SEPTIC LICENSE EXAM QUESTIONS AND
ANSWERS UPDATED (2024/2025)
(VERIFIED ANSWERS)
The appropriate minimum spacing for lateral beds is
A. 5 feet on centers
B. 8 feet side wall to side wall
C. 8 feet on centers - ANS ✓b. 8 feet side wall to side wall
The setback distance from lateral trench for wells is
A. 25 feet
B. 50 feet
C. 70 feet - ANS ✓c. 70 feet
The setback distance from lateral trench for cistern is
A. 25 feet
B. 50 feet
C. 70 feet - ANS ✓c. 70 feet
The setback distance from lateral trench for streams is
A. 25 feet
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B. 50 feet
C. 70 feet - ANS ✓a. 25 feet
The setback distance from lateral trench for lakes is
A. 25 feet
B. 50 feet
C. 70 feet - ANS ✓b. 50 feet
Back filling of system is permitted prior to final inspection providing
inspections ports are placed in lateral trenches - ANS ✓false
Soil fill added to shallow installed system must be of group three texture or
better - ANS ✓true
Certified installer not responsible for backfilling or finished grading over
system if builder does work - ANS ✓false
When fill soil is added to lateral field area the sod layer must not be
disturbed - ANS ✓false
Fill soil is tampered how far below lateral field on down slope side?
A. 5 ft
B. 10 ft
C. 15 ft
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D. 25 ft - ANS ✓c. 15 ft
Access must be provided within 24 inches of surface grade to outlet end
man hole of septic tank - ANS ✓false
Distribution boxes shall be installed level with all connections rendered
watertight - ANS ✓true
Grease taps required for all establishments that manufacture or prepare
food - ANS ✓true
Under gravity flow uses SDR35, schedule 40, and 1500 pound crush PVC
pipe is approved for use between distribution box + lateral trenches or
beds - ANS ✓false
Pipe connections between distribution box + lateral trenches do not need
to be watertight - ANS ✓false
Equal flow type distribution boxes shall be placed on stable base - ANS
✓true
If certified installer intentionally misrepresents the number of bedrooms
on application for site evaluation. What actions can local inspector take?
A. Suspend installer certification
B. Revoke installer certification
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