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DateRED FOX BUSINESS CENTER RED FOX ROAD ARDEN HILLS, MN 55112 1 12.12.14 CITY COMMENTS Sheet:Sheet Title:Project #:Drawn By:Checked By:Issue Date:12146174.000 CBS PSM 12.01.143524 Labore Road White Bear Lake, MN 55110 651.481.9120 (f) 651.481.9201 www.larsonengr.com C 2014 Larson Engineering, Inc. All rights reserved. <br />P: <br />\ <br />P <br />r <br />o <br />j <br />e <br />c <br />t <br />s <br />\ <br />P <br />r <br />o <br />j <br />e <br />c <br />t <br />s <br /> <br />- <br /> <br />2 <br />0 <br />1 <br />4 <br />\ <br />1 <br />2 <br />1 <br />4 <br />6 <br />1 <br />7 <br />4 <br />- <br /> <br />R <br />o <br />b <br />e <br />r <br />t <br />s <br /> <br />M <br />a <br />n <br />a <br />g <br />e <br />m <br />e <br />n <br />t <br /> <br />G <br />r <br />o <br />u <br />p <br /> <br />- <br /> <br />A <br />H <br /> <br />D <br />e <br />v <br />e <br />l <br />o <br />p <br />m <br />e <br />n <br />t <br />\ <br />C <br />. <br /> <br />D <br />e <br />s <br />i <br />g <br />n <br />\ <br />D <br />r <br />a <br />w <br />i <br />n <br />g <br /> <br />F <br />i <br />l <br />e <br />s <br />\ <br />1 <br />2 <br />1 <br />4 <br />6 <br />1 <br />7 <br />4 <br /> <br />C <br />4 <br /> <br />E <br />R <br />O <br />S <br />I <br />O <br />N <br /> <br />C <br />O <br />N <br />T <br />R <br />O <br />L <br />. <br />d <br />w <br />g <br />3524 Labore Road White Bear Lake, MN 55110 651.481.9120 (f) 651.481.9201 www.larsonengr.com Project Title:Roberts Management Group 1851 Buerkle Road White Bear Lake, MN 55110 Client:Date: Reg. No.:I hereby certify that this plan,specifications 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.of 70NORTH25 50 100PRELIMINARY NOT FOR CONSTRUCTION Matt Woodruff, P.E.2 01.26.15 CITY COMMENTS EROSION CONTROL PLAN C4 41. Owner and Contractor shall obtain MPCA-NPDES permit. Contractor shall be responsible for all fees pertaining to this permit. The SWPPP shall be kept onsite at all times.2. Install temporary erosion control measures (inlet protection, silt fence, and rock construction entrances) prior to beginning any excavation or demolition work at the site.3. Erosion control measures shown on the erosion control plan are the absolute minimum. The contractor shall install temporary earth dikes, sediment traps or basins, additional siltation fencing, and/or disk the soil parallel to the contours as deemed necessary to further control erosion. All changes shall be recorded in the SWPPP.4. All construction site entrances shall be surfaced with crushed rock across the entire width of the entrance and from the entrance to a point 50' into the construction zone.5.7KHWRHRIWKHVLOWIHQFHVKDOOEHWUHQFKHGLQDPLQLPXPRI´7KHWUHQFKEDFNILOOVKDOOEH compacted with a vibratory plate compactor.6. All grading operations shall be conducted in a manner to minimize the potential for site erosion.Sediment control practices must be established on all down gradient perimeters before any up gradient land disturbing activities begin.7. All exposed soil areas must be stabilized as soon as possible to limit soil erosion but in no case later than 14 days after the construction activity in that portion of the site has temporarily or permanently ceased. Temporary stockpiles without significant silt, clay or organic components (e.g., clean aggregate stockpiles, demolition concrete stockpiles, sand stockpiles) and the constructed base components of roads, parking lots and similar surfaces are exempt from this requirement.8. The normal wetted perimeter of any temporary or permanent drainage ditch or swale that drains water from any portion of the construction site, or diverts water around the site, must be stabilized within 200 lineal feet from the property edge, or from the point of discharge into any surface water. Stabilization of the last 200 lineal feet must be completed within 24 hours after connecting to a surface water. Stabilization of the remaining portions of any temporary or permanent ditches or swales must be complete within 14 days after connecting to a surface water and construction in that portion of the ditch has temporarily or permanently ceased.9. Pipe outlets