The component parts of a well include all of the following except:

• A. Blow Off
• B. Sanitary Seal
• C. Well Screen
• D. Cement Grout

Answer: (A)

In a properly constructed well, the items that are permanently part of the system are the sanitary seal, the well screen, and the cement grout. The sanitary seal creates a barrier at the surface area around the casing to prevent surface water and contaminants from seeping down into the well. The well screen is the intake portion that allows water to enter while keeping sediments from clogging the well. Cement grout fills the space around the casing to seal the annulus, isolate different groundwater layers, and stabilize the structure.

A blow off is not a permanent component of the finished well; it’s typically a temporary outlet used during construction, testing, or flushing to vent air or water. Because it’s not a fixed part of the well’s final structure, it doesn’t belong as a permanent component.