One of the most important precautions you must take when mixing
pesticides is to prevent the pesticides from being back-siphoned
from the sprayer tank into the well and, subsequently, the ground
water. Therefore, the first step is to keep the end of the fill
hose well above the water level in the spray tank.
Secondly, use an anti-backflow device on the fill hose. These devices are inexpensive and can be purchased from irrigation or sprayer equipment suppliers. Furthermore, anti-backflow devices are required by law in many states.
Ground water contamination can result even from small spills in the mixing and loading area. Small quantities spilled regularly in the same place can go unnoticed, but the pesticides can build up in the soil and eventually reach the ground water. By mixing and loading on an impermeable surface, such as concrete, you can contain and reuse most spilled pesticides.
The two best ways to improve pesticide mixing and loading are to build a mixing and loading pad or to better manage your existing mixing and loading site.
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