DEQ ESC Specifications UPDATED
ACTUAL Exam Questions and CORRECT
Answers
What is the minimum height for plastic and metal SAF? - CORRECT ANSWER - 5, 6
What kind of stone is used for a construction entrance? - CORRECT ANSWER - VDOT
#1
For Construction Road Stabilization, what is the minimum width for one-way and two-way
traffic? - CORRECT ANSWER - 14, 20
What is the type of stone and depth required for construction road stabilization? - CORRECT
ANSWER - 6" of VDOT #1 coarse aggregate
Straw bales decrease the velocity of - CORRECT ANSWER - sheet flow
Straw bales should not be used for - CORRECT ANSWER - ditches or swales
How many stakes per bale? - CORRECT ANSWER -2
Silt fence should be placed __ to __ feet beyond the base of a slope __% or greater - CORRECT
ANSWER - 5, 7, 5
Max distance between stakes when silt fence does not have wire and when it does have wire -
CORRECT ANSWER - 6, 10
Height range for silt fence - CORRECT ANSWER - 16" to 34"
, Where joints overlap in silt fence, a minimum of __of fabric shall be wrapped around the stake
from each side - CORRECT ANSWER - 6"
How much fabric should be in a silt fence trench? - CORRECT ANSWER - 8" (4"*4"
trench)
Max drainage area for the storm drain inlet protection - CORRECT ANSWER - 1 acre
For silt fence drop inlet protection, - CORRECT ANSWER - use 2"*4" stakes, space 3'
apart and entrench fabric 12 "
For gravel and wire mesh drop inlet - CORRECT ANSWER - 1/2" wire mesh over inlet,
minimum 1' beyond each side of inlet, depth of stone to be 12" and extend 18" on all sides
Block and gravel inlets - CORRECT ANSWER - 4", 8", or 12" blocks placed on sides,
minimum 12" high, maximum 24" high, 1/2" wire mesh between concrete blocks and #3, #357,
#5 stone
Gravel curb inlet protection - CORRECT ANSWER - 1/2" wire mesh (extend 12" over top
and 12" in gutter pan), pile stone against wire to cover inlet opening
Wooden weir curb inlet protection - CORRECT ANSWER - attach wire mesh to 2"*4"
wooden weir (30" deep, inlet opening plus 4'), Use 2"*4" anchors, place 2"*4" across inlet and
nail together
Block and gravel curb inlet protection - CORRECT ANSWER - 2 concrete blocks placed
on sides against the curb at either side of the inlet opening, 2"*4" placed flat through outer holes
of each spacer block to keep front blocks
Silt Fence culvert inlet protection has an expected life span of - CORRECT ANSWER -3
months
ACTUAL Exam Questions and CORRECT
Answers
What is the minimum height for plastic and metal SAF? - CORRECT ANSWER - 5, 6
What kind of stone is used for a construction entrance? - CORRECT ANSWER - VDOT
#1
For Construction Road Stabilization, what is the minimum width for one-way and two-way
traffic? - CORRECT ANSWER - 14, 20
What is the type of stone and depth required for construction road stabilization? - CORRECT
ANSWER - 6" of VDOT #1 coarse aggregate
Straw bales decrease the velocity of - CORRECT ANSWER - sheet flow
Straw bales should not be used for - CORRECT ANSWER - ditches or swales
How many stakes per bale? - CORRECT ANSWER -2
Silt fence should be placed __ to __ feet beyond the base of a slope __% or greater - CORRECT
ANSWER - 5, 7, 5
Max distance between stakes when silt fence does not have wire and when it does have wire -
CORRECT ANSWER - 6, 10
Height range for silt fence - CORRECT ANSWER - 16" to 34"
, Where joints overlap in silt fence, a minimum of __of fabric shall be wrapped around the stake
from each side - CORRECT ANSWER - 6"
How much fabric should be in a silt fence trench? - CORRECT ANSWER - 8" (4"*4"
trench)
Max drainage area for the storm drain inlet protection - CORRECT ANSWER - 1 acre
For silt fence drop inlet protection, - CORRECT ANSWER - use 2"*4" stakes, space 3'
apart and entrench fabric 12 "
For gravel and wire mesh drop inlet - CORRECT ANSWER - 1/2" wire mesh over inlet,
minimum 1' beyond each side of inlet, depth of stone to be 12" and extend 18" on all sides
Block and gravel inlets - CORRECT ANSWER - 4", 8", or 12" blocks placed on sides,
minimum 12" high, maximum 24" high, 1/2" wire mesh between concrete blocks and #3, #357,
#5 stone
Gravel curb inlet protection - CORRECT ANSWER - 1/2" wire mesh (extend 12" over top
and 12" in gutter pan), pile stone against wire to cover inlet opening
Wooden weir curb inlet protection - CORRECT ANSWER - attach wire mesh to 2"*4"
wooden weir (30" deep, inlet opening plus 4'), Use 2"*4" anchors, place 2"*4" across inlet and
nail together
Block and gravel curb inlet protection - CORRECT ANSWER - 2 concrete blocks placed
on sides against the curb at either side of the inlet opening, 2"*4" placed flat through outer holes
of each spacer block to keep front blocks
Silt Fence culvert inlet protection has an expected life span of - CORRECT ANSWER -3
months
