SWM DEQ (ACTUAL 2025/2026) EXAM QUESTIONS WITH
VERIFIED CORRECT ANSWERS GRADED A+
Difference between level 1 and level 2 permeable pavement -
-
--Answers----for level 1, UD is required
How many design scales are there fore infiltration practices?
-
---Answers --- 3
For check dams in dry swale, what is the max check
dam height? - ---Answers 12"
What is the filter layer in the dry swale? - ---Answers----3"
of pea gravel
Difference in swale slopes for wet swale level 1 and level 2 -
-
--Answers----level 1 swale slopes less than 2%, level 2
swale slopes less than 1%
Difference between level 1 and level 2 filtering practices - -
-- Answers----level 1 is a one cell design and level 2 is a
two cell design
If an E&SC practice is going to be converted to a permanent
Page 1 of 20
,BMP, how should the elevations compare? - ---Answers----
BMP elevation should be lower
Page 2 of 20
, How long does it generally take to fully establish a vegetated
roof? - ---Answers----12 to 18 months
Erosion and sediment control measures should be used
when the soil compost amended area is what size? - ---
Answers---
-2,500 ft^2 or more
For an earthen embankment, trees must be planted how
far beyond the embankment? - ---Answers 25'
Can vegetated emergency spillways be built into fill? - -
-- Answers----No, has to be armored if built into fill
What percent of the constructed wetland surface must be
high marsh? - ---Answers 70%
For a wet pond, the bottom of the inlet pipe should be -
--- Answers----even with the permanent pool's water
level
For a wet pond, the max slope of the safety bench is -
--- Answers 5%
If you are converting an E&SC practice to a permanent wet
pond BMP, when should you install the permanent riser? - -
-- Answers----During construction
Page 3 of 20
VERIFIED CORRECT ANSWERS GRADED A+
Difference between level 1 and level 2 permeable pavement -
-
--Answers----for level 1, UD is required
How many design scales are there fore infiltration practices?
-
---Answers --- 3
For check dams in dry swale, what is the max check
dam height? - ---Answers 12"
What is the filter layer in the dry swale? - ---Answers----3"
of pea gravel
Difference in swale slopes for wet swale level 1 and level 2 -
-
--Answers----level 1 swale slopes less than 2%, level 2
swale slopes less than 1%
Difference between level 1 and level 2 filtering practices - -
-- Answers----level 1 is a one cell design and level 2 is a
two cell design
If an E&SC practice is going to be converted to a permanent
Page 1 of 20
,BMP, how should the elevations compare? - ---Answers----
BMP elevation should be lower
Page 2 of 20
, How long does it generally take to fully establish a vegetated
roof? - ---Answers----12 to 18 months
Erosion and sediment control measures should be used
when the soil compost amended area is what size? - ---
Answers---
-2,500 ft^2 or more
For an earthen embankment, trees must be planted how
far beyond the embankment? - ---Answers 25'
Can vegetated emergency spillways be built into fill? - -
-- Answers----No, has to be armored if built into fill
What percent of the constructed wetland surface must be
high marsh? - ---Answers 70%
For a wet pond, the bottom of the inlet pipe should be -
--- Answers----even with the permanent pool's water
level
For a wet pond, the max slope of the safety bench is -
--- Answers 5%
If you are converting an E&SC practice to a permanent wet
pond BMP, when should you install the permanent riser? - -
-- Answers----During construction
Page 3 of 20
