Administrative Rules of Montana
Department 4 - AGRICULTURE
Chapter 4.10 - AGRICULTURAL SCIENCES DIVISION
Subchapter 4.10.11 - Pesticide Reporting, Cleanup, and Containment
Rule 4.10.1105 - SECONDARY CONTAINMENT AT PERMANENT STORAGE FACILITIES
Universal Citation: MT Admin Rules 4.10.1105
Current through Register Vol. 6, March 22, 2024
(1) Any individual primary containment capable of storing more than 500 U.S. gallons or 4,500 pounds and in-service for more than 14 consecutive days and its associated appurtenances must be placed within secondary containment that meets the following requirements:
(a) secondary containment not protected from
precipitation shall contain at least 125% of the volume of the largest primary
containment within the secondary containment plus the displacement of all other
primary containment, appurtenances, and other items which cause displacement
within the secondary containment.
(b) secondary containment located indoors or
under a roof to prevent accumulation of precipitation shall contain at least
110% of the volume of the largest primary containment plus the displacement of
all other primary containment, appurtenances, and other items which cause
displacement within the secondary containment.
(c) the walls and floors of secondary
containment shall be constructed of steel, poured reinforced concrete, precast
concrete modules, solid masonry, synthetic liners, or other materials that will
provide secondary containment. Floors and walls constructed of clay, natural
soil, natural soil clay mixtures or clay bentonite mixtures are prohibited.
Materials used in the secondary containment shall be chemically compatible with
the pesticides being stored. A written conformation of compatibility from the
manufacturer and kept on file at the PSF or at the nearest office from which
the PSF is administered is recommended.
(d) walls shall withstand a full hydrostatic
head of any spill, and shall be sealed to prevent leakage.
(e) piping through the outside walls of a
secondary containment is prohibited.
(f) the secondary containment floor shall
slope to a liquid tight collection point or sump that allows spilled or
deposited material to be easily removed. Any pump used for recovering materials
from the secondary containment shall be manually activated.
(g) synthetic liners shall be installed under
the supervision of a qualified representative of the manufacturer, a contractor
certified by the manufacturer, or a certified engineer. All seams shall be
tested and repaired, if necessary, in accordance with the manufacturer's
recommendation. A record regarding installation date, life expectancy and
chemical compatibility must be kept.
(h) a prefabricated secondary containment
shall be composed of a rigid prefabricated basin having a base and walls
constructed of steel or synthetic materials which are resistant to corrosion,
puncture and cracking.
(i) the
prefabricated secondary containment shall withstand all foreseeable loading
conditions, including the primary containment load and a full hydrostatic head
of any spill. Multiple basins shall be connected in a manner which assures an
adequate transfer of discharge between basins.
(j) discharge outlets, valves or gravity
drains shall comply with ARM
4.10.1103(5).
(k) secondary containment for pesticides must
be separate from containment for fertilizer, but they may have a common wall or
partition.
Sec. 80-8-105, MCA; IMP, Sec. 80-8-105, MCA;
Disclaimer: These regulations may not be the most recent version. Montana may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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