When can a septic tank system be used effectively? (More than one response
may be correct.)
a. Adequate space is available.
b. The soil has adequate absorptive properties.
c. The ground water table is at least 50 feet below the surface.
In conducting a percolation test, you should determine the percolation rate _____
hours after water is first added to the hole
16. If a percolation test hole has water standing in it after the overnight swelling period,
the percolation rate is determined from the drop in water level that occurs during:
The first hour.
The first 30 minutes.
The final 30 minutes of a 4-hour time span.
An average 30-minute period over a 4-hour time span.