SEPTIC LICENSE 109 FINAL PAPER 2026
QUESTIONS WITH ANSWERS GRADED A+
◍ What must happen before covering all or any of the sewage disposal
system - Must be inspected and approved
◍ What has to happen with roof and surface water - Must be directed
away or downslope from sewage disposal system by footing or
foundation floor drains or surface diversion ditches
◍ What must be done to all pipe joints including those in the drain field
- Glued and watertight
◍ How much fall should there be on all parts of the building sewer - 1/8
inch per foot
◍ Elbows or bends should be no greater than ____ - 45 degrees, 90
degree sweeps may be used
◍ What is the rating needed for solid pipe under driving,parking, or any
vehicle encroaching areas - ASTM- 3034 crush rating, or enclosed in a
pipe that does meet it
, ◍ Who is the doe - Department of ecology
◍ What department criteria do you follow for sewage that crosses over
waterline - Department of Ecology (DOE)
◍ All On-site septic systems should be watertight except for the ______
- Dispersal component
◍ Septic tanks should be _____. And on what kind of soil - Level, and
on undisturbed soil, or by manufacture standards if other than concrete
tank
◍ If grade is dug to deep what should happen - Sand should be added
for proper bedding back to correct grade
◍ All connections at tank should be _________ - Watertight
◍ Tanks should be accessible at grade unless ___ - A Marker is placed at
grade
◍ How far down should the top of the tank be from finished grade - 6
inches
QUESTIONS WITH ANSWERS GRADED A+
◍ What must happen before covering all or any of the sewage disposal
system - Must be inspected and approved
◍ What has to happen with roof and surface water - Must be directed
away or downslope from sewage disposal system by footing or
foundation floor drains or surface diversion ditches
◍ What must be done to all pipe joints including those in the drain field
- Glued and watertight
◍ How much fall should there be on all parts of the building sewer - 1/8
inch per foot
◍ Elbows or bends should be no greater than ____ - 45 degrees, 90
degree sweeps may be used
◍ What is the rating needed for solid pipe under driving,parking, or any
vehicle encroaching areas - ASTM- 3034 crush rating, or enclosed in a
pipe that does meet it
, ◍ Who is the doe - Department of ecology
◍ What department criteria do you follow for sewage that crosses over
waterline - Department of Ecology (DOE)
◍ All On-site septic systems should be watertight except for the ______
- Dispersal component
◍ Septic tanks should be _____. And on what kind of soil - Level, and
on undisturbed soil, or by manufacture standards if other than concrete
tank
◍ If grade is dug to deep what should happen - Sand should be added
for proper bedding back to correct grade
◍ All connections at tank should be _________ - Watertight
◍ Tanks should be accessible at grade unless ___ - A Marker is placed at
grade
◍ How far down should the top of the tank be from finished grade - 6
inches
