ELEMENTS OF AN EFFECTIVE
SEDIMENT CONTROL PLAN
DESIGN APPROACHTHE BASICS
Issued May 2009
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OBJECTIVE
THE BEST EROSION, SEDIMENTATION
AND POLLUTION CONTROL PLANS
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STEPS TO AN EFFECTIVE EROSION,
SEDIMENTATION & POLLUTION CONTROL PLAN
1.
2.
3.
4.
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6.
7.
Project requirements
Project/resources description
Data collection
Data interpolation
Plan preparation
Implementation
Operations & maintenance
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THE BASICS
1. REQUIREMENTS OF A GOOD PLAN
2. COMPONENTS OF A GOOD PLAN
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REQUIREMENTS
1. MEET REQUIREMENTS OF GESA
2. MEET REQUIREMENTS OF GENERAL
PERMIT
3. MEET FEDERAL REGULATIONS
4. MEET LIA REQUIREMENTS
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NPDES Requirements
DESIGN A 3 PHASE ES&PC PLAN
• Initial Phase (Clearing & Grubbing)
• Intermediate Phase (Grading & Drainage)
• Final Phase (Final Stabilization)
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EXAMPLE PLAN CLEARING PHASE
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Establish clearing limits
Locate state waters/wetlands
Establish perimeter protection
Provide the required initial storage
Observe sensitive soil areas
Establish construction exits
Define special BMP requirements
Generation of dust shall be eliminated or
minimized to the maximum extent practical
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CLEARING PHASE
• Define sub phases if required
• Establish full implementation of sediment
ponds
• Make adjustments if required
• Define critical work zones
• Establish locations of concentrated &
sheet discharge
• Maintain full coordination between the
contractor, design professional and the
regulatory inspector regarding project
sequence
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SEDIMENT PONDS
• Design as per requirements based on sub
basin size, soils, etc.
• Divert offsite flows around disturbed areas
and sediment basins if possible
• Provide construction details as necessary
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CLEARING PHASE
• Prior to the land disturbing activity, the
contractor should schedule a
preconstruction meeting with the area site
development inspector.
• No staging areas, material storage,
concrete wash out areas, or debris burn
and burial holes should be located within
500 ft. of designated tree protection areas
or stream buffers.
• A copy of the approved land disturbance
plan and permit shall be present on the
site at all times. Post on day one.
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CLEARING PHASE
• Prior to commencing land disturbance
activity, the limits of land disturbance
should be clearly and accurately
demarcated with stakes, ribbons, or other
appropriate means. The location and
extent of all authorized land disturbance
activity should be demarcated for the
duration of the construction activity. No
land disturbance shall occur outside the
approved limits indicated on the approved
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plans.
CLEARING PHASE
• Prior to any other construction, a stabilized
construction entrance/exists, all perimeter
controls and sediment storage devices shall
be constructed at each point of entry to or
exit from the site or onto any public
roadway as shown on plans.
• Immediately after the establishment of
construction entrance/exits, all perimeter
erosion control and stormwater
management devices shall be installed as
shown on the clearing phase ES&PC Plan.14
CLEARING PHASE
• Silt fence should be installed at the
perimeter of the disturbed area as shown
on the plan. Silt should be removed when
accumulation reaches ½ height of the
barrier. The perimeter silt fence should
be inspected weekly and after qualifying
rain events for any failures. Any failures
of said fencing should be repaired
immediately.
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CLEARING PHASE
• Inlet sediment protection measures shall
be installed on all existing storm
structures as shown on the plan.
• Stone check dams shall be installed in
areas of concentrated flows as shown on
the plan.
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CLEARING PHASE
• Tree protection fencing and stream buffer
limits should be installed prior to the start
of any land disturbance activity and
maintained until final landscape is
installed. The tree protection fencing
should be inspected daily. Any failures of
said fencing should be repaired
immediately.
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CLEARING PHASE
• For common developments that begin
construction activity after the effective date of this
permit, the primary permittee and tertiary
permittee(s) must retain the design professional
(DP) who prepared the ES&PC Plan, except when
the permittee has requested in writing and EPD
has agreed to an alternate DP, to inspect the
installation of the initial sediment storage
requirements and perimeter control BMPs which
the DP designed within seven (7) days after
installation.
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CLEARING PHASE (cont)
• The DP shall determine if these BMPs have been
installed and are being maintained as designed.
The DP shall report the results of the inspection to
the permittee within seven (7) days and the
permittee must correct all deficiencies within two
(2) business days of receipt of the inspection
report from the DP unless weather related site
conditions are such that additional time is
required.
