CITY OF DES PLAINES GENERAL SPECIFICATIONS EROSION CONTROL

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CITY OF DES PLAINES

GENERAL SPECIFICATIONS

EROSION CONTROL



EROSION CONTROL NOTES


The Erosion Control Plan will follow standards and recommendations in accordance with the
“Standard And Specifications For Soil, Erosion, And Sedimentation Control”, latest

edition,
published by the Illinois Environmental Protection Agency and “Procedures And Standards For
Urban Soil Erosion And Sedimentation Control”, latest edition, by the Northeastern Illinois Soil
Erosion and Sedimentation Control Steering Committee.


Th
e General Contractor is responsible for the development and implementation of the Erosion
Control Plan. All construction activities will adhere to the requirements set forth in the IEPA
National Pollutant Discharge Elimination System (NPDES) Stormwater Pe
rmit.


The Contractor is responsible for proper installation, inspection, maintenance, and removal of all
temporary and permanent erosion control devices per the Erosion Control Plan and as directed by the
Engineer. The Contractor shall provide qualified p
ersonnel to inspect disturbed areas, outside storage
areas, vehicular exit locations, and erosion and sediment control devices at least once every 7
calendar days and within 24 hours following a minimum 0.5 inches storm or equivalent snowfall.


The Contr
actor shall prepare a written inspection report detailing the names and qualification of
inspection personnel, date of inspection, major observations relating to the implementation of a
stormwater pollution prevention plan, actions taken in accordance with

the NPDES Permit, and
photos of the erosion control devices which documents the presence and effectiveness of the devices.
This report shall be made and retained by the Contractor as part of the Stormwater Pollution
Prevention Plan for at least 3 years fo
llowing completion of the project. The Contractor shall
provide copies of these reports to the City of Des Plaines or the IEPA upon request.


The Contractor shall maintain all control measures in good working order. If a repair is necessary, it
shall be
initiated within 24 hours and completed within 7 calendar days following the initial
inspection.


At silt fence and rectangular inlet protection locations, the Contractor shall inspect the sediment
depth, stability of posts, silt fabric for its condition a
nd security to posts. Remove and replace
damaged fabric and posts and remove sediment when it accumulates to maximum ½ the fence
height.



At filter fabric inlet protection locations, the Contractor shall inspect the fabric for tears and
sediment depth.

Remove and replace damaged fabric and remove sediment when ½ full.


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At ditch check locations, the Contractor shall inspect the device for proper earth embedment,
sediment depth and amount of stone missing for evidence of washout. Remove sediment when it

has reached ½ the height of the ditch check and replace stone as needed.


At stone outlet structure sediment trap and sediment basin locations, the Contractor shall inspect
sediment depth and riprap missing for evidence of washout. Remove sediment when t
he structure is
50% full and prior to completion of the project and replace riprap as needed.


At stabilized construction exit locations, the Contractor shall inspect stone for sediment build up and
replace stone as needed. The Contractor shall enforce th
at all vehicles exit the construction site from
these locations. Public and private roadways shall be inspected for evidence of offsite sediment
tracking and will be kept free of stone, mud, soil, silt, etc. at all times. The Contractor shall clean the
pa
vement of all dirt and debris at the end of each workday, and at other times as directed by the
Engineer. If necessary, the Contractor shall provide vehicle wash down or under carriage wash off
facilities to prevent offsite tracking.


The Contractor shall

be responsible for controlling the dust and air
-
borne dirt generated by
construction activities and adhere to the IDOT Standard Specifications for Road and Bridge
Construction, Section 107.36, Dust Control.


Upon completion of grading operations, all dist
urbed areas will be spread with topsoil and seeded or
sodded immediately. Erosion control blanket will be utilized immediately over seed to stabilize the
soil and promote the growth of grass.


The Contractor shall first obtain permission from the Engineer

prior to removing any erosion control
device for construction purposes. The erosion control device shall be removed and replaced on the
same day, if practical.


During construction, water pumped or otherwise discharged from the site shall be filtered.


P
rior to the project’s completion, the Contractor shall inspect and clean the storm sewer system free
of sedimentation and debris. Sedimentation and debris shall not be permitted to be washed away
through the storm sewer system but shall be physically remo
ved by vacuum and jetting methods.