rainfall events and the 10-day snowmelt events at or below the existing condition runoff rates. To meet RPBCWD Rule 3.1.c, the site’s proposed BMP’s remove at least 60% of the annual total phosphorus (TP) and at least 90% annual total suspended solids (TSS) Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-6 from the site runoff and TSS nor TP loading exceed existing conditions. According to RPBCWD Rule J 3.1b, abstractions of 1.1 inch from regulated impervious surfaces. However, according to Rule 3.3a a restricted site needs to meet a 0.55 inches of abstraction. Boring logs onsite indicate contaminated soils, making the site a restricted site according to Rule3.3. Furthermore, if rule 3.3a cannot be met, Rule 3.3b applies. Rule 3.3b requires the abstraction to the maximum extent possible. The project does not meet the volume reduction requirements but utilizes two tree trenches, re-use of storm water for irrigation, and a green roof to the maximum extent possible to comply with the watershed rule. ESTIMATED EROSION AND SEDIMENT CONTROL QUANTITIES ·Silt Fence: ±1,355LF ·Silt Dike: ±1,250 LF ·Inlet Protection: 31 EA ·Construction Entrance: 1 EA SEQUENCE OF MAJOR CONSTRUCTION ACTIVITIES SEQUENCE OF MAJOR CONSTRUCTION ACTIVITIES PHASE I 1.Install inlet protection 2.Install stabilized construction exit 3.Install temporary construction fence and silt fence (clear only those areas necessary to install silt fence) 4.Install temporary sediment basins and/or traps and temporary ditches as needed 5.Begin demolition and clearing and grubbing the site 6.Begin rough grading the site PHASE II 7.Temporarily seed, throughout construction, denuded areas that will be inactive for 7 days or more. 8.Install utilities, underdrains, storm sewers, underground system, curb and gutters. 9.Install appropriate inlet protection at all storm sewer structures as each inlet structure is installed. 10.Permanently stabilize areas to be vegetated as they are brought to final grade. 11.Prepare site for paving. 12.Pave site and install striping. 13.Install appropriate inlet protection devices for paved areas as work progresses. 14.Complete grading and installation of permanent stabilization over all areas. 15.Obtain concurrence with the civil engineering consultant that the site has been fully stabilized then remove all remaining temporary erosion and sediment control devices, and stabilize any areas disturbed by the removal of BMPs. Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-7 EROSION CONTROL AND DETAIL SHEETS C200 –Site Demolition Plan C300 – Erosion Control Plan-Phase 1 C301 – Erosion Control Plan-Phase 2 C302 – Erosion Control Details INSPECTIONS AND MAINTENANCE EROSION CONTROL SUPERVISOR (Mn/DOT 2573) EROSION CONTROL SUPERVISOR (Mn/DOT 2573) The contractor shall assign an erosion control supervisor for the project who shall be responsible for compliance with the project SWPPP. The erosion control supervisor (ECS) shall comply with the most current addition of the Minnesota Department of Transportation Standard Specification for construction for all applicable section. The ECS Shall: A.Implement the SWPPP Plan B.Oversee maintenance practices identified in the SWPPP C.Conduct or provide for inspection and monitoring activities D.Inspect site and begin corrective actions to deficient BMP’s no later than 24 hours after a rainfall event. E.Prepare weekly schedule of erosion activities (MnDOT 1717.2D) F.Prepare and update the contractor’s erosion/sediment control site plan as necessary (MnDOT1717.2E) G.Identify other potential pollutant sources and make sure remedies are added to the SWPPP H.Identify any deficiencies in the SWPPP and identify best management practices (BMPs) to address the deficiencies and assure they are added to the SWPPP. I.If changes in construction documents are not addressed in the SWPPP, then the ECS shall amend the SWPPP to include the changes. CONTRACTOR’S EROSION/SEDIMENT CONTROL SITE PLAN The Contractor shall submit a Contractor’s Erosion / Sediment Control Site Plan to the Engineer a minimum of 24 hours prior to the first pre-construction meeting. The Contractor’s Erosion / Sediment Control Site Plan shall include: 1.The name of the Contractor’s designated Erosion Control Supervisor with 24-hour contact information. (i.e. phone number, email, etc.) 2.Name and contact information for the individual(s) responsible for performing and maintaining the site inspection logs on a weekly basis (or within 24 hours of 0.5 inches of a rain in a 24-hour period). 3.Name and contact information of the individual(s) responsible for temporary and permanent stabilization. 4.Name and contact information of the individual(s) who will be responsible for emergency repairs and replacements. Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-8 5.Location where the SWPPP document and NPDES permit will be kept on- site. The document should be accessible at all times and available in the time of essence. 6.Where and how concrete washout will occur and be in compliance of the Minnesota Pollution Control Agency’s (MPCA) memorandum “Concrete Washout Guidance”. 7.Location of stockpiles of native soils and/or borrow materials Indicate how stockpiles will be kept in compliance with NPDES and MPCA requirements. 8.Location of any temporary sediment basins and traps. The contactor will not be allowed to start work until the Engineer has reviewed and accepted the Contractor’s Erosion / Sediment Control Site Plan. INSPECTION AND MAINTENANCE PRACTICES A.All control measures shall be inspected at least once each week and within 24 hours on the end of a storm event resulting in 0.5 inches or greater within a 24-hour period. The inspection shall be completed by the ECS. B.All measures shall be maintained in good working order; if a repair is necessary, it shall be initiated within 24 hours of report. C.Silt fence shall be inspected for depth of sediment, tears, fabric attachment to posts, and that posts and fabric bottom are firmly in the ground. D.Built up sediment shall be removed from silt fence when it has reached one third the height of the fence or sooner. E.Inlet protection devices shall be inspected for depth of sediment, absence of tears and to assure that the devices are securely in place. CONSTRUCTION NOTES A.Prior to commencement of construction activities in any area of the project, down gradient erosion and sediment control measures and concrete barriers delineating the construction limits shall be installed and inspected by the ECS and the engineer. B.The contractor is responsible for providing all erosion and sediment control measures as required by the MPCA’s NPDES permit for construction. This includes any additional erosion and sediment controls beyond what is shown on the plan. C.Phased construction shall be used to minimize sediment transport. D.The maximum time any area can remain open while NOT being worked is 7 days. Fertilizer should be distributed at a rate of 250 lbs/acre. E.If down gradient BMPs are overloaded during a storm event, additional up gradient BMPs are required to eliminate the overload. The additional BMPs must be recorded on this SWPPP in the amendments to SWPPP section. F.Temporary stockpiles must have silt fence or other effective sediment controls, and cannot be placed in surface waters including storm water conveyances such as curb and gutter systems, or conduits and ditches. All stockpiles shall be covered or stabilized to limit wind erosion. G.A construction entrance shall be constructed for the project. A vehicle tracking pad shall be installed in accordance with the construction plan at Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-9 every project entrance. Entrances must be inspected and maintained to ensure proper function. H.The contractor shall clean all tracked materials using a street sweeper with a pick-up broom on adjacent roadways on a daily basis and as directed by the engineer. I.Concrete washout shall be done in accordance with the MPCA and the EPA concrete washout guidance. CONTROLS PERIMETER/SEDIMENT CONTROLS A construction exit/entrance shall be incorporated into the project. All construction traffic shall utilize the construction exist such that track out of sediment is minimized in accordance with the General Permit. Any sediment track- out must be removed through street sweeping as soon as possible and no later than 24 hours of the occurrence. Silt fence shall be installed around the perimeter of the site where indicated. Biorolls shall be installed around the perimeter of the site where silt fence cannot be installed. Inlet protection will also be required on all existing and proposed storm sewer catch basins and maintained throughout construction. STABILIZATION PRACTICES Vegetative cover or temporary erosion control devices, such as seeding, mulching, erosion control blanket, etc. will be required on all exposed soils as soon as construction stops within an area and no later than 7 days after the last construction activity. Stockpiles will be kept in an orderly fashion in an area designated by the Erosion Control Supervisor on the Contractor’s Erosion / Sediment Control Site Plan. The stockpiles must have perimeter control and temporary stabilization as required by the MPCA General Permit. Permanent stabilization includes, placement of curb and gutter, mulch, sod, seed, and pavement according to the construction drawings. Any removals shall be limited to that which is required and in an order that is consistent with the removal and construction sequence. Temporary seeding shall be performed with seed mix Winter Wheat One Year Cover Crop at 100 lb/acre (per Minnesota Stormwater Manual). Temporary seeding shall include disk anchored mulch on all slopes > 200’ or > 5%. Permanent cover specifies 4” min. topsoil, seed mix indicated on Landscape plan and disk anchored mulch; or 4” min. topsoil and sod. Slopes steeper than 4:1 and 4:1 slopes longer than 30’ shall be seeded and protected with erosion control blanket or sodded and staked. Blanket category specified per Mn/DOT 3885.1. Plan depicts required blanket locations. Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-10 Slopes steeper than 4:1 are stable from land-sliding and surface erosion. No slopes shall be steeper than 3:1 unless indicated on the plans or Geotechnical Report. For sites where temporary or permanent cover will not be complete by November 15, adequate measures shall be implemented to control spring erosion and sedimentation. These controls may include, but are not limited to: erosion control blanket, tarpaulin stockpile cover, additional silt fence, etc. The Erosion Control Supervisor shall identify the appropriate BMP based on site conditions and ensure they are implemented by November 15. OTHER CONTROLS WASTE MATERIALS All waste materials will be collected and stored in metal dumpsters. Dumpsters will be emptied as needed and the waste will be hauled offsite and disposed of properly. HAZARDOUS WASTE MATERIALS All hazardous waste materials shall be stored and disposed of in the manner specified by local or state regulation in compliance with Minn. R. ch. 7045. Materials with the potential to leach shall be stored under cover (e.g. plastic sheeting or temporary roofs.) Materials shall be stored in a restricted access storage area to prevent vandalism. The Contractor's personnel shall be instructed in these practices and the Contractor's Erosion Control Supervisor shall be responsible for seeing that these practices are followed. SANITARY WASTE All sanitary waste shall be collected from the portable units as required by local regulation in compliance with Minn. R. ch. 7041. OFF-SITE VEHICLE TRACKING Paved streets adjacent to the project site shall be kept clean of debris. Streets shall be swept with a pick-up broom as necessary or as directed by the City. Dump trucks hauling material to and from the construction area shall be covered with a tarpaulin. All vehicles exiting the Site shall be guided and required to go through the construction entrance. DEWATERING AND BASIN DRAINING When dewatering manholes or construction areas, water shall be pumped to temporary sedimentation basins or containers that allow for proper treatment prior to discharging to surface waters. If dewatering is necessary, it is the contractor’s responsibility to obtain a Minnesota DNR Water Appropriation permit for construction dewatering operations. Contaminated water shall not be pumped to turfed areas or the storm sewer and be properly disposed of. Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-11 VEHICLE FUELING & MAINTENANCE Whenever possible, vehicle refueling, and maintenance should not be performed on the construction site. However, any vehicle refueling or maintenance that must take place on the construction site must have proper spill prevention controls in place prior to commencing work. Any fuel spills must be reported and cleaned immediately. DUST CONTROL Dust resulting from the Contractor’s work either inside or outside the right of way, shall be controlled by the Contractor by applying either water or dust palliative, or both. TIMING OF CONTROL MEASURES The following control measures will be coordinated with construction activities: ·Storm sewer inlet protection devices shall be installed prior to any soil disturbance and shall remain in place until permanent stabilization has taken place. ·Clearing, grading and pavement removal will not occur in an area until it is necessary for construction to proceed. ·Erosion and Sediment Control devices will be satisfactorily maintained until the construction is completed and the potential for erosion has passed. ·Dust control shall be applied when necessary or as directed by the Engineer. CERTIFICATION OF COMPLIANCE WITH FEDERAL, STATE AND LOCAL REGULATIONS The storm water pollution prevention plan reflects Minnesota Pollution Control Agency guidelines for storm water management and erosion and sediment control during construction activities. The storm water pollution prevention plan has been prepared in accordance with the provisions of the National Pollution Discharge Elimination System permit. MAINTENANCE AND INSPECTION RECORDS The owner and contractor shall be responsible for the following inspection and maintenance practices to maintain erosion and sediment controls. ·All control measures will be inspected at least once each week and within 24 hours of the end of a storm event of 0.5 inches or greater in 24 hours. The inspection will be completed by the Erosion Control Supervisor. ·All measures will be maintained in good working order; if a repair is necessary, it will be initiated within 24 hours of report. ·Inlet protection devices will be inspected for depth of sediment and free of any tears. Devices shall be inspected to ensure they are securely in place. Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-12 INVENTORY FOR POLLUTION PREVENTION PLAN Pollutants that result from clearing, grading, excavation, and building materials and have the potential to be present in storm water runoff are as follows: Concrete, asphalt, cleaning solvents, paints, petroleum based products, fertilizers, wood and solid wastes. SPILL PREVENTION GOOD HOUSEKEEPING The following good housekeeping practices will be followed onsite during the construction project. ·An effort will be made to store only enough products required to do the job. ·All materials stored onsite will be stored in a neat, orderly manner in their appropriate containers and, if possible, under a roof or other enclosure with secondary containment. Pesticides, herbicides, insecticides, fertilizers, treatment chemicals, and landscape materials must be placed under cover. ·Products will be kept in their original containers with the original manufacturer's label. ·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 the container. ·Manufacturers' recommendations for proper use and disposal will be followed. ·The Contractor's site superintendent will inspect daily to ensure proper use and disposal of materials onsite. HAZARDOUS PRODUCTS These practices are used to reduce the risks associated with hazardous materials. ·Products will be kept in their original containers unless it cannot be resealed. ·Original labels and Material Safety Data Sheets will be retained on site and accessible at all times; they contain important product and safety information. ·If surplus product must be disposed of, manufacturers' or local and State recommended methods for proper disposal will be followed. In addition to the good housekeeping and material management practices discussed in the previous sections of this plan, the following practices will be followed for spill prevention and cleanup: ·Manufacturers' recommended methods for spill cleanup will be clearly posted and site personnel will be made aware of the procedures and the location of the information and cleanup supplies. Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-13 SPILL CONTROL PRACTICES SPILL CONTROL PRACTICES ·Materials and equipment necessary for spill cleanup will be kept in a material storage area located onsite. Equipment and materials will include but not be limited to brooms, dust pans, mops, rags, gloves, goggles, cat litter, sand, sawdust, and plastic and metal trash containers specifically for this purpose. ·All spills will be cleaned up immediately after discovery. ·The spill area will be kept well ventilated and personnel will wear appropriate protective clothing to prevent injury from contact with a hazardous substance. ·Spills of toxic or hazardous material will be reported to the appropriate state or local government agency, regardless of the size. In addition to reporting to local authorities, report spills to the Minnesota Pollution Control Agency (State Duty Officer: 800-422-0798 or 651-297-8610). Any spills above the reportable quantities limits in the Code of Federal Regulations (CFR), Title 40, Part 302 shall be reported to the EPA National Response Center (800-424-8802). The report will include measures to prevent spills from reoccurring and information regarding how to remediate spills if a similar occurrence happens. A description of the spill, what caused it, and the cleanup measures will also be included. ·The Contractor's Erosion Control Supervisor shall be the Spill Prevention and Cleanup Coordinator. ·Spills will be studied to understand why they occurred and preventive methods will be created to ensure similar spills do not occur in the future. PRODUCT SPECIFIC PRACTICES PETROLEUM PRODUCTS All on site vehicles will be monitored for leaks and receive regular preventive maintenance to reduce the chance of leakage. Petroleum products will be stored in tightly sealed containers which are clearly labeled. Any asphalt based materials used on site will be applied and stored according to the manufacturer's recommendations. Any spilled petroleum products of 5 gallons or more shall be reported to the Minnesota Pollution Control Agency at 651-297-8610. PAINTS AND CLEANING SOLVENTS All containers will be tightly sealed and stored when not required for use. Excess paint and solutions will not be discharged to the storm sewer system but will be properly disposed of according to manufacturers' instructions or State and local regulations. CONCRETE AND CONCRETE TRUCKS Concrete, concrete tools and trucks all must wash out in a designated area. The designated area must be clearly identified on the site and communicated to all personnel involved with cast-in-place concrete as the washout area. This designated area must meet the MPCA and EPA regulations of a defined concrete washout area. The following three options are considered an approved method: 1.Keeping all concrete washout self-contained and returned to an industrial site to be disposed of in a MPCA approved manner. 2.Providing a prefabricated concrete washout container that all concrete washout can be collected in. These containers should be maintained on a regular basis. Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-14 3.Creating a self-installed washout facility with an impermeable liner. An engineered clay liner will be considered an impermeable liner. For additional information on concrete washout regulations, please see the MPCA’s memorandum “Concrete Washout Guidance” and the EPA “Stormwater Best Management Practices Concrete Washout” (Attached). VEHICLE AND EQUIPMENT WASHING If vehicles or equipment are washed on the project site it must be done in a designated area. The designated area must be clearly identified on the site and communicated to all personnel involved. Runoff from the washing area must be contained in a sediment basin or other similar control method and must be properly disposed of. Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-15 Contractors Certification I certify under penalty of law that I understand the terms and conditions of the general National Pollution Discharge Elimination System (NPDES) permit that authorizes the storm water discharges associated with industrial activity from the construction site identified as part of this certification. Signature Company , Address & Phone No.Responsible for: Signature Printed Name Title Date: Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-16 NOTES: Owner Certification I certify under penalty of law that I understand the terms and conditions of the general National Pollution Discharge Elimination System (NPDES) permit that authorizes the storm water discharges associated with industrial activity from the construction site identified as part of this certification. Signature Company , Address & Phone No.Responsible for: Signature Printed Name Title Date: Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-17 STABILIZATION MEASURES Date since last disturbance: Date of next disturbance: Stabilized (Yes/No): Stabilized with: Current Condition: NOTES: SWPPP INSPECTION AND MAINTENANCE REPORT FORM To be completed every 7 calendar days or within 24 hours of a rainfall event of 0.5 inches or within 24 hours. Inspector: Date: Day since late rainfall: Amount of last rainfall (inches): Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-18 OTHER CONTROLS STABILIZED CONSTRUCTION ENTRANCE How much sediment gets tracked onto the roadways? Is the gravel clean or is it filled with sediment/clay? Does all traffic use the stabilized entrance to leave the site? What maintenance is required to stabilize the construction entrance? PERIMETER STRUCTURAL CONTROLS Date: Has sediment reached 1/3 of the silt fence height? Is the silt/construction fence properly secured? Is there evidence of overtopping? NOTES: Market Blvd. & W 78th St. Chanhassen STORM WATER POLLUTION PREVENTION PLAN INSPECTION AND ONSITE AMENDMENT LOG Kimley-Horn and Associates, Inc.Storm Water Pollution Prevention Plan KHA Project No.160384004 SWPPP-19 INLET PROTECTION DEVICES Date: Are all inlet protection devices properly installed and still operating? Are all inlet protection devices cleaned and maintainable? Is there evidence of sediment escaping the devices and entering the storm sewer network? CHANGES TO THE SWPPP Changes required to the SWPPP: Reasons for changing the SWPPP? I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. SIGNED:______________________________________ DATE:_____________________ SWPPP WATERWAY MAP ONE-MILE RADIUS SITE LOCATION SWPPP Drawing and Detail Sheets RELOCATE COMMUNICATION LINE, COORDINATE WITH UTILITY PROVIDER. REMOVE BUILDING OVERHANG. REMOVE FLAGPOLE REMOVE GAS METER, COORDINATE WITH UTILITY PROVIDER. REMOVE GAS METER, COORDINATE WITH UTILITY PROVIDER. REMOVE GAS METER, COORDINATE WITH UTILITY PROVIDER. REMOVE TRANSFORMER, COORDINATE WITH UTILITY PROVIDER. REMOVE TRANSFORMERS, COORDINATE WITH UTILITY PROVIDER. REMOVE TRANSFORMERS, COORDINATE WITH UTILITY PROVIDER. PROTECT IN PLACE EXISTING TRAFFIC LIGHTS. PROTECT IN PLACE EXISTING STORM. REMOVE EXISTING RETAINING WALLS, COORDINATE WITH OWNER AND KA DEVELOPMENT. G G G G G G G PROTECT IN PLACE EXISTING POWER LINE. REMOVE TRANSFORMER, COORDINATE WITH UTILITY PROVIDER. B B B BB B B B B B B B C C C C C C C CC C C C D D D D D I I I I I I PROTECT IN PLACE EXISTING UTILITIES. REMOVE EXISTING RETAINING WALLS REMOVE EXISTING RETAINING WALLS H H TYP. TYP. F F TYP. TYP. E PROTECT IN PLACE EXISTING TRAFFIC LIGHT. PROTECT EXISTING SANITARY MANHOLEREMOVE EXISTING RETAINING WALL PROTECT IN PLACE EXISTING MANHOLE STRUCTURE, REMOVE EXISTING PIPE TO THE EAST AND PLUG STRUCTURE.A A A A A A A A A PROTECT IN PLACE EXISTING POWER LINE. PROTECT IN PLACE EXISTING STORM SEWER PROTECT IN PLACE EXISTING STORM SEWER REMOVE SANITARY SEWER SERVICE. J J J J K K K K K K K K KK K K K K K L L L L L M M N N N L L L O P P P P P Q Q Q Q Q R R RR B D WATERMAIN LOOP MUST BE KEPT INTACT UNTIL NEW LOOP LINE IS IN PLACE, COORDINATE WITH CITY PUBLIC WORKS AND KA DEVELOPMENT PROTECT IN PLACE EXISTING CATCH BASIN STRUCTURE, REMOVE EXISTING PIPE TO THE EAST AND PLUG STRUCTURE. CONTRACTOR TO PROTECT OFF-SITE PARKING SURFACES CONTRACTOR SHALL LIMIT DISTURBANCE OF ALDI WATER SUPPLY TO 2 HOURS AND COORDINATE OUTAGE WITH STORE MANAGER. CONTRACTOR TO COORDINATE WITH ALDI STORE MANAGER FOR ACCESS SHUT DOWN. WATERMAIN REMOVAL MUST BE COORDINATED WITH ALDI STORE MANAGER AND CANNOT BE REMOVED UNTIL NEW PIPE IS IN PLACE. M A A A A A A A A A A A A A A WATERMAIN LOOP MUST BE KEPT INTACT UNTIL NEW LOOP LINE IS IN PLACE, COORDINATE WITH CITY PUBLIC WORKS AND KA DEVELOPMENT CONTRACTOR TO COORDINATE WITH KA DEVELOPMENT FOR ACCESS SHUT DOWN. CONTRACTOR TO COORDINATE WITH AMERICANA COMMUNITY BANK FOR ACCESS SHUT DOWN. PROTECT IN PLACE EXISTING UTILITIES. CONTRACTOR SHALL LIMIT DISTURBANCE OF OLD NATIONAL BANK WATER SUPPLY TO 2 HOURS AND COORDINATE OUTAGE WITH BANK MANAGER. CONTRACTOR SHALL LIMIT DISTURBANCE OF OLD NATIONAL BANK WATER SUPPLY TO 2 HOURS AND COORDINATE OUTAGE WITH STORE MANAGER. R R R R R R R R R R R R PROTECT IN PLACE EXISTING UTILITIES. SALVAGE AND REINSTALL HYDRANT. SALVAGE AND REINSTALL SIGN. SALVAGE AND REINSTALL SIGN CONTRACTOR TO PROTECT OFF-SITE PARKING SURFACES PROTECT IN PLACE EXISTING TRAFFIC LIGHT. PROTECT IN PLACE EXISTING TRAFFIC LIGHT. REMOVE EXISTING STORM STRUCTURE K PRELIMINARY - NOT FOR CONSTRUCTIONMICHAEL C. BRANDT, P.E. 01/19/2024 462661DATE: SPECIFICATION OR REPORT WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE LAWS OF THE STATE OF MINNESOTA. MN LIC. NO. PRELIMINARY NOT FOR CONSTRUCTION LAND USE APPLICATION 1/19/2024 ORIGINAL ISSUE: REVISIONS: No.Description Date MARKET BLVD & W 78TH ST 2024 KIMLEY-HORN AND ASSOCIATES, INC. 767 EUSTIS STREET, SUITE 100, ST. PAUL, MN 55114 PHONE: 651-645-4197 WWW.KIMLEY-HORN.COM © MARKET BLVD & W 78TH ST LIMITS OF CONSTRUCTION REMOVE BITUMINOUS SURFACE REMOVE CONCRETE SURFACE REMOVE BUILDING REMOVE TREE REMOVE CONCRETE CURB & GUTTER REMOVE UTILITY LINES PROPERTY LINE EXISTING UNDERGROUND POWER LINE EXISTING WOOD FENCE EXISTING RETAINING WALL EXISTING SANITARY SEWER EXISTING STORM SEWER EXISTING WATERMAIN EXISTING GAS MAIN EXISTING UNDERGROUND COMMUNICATIONS LINE EXISTING UNDERGROUND CABLE EXISTING CONTOUR EXISTING SIGN EXISTING STORM MANHOLE EXISTING STORM CATCHBASIN EXISTING GAS METER EXISTING POST INDICATOR VALVE EXISTING FIRE DEPARTMENT CONNECTION EXISTING GATE VALVE EXISTING HYDRANT EXISTING METAL COVER EXISTING ELECTRICAL METER EXISTING AIR CONDITIONER EXISTING TELEPHONE MANHOLE EXISTING CABLE BOX EXISTING LIGHT POLE EXISTING TREE CLEARING & GRUBBING EXISTING CURB & GUTTER LEGEND FULL DEPTH SAWCUT REMOVE LIGHT POLE 1.THE CONTRACTOR IS RESPONSIBLE FOR THE DEMOLITION, REMOVAL, AND DISPOSAL (IN A LOCATION APPROVED BY ALL GOVERNING AUTHORITIES) OF ALL STRUCTURES, PADS, WALLS, FLUMES, FOUNDATIONS, PARKING, DRIVES, DRAINAGE STRUCTURES, UTILITIES, ETC. SUCH THAT THE IMPROVEMENTS ON THE PLANS CAN BE CONSTRUCTED. FACILITIES TO BE REMOVED SHALL BE UNDERCUT TO SUITABLE MATERIAL AND BROUGHT TO GRADE WITH SUITABLE COMPACTED FILL MATERIAL PER THE PROJECT DOCUMENTS. 