Page |1
SWM DEQ 2025 WITH 100% VERIFIED
QUESTIONS AND EXPERT
SOLUTIONS| GUARANTEED VALUE
AND SUCCESS.
1. A simple rooftop disconnect is not advisable for residential lots less than
- correct answer - 6,000 ft^2
2. Max impervious rooftop area treated; 1,000 ft^2 per simple
disconnection and longest flow path is - correct answer - 75 ft
3. Dimensions of a soil compost amended filter - correct answer - 20 ft long
and 10 feet wide
4. Typical depth for rain gardens and micro-bioretention - correct answer -
6 to 12" deep
5. Sheet flow to vegetated filter strip/conserved open space. A gravel
diaphragm is not needed if - correct answer - entire contributing
drainage area is turf
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6. Sheet flow to vegetated filter strip/conserved open space. Gravel
diaphragm dimensions - correct answer - 3" drop, 2' wide and 1' deep
7. Sheet flow to vegetated filter strip/conserved open space. Level
spreader forebay max - correct answer - 3' deep then transition to 1' @
level spreader lip
8. What is a level spreader lip made out of? - correct answer - concrete,
wood, or pre-fabricated metal (non-erodible material)
9. Grass channel side slopes and longitudinal slope - correct answer -
3H:1V or flatter, max longitudinal slope 4%
10. Max contributing drainage area for grass channel - correct answer - 5
acres
11. Pre-treatment check dams in grass channels - correct answer - max
desired height 12-18"
12. Soil compost amendment. 1st soil tested conducted every - correct
answer - 5000 ft^2 to determine soil properties
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13. Soil compost amendment. 2nd test taken - correct answer - At least 1
week after compost has been incorporated
14. For soil compost amendment prep you must deep till 2-3' with rips -
correct answer - perpendicular to direction of flow
15. Difference between extensive and intensive for vegetated roof -
correct answer - extensive: low plants with 3" to 6" growth medium,
intensive medium 6 to 12"
16. The vegetated roof leakproof tests involves putting 2" of water over
membrane for - correct answer - 48 hours
17. Warranty related to vegetative roof suggests - correct answer - 75%
survival after first growing season
18. Minimum effective vegetated ground cover for flat roofs and for
pitched roofs - correct answer - 75%, 90%
19. Difference between level 1 and level 2 permeable pavement - correct
answer - for level 1, UD is required
SWM DEQ 2025 WITH 100% VERIFIED
QUESTIONS AND EXPERT
SOLUTIONS| GUARANTEED VALUE
AND SUCCESS.
1. A simple rooftop disconnect is not advisable for residential lots less than
- correct answer - 6,000 ft^2
2. Max impervious rooftop area treated; 1,000 ft^2 per simple
disconnection and longest flow path is - correct answer - 75 ft
3. Dimensions of a soil compost amended filter - correct answer - 20 ft long
and 10 feet wide
4. Typical depth for rain gardens and micro-bioretention - correct answer -
6 to 12" deep
5. Sheet flow to vegetated filter strip/conserved open space. A gravel
diaphragm is not needed if - correct answer - entire contributing
drainage area is turf
, Page |2
6. Sheet flow to vegetated filter strip/conserved open space. Gravel
diaphragm dimensions - correct answer - 3" drop, 2' wide and 1' deep
7. Sheet flow to vegetated filter strip/conserved open space. Level
spreader forebay max - correct answer - 3' deep then transition to 1' @
level spreader lip
8. What is a level spreader lip made out of? - correct answer - concrete,
wood, or pre-fabricated metal (non-erodible material)
9. Grass channel side slopes and longitudinal slope - correct answer -
3H:1V or flatter, max longitudinal slope 4%
10. Max contributing drainage area for grass channel - correct answer - 5
acres
11. Pre-treatment check dams in grass channels - correct answer - max
desired height 12-18"
12. Soil compost amendment. 1st soil tested conducted every - correct
answer - 5000 ft^2 to determine soil properties
, Page |3
13. Soil compost amendment. 2nd test taken - correct answer - At least 1
week after compost has been incorporated
14. For soil compost amendment prep you must deep till 2-3' with rips -
correct answer - perpendicular to direction of flow
15. Difference between extensive and intensive for vegetated roof -
correct answer - extensive: low plants with 3" to 6" growth medium,
intensive medium 6 to 12"
16. The vegetated roof leakproof tests involves putting 2" of water over
membrane for - correct answer - 48 hours
17. Warranty related to vegetative roof suggests - correct answer - 75%
survival after first growing season
18. Minimum effective vegetated ground cover for flat roofs and for
pitched roofs - correct answer - 75%, 90%
19. Difference between level 1 and level 2 permeable pavement - correct
answer - for level 1, UD is required
