Current through December 12, 2024
1. For the purposes of NAC
445A.22725,
445A.2273 and 445A.2274, the
action level for groundwater must be established at the following levels:
(a) The presence of 1/2 inch or more of a
petroleum substance that is free-floating on the surface of the water of an
aquifer, using a measurement accuracy of .01 feet.
(b) The presence of a hazardous substance,
hazardous waste or a regulated substance in groundwater at a level of
concentration equal to the maximum contaminant level for that substance or
waste established pursuant to the Safe Drinking Water Act,
42 U.S.C.
§§
300 f et seq., and 40 C.F.R.
Part 141, as those sections existed on October 3, 1996.
(c) A level of concentration equal to the
background concentration of a hazardous substance, hazardous waste or a
regulated substance, if that level of concentration is greater than the maximum
contaminant level established pursuant to paragraph (b).
(d) If a maximum contaminant level has not
been established for a hazardous substance, hazardous waste or a regulated
substance, a level of concentration equal to:
(1) The background concentration of the waste
or substance; or
(2) An appropriate
level of concentration that is based on the protection of public health and
safety and the environment. The appropriate level of concentration must be
determined by the Division using the Integrated Risk Information System,
adopted by reference in NAC
445A.2272, or an equivalent
method approved by the Division.
2. In establishing an action level pursuant
to subsection 1, the Division may consider:
(a) The presence of more than one hazardous
substance, hazardous waste or regulated substance in the groundwater;
(b) Any potential threat the contamination
may pose to sensitive areas of the environment; and
(c) Any other threat or potential threat to
groundwater that is specifically related to the site.
3. If more than one action level for
groundwater may be established using the criteria set forth in subsection 1,
the most restrictive action level must be used.
4. The Safe Drinking Water Act,
42 U.S.C.
§§
300 f et seq., and 40 C.F.R.
Part 141, as those sections existed on October 3, 1996, are hereby adopted by
reference. A copy of those sections may be obtained by mail from the
Superintendent of Documents, U.S. Government Printing Office, P.O. Box 979050,
St. Louis, Missouri 63197-9000, or by toll-free telephone at (866) 512-1800, at
a cost of $30.
Added to NAC by
Environmental Comm'n, eff. 10-3-96
NRS 445A.425
