VA DEQ ESC INSPECTOR EXAM

VA DEQ ESC INSPECTOR EXAM

VESCPvf-vfanswer--VirginiavfErosionvfandvfSedimentvfControlvfProgram

-vfAdministeredvfbyvfcounties/citiesvf(must),vftownsvf(may)
-vfMUSTvfBEvfAPPROVED

MinimumvfStandardvf1vf-vfanswer--Stabilization

permanentvforvftemporaryvfsoilvfstabilizationvfshallvfbevfappliedvftovfdenudedvfareasvfwithinv
fsevenvfdaysvfaftervffinalvfgradevfisvfreachedvfonvfanyvfportionvfofvfthevfsite;vftemporaryvfsoilvf

stabilizationvfshallvfbevfappliedvfwithinvfsevenvfdaysvftovfdenudedvfareasvfthatvfmayvfnotvfbev
fatvffinalvfgradevfbutvfwillvfremainvfdormantvfforvflongervfthanvf14vfdays;vfpermanentvfstabiliz

ationvfshallvfbevfappliedvftovfareasvfthatvfarevftovfbevfleftvfdormantvfforvfmorevfthanvfonevfyear

SitevfNOTvfatvfFinalvfGradevf-vfanswer---vfstabilizevfinvf14vfdays
-vftemporarilyvfseed
-vfmulch
-vfpermanentlyvfstabilizevfifvfdormantvf>vf1vfyear

SitevfatvfFinalvfGradevf-vfanswer---vfstabilizevfinvf7vfdaysvf(recommendedvfimmediately)
-vfpermanentlyvforvftemporarilyvfseedvfandvfmulch
-vfmulch/matting/straw

MinimumvfStandardvf2vf-vfanswer--StockvfPiles,vfWastevfandvfBorrowvfAreas

duringvfconstruction,vfsoilvfstockvfpilesvfandvfborrowvfareasvfshallvfbevfstabilizedvforvfprotect
edvfwithvfsedimentvftrappingvfmeasures

mulchvfpreventsvferosionvfbyvfprotectingvfthevfsurfacevffromvfraindropvfimpactvfandvfsiltvffen
cevfinterceptsvfandvfdetainsvffromvfdisturbedvfareas

MinimumvfStandardvf3vf-vfanswer--PermanentvfVegetation

permanentvfvegetationvfcovervfshallvfbevfestablishedvfonvfdenudedvfareasvfnotvfotherwisevf
permanentlyvfstabilizedvf(permanentvfvegetationvfshallvfnotvfbevfconsideredvfestablishedvf
untilvfavfgroundvfcovervfisvfachievedvfthatvfisvfuniform,vfmaturevfenoughvftovfsurvive,vfandvfwi
llvfinhibitvferosionvf*therevfisvfnovf%vfassociatedvfwithvfthis*)vf

reducevferosionvfandvfdecreasevfsedimentvfyieldvffromvfdisturbedvfarea

thisvfisvfthevfstandardvfusedvftovfverifyvfthatvfavfsitevfisvfreadyvfforvfreleasevfofvfbondsvforvfsure
ty

MinimumvfStandardvf4vf-vfanswer--First-StepvfMeasures

,Sedimentvfbasinsvfandvftraps,vfperimetervfdikes,vfsedimentvfbarriersvfandvfothervfmeasure
svfintendedvftovftrapvfsedimentvfshallvfbevfconstructedvfasvfavffirstvfstepvfinvfanyvfland-
disturbingvfactivityvfandvfshallvfbevfmadevffunctionalvfbeforevfupslopevflandvfdisturbancevfta
kesvfplace

avfcertainvfamountvfofvfinitialvflandvfdisturbancevfmayvfbevfrequiredvftovfprovidevfaccessvfforvf
equipmentvftovfinstallvfthevfperimetervfcontrols,vfbutvfsitevfclearingvfandvfgradingvfshouldvfb
evfkeptvftovfavfminimumvfuntilvfthevfperimetervfcontrolsvfarevfinvfplace

interceptsvfandvfdetainsvfsmallvfamountsvfofvfsedimentvffromvfdisturbedvfareasvfduringvfcon
structionvfoperationvftovfpreventvfsedimentvffromvfleavingvfthevfsitevfandvfdecreasevfvelocit
yvfofvfsheetvfflowsvfandvflow-to-moderatevflevelvfchannelvfflow

PerimetervfControlsvf-vfanswer--
assuresvfthatvfsedimentvfdoesvfnotvfleavevfthevfperimetervfofvfthevfland-
disturbingvfareavfoncevfsitevfclearing,vfgrading,vfandvfconstructionvfcommences

Examples:vfsiltvffences,vfsedimentvftraps,vfsedimentvfbasins,vfconstructionvfentrance,vfte
mporaryvfdiversions,vfdiversions

MinimumvfStandardvf5vf-vfanswer--EarthenvfStructurevfStabilization

stabilizationvfmeasuresvfshallvfbevfappliedvftovfearthenvfstructuresvfsuchvfasvfdams,vfdikes,
vfandvfdiversionsvfimmediatelyvfaftervfinstallation



reducevferosionvfandvfsedimentationvfandvfreducevfdamagevffromvfsedimentvfandvfrunoffvft
ovfdownstreamvforvfoff-sitevfareas

