Containment prevents contamination of water supplies and lake water from undetected leaks.
Dispose of paint thinners and other chemical products responsibly not on the ground or down the drain. These products cannot be removed by natural processes. This will help prevent toxic waste leaking into a landfill. Allow used paint thinner and solvents to settle, then pour off the clear liquid and reuse. The sludge should be air-dried and put in the garbage.