When working with plumbness–
alignment specifications, a well drilling
contractor should place emphasis on
drilling as straight a borehole as possi-
ble—because that's when something
can be done about plumbness and
alignment. It's too late when the well
is complete.
Twitter @WaterWellJournl
WWJ March 2015 23
Figure 4. A gyroscopic deviation survey tool's view of deviation from plumb of a well in
vertical north-south section.
DACUM Codes
To help meet your professional needs,
this article covers skills and competencies
found in DACUM charts for drillers and
pump installers. DO refers to the drilling
chart. The letter and number immediately
following is the skill on the chart covered
by the article. This article covers:
DOB-3, DOD-1, DOD-6, DOE-3,
DOE-14, DOL-11
More information on DACUM and the
charts are available at
www.NGWA.org.
WWJ
Gary L. Hix, RG, CWD/PI,
is a registered professional
geologist in Arizona, a Certified
Well Driller/Pump Installer
by the National Ground Water
Association, and a Certified
Professional Geologist by the
American Institute of Professional Geologists.
He has authored many articles on subjects
related to well drilling issues for Water Well
Journal. He can be reached at gary.hix@cox.net.
