II Part 13.0 B - Mixing and Loading Areas for Liquid Pesticide

All mixing and loading area operations for liquid pesticides must take place on a pad that meets the following requirements:

13.5. Capacity

The mixing and loading pad shall provide at least the following capacity:

(a) The pad shall be of adequate size and design to contain 125% of the volume of the largest container to be loaded or unloaded if unprotected from precipitation or 110% of the volume of the largest container to be loaded or unloaded if protected from precipitation.

(b) If any storage container or mobile container to be loaded or unloaded has a capacity of greater than 1200 gallons the containment volume need only be large enough to hold a minimum of 1500 gallons if unprotected from precipitation or 1320 gallons if protected from precipitation. If the primary use of the pad is to load and unload spray equipment and associated support vehicles and bulk transport vehicles use the pad only for occasional delivery of pesticides then the pad size shall be determined by the volume of the largest container on the spray equipment or support vehicles provided the pad is designed so that bulk transport vehicles can conduct their occasional operations with all their appurtenances over the pad.

13.6. Pesticide discharges or precipitation accumulations on a mixing and loading area shall be immediately recovered such that the capacity listed in ¶ 13.5 is available at all times. Pesticide discharges, rinsates, or precipitation containing pesticide material recovered may be utilized for its intended purpose if it can be applied according to the label or properly disposed of according to state or federal law. The facility shall have items on hand and readily available to recover discharges to the maximum extent possible.

13.7. General Requirements

(a) Provided the required containment capacity of ¶ 13.5. is met, pads need only be large enough so that the tank and appurtenances are physically over the pad provided no flushing of the boom system occurs.

(b) Pads for mixing and loading areas shall be constructed of liquid-tight, reinforced concrete or other material so as to form an impervious barrier between the pesticide handling area and the surrounding earth.

(c) The mixing and loading pad shall be designed to prevent storm water runoff from moving onto or across the mixing and loading pad.

(d) The mixing and loading pad shall not have any outlet points.

(e) The pad shall be constructed to a permeability rate that does not exceed 1 x 10-7 centimeters per second (~0.0035 inches per day) or a citation provided that identifies a material's specification that when followed will provide an equivalent permeability.

(f) The pad must be maintained as impervious for the usable life of the structure.

(g) The pad must be able to handle the wheel loads of any vehicles using it.

(h) Mixing and loading pads shall be designed to drain liquids to a sump.

(i) Sumps shall be drained only by a manually activated pump during the operating season of the facility. Automatic pumps may be used during the inactive season.

(j) Sumps shall be constructed of materials which are watertight and resist corrosion or are treated to resist corrosion from pesticides.

Notes

II Part 13.0 B

37 CR 19, October 10,2014, effective 11/14/2014