Virginia Administrative Code
Title 2 - AGRICULTURE
Agency 5 - DEPARTMENT OF AGRICULTURE AND CONSUMER SERVICES
Chapter 670 - REGULATIONS GOVERNING PESTICIDE PRODUCT REGISTRATION, HANDLING, STORAGE, AND DISPOSAL UNDER AUTHORITY OF THE VIRGINIA PESTICIDE CONTROL ACT
Section 2VAC5-670-170 - Application and equipment

A. No person shall apply, dispense, or use any pesticide in or through any equipment or application apparatus unless the equipment or apparatus is in sound mechanical condition and capable of satisfactory operation. All pesticide application equipment shall be properly equipped to dispense the proper amount of material. All pesticide mixing, storage, or holding tanks, whether on application equipment or not, shall be leakproof. All spray distribution systems shall be leakproof, and any pumps which these systems may have shall be capable of operating at sufficient pressure to assure a uniform and adequate rate of discharge.

B. All pesticide application equipment shall be equipped with cut-off valves and discharge orifices to enable the operator to pass over nontarget areas without contaminating them. All hoses, pumps, or other equipment used to fill pesticide handling, storage, or application equipment shall be fitted with an effective valve or device to prevent backflow into water supply systems, streams, lakes, other sources of water, or other materials. However, these backflow devices or valves are not required for separate water storage tanks used to fill agricultural pesticide application equipment by gravity systems when the fill spout, tube, or pipe is not allowed to contact or fall below the water level of the application equipment being filled, and no other possible means of establishing a backsiphon or backflow exists.