A well driller shall install casing in a
monitoring well. If polyvinyl chloride casing is used, it must comply with the
standards adopted by reference pursuant to subsection 1 of NAC
2. The well driller shall take the
precautions necessary to prevent contamination of groundwater. The equipment
used to construct a monitoring well must be decontaminated before the
construction of the well is commenced.
3. The diameter of the casing must not exceed
4 inches in nominal size.
connections of the casing must comply with the provisions of NAC
The connections must be made watertight by:
(a) Wrapping them with teflon tape;
(b) Placing a ring or gasket between them;
(c) By any other method which
will not introduce contaminants into the well except gluing.
5. Both ends of the casing must be
6. The perforations must be
of a width and length which will allow the strata to be observed while not
permitting the infiltration of the gravel pack through the casing or allowing
the contaminants or water from separate strata to commingle.
7. To ensure adequate space for the gravel
pack and seals, the borehole of a monitoring well must, for the entire length
of the casing placed in the well, be not less than 4 inches larger than the
diameter of the casing.
8. Not more
than one perforated or screened section of casing may be placed in the borehole
of a monitoring well.
9. Not more
than one casing may be placed in the borehole of a monitoring well unless the
vertical intervals of the borehole in between the screened sections of the
casings are sealed with neat cement, cement grout or cement-bentonite
10. Monitoring wells must be
drilled an adequate distance from each other to ensure that there is no
commingling of the contaminants or groundwater encountered in the
Nev. Admin. Code §
Added to NAC
by St. Engineer, eff. 12-30-97; A by R039-12, 6-29-2012; A by
eff. 10/24/2014; A by
eff. 12/29/2020; A