2.THE CONTRACTOR IS RESPONSIBLE FOR REMOVING ALL DEBRIS FROM THE SITE AND DISPOSING OF THE DEBRIS IN A LAWFUL MANNER AND IN ACCORDANCE WITH LOCAL AND STATE REGULATIONS. THE CONTRACTOR SHALL OBTAIN ANY REQUIRED PERMITS FOR DEMOLITION AND DISPOSAL FROM THE APPROPRIATE LOCAL AND STATE AGENCIES. CONTRACTOR SHALL PROVIDE COPIES OF THE PERMIT AND RECEIPTS OF DISPOSAL OF MATERIALS TO THE OWNER AND OWNERS REPRESENTATIVE, INCLUDING THE TYPE OF DEBRIS AND LOCATION WHERE IT WAS DISPOSED. 3.THE CONTRACTOR SHALL MAINTAIN UTILITY SERVICES TO ADJACENT PROPERTIES AT ALL TIMES. UTILITY SERVICES SHALL NOT BE INTERRUPTED WITHOUT APPROVAL FROM THE CONSTRUCTION MANAGER AND COORDINATION WITH THE ADJACENT PROPERTIES AND/OR THE CITY. 4.THE CONTRACTOR SHALL COORDINATE WITH RESPECTIVE UTILITY COMPANIES PRIOR TO THE REMOVAL AND/OR RELOCATION OF UTILITIES. THE CONTRACTOR SHALL COORDINATE WITH THE UTILITY COMPANY CONCERNING PORTIONS OF WORK WHICH MAY BE PERFORMED BY THE UTILITY COMPANY'S FORCES AND ANY FEES WHICH ARE TO BE PAID TO THE UTILITY COMPANY FOR THEIR SERVICES. THE CONTRACTOR IS RESPONSIBLE FOR PAYING ALL FEES AND CHARGES. 5.THE LOCATIONS OF EXISTING UTILITIES SHOWN ON THE PLAN HAVE BEEN DETERMINED FROM THE BEST INFORMATION AVAILABLE AND ARE GIVEN FOR THE CONVENIENCE OF THE CONTRACTOR. THE ENGINEER ASSUMES NO RESPONSIBILITY FOR THEIR ACCURACY. PRIOR TO THE START OF ANY DEMOLITION ACTIVITY, THE CONTRACTOR SHALL NOTIFY THE AFFECTED UTILITY COMPANIES TO PROVIDE LOCATIONS OF EXISTING UTILITIES WITHIN PROPOSED WORK AREA. 6.EXISTING SEWERS, PIPING AND UTILITIES SHOWN ARE BASED ON AVAILABLE RECORD PLAN DATA AND/OR FIELD UTILITY MARKINGS AND ARE NOT TO BE INTERPRETED AS THE EXACT LOCATION. ADDITIONAL UNMARKED OBSTACLES MAY EXIST ON THE SITE. VERIFY EXISTING CONDITIONS AND PROCEED WITH CAUTION AROUND ANY ANTICIPATED UNDERGROUND FEATURES. GIVE NOTICE TO AFFECTED UTILITY COMPANIES REGARDING REMOVAL OF SERVICE LINES AND CAP ANY ABANDONED LINES BEFORE PRECEDING WITH THE PROPOSED WORK. 7.ELECTRICAL, TELEPHONE, CABLE, WATER, FIBER OPTIC, AND/OR GAS LINES NEEDING TO BE REMOVED OR RELOCATED SHALL BE COORDINATED WITH THE AFFECTED UTILITY COMPANY. ADEQUATE TIME SHALL BE PROVIDED FOR RELOCATION AND CLOSE COORDINATION WITH THE UTILITY COMPANY IS NECESSARY TO PROVIDE A SMOOTH TRANSITION IN UTILITY SERVICE. CONTRACTOR SHALL PAY CLOSE ATTENTION TO EXISTING UTILITIES WITHIN ANY ROAD RIGHT-OF-WAY DURING CONSTRUCTION. 8.CONTRACTOR MUST PROTECT THE PUBLIC AT ALL TIMES WITH FENCING, BARRICADES, ENCLOSURES, ETC. (AND OTHER APPROPRIATE BEST MANAGEMENT PRACTICES) AS APPROVED BY THE CONSTRUCTION MANAGER. MAINTENANCE OF TRAFFIC CONTROL SHALL BE COORDINATED IN ACCORDANCE WITH THE CITY, COUNTY, AND STATE DOT AS NECESSARY. 9.CONTRACTOR SHALL MAINTAIN ACCESS TO ADJACENT PROPERTIES DURING CONSTRUCTION, AND SHALL NOTIFY ADJACENT PROPERTY OWNERS IF ACCESS WILL BE INTERRUPTED OR ALTERED AT ANY TIME DURING CONSTRUCTION. 10.PRIOR TO THE START OF DEMOLITION, INSTALL EROSION CONTROL BMP'S IN ACCORDANCE WITH THE EROSION & SEDIMENT CONTROL PLANS / SWPPP. 11.CONTRACTOR MAY LIMIT SAW-CUT AND PAVEMENT REMOVAL TO ONLY THOSE AREAS WHERE IT IS REQUIRED AS SHOWN ON THESE CONSTRUCTION PLANS BUT IF ANY DAMAGE IS INCURRED ON ANY OF THE SURROUNDING PAVEMENT OR CURB, THE CONTRACTOR SHALL BE RESPONSIBLE FOR ITS REMOVAL AND REPAIR. 12.THE CONTRACTOR SHALL COORDINATE WATER MAIN WORK WITH THE CITY WATER AND FIRE DEPARTMENTS TO ENSURE ADEQUATE FIRE PROTECTION IS CONSTANTLY AVAILABLE TO THE SITE AND SURROUNDING PROPERTIES THROUGH ALL PHASES OF CONSTRUCTION. CONTRACTOR WILL BE RESPONSIBLE FOR ARRANGING/PROVIDING ANY REQUIRED WATER MAIN SHUT OFFS WITH THE CITY. ANY COSTS ASSOCIATED WITH WATER MAIN SHUT OFFS WILL BE THE RESPONSIBILITY OF THE CONTRACTOR AND NO EXTRA COMPENSATION WILL BE PROVIDED. 13.IN THE EVENT A WELL IS FOUND, THE CONTRACTOR SHALL CONTACT THE ENGINEER AND OWNER IMMEDIATELY. ALL WELLS SHALL BE SEALED BY A LICENSED WELL CONTRACTOR IN ACCORDANCE WITH STATE REQUIREMENTS. 14.IN THE EVENT THAT UNKNOWN CONTAINERS OR TANKS ARE ENCOUNTERED, THE CONTRACTOR SHALL CONTACT THE OWNER AND/OR OWNERS REPRESENTATIVE IMMEDIATELY. ALL CONTAINERS SHALL BE DISPOSED OF AT A PERMITTED LANDFILL PER THE PROJECT DOCUMENTS. 15.CONTRACTOR SHALL NOTIFY THE ENGINEER IF ANY EXISTING DRAINTILE IS ENCOUNTERED ON SITE; ACTIVE DRAINTILE SHALL NOT BE REMOVED WITHOUT APPROVAL FROM THE ENGINEER. 16.IF CONTAMINATED MATERIAL IS ENCOUNTERED ON THE PROJECT SITE, THE CONTRACTOR SHALL STOP WORK AND NOTIFY THE OWNER AND ENGINEER IMMEDIATELY. DEMOLITION PLAN NOTES KEYNOTE LEGEND SAWCUT EXISTING PAVEMENT REMOVE EXISTING CURB REMOVE EXISTING SIDEWALK REMOVE EXISTING PAVEMENT REMOVE EXISTING FENCE REMOVE EXISTING TREE REMOVE EXISTING SIGN REMOVE EXISTING LIGHT POLE REMOVE EXISTING WATER LINE / HYDRANT / VALVE REMOVE EXISTING SEWER LINE / STRUCTURE REMOVE EXISTING STORM LINE / STRUCTURE PROTECT EXISTING STORM LINE / STRUCTURE PROTECT EXISTING WATER LINE / HYDRANT / VALVE PROTECT EXISTING SEWER LINE / STRUCTURE PROTECT EXISTING BUILDING / STRUCTURE REMOVE EXISTING BUILDING / STRUCTURE PROTECT EXISTING LIGHT POLE PROTECT EXISTING TREE A B C D E F G H I J K L M N O P Q RNORTH C200 SITE DEMOLITION PLAN ABANDON UTILITY LINES IN PLACE 591 78TH STREET WEST 575 78TH STREET WEST 570 MARKET STREET 7 8 T H S T R E E T W E S T M A R K E T B O U L E V A R D7 8 T H S T R E E T W E S T B O U L E V A R DM A R K E TITEM 11 &2MMITME1T 12 751 ITEM 7 &2MMITME1T 12 7573 ITEM 7 &2MMITME1T 12 7573ITEM 7 &2MMITME1T 12 7573ITEM 19 &2MMITME1T 12 7573 ITEM 18 &2MMITME1T 12 7573 ITEM 17 &2MMITME1T 12 7573 ITEM 14 &2MMITME1T 12 751 ITEM 13 &2MMITME1T 12 751ITEM 13 &2MMITME1T 12 751ITEM 15 &2MMITME1T 12 7573 SD SDSD SD SD SD SDSD SDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSDSD SD SD SD SDSD SDSD SD3.29%2.47%4.04%3.46%1.11% 1.11% 1 . 4 3% 1.6 3 %3.01%4.87%2.73%1.2 7 %4.00%8.88%A B B B B B B B A C 9709 7 5 9 6 6 966966 967 9 6 8 9 6 9 971972973 97397397497 4 976977975 975973973 973974 974976976977 D D B A CONTRACTOR TO PROTECT EXISTING OFF-SITE PARKING SURFACES B SOIL TYPE: KB 3.4 ACRES SOIL TYPE: KC-2 0.3 ACRES SOIL TYPE: KB 0.4 ACRES SOIL TYPE: LA 0.1 ACRES SOIL TYPE: CO 0.1 ACRES B B B B B B B3.74%3.57%4.76 %4.94% 4.64 %5.14%1.72% 2 . 0 2% 2.80 % 4.14 % 2.86 %2.27% 1.1 0 %1.40%0.72%1.INSTALL PERIMETER EROSION CONTROL (I.E. SILT FENCE) AND INLET PROTECTION AT EXISTING STORMWATER INLETS. 2.CONSTRUCT STABILIZED CONSTRUCTION ENTRANCE AND CONCRETE WASHOUT 3.PREPARE TEMPORARY PARKING AND STORAGE AREA. 4.CONSTRUCT AND STABILIZE DIVERSIONS AND TEMPORARY SEDIMENT BASINS. 5.CLEAR AND GRUB THE SITE. 6.BEGIN MASS SITE GRADING AND ROUGH GRADE SITE SUFFICIENTLY TO ESTABLISH PROPOSED DRAINAGE PATTERNS. 7.START CONSTRUCTION OF THE BUILDING PAD AND STRUCTURES. 8.TEMPORARILY SEED, THROUGHOUT CONSTRUCTION, DISTURBED AREAS THAT WILL BE INACTIVE FOR 14 DAYS OR MORE OR AS REQUIRED BY THE NPDES AND/OR CITY GRADING PERMIT(S). NOTE: THE SEQUENCE OF CONSTRUCTION IS INTENDED TO CONVEY THE GENERAL CONCEPTS OF THE EROSION CONTROL DESIGN AND SHOULD NOT BE RELIED UPON FOR CONSTRUCTION PURPOSES. THE CONTRACTOR IS SOLELY RESPONSIBLE FOR DETAILED PHASING AND CONSTRUCTION SEQUENCING NECESSARY TO CONSTRUCT THE PROPOSED IMPROVEMENTS. THE CONTRACTOR SHALL NOTIFY THE ENGINEER IN WRITING IMMEDIATELY, PRIOR TO AND/OR DURING CONSTRUCTION IF ANY ADDITIONAL INFORMATION ON THE CONSTRUCTION SEQUENCE IS NECESSARY. PHASE 1 SEQUENCE OF CONSTRUCTION ROCK ENTRANCE INLET PROTECTION SILT FENCE LIMITS OF DISTURBANCE SAFETY FENCE SILT DIKE LEGEND EROSION CONTROL BLANKET 1.THE STORM WATER POLLUTION PREVENTION PLAN ("SWPPP") IS COMPRISED OF THE EROSION CONTROL PLAN, THE STANDARD DETAILS, THE PLAN NARRATIVE, ATTACHMENTS INCLUDED IN THE SPECIFICATIONS OF THE SWPPP, PLUS THE PERMIT AND ALL SUBSEQUENT REPORTS AND RELATED DOCUMENTS. 2.ALL CONTRACTORS AND SUBCONTRACTORS INVOLVED WITH LAND DISTURBING ACTIVITIES SHALL OBTAIN A COPY OF THE SWPPP AND NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) GENERAL PERMIT, AND BECOME FAMILIAR WITH THEIR CONTENTS. 3.BEST MANAGEMENT PRACTICES (BMP'S) AND CONTROLS SHALL CONFORM TO FEDERAL, STATE AND LOCAL REQUIREMENTS, AS APPLICABLE. THE CONTRACTOR SHALL IMPLEMENT ADDITIONAL CONTROLS AS DIRECTED BY THE PERMITTING AGENCY, ENGINEER OR OWNER. 4.SITE ENTRY AND EXIT LOCATIONS SHALL BE MAINTAINED IN A CONDITION THAT WILL PREVENT THE TRACKING OR FLOWING OF SEDIMENT ONTO PUBLIC ROADWAYS. SEDIMENT SPILLED, DROPPED, WASHED, OR TRACKED ONTO A PUBLIC ROADWAY FROM THE CONSTRUCTION SITE MUST BE REMOVED AS SOON AS PRACTICABLE. WHEN WASHING IS REQUIRED TO REMOVE SEDIMENT PRIOR TO ENTRANCE ONTO A PUBLIC ROADWAY, IT SHALL BE DONE IN AN AREA STABILIZED WITH CRUSHED STONE WHICH DRAINS INTO AN APPROVED SEDIMENT BASIN. ANY FINES IMPOSED FOR DISCHARGING SEDIMENT ONTO A PUBLIC RIGHT OF WAY SHALL BE PAID BY THE CONTRACTOR. 5.TEMPORARY SEEDING OR OTHER APPROVED METHODS OF STABILIZATION SHALL BE INITIATED WITHIN 7 DAYS OF THE LAST DISTURBANCE ON ANY AREA OF THE SITE. 6.THE CONTRACTOR SHALL MINIMIZE LAND DISTURBANCE AND CLEARING TO THE MAXIMUM EXTENT PRACTICAL OR AS REQUIRED BY THE GENERAL PERMIT. 7.CONTRACTOR SHALL DENOTE ON THE PLAN THE TEMPORARY PARKING AND STORAGE AREA WHICH SHALL ALSO BE USED AS THE EQUIPMENT MAINTENANCE AND CLEANING AREA, EMPLOYEE PARKING AREA, AND AREA FOR LOCATING PORTABLE FACILITIES, OFFICE TRAILERS, AND TOILET FACILITIES. 8.ALL WASH WATER FROM THE CONSTRUCTION SITE (CONCRETE TRUCKS, VEHICLE CLEANING, EQUIPMENT CLEANING, ETC.) SHALL BE DETAINED AND PROPERLY TREATED BEFORE DISPOSAL. 9.SUFFICIENT OIL AND GREASE ABSORBING MATERIALS AND FLOTATION BOOMS SHALL BE MAINTAINED ON SITE OR READILY AVAILABLE TO CONTAIN AND CLEAN-UP FUEL OR CHEMICAL SPILLS AND LEAKS. 10.THE CONTRACTOR SHALL BE RESPONSIBLE FOR DUST CONTROL ON SITE. THE USE OF MOTOR OILS AND OTHER PETROLEUM BASED OR TOXIC LIQUIDS FOR DUST SUPPRESSION OPERATIONS IS PROHIBITED. 11.RUBBISH, TRASH, GARBAGE, LITTER, OR OTHER SUCH MATERIALS SHALL BE DEPOSITED INTO SEALED CONTAINERS. MATERIALS SHALL BE PREVENTED FROM LEAVING THE PREMISES THROUGH THE ACTION OF WIND OR STORM WATER DISCHARGE INTO DRAINAGE DITCHES OR WATERS OF THE STATE. 12.STAGING AREAS, STOCKPILES, SPOILS, ETC. SHALL BE LOCATED OUTSIDE OF DRAINAGE WAYS SUCH THAT STORM WATER RUNOFF WILL NOT BE ADVERSELY AFFECTED. PROVIDE STABILIZATION MEASURES SUCH AS PERIMETER EROSION CONTROL BMP'S, SEEDING, OR OTHER COVERING AS NECESSARY TO PREVENT EROSION. 13.CONTRACTOR SHALL BE RESPONSIBLE FOR RE-ESTABLISHING ANY EROSION CONTROL BMP DISTURBED DURING CONSTRUCTION OPERATIONS. NOTIFY THE OWNER'S REPRESENTATIVE OF ANY DEFICIENCIES IN THE ESTABLISHED EROSION CONTROL MEASURES THAT MAY LEAD TO UNAUTHORIZED DISCHARGE OF STORM WATER POLLUTANTS. UNAUTHORIZED POLLUTANTS INCLUDE (BUT ARE NOT LIMITED TO) EXCESS CONCRETE DUMPING, CONCRETE RESIDUE, PAINTS, SOLVENTS, GREASES, FUELS, LUBRICANT OILS, PESTICIDES, AND SOLID WASTE MATERIALS. 14.EROSION CONTROL BMP'S SHOWN ON THESE PLANS SHALL BE INSTALLED PRIOR TO THE START OF LAND-DISTURBING ACTIVITIES ON THE PROJECT, AND INITIATED AS SOON AS PRACTICABLE. 15.THE CONTRACTOR IS SOLELY RESPONSIBLE FOR COMPLYING WITH THE REQUIREMENTS OF THE AUTHORITIES HAVING JURISDICTION, AND SHALL MAINTAIN COMPLIANCE WITH APPLICABLE LAWS AND REGULATIONS FOR THE DURATION OF CONSTRUCTION. 16.THE CONTRACTOR SHALL FIELD ADJUST AND/OR PROVIDE ADDITIONAL EROSION CONTROL BMP'S AS NEEDED TO PREVENT EROSION AND OFF-SITE SEDIMENT DISCHARGE FROM THE CONSTRUCTION SITE. LOG AND RECORD ANY ADJUSTMENTS AND DEVIATIONS FROM THE APPROVED EROSION CONTROL PLANS WITHIN THE SWPPP DOCUMENTS STORED IN THE JOB SITE TRAILER. EROSION CONTROL PLAN NOTES PHASE I BMP QUANTITIES SILT FENCE ±1,355 LF INLET PROTECTION 17 EA ROCK CONSTRUCTION ENTRANCE 1 EA SILT DIKE ±1,250 LF THE CONTRACTOR MUST UPDATE THE SWPPP BY NOTING ON THE SITE MAPS IN THE JOB SITE BINDER TO REFLECT THE PROGRESS OF CONSTRUCTION ACTIVITIES AND GENERAL CHANGES TO THE PROJECT SITE FOR THE DURATION OF LAND DISTURBING ACTIVITIES. AT A MINIMUM, UPDATES SHALL BE MADE DAILY TO TRACK CONSTRUCTION PROGRESS DESCRIBED IN THE SEQUENCE OF CONSTRUCTION. THE CONTRACTOR IS RESPONSIBLE FOR NOTING THE LOCATION OF THE JOB SITE TRAILER, TEMPORARY PARKING & LAYDOWN AREAS, PORTA-POTTY, WHEEL WASH, CONCRETE WASHOUT, FUEL & MATERIAL STORAGE, SOLID WASTE CONTAINERS, AND OTHER CONSTRUCTION RELATED FACILITIES THAT MAY IMPACT STORMWATER RUNOFF. SWPPP UPDATES & AMENDMENTS KEYNOTE LEGEND SILT FENCE INLET PROTECTION ROCK CONSTRUCTION ENTRANCE SILT DIKE A B C D C300 EROSION CONTROL PLAN - PHASE 1 NORTH PROPERTY SUMMARY TOTAL PROPERTY AREA 4.09 AC / 178,247 SF EXISTING IMPERVIOUS AREA 3.36 AC / 146,306 SF / 82.1% EXISTING PERVIOUS AREA 0.73 AC / 31,941SF / 17.9% PROPOSED IMPERVIOUS AREA 3.66 AC / 159,455 SF / 89.5% PROPOSED PERVIOUS AREA 0.43 AC / 18,792 SF / 10.5% SD SOIL MAP LEGEND CO - CORDOVA CLAY LOAM, 0 TO 2 PERCENT SLOPES 0.1 ACRES KB - KILKENNY-LESTER LOAMS, 2 TO 6 PERCENT SLOPES 3.8 ACRES KC2 - LESTER-KILKENNY COMPLEX, 6 T O10 PERCENT SLOPES, MODERATELY ERODED 0.3 ACRES LA - LE SUEUR-LESTER COMPLEX, 1 TO 6 PERCENT SLOPES 0.1 ACRES PRELIMINARY - NOT FOR CONSTRUCTIONMICHAEL C. BRANDT, P.E. 01/19/2024 462661DATE: SPECIFICATION OR REPORT WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE LAWS OF THE STATE OF MINNESOTA. MN LIC. NO. PRELIMINARY NOT FOR CONSTRUCTION LAND USE APPLICATION 1/19/2024 ORIGINAL ISSUE: REVISIONS: No.Description Date MARKET BLVD & W 78TH ST 2024 KIMLEY-HORN AND ASSOCIATES, INC. 767 EUSTIS STREET, SUITE 100, ST. PAUL, MN 55114 PHONE: 651-645-4197 WWW.KIMLEY-HORN.COM MARKET BLVD & W 78TH ST 78TH STREET MARKET BOULEVARDLAREDODRIVESD SD SD SD SD SDSDSDSDSDS DSDSDSDSDSDSDSDSDSDSDSDSDSDSD3.72%1.26%3.92% 2 . 0 8% 2.66% A B B B B B B B D C B B B BB B C 965 970970970 975 966967968969 9719719 7 1971971 972972972972972 9739749 7 6 977965 97 0 975966 967 968 96 9 971 97197197297397397397 4 9 7 4 976 975974 976 976 977 9 7 7 B SOIL TYPE: KC-2 0.3 ACRES SOIL TYPE: KB 0.4 ACRES SOIL TYPE: LA 0.1 ACRES SOIL TYPE: CO 0.1 ACRES B 5.21%5.21%3.66%3.66%3.22%3.49%3.49%7.41 % B B B B B B B B B B BBB B1.46%1.48%SOIL TYPE: KB 3.4 ACRES 12.21%19.49%9.82%7.27%3.71 % 4.7 9 % 3. 5 5 % 1.TEMPORARILY SEED, THROUGHOUT CONSTRUCTION, DENUDED AREAS THAT WILL BE INACTIVE FOR 14 DAYS OR MORE. 2.CONSTRUCT UNDERGROUND SITE UTILITIES AND STORM SEWER, INCLUDING UNDERGROUND STORMWATER MANAGEMENT SYSTEM. 3.INSTALL APPROPRIATE INLET PROTECTION AT ANY NEW STORM SEWER STRUCTURES AS EACH STRUCTURE IS CONSTRUCTED. 4.COMPLETE SITE GRADING AND PERMANENTLY STABILIZE AREAS TO BE VEGETATED AS THEY ARE BROUGHT TO FINAL GRADE. 5.PLACE PAVEMENT BASE MATERIAL AND INSTALL SUBDRAINAGE SYSTEM. 6.CONSTRUCT PAVEMENTS, CURB & GUTTER, AND SIDEWALKS. 7.AS APPROPRIATE, REPLACE & MAINTAIN INLET PROTECTION DEVICES WITHIN PAVED AREAS AS WORK PROGRESSES. 8.COMPLETE FINAL GRADING AND INSTALL OF PERMANENT STABILIZATION (SEEDING, SODDING, ETC.) WITHIN LANDSCAPED AREAS. 9.WHEN THE SITE HAS ACHIEVED FINAL STABILIZATION AS DEFINED BY THE APPLICABLE EROSION CONTROL PERMITS, REMOVE ALL REMAINING TEMPORARY EROSION & SEDIMENT CONTROL BMP'S AND RE-STABILIZE ANY AREAS DISTURBED BY THE REMOVAL. NOTE: THE SEQUENCE OF CONSTRUCTION IS INTENDED TO CONVEY THE GENERAL CONCEPTS OF THE EROSION CONTROL DESIGN AND SHOULD NOT BE RELIED UPON FOR CONSTRUCTION PURPOSES. THE CONTRACTOR IS SOLELY RESPONSIBLE FOR DETAILED PHASING AND CONSTRUCTION SEQUENCING NECESSARY TO CONSTRUCT THE PROPOSED IMPROVEMENTS. THE CONTRACTOR SHALL NOTIFY THE ENGINEER IN WRITING IMMEDIATELY, PRIOR TO AND/OR DURING CONSTRUCTION IF ANY ADDITIONAL INFORMATION ON THE CONSTRUCTION SEQUENCE IS NECESSARY. PHASE 2 SEQUENCE OF CONSTRUCTION ROCK ENTRANCE INLET PROTECTION SILT FENCE LIMITS OF DISTURBANCE SAFETY FENCE SILT DIKE LEGEND EROSION CONTROL BLANKET 1.THE STORM WATER POLLUTION PREVENTION PLAN ("SWPPP") IS COMPRISED OF THE EROSION CONTROL PLAN, THE STANDARD DETAILS, THE PLAN NARRATIVE, ATTACHMENTS INCLUDED IN THE SPECIFICATIONS OF THE SWPPP, PLUS THE PERMIT AND ALL SUBSEQUENT REPORTS AND RELATED DOCUMENTS. 2.ALL CONTRACTORS AND SUBCONTRACTORS INVOLVED WITH LAND DISTURBING ACTIVITIES SHALL OBTAIN A COPY OF THE SWPPP AND NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) GENERAL PERMIT, AND BECOME FAMILIAR WITH THEIR CONTENTS. 3.BEST MANAGEMENT PRACTICES (BMP'S) AND CONTROLS SHALL CONFORM TO FEDERAL, STATE AND LOCAL REQUIREMENTS, AS APPLICABLE. THE CONTRACTOR SHALL IMPLEMENT ADDITIONAL CONTROLS AS DIRECTED BY THE PERMITTING AGENCY, ENGINEER OR OWNER. 4.SITE ENTRY AND EXIT LOCATIONS SHALL BE MAINTAINED IN A CONDITION THAT WILL PREVENT THE TRACKING OR FLOWING OF SEDIMENT ONTO PUBLIC ROADWAYS. SEDIMENT SPILLED, DROPPED, WASHED, OR TRACKED ONTO A PUBLIC ROADWAY FROM THE CONSTRUCTION SITE MUST BE REMOVED AS SOON AS PRACTICABLE. WHEN WASHING IS REQUIRED TO REMOVE SEDIMENT PRIOR TO ENTRANCE ONTO A PUBLIC ROADWAY, IT SHALL BE DONE IN AN AREA STABILIZED WITH CRUSHED STONE WHICH DRAINS INTO AN APPROVED SEDIMENT BASIN. ANY FINES IMPOSED FOR DISCHARGING SEDIMENT ONTO A PUBLIC RIGHT OF WAY SHALL BE PAID BY THE CONTRACTOR. 5.TEMPORARY SEEDING OR OTHER APPROVED METHODS OF STABILIZATION SHALL BE INITIATED WITHIN 7 DAYS OF THE LAST DISTURBANCE ON ANY AREA OF THE SITE. 6.THE CONTRACTOR SHALL MINIMIZE LAND DISTURBANCE AND CLEARING TO THE MAXIMUM EXTENT PRACTICAL OR AS REQUIRED BY THE GENERAL PERMIT. 7.CONTRACTOR SHALL DENOTE ON THE PLAN THE TEMPORARY PARKING AND STORAGE AREA WHICH SHALL ALSO BE USED AS THE EQUIPMENT MAINTENANCE AND CLEANING AREA, EMPLOYEE PARKING AREA, AND AREA FOR LOCATING PORTABLE FACILITIES, OFFICE TRAILERS, AND TOILET FACILITIES. 8.ALL WASH WATER FROM THE CONSTRUCTION SITE (CONCRETE TRUCKS, VEHICLE CLEANING, EQUIPMENT CLEANING, ETC.) SHALL BE DETAINED AND PROPERLY TREATED BEFORE DISPOSAL. 9.SUFFICIENT OIL AND GREASE ABSORBING MATERIALS AND FLOTATION BOOMS SHALL BE MAINTAINED ON SITE OR READILY AVAILABLE TO CONTAIN AND CLEAN-UP FUEL OR CHEMICAL SPILLS AND LEAKS. 10.THE CONTRACTOR SHALL BE RESPONSIBLE FOR DUST CONTROL ON SITE. THE USE OF MOTOR OILS AND OTHER PETROLEUM BASED OR TOXIC LIQUIDS FOR DUST SUPPRESSION OPERATIONS IS PROHIBITED. 11.RUBBISH, TRASH, GARBAGE, LITTER, OR OTHER SUCH MATERIALS SHALL BE DEPOSITED INTO SEALED CONTAINERS. MATERIALS SHALL BE PREVENTED FROM LEAVING THE PREMISES THROUGH THE ACTION OF WIND OR STORM WATER DISCHARGE INTO DRAINAGE DITCHES OR WATERS OF THE STATE. 12.STAGING AREAS, STOCKPILES, SPOILS, ETC. SHALL BE LOCATED OUTSIDE OF DRAINAGE WAYS SUCH THAT STORM WATER RUNOFF WILL NOT BE ADVERSELY AFFECTED. PROVIDE STABILIZATION MEASURES SUCH AS PERIMETER EROSION CONTROL BMP'S, SEEDING, OR OTHER COVERING AS NECESSARY TO PREVENT EROSION. 13.CONTRACTOR SHALL BE RESPONSIBLE FOR RE-ESTABLISHING ANY EROSION CONTROL BMP DISTURBED DURING CONSTRUCTION OPERATIONS. NOTIFY THE OWNER'S REPRESENTATIVE OF ANY DEFICIENCIES IN THE ESTABLISHED EROSION CONTROL MEASURES THAT MAY LEAD TO UNAUTHORIZED DISCHARGE OF STORM WATER POLLUTANTS. UNAUTHORIZED POLLUTANTS INCLUDE (BUT ARE NOT LIMITED TO) EXCESS CONCRETE DUMPING, CONCRETE RESIDUE, PAINTS, SOLVENTS, GREASES, FUELS, LUBRICANT OILS, PESTICIDES, AND SOLID WASTE MATERIALS. 14.EROSION CONTROL BMP'S SHOWN ON THESE PLANS SHALL BE INSTALLED PRIOR TO THE START OF LAND-DISTURBING ACTIVITIES ON THE PROJECT, AND INITIATED AS SOON AS PRACTICABLE. 15.THE CONTRACTOR IS SOLELY RESPONSIBLE FOR COMPLYING WITH THE REQUIREMENTS OF THE AUTHORITIES HAVING JURISDICTION, AND SHALL MAINTAIN COMPLIANCE WITH APPLICABLE LAWS AND REGULATIONS FOR THE DURATION OF CONSTRUCTION. 16.THE CONTRACTOR SHALL FIELD ADJUST AND/OR PROVIDE ADDITIONAL EROSION CONTROL BMP'S AS NEEDED TO PREVENT EROSION AND OFF-SITE SEDIMENT DISCHARGE FROM THE CONSTRUCTION SITE. LOG AND RECORD ANY ADJUSTMENTS AND DEVIATIONS FROM THE APPROVED EROSION CONTROL PLANS WITHIN THE SWPPP DOCUMENTS STORED IN THE JOB SITE TRAILER. EROSION CONTROL PLAN NOTES PHASE 2 BMP QUANTITIES SILT FENCE ±1,330 LF INLET PROTECTION 31 EA ROCK CONSTRUCTION ENTRANCE 1 EA SILT DIKE ±680 LF THE CONTRACTOR MUST UPDATE THE SWPPP BY NOTING ON THE SITE MAPS IN THE JOB SITE BINDER TO REFLECT THE PROGRESS OF CONSTRUCTION ACTIVITIES AND GENERAL CHANGES TO THE PROJECT SITE FOR THE DURATION OF LAND DISTURBING ACTIVITIES. AT A MINIMUM, UPDATES SHALL BE MADE DAILY TO TRACK CONSTRUCTION PROGRESS DESCRIBED IN THE SEQUENCE OF CONSTRUCTION. THE CONTRACTOR IS RESPONSIBLE FOR NOTING THE LOCATION OF THE JOB SITE TRAILER, TEMPORARY PARKING & LAYDOWN AREAS, PORTA-POTTY, WHEEL WASH, CONCRETE WASHOUT, FUEL & MATERIAL STORAGE, SOLID WASTE CONTAINERS, AND OTHER CONSTRUCTION RELATED FACILITIES THAT MAY IMPACT STORMWATER RUNOFF. SWPPP UPDATES & AMENDMENTS KEYNOTE LEGEND SILT FENCE INLET PROTECTION ROCK CONSTRUCTION ENTRANCE SILT DIKE A B C D PRELIMINARY - NOT FOR CONSTRUCTIONMICHAEL C. BRANDT, P.E. 01/19/2024 462661DATE: SPECIFICATION OR REPORT WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE LAWS OF THE STATE OF MINNESOTA. MN LIC. NO. PRELIMINARY NOT FOR CONSTRUCTION LAND USE APPLICATION 1/19/2024 ORIGINAL ISSUE: REVISIONS: No.Description Date MARKET BLVD & W 78TH ST 2024 KIMLEY-HORN AND ASSOCIATES, INC. 767 EUSTIS STREET, SUITE 100, ST. PAUL, MN 55114 PHONE: 651-645-4197 WWW.KIMLEY-HORN.COM MARKET BLVD & W 78TH ST C301 EROSION CONTROL PLAN - PHASE 2 NORTH SOIL MAP LEGEND CO - CORDOVA CLAY LOAM, 0 TO 2 PERCENT SLOPES 0.1 ACRES KB - KILKENNY-LESTER LOAMS, 2 TO 6 PERCENT SLOPES 3.8 ACRES KC2 - LESTER-KILKENNY COMPLEX, 6 T O10 PERCENT SLOPES, MODERATELY ERODED 0.3 ACRES LA - LE SUEUR-LESTER COMPLEX, 1 TO 6 PERCENT SLOPES 0.1 ACRES PROPERTY SUMMARY TOTAL PROPERTY AREA 4.09 AC / 178,247 SF DISTURBED AREA 5.57 AC / EXISTING IMPERVIOUS AREA 3.36 AC / 146,306 SF / 82.1% EXISTING PERVIOUS AREA 0.73 AC / 31,941SF / 17.9% PROPOSED IMPERVIOUS AREA 3.66 AC / 159,455 SF / 89.5% PROPOSED PERVIOUS AREA 0.43 AC / 18,792 SF / 10.5% SOIL BOUNDARY - PER NRCS SD C302 EROSION CONTROL DETAILS PRELIMINARY - NOT FOR CONSTRUCTIONPRELIMINARY NOT FOR CONSTRUCTION LAND USE APPLICATION 1/19/2024 ORIGINAL ISSUE: REVISIONS: No.Description Date MARKET BLVD & W 78TH ST 2024 KIMLEY-HORN AND ASSOCIATES, INC. 767 EUSTIS STREET, SUITE 100, ST. PAUL, MN 55114 PHONE: 651-645-4197 WWW.KIMLEY-HORN.COM MARKET BLVD & W 78TH ST N.T.S. APRON ON THIS SIDE OF THE DIKE SHALL BE FOLDED UNDER THE DIKE SECTION 20" AND GLUED DOWN CONSTRUCTION AREA ASPHALT PAVEMENT EXISTING CONCRETE OR A A APRON ADHESIVE FLOW ADHESIVE 20"20"ADHESIVEADHESIVEADHESIVE ADHESIVE NOTES: 1. INSTALLED SILT DIKE UNIT SHALL HAVE CONTINUOUS AND FIRM CONTACT WITH PAVEMENT. 