HomeMy WebLinkAbout2011 Stormwater Pollution Prevention Plan33
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STORMWATER POLLUTION PREVENTION PLAN
WILLIAIVI BOWMAN
IN THE NW 1/4 OF SW 1/4 OF SEC. 3-117-23
� HENNEPIN COUNTY, MINNESOTA
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PROPOSED GARAGE FLOOR = 953.0
PROPOSED BASEMENT FLOOR = 953.0
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City of Orono
Planning & Zoning Plan
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EROSION AND SEDIMENT CONTROL
GENERAL NO I Eb:
1. PRIOR TO ANY CONSTRUCTION OR DEMOLITION, SILT FENCE AND FILTERS MUST BE INSTALLED.
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2. ALL EROSION CONTROL INSTALLATIONS SHALL REMAIN IN PLACE AND BE MAINTAINED IN GOOD
CONDITION BY THE CONTRACTOR UNTIL THE SITE HAS BEEN RE -VEGETATED. CONTRACTOR MAY
REMOVE NECESSARY SILT FENCING/FILTERS TO CONSTRUCT ROADWAYS, WHILE MAINTAINING
ADEQUATE EROSION CONTROL IN ADJACENT AREA.
3. THE CONTRACTOR SHALL SCHEDULE SITE GRADING, UTILITY INSTALLATION AND PAVEMENT
CONSTRUCTION SO THAT THE GENERAL SITE CAN BE MULCHED AND RE -SEEDED SOON AFTER
DISTURBANCE. AREAS THAT WILL NOT BE SUBJECT TO CONSTRUCTION TRAFFIC SHALL BE SEEDED
(MnDOT MIX 190 @ 100#/AC AND MULCHED OR SODDED WITHIN SEVEN DAYS OF BEING DISTURBED.
4. CONTRACTOR SHALL INSTALL EROSION CONTROL DEVICES AS INDICATED ON THIS EROSION
CONTROL PLAN AND ANY ADDITIONAL REQUIRED, BASED ON MEANS, METHODS AND
SEQUENCES OF CONSTRUCTION,
5. BEST MANAGEMENT PRACTICES (BMP'S) REFER TO EROSION AND SEDIMENT CONTROL
PRACTICES DEFINED IN THE MPCA PROTECTING WATER QUALITY IN URBAN AREAS AND THE
MINNESOTA CONSTRUCTION SITE EROSION AND SEDIMENT CONTROL PLANNING HANDBOOK.
6. ALL BMP'S SELECTED SHALL BE APPROPRIATE FOR THE TIME OF YEAR, SITE CONDITIONS,
AND ESTIMATED DURATION OF USE.
7. ALL SEPTIC AREAS ARE TO BE FENCED OFF FOR PROTECTION. PROTECTION TO EXTEND A
MINIMUM OF 20' OUTSIDE OF SEPTIC AREAS.
8. INSTALL PERIMETER CONTROL DEVICES AROUND ANY DIRT STOCKPILE AREAS.
9. THE CONTRACTOR MUST SCHEDULE HIS OPERATIONS TO MINIMIZE THE AMOUNT OF DISTURBED
AREA AT ANY GIVEN TIME. THE CONTRACTOR MUST LIMIT THEIR ACTIVITIES TO THE GRADING
LIMITS SHOWN.
10. EROSION CONTROL BLANKETS MUST BE INSTALLED BETWEEN THE NWL AND HWL OF ANY
PROPOSED POND AFTER FINAL GRADING.
11. WHEREVER POSSIBLE, PRESERVE THE EXISTING TREES, GRASS AND OTHER VEGETATIVE
COVER TO HELP FILTER RUNOFF.
12. ALL TREES NOT LISTED FOR REMOVAL SHALL BE PROTECTED. DO NOT OPERATE EQUIPMENT
WHITHIN THE DRIPLINE, ROOT ZONES OR WITHIN THE TREE PROTECTION FENCE AREA.
13. SILT FENCE IS REQUIRED AT DOWN GRADIENT PERIMETER OF DISTURBED AREAS AND
STOCKPILES. PROTECT WETLANDS, WATERCOURSES AND ADJACENT PROPERTIES FROM
SEDIMENTATION AND STORMWATER RUNOFF.
