(1) Formulated bulk pesticides in undivided quantities of more than 500 U.S.
gallons or 4,500 pounds, stored for more than 14 consecutive days, shall be in
primary containment meeting the following requirements:
(a) primary containment and appurtenances shall be constructed, installed
and maintained to prevent a spill of pesticide.
(b) primary containment and appurtenances shall be of materials which are
resistant to corrosion, puncture and cracking.
(c) materials used in the construction or repair
of primary containment and appurtenances may not be of a type which react
chemically or electrolytically with stored pesticides in a way which may weaken
the storage container or appurtenances, or create a risk of discharge.
(d) materials used for valves, fittings and
repairs shall be compatible with the materials used in the primary containment.
(e) primary containment and appurtenances shall
handle all operation stresses, taking into account static head, pressure
buildup from pumps and compressors, and any other mechanical stresses to which
the primary containment and appurtenances may be subject in the foreseeable
course of operations.
(f) every primary containment connection, except
a safety relief valve and conservation vent connection, shall be equipped with
a manual shut-off valve.
(g) appurtenances shall be adequately supported
to prevent sagging and possible breakage because of gravity and other forces encountered
in the ordinary course of operation.
(h) primary containment and appurtenances shall
be protected against reasonably foreseeable risks of damage by moving vehicles
(i) primary containment, not in-service
for longer than two years shall be thoroughly cleaned with all hatches secured
and all valves or connections secured. Vents shall be functional. An integrity
test shall be performed before primary containment can be placed back in
(j) primary containment shall be anchored or
secured or elevated to prevent instability or flotation as a result of liquid
accumulations within the secondary containment.
(k) primary containment may not be filled beyond
the capacity for which it is designed, taking into account the density of the
liquid being stored and thermal expansion during storage.
(l) primary containment retaining liquid shall
be equipped with a liquid level gauging device by which the level of liquid in
the storage container can be readily and safely determined. A gauging device is
not required if the liquid in the container can be measured safely by other
means. The gauging device shall be secured to protect against breakage or
vandalism which may result in a discharge. External sight gauges must be
equipped with an automatic shut-off valve.
(m) primary containment used for liquid
pesticide shall be equipped with a conservation vent which opens and closes
within the designed pressure limits of the container.
(n) All primary containment shall be labeled in
accordance with the labeling requirements set forth in the Code of Federal
Regulations Title 40, parts 152 and 156 (July 1, 1996) , which are hereby
incorporated by reference. Copies of 40 CFR, parts 152 and 156 are available
upon request to the Montana Department of Agriculture, P.O. Box 200201, Helena,
MT 59620-0201. The registered product label shall be attached to primary
containment in a prominent location. The label shall be complete and legible.