Gar 100003 Part IV.A.5.
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CLEARING PHASE
• After approval of the initial erosion control
installation, the contractor may proceed
with clearing and grubbing activities. As
clearing permits, the contractor shall
construct temporary sediment ponds and
diversion dikes as shown on the clearing
phase plan to control erosion and
stormwater runoff.
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CLEARING PHASE
• Mulch or temporary grassing shall be
applied to all exposed areas within 14
days of land disturbance (LIAs may
require ground cover be applied in less
14 days).
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CLEARING PHASE
• Permittees shall inspect control measures as
required by NPDES
• Erosion control measures will be maintained at
all times. If full implementation of the approved
plan does not provide for effective erosion
control, additional erosion and sediment control
measures shall be implemented to control or
treat the sediment source as directed by the
onsite inspector or design professional.
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CLEARING PHASE
• Failure to properly install, operate, or
maintain all erosion control measures can
result in all construction being stopped on
the job until such measures are corrected
back to the approved erosion control
plans, i.e., mandatory stop work order!
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GRADING & DRAINAGE PHASE
• Establish diversion dikes
• Define mulching, temporary stabilization
measures
• Define critical work zones
• Define special BMPs/methods
• Maintain communication with
contractor/inspector
• Generation of dust shall be eliminated or
minimized to the maximum extent practical
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GRADING & DRAINAGE PHASE
• During construction, the contractor should
maintain careful scheduling and
performance to ensure that land stripped
of its natural ground cover is exposed only
in small quantities and therefore limited
durations, before permanent erosion
protection is established.
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GRADING & DRAINAGE PHASE
• Maintain full coordination with the design
professional, contractor and regulatory
inspector at all times regarding project
sequence.
• Earthwork operations in the vicinity of
stream buffers should be carefully
controlled to avoid dumping or sloughing
into the buffer areas.
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GRADING & DRAINAGE PHASE
• Sediment shall not be washed into inlets.
It shall be removed from the sediment
traps and disposed of and stabilized so
that it will not enter the inlets again.
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GRADING & DRAINAGE PHASE
• All slopes steeper than 2.5:1 and with a
height of 10 ft. or greater, and cuts and
fills within stream buffers, shall be
stabilized with appropriate erosion control
matting or blankets.
• Appropriate silt fence shall be placed at
the toe of all dirt stock pile areas.
• Inlet sediment protection measures shall
be installed on all storm structures as they
are constructed.
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GRADING & DRAINAGE PHASE
• Storm drain outlet protection shall be placed at
all outlet headwalls as soon as the headwall is
constructed.
• Stone check dams shall be installed in areas of
concentrated flows as shown on the plan.
• Mulch or temporary vegetation shall be applied
to all exposed areas within 14 days of land
disturbance. Note local requirements
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GRADING & DRAINAGE PHASE
• Sediment and erosion control measures
should be checked weekly and after each
qualifying rain event. Each device is to be
maintained if sediment accumulation has
reached ½ the capacity of the device. 1/3 of
the storage capacity of temporary sediment
basin and retrofit structures
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GRADING & DRAINAGE PHASE
• The construction exit shall be maintained in
a condition which will prevent track or flow of
mud onto public right-of-way. This may
require periodic top dressing with 1.5”-3.5” of
stone, as conditions demand. All materials
spilled, dropped, washed or tracked from a
vehicle onto public roadway or into storm
drain must be removed immediately.
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GRADING & DRAINAGE PHASE
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Define sub phases as required
Redefine sedimentation ponds as required
Provide special details as required
Merge sedimentation ponds with
stormwater management facilities
• Utilize special BMPs as required
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FINAL PHASE
• Final vegetative measures
• Final structural measures
• Final stormwater systems
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FINAL PHASE
• Maintain full coordination with the design
professional, contractor and regulatory
inspector at all times regarding project
sequence.
• Sediment shall not be washed into inlets. It
shall be removed from the sediment traps and
disposed of and stabilized so that it will not
enter the inlets again.
• Mulch or temporary grassing shall be applied
to all exposed areas within 14 days of land
disturbance.
• Implement final stabilization.
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FINAL PHASE
• The contractor shall maintain all sediment
ponds and erosion control measures until
permanent ground cover is established.
Sediment shall be cleaned out of the ponds
when it reaches one third full.
• After curbing, graded aggregate base, and
pavement have been installed, all inlet
sediment traps on single and double wing
catch basins along with any curb inlets shall be
removed and replaced with curb filter inlet
protection.
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IMPORTANT COMPONENTS
• Notes – per phase
• Schedule
• Certifications
• Sediment pond design
• Details
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