2. ADHESIVES SHALL BE LIQUID NAIL OR APPROVED EQUAL FOR CONCRETE PAVEMENT APPLICATIONS AND EMULSIFIED ASPHALT FOR ASPHALT APPLICATIONS. ADHESIVE SHALL BE PLACED WHERE THE UNITS OVERLAP AND A 20" STRIP ALONG BOTH EDGES. FLOW OVERLAP PER MANUFACTURER'S RECOMMENDATIONS SECTION A-A DIKE PLAN VIEW 1 SILT DIKE USGS SOIL MAP Soil Map—Carver County, Minnesota (Chanhassen) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/31/2023 Page 1 of 349675104967560496761049676604967710496776049678104967510496756049676104967660496771049677604967810457420457470457520457570457620457670457720457770457820457870 457420 457470 457520 457570 457620 457670 457720 457770 457820 457870 44° 51' 45'' N 93° 32' 21'' W44° 51' 45'' N93° 31' 58'' W44° 51' 34'' N 93° 32' 21'' W44° 51' 34'' N 93° 31' 58'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 15N WGS84 0 100 200 400 600 Feet 0 30 60 120 180 Meters Map Scale: 1:2,290 if printed on A landscape (11" x 8.5") sheet. Soil Map may not be valid at this scale. PROJECT SITE MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:12,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Carver County, Minnesota Survey Area Data: Version 20, Sep 10, 2023 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: May 30, 2020—Jul 3, 2020 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Soil Map—Carver County, Minnesota (Chanhassen) Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/31/2023 Page 2 of 3 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI CO Cordova clay loam, 0 to 2 percent slopes 6.3 26.0% GL Glencoe clay loam, 0 to 1 percent slopes 0.5 2.0% KB Kilkenny-Lester loams, 2 to 6 percent slopes 13.2 54.9% KC2 Lester-Kilkenny complex, 6 to 10 percent slopes, moderately eroded 1.0 4.1% LA Le Sueur-Lester complex, 1 to 6 percent slopes 2.1 8.9% W Water 1.0 4.1% Totals for Area of Interest 24.1 100.0% Soil Map—Carver County, Minnesota Chanhassen Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 10/31/2023 Page 3 of 3 SOIL BORINGS ST-1 ST-2 ST-3 ST-4 ST-5 ST-6 ST-7 ST-8 ST-9 ST-18 ST-19 ST-16 ST-17 ST-15 ST-14 ST-13 ST-12 ST-10 ST-11 W. 78TH STREET MARKET BOULEVARDMARKET S T R E E T F:\2023\B2307983\CAD\B2307983.dwg,Geotech,9/28/2023 5:32:49 AMbraunintertec.com 952.995.2000 Minneapolis, MN 55438 11001 Hampshire Avenue S Project No: B2307983 Drawn By: Date Drawn: Checked By: Last Modified:9/28/23 Drawing No: Project Information Drawing Information B2307983 JAG 8/28/23 AS Chanhassen Multi-Family Development 591 W. 78th Street Chanhassen, Minnesota Soil Boring Location SketchN DENOTES APPROXIMATE LOCATION OF STANDARD PENETRATION TEST BORING 0 SCALE:1"= 80' 80'40' Elev./ Depth ft 972.6 0.8 964.4 9.0 961.4 12.0 954.4 19.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) LEAN CLAY (CL), trace roots, black, moist (TOPSOIL FILL) FILL: SANDY LEAN CLAY (CL), trace Gravel, slightly organic, dark brown and gray, moist CLAYEY SAND (SC), trace Gravel, brown and gray, moist, medium (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, medium (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) Becoming gray at 24 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 1-4-4 (8) 9" 3-3-3 (6) 17" 3-4-5 (9) 18" 2-3-4 (7) 17" 2-3-3 (6) 17" 2-2-3 (5) 18" 3-5-8 (13) 18" 6-8-9 (17) 18" 15-9-10 (19) 18" qₚ tsf 2.75 2.5 4 MC % 20 22 Tests or Remarks OC=2% LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-1 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181136.7 EASTING:559376.5 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/07/23 END DATE:09/07/23 SURFACE ELEVATION:973.4 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Grass WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-1 page 1 of 2DRAFT Elev./ Depth ft 937.4 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 4-7-8 (15) 18" qₚ tsf 2 MC %Tests or Remarks Water not observed while drilling. Water not observed to cave-in depth of 31.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-1 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181136.7 EASTING:559376.5 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/07/23 END DATE:09/07/23 SURFACE ELEVATION:973.4 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Grass WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-1 page 2 of 2DRAFT Elev./ Depth ft 972.6 1.3 969.9 4.0 964.9 9.0 961.9 12.0 959.9 14.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 5 inches of concrete over 11 inches of apparent aggregate base FILL: LEAN CLAY (CL), contains lenses of Silt, brown, moist SILTY CLAY (CL-ML), brown, moist, medium to stiff (ALLUVIUM) CLAYEY SAND (SC), trace Gravel, brown, moist, stiff (GLACIAL TILL) CLAYEY SAND (SC), trace Gravel, brown, moist, very stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, dark brown, moist, stiff to hard (GLACIAL TILL) Becoming gray at 19 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 2-4-5 (9) 16" 4-6-4 (10) 18" 3-3-4 (7) 17" 4-5-6 (11) 18" 5-9-10 (19) 17" 9-10-13 (23) 18" 6-6-7 (13) 18" 5-7-7 (14) 18" 9-9-9 (18) 18" qₚ tsf 3.75 2.25 2.5 MC % 30 24 Tests or Remarks LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-2 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181146.2 EASTING:559523.5 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/08/23 END DATE:09/08/23 SURFACE ELEVATION:973.9 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Concrete WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-2 page 1 of 2DRAFT Elev./ Depth ft 937.9 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, dark brown, moist, stiff to hard (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 10-13-20 (33) 0" qₚ tsf MC %Tests or Remarks No recovery Water not observed at end of drilling. Water not observed to cave-in depth of 29.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-2 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181146.2 EASTING:559523.5 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/08/23 END DATE:09/08/23 SURFACE ELEVATION:973.9 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Concrete WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-2 page 2 of 2DRAFT Elev./ Depth ft 974.0 1.5 966.5 9.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 6 inches of concrete over 12 inches of apparent aggregate base CLAYEY SAND (SC), trace Gravel, brown, moist, stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) Becoming gray at 24 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 3-4-5 (9) 18" 3-5-5 (10) 18" 4-6-6 (12) 18" 4-4-7 (11) 18" 4-7-7 (14) 18" 4-7-7 (14) 18" 4-7-9 (16) 18" 4-6-6 (12) 18" 4-8-9 (17) 18" qₚ tsf 2.5 3 3 2.5 3.75 MC % 18 20 Tests or Remarks LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-3 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181142.1 EASTING:559673.1 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/08/23 END DATE:09/08/23 SURFACE ELEVATION:975.5 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Concrete WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-3 page 1 of 2DRAFT Elev./ Depth ft 939.5 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 4-6-7 (13) 17" qₚ tsf MC %Tests or Remarks Water not observed while drilling. Water not observed to cave-in depth of 30.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-3 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181142.1 EASTING:559673.1 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/08/23 END DATE:09/08/23 SURFACE ELEVATION:975.5 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Concrete WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-3 page 2 of 2DRAFT Elev./ Depth ft 970.6 0.8 964.4 7.0 962.4 9.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) LEAN CLAY (CL), trace roots, black, moist (TOPSOIL FILL) FILL: SANDY LEAN CLAY (CL), trace Gravel, brown to gray, moist Slightly organic at 5 feet CLAYEY SAND (SC), contains lenses of Silt, brown and gray, moist, stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, medium to very stiff (GLACIAL TILL) Becoming dark brown at 19 feet Becoming gray at 24 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 1-3-3 (6) 17" 3-4-4 (8) 18" 2-4-5 (9) 17" 3-4-4 (8) 18" 3-4-6 (10) 18" 3-5-6 (11) 18" 5-9-10 (19) 18" 4-6-7 (13) 18" 8-11-13 (24) 0" qₚ tsf 2.5 3 2.25 4 2.75 MC % 20 19 Tests or Remarks OC=5% LL=33, PL=18, PI=15 No recovery LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-4 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181048.2 EASTING:559374.4 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/06/23 END DATE:09/06/23 SURFACE ELEVATION:971.4 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Grass WEATHER:Cloudy B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-4 page 1 of 2DRAFT Elev./ Depth ft 935.4 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, medium to very stiff (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 5-8-10 (18) 18" qₚ tsf 3.25 MC %Tests or Remarks Water not observed while drilling. Water not observed to cave-in depth of 30.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-4 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181048.2 EASTING:559374.4 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/06/23 END DATE:09/06/23 SURFACE ELEVATION:971.4 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Grass WEATHER:Cloudy B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-4 page 2 of 2DRAFT Elev./ Depth ft 973.4 0.9 970.3 4.0 967.3 7.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) LEAN CLAY (CL), trace roots, black, moist (TOPSOIL FILL) FILL: SILTY SAND (SM), fine to medium- grained, trace Gravel, trace bituminous debris, brown, moist FILL: SANDY LEAN CLAY (CL), trace Gravel, dark brown, moist SANDY LEAN CLAY (CL), trace Gravel, brown, moist, medium to very stiff (GLACIAL TILL) Becoming gray at 26 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 2-3-3 (6) 16" 4-3-2 (5) 15" 3-4-5 (9) 17" 3-4-4 (8) 18" 4-6-7 (13) 18" 8-8-12 (20) 18" 15-13-11 (24) 1" 9-10-7 (17) 17" 12-8-10 (18) 18" qₚ tsf 3 2.25 3.25 MC % 20 19 Tests or Remarks No recovery LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-5 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181049.1 EASTING:559556.9 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/06/23 END DATE:09/06/23 SURFACE ELEVATION:974.3 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Grass WEATHER:Cloudy B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-5 page 1 of 2DRAFT Elev./ Depth ft 938.3 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, medium to very stiff (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 8-8-10 (18) 18" qₚ tsf 3 MC %Tests or Remarks Water not observed while drilling. Water not observed to cave-in depth of 30.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-5 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181049.1 EASTING:559556.9 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/06/23 END DATE:09/06/23 SURFACE ELEVATION:974.3 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Grass WEATHER:Cloudy B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-5 page 2 of 2DRAFT Elev./ Depth ft 972.2 1.8 970.0 4.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 6 inches of concrete over 16 inches of apparent aggregate base FILL: CLAYEY SAND (SC), trace Gravel, brown, moist SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) Becoming gray at 24 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 1-2-3 (5) 16" 3-5-6 (11) 18" 3-6-6 (12) 18" 3-6-7 (13) 18" 6-7-10 (17) 18" 5-8-10 (18) 18" 6-7-11 (18) 18" 3-6-6 (12) 18" 2-4-5 (9) 18" qₚ tsf 3.5 4.25 1.75 2 MC % 18 20 Tests or Remarks LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-6 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181048.1 EASTING:559687.4 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/07/23 END DATE:09/07/23 SURFACE ELEVATION:974.0 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Concrete WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-6 page 1 of 2DRAFT Elev./ Depth ft 938.0 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 4-6-8 (14) 18" qₚ tsf MC %Tests or Remarks Water not observed while drilling. Water not observed to cave-in depth of 31.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-6 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181048.1 EASTING:559687.4 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/07/23 END DATE:09/07/23 SURFACE ELEVATION:974.0 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Concrete WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-6 page 2 of 2DRAFT Elev./ Depth ft 965.9 1.3 963.2 4.0 960.2 7.0 943.2 24.0 939.2 28.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 5 inches of concrete over 10 inches of apparent aggregate base FILL: CLAYEY SAND (SC), trace Gravel, slightly organic, gray, moist CLAYEY SAND (SC), trace Gravel, brown, moist, medium (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) Becoming gray at 19 feet CLAYEY SAND (SC), trace Gravel, brown, moist, very stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, gray, moist, stiff (GLACIAL TILL) Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 1-4-4 (8) 17" 2-3-4 (7) 18" 4-5-7 (12) 18" 5-6-8 (14) 18" 6-8-11 (19) 18" 4-7-8 (15) 18" 5-6-8 (14) 18" 8-12-13 (25) 17" 4-6-8 (14) 18" qₚ tsf 2 3 4 4 2.5 1.75 3 MC % 17 17 Tests or Remarks Blow count influenced by rock in sampler LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-7 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180930.1 EASTING:559370.9 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/06/23 END DATE:09/06/23 SURFACE ELEVATION:967.2 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Concrete WEATHER:Cloudy B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-7 page 1 of 2DRAFT Elev./ Depth ft 933.2 34.0 931.2 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, gray, moist, stiff (GLACIAL TILL) POORLY GRADED SAND with SILT (SP-SM), fine to medium-grained, trace Gravel, brown, moist, dense (GLACIAL OUTWASH) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 6-17-17 (34) 18" qₚ tsf MC %Tests or Remarks Water not observed while drilling. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-7 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180930.1 EASTING:559370.9 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/06/23 END DATE:09/06/23 SURFACE ELEVATION:967.2 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Concrete WEATHER:Cloudy B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-7 page 2 of 2DRAFT Elev./ Depth ft 962.3 1.9 960.2 4.0 940.2 24.0 935.2 29.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 7 inches of bituminous over 16 inches of apparent aggregate base FILL: SANDY LEAN CLAY (CL), trace Gravel, brown, moist SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff (GLACIAL TILL) CLAYEY SAND (SC), trace Gravel, brown, moist, stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, gray, moist, very stiff (GLACIAL TILL) Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 1-3-4 (7) 17" 3-4-5 (9) 18" 4-5-7 (12) 18" 4-5-7 (12) 18" 4-6-7 (13) 18" 4-5-8 (13) 18" 4-5-7 (12) 18" 5-6-8 (14) 18" 9-10-11 (21) 18" qₚ tsf 2.25 3 3 3 3.25 3 3.5 MC % 20 19 Tests or Remarks LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-8 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180906.3 EASTING:559527.1 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/06/23 END DATE:09/06/23 SURFACE ELEVATION:964.2 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Blacktop WEATHER:Cloudy B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-8 page 1 of 2DRAFT Elev./ Depth ft 928.2 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, gray, moist, very stiff (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 5-7-9 (16) 18" qₚ tsf MC %Tests or Remarks Water not observed while drilling. Water observed at 17.0 feet with a cave-in depth of 28.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-8 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180906.3 EASTING:559527.1 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/06/23 END DATE:09/06/23 SURFACE ELEVATION:964.2 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Blacktop WEATHER:Cloudy B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-8 page 2 of 2DRAFT Elev./ Depth ft 964.0 1.3 961.3 4.0 958.3 7.0 953.3 12.0 951.3 14.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 4 inches of bituminous over 11 inches of apparent aggregate base FILL: CLAYEY SAND (SC), trace Gravel, brown, moist FILL: SANDY LEAN CLAY (CL), trace Gravel, brown, moist SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff (GLACIAL TILL) CLAYEY SAND (SC), trace Gravel, brown, moist, stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, very stiff to stiff (GLACIAL TILL) Becoming gray at 19 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 4-3-3 (6) 14" 3-2-4 (6) 12" 4-7-7 (14) 18" 4-7-8 (15) 18" 5-6-8 (14) 18" 4-6-8 (14) 18" 6-8-9 (17) 18" 3-5-6 (11) 18" 4-4-6 (10) 18" qₚ tsf 2.5 3.25 3.5 2.25 2.5 1.25 MC % 19 18 Tests or Remarks LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-9 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180909.1 EASTING:559654.7 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/05/23 END DATE:09/05/23 SURFACE ELEVATION:965.3 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Blacktop WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-9 page 1 of 2DRAFT Elev./ Depth ft 929.3 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, very stiff to stiff (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 3-5-7 (12) 18" qₚ tsf MC %Tests or Remarks Water not observed while drilling. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-9 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180909.1 EASTING:559654.7 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/05/23 END DATE:09/05/23 SURFACE ELEVATION:965.3 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Blacktop WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-9 page 2 of 2DRAFT Elev./ Depth ft 959.6 1.3 953.9 7.0 946.9 14.0 941.9 19.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) CLAYEY SAND (SC), trace Gravel, dark brown, moist (TOPSOIL FILL) FILL: LEAN CLAY (CL), trace Gravel, contains seams of black Clay, brown and gray, moist SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff (GLACIAL TILL) CLAYEY SAND (SC), trace Gravel, contains lenses of Sand, brown, moist, stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, gray, moist to wet, medium to very stiff (GLACIAL TILL) Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 4-7-11 (18) 18" 5-6-6 (12) 16" 3-4-5 (9) 18" 3-4-5 (9) 18" 4-5-5 (10) 18" 4-8-5 (13) 18" 3-4-4 (8) 18" 3-4-5 (9) 18" 3-5-7 (12) 6" qₚ tsf 2.25 2.75 MC % 11 20 Tests or Remarks OC=2% LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-10 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180653.8 EASTING:559804.2 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/01/23 END DATE:09/01/23 SURFACE ELEVATION:960.9 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Grass WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-10 page 1 of 2DRAFT Elev./ Depth ft 924.9 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, gray, moist to wet, medium to very stiff (GLACIAL TILL) With layer of SILTY SAND, wet at 35 feet END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 8-8-11 (19) 8" qₚ tsf MC %Tests or Remarks Water observed at 35.0 feet at end of drilling. Water not observed to cave-in depth of 27.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-10 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180653.8 EASTING:559804.2 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/01/23 END DATE:09/01/23 SURFACE ELEVATION:960.9 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Grass WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-10 page 2 of 2DRAFT Elev./ Depth ft 957.3 2.0 952.3 7.0 945.3 14.0 940.3 19.0 930.3 29.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SILTY SAND (SM), fine to medium-grained, with Gravel, dark brown, dry (TOPSOIL FILL) FILL: CLAYEY SAND (SC), trace Gravel, brown, dry SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) CLAYEY SAND (SC), trace Gravel, brown, moist, very stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, very stiff (GLACIAL TILL) Becoming gray at 24 feet SILTY SAND (SM), fine to medium-grained, trace Gravel, brown, moist, medium dense (GLACIAL TILL) Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 2-2-3 (5) 10" 1-1-2 (3) 2" 3-4-6 (10) 18" 3-4-6 (10) 18" 4-6-10 (16) 18" 4-6-11 (17) 18" 4-9-11 (20) 18" 5-7-11 (18) 18" 8-9-11 (20) 18" qₚ tsf 2.5 3 2.25 2 MC % 16 18 Tests or Remarks LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-11 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180656.9 EASTING:559921.2 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/01/23 END DATE:09/01/23 SURFACE ELEVATION:959.3 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Grass WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-11 page 1 of 2DRAFT Elev./ Depth ft 925.3 34.0 923.3 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SILTY SAND (SM), fine to medium-grained, trace Gravel, brown, moist, medium dense (GLACIAL TILL) SANDY SILT (ML), fine-grained, gray, wet, loose (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 2-4-5 (9) 18" qₚ tsf MC %Tests or Remarks Water not observed while drilling. Water not observed to cave-in depth of 13.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-11 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180656.9 EASTING:559921.2 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/01/23 END DATE:09/01/23 SURFACE ELEVATION:959.3 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Grass WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-11 page 2 of 2DRAFT Elev./ Depth ft 960.1 1.3 953.4 8.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 3 inches of bituminous over 12 inches of apparent aggregate base CLAYEY SAND (SC), trace Gravel, contains lenses of Silt, brown and gray, moist, medium to stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) Becoming gray at 12 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 1-3-4 (7) 18" 4-4-5 (9) 17" 3-4-5 (9) 18" 4-7-10 (17) 18" 5-8-11 (19) 18" 4-7-9 (16) 18" 4-8-9 (17) 18" 4-7-8 (15) 18" 3-6-7 (13) 18" qₚ tsf 2.25 3.25 2.5 2.75 2.75 2 MC % 27 20 Tests or Remarks LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-12 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180798.0 EASTING:559794.6 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/05/23 END DATE:09/05/23 SURFACE ELEVATION:961.4 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Blacktop WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-12 page 1 of 2DRAFT Elev./ Depth ft 927.4 34.0 925.4 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) LEAN CLAY (CL), contains lenses of Silt, gray, moist, very stiff (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 8-8-10 (18) 18" qₚ tsf MC %Tests or Remarks Water not observed while drilling. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-12 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180798.0 EASTING:559794.6 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/05/23 END DATE:09/05/23 SURFACE ELEVATION:961.4 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Blacktop WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-12 page 2 of 2DRAFT Elev./ Depth ft 962.2 2.0 960.2 4.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 12 inches of bituminous over 12 inches of apparent aggregate base FILL: SANDY LEAN CLAY (CL), trace Gravel, slightly organic, gray, moist SANDY LEAN CLAY (CL), trace Gravel, brown, moist, medium to stiff (GLACIAL TILL) Becoming gray at 19 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 2-4-4 (8) 17" 3-3-4 (7) 18" 4-4-5 (9) 18" 3-4-4 (8) 18" 4-4-7 (11) 18" 4-6-9 (15) 18" 4-7-8 (15) 18" 4-5-6 (11) 18" 5-6-7 (13) 2" qₚ tsf 2 2 2.25 3.25 2.25 2.5 2.75 MC % 20 19 Tests or Remarks LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-13 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180824.7 EASTING:559928.8 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/06/23 END DATE:09/06/23 SURFACE ELEVATION:964.2 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Blacktop WEATHER:Cloudy B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-13 page 1 of 2DRAFT Elev./ Depth ft 928.2 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, medium to stiff (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 4-6-7 (13) 18" qₚ tsf MC %Tests or Remarks Water not observed while drilling. Water not observed to cave-in depth of 29.