must be provided with energy dissipation within 24 hours of connection to surface water.10. All riprap shall be installed with a filter material or soil separation fabric and comply with the Minnesota Department of Transportation Standard Specifications.11. All storm sewers discharging into wetlands or water bodies shall outlet at or below the normal water level of the respective wetland or water body at an elevation where the downstream slope is 1 percent or flatter. The normal water level shall be the invert elevation of the outlet of the wetland or water body.12. All storm sewer catch basins not needed for site drainage during construction shall be covered to prevent runoff from entering the storm sewer system. Catch basins necessary for site drainage during construction shall be provided with inlet protection.13. In areas where concentrated flows occur (such as swales and areas in front of storm catch basins and intakes) the erosion control facilities shall be backed by stabilization structure to protect those facilities from the concentrated flows.14. Inspect the construction site once every seven days during active construction and within 24 hours after a rainfall event greater than 0.5 inches in 24 hours. All inspections shall be recorded in the SWPPP.15. All BMPs must be repaired, replaced, or supplemented when they become nonfunctional or the sediment reaches 1/3 of the height of the BMP. These repairs must be made within 24 hours of discovery, or as soon as field conditions allow access. All repairs shall be recorded in the SWPPP.16. If sediment escapes the construction site, off-site accumulations of sediment must be removed in a manner and at a frequency sufficient to minimize off-site impacts.17. All soils tracked onto pavement shall be removed daily.18. All infiltration areas must be inspected to ensure that no sediment from ongoing construction activity is reaching the infiltration area and these areas are protected from compaction due to construction equipment driving across the infiltration area.19. Temporary soil stockpiles must have silt fence or other effective sediment controls, and cannot be placed in surface waters, including stormwater conveyances such as curb and gutter systems, or conduits and ditches unless there is a bypass in place for the stormwater.20. Collected sediment, asphalt and concrete millings, floating debris, paper, plastic, fabric,construction and demolition debris and other wastes must be disposed of properly and must comply with MPCA disposal requirements.21. Oil, gasoline, paint and any hazardous substances must be properly stored, including secondary containment, to prevent spills, leaks or other discharge. Restricted access to storage areas must be provided to prevent vandalism. Storage and disposal of hazardous waste must be in compliance with MPCA regulations.22. External washing of trucks and other construction vehicles must be limited to a defined area of the site. Runoff must be contained and waste properly disposed of. No engine degreasing is allowed onsite.23. All liquid and solid wastes generated by concrete washout operations must be contained in a leak-proof containment facility or impermeable liner. A compacted clay liner that does not allow washout liquids to enter ground water is considered an impermeable liner. The liquid and solid wastes must not contact the ground, and there must not be runoff from the concrete washout operations or areas. Liquid and solid wastes must be disposed of properly and in compliance with MPCA regulations. A sign must be installed adjacent to each washout facility to inform concrete equipment operators to utilize the proper facilities.24. Upon completion of the project and stabilization of all graded areas, all temporary erosion control facilities (silt fences, hay bales, etc.) shall be removed from the site.25. All permanent sedimentation basins must be restored to their design condition immediately following stabilization of the site.26. Contractor shall submit Notice of Termination for MPCA-NPDES permit within 30 days after Final Stabilization.EROSION CONTROL NOTES SILT FENCE RIP-RAP / ROCK CONST. ENTRANCE INLET PROTECTION CONCRETE WASHOUT STATIONLEGEND