Dikes, collecting pools and washing slabs with sumps are effective drainage systems. All collected water from runoff should be treated as a surplus pesticide and disposed of as such. The storage area should be heated, dry, well-ventilated, and the pesticides should be kept out of direct sunlight and away from steam pipes. Cold temperatures may crystallize liquid pesticides, and hot temperatures may cause pesticides to separate or deteriorate. As a general guideline, keep the storage area above 40 F and below 95 F. Many growers have found that a light bulb left on will adequately heat small spaces.
Damp areas cause metal or paper containers to deteriorate.
If the humid ty is high, wettable powders and granular formulations of pesticides can cake or lump into useless blocks. If dampness is a problem, a dehumidifier may be a reasonable solution. All containers must have a legible and visible EPA registered label attached. These labels are often susceptible to dampness, and either deteriorate or loosen and drop off the container when stored in damp areas. It is often helpful to protect the original labels by covering them with transparent wrapping tape.