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-13 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180824.7 EASTING:559928.8 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/06/23 END DATE:09/06/23 SURFACE ELEVATION:964.2 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Blacktop WEATHER:Cloudy B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-13 page 2 of 2DRAFT Elev./ Depth ft 962.8 1.3 962.1 2.0 960.1 4.0 955.1 9.0 952.1 12.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 4 inches of bituminous over 11 inches of apparent aggregate base FILL: SANDY LEAN CLAY (CL), trace Gravel, brown, moist CLAYEY SAND (SC), trace Gravel, brown, moist, stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff (GLACIAL TILL) CLAYEY SAND (SC), trace Gravel, brown, moist, stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) Becoming gray at 18 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 3-4-6 (10) 17" 5-6-7 (13) 18" 5-6-8 (14) 0" 5-7-8 (15) 17" 4-6-8 (14) 18" 4-6-9 (15) 18" 5-7-9 (16) 18" 6-13-14 (27) 17" 6-8-10 (18) 3" qₚ tsf 2.25 4 2.25 MC % 19 18 Tests or Remarks Blow count influenced by rock in sampler LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-14 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180891.8 EASTING:559794.9 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/05/23 END DATE:09/05/23 SURFACE ELEVATION:964.1 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Blacktop WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-14 page 1 of 2DRAFT Elev./ Depth ft 928.1 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 4-6-9 (15) 17" qₚ tsf MC %Tests or Remarks Water not observed while drilling. Water observed at 3.0 feet with a cave-in depth of 22.0 feet when rechecked 12 hours after drilling. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-14 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180891.8 EASTING:559794.9 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/05/23 END DATE:09/05/23 SURFACE ELEVATION:964.1 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Blacktop WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-14 page 2 of 2DRAFT Elev./ Depth ft 968.8 1.7 966.5 4.0 961.5 9.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 7 inches of bituminous over 13 inches of apparent aggregate base FILL: CLAYEY SAND (SC), trace Gravel, brown, moist FILL: SANDY LEAN CLAY (CL), trace Gravel, brown, moist SANDY LEAN CLAY (CL), trace Gravel, brown, moist, medium to very stiff (GLACIAL TILL) Becoming gray at 19 feet With SILTY SAND layers at 20 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 4-5-8 (13) 17" 2-3-4 (7) 18" 5-7-6 (13) 18" 5-3-4 (7) 18" 3-4-6 (10) 18" 4-7-8 (15) 18" 4-7-9 (16) 18" 3-5-7 (12) 18" 5-6-8 (14) 14" qₚ tsf 2 2.5 3.25 3.25 MC % 25 19 Tests or Remarks LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-15 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180935.1 EASTING:559926.2 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/07/23 END DATE:09/07/23 SURFACE ELEVATION:970.5 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Blacktop WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-15 page 1 of 2DRAFT Elev./ Depth ft 934.5 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, medium to very stiff (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 3-5-6 (11) 18" qₚ tsf 2.25 MC %Tests or Remarks Water not observed while drilling. Water not observed to cave-in depth of 29.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-15 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:180935.1 EASTING:559926.2 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/07/23 END DATE:09/07/23 SURFACE ELEVATION:970.5 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Blacktop WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-15 page 2 of 2DRAFT Elev./ Depth ft 973.2 1.5 970.7 4.0 967.7 7.0 962.7 12.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 5 inches of bituminous over 13 inches of apparent aggregate base FILL: LEAN CLAY (CL), slightly organic, black, moist FILL: SILTY SAND (SM), fine to medium- grained, trace Gravel, brown, moist SANDY LEAN CLAY (CL), trace Gravel, brown, moist, medium (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to hard (GLACIAL TILL) Becoming gray at 24 feet COBBLE layer at 30 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 2-2-3 (5) 17" 4-5-5 (10) 17" 2-3-3 (6) 18" 3-3-4 (7) 18" 4-7-7 (14) 18" 4-7-8 (15) 18" 4-7-10 (17) 18" 4-6-7 (13) 18" 5-6-50/3" (REF) 15" qₚ tsf 1.5 2.75 2.5 3.5 2.5 MC % 9 26 Tests or Remarks P200=15% Blow count influenced by Cobble LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-16 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181043.1 EASTING:559768.5 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/08/23 END DATE:09/08/23 SURFACE ELEVATION:974.7 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Concrete WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-16 page 1 of 2DRAFT Elev./ Depth ft 938.7 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to hard (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 3-6-7 (13) 18" qₚ tsf MC %Tests or Remarks Water not observed while drilling. Water not observed to cave-in depth of 28.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-16 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181043.1 EASTING:559768.5 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/08/23 END DATE:09/08/23 SURFACE ELEVATION:974.7 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Concrete WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-16 page 2 of 2DRAFT Elev./ Depth ft 972.7 1.3 970.0 4.0 960.0 14.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SILTY SAND (SM), fine-grained, trace roots, dark brown, dry (TOPSOIL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, medium (GLACIAL TILL) CLAYEY SAND (SC), trace Gravel, brown, moist, stiff (GLACIAL TILL) With layers of SAND at 10 feet SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to hard (GLACIAL TILL) Becoming dark brown at 19 feet Becoming gray at 24 feet With COBBLE layer at 30 feet Continued on next page 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 2-4-4 (8) 17" 4-6-6 (12) 18" 3-4-5 (9) 18" 5-6-8 (14) 18" 3-4-6 (10) 17" 3-4-5 (9) 18" 6-8-11 (19) 18" 5-8-10 (18) 18" 50/6" (REF) 1" qₚ tsf 2.25 4 2.5 MC % 18 28 Tests or Remarks No recovery, blow count influenced by Cobbles LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-17 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181036.9 EASTING:559894.5 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/07/23 END DATE:09/07/23 SURFACE ELEVATION:974.0 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Grass WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-17 page 1 of 2DRAFT Elev./ Depth ft 938.0 36.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, stiff to hard (GLACIAL TILL) END OF BORING Boring then grouted 35 40 45 50 55 60 SampleBlows (N-Value) Recovery 26-10-11 (21) 17" qₚ tsf MC %Tests or Remarks Water not observed while drilling. Water not observed to cave-in depth of 28.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-17 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181036.9 EASTING:559894.5 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/07/23 END DATE:09/07/23 SURFACE ELEVATION:974.0 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Grass WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-17 page 2 of 2DRAFT Elev./ Depth ft 975.2 1.3 969.5 7.0 962.5 14.0 955.5 21.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 4 inches of concrete over 11 inches of apparent aggregate base FILL: CLAYEY SAND (SC), trace Gravel, contains seams of black Clay, brown, moist CLAYEY SAND (SC), trace Gravel, brown, moist, stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, very stiff to stiff (GLACIAL TILL) Becoming gray at 19 feet END OF BORING Boring then grouted 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 3-4-4 (8) 17" 4-4-4 (8) 0" 4-5-6 (11) 18" 4-5-6 (11) 18" 5-6-7 (13) 18" 5-7-9 (16) 18" 5-6-7 (13) 18" qₚ tsf MC % 16 18 Tests or Remarks No recovery Chemical-like odor noted between 7 and 14 feet Water not observed while drilling. Water not observed to cave-in depth of 17.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-18 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181129.2 EASTING:559808.1 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/08/23 END DATE:09/08/23 SURFACE ELEVATION:976.5 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Concrete WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-18 page 1 of 1DRAFT Elev./ Depth ft 974.2 1.4 971.6 4.0 963.6 12.0 954.6 21.0 WaterLevelDescription of Materials (Soil-ASTM D2488 or 2487; Rock-USACE EM 1110-1-2908) PAVEMENT, 4 inches of concrete over 13 inches of apparent aggregate base FILL: SANDY LEAN CLAY (CL), trace Gravel, brown, moist CLAYEY SAND (SC), trace Gravel, brown, moist, stiff to very stiff (GLACIAL TILL) SANDY LEAN CLAY (CL), trace Gravel, brown, moist, very stiff to stiff (GLACIAL TILL) Becoming gray at 19 feet END OF BORING Boring then grouted 5 10 15 20 25 30 SampleBlows (N-Value) Recovery 2-3-4 (7) 16" 4-4-7 (11) 18" 4-7-8 (15) 18" 5-11-11 (22) 18" 5-8-9 (17) 18" 5-8-10 (18) 18" 4-7-7 (14) 18" qₚ tsf MC % 22 18 Tests or Remarks Water not observed while drilling. Water not observed to cave-in depth of 18.0 feet immediately after withdrawal of auger. LOG OF BORING See Descriptive Terminology sheet for explanation of abbreviations Project Number B2307983 Geotechnical Evaluation Chanhassen Multi-Family 591 W 78th Street Chanhassen, Minnesota BORING:ST-19 LOCATION: Captured with RTK GPS. DATUM:NAD 1983 HARN Adj MN Carver (US Feet) NORTHING:181126.2 EASTING:559892.0 DRILLER:S. Hull LOGGED BY:A. Schulzetenberg START DATE:09/08/23 END DATE:09/08/23 SURFACE ELEVATION:975.6 ft RIG:75011 METHOD:3 1/4" HSA SURFACING:Concrete WEATHER:Sunny B2307983 Braun Intertec Corporation Print Date:10/03/2023 ST-19 page 1 of 1DRAFT Descriptive Terminology of Soil Based on Standards ASTM D2487/2488 (Unified Soil Classification System) Group Symbol Group NameB Cu ≥ 4 and 1 ≤ Cc ≤ 3D GW Well‐graded gravelE Cu < 4 and/or (Cc < 1 or Cc > 3)D GP Poorly graded gravelE Fines classify as ML or MH GM Silty gravelE F G Fines Classify as CL or CH GC Clayey gravelE F G Cu ≥ 6 and 1 ≤ Cc ≤ 3D SW Well‐graded sandI Cu < 6 and/or (Cc < 1 or Cc > 3)D SP Poorly graded sandI Fines classify as ML or MH SM Silty sandF G I Fines classify as CL or CH SC Clayey sandF G I CL Lean clayK L M PI < 4 or plots below "A" lineJ ML SiltK L M Organic OL CH Fat clayK L M MH Elastic siltK L M Organic OH PT Peat Highly Organic Soils Silts and Clays (Liquid limit less than 50) Silts and Clays (Liquid limit 50 or more) Primarily organic matter, dark in color, and organic odor Inorganic Inorganic PI > 7 and plots on or above "A" lineJ PI plots on or above "A" line PI plots below "A" line Criteria for Assigning Group Symbols and Group Names Using Laboratory TestsA Soil Classification Coarse‐grained Soils (more than 50% retained on No. 200 sieve)Fine‐grained Soils (50% or more passes the No. 200 sieve) Sands (50% or more coarse fraction passes No. 4 sieve) Clean Gravels (Less than 5% finesC) Gravels with Fines (More than 12% finesC) Clean Sands (Less than 5% finesH) Sands with Fines (More than 12% finesH) Gravels (More than 50% of coarse fraction retained on No. 4 sieve) Liquid Limit − oven dried Liquid Limit − not dried <0.75 Organic clay K L M N Organic silt K L M O Liquid Limit − oven dried Liquid Limit − not dried <0.75 Organic clay K L M P Organic silt K L M Q ParticleSize Identification Boulders.............. over 12" Cobbles................ 3" to 12" Gravel Coarse............. 3/4" to 3" (19.00 mm to 75.00 mm) Fine................. No. 4 to 3/4" (4.75 mm to 19.00 mm) Sand Coarse.............. No. 10 to No. 4 (2.00 mm to 4.75 mm) Medium........... No. 40 to No. 10 (0.425 mm to 2.00 mm) Fine.................. No. 200 to No. 40 (0.075 mm to 0.425 mm) Silt........................ No. 200 (0.075 mm) to .005 mm Clay...................... < .005 mm Relative ProportionsL, M trace............................. 0 to 5% little.............................. 6 to 14% with.............................. ≥ 15% Inclusion Thicknesses lens............................... 0 to 1/8" seam............................. 1/8" to 1" layer.............................. over 1" Apparent Relative Density of Cohesionless Soils Very loose ..................... 0 to 4 BPF Loose ............................ 5 to 10 BPF Medium dense.............. 11 to 30 BPF Dense............................ 31 to 50 BPF Very dense.................... over 50 BPF A. Based on the material passing the 3‐inch (75‐mm) sieve. B. If field sample contained cobbles or boulders, or both, add "with cobbles or boulders, or both" to group name. C. Gravels with 5 to 12% fines require dual symbols: GW‐GM well‐graded gravel with silt GW‐GC well‐graded gravel with clay GP‐GM poorly graded gravel with silt GP‐GC poorly graded gravel with clay D. Cu = D60 / D10 Cc = 𝐷30 2 / ሺ𝐷10 𝑥 𝐷60) E. If soil contains ≥ 15% sand, add "with sand" to group name. F. If fines classify as CL‐ML, use dual symbol GC‐GM or SC‐SM. G. If fines are organic, add "with organic fines" to group name. H. Sands with 5 to 12% fines require dual symbols: SW‐SM well‐graded sand with silt SW‐SC well‐graded sand with clay SP‐SM poorly graded sand with silt SP‐SC poorly graded sand with clay I. If soil contains ≥ 15% gravel, add "with gravel" to group name. J. If Atterberg limits plot in hatched area, soil is CL‐ML, silty clay. K. If soil contains 15 to < 30% plus No. 200, add "with sand" or "with gravel", whichever is predominant. L. If soil contains ≥ 30% plus No. 200, predominantly sand, add “sandy” to group name. M. If soil contains ≥ 30% plus No. 200 predominantly gravel, add “gravelly” to group name. N. PI ≥ 4 and plots on or above “A” line. O. PI < 4 or plots below “A” line. P. PI plots on or above “A” line. Q. PI plots below “A” line. Laboratory Tests DD Dry density,pcf qp Pocket penetrometer strength, tsf WD Wet density, pcf qU Unconfined compression test, tsf P200 % Passing #200 sieve LL Liquid limit MC Moisture content, %PL Plastic limit OC Organic content, %PI Plasticity index Consistency of Blows Approximate Unconfined Cohesive Soils Per Foot Compressive Strength Very soft................... 0 to 1 BPF................... < 0.25 tsf Soft........................... 2 to 4 BPF................... 0.25 to 0.5 tsf Medium.................... 5to 8 BPF .................. 0.5 to 1 tsf Stiff........................... 9 to 15 BPF................. 1 to 2 tsf Very Stiff................... 16 to 30 BPF............... 2 to 4 tsf Hard.......................... over 30 BPF................ > 4 tsf Drilling Notes: Blows/N‐value: Blows indicatethe driving resistance recorded for each 6‐inch interval. The reported N‐value is the blows per foot recorded by summing the second and third interval in accordance with the Standard Penetration Test, ASTM D1586. PartialPenetration:If the sampler could not be driven through a full 6‐inch interval, the number of blows for that partial penetration is shown as #/x" (i.e. 50/2"). The N‐value is reported as "REF" indicating refusal. Recovery: Indicates the inches of sample recovered from the sampled interval. For a standard penetration test, full recovery is 18", and is 24" for a thinwall/shelby tube sample. WOH: Indicates the sampler penetrated soil under weight of hammer and rods alone; driving not required. WOR: Indicates the sampler penetrated soil under weight of rods alone; hammer weight and driving not required. Water Level: Indicates the water level measured by the drillers either while drilling ( ), at the end of drilling ( ), or at some time after drilling ( ). Moisture Content: Dry:Absence of moisture, dusty, dry to the touch. Moist: Damp but no visible water. Wet: Visible free water, usually soil is below water table. 5/2021 NPDES General Stormwater Permit for Construction Activity (MNR100001) AUTHORIZATION TO DISCHARGE STORMWATER ASSOCIATED WITH CONSTRUCTION ACTIVITY UNDER THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES)/ STATE DISPOSAL SYSTEM (SDS) PROGRAM MNR100001 Permittee: Multiple Project Name: Construction Stormwater General Permit Issuance date: August 1, 2023 Expiration date: July 31, 2028 The state of Minnesota, on behalf of its citizens through the Minnesota Pollution Control Agency (MPCA), authorizes the Permittee(s) named above seeking coverage under this general permit to discharge stormwater associated with construction activity to waters of the state of Minnesota in accordance with the requirements of this permit. The goal of this permit is to reduce pollutant levels in point source discharges and protect water quality in accordance with the U.S. Clean Water Act, Minnesota statutes and rules, and federal laws and regulations. This permit is effective on the issuance date identified above. This permit expires at midnight on the expiration date identified above. Signature: Ryan Anderson This document has been electronically signed. for the Minnesota Pollution Control Agency Ryan Anderson Manager Stormwater Section Municipal Division Permit application: Questions on this permit? Submit via MPCA e-Services at Contact e-Services at https://rsp.pca.state.mn.us/ 651-757-2728 or 844-828-0942 wq-strm2-81a Table of Contents Page 1.1 Permit Coverage ....................................................................................................................................................... 3 2.1 Prohibitions and Limitations of Coverage ................................................................................................................. 3 3.1 Application and Coverage Effective Date ................................................................................................................. 4 4.1 Termination of Coverage .......................................................................................................................................... 4 5.1 Stormwater Pollution Prevention Plan (SWPPP) Content ........................................................................................ 5 6.1 SWPPP Amendments ................................................................................................................................................ 6 7.1 BMP Selection and Stormwater Management ......................................................................................................... 6 8.1 Erosion Prevention Practices .................................................................................................................................... 7 9.1 Sediment Control Practices ....................................................................................................................................... 7 10.1 Dewatering and Basin Draining ................................................................................................................................. 8 11.1 Inspections and Maintenance ................................................................................................................................... 9 12.1 Pollution Prevention Management Measures ........................................................................................................ 10 13.1 Permit Termination Conditions ............................................................................................................................... 10 14.1 Temporary Sediment Basins ................................................................................................................................... 11 15.1 Permanent Stormwater Treatment System ............................................................................................................ 11 16.1 Infiltration Systems ................................................................................................................................................. 12 17.1 Filtration Systems .................................................................................................................................................... 13 18.1 Wet Sedimentation Basin ....................................................................................................................................... 14 19.1 Regional Wet Sedimentation Basins ....................................................................................................................... 14 20.1 SWPPP Availability .................................................................................................................................................. 14 21.1 Training Requirements ............................................................................................................................................ 14 22.1 Requirements for Discharges to Wetlands ............................................................................................................. 15 23.1 Additional Requirements for Discharges to Special (Prohibited, Restricted, Other) and Impaired Waters ........... 15 24.1 General Provisions .................................................................................................................................................. 17 25.1 Definitions ............................................................................................................................................................... 