Washing out concrete trucks and tools creates water that should not reach storm drains or soil. A planned washout area keeps the site compliant and the inspector happy.
In this article
Why it matters
Washout water is highly alkaline. Stormwater permits and local rules usually require it to be contained.
Washout options
Prefabricated containers, lined pits or roll-off washout bins. Choose based on site size and pour schedule.
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Location
Away from storm drains, ditches and slopes, and easy for trucks to reach.
Signage
Clear signs tell drivers where to wash out. Without them, they use the nearest gutter.
Capacity
Size the washout for the pours ahead and check it before every pour.
Disposal
Let water evaporate or remove it as allowed, and dispose of hardened concrete properly.
Inspections
Include the washout in stormwater inspections and fix leaks right away.
Common mistakes
No signs, overflowing containers and washouts placed next to inlets.
Brief the drivers
Tell suppliers about the washout location before the first pour, and repeat it in the pour plan.
Document it
Photos of the washout during inspections show compliance if questions come up later.
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Frequently asked questions
Can washout water go into a storm drain?
Generally no. Many stormwater permits and local rules prohibit it. Use a designated washout and follow your permit and local requirements for disposal.