NOI certification
A completely dry sediment trap is more efficient than one containing some depth of water
True
False - ANS-False
A concrete washout structure:
must have at least 4" of freeboard at all times
may be prefabricated or constructed on site
must be lined with impervious material
is typically 10'x10'x3'
all of the above - ANS-all of the above
A contractor may work outside the limit of disturbance shown on an approved plan without prior
approval provided additional sediment controls are installed.
true
false - ANS-false
A filter bag must be replaced when it
becomes full of sediment
the geotextile becomes clogged
the bag develops a rip or tear
any of the above - ANS-any of the above
A grading unit as it pertains to Maryland regulations is
10 acres
20 acres
35 acres
50 acres - ANS-20 acres
A mountable berm is typically used where an earth dike needs to be traversed by construction
equipment
True
False - ANS-True
A NOI must be submitted and coverage obtained under the NPDES General Permit for
Construction Activity for any construction site that disturbs:
5,000 square feet or more
1 acre or more
½ acre or more
5 acres or more - ANS-1 acre or more
,A perimeter dike/swale -1 (PDS-1) can be used as a clear water diversion when:
the drainage area is less than two acres
the drainage area is less than one acre
the slope of the drainage area is less than 10%
a PDS-1 is never allowed as a clear water diversion - ANS-a PDS-1 is never allowed as a clear
water diversion
A pre-construction meeting is:
a discussion of the permit process only
the time a developer submits the NOI for the project
a meeting between the inspector and the developer/contractor to review the approved erosion &
sediment control plan and discuss implementation
all of the above. - ANS-a meeting between the inspector and the developer/contractor to review
the approved erosion & sediment control plan and discuss implementation
A primary goal of ESD is to
limit new development as much as possible
mimic natural runoff conditions when developing a site
provide additional jobs for engineers and plan reviewers
none of the above - ANS-mimic natural runoff conditions when developing a site
A sediment trap can be created by excavation, formed by an embankment, or a combination of
both.
True
False - ANS-True
A sediment trap may be used as a concrete washout facility.
True
False - ANS-false
A sediment trap or basin can be an acceptable dewatering practice.
True
False - ANS-true
A soil test is required prior to permanent stabilization on a site with a disturbed area greater than
five acres.
True
False - ANS-True
A stabilized construction entrance:
is made up of Class I riprap or equivalent recycled concrete.
uses nonwoven geotextile underneath the stone/recycled concrete.
should slope toward the exterior of the site so runoff from SCE flows offsite.
none of the above - ANS-uses nonwoven geotextile underneath the stone/recycled concrete.
, A stop-work order can not be issued for a construction project without first issuing a warning, as
progressive enforcement is required by all enforcement agencies.
true
false - ANS-False
A storm drain diversion may discharge to silt fence.
True
False - ANS-False
A temporary earth dike is differentiated from a temporary swale on a plan sheet by:
dikes and swales use a different lettering system to denote their type.
dikes and swales use a different numbering system to denote flow channel stabilization
a dike is shown with a single arrow and a swale with a double arrow as its standard symbol
they will be denoted in the same manner as they are interchangeable
none of the above - ANS-a dike is shown with a single arrow and a swale with a double arrow
A temporary sediment basin or trap is designed to:
reduce the number of lots available for development on a project
detain sediment-laden water allowing sediment to settle out prior to discharge of runoff
Reduce the discharge of a 10 year storm event
all of the above - ANS-detain sediment-laden water allowing sediment to settle out prior to
discharge of runoff
A temporary sump pit is designed for durations of ________ or less.
one month
three months
four months
six months - ANS-three months
Accumulated sediment must be removed from behind a Temporary Stone Outlet Structure when
the sediment deposition is within ______ of weir crest:
5 inches
6 inches
7 inches
8 inches - ANS-6 inches
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