17 Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 3 of 20 1.1 Permit Coverage. [Minn. R. 7090] 1.2 This permit is required for construction activity that results in land disturbance of equal to or greater than one (1) acre or if a project is part of a common plan of development or sale that ultimately will disturb greater than one (1) acre, and authorizes, subject to the terms and conditions of this permit, the discharge of stormwater associated with construction activity. [Minn. R. 7090] 1.3 Construction activity covered by this permit cannot commence until coverage under this permit is effective as described in item 3.3 through 3.4 or, if applicable, until the Minnesota Pollution Control Agency (MPCA) has issued an individual National Pollutant Discharge Elimination System (NPDES)/State Disposal System (SDS) construction stormwater permit for the project. [Minn. R. 7090] 1.4 This permit covers all areas of the State of Minnesota except land wholly within the boundaries of a federally recognized Indian Reservation owned by a tribe or a tribal member or land held in trust by the federal government for a tribe or tribal member. [Minn. R. 7090] 1.5 Coverage under this permit is not required when all stormwater from construction activity is routed directly to and treated by a "treatment works," as defined in Minn. Stat. Section 115.01, subd. 21, operated under an individual NPDES/SDS permit with a Total Suspended Solids (TSS) effluent limit. [Minn. R. 7090] 1.6 This permit covers ongoing projects covered under any previous construction stormwater permit that are not complete on the issuance date of this permit. Permittees must either remain in compliance with the previous permit and terminate coverage within 18 months of the issuance date of this permit or comply with this permit, including updating the Stormwater Pollution Prevention Plan (SWPPP), within the 18-month period. Permittees of previously permitted projects are not required to incorporate any additional requirements regarding the permanent stormwater treatment system included in this reissued permit. [Minn. R. 7090] 1.7 Coverage for projects that extend beyond the expiration date of this permit remains effective for a grace period of 18 months. If Permittees cannot complete projects during the grace period, the MPCA will extend coverage under the next permit and permittees must comply with the requirements of the new permit including updating the SWPPP. Permittees are not required to follow changes to the permanent stormwater treatment section of the next permit. [Minn. R. 7090] 2.1 Prohibitions and Limitations of Coverage. [Minn. R. 7090] 2.2 The owner must develop a complete and accurate SWPPP that complies with item 5.2 prior to submitting the application for coverage and starting construction activity. Failure to prepare a SWPPP prior to submitting the application may result in permit revocation. [Minn. R. 7090] 2.3 This permit prohibits discharges of any material other than stormwater treated in compliance with this permit and discharges from dewatering or basin draining activities in accordance with Section 10. Prohibited discharges include, but are not limited to, wastewater from washout of concrete, stucco, paint, form release oils, curing compounds and other construction materials, fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance, soaps or solvents used in vehicle and equipment washing and maintenance, and other hazardous substances or wastes. [Minn. R. 7090] 2.4 This permit does not authorize stormwater discharges related to the placement of fill into waters of the state requiring local, state or federal authorizations (such as U.S. Army Corps of Engineers Section 404 permits, Minnesota Department of Natural Resources (DNR) Public Waters Work permits or local governmental unit (LGU) Wetland Conservation Act replacement plans or determinations). [Minn. R. 7090] 2.5 This permit does not authorize stormwater discharges associated with industrial activity except for construction activity. Permittees must obtain coverage for discharges associated with industrial activity under a separate NPDES/SDS permit once day-to-day operational activities commence even if construction is ongoing. [Minn. R. 7090] 2.6 This permit does not authorize discharges from non-point source agricultural and silvicultural activities excluded from NPDES permit requirements under 40 CFR pt. 122.3(e). [Minn. R. 7090] 2.7 This permit does not authorize stormwater discharges to Prohibited, Restricted, Special or Impaired waters unless permittees follow the additional stormwater requirements in Section 23. [Minn. R. 7090] 2.8 This permit does not replace or satisfy any environmental review requirements including those under the Minnesota Environmental Policy Act or the National Environmental Policy Act. The owner must verify completion of any environmental review required by law, including any required Environmental Assessment Work Sheets or Environmental Impact Statements, Federal environmental review, or other required review prior to applying for coverage under this permit. If any part of your common plan of development or sale requires environmental review, coverage under this permit cannot be Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 4 of 20 obtained until such environmental review is complete. [Minn. R. 7090] 2.9 This permit does not replace or satisfy any review requirements for discharges adversely impacting State or Federally designated endangered or threatened species or a designated critical habitat. The owner must comply with the National Historic Preservation Act and conduct all required review and coordination related to historic preservation, including significant anthropological sites and any burial sites, with the Minnesota Historic Preservation Officer. [Minn. R. 7090] 2.10 This permit does not authorize discharges to wetlands unless the permittee complies with the requirements in Section 22. Coverage under this permit cannot be issued until the requirements for wetland permits, decisions, other determinations, or the mitigative sequence required in section 22 have been finalized and documented. [Minn. R. 7050.0186] 3.1 Application and Coverage Effective Date. [Minn. R. 7090] 3.2 The owner and operator must submit a complete and accurate on-line application with the appropriate fee to the MPCA for each project that disturbs one (1) or more acres of land or for a common plan of development or sale that will ultimately disturb one (1) or more acres. [Minn. R. 7090] 3.3 For projects or common plans of development or sale that disturb less than 50 acres or do not discharge stormwater within 1 mile (aerial radius measurement) of a special or impaired water, permittees do not need to submit the SWPPP with the application. Permit coverage for these projects is effective upon application and completing the payment process. [Minn. R. 7090] 3.4 For certain projects or common plans of development or sale disturbing 50 acres or more, the complete SWPPP must be included with the application and submitted at least 30 days before the start of construction activity. This applies if there is a discharge point on the project within one mile (aerial radius measurement) of, and flows to, a special water listed in item 23.3 through 23.6 or an impaired water as described in item 23.7. Permit coverage for these projects is effective upon submitting the application and complete SWPPP, completing the payment process and receiving a determination from the MPCA that the review of the SWPPP is complete. The determination may take longer than 30 days if the SWPPP is incomplete. If the MPCA fails to contact the permittees within 30 days of application receipt, coverage is effective 30 days after completing the payment process. [Minn. R. 7090] 3.5 The application requires listing all persons meeting the definition of owner and operator as permittees. The owner is responsible for compliance with all terms and conditions of this permit. The operator is responsible for compliance with Sections 3, 4, 6-22, 24 and applicable requirements for construction activity in Section 23. [Minn. R. 7090] 3.6 Permittees will receive coverage notification in a manner determined by the MPCA. [Minn. R. 7090] 3.7 For construction projects where the owner or operator changes (e.g., an original developer sells portions of the property to various homebuilders or sells the entire site to a new owner), the current owner and the new owner or operator must submit a complete permit modification form provided by the MPCA. The current owner and the new owner or operator must submit the form prior to the new owner or operator commencing construction activity or no later than 30 days after taking ownership of the property. [Minn. R. 7090] 3.8 For construction projects where the owner or operator changes, the current owner must provide a SWPPP to the new owner and operator that specifically addresses the remaining construction activity. The new owner or operator can implement the original SWPPP, modify the SWPPP, or develop a new SWPPP. Permittees must ensure their activities do not render another party's erosion prevention and sediment control BMPs ineffective. [Minn. R. 7090] 4.1 Termination of Coverage. [Minn. R. 7090] 4.2 Permittees must submit a NOT within 30 days after all termination conditions listed in Section 13 are complete. [Minn. R. 7090] 4.3 Permittees must submit a NOT within 30 days after selling or otherwise legally transferring the entire site, including permit responsibility for roads (e.g., street sweeping) and stormwater infrastructure final clean out, or transferring portions of a site to another party. The permittees' coverage under this permit terminates at midnight on the submission date of the NOT. [Minn. R. 7090] 4.4 Permittees may terminate permit coverage prior to completion of all construction activity if they meet all of the following conditions: a. construction activity has ceased for at least 90 days; and b. at least 90 percent (by area) of all originally proposed construction activity has been completed and permanent cover has been established on those areas; and c. on areas where construction activity is not complete, permanent cover has been established; and d. the site complies with item 13.3 through 13.7. Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 5 of 20 After permit coverage is terminated under this item, any subsequent development on the remaining portions of the site will require permit coverage if the subsequent development itself or as part of the remaining common plan of development or sale will result in land disturbing activities of one (1) or more acres in size. [Minn. R. 7090] 4.5 Permittees may terminate coverage upon MPCA approval after submitting information documenting the owner cancelled the project. [Minn. R. 7090] 5.1 Stormwater Pollution Prevention Plan (SWPPP) Content. [Minn. R. 7090] 5.2 The owner must develop and implement a SWPPP. The SWPPP must include items 5.3 through 5.26. [Minn. R. 7090] 5.3 The SWPPP must incorporate specific Best Management Practices (BMP) used to comply with the requirements of this permit. [Minn. R. 7090] 5.4 The SWPPP must include a narrative describing the timing for installation of all erosion prevention and sediment control BMPs and a description of the permanent stormwater treatment systems. [Minn. R. 7090] 5.5 The SWPPP must include the location and type of all temporary and permanent erosion prevention and sediment control BMPs along with procedures used to establish additional temporary BMPs as necessary for the site conditions during construction. Standard details and/or specifications for BMPs must be included in the final plans and specifications for the project. [Minn. R. 7090] 5.6 The SWPPP must include the calculations and other information used for the design of temporary sediment basins and any of the permanent stormwater treatment systems required in Section 15. [Minn. R. 7090] 5.7 The SWPPP must include estimated quantities anticipated at the start of the project for the life of the project for all erosion prevention and sediment control BMPs (e.g., linear feet of silt fence or square feet of erosion control blanket). [Minn. R. 7090] 5.8 The SWPPP must include the number of acres of impervious surface for both pre- and post-construction. [Minn. R. 7090] 5.9 The SWPPP must include a site map with existing and final grades, including drainage area boundaries, directions of flow and all discharge points where stormwater is leaving the site or entering a surface water. The site map must indicate the areas of steep slopes. The site map must also include impervious surfaces, soil types and locations of potential pollutant- generating activities as identified in Section 12. [Minn. R. 7090] 5.10 The SWPPP must include a map of all surface waters, existing wetlands, and stormwater ponds or basins that can be identified on maps such as United States Geological Survey 7.5-minute quadrangle maps, the National Wetland Inventory map or equivalent maps and are within one mile (aerial radius measurement) from the project boundaries that will receive stormwater from the construction site, during or after construction. The SWPPP must identify if the surface waters are special or impaired waters. [Minn. R. 7090] 5.11 The SWPPP must include a site map showing construction activity areas that are adjacent to and drain to Public Waters for which the DNR has promulgated "work in water restrictions" during specified fish spawning time frames. [Minn. R. 7090] 5.12 Permittees must identify locations of 50' buffer zones as required in item 9.17 and 100' permanent buffer zones as required in item 23.11, on plan sheets in the SWPPP. [Minn. R. 7090] 5.13 If permittees determine compliance with the following requirements is infeasible, they must document the determination in the SWPPP: a. temporary sediment basins as described in Section 14; and b. for linear projects, if the permanent stormwater treatment system cannot be constructed within the right-of-way, a reasonable attempt must be made to obtain additional right-of-way (item 15.9); and c. buffer zones as described in item 9.17 and item 23.11. [Minn. R. 7090] 5.14 If permittees determine that a temporary sediment basin is infeasible as described in item 14.10, the SWPPP must describe the alternative BMPs used. [Minn. R. 7090] 5.15 Where systems cannot meet the full volume reduction requirement on-site, (e.g., the site has infiltration prohibitions, see item 16.14 through item 16.21) the permittee must document the reasons in the SWPPP. [Minn. R. 7090] 5.16 The SWPPP must include any stormwater mitigation measures proposed to be part of the final project in any environmental review document, endangered species review, archeological or other required local, state or federal review conducted for the project. For purposes of this permit, mitigation measures mean actions necessary to avoid, minimize, or mitigate for impacts related to erosion prevention, sediment control, the permanent stormwater treatment system, pollution prevention management measures and discharges associated with the project's construction activity. [Minn. R. 7090] Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 6 of 20 5.17 The SWPPP must describe the methods used for permanent cover of all exposed soil areas. [Minn. R. 7090] 5.18 Permittees must identify the locations of areas where construction will be phased to minimize the duration of exposed soil areas in the SWPPP. [Minn. R. 7090] 5.19 For projects with a discharge point on the project within one (1) mile (aerial radius measurement) of and which flows to an impaired water, permittees must identify the impaired water(s), and any United States Environmental Protection Agency (USEPA)-approved Total Maximum Daily Load (TMDL) for the pollutant(s) or stressor(s) described in item 23.7. Permittees' identification must include those TMDLs approved at any time prior to permit application submittal and are still in effect. [Minn. R. 7090] 5.20 Permittees must document in the SWPPP, all trained individuals identified in item 21.2. Documentation must include: a. names of personnel required to be trained; and b. dates of training and name of instructor(s) and entity providing training; and c. content of training course. If permittees do not know the names of the individuals at the time of application, the permittees must ensure they document training before construction activity commences. [Minn. R. 7090] 5.21 The SWPPP must identify a person knowledgeable and experienced in the application of erosion prevention and sediment control BMPs who will coordinate with all contractors, subcontractors, and operators on-site to oversee the implementation of the SWPPP. [Minn. R. 7090] 5.22 The SWPPP must describe any specific chemicals and chemical treatment systems used for enhancing the sedimentation process and how it achieves compliance with item 9.19. [Minn. R. 7090] 5.23 The SWPPP must identify the person(s), organizations, or entities responsible for long-term operation and maintenance of permanent stormwater treatment systems. [Minn. R. 7090] 5.24 The SWPPP must describe methods to minimize soil compaction and preserve topsoil. Minimizing soil compaction is not required where the function of a specific area dictates compaction. [Minn. R. 7090] 5.25 The SWPPP must include any site assessments for groundwater or soil contamination required in item 16.15. [Minn. R. 7090] 5.26 The SWPPP must account for the following factors in designing temporary erosion prevention and sediment control BMPs: a. the expected amount, frequency, intensity, and duration of precipitation; and b. the nature of stormwater runoff and run-on at the site, including factors such as expected flow from impervious surfaces, slopes, and site drainage features; and c. the stormwater volume, velocity, and peak flowrates to minimize discharge of pollutants in stormwater and to minimize channel and streambank erosion and scour in the immediate vicinity of discharge points; and d. the range of soil particle sizes expected to be present. [Minn. R. 7090] 6.1 SWPPP Amendments. [Minn. R. 7090] 6.2 One of the individuals described in item 21.2.a or item 21.2.b or another qualified individual must complete all SWPPP changes. Changes involving the use of a less stringent BMP must include a justification describing how the replacement BMP is effective for the site characteristics. [Minn. R. 7090] 6.3 Permittees must amend the SWPPP within 7 days to include additional or modified BMPs whenever there is a change in design, construction, operation, maintenance, weather or seasonal conditions having a significant effect on the discharge of pollutants to surface waters or groundwater. [Minn. R. 7090] 6.4 Permittees must amend the SWPPP within 7 days to include additional or modified BMPs whenever inspections or investigations by the site owner or operator, USEPA or MPCA officials indicate the SWPPP is not effective in eliminating or significantly minimizing the discharge of pollutants to surface waters or groundwater or the discharges are causing water quality standard exceedances (e.g., nuisance conditions as defined in Minn. R. 7050.0210, subp. 2) or the SWPPP is not consistent with the objectives of a USEPA approved TMDL. [Minn. R. 7050.0210] 7.1 BMP Selection and Stormwater Management. [Minn. R. 7090] 7.2 Permittees must select, install, and maintain the BMPs identified in the SWPPP and in this permit in an appropriate and functional manner and in accordance with relevant manufacturer specifications and accepted engineering practices to minimize the discharge of pollutants in stormwater from construction activities. Examples of stormwater management practices for this section include but are not limited to wet sedimentation basins, temporary depressions to hold Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 7 of 20 stormwater, stormwater routing, dikes, berms, pumping, and stormwater treatment BMPs. Permittees must phase and incorporate stormwater management principles as the construction progresses. Unless infeasible, temporary or permanent wet sedimentation basins (when required, see section 14 and 15) should be constructed as a first step in the process and stormwater routed to these. [Minn. R. 7090] 7.3 Permittees must not disturb more land (i.e., phasing) than can be effectively inspected and maintained in accordance with Section 11. [Minn. R. 7090] 7.4 If permittees will be using some type of erosion control netting on the site as part of the soil stabilization techniques, permittees are encouraged to use products that have been shown to minimize impacts on wildlife. The U.S. Fish & Wildlife Service recommends using types of netting practices that are considered "wildlife friendly," including those that use natural fiber or 100 percent biodegradable materials and that use a loose weave with a non-welded, movable jointed netting. Products that are not wildlife friendly include square plastic netting that are degradable (e.g., photodegradable, UV- degradable, oxo-degradable), netting made from polypropylene, nylon, polyethylene, or polyester. Other recommendations include removing the netting product when it is no longer needed. More information may be found at: https://www.fws.gov/initiative/protecting-wildlife/make-change-wildlife-friendly-erosion-control-products. There also may be State, Tribal, or local requirements about using wildlife friendly erosion control products. See Minnesota Department of Transportation requirements at: https://www.mndot.org/environment/erosion/rolled-erosion-prevention-products.html. [Minn. R. 7050] 8.1 Erosion Prevention Practices. [Minn. R. 7090] 8.2 Before work begins, permittees must delineate the location of areas not to be disturbed. [Minn. R. 7090] 8.3 Permittees must minimize the need for disturbance of portions of the project with steep slopes. When steep slopes must be disturbed, permittees must use techniques such as phasing and stabilization practices designed for steep slopes (e.g., slope draining and terracing). [Minn. R. 7090] 8.4 Permittees must stabilize all exposed soil areas, including stockpiles. Stabilization must be initiated immediately to limit soil erosion when construction activity has permanently or temporarily ceased on any portion of the site and will not resume for a period exceeding 14 calendar days (7 days for sites discharging to special or impaired waters, see section 24). Stabilization must be completed no later than 14 calendar days after the construction activity has ceased. Stabilization is not required on constructed base components of roads, parking lots and similar surfaces. Stabilization is not required on temporary stockpiles without significant silt, clay or organic components (e.g., clean aggregate stockpiles, demolition concrete stockpiles, sand stockpiles) but permittees must provide sediment controls at the base of the stockpile. [Minn. R. 7090] 8.5 For Public Waters that the Minnesota DNR has promulgated "work in water restrictions" during specified fish spawning time frames, permittees must complete stabilization of all exposed soil areas within 200 feet of the water's edge, and that drain to these waters, within 24 hours during the restriction period. [Minn. R. 7090] 8.6 Permittees must stabilize the normal wetted perimeter of the last 200 linear feet of temporary or permanent drainage ditches or swales that drain water from the site within 24 hours after connecting to a surface water or property edge. Permittees must complete stabilization of remaining portions of temporary or permanent ditches or swales within 14 calendar days (7 days for sites discharging to special or impaired waters, see section 24) after connecting to a surface water or property edge and construction in that portion of the ditch temporarily or permanently ceases. [Minn. R. 7090] 8.7 Temporary or permanent ditches or swales being used as a sediment containment system during construction (with properly designed rock-ditch checks, bio rolls, silt dikes, etc.) do not need to be stabilized. Permittees must stabilize these areas within 24 hours after their use as a sediment containment system ceases. [Minn. R. 7090] 8.8 Permittees must not use mulch, hydromulch, tackifier, polyacrylamide or similar erosion prevention practices within any portion of the normal wetted perimeter of a temporary or permanent drainage ditch or swale section with a continuous slope of greater than 2 percent. Examples of acceptable erosion prevention practices include blankets, poly, riprap, etc. [Minn. R. 7090] 8.9 Permittees must provide temporary or permanent energy dissipation at all pipe outlets within 24 hours after connection to a surface water or permanent stormwater treatment system. [Minn. R. 7090] 9.1 Sediment Control Practices. [Minn. R. 7090] 9.2 Permittees must establish sediment control BMPs on all downgradient perimeters of the site and downgradient areas of the site that drain to any surface water, including curb and gutter systems. Permittees must locate sediment control practices upgradient of any buffer zones. Permittees must install sediment control practices before any upgradient land-disturbing activities begin and must keep the sediment control practices in place until they establish permanent cover. [Minn. R. 7090] 9.3 If downgradient sediment controls are overloaded, based on frequent failure or excessive maintenance requirements, Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 8 of 20 permittees must install additional upgradient sediment control practices or redundant BMPs to eliminate the overloading and amend the SWPPP to identify these additional practices as required in item 6.3. [Minn. R. 7090] 9.4 Temporary or permanent drainage ditches and sediment basins designed as part of a sediment containment system (e.g., ditches with rock-check dams) require sediment control practices only as appropriate for site conditions. [Minn. R. 7090] 9.5 A floating silt curtain placed in the water is not a sediment control BMP to satisfy item 9.2 except when working on a shoreline or below the waterline. Immediately after the construction activity (e.g., installation of rip rap along the shoreline) in that area is complete, permittees must install an upland perimeter control practice if exposed soils still drain to a surface water. [Minn. R. 7090] 9.6 Permittees must re-install all sediment control practices adjusted or removed to accommodate short-term activities such as clearing or grubbing, or passage of vehicles, immediately after the short-term activity is completed. Permittees must re- install sediment control practices before the next precipitation event even if the short-term activity is not complete. [Minn. R. 7090] 9.7 Permittees must protect all storm drain inlets using appropriate BMPs during construction until they establish permanent cover on all areas with potential for discharging to the inlet. [Minn. R. 7090] 9.8 Permittees may remove inlet protection for a particular inlet if a specific safety concern (e.g. street flooding/freezing) is identified by the permittees or the jurisdictional authority (e.g., city/county/township/Minnesota Department of Transportation engineer). Permittees must document the need for removal in the SWPPP. [Minn. R. 7090] 9.9 Permittees must provide silt fence or other effective sediment controls at the base of stockpiles on the downgradient perimeter prior to the initiation of stockpiling. Sediment controls must be managed in accordance with section 9.6. [Minn. R. 7090] 9.10 Permittees must locate stockpiles outside of natural buffers or surface waters, including stormwater conveyances such as curb and gutter systems unless there is a bypass in place for the stormwater. [Minn. R. 7090] 9.11 Permittees must install a vehicle tracking BMP to minimize the track out of sediment from the construction site or onto paved roads within the site. [Minn. R. 7090] 9.12 Permittees must use street sweeping in addition to vehicle tracking BMPs if vehicle tracking BMPs alone are not adequate to prevent sediment tracking onto the street. [Minn. R. 7090] 9.13 Permittees must install temporary sediment basins as