MinimumvfStandardvf6vf-vfanswer--TrapsvfandvfBasins

sedimentvftrapsvfandvfbasinsvfshallvfbevfdesignedvfandvfconstructedvfbasedvfuponvfthevftota
lvfdrainagevfareavf(notvfjustvfdisturbedvfarea)vftovfbevfservedvfbyvfthevftrapvforvfbasin

SedimentvfTrapsvf-vfanswer--
minimumvfstoragevfcapacityvfshallvfbevf134vfcubicvfyardsvfpervfacrevfofvfdrainagevfareavfand
vfshallvfonlyvfcontrolvfdrainagevfareasvflessvfthanvf3vfacres



*stonevfoutletvf=vftrap*

SedimentvfBasinsvf-vfanswer--
surfacevfrunoffvffromvfdisturbedvfareasvfthatvfisvfcomprisedvfofvfflowvffromvfdrainagevfareasvf
greatervfthanvforvfequalvftovf3vfacresvfshallvfbevfcontrolledvfbyvfavfbasin;vfminimumvfstoragevf
capacityvfofvfavfsedimentvfbasinvfshallvfbevf134vfcubicvfyardsvfpervfacrevfofvfdrainagevfarea;vf
thevfoutfallvfsystemvfshall,vfatvfavfminimum,vfmaintainvfthevfstructuralvfintegrityvfofvfthevfbasi
nvfduringvfavf25-yearvfstormvfofvf24-
hourvfduration;vfrunoffvfcoefficientsvfusedvfinvfrunoffvfcalculationsvfshallvfcorrespondvftovfavf
barevfearthvfconditionvforvfthosevfconditionsvfexpectedvftovfexistvfwhilevfthevfsedimentvfbasi
nvfisvfutilized.

, SedimentvfTrappingvfDevisesvf-vfanswer--
1.vfplacevfnearvfthevflowestvfdrainagevfpointsvfofvfavfproject

2.vfinstallvfasvfavffirst-stepvfmeasurevf[MS-4]

3.vfstabilizevfimmediatelyvf[MS-5]

4.vfmustvfincludevfoutletvfprotectionvfforvfbasinsvf[MS-11]

MinimumvfStandardvf7vf-vfanswer--CutvfandvfFillvfSlopes

rougheningvfthevfsurfacevfofvfthevfslopevfdecreasesvfrunoff,vflowersvfthevfvelocityvfrunoff,vfi
ncreasesvfwatervfretention,vfandvfleadsvftovfbettervfseedvfgermination

slopesvfthatvfarevffoundvftovfbevferodingvfexcessivelyvfwithinvfonvfyearvfofvfpermanentvfstabil
izationvfshallvfbevfprovidedvfwithvfadditionalvfslopvfstabilizingvfmeasuresvfuntilvfthevfproble
mvfisvfcorrected

MinimumvfStandardvf8vf-vfanswer--ConcentratedvfRunoff

shallvfnotvfflowvfdownvfcutvforvffillvfslopesvfunlessvfcontainedvfwithinvfanvfadequatevftempora
ryvforvfpermanentvfchannel,vfflumevforvfslopevfdrainvfstructure

outletsvfofvfthesevfdrainsvfneedvfoutletvfprotectionvftovfpreventvferosionvffromvfthevfconcentr
atedvfflow

sizevfofvfpipevfdependsvfonvfdrainagevfarea

temporarilyvfconductvfconcentratedvfstormwatervfrunoffvfsafelyvfdownvfthevffacevfofvfavfcutvf
orvffillvfslopevfwithoutvfcausingvferosionvfonvforvfbelowvfthevfslope

MinimumvfStandardvf9vf-vfanswer--WatervfSeeps

whenevervfwatervfseepsvffromvfavfslopevfface,vfadequatevfdrainagevforvfothervfprotectionvfs
hallvfbevfprovided

cutvfandvffillvfoperationsvfmayvfexposevfshallowvfaquifersvforvfgroundwatervftablesvffromvfw
hichvfwatervfmayvfseepvfthroughvfthevfsidevfofvfavfslope

MinimumvfStandardvf10vf-vfanswer--InletvfProtection

allvfstormvfsewervfinletsvfthatvfarevfmadevfoperablevfduringvfconstructionvfshallvfbevfprotect
edvfsovfthatvfsediment-
ladenvfwatervfcannotvfentervfthevfconveyancevfsystemvfwithoutvffirstvfbeingvffilteredvforvfoth
erwisevftreatedvftovfremovevfsediment

stormvfsewersvfarevfdesignedvftovfefficientlyvftransportvfstormwatervfawayvffromvfthevfsite,vf
sovfwhenvfsedimentvfentersvfthevfstormvfsewervfsystem,vftwovfnegativevfeffectsvfcanvfoccur:
1.vfwhenvfvelocityvfofvfflowvfisvfhigh,vfmuchvfofvfthevfsedimentvfwillvfbevfquicklyvftransportedvft
ovfthevfnearestvfreceivingvfchannel