REMEDIAL ACTION WORK PLAN OPERABLE UNIT 2, LANDFILL ...

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BMP: SILT FENCE
GENER4L DESCRJITION
A silt fence is made of a filter fabric which has ken entrenche~ attachd to supporting
poles, and smnetimes backed by a wire fence for su~fi The silt fence detains sediment-
Men water, promoting sedimentation behind the fence.
SUITABLE APPLICATIONS
m Along the pxi.meter of the site.
* Below the ~ of a cleared S1OP.
m A.tOngSWMUIS and ChaIInek.
m Around temp-ary swil areas.
m Across swat= with catchments lN than 1ame.
● Below other small clearwi areas.
iNSTALLATION/APPLICATION
“ Usepficipally in areas where sheet flow WLKS.
● Install along a ~vel c- w water dms not pnd more dmn 1.5 feet at any @nt.
. No more than 1 acre, 100 f~, or 0.5 cfs of concentrated flow should drain to any pint
atong the silt fence.
● Turn ends of fenm uphill.
● Provide area Ixhind the fence for runoff to wnd and sediment to settle (ap~x. 1200
sq. ft- ~ axe draining to the silt fence).
● Selectfilter fabricwhichretains85%of the soil+by weigh~basedon sieveanatysis,
but is not finer than an equivalent opmirtg size of 70.
REQUIREMENT’S
● Maintenance
. Inspct weekly and aftereach minfal.1.
. Re@r wherever fence is damaged.
. Remove sediment when it -h= 1~ the height of the fence.
● Cost (w- EPA, 1992)
Average annualcost for installation and maintenance (assumes 6 mmth useful
life> S7 ~r lineal fwt (S850 ~r drainage xre)
LIMITATIONS
● Do not use where 85% of the soil, by weigh~ passa througha No, 2(KIsieve bemuse
the filter fabric will clog.
● Do not place fence on a slo~, or wross any contour line.
● ~ not use in streams,chrmm!lsw anywhere flow has concenuated.
● ~ not u= in lwations where ptded water may muse fl-g.
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Objectives
Housekrnping Pmcticas
Contain Waste
Minimiza Dishvbad Ames
Stsbiliw Disturbed Amss
=
Pmtecf %pe#Channe/s
Targeted Pollutants
●
o
0 000
Sediim?nt
Nutrients
Toxic Materials
Oil & Gmwe
Fhatable Matertils
Other Construction
Waete
Implementation
Rquirsments
g Capital costs
Q o&Af coats
Q Aieintenatwe
O Tmining
o S#!l”iy~
, High 0 LOW
ESC50
Best
Ma@Smen
Practices
Construction Handbook 5-62 March, 1993
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