required in Section 14. [Minn. R. 7090] 9.14 In any areas of the site where final vegetative stabilization will occur, permittees must restrict vehicle and equipment use to minimize soil compaction. [Minn. R. 7090] 9.15 Permittees must preserve topsoil on the site, unless infeasible. [Minn. R. 7090] 9.16 Permittees must direct discharges from BMPs to vegetated areas unless infeasible. [Minn. R. 7090] 9.17 Permittees must preserve a 50-foot natural buffer or, if a buffer is infeasible on the site, provide redundant (double) perimeter sediment controls when a surface water is located within 50 feet of the project's earth disturbances and stormwater flows to the surface water. Permittees must install perimeter sediment controls at least 5 feet apart unless limited by lack of available space. Natural buffers are not required adjacent to road ditches, judicial ditches, county ditches, stormwater conveyance channels, storm drain inlets, and sediment basins. If preserving the buffer is infeasible, permittees must document the reasons in the SWPPP. Sheet piling and other impermeable barriers installed in a manner that retains all stormwater are considered redundant perimeter control. [Minn. R. 7090] 9.18 Any sediment control made of soil must be temporarily or permanently stabilized within 24 hours. [Minn. R. 7090] 9.19 Permittees must use polymers, flocculants, or other sedimentation treatment chemicals in accordance with accepted engineering practices, dosing specifications and sediment removal design specifications provided by the manufacturer or supplier. The permittees must use conventional erosion and sediment controls prior to chemical addition and must direct treated stormwater to a sediment control system for filtration or settlement of the floc prior to discharge. [Minn. R. 7090] 10.1 Dewatering and Basin Draining. [Minn. R. 7090] 10.2 Permittees must not cause nuisance conditions (see Minn. R. 7050.0210, subp. 2) in surface waters from dewatering and basin draining (e.g., pumped discharges, trench/ditch cuts for drainage) discharges. Permittees must discharge turbid or sediment-laden waters related to dewatering or basin draining to a sediment control (e.g. sediment trap or basin, filter bag) designed to prevent discharges with visual turbidity. To the extent feasible, use well-vegetated (e.g., grassy or wooded), upland areas of the site to infiltrate dewatering water before discharge. Permittees are prohibited from using receiving waters as part of the treatment area. Permittees must visually check and photograph the discharge at the beginning and at least once every 24 hours of operation to ensure adequate treatment has been obtained and nuisance conditions will not Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 9 of 20 result from the discharge. [Minn. R. 7050.0210] 10.3 If nuisance conditions result from the discharge, Permittees must cease dewatering immediately and corrective actions must occur before dewatering is resumed. Nuisance conditions includes, but is not limited to, a sediment plume in the discharge or the discharge appears cloudy, or opaque, or has a visible contrast, or has a visible oil film, or has aquatic habitat degradation that can be identified by an observer. [Minn. R. 7050.0210] 10.4 If permittees must discharge water containing oil or grease, they must use an oil-water separator or suitable filtration device (e.g., cartridge filters, absorbents pads) prior to discharge. [Minn. R. 7090] 10.5 Permittees must discharge all water from dewatering or basin-draining activities in a manner that does not cause erosion or scour in the immediate vicinity of discharge points or inundation of wetlands in the immediate vicinity of discharge points that causes significant adverse impact to the wetland. [Minn. R. 7090] 10.6 If permittees use filters with backwash water, they must haul the backwash water away for disposal, return the backwash water to the beginning of the treatment process, or incorporate the backwash water into the site in a manner that does not cause erosion. [Minn. R. 7090] 11.1 Inspections and Maintenance. [Minn. R. 7090] 11.2 Permittees must ensure a trained person, as identified in item 21.2.b, will inspect the entire construction site at least once every seven (7) days during active construction and within 24 hours after a rainfall event greater than 1/2 inch in 24 hours. [Minn. R. 7090] 11.3 Permittees must inspect and maintain all permanent stormwater treatment BMPs. [Minn. R. 7090] 11.4 Permittees must inspect all erosion prevention and sediment control BMPs and Pollution Prevention Management Measures to ensure integrity and effectiveness. Permittees must repair, replace or supplement all nonfunctional BMPs with functional BMPs by the end of the next business day after discovery unless another time frame is specified in item 11.5 or 11.6. Permittees may take additional time if field conditions prevent access to the area. [Minn. R. 7090] 11.5 During each inspection, permittees must inspect areas adjacent to the project, surface waters, including drainage ditches and conveyance systems but not curb and gutter systems, for evidence of erosion and sediment deposition. Permittees must remove all deltas and sediment deposited in areas adjacent to the project, surface waters, including drainage ways, catch basins, and other drainage systems and restabilize the areas where sediment removal results in exposed soil. Permittees must complete removal and stabilization within seven (7) calendar days of discovery unless precluded by legal, regulatory, or physical access constraints. Permittees must use all reasonable efforts to obtain access. If precluded, removal and stabilization must take place within seven (7) days of obtaining access. Permittees are responsible for contacting all local, regional, state and federal authorities and receiving any applicable permits, prior to conducting any work in surface waters. [Minn. R. 7090] 11.6 Permittees must inspect construction site vehicle exit locations, streets and curb and gutter systems within and adjacent to the project for sedimentation from erosion or tracked sediment from vehicles. Permittees must remove sediment from all paved surfaces within one (1) calendar day of discovery or, if applicable, within a shorter time to avoid a safety hazard to users of public streets. [Minn. R. 7090] 11.7 Permittees must repair, replace or supplement all perimeter control devices when they become nonfunctional or the sediment reaches 1/2 of the height of the device. [Minn. R. 7090] 11.8 Permittees must drain temporary and permanent sedimentation basins and remove the sediment when the depth of sediment collected in the basin reaches 1/2 the storage volume within 72 hours of discovery. [Minn. R. 7090] 11.9 Permittee's must inspect and photograph dewatering discharges at the beginning and at least once every 24 hours during operation. Dewatering discharges that only last for minutes, as opposed to hours, and do not reach a surface water, do not require photographs or documentation. [Minn. R. 7090] 11.10 Permittees must ensure that at least one individual present on the site (or available to the project site in three (3) calendar days) is trained in the job duties described in item 21.2.b. [Minn. R. 7090] 11.11 Permittees may adjust the inspection schedule described in item 11.2 as follows: a. inspections of areas with permanent cover can be reduced to once per month, even if construction activity continues on other portions of the site; or b. where sites have permanent cover on all exposed soil and no construction activity is occurring anywhere on the site, inspections can be reduced to once per month and, after 12 months, may be suspended completely until construction activity resumes. The MPCA may require inspections to resume if conditions warrant; or c. where construction activity has been suspended due to frozen ground conditions, inspections may be suspended. Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 10 of 20 Inspections must resume within 24 hours of runoff occurring, or upon resuming construction, whichever comes first. d. for projects where a pollinator habitat or native prairie type vegetated cover is being established, inspections may be reduced to once per month if the site has temporary vegetation with a density of 70% temporary uniform cover. If after 24 months no significant erosion problems are observed, inspections may be suspended completely until the termination requirements in section 13 have been met. [Minn. R. 7090] 11.12 Permittees must record all inspections and maintenance activities within 24 hours of being conducted and these records must be retained with the SWPPP. These records must include: a. date and time of inspections; and b. name of persons conducting inspections; and c. accurate findings of inspections, including the specific location where corrective actions are needed; and d. corrective actions taken (including dates, times, and party completing maintenance activities); and e. date of all rainfall events greater than 1/2 inches in 24 hours, and the amount of rainfall for each event. Permittees must obtain rainfall amounts by either a properly maintained rain gauge installed on-site, a weather station that is within one (1) mile of your location, or a weather reporting system that provides site specific rainfall data from radar summaries; and f. if permittees observe a discharge during the inspection, they must record and should photograph and describe the location of the discharge (i.e., color, odor, settled or suspended solids, oil sheen, and other obvious indicators of pollutants); and 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; and h. all photographs of dewatering activities and documentation of nuisance conditions resulting from dewatering activities as described in section 10. [Minn. R. 7090] 12.1 Pollution Prevention Management Measures. [Minn. R. 7090] 12.2 Permittees must place construction materials and landscape materials under cover (e.g., plastic sheeting or temporary roofs) or protect them by similarly effective means designed to minimize contact with stormwater. Permittees are not required to cover or protect products which are either not a source of contamination to stormwater or are designed to be exposed to stormwater. [Minn. R. 7090] 12.3 Permittees must place pesticides, fertilizers and treatment chemicals under cover (e.g., plastic sheeting or temporary roofs) or protect them by similarly effective means designed to minimize contact with stormwater. [Minn. R. 7090] 12.4 Permittees must store hazardous materials and toxic waste, (including oil, diesel fuel, gasoline, hydraulic fluids, paint solvents, petroleum-based products, wood preservatives, additives, curing compounds, and acids) in sealed containers to prevent spills, leaks or other discharge. Storage and disposal of hazardous waste materials must be in compliance with Minn. R. ch. 7045 including secondary containment as applicable. [Minn. R. 7090] 12.5 Permittees must properly store, collect and dispose solid waste in compliance with Minn. R. ch. 7035. [Minn. R. 7035] 12.6 Permittees must position portable toilets so they are secure and will not tip or be knocked over. Permittees must properly dispose sanitary waste in accordance with Minn. R. ch. 7041. [Minn. R. 7041] 12.7 Permittees must take reasonable steps to prevent the discharge of spilled or leaked chemicals, including fuel, from any area where chemicals or fuel will be loaded or unloaded including the use of drip pans or absorbents unless infeasible. Permittees must ensure adequate supplies are available at all times to clean up discharged materials and that an appropriate disposal method is available for recovered spilled materials. Permittees must report and clean up spills immediately as required by Minn. Stat. 115.061, using dry clean up measures where possible. [Minn. Stat. 115.061] 12.8 Permittees must limit vehicle exterior washing and equipment to a defined area of the site. Permittees must contain runoff from the washing area in a sediment basin or other similarly effective controls and must dispose waste from the washing activity properly. Permittees must properly use and store soaps, detergents, or solvents. [Minn. R. 7090] 12.9 Permittees must provide effective containment for all liquid and solid wastes generated by washout operations (e.g., concrete, stucco, paint, form release oils, curing compounds and other construction materials) related to the construction activity. Permittees must prevent liquid and solid washout wastes from contacting the ground and must design the containment so it does not result in runoff from the washout operations or areas. Permittees must properly dispose liquid and solid wastes in compliance with MPCA rules. Permittees must install a sign indicating the location of the washout facility. [Minn. R. 7035, Minn. R. 7090] 13.1 Permit Termination Conditions. [Minn. R. 7090] 13.2 Permittees must complete all construction activity and must install permanent cover over all areas prior to submitting the NOT. Vegetative cover must consist of a uniform perennial vegetation with a density of 70 percent of its expected final Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 11 of 20 growth. Vegetation is not required where the function of a specific area dictates no vegetation, such as impervious surfaces or the base of a sand filter. [Minn. R. 7090] 13.3 Permittees must clean the permanent stormwater treatment system of any accumulated sediment and must ensure the system meets all applicable requirements in Section 15 through 19 and is operating as designed. [Minn. R. 7090] 13.4 Permittees must remove all sediment from conveyance systems prior to submitting the NOT. [Minn. R. 7090] 13.5 Permittees must remove all temporary synthetic erosion prevention and sediment control BMPs prior to submitting the NOT. Permittees may leave BMPs designed to decompose on-site in place. [Minn. R. 7090] 13.6 For residential construction only, permit coverage terminates on individual lots if the lot is sold to the homeowner, structures are finished, and permanent cover has been established. For lots that are sold to the homeowner where permanent cover has not been established, coverage terminates if temporary erosion prevention and downgradient perimeter control is properly installed and the permittee distributes the MPCA's "Homeowner Fact Sheet" to the homeowner. [Minn. R. 7090] 13.7 For construction projects on agricultural land (e.g., pipelines across cropland), permittees must return the disturbed land to its preconstruction agricultural use prior to submitting the NOT. [Minn. R. 7090] 13.8 When submitting the NOT, Permittees must include either ground or aerial photographs showing the requirements of 13.2 have been met. Permittees are not required to take photographs of every distinct part of the site, however the conditions portrayed must be substantially similar to those areas that are not photographed. Photographs must be clear and in focus and must include the date the photo was taken. [Minn. R. 7090] 14.1 Temporary Sediment Basins. [Minn. R. 7090] 14.2 Where ten (10) or more acres of disturbed soil (5 acres for sites discharging to special or impaired waters, see section 24) drain to a common location, permittees must provide a temporary sediment basin to provide treatment of the runoff before it leaves the construction site or enters surface waters. Permittees may convert a temporary sediment basin to a permanent basin after construction is complete. The temporary basin is no longer required when permanent cover has reduced the acreage of disturbed soil to less than ten (10) acres draining to a common location. [Minn. R. 7090] 14.3 The temporary basin must provide live storage for a calculated volume of runoff from a two (2)-year, 24-hour storm from each acre drained to the basin or 1,800 cubic feet of live storage per acre drained, whichever is greater. [Minn. R. 7090] 14.4 Where permittees have not calculated the two (2)-year, 24-hour storm runoff amount, the temporary basin must provide 3,600 cubic feet of live storage per acre of the basins' drainage area. [Minn. R. 7090] 14.5 Permittees must design basin outlets to prevent short-circuiting and the discharge of floating debris. [Minn. R. 7090] 14.6 Permittees must design the outlet structure to withdraw water from the surface to minimize the discharge of pollutants. Permittees may temporarily suspend the use of a surface withdrawal mechanism during frozen conditions. The basin must include a stabilized emergency overflow to prevent failure of pond integrity. [Minn. R. 7090] 14.7 Permittees must provide energy dissipation for the basin outlet within 24 hours after connection to a surface water. [Minn. R. 7090] 14.8 Permittees must locate temporary basins outside of surface waters and any buffer zone required in item 23.11. [Minn. R. 7090] 14.9 Permittees must construct the temporary basins prior to disturbing 10 or more acres of soil draining to a common location. [Minn. R. 7090] 14.10 Where a temporary sediment basin meeting the requirements of item 14.3 through 14.9 is infeasible, permittees must install effective sediment controls such as smaller sediment basins and/or sediment traps, silt fences, vegetative buffer strips or any appropriate combination of measures as dictated by individual site conditions. In determining whether installing a sediment basin is infeasible, permittees must consider public safety and may consider factors such as site soils, slope, and available area on-site. Permittees must document this determination of infeasibility in the SWPPP. [Minn. R. 7090] 15.1 Permanent Stormwater Treatment System. [Minn. R. 7090] 15.2 Permittees must design and implement the project so all stormwater discharged from the project during and after construction activities does not cause a violation of state water quality standards, including nuisance conditions, erosion in receiving channels or on downslope properties, or a significant adverse impact to wetlands caused by inundation or decrease of flow. [Minn. R. 7090] 15.3 Permittees must design and construct a permanent stormwater treatment system to treat the water quality volume if the project's ultimate development replaces vegetation and/or other pervious surfaces creating a net increase of one (1) or Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 12 of 20 more acres of cumulative impervious surface. [Minn. R. 7090] 15.4 Permittees must calculate the water quality volume as one (1) inch times the net increase of impervious surfaces created by the project. [Minn. R. 7090] 15.5 Permittees must first consider volume reduction practices on-site (e.g., infiltration or other) when designing the permanent stormwater treatment system. If this permit prohibits infiltration as described in item 16.14 through item 16.21, permittees may consider a wet sedimentation basin, filtration basin or regional pond. This permit does not consider wet sedimentation basins and filtration systems to be volume reduction practices. [Minn. R. 7090] 15.6 For projects where the full volume reduction requirement cannot be met on-site, (e.g., the site has infiltration prohibitions), permittees must document the reasons in the SWPPP. [Minn. R. 7090] 15.7 Permittees must discharge the water quality volume to a permanent stormwater treatment system prior to discharge to a surface water. For purposes of this item, surface waters do not include man-made drainage systems that convey stormwater to a permanent stormwater treatment system. [Minn. R. 7090] 15.8 Where the proximity to bedrock precludes the installation of any of the permanent stormwater treatment practices required by Sections 15 through 19, permittees must install other treatment such as grassed swales, smaller ponds, or grit chambers, prior to the discharge of stormwater to surface waters. [Minn. R. 7090] 15.9 For linear projects where permittees cannot treat the entire water quality volume within the existing right-of-way, permittees must make a reasonable attempt to obtain additional right-of-way, easement or other permission for stormwater treatment during the project planning process. Documentation of these attempts must be in the SWPPP. Permittees must still consider volume reduction practices first as described in item 15.5. If permittees cannot obtain additional right-of-way, easement or other permission, they must maximize the treatment of the water quality volume prior to discharge to surface waters. [Minn. R. 7090] 16.1 Infiltration Systems. [Minn. R. 7090] 16.2 Infiltration options include, but are not limited to: infiltration basins, infiltration trenches, rainwater gardens, bioretention areas without underdrains, swales with impermeable check dams, and natural depressions. If permittees utilize an infiltration system to meet the requirements of this permit, they must incorporate the design parameters in item 16.3 through item 16.21. Permittees must follow the infiltration prohibition in item 16.14 anytime an infiltration system is designed, including those not required by this permit. [Minn. R. 7090] 16.3 Permittees must design infiltration systems such that pre-existing hydrologic conditions of wetlands in the vicinity are not impacted (e.g., inundation or breaching a perched water table supporting a wetland). [Minn. R. 7090] 16.4 Permittees must not excavate infiltration systems to final grade, or within three (3) feet of final grade, until the contributing drainage area has been constructed and fully stabilized unless they provide rigorous erosion prevention and sediment controls (e.g., diversion berms) to keep sediment and runoff completely away from the infiltration area. [Minn. R. 7090] 16.5 When excavating an infiltration system to within three (3) feet of final grade, permittees must stake off and mark the area so heavy construction vehicles or equipment do not compact the soil in the infiltration area. [Minn. R. 7090] 16.6 Permittees must use a pretreatment device such as a vegetated filter strip, forebay, or water quality inlet (e.g., grit chamber) to remove solids, floating materials, and oil and grease from the runoff, to the maximum extent practicable, before the system routes stormwater to the infiltration system. [Minn. R. 7090] 16.7 Permittees must design infiltration systems to provide a water quality volume (calculated as an instantaneous volume) of one (1) inch of runoff, or one (1) inch minus the volume of stormwater treated by another system on the site, from the net increase of impervious surfaces created by the project. [Minn. R. 7090] 16.8 Permittees must design the infiltration system to discharge all stormwater (including stormwater in excess of the water quality volume) routed to the system through the uppermost soil surface or engineered media surface within 48 hours. Permittees must route additional flows that cannot infiltrate within 48 hours to bypass the system through a stabilized discharge point. [Minn. R. 7090] 16.9 Permittees must provide a means to visually verify the infiltration system is discharging through the soil surface or filter media surface within 48 hours or less. [Minn. R. 7090] 16.10 Permittees must provide at least one soil boring, test pit or infiltrometer test in the location of the infiltration practice for determining infiltration rates. [Minn. R. 7090] 16.11 For design purposes, permittees must divide field measured infiltration rates by 2 as a safety factor or permittees can use soil-boring results with the infiltration rate chart in the Minnesota Stormwater Manual to determine design infiltration rates. When soil borings indicate type A soils, permittees should perform field measurements to verify the rate is not above Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 13 of 20 8.3 inches per hour. This permit prohibits infiltration if the field measured infiltration rate is above 8.3 inches per hour. [Minn. R. 7090] 16.12 Permittees must employ appropriate on-site testing to ensure a minimum of three (3) feet of separation from the seasonally saturated soils (or from bedrock) and the bottom of the proposed infiltration system. [Minn. R. 7090] 16.13 Permittees must design a maintenance access, typically eight (8) feet wide, for the infiltration system. [Minn. R. 7090] 16.14 This permit prohibits permittees from constructing infiltration systems that receive runoff from vehicle fueling and maintenance areas including construction of infiltration systems not required by this permit. [Minn. R. 7090] 16.15 This permit prohibits permittees from constructing infiltration systems where infiltrating stormwater may mobilize high levels of contaminants in soil or groundwater. Permittees must either complete the MPCA's contamination screening checklist or conduct their own assessment to determine the suitability for infiltration. Permittees