The job is not environmentally complete when the concrete reaches the forms. Washing chutes, tools, and equipment creates slurry that needs a designated containment and disposal arrangement. A storm drain is not a convenient waste route, and a patch of bare ground is not automatically an approved washout area. Plan the location and capacity before the first truck needs cleaning so the driver does not improvise beside the curb.
Use the controls
Direct washout to the approved leak-resistant arrangement under the site plan. Keep it accessible for intended equipment and away from conflicts that could cause spills or vehicle strikes. Inspect condition and remaining capacity using the project procedure. Do not use a damaged container, overfill it, or allow rainwater and new loads to exceed its intended management. Workers also need protection from splash, wet cement contact, and slippery surfaces around the station.
Work within the safe plan
If washout escapes, stop the source when safe, protect people, and notify the responsible site personnel promptly. Use the approved spill and stormwater response instead of pushing the material into the nearest inlet or guessing at a neutralizing chemical. Manage collected solids and water through the designated recycling or disposal process. Before leaving, check the route for tracked slurry and verify that the washout remains controlled for the next delivery. Clean equipment should not create contaminated runoff.
Discuss with the crew
The washout container is full and a driver begins rinsing into a nearby street inlet.
Question: What should happen?
Answer guidance: Stop the discharge when safe and notify site personnel for approved containment and response.
Question: Can washout be directed to bare soil by default?
Answer guidance: No. Use the site’s approved containment and management arrangement.
Prepare, act, and follow up
Leader preparation: Bring the washout location map and inspection instructions.
Put it into practice: Locate the washout and nearest drainage routes on the map.
Supervisor follow-up: Inspect capacity before deliveries and arrange timely removal or recycling.
Official reference: EPA: Stormwater Best Management Practices—Concrete Washout
https://www.epa.gov/sites/default/files/2020-02/documents/concretewashout.pdf
Awareness briefing. Apply current site procedures and applicable requirements. This talk does not replace required qualification, practical training, exposure assessment, medical evaluation, or a written program.
Suggested session: 5-7 minutes, including discussion and activity. Prepared October 18, 2026; recheck current requirements before use.
Show the crew
Locate the washout and nearest drainage routes on the map.
Ask the crew
What should happen?
Can washout be directed to bare soil by default?
Sign-In Sheet — Concrete Washout: Keep the Slurry Out of Storm Drains