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STORM WATER POLLUTION PREVENTION PLAN NARRATIVE - PAGE 2 OR 2
<br />STABILIZATION TIME FRAMES
<br />ALL AREAS DISTURBED BY CONSTRUCTION WILL RECEIVE SEED OR SOD ACCORDING TO THE PLANS AND
<br />SPECIFICATIONS AND WITHIN THE SPECIFIED VEGETATIVE TIME SCHEDULE. FINAL STABILIZATION WILL
<br />OCCUR WHEN THE SITE HAS A UNIFORM VEGETATIVE COVER WITH A DENSITY OF 70% OVER THE ENTIRE
<br />DISTURBED AREA COMPARED TO EXISTING CONDITIONS. ALL TEMPORARY SYNTHETIC EROSION
<br />PREVENTION AND SEDIMENT CONTROL BMPS MUST BE REMOVED AS PART OF THE SITE FINAL
<br />STABILIZATION. ALL SEDIMENT MUST BE CLEANED OUT OF CONVEYANCES AND TEMPORARY
<br />SEDIMENTATION BASINS IF APPLICABLE.
<br />1.INITIATE INLET STABILIZATION IMMEDIATELY WHEN CONSTRUCTION HAS TEMPORARILY OR
<br />PERMANENTLY CEASED ON ANY PORTION OF THE SITE. COMPLETE STABILIZATION WITHIN THE TIME
<br />FRAME LISTED. IN MANY INSTANCES THIS WILL REQUIRE STABILIZATION TO OCCUR MORE THAN ONCE
<br />DURING THE COURSE OF THE PROJECT. TEMPORARY SOIL STOCKPILES WITHOUT SIGNIFICANT CLAY
<br />OR SILT AND STOCKPILED AND CONSTRUCTED ROAD BASE ARE NOT APPROPRIATE AND THEREFORE
<br />EXEMPT FROM THE STABILIZATION REQUIREMENT.
<br />2.APPLICATION OF MULCH, HYDROMULCH, TACKIFIER AND POLYACRYLAMIDE ARE NOT ACCEPTABLE
<br />STABILIZATION METHODS IN THESE AREAS.
<br />3.STABILIZE ALL AREAS OF THE SITE PRIOR TO THE ONSET OF WINTER, ANY WORK STILL BEING
<br />PERFORMED WILL BE SNOW MULCHED, SEEDED, AND BLANKETED WITHIN THE TIME FRAMES IN THE
<br />NPDES PERMIT.
<br />4.TOPSOIL BERMS MUST BE STABILIZED IN ORDER TO BE CONSIDERED PERIMETER CONTROL BMPS.
<br />USE RAPID STABILIZATION METHOD 2, 3, OR 4 AS DIRECTED BY THE ENGINEER. THE SEED MIX USED IN
<br />THE RAPID STABILIZATION MAY BE SUBSTITUTED AS FOLLOWS:
<br />A.SINGLE YEAR CONSTRUCTION BETWEEN MAY 1 - AUGUST 1, SEED WITH SEED MIXTURE 21.111
<br />B.SINGLE YEAR CONSTRUCTION BETWEEN AUGUST 1 AND OCTOBER 31, SEED WITH SEED
<br />MIXTURE 21-112
<br />C.MULTI YEAR CONSTRUCTION 22-111
<br />5.KEEP DITCHES AND EXPOSED SOILS IN AN EVEN ROUGH GRADED CONDITION IN ORDER TO BE ABLE
<br />TO APPLY EROSION CONTROL MULCHES, HYDROMULCHES AND BLANKETS.
<br />GENERAL SWPPP NOTES FOR CONSTRUCTION ACTIVITY
<br />1.CONTRACTOR SHALL AMEND THE SWPPP AND DOCUMENT ANY AND ALL CHANGES TO THE SWPPP
<br />AND ASSOCIATED PLAN SHEETS WITHIN 7 DAYS UPON IMPLEMENTATION. STORE THE SWPPP AND ALL
<br />AMENDMENTS ON SITE AT ALL TIMES.