must retain the checklist or assessment with the SWPPP. For more information and to access the MPCA's "contamination screening checklist" see the Minnesota Stormwater Manual. [Minn. R. 7090] 16.16 This permit prohibits permittees from constructing infiltration systems in areas where soil infiltration rates are field measured at more than 8.3 inches per hour unless they amend soils to slow the infiltration rate below 8.3 inches per hour. [Minn. R. 7090] 16.17 This permit prohibits permittees from constructing infiltration systems in areas with less than three (3) feet of separation distance from the bottom of the infiltration system to the elevation of the seasonally saturated soils or the top of bedrock. [Minn. R. 7090] 16.18 This permit prohibits permittees from constructing infiltration systems in areas of predominately Hydrologic Soil Group type D soils (clay). [Minn. R. 7090] 16.19 This permit prohibits permittees from constructing infiltration systems within a Drinking Water Supply Management Area (DWSMA) as defined in Minn. R. 4720.5100, subp. 13, if the system will be located: a. in an Emergency Response Area (ERA) within a DWSMA classified as having high or very high vulnerability as defined by the Minnesota Department of Health; or b. in an ERA within a DWSMA classified as moderate vulnerability unless a regulated MS4 Permittee performed or approved a higher level of engineering review sufficient to provide a functioning treatment system and to prevent adverse impacts to groundwater; or c. outside of an ERA within a DWSMA classified as having high or very high vulnerability, unless a regulated MS4 Permittee performed or approved a higher level of engineering review sufficient to provide a functioning treatment system and to prevent adverse impacts to groundwater. See "higher level of engineering review" in the Minnesota Stormwater Manual for more information. [Minn. R. 7090] 16.20 This permit prohibits permittees from constructing infiltration systems in areas within 1,000 feet upgradient or 100 feet downgradient of active karst features. [Minn. R. 7090] 16.21 This permit prohibits permittees from constructing infiltration systems in areas that receive runoff from the following industrial facilities not authorized to infiltrate stormwater under the NPDES stormwater permit for industrial activities: wood preserving facilities; automobile salvage yards; scrap recycling and waste recycling facilities; hazardous waste treatment, storage, or disposal facilities; or air transportation facilities that conduct deicing activities. [Minn. R. 7090] 17.1 Filtration Systems. [Minn. R. 7090] 17.2 Filtration options include but are not limited to: sand filters with underdrains, biofiltration areas, swales using underdrains with impermeable check dams and underground sand filters. If permittees utilize a filtration system to meet the permanent stormwater treatment requirements of this permit, they must comply with items 17.3 through 17.11. [Minn. R. 7090] 17.3 Permittees must not install filter media until they construct and fully stabilize the contributing drainage area unless they provide rigorous erosion prevention and sediment controls (e.g., diversion berms) to keep sediment and runoff completely away from the filtration area. [Minn. R. 7090] 17.4 Permittees must design filtration systems to remove at least 80 percent of TSS. [Minn. R. 7090] 17.5 Permittees must use a pretreatment device such as a vegetated filter strip, small sedimentation basin, water quality inlet, forebay or hydrodynamic separator to remove settleable solids, floating materials, and oils and grease from the runoff, to the maximum extent practicable, before runoff enters the filtration system. [Minn. R. 7090] Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 14 of 20 17.6 Permittees must design filtration systems to treat a water quality volume (calculated as an instantaneous volume) of one (1) inch of runoff, or one (1) inch minus the volume of stormwater treated by another system on the site, from the net increase of impervious surfaces created by the project. [Minn. R. 7090] 17.7 Permittees must design the filtration system to discharge all stormwater (including stormwater in excess of the water quality volume) routed to the system through the uppermost soil surface or engineered media surface within 48 hours. Additional flows that the system cannot filter within 48 hours must bypass the system or discharge through an emergency overflow. [Minn. R. 7090] 17.8 Permittees must design the filtration system to provide a means to visually verify the system is discharging through the soil surface or filter media within 48 hours. [Minn. R. 7090] 17.9 Permittees must employ appropriate on-site testing to ensure a minimum of three (3) feet of separation between the seasonally saturated soils (or from bedrock) and the bottom of the proposed filtration system. [Minn. R. 7090] 17.10 Permittees must ensure that filtration systems with less than three (3) feet of separation between seasonally saturated soils or from bedrock are constructed with an impermeable liner. [Minn. R. 7090] 17.11 The permittees must design a maintenance access, typically eight (8) feet wide, for the filtration system. [Minn. R. 7090] 18.1 Wet Sedimentation Basin. [Minn. R. 7090] 18.2 Permittees using a wet sedimentation basin to meet the permanent stormwater treatment requirements of this permit must incorporate the design parameters in item 18.3 through 18.10. [Minn. R. 7090] 18.3 Permittees must design the basin to have a permanent volume of 1,800 cubic feet of storage below the outlet pipe for each acre that drains to the basin. The basin's permanent volume must reach a minimum depth of at least three (3) feet and must have no depth greater than 10 feet. Permittees must configure the basin to minimize scour or resuspension of solids. [Minn. R. 7090] 18.4 Permittees must design the basin to provide live storage for a water quality volume (calculated as an instantaneous volume) of one (1) inch of runoff, or one (1) inch minus the volume of stormwater treated by another system on the site, from the net increase in impervious surfaces created by the project. [Minn. R. 7090] 18.5 Permittees must design basin outlets so the water quality volume discharges at no more than 5.66 cubic feet per second (cfs) per acre of surface area of the basin. [Minn. R. 7090] 18.6 Permittees must design basin outlets to prevent short-circuiting and the discharge of floating debris. Basin outlets must have energy dissipation. [Minn. R. 7090] 18.7 Permittees must design the basin to include a stabilized emergency overflow to accommodate storm events in excess of the basin's hydraulic design. [Minn. R. 7090] 18.8 Permittees must design a maintenance access, typically eight (8) feet wide, for the basin. [Minn. R. 7090] 18.9 Permittees must locate basins outside of surface waters and any buffer zone required in item 23.11. Permittees must design basins to avoid draining water from wetlands unless the impact to the wetland complies with the requirements of Section 22. [Minn. R. 7090] 18.10 Permittees must design basins using an impermeable liner if located within active karst terrain. [Minn. R. 7090] 19.1 Regional Wet Sedimentation Basins. [Minn. R. 7090] 19.2 When the entire water quality volume cannot be treated by volume reduction practices on-site, permittees can use or create regional wet sedimentation basins provided they are constructed basins, not a natural wetland or water body, (wetlands used as regional basins must be mitigated for, see Section 22). The owner must ensure the regional basin conforms to all requirements for a wet sedimentation basin as described in items 18.3 through 18.10 and must be large enough to account for the entire area that drains to the regional basin. Permittees must verify that the regional basin will discharge at no more than 5.66 cfs per acre of surface area of the basin and must provide a live storage volume of one-inch times all the impervious area draining to the basin. Permittees cannot significantly degrade waterways between the project and the regional basin. The owner must obtain written authorization from the applicable LGU or private entity that owns and maintains the regional basin. [Minn. R. 7090] 20.1 SWPPP Availability. [Minn. R. 7090] 20.2 Permittees must keep the SWPPP on-site, or electronically available on-site, during normal working hours with personnel who have operational control over the applicable portion of the site, including all changes to the SWPPP, inspections, and maintenance records. [Minn. R. 7090] 21.1 Training Requirements. [Minn. R. 7090] Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 15 of 20 21.2 Permittees must ensure all of the following individuals receive training and the content and extent of the training is commensurate with the individual's job duties and responsibilities with regard to activities covered under this permit: a. Individuals preparing the SWPPP for the project. b. Individuals overseeing implementation of, revising and/or amending the SWPPP and individuals performing inspections for the project. One of these individuals must be available for an on-site inspection within 72 hours upon request by the MPCA. c. Individuals performing or supervising the installation, maintenance and repair of BMPs. [Minn. R. 7090] 21.3 Permittees must ensure individuals identified in Section 21 receive training from local, state, federal agencies, professional organizations, or other entities with expertise in erosion prevention, sediment control, permanent stormwater treatment and the Minnesota NPDES/SDS Construction Stormwater permit. Permittees must ensure these individuals attend a refresher-training course every three (3) years. [Minn. R. 7090] 22.1 Requirements for Discharges to Wetlands. [Minn. R. 7050.0186] 22.2 If the project has any discharges with the potential for significant adverse impacts to a wetland, (e.g., conversion of a natural wetland to a stormwater pond) permittees must demonstrate that the wetland mitigative sequence has been followed in accordance with items 22.3 or 22.4. [Minn. R. 7050.0186] 22.3 If the potential adverse impacts to a wetland on a specific project site are addressed by permits or other approvals from an official statewide program (U.S. Army Corps of Engineers 404 program, Minnesota Department of Natural Resources, or the State of Minnesota Wetland Conservation Act) that are issued specifically for the project and project site, permittees may use the permit, decision or other determination issued by these agencies to show the potential adverse impacts are addressed. For purposes of this permit, deminimus actions are determinations by the permitting agency that address the project impacts, whereas a non-jurisdictional determination does not address project impacts. [Minn. R. 7090] 22.4 If there are impacts from the project not addressed in one of the permits, decisions or other determinations discussed in item 22.3 (e.g., permanent inundation or flooding of the wetland, significant degradation of water quality, excavation, filling, draining), permittees must minimize all adverse impacts to wetlands by utilizing appropriate measures. Permittees must use measures based on the nature of the wetland, its vegetative community types and the established hydrology. These measures include in order of preference: a. avoid all significant adverse impacts to wetlands from the project and post-project discharge; b. minimize any unavoidable impacts from the project and post-project discharge; c. provide compensatory mitigation when the permittees determine(s) that there is no reasonable and practicable alternative to having a significant adverse impact on a wetland. For compensatory mitigation, wetland restoration or creation must be of the same type, size and whenever reasonable and practicable in the same watershed as the impacted wetland. [Minn. R. 7050.0186] 23.1 Additional Requirements for Discharges to Special (Prohibited, Restricted, Other) and Impaired Waters. [Minn. R. 7090] 23.2 The BMPs identified for each special or impaired water are required for those areas of the project draining to a discharge point on the project that is within one mile (aerial radius measurement) of special or impaired water and flows to that special or impaired water. [Minn. R. 7090] 23.3 Discharges to the following special waters identified as Prohibited in Minn. R. 7050.0335 subp. 3 must incorporate the BMPs outlined in items 23.9, 23.10, 23.11, 23.13 and 23.14: a. Boundary Waters Canoe Area Wilderness; Voyageurs National Park; Kettle River from the site of the former dam at Sandstone to its confluence with the Saint Croix River; Rum River from Ogechie Lake spillway to the northernmost confluence with Lake Onamia. b. Those portions of Lake Superior North of latitude 47 degrees, 57 minutes, 13 seconds, East of Hat Point, South of the Minnesota-Ontario boundary, and West of the Minnesota-Michigan boundary; c. Scientific and Natural Areas identified as in Minn. R. 7050.0335 Subp. 3: Boot Lake, Anoka County; Kettle River in sections 15, 22, 23, T 41 N, R 20, Pine County; Pennington Bog, Beltrami County; Purvis Lake-Ober Foundation, Saint Louis County; waters within the borders of Itasca Wilderness Sanctuary, Clearwater County; Iron Springs Bog, Clearwater County; Wolsfeld Woods, Hennepin County; Green Water Lake, Becker County; Blackdog Preserve, Dakota County; Prairie Bush Clover, Jackson County; Black Lake Bog, Pine County; Pembina Trail Preserve, Polk County; and Falls Creek, Washington County. [Minn. R. 7050.0335, subp. 3] 23.4 Discharges to the following special waters identified as Restricted in Minn. R. 7050.0335 subp.1 must incorporate the BMPs Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 16 of 20 outlined in items 23.9, 23.10 and 23.11: a. Lake Superior, except those portions identified as prohibited in item 23.3.b; b. Mississippi River in those portions from Lake Itasca to the southerly boundary of Morrison County that are included in the Mississippi Headwaters Board comprehensive plan dated February 12, 1981; c. Scenic or Recreational River Segments: Saint Croix River, entire length; Cannon River from northern city limits of Faribault to its confluence with the Mississippi River; North Fork of the Crow River from Lake Koronis outlet to the Meeker-Wright county line; Kettle River from north Pine County line to the site of the former dam at Sandstone; Minnesota River from Lac que Parle dam to Redwood County State Aid Highway 11; Mississippi River from County State Aid Highway 7 bridge in Saint Cloud to northwestern city limits of Anoka; and Rum River from State Highway 27 bridge in Onamia to Madison and Rice streets in Anoka; d. Lake Trout Lakes identified in Minn. R. 7050.0335 including lake trout lakes inside the boundaries of the Boundary Waters Canoe Area Wilderness and Voyageurs National Park; e. Calcareous Fens listed in Minn. R. 7050.0335, subp. 1. [Minn. R. 7050.0335, subp. 1] 23.5 Discharges to the Trout Lakes (other special water) identified in Minn. R. 6264.0050, subp. 2 and Minn. R. 7050.0420 must incorporate the BMPs outlined in items 23.9, 23.10 and 23.11. [Minn. R. 6264.0050, subp. 2, Minn. R. 7050] 23.6 Discharges to the Trout Streams (other special water) listed in Minn. R. 6264.0050, subp. 4 and Minn. R. 7050.0420 must incorporate the BMPs outlined in items 23.9, 23.10, 23.11 and 23.12. [Minn. R. 6264.0050, subp. 4, Minn. R. 7050] 23.7 Discharges to impaired waters or a water with an USEPA approved TMDL for any of the impairments listed in this item must incorporate the BMPs outlined in items 23.9 and 23.10. Impaired waters are waters identified as impaired under section 303 (d) of the federal Clean Water Act for phosphorus (nutrient eutrophication biological indicators, nutrients), turbidity, TSS, dissolved oxygen or aquatic biota (fish bioassessment, aquatic plant bioassessment and aquatic macroinvertebrate bioassessment, benthic macroinvertebrate bioassessment). Terms used for the pollutants or stressors in this item are subject to change. [Minn. R. 7090] 23.8 Where the additional BMPs in this Section conflict with requirements elsewhere in this permit, items 23.9 through 23.14 take precedence. [Minn. R. 7090] 23.9 Permittees must immediately initiate stabilization of exposed soil areas, as described in item 8.5 & 8.8, and complete the stabilization within seven (7) calendar days after the construction activity in that portion of the site temporarily or permanently ceases. [Minn. R. 7090] 23.10 Permittees must provide a temporary sediment basin as described in Section 14 for common drainage locations that serve an area with five (5) or more acres disturbed at one time. [Minn. R. 7090] 23.11 Permittees must include an undisturbed buffer zone of not less than 100 linear feet from a special water (not including tributaries) and must maintain this buffer zone at all times, both during construction and as a permanent feature post construction, except where a water crossing or other encroachment is necessary to complete the project. Permittees must fully document the circumstance and reasons the buffer encroachment is necessary in the SWPPP and include restoration activities. This permit allows replacement of existing impervious surface within the buffer. Permittees must minimize all potential water quality, scenic and other environmental impacts of these exceptions by the use of additional or redundant (double) BMPs and must document this in the SWPPP for the project. [Minn. R. 7090] 23.12 Permittees must design the permanent stormwater treatment system so the discharge from the project minimizes any increase in the temperature of trout streams resulting from the one (1) and two (2) year 24-hour precipitation events. This includes all tributaries of designated trout streams located within the same Public Land Survey System (PLSS) Section. Permittees must incorporate one or more of the following measures, in order of preference: a. Provide stormwater infiltration or other volume reduction practices as described in item 15.4 and 15.5, to reduce runoff. Infiltration systems must discharge all stormwater routed to the system within 24 hours. b. Provide stormwater filtration as described in Section 17. Filtration systems must discharge all stormwater routed to the system within 24 hours. c. Minimize the discharge from connected impervious surfaces by discharging to vegetated areas, or grass swales, and through the use of other non-structural controls. d. If ponding is used, the design must include an appropriate combination of measures such as shading, vegetated swale discharges or constructed wetland treatment cells that limit temperature increases. The pond must be designed as a dry pond and should draw down in 24 hours or less. e. Other methods that minimize any increase in the temperature of the trout stream. [Minn. R. 7090] Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 17 of 20 23.13 Permittees must conduct routine site inspections once every three (3) days as described in item 11.2 for projects that discharge to prohibited waters. [Minn. R. 7090] 23.14 If discharges to prohibited waters cannot provide volume reduction equal to one (1) inch times the net increase of impervious surfaces as required in item 15.4 and 15.5, permittees must develop a permanent stormwater treatment system design that will result in no net increase of TSS or phosphorus to the prohibited water. Permittees must keep the plan in the SWPPP for the project. [Minn. R. 7090] 24.1 General Provisions. [Minn. R. 7090] 24.2 If the MPCA determines that an individual permit would more appropriately regulate the construction activity, the MPCA may require an individual permit to continue the construction activity. Coverage under this general permit will remain in effect until the MPCA issues an individual permit. [Minn. R. 7001.0210, subp. 6] 24.3 If the permittee cannot meet the terms and conditions of this general permit, an owner may request an individual permit, in accordance with Minn. R. 7001.0210 subp. 6. [Minn. R. 7001.0210, subp. 6] 24.4 Any interested person may petition the MPCA to require an individual NPDES/SDS permit in accordance with 40 CFR 122.28(b)(3). [40 CFR 122.28(b)(3)] 24.5 In addition to the requirement found in section 20, permittees must make the SWPPP, including all inspection reports, maintenance records, training records and other information required by this permit, available to federal, state, and local officials within three (3) days upon request for the duration of the permit and for three (3) years following the NOT. [Minn. R. 7090] 24.6 Permittees may not assign or transfer this permit except when the transfer occurs in accordance with the applicable requirements of item 3.7 and 3.8. [Minn. R. 7090] 24.7 Nothing in this permit must be construed to relieve the permittees from civil or criminal penalties for noncompliance with the terms and conditions provided herein. Nothing in this permit must be construed to preclude the initiation of any legal action or relieve the permittees from any responsibilities, liabilities, or penalties to which the permittees is/are or may be subject to under Section 311 of the Clean Water Act and Minn. Stat. Section 115 and 116, as amended. Permittees are not liable for permit requirements for activities occurring on those portions of a site where the permit has been transferred to another party as required in item 3.7 or the permittees have submitted the NOT as required in Section 4. [Minn. R. 7090] 24.8 The provisions of this permit are severable. If any provision of this permit or the application of any provision of this permit to any circumstances is held invalid, the application of such provision to other circumstances, and the remainder of this permit must not be affected thereby. [Minn. R. 7090] 24.9 The permittees must comply with the provisions of Minn. R. 7001.0150, subp. 3 and Minn. R. 7001.1090, subp. 1(A), 1(B), 1(C), 1(H), 1(I), 1(J), 1(K), and 1(L). [Minn. R. 7001] 24.10 The permittees must allow access as provided in 40 CFR 122.41(i) and Minn. Stat. Section 115.04. The permittees must allow representatives of the MPCA or any member, employee or agent thereof, when authorized by it, upon presentation of credentials, to enter upon any property, public or private, for the purpose of obtaining information or examination of records or conducting surveys or investigations. [40 CFR 122.41(i)] 24.11 For the purposes of Minn. R. 7090 and other documents that reference specific sections of this permit, "Stormwater Discharge Design Requirements" corresponds to Sections 5, 6 and 14 through 21; "Construction Activity Requirements" corresponds to Sections 7 through 13; and "Appendix A" corresponds to Sections 22 and 23. [Minn. R. 7090] 25.1 Definitions. [Minn. R. 7090] 25.2 "Active karst" means a terrain having distinctive landforms and hydrology created primarily from the dissolution of soluble rocks within 50 feet of the land surface. [Minn. R. 7090] 25.3 "Aerial radius measurement" means the shortest straight line distance measurement between the point of stormwater discharge from a project construction site to the nearest edge of the water body receiving the stormwater. This measurement does not follow the meander flow path. [Minn. R. 7090] 25.4 "Best Management Practices (BMPs)" means the most effective and practicable means of erosion prevention and sediment control, and water quality management practices that are the most effective and practicable means of to control, prevent, and minimize degradation of surface water, including avoidance of impacts, construction-phasing, minimizing the length of time soil areas are exposed, prohibitions, pollution prevention through good housekeeping, and other management practices published by state or designated area-wide planning agencies. [Minn. R. 7090] 25.5 "Common Plan of Development or Sale" means one proposed plan for a contiguous area where multiple separate and distinct land-disturbing activities may be taking place at different times, on different schedules, but under one proposed Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 18 of 20 plan. One plan is broadly defined to include design, permit application, advertisement or physical demarcation indicating that land-disturbing activities may occur. [Minn. R. 7090] 25.6 "Construction Activity" means activities including clearing, grading, and excavating, that result in land disturbance of equal to or greater than one acre, including the disturbance of less than one acre of total land area that is part of a larger common plan of development or sale if the larger common plan will ultimately disturb equal to or greater than one acre. This includes a disturbance to the land that results in a change in the topography, existing soil cover, both vegetative and