14. THE BMP'S SHOWN ON THE PLANS ARE THE MINIMUM REQUIREMENTS FOR THE ANTICIPATED
SITE CONDITIONS. AS CONSTRUCTION PROGRESSES AND UNEXPECTED OR SEASONAL
CONDITIONS, DICTATE, THE PERMITEE/CONTRACTOR SHALL ANTICIPATE THAT MORE BMP'S
WILL BE NECESSARY TO ENSURE EROSION AND SEDIMENT CONTROL ON THE SITE. DURING
THE COURSE OF CONSTRUCTION, IT IS THE RESPONSIBILITY OF THE PERMITEE/CONTRACTOR
TO ADDRESS ANY NEW CONDITIONS THAT MAY BE CREATED BY CONSTRUCTION ACTIVITIES
AND/OR CLIMATIC EVENTS.
15. PROVIDE ADDITIONAL BMP'S OVER AND ABOVE THE MINIMUM REQUIREMENTS SHOWN ON
THE PLANS, AS MAY BE NEEDED TO PROVIDE EFFECTIVE PROTECTION OF WATER AND
SOIL RESOURCES.
16. OPERATE TRACK EQUIPMENT (DOZER) UP AND DOWN EXPOSED SOIL SLOPES ON FINAL
PASS, LEAVING TRACK GROOVES PERPENDICULAR TO THE SLOPE. DO NOT BACK -BLADE.
LEAVE A SURFACE ROUGH TO MINIMIZE EROSION.
17. ALL AREAS DISTURBED BY CONSTRUCTION SHALL BE STABILIZED FROM EROSION WITHIN
15 DAYS OF SUBSTANTIAL COMPLETION OF GRADING IN THAT AREA. TEMPORARY SEED
AND MULCH SHALL COVER ALL EXPOSED SOILS IF GRADING COMPLETION IS DELAYED
LONGER THAN 15 DAYS. PERMANENT SEED AND MULCH IS REQIURES WITHIN 15 DAYS OF
COMPLETION OF FINAL GRADING.
18. GENERAL TEMPORARY SEED SHALL BE MNDOT MIX 190 @ 100 LBS. PER ACRE OR
APPROVED EQUAL. PERMANENT SEED SHALL BE MNDOT MIX 270 @ 120 LBS PER ACRE
OR APPROVED EQUAL. (PLANTING DATES PER SPEC 2575) MULCH SHALL BE MNDOT
TYPE 1 (CLEAN OAT STRAW) @ 2 TONS PER ACRE AND DISK ANCHORED IN PLACE OR
APPROVED EQUAL. FERTILIZER SHALL BE 80-80-80 NPK PER ACRE. (UNLESS P
RESTRICTIONS APPLY) AND INCORPORATED INTO THE SEED BED.
19. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE PROPERLY
DISPOSED OF WITHIN THIRTY (30) DAYS AFTER FINAL SITE STABILIZATION IS ACHIEVED
OR AFTER THE TEMPORARY MEASURES ARE NO LONGER NEEDED.
20. REPORT ALL FOUND FIELD TILES TO THE ENGINEER FOR EVALUATION.
21. CHANNELIZED RUNOFF FROM ADJACENT AREAS RUNNING THROUGH THE SITE SHALL BE
DIVERTED AROUND DISTURBED AREAS, IF PRACTICAL, DIVERTED RUNOFF SHALL BE
CONVEYED IN A MANNER THAT WILL NOT ERODE THE CONVEYANCE AT RECEIVING CHANNELS,
ALL TEMPORARY OR PERMANENT DRAINAGE CHANNELS MUST BE STABILIZED WITHIN
24 HOURS OF BEING CONNECTED TO A WATER OF THE STATE. SEDIMENT CONTROL IS REQUIRED
ALONG CHANNEL EDGES TO REDUCE SEDIMENT REACHING THE CHANNEL.
22. ALL ACTIVITIES ON THE SITE SHALL BE CONDUCTED IN A LOGICAL SEQUENCE TO MINIMIZE THE
AREA OF BARE SOIL EXPOSED AT ANY ONE TIME.
23. ALL DISTURBED GROUND LEFT INACTIVE FOR 14 OR MORE DAYS MUST HAVE TEMPORARY OR
PERMANENT STABILIZATION TEAR ROUND.