<br />2.PREPARE AND SUBMIT A SITE MANAGEMENT PLAN FOR THE ENGINEER'S ACCEPTANCE FOR
<br />CONCRETE MANAGEMENT, CONCRETE SLURRY APPLICATION AREAS, WORK IN AND NEAR AREAS OF
<br />ENVIRONMENTAL SENSITIVITY, AREAS IDENTIFIED IN THE PLANS AS "SITE MANAGEMENT PLAN AREA",
<br />ANY WORK THAT WILL REQUIRE DEWATERING, AND AS REQUESTED BY THE ENGINEER. SUBMIT ALL
<br />SITE MANAGEMENT PLANS TO THE ENGINEER IN WRITING. ALLOW ALL MINIMUM OF 7 DAYS FOR THE
<br />ENGINEER TO REVIEW AND ACCEPT SITE MANAGEMENT PLAN SUBMITTALS. WORK WILL NOT BE
<br />ALLOWED TO COMMENCE IF A SITE MANAGEMENT PLAN IS REQUIRED UNTIL ACCEPTANCE HAS BEEN
<br />GRANTED BY THE ENGINEER. THERE WILL BE NO EXTRA TIME ADDED TO THE CONTRACT DUE TO THE
<br />UNTIMELY SUBMITTAL.
<br />3.IT IS THE DESIGNER'S INTENT THAT THE CONTRACTOR BUILD PONDS AND INSTALL EROSION
<br />CONTROL BMPS BEFORE PUTTING THEM INTO ACTIVE SERVICE TO THE MAXIMUM EXTENT
<br />PRACTICABLE.
<br />4.BURNING OF ANY MATERIAL IS NOT ALLOWED WITHIN PROJECT BOUNDARY.
<br />5.DO NOT DISTURB AREAS OUTSIDE OF THE CONSTRUCTION LIMITS. DELINEATE AREAS NOT TO BE
<br />DISTURBED PRIOR TO STARTING GROUND DISTURBING ACTIVITIES. IF IT BECOMES NECESSARY TO
<br />DISTURBED AREAS OUTSIDE OF THE CONSTRUCTION LIMITS OBTAIN WRITTEN PERMISSION FROM THE
<br />PROJECT ENGINEER PRIOR TO PROCEEDING. PRESERVE ALL NATURAL BUFFERS SHOWN ON THE
<br />PLANS.
<br />6.ROUTE STORMWATER AROUND UNSTABILIZED AREAS OF THE SITE WHENEVER FEASIBLE. PROVIDE
<br />EROSION CONTROL AND VELOCITY DISSIPATION DEVICES AS NEEDED TO KEEP CHANNELS FROM
<br />ERODING AND TO PREVENT NUISANCE CONDITIONS AT THE OUTLET.
<br />7.DIRECT DISCHARGES FROM BMPS TO VEGETATED AREA WHENEVER FEASIBLE. PROVIDE VELOCITY
<br />DISSIPATION DEVICES AS NEEDED TO PREVENT EROSION.
<br />8.THE EROSION PREVENTION AND SEDIMENT CONTROL BMPS SHALL BE PLACED AS NECESSARY TO
<br />MINIMIZE EROSION FROM DISTURBED SURFACES AND TO CAPTURE SEDIMENT ON SITE. ALL EROSION
<br />CONTROL MEASURES SHALL BE IN PLACE PRIOR TO COMMENCEMENT OF ANY REMOVAL WORK
<br />AND/OR GROUND DISTURBING ACTIVITIES COMMENCE.
<br />9.ESTABLISH SEDIMENT CONTROL DEVICES ON ALL DOWN GRADIENT PERIMETERS AND UP GRADIENT
<br />OF ANY BUFFER ZONES BEFORE AND UP GRADIENT LAND DISTURBING ACTIVITIES BEGIN. MAINTAIN
<br />SEDIMENT CONTROL DEVICES UNTIL CONSTRUCTION IS COMPLETE AND THE SITE IS STABILIZED.
<br />10.LOCATE PERIMETER CONTROL ON THE CONTOUR TO CAPTURE OVERLAND, LOW-VELOCITY SHEET
<br />FLOWS DOWN GRADIENT OF ALL EXPOSED SOILS AND PRIOR TO DISCHARGING TO SURFACE WATERS.
<br />PLACE J-HOOKS AT A MAXIMUM OF 100 FOOT INTERVALS.
<br />11.PROVIDE PERIMETER CONTROL AROUND ALL STOCKPILES. PLACE BMP A MINIMUM 5 FEET FROM THE
<br />TOE OF SLOPE WHERE FEASIBLE. DO NOT PLACE STOCKPILES IN NATURAL BUFFER AREAS, SURFACE
<br />WATERS OR STORMWATER CONVEYANCES.
