What is the typical sequence for installing a shallow monitoring well using augering?

What is the typical sequence for installing a shallow monitoring well using augering?

• A. Drill borehole with auger, immediately grout the entire hole, then install casing and screen.
• B. Dig a trench, place the screen, and call it done.
• C. Drill borehole with auger, install casing and screen, backfill around the screen with sand, place grout to isolate the annulus, install surface seal and headworks.
• D. Install casing first, then drill a borehole with auger, then place grout, then backfill with sand, then install headworks.

Answer: (C)