TM 5-814-7
Table 6-5. Requirements for Surface Water Run-on and Run-off Control Systems
Section of 40 CFR 264 Describing Requirements
K
L
M
N
Design Requirements
Surface Impoundments
Waste Pile
Land Treatment
Landfill
Design, construct, operate and maintain a run-on
control system capable of preventing flow onto the
active portion of the treatment zone during peak
discharge from at least a 25-year
storm.
NA
264.251(c) a
264.273(c) b
264.301(c) a
Design, construct, operate and maintain a run- off
management system to collect and control (at a
minimum) the water volume resulting from a 24-
hour,
25-year storm
NA
264.251(d) C
264.273(d)C
264.301(d)
Design, construct, maintain and operate to prevent
overtopping or overfilling by wind and wave action,
rainfall and
run-on
264.221(c)
NA
NA
NA
Collection and holding facilities for run-off
control systems must be emptied or otherwise
managed after storms to maintain design capacity
of the
system.
NA
264.251(e)
264.273(e)
264.301(e)
While in operation, inspect weekly and after storms
to detect evidence of deterioration, malfunctions, or
improper operation of run-on and run-off control
systems
264.226(b)(1)d
264.254(bX1)
264.273(c)
264.303(bX1
After closure, maintain the run-on control system
NA, unless
NA, unless
and the run-off management
system.
closed as a
closed as a
264.280(3),(4)
264.310(bX5)d
landfill
landfill
264.280(cX3),(4)
a The active portion.
b The treatment zone.
c Does not state that this pertains to the active portion; however, it is assumed to be such.
d This subsection of 40 CFR 264 indirectly applies.
Adapted from 40 CFR 264
ins and run-off
(1) Typical examples of conveyance facilities, as
retention basins
c. Run-on control systems. Drainage berms,
well as erosion control measures, are provided in EPA
600/2-79-165, section 10. Examples of standard surface
ditches and overside drains or spillways can be selected
water control facilities, along with design procedures for
and designed to prevent flow onto the active portion of
their selection, design and construction, are provided in
waste units during peak discharges from specified return
the Engineering Field Manual for Conservation Practices
storms. Drainage swales and ditches with berms can be
published by the US Department of Agriculture, Soil
located to intercept and convey water run-on flows
Conservation Service (SCS). Examples of conveyance
around hazardous waste sites and around waste units
facilities used for run-on and runoff control at hazardous
within the site. To reduce the potential for erosion and
waste units are shown in figures 6-6 through 6-8 and
minimize maintenance, spillways or overside drain
described below. These figures show grass areas with
systems should be considered for steep ditch reaches
slopes of 2:1; note, however, that any vegetated final
and where collected flows must be carried down slopes
slope areas to be tractor mowed should have slopes no
for discharge.
greater than 3:1.
(1) If there is any chance that overflows could
damage constructed elements of waste units or enter
2) Examples of barrier
conveyance
and
active operation areas, they should be sized for carrying
detention/retention systems include:
peak flows from storms with return frequencies upwards
to 100 years.
Erosion control measures for the
Barriers:
berms, dikes
conveyance system should be evaluated and selected to
Conveyance:
swales, ditches, channels, pipe
minimize maintenance over the anticipated service life.
cross drains and over- side drains
As described in paragraph 6-5d(2), conveyance systems
with inlet and outlet appurtenances;
developed for the waste unit perimeter to intercept run
pipedrop inlets, hooded inlets, drop
on may also be used to intercept run off from closed
and chute spillway structures
areas, if the surface water does not require retention.
Detention/retention:
sedimentation control bas-
6-15
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