<br />12.DISCHARGE TURBID OR SEDIMENT LADEN WATER TO TEMPORARY SEDIMENT BASINS WHENEVER
<br />FEASIBLE. IN THE EVENT THAT IT IS NOT FEASIBLE TO DISCHARGE THE SEDIMENT LADEN WATER TO A
<br />TEMPORARY SEDIMENT BASIN, THE WATER MUST BE TREATED SO THAT IT DOES NOT CAUSE A
<br />NUISANCE CONDITION IN THE RECEIVING WATERS OR TO DOWNSTREAM LANDOWNERS. CLEAN OUT
<br />ALL PERMANENT STORMWATER BASINS REGARDLESS OF WHETHER USED AS TEMPORARY SEDIMENT
<br />BASINS OR TEMPORARY SEDIMENT TRAPS TO THE DESIGN CAPACITY AFTER ALL UP GRADIENT LAND
<br />DISTURBING ACTIVITY IS COMPLETED.
<br />13.PROVIDE SCOUR PROTECTION AT ANY OUTFALL OF DEWATERING ACTIVITIES.
<br />14.PROVIDE STABILIZATION IN ANY TRENCHES CUT FOR DEWATERING OR SITE DRAINING PURPOSES.
<br />POLLUTION PREVENTION
<br />1.PROVIDE A SPILL KIT AT EACH WORK LOCATION ON THE SITE.
<br />2.STORE ALL BUILDING MATERIALS THAT HAVE THE POTENTIAL TO LEACH POLLUTANTS, PESTICIDES,
<br />HERBICIDES, INSECTICIDES. FERTILIZERS, TREATMENT CHEMICALS, AND LANDSCAPE MATERIALS
<br />UNDER COVER WITH SECONDARY CONTAINMENT.
<br />3.PROVIDE A SECURE STORAGE AREA WITH RESTRICTED ACCESS FOR ALL HAZARDOUS MATERIALS
<br />AND TOXIC WASTE. RETURN ALL HAZARDOUS MATERIALS AND TOXIC WASTE TO THE DESIGNATED
<br />STORAGE AREA AT THE END OF THE BUSINESS DAY UNLESS INFEASIBLE. STORE ALL HAZARDOUS
<br />MATERIALS AND TOXIC WASTE (INCLUDING BUT NOT LIMITED TO OIL, DIESEL FUEL, GASOLINE,
<br />HYDRAULIC FLUIDS, PAINT, PETROLEUM BASED PRODUCTS, WOOD PRESERVATIVES, ADDITIVES,
<br />CURING COMPOUNDS, AND ACIDS) IN SEALED CONTAINERS WITH SECONDARY CONTAINMENT. CLEAN
<br />UP SPILLS IMMEDIATELY.
<br />4.STORE, COLLECT AND DISPOSE OF ALL SOLID WASTE.
<br />5.POSITION ALL PORTABLE TOILETS SO THAT THEY ARE SECURE AND CANNOT BE TIPPED OR KNOCKED
<br />OVER. PROPERLY DISPOSE OF ALL SANITARY WASTE.
<br />6.FUEL AND MAINTAIN VEHICLES IN A DESIGNATED CONTAINED AREA WHENEVER FEASIBLE. USE DRIP
<br />PANS OR ABSORBENT MATERIALS TO PREVENT SPILLS OR LEAKED CHEMICALS FORM DISCHARGING
<br />TO SURFACE WATER OR STORMWATER CONVEYANCES. PROVIDE A SPILL KIT AT EACH LOCATION
<br />THAT VEHICLES AND EQUIPMENT ARE FUELED OR MAINTAINED AT.
<br />7.LIMIT VEHICLE AND EQUIPMENT WASHING TO A DEFINED AREA OF THE SITE. CONTAIN RUNOFF FROM
<br />THE WASHING AREA TO A TEMPORARY SEDIMENT BASIN OR OTHER EFFECTIVE CONTROL. PROPERLY
<br />DISPOSE OF ALL WASTE GENERATED BY VEHICLE AND EQUIPMENT WASHING. ENGINE DEGREASING IS
<br />NOT ALLOWED ON THE SITE.