24. FOR SITES WITH MORE THAN TEN ACRES DISTURBED AT ONE TIME, OR IF A CHANNEL
ORIGINATES IN THE DISTURBED AREA, ONE OR MORE TEMPORARY OR PERMANENT
SEDIMENTATION BASINS SHALL BE CONSTRUCTED. EACH SEDIMENTATION BASIN SHALL HAVE A
SURFACE AREA OF AT LEAST ONE PERCENT OF THE AREA DRAINING TO THE BASIN AND AT
LEAST THREE FEET OF DEPTH AND CONSTRUCTED IN ACCORDANCE WITH ACCEPTED DESIGN
SPECIFICATIONS. SEDIMENT SHALL BE REMOVED TO MAINTAIN A DEPTH OF THREE FEET. THE
BASIN DISCHARGE RATE SHALL ALSO BE SUFFICIENTLY LOW AS TO NOT CAUSE EROSION ALONG
THE DISCHARGE CHANNEL OR THE RECEIVING WATER.
25. PERIMETER SEDIMENT CONTROL MEASURES SHALL BE PLACED ALONG ALL DOWN GRADIENT
PERIMETERS OF THE SITE. IF A CHANNEL OR AREA OF CONCENTRATED RUNOFF PASSES
THROUGH THE SITE, PERIMETER SEDIMENT CONTROL MEASURES SHALL BE PLACED ALONG
SITE DEWATERING PRACTICES: THE CHANNEL EDGES TO REDUCE SEDIMENT REACHING THE CHANNEL, ALL DOWN GRADIENT
1. WATER PUMPED FROM THE SITE SHALL BE TREATED BY TEMPORARY SEDIMENTATION BASINS,
GRIT CHAMBERS, SAND FILTERS, UPFLOW CHAMBERS, HYDROCYCLONES, SWIRL CONCENTRATORS
OR OTHER APPROPRIATE CONTROLS AS APPROPRIATE. ALL WATER FROM DEWATERING MUST
BE DISCHARGED IN A MANNER THAT DOES NOT CAUSE NUISANCE CONDITIONS, EROSION IN
RECEIVING CHANNELS OR ON DOWNSLOPE PROPERTIES, OR INUNDATION IN WETLANDS
CAUSING SIGNIFICANT ADVERSE IMPACT TO THE WELAND.
2. ALL DISCHARGE POINTS MUST BE ADEQUATELY PROTECTED FROM EROSION AND SCOUR. THE
DISCHARGE MUST BE DISPERSED OVER NATURAL ROCK RIPRAP, SAND BAGS, PLASTIC SHEETING
OR OTHER ACCEPTED ENERGY DISSIPATION MEASURES. ADEQUATE SEDIMENTATION CONTROL
MEASURES ARE REQUIRED FOR DISCHARGE WATER THAT CONTAINS SUSPENDED SOLIDS.
FINAL STABILIZATION:
THE CONTRACTOR MUST ENSURE FINAL STABILIZATION OF THE SITE. THE CONTRACTOR MUST
SUBMIT A NOTICE OF TERMINATION (NOT) WITHIN 30 DAYS AFTER FINAL STABILIZATION IS COMPLETE,
OR ANOTHER OWNER/OPERATOR (PERMITEE) HAS ASSUMED CONTROL OF ALL AREAS OF THE SITE
THAT HAVE NOT UNDERGONE FINAL STABILIZATION. FINAL STABILIIZATION CAN BE ACHIEVED IN ONE
OF THE FOLLOWING WAYS:
ALL SOIL DISTURBING ACTIVITIES AT THE SITE HAVE BEEN COMPLETED <t4D ALL SOILS MUST BE
STABILIZED BY A UNIFORM PERENNIAL VEGETATIVE COVER WITH A DENS; 1`Y OF 70 PERCENT OVER
THE ENTIRE PERVIOUS SURFACE AREA, OR OTHER EQUIVALENT MEAN: NECESSARY TO PREVENT
SOIL FAILURE UNDER EROSIVE CONDITIONS AND:
A. ALL DRAINAGE DITCHES, CONSTRUCTED TO DRAIN WATER FROM T HE SITE AFTER CONSTRUCTIO
IS COMPLETE, MUST BE STABILIZED TO PRECLUDE EROSION;
B. ALL TEMOPRARY SYNTHETIC, AND STRUCTURAL EROSION PREVENTION AND SEDIMENT BMPS
(SUCH AS SILT FENCE) MUST BE REMOVED AS PART OF THE SITE FINAL STABILIZATION;
C. THE CONTRACTORS MUST CLEAN OUT ALL SEDIMENT FROM CONVEYANCES AND FROM
TEMPORARY SEDIMENT BASINS THAT ARE TO BE USED AS PERMANENT WATER QUALITY
MANAGEMENT BASINS. SEDIMENT MUST BE STABILIZED TO PREVENT IT FROM BEING
WASHED BACK INTO THE BASIN, CONVEYANCES OR DRAINAGE WAYS DISCHARGING
OFF-SITE OR TO SURFACE WATERS. THE CLEAN OUT OF PERMANENT BASINS MUST BE
SUFFICIENT TO RETURN THE BASIN TO DESIGN CAPACITY.
