Enprob has served Northern and Central California since 1994 in direct push site assessments, assisting clients with soil, groundwater, and gas sampling, temporary monitoring well installation, ORC® and HRC® injection, and a wide variety of other assessment and remediation tasks.


Based in Oroville and Santa Cruz, California, we operate over a thousand projects throughout Northern California and Nevada. Enprob is a fully-licensed and insured C-57 Drilling Contractor, California License #777007. Our crew are 40-hour OSHA certified and are highly trained. We operate a variety of Geoprobe® equipment including the Geoprobe 5400, 5410, 6600, and 540MT (Limited Access). 500 gallon injection trailers, Double Diaphram pump. HRC hot tank trailer, including DP-800, GS-1000 & GS-2000, pumping capabilities up to 80 Gallons per minute.

Enprob uses Geoprobe Systems ® direct push technology. Direct push involves the use of small (1.25" to 1.5") steel probes that are hydraulically pushed or hammered into the underlying soil formation to a specific depth. At this depth, the operator may extract a soil core or a groundwater or gas sample.