<br />8.PROVIDE EFFECTIVE CONTAINMENT FOR ALL LIQUID AND SOLID WASTES GENERATED BY WASHOUT
<br />OF CONCRETE, STUCCO, PAINT, FORM RELEASE OILS, CURING COMPOUNDS AND OTHER
<br />CONSTRUCTION MATERIALS. LIQUID AND SOLID WASHOUT WASTES MUST NOT CONTACT THE
<br />GROUND. DESIGN THE CONTAINMENT SO THAT IT DOES NOT RESULT IN RUNOFF FROM THE WASHOUT
<br />OPERATIONS OR CONTAINMENT AREA.
<br />9.CREATE AND FOLLOW A WRITTEN DISPOSAL PLAN FOR ALL WASTE MATERIALS. INCLUDE IN THE PLAN
<br />HOW THE MATERIAL WILL BE DISPOSED OF AND THE LOCATION OF THE DISPOSAL SITE. SUBMIT PLAN
<br />TO THE ENGINEER.
<br />10.USE METHODS AND OPERATIONAL PROCEDURES THAT PREVENT CONCRETE DUST, PARTICLES,
<br />CONCRETE WASH OUT, AND OTHER CONCRETE WASTES FROM LEAVING SITE, DEPOSITING IN
<br />EXISTING OR FUTURE VEGETATED AREAS, AND FROM ENTERING STORMWATER CONVEYANCE
<br />SYSTEMS, INCLUDING INLETS, DITCHES AND CURB FLOW LINES. USE METHODS AND OPERATIONAL
<br />PROCEDURES THAT PREVENT SAW CUT SLURRY AND PLANING WASTE FROM LEAVING SITE AND
<br />FROM ENTERING STORMWATER CONVEYANCE SYSTEMS INCLUDING DITCHES AND CULVERTS.
<br />RECORD RETENTION
<br />THE SWPPP, ALL CHANGES TO IT AND INSPECTION AND MAINTENANCE RECORDS MUST BE KEPT ON-SITE
<br />DURING CONSTRUCTION. THE OWNER MUST RETAIN A COPY OF THE SWPPP ALONG WITH THE FOLLOWING
<br />RECORDS FOR THREE (3) YEARS AFTER SUBMITTAL OF THE NOTICE OF TERMINATION (NOT).
<br />1.ANY OTHER PERMITS REQUIRED FOR THE PROJECT.
<br />2.RECORDS OF ALL INSPECTION AND MAINTENANCE CONDUCTED DURING CONSTRUCTION
<br />3.ALL PERMANENT OPERATIONS AND MAINTENANCE AGREEMENT THAT HAVE BEEN IMPLEMENTED
<br />INCLUDING ALL RIGHT OF WAY, CONTRACTS, COVENANTS AND OTHER BINDING REQUIREMENTS
<br />REGARDING PERPETUAL MAINTENANCE; AND
<br />4.ALL REQUIRED CALCULATIONS FOR DESIGN OF THE TEMPORARY AND PERMANENT STORMWATER
<br />MANAGEMENT SYSTEMS.
<br />SWPPP SCHEDULE OF INSTALLATION & MAINTENANCE
<br />DESCRIPTION OF PERMANENT STORMWATER TREATMENT SYSTEMS
<br />STORMWATER IS TREATED BY FOUR STORMWATER PONDS THROUGHOUT THE SITE. SEE STORMWATER
<br />MANAGEMENT PLAN REPORT.
<br />CALCULATIONS FOR TEMPORARY & PERMANENT STORMWATER TREATMENT SYSTEMS
<br />SEE STORMWATER MANAGEMENT PLAN REPORT.
<br />ESTIMATED BMPS QUANTITIES
<br />STORM WATER POLLUTION PREVENTION PLAN NARRATIVE - PAGE 2 OR 2
<br />AREA TIME FRAME NOTES
<br />LAST 200 LINEAL FEET OF DRAINAGE
<br />DITCH OR SWALE
<br />WITHIN 24 HOURS OF CONNECTION TO
<br />SURFACE WATER OR PROPERTY EDGE 1, 2, 3
<br />REMAINING PORTIONS OF DRAINAGE
<br />DITCH OR SWALE 7 DAYS 1, 3
<br />PIPE AND CULVERT OUTLETS 24 HOURS
<br />STOCKPILES 7 DAYS 1
<br />ITEM INSTALLATION INSPECTION &
<br />MAINTENANCE REMOVAL
<br />SILT FENCE PRIOR TO COMMENCEMENT OF
<br />EARTHWORK OPERATIONS.