PERIMETER SEDIMENT CONTROL MEASURES MUST INCLUDE A MAINTENANCE AND INSPECTION
SCHEDULE.
26. ANY SOIL OR DIRT STORAGE PILES CONTAINING MORE THAN TEN CUBIC YARDS OF MATERIAL
SHOULD NOT BE LOCATED WITHIN 25 FEET FROM A ROADWAY OR DRAINAGE CHANNEL. IF
REMAINING FOR MORE THAN 14 DAYS, THEY SHALL BE STABILIZED BY MULCHING VEGETATIVE
COVER, TARPS OR OTHER MEANS AND ENCLOSED WITH DOWN GRADIENT PERIMETER SEDIMENT
CONTROLS. PILES WHICH WILL BE IN EXISTENCE FOR LESS THAT 14 DAYS SHALL BE ENCLOSED
WITH PERIMETER SEDIMENT CONTROLS.
27, PIPE OUTLETS MUST HAVE ENERGY DISSIPATION INSTALLED WITHIN 24 HOURS OF CONNECTION
TO WATERS OF THE STATE.
SEDIMENT CONTROL PRACTICES:
1. SEDIMENT CONTROL PRACTICES MUST MINIMIZE SEDIMENT FROM ENTERING SURFACE WATERS,
INCLUDING CURB AND GUTTER SYSTEMS AND STORM INLETS.
2. SEDIMENT CONTROL PRACTICES MUST BE ESTABLISHED ON ALL DOWN GRADIENT PERIMETERS
BEFORE ANY UPGRADIENT LAND DISTURBING ACTIVITIES BEGIN. THESE PRACTICES SHALL REMAIN
IN PLACE UNTIL FINAL STABILIZATION HAS BEEN ESTABLISHED.
3. THE TIMING OF THE INSTALLATION OF SEDIMENT CONTROL PRACTICES MAY BE ADJUSTED TO
ACCOMMODATE SHORT-TERM ACTIVITIES SUCH AS CLEARING OR GRUBBING, OR PASSAGE OF
VEHICLES. ANY SHORT-TERM ACTIVITY MUST BE COMPLETED AS QUICKLY AS POSSIBLE AND THE
SEDIMENT CONTROL PRACTICES MUST BE INSTALLED IMMEDIATELY AFTER THE ACTIVITY IS
N COMPLETED HOWEVER, SEDIMENT CONTROL PRACTICES MUST BE INSTALLED BEFORE THE NEXT
PRECIPITATION EVENT EVEN IF THE ACTIVITY IS NOT COMPLETE.
4. ALL STORM DRAIN INLETS MUST BE PROTECTED BY APPROPRIATE BMPS DURING CONSTRUCTION
UNTIL ALL SOURCES WITH POTENTIAL FOR DISCHARGING INTO THE INLET HAVE BEEN ESTABLISHED.
5. TEMPORARY SOIL STOCKPILES MUST HAVE SILT FENCES 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.
ONO" copt
EROSION AND SEDIMENT CONTROL
INSPECTIO PROGRAM:
THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONDUCTING INSPECTIONS OF ALL EROSION
AND SEDIMENT CONTROL BMP'S ON SITE. INSPECTIONS AND RAINFALL ON SITE MUST BE
DOCUMENTED AND READILY AVAILABLE FOR REVIEW. INSPECTIONS ARE REQUIRED AS FOLLOWES:
1. ONCE EVERY SEVEN DAYS ON EXPOSED SOIL AREAS.
2. WITHIN 24 HOURS AFTER A ONE-HALF INCH OR GREATER RAIN EVENT OVER 24 HOURS.
3. ONCE EVERY 30 DAYS ON STABILIZED AREAS.
4. AS SOON AS RUNOFF OCCURS OR PRIOR TO RESUMING CONSTRUCTION ON FROZEN GROUND.
E�71RO ION AND SEDIMENT CONTROL
AINENANCE PROGRAM:
1. WHEN SEDIMENT REACHES 1/3 THE HEIGHT OF THE BMP ON PERIMETER CONTROL DEVICES,
SEDIMENT MUST BE REMOVED WITHIN 24 HOURS OF DISCOVERY.
