(1) Operational activities must meet the following standards:
(a) if operational activities are conducted within secondary containment, the containment shall comply with ARM 4.10.1105 and must withstand the weight of any vehicles and storage containers used within the secondary containment.
(b) a person conducting operational activities outside of secondary containment must conduct these activities on a containment pad.
(c) the containment pad must have a capacity of at least 750 gallons. If the largest container to be used on the containment pad is less than 750 gallons, the capacity of containment pad must be 100 percent of the largest pesticide container or pesticide holding equipment used on the pad.
(d) the surface area of the containment pad must extend completely beneath any container used on the pad. For transport vehicles, excluding railcars, the surface area of the pad must extend beyond any valve or hose coupling used in the transfer of pesticide materials.
(e) the containment pad must be constructed in a manner that permits removal and recovery of spilled, leaked, or discharged materials and rainfall. The surface of the pad must be sloped toward an area where liquids can be collected for removal.
(f) the containment pad must be constructed of materials and with specification as required for secondary containment in ARM 4.10.1105.
(g) temporary or portable catch basins must be used under fittings or connections not located over a containment pad during pesticide transfers. An attendant must be present during all operational activities.