<br />INSPECT & MAINT. AFTER EACH
<br />RUN-OFF EVENT. REMOVE
<br />SEDIMENTS AS REQUIRED.
<br />AFTER TRIBUTARY DRAINAGE
<br />AREA IS RESTORED.
<br />ROCK CONST.
<br />ENTRANCE
<br />PRIOR TO COMMENCEMENT OF
<br />EARTHWORK OPERATIONS.
<br />INSPECT REGULARLY. MAINTAIN
<br />AS NEEDED.PRIOR TO PAVING.
<br />OUTLET SKIMMER
<br />STRUCTURE AFTER POND GRADING IS
<br />COMPLETED.
<br />INSPECT REGULARLY. MAINTAIN
<br />AS NEEDED.PERMANENT.
<br />RIP-RAP &
<br />FILTER
<br />UPON COMPLETION OF POND
<br />GRADING, CONC. SWALE CONST.
<br />AND OUTLET INSTALLATION.
<br />INSPECT & MAINTAIN AT LEAST
<br />ANNUALLY AND AFTER HEAVY
<br />RAINFALL EVENT.
<br />PERMANENT.
<br />DETENTION POND DURING EARTHWORK
<br />OPERATIONS.
<br />AFTER HEAVY RAINFALL EVENTS.
<br />REMOVE SEDIMENTS AS NEEDED.PERMANENT.
<br />SEED & MULCH AFTER POND GRADING IS
<br />COMPLETED.
<br />INSPECT & MAINTAIN AFTER HEAVY
<br />RAINS. REPLACE WASH-OUT
<br />AREAS IMMEDIATELY
<br />NO REMOVAL NECESSARY.
<br />INLET PROTECTION UPON INLET CONSTRUCTING WHEN 1/3 CAPACITY OF BMP IS
<br />REACHED
<br />AFTER TRIBUTARY AREAS
<br />ARE FULLY RESTORED
<br />BMP ORIGINAL ESTIMATE MODIFICATION DATE
<br />ENERGY DISSIPATER
<br />TEMP. DIVERSION DIKES
<br />CHECK DAMS
<br />TEMP SEEDING
<br />PERMANENT SEEDING
<br />PERMANENT SODDING
<br />MULCHES (SPECIFY TYPES)
<br />CAT 3 EROSION CONTROL BLANKET
<br />SOIL TACKIFIERS
<br />SILT FENCING
<br />EROSION CONTROL MATS
<br />STORM DRAIN INLET PROTECTION
<br />TEMPORARY OR PERMANENT
<br />SEDIMENTATION BASINS
<br />CONSTRUCTION ENTRANCE
<br />DEWATERING (TREATMENT LOCATION,
<br />SCHEMATIC, & SAMPLING PLAN REQUIRED
<br />CONCRETE TRUCK WASHOUT
<br />SWPPP - PG 2
<br />C10
<br />PLOTTED:COMM. NO.
<br />DRAWING NO.
<br />----17004
<br />ONEKA PRAIRIE
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<br />P l y m o u t h , M N 5 5 4 4 1 | a e -m n .c o m
<br />P 7 6 3 .4 1 2 .4 0 0 0 | F 7 6 3 .4 1 2 .4 0 9 0
<br />A n d e r s o n E n g i n e e r i n g o f M i n n e s o t a , L L C
<br />DRAWING TITLE
<br />CHECKED BY:DRAWN:DESIGNED:
<br />ATJRAT
<br />08/09/2022
<br />REVISION LOG
<br />DESCRIPTION OF REVISIONSNO.DATE
<br />SOUTHWIND HOLDINGS, LLC
<br />PRELIMINARY PLAT
<br />51317
<br />ADAM THIELE, PEPRINT NAME:
<br />SIGNATURE:
<br />I HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR
<br />REPORT WAS PREPARED BY ME OR UNDER MY DIRECT
<br />SUPERVISION AND THAT I AM A DULY LICENSED
<br />PROFESSIONAL ENGINEER UNDER THE LAWS OF THE STATE
<br />OF MINNESOTA.
<br />DATE:LICENSE NO.08/09/2022
<br />1 8/19/22 REVISED PER CITY COMMENTS
<br />2 10/31/22 REVISED PER UPDATED DELINEATION
<br />3 11/18/22 REVISED PER CITY COMMENTS
<br />4 11/21/22 STORM SEWER REVISIONS
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