nonvegetative, or the existing soil topography that may result in accelerated stormwater runoff that may lead to soil erosion and movement of sediment. Construction activity does not include a disturbance to the land of less than five acres for the purpose of routine maintenance performed to maintain the original line and grade, hydraulic capacity, and original purpose of the facility. Routine maintenance does not include activities such as repairs, replacement and other types of non-routine maintenance. Pavement rehabilitation that does not disturb the underlying soils (e.g., mill and overlay projects) is not construction activity. [Minn. R. 7090] 25.7 "Dewatering" means the removal of surface or ground water to dry and/or solidify a construction site to enable construction activity. Dewatering may require a Minnesota Department of Natural Resources water appropriation permit and, if dewatering water is contaminated, discharge of such water may require an individual MPCA NPDES/SDS permit. [Minn. R. 7090] 25.8 "Energy Dissipation" means methods employed at pipe outlets to prevent erosion caused by the rapid discharge of water scouring soils. [Minn. R. 7090] 25.9 "Erosion Prevention" means measures employed to prevent erosion such as soil stabilization practices, permanent cover or construction phasing. [Minn. R. 7090] 25.10 "General Contractor" means the party who signs the construction contract with the owner to construct the entire project described in the final plans and specifications. Where the construction project involves more than one contractor, the general contractor is the party responsible for managing the entire project on behalf of the owner. In some cases, the owner is the general contractor. In these cases, the owner signs the permit application as the operator and becomes the sole permittee. [Minn. R. 7090] 25.11 "Groundwater" means the water contained below the surface of the earth in the saturated zone including, without limitation, all waters whether under confined, unconfined, or perched conditions, in near surface unconsolidated sediment or regolith, or in rock formations deeper underground. [Minn. R. 7060] 25.12 "Homeowner Fact Sheet" means an MPCA fact sheet available on the MPCA Construction Stormwater website for permittees to give to homeowners at the time of sale. [Minn. R. 7090] 25.13 "Infeasible" means not technologically possible or not economically practicable and achievable in light of the best industry practices. [Minn. R. 7090] 25.14 "Initiated immediately" means taking an action to commence soil stabilization as soon as practicable, but no later than the end of the workday, following the day when the land-disturbing activities temporarily or permanently cease, if the permittees know that construction work on that portion of the site will be temporarily ceased for 14 or more additional calendar days or 7 calendar days where item 23.9 applies. Permittees can initiate stabilization by: a. prepping the soil for vegetative or non-vegetative stabilization; or b. applying mulch or other non-vegetative product to the exposed soil area; or c. seeding or planting the exposed area; or d. starting any of the activities in a - c on a portion of the area to be stabilized, but not on the entire area; or e. finalizing arrangements to have stabilization product fully installed in compliance with the applicable deadline for completing stabilization. [Minn. R. 7090] 25.15 "Impervious Surface" means a constructed hard surface that either prevents or retards the entry of water into the soil and causes water to run off the surface in greater quantities and at an increased rate of flow than prior to development. Examples include rooftops, driveways, parking lots, and concrete, asphalt, or gravel roads. Bridges over surface waters are considered impervious surfaces. Recreational trails that are distinctly set apart from a roadway (i.e. not parallel) and intended for non-motorized recreational uses are not considered impervious surfaces. Sidewalks that are parallel to a roadway (or generally following alongside a roadway) must still be included as impervious surfaces. [Minn. R. 7090] 25.16 "National Pollutant Discharge Elimination System (NPDES)" means the program for issuing, modifying, revoking, reissuing, terminating, monitoring, and enforcing permits under the Clean Water Act, as amended (33 U.S.C. 1251 et seq. Section 1342 and 40 CFR parts 122, 123, 124 and 450). [Minn. R. 7001.1020] 25.17 "Natural Buffer" means an area of undisturbed cover surrounding surface waters within which construction activities are Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 19 of 20 restricted. Natural buffer includes the vegetation, exposed rock, or barren ground that exists prior to commencement of earth-disturbing activities. [Minn. R. 7090] 25.18 "Normal Wetted Perimeter" means the area of a conveyance, such as a ditch or channel, that is in contact with water during flow events that are expected to occur from a two-year, 24-hour storm event. [Minn. R. 7090] 25.19 "Notice of Termination (NOT)" means the form (electronic or paper) required for terminating coverage under the Construction General permit. [Minn. R. 7090] 25.20 "Operator" means the person (usually the general contractor), firm, governmental agency, or other entity designated by the owner who has day to day operational control and/or the ability to modify project plans and specifications related to the SWPPP. The permit application must list the operator as a permittee. Subcontractors hired by and under supervision of the general contractor are not operators. [Minn. R. 7090] 25.21 "Owner" means the person, firm, governmental agency, or other entity possessing the title of the land on which the construction activities will occur or, if the construction activity is for a lease, easement, or mineral rights license holder, the party or individual identified as the lease, easement or mineral rights license holder; or the contracting government agency responsible for the construction activity. [Minn. R. 7090] 25.22 "Permanent Cover" means surface types that will prevent soil failure under erosive conditions. Examples include: gravel, concrete, perennial cover, or other landscaped material that will permanently arrest soil erosion. Permittees must establish a uniform perennial vegetative cover (i.e., evenly distributed, without large bare areas) with a density of 70 percent of the vegetative cover native to local undisturbed areas on all areas not covered by permanent structures, or equivalent permanent stabilization measures. Permanent cover does not include temporary BMPs such as wood fiber blanket, mulch, and rolled erosion control products. [Minn. R. 7090] 25.23 "Permittee(s)" means the person(s), firm, governmental agency, or other entity identified as the owner and operator on the application submitted to the MPCA and are responsible for compliance with the terms and conditions of this permit. [Minn. R. 7090] 25.24 "Project(s)" means all construction activity planned and/or conducted under a particular permit. The project occurs on the site or sites described in the permit application, the SWPPP and in the associated plans, specifications and contract documents. [Minn. R. 7090] 25.25 "Public Waters" means all water basins and watercourses described in Minn. Stat. Section 103G.005 subd. 15. [Minn. Stat. 103G.005, subd.15] 25.26 "Redoximorphic Features" means a color pattern in soil, formed by oxidation and reduction process of iron and/or manganese in seasonally saturated soil. [Minn. R. 7090] 25.27 "Section" includes all item numbers of the same whole number. For example, "Section 3" of the permit refers to items 3.1 through 3.8. [Minn. R. 7090] 25.28 "Seasonally Saturated Soil" means the highest seasonal elevation in the soil in a reduced chemical state because of soil voids filled with water causing anaerobic conditions. Seasonally saturated soil is evidenced by the presence of redoximorphic features or other information determined by scientifically established methods or empirical field measurements. [Minn. R. 7090] 25.29 "Sediment Control" means methods employed to prevent suspended sediment in stormwater from leaving the site (e.g. silt fences, compost logs and storm drain inlet protection). [Minn. R. 7090] 25.30 "Stabilize", "Stabilized", "Stabilization" means the exposed ground surface has been covered by appropriate materials such as mulch, staked sod, riprap, erosion control blanket, mats or other material that prevents erosion from occurring. Grass seeding, agricultural crop seeding or other seeding alone is not stabilization. Mulch materials must achieve approximately 90 percent ground coverage (typically 2 ton/acre). [Minn. R. 7090] 25.31 "Stormwater" means precipitation runoff, stormwater runoff, snowmelt runoff, and any other surface runoff and drainage. [Minn. R. 7090] 25.32 "Steep Slopes" means slopes that are 1:3 (V:H) (33.3 percent) or steeper in grade. [Minn. R. 7090] 25.33 "Storm Water Pollution Prevention Plan (SWPPP)" means a plan for stormwater discharge that includes all required content under in Section 5 that describes the erosion prevention, sediment control and waste control BMPs and permanent stormwater treatment systems. [Minn. R. 7090] 25.34 "Surface Water or Waters" means all streams, lakes, ponds, marshes, wetlands, reservoirs, springs, rivers, drainage systems, waterways, watercourses, and irrigation systems whether natural or artificial, public or private, except that surface waters do not include stormwater treatment systems constructed from upland. This permit does not consider stormwater Permit issued: August 1, 2023 MNR100001 Permit expires: July 31, 2028 Page 20 of 20 treatment systems constructed in wetlands and mitigated in accordance with Section 22 as surface waters. [Minn. R. 7090] 25.35 "Waters of the State" means all streams, lakes, ponds, marshes, watercourses, waterways, wells, springs, reservoirs, aquifers, irrigation systems, drainage systems and all other bodies or accumulations of water, surface or underground, natural or artificial, public or private, which are contained within, flow through, or border upon the state or any portion thereof. [Minn. Stat. 115.01, subd. 22] 25.36 "Water Quality Volume" means one (1) inch of runoff from the net increase in impervious surfaces created by the project (calculated as an instantaneous volume). [Minn. R. 7090] 25.37 "Wetlands" means those areas that are inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support, and under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas. Constructed wetlands designed for wastewater treatment are not waters of the state. Wetlands must have the following attributes: a. a predominance of hydric soils; and b. inundated or saturated by surface water or groundwater at a frequency and duration sufficient to support a prevalence of hydrophytic vegetation typically adapted for life in a saturated soil condition; and c. under normal circumstances support a prevalence of such vegetation. [Minn. R. 7050.0186, subp. 1(a)B] MPCA & EPA Concrete Washout Guidance www.pca.state.mn.us Minnesota Pollution Control Agency 651-296-6300 | 800-657-3864 | TTY 651-282-5332 or 800-657-3864 December 2013 | wq-strm2-24 Available in alternative formats Concrete, paint, stucco and other washout guidance National Pollutant Discharge Elimination System/State Disposal System Construction Stormwater Permit requirements Use this guidance for managing all liquid and solid wastes generated by washout operations (concrete, stucco, paint, form release oils, curing compounds, and other construction materials) related to construction activity on National Pollutant Discharge Elimination System/State Disposal System (NPDES/SDS) construction stormwater permitted sites. To protect water quality, the NPDES Construction Stormwater Permit requires best management practices (BMPs) for concrete and other washout wastes on construction sites. Background The chutes of concrete mixers and hoppers of concrete pumps are typically rinsed out after delivery of concrete. Tools, hand mixers and wheel barrows are also washed to prevent hardening. Hardened concrete is relatively benign. However, liquid concrete wash water is a caustic material due to a high pH and it contains hazardous metals such as chromium. These materials can leach into the ground and contaminate groundwater. The high pH can inhibit plant growth and harm aquatic life if the runoff migrates to a lake or stream. Solids from liquid waste that are improperly disposed of can clog storm drain pipes and cause flooding. In order to comply with the prohibition of discharging any materials other than treated stormwater, there must be a means to prevent the discharge of washout water from the cleanup of stucco, paint, form release oils, curing compounds, and other construction materials. The Minnesota Pollution Control Agency (MPCA) believes that groundwater and surface water can be protected from liquid concrete and other washout wastes through proper use of BMPs at NPDES/SDS construction stormwater permitted sites. Installing washout facilities not only prevents pollution but also is a matter of good housekeeping at a construction site. Washout at construction sites Washout facilities are used to contain all concrete and liquid wash water generated by the construction activity. Liquid and solid washout wastes must be contained in a leak-proof container and cannot contact the ground. The washout containers should be covered to prevent exposure to rainfall and potential overflow. Washout facilities should also be used for cleaning other cementitious (cement-like) construction materials from tools and equipment such as stucco, mortar, plaster and grout. Depositing the wash water into a container allows evaporation and hardening to occur for easier disposal and to prevent runoff of liquids. While the Construction Stormwater Permit does not allow concrete chute rinse water to come into contact with the ground, the permit does allow the wasting, the end of the load of plastic structural concrete to come into contact with the ground. After drying, Recover and recycle wash water back into the truck Page 2 of 4 December 2013 | wq-strm2-24 the remaining solids may be used as a fill material, a component in recycled aggregate or any other commercially useful application. Up to 0.5 cubic yards of concrete solids may be managed/buried on- site. If concrete solids are buried on-site, they should be at least two feet below the surface and must not be buried within three feet of the groundwater table. Quantities larger than 0.5 cubic yards of concrete solids must either be managed with the rest of the site’s solid wastes or obtain an approval from the MPCA’s solid waste program for other beneficial use options. There are circumstances where concrete washout may be allowed onto a prepared compacted road bed. This allowance is intended for slip form paving type machines that cannot be readily moved off the paving area to a washout station. The area where wash water will flow onto must be compacted and will be paved over the next day. There must be a barrier of some type to keep the wash water on the compacted road bed until it dries. This allowance is not intended for truck washouts. A concrete washout sign must be installed at each temporary washout facility to inform the site personnel to use the designated facilities. The facility should be located close to the concrete pouring or mixing operation and be easily accessible by concrete mix trucks. It is also important to locate the facility so that spills or overflows will be directed away from storm drain inlets, curb and gutters, water conveyances or surface waters. The facility will need to be inspected regularly for leaks, damage, or potential overflow and receive regular maintenance. Washing of applicators and containers used for paint, concrete, or other materials The permittee must comply with the prohibition of discharges other than stormwater (Part V.C) that includes the washout and cleanout of stucco, paint, concrete, form release oils, curing compounds, and other construction materials. The permittee must provide effective containment for all liquid and solid wastes generated by washout operations and provide an effective means to eliminate the discharge of these wastes to the site or receiving waters. To comply, the permittee should evaluate and incorporate methods in the Stormwater Pollution Prevention Plan to prevent these discharges such as: 1. Direct all wash water into a leak-proof container or leak-proof pit. The container or pit must be designed so that no overflows can occur due to inadequate sizing or precipitation; 2. Handle washout or cleanout wastes as follows: • Do not dump liquid wastes in storm sewers • Dispose of liquid wastes properly • Remove and dispose of hardened concrete waste consistent with the handling of other construction wastes 3. Locate any washout or cleanout activities as far away as possible from surface waters and stormwater inlets or conveyances, and, to the extent practicable, designate areas to be used for these activities and conduct such activities only in these areas. Best management practices There are many BMP options for disposal of liquid and solid wastes from washout activities. Many ready mix trucks are now equipped with the ability to collect chute wash water and solids and return them to the concrete plant for recycling or re-use. Self-contained washout facility Page 3 of 4 December 2013 | wq-strm2-24 Concrete washout service Services are also available for hire that deliver a prefabricated washout container to collect concrete chute rinse water as well as wash water from tools and equipment generated on-site. Some services provide the containers alone without providing maintenance and disposal of materials, while other companies offer complete service that includes delivery of containers and regular pickups of solid and liquid waste materials. If these options are not available, the site owner and contractor can install a washout containment facility. A leak-proof container can be purchased or constructed onsite using an impermeable plastic or vinyl liner. The operators at the site will need to ensure no rips or tears develop in the liners or the liner will need to be replaced. Washout facilities should be designed to promote evaporation where feasible to harden the concrete or other washout wastes for disposal as a solid waste. Hardened concrete can also be crushed for reuse as a construction material. However, if stored liquids have not evaporated and the washout is nearing capacity, vacuum and dispose of the waste in an approved manner. The local municipal wastewater treatment plant may be contacted to determine if there are special disposal requirements for concrete or other washout waters at their facility. If the waste is stored onsite, remove the liquids or cover the washout facility before predicted rainstorms to prevent overflows. Companies that offer prefabricated and watertight washout containers generally offer a vacuum service to remove the liquid material. In case of a spill, immediately contain the spread of the spill, recover spilled materials, clean up the area and properly dispose of materials. Hardened concrete solids can be removed whole or broken up first depending on the type of equipment available on-site. In accordance with Minn. R. 7035.2860, subp. 4, item I; the hardened concrete can be used as a substitute for conventional aggregate. If the material is not utilized in accordance with the standing beneficial use determination referenced above, up to 0.5 cubic yards of concrete washout solids may be managed on-site. If concrete washout solids are buried on-site, they should be at least two feet below the surface and must not be buried in the groundwater table. Quantities larger than 0.5 cubic yards of concrete washout solids must either be managed with the rest of the sites solid wastes or obtain an approval from the MPCA’s Solid Waste program for other beneficial use options. Road construction concrete cutting or grinding slurry Other operations on-site such as saw cutting, coring, grinding and grooving or construction of exposed- aggregate concrete surfaces may generate a similar liquid wastewater. Process wastewater generated by these operations cannot be discharged into any of the nation’s waterways. The MPCA recommends that liquid and solid wastes generated by these operations be handled in accordance with the fact sheet Road Construction Concrete Slurry Guidance found at http://www.pca.state.mn.us/index.php/water/water-types-and-programs/stormwater/construction- stormwater/road-construction-concrete-slurry-guidance.html. Local requirements In addition to state requirements, please note that there may be city, county or watershed management organization requirements that may be more stringent than those found in the NPDES/SDS Construction Stormwater Permit. Definitions Concrete-chute rinse-off water: Liquid wastes generated when a ready mix truck operator washes non- structural concrete materials off the chutes used to deliver concrete to a project. Page 4 of 4 December 2013 | wq-strm2-24 Concrete equipment and tools rinse-off water: Liquid wastes generated when a concrete contractor or finisher washes non-structural concrete materials off tools or equipment used to place or finish concrete. Plastic concrete is that freshly mixed structural concrete which is pliable and capable of being molded or shaped like a lump of modeling clay. Hardened structural concrete is a strong, non-combustible, durable, abrasion-resistant and practically impermeable material. Additional information United States Environmental Protection Agency Concrete Washout Guidelines: http://www.epa.gov/npdes/pubs/concretewashout.pdf. Minnesota Department of Transportation Concrete Guidance (except for reference to ground contact with low infiltration soils) http://www.dot.state.mn.us/environment/erosion/construction.html. For more information, call the MPCA Stormwater Hotline at 651-757-2119 or 800-657-3804. 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SaintMarks Cem Moravian Cem ChanhassenPioneer Cem MountPleasantCem GuardianAngel Cem SaintHubertCatholic Cem ShakopeeCatholic Cem SaintJohn's Cem Hazeltine Carver VICTORIA EDEN PRAIRIE Carver SHAKOPEE CHASKA CHANHASSEN 57 58 59 60 61 62 63 64 65 66 67 68 56 4969 000mN 57 58 59 60 61 62 63 64 65 66 67 68 4956000mN 69 52 53 54 55 56 57 58 5951 460 000mE 52 53 54 55 56 57 58 59451000mE 60 44.7500° 44.8750° -93.6250°-93.5000°44.8750° 44.7500°-93.5000°-93.6250° 31 18 7 19 30 18 109 23 20 16 12 14 11 17 13 2221 8 15 8 7 24 19 18 19 6 7 27 13 36 9 14 30 23 11 24 8 31 21 3 15 33 2 7 34 4 22 32 6 10 29 20 18 17 35 12 28 25 5 1 19 16 26 T115N R23W T115N R23W T115N R22W T116N R23W T116N R22W T116N R22W QUADRANGLE LOCATION SHAKOPEE QUADRANGLEMINNESOTA7.5-MINUTE SERIES SHAKOPEE, MN 2019 Expressway Local Connector ROAD CLASSIFICATION Ramp 4WD Secondary Hwy Local Road Interstate Route State RouteUS RouteWX./H U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY This map was produced to conform with the National Geospatial Program US Topo Product Standard, 2011.A metadata file associated with this product is draft version 0.6.18 CONTOUR INTERVAL 10 FEETNORTH AMERICAN VERTICAL DATUM OF 1988 SCALE 1:24 000 1000 500 0 METERS 1000 2000 21KILOMETERS00.51 1 0.5 0 MILES 1 1000 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 FEET × Ù GN MN 0°24´ 7 MILS 0°22´ 7 MILS UTM GRID AND 2019 MAGNETIC NORTH DECLINATION AT CENTER OF SHEET VK Grid Zone Designation 15T U.S. National Grid100,000 - m Square ID MINNESOTA 1 Mound 8 Prior Lake 2 Excelsior3 Hopkins4 Victoria5 Eden Prairie6 Jordan West7 Jordan East ADJOINING QUADRANGLES 76 4 8 2 3 5 1 Imagery.....................................................NAIP, August 2017 - November 2017Roads......................................... U.S. Census Bureau, 2016Names............................................................................GNIS, 1980 - 2018Hydrography...............................National Hydrography Dataset, 1899 - 2018Contours............................................National Elevation Dataset, 2016Boundaries..............Multiple sources; see metadata file 2017 - 2018Public Land Survey System................................................BLM, 2017Wetlands.................FWS National Wetlands Inventory 2010 North American Datum of 1983 (NAD83)World Geodetic System of 1984 (WGS84). Projection and1 000-meter grid:Universal Transverse Mercator, Zone 15T Produced by the United States Geological Survey This map is not a legal document. Boundaries may begeneralized for this map scale. Private lands within governmentreservations may not be shown. Obtain permission beforeentering private lands.*7643016373275*NSN.7643016373275NGA REF NO.USGSX24K40744