2. IF THE PERIMETER CONTROL DEVICE IS NOT FUNCTIONAL IT MUST BE REPAIRED OR REPLACED
WITHIN 24 HOURS OF DISCOVERY.
3. TEMPORARY SEDIMENT BASINS SHALL BE MAINTAINED WHEN SEDIMENT REACHES 1/2 THE
OU`i LET HEIGHT OR 1/2 THE BASIN STORAGE VOLUME. BASINS MUST BE DRAINED OR SEDIMENT
REMOVED WITHIN 72 HOURS OF DISCOVERY.
4. SEDIMENT MUST BE REMOVED FROM PAVED SURFACES WITHIN 24 HOURS OF DISCOVERY.
5. EROSION INTO STREETS. WETLANDS OR WATER BODIES:
A. IF ERODED SOILS (INCLUDING TRACKED SOILS FROM CONSTRUCTION ACTIVITIES) ENTER OR
APPEAR LIKELY TO ENTER STREETS, WETLANDS, OR OTHER WATER BODIES, PREVENTION
STRATEGIES, CLEANUP AND REPAIR MUST BE IMMEDIATE WITH THE APPROPRIATE APPROVALS
FROM THE DNR, MPCA, OR ANY OTHER STATE, FEDERAL, OR LOCAL AGENCIES AS NECESSARY.
THE OWNER SHALL PROVIDE ALL TRAFFIC CONTROL AND FLAGGING REQUIRED TO PROTECT
THE TRAVELING PUBLIC DURING CLEANUP OPERATIONS.
6. EROSION OFF-SITE:
A. IF EROSION BREACHES THE PERIMETER OF THE SITE, THE OWNER SHALL IMMEDIATELY
DEVELOP A CLEANUP AND RESTORATION PLAN, OBTAIN RIGHT -OF -ENTRY FROM THE ADJOINING
PROPERTY OWNER AND GET APPROPRIATE APPROVALS FROM ALL STATE, FEDERAL, AND
LOCAL AGENCIES AS NECESSARY. THEN IMPLEMENT THE CLEANUP AND RESTORATION PLAN
WITHIN 48 HOURS OF OBTAINING THE ADJOINING PROPERTY OWNER'S PERMISSION AND
APPROVAL FROM ANY APPROPRIATE STATE, FEDERAL, AND LOCAL AGENCIES.
CONSTRUCTION SITE PRACTICES:
1. WASTE AND MATERIAL DISPOSAL:
A. ALL WASTE, UNUSED BUILDING MATERIAL (INCLUDING GARBAGE DEBRIS, CLEANING
WASTES, WASTEWATER, TOXIC MATERIALS OR HAZARDOUS MATERIALS), COLLECTED
SEDIMENT, ASPHALT AND CONCRETE MILLINGS, FLOATING DEBRIS, PAPER, PLASTIC,
FABRIC, CONSTRUCTION AND DEMOLITION DEBRIS AND OTHER WASTES MUST BE PROPERLY
CONTAINED ON SITE AND DISPOSED OF OFF SITE, NOT ALLOWED TO BE CARRIED BY
RUNOFF INTO RECEIVING CHANNEL OR STORAGE SEWER SYSTEM.
2. HAZARDOUS MATERIALS:
A. OIL, GASOLINE, PAINT AND ANY HAZARDOUS SUBSTANCES MUST BE PROPERLY STORED,
INCLUDING SECONDARY CONTAINMENT, TO PREVENT SPILL, LEAKS, OR OTHER DISCHARGE.
B. RESTRICTED ACCESS TO STORAGE AREAS MUST BE PROVIDED TO PREVENT VANDALISM.
C. CONCRETE WASH MUST BE LIMITED TO A DEFINED AREA OF THE SITE AND RUNOFF MUST
MUST BE CONTAINED WITHIN THE DEFINED AREA.
