Collection System
What is infiltration?
Water entering crack in pipe or joints.
What is a wet well?
Pump is submerged.
How far away from the trench should your spoils pile be?
2ft
What is the invert?
Bottom of the pipe where water flows.
What is inflow?
Water entering manhole lids.
Where must man holes be located?
Every change in direction or elevation
Why are lift stations used in gravity collection system?
Pump wastewater to a higher elevation.
What is the definition of a confined space?
Area not designed for continuous human occupancy.
What can be identified using dye test?
Illegal connections.
What is the crown of the pipe?
Top
What is grit?
Heavy material such as sand, coffee grounds, gravel, eggshells.
What is cavitation?
Air in a pump.
Oxygen in a concentration above _____% can be combustable?
23.5%
What is annaerobic?
No oxygen.
What is exfiltration?
Leakage of wastewater out of the collection system.
What are 3 types of pipe material?
CI
Concrete
VCP
Orangeburge
AC
What is a lead and lag pump?
Lead pump is is primary, lag will turn on if lead cannot keep up.
What gas smells like rotten eggs?
H2S / Hydrogen Sulfide
What is a drop manhole?
Incoming sewer is significantly higher than the out going pipe.
What is aerobic?
Oxygen
What does hydrogen sulfide do to infrastructure ?
Corrosion.
How does an air bubbler system measure wastewater depth?
Pressure it takes to push air out of the injector.
Name for chlorine is solid, liquid, and gas state.
Sodium Hypochlorite - Liquid
Calcium Hypochlorite - Granular
Cl2 - Gas
What does SCADA stand for?
Supervisory Control And Data Acquisition
What chemical is added to control hydrogen sulfide?
Chlorine / Hydrogen Peroxide