Water wells require geophysical logging to verify aquifer characteristics, screened intervals and casing bond integrity.  Many federal, state and local agencies now require drilling contractors to log their wells. Drillers can now perform logging on their own with a new generation of portable equipment that operates from their PC. It allows them to output logs on site, in real time, so they can make informed decisions with confidence. Mount Sopris Instruments can be reached at 303-279-3211. www.mountsopris.com