D. STORAGE OF HAZARDOUS WASTE MUST BE IN COMPLIANCE WITH MPCA
REGULATIONS.
3. LIQU'D WASTE:
A. ALL NON STORMWATER DISCHARGES (CONCRETE TRUCK WASHOUT, VEHICLE
WASHING, MAINTENANCE SPILLS, ETC. CONDUCTED DURING THE CONSTRUCTION
ACTIVITY MUST COMPLY WITH THE NEWEST VERSION OF THE STATE NPDES PERMIT.
4. SANITARY FACILITIES:
A. ACEQUATE ON-SITE SANITARY FACILITIES SHALL BE PROVIDED IN CONVENIENT
LOCATION(S) FOR ALL PERSONS WHO WORK ON THE SITE.
5. TRACKING:
A. EACH SITE SHALL HAVE GRAVELED ROADS, ACCESS DRIVES AND PARKING AREAS OF
SUFFICIENT WIDTH AND LENGTH TO PREVENT SEDIMENT FROM BEING TRACKED ONTO
PUBLIC OR PRIVATE ROADWAYS.
B. ANY SEDIMENT REACHING A PUBLIC OR PRIVATE ROAD SHALL BE REMOVED BY STREET
CLEANING BEFORE THE END OF EACH WORKDAY.
6. DRAIN INLET PROTECTION:
A. ALL STORM DRAIN INLETS SHALL BE PROTECTED DURING CONSTRUCTION WITH CONTROL
MEASURES AS APPROVED BY THE CITY.
B. THESE DEVICES SHALL REMAIN IN PLACE UNTIL FINAL STABILIZATION OF THE SITE.
C. A REGULAR INSPECTION AND MAINTENANCE PLAN SHALL BE DEVELOPED AND IMPLEMENTED
TO ASSURE THESE DEVICES ARE OPERATIONAL AT ALL TIMES.
7. 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 ON SITE.
GRACING GENERAL NOTES:
1. PRIOR TO INITIAL GRADING, THE CONTRACTOR IS RESPONSIBLE TO MAKE SURE ALL REQUIRED
PERMITS AND APPROVALS HAVE BEEN OBTAINED.
2. ABSOLUTELY NO CONSTRUCTION, GRADING, OR FABRICATION SHALL BEGIN UNTIL:
A. THE CONTRACTOR HAS RECEIVED AND THOROUGHLY REVIEWED ALL PLANS
AND OTHER DOCUMENTS APPROVED BY ALL OF THE PERMITTING AUTHORITIES,
B. ALL NECESSARY BMP'S ARE INSTALLED.
3. GOPHER STATE ONE CALL (800) 252 - 1166, MUST BE NOTIFIED 48 HOURS PRIOR TO
START OF CONSTRUCTION.
4. ROCK CONSTRUCTION ENTRANCES (PER THE STANDARD DETAIL PLATE) MUST BE
PROVIDED AT ALL CONSTRUCTION SITE ACCESS POINTS.
5. TE,APORARY SEDIMENT POND(S) MUST BE ESTABLISHED IN INITIAL PHASE IN ORDER
TO CAPTURE RUNOFF DURING GRADING OF THE CONSTRUCTION SITE.
6. ALI. IMPROVEMENTS TO CONFORM TO CITY AND COUNTY'S LATEST STANDARDS
SPECIFICATION.
7. TOPSOIL MUST BE STRIPPED PRIOR TO ANY CONSTRUCTION, REUSE STOCKPILE ON SITE.
8. IMMEDIATELY FOLLOWING GRADING OF (3:1 OR GREATER) SIDE SLOPES AND DRAINAGE
SWALES, WOOD FIBER BLANKET OR OTHER APPROVED SOIL STABILIZING METHOD
(APPROVED BY ENGINEER) MUST BE APPLIED OVER SEED MIXTURE WITH A MINIMUM OF
4" *TOPSOIL.
9. ALL FINISHED GRADES MUST SLOPE AWAY FROM PROPOSED BUILDINGS AT MINIMUM
GRADE OF 2.0%.
10. CONTRACTOR IS REQUIRED TO KEEP A COPY OF THE EROSION CONTROL PLAN ON SITE,
AT ALL TIMES.
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