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Slurry & Washwater
At Craftsman Concrete Floors, we collect and contain slurry and washwater generated during wet grinding and polishing. We never discharge this waste into storm drains or waterways. Before work begins, we establish an approved disposal method that meets the project’s applicable requirements.
We recover slurry before it dries to help prevent silica dust from being released back into the air. Collection, containment, and disposal are part of our polished concrete installation planning.
Contain slurry and washwater during polishing
Slurry left on the floor during wet work can dry and become a source of airborne dust, so we remove and contain it with suitable extraction equipment before it dries. Cleaning between grinding and honing passes produces washwater, which we recover rather than allowing it to escape into drains or adjacent work areas.
Collect slurry before it dries
Using water to control grinding dust does not eliminate the need for cleanup. Residue left on the floor can dry and become a source of airborne dust.
We use suitable slurry extraction equipment to remove and contain the material during wet work. This follows the approach described in the Concrete Polishing Council’s guide specification and OSHA’s floor-grinder guidance, which advises cleaning up slurry before it dries and releases silica dust.
Collection and cleanup work alongside the other silica exposure controls used on the project.
Recover washwater between passes
Cleaning between grinding and honing passes produces additional waste solution. We recover that washwater rather than allowing it to escape into drains or adjacent work areas.
Where ACI SPEC-310.1-20 applies:
- Between grinding passes, scrub and rinse the slab with clean water and a cleaning surfactant to lift surface salts and laitance, then recover the solution with an autoscrubber.
- Between honing passes, scrub and rinse with clean water, then recover the solution with an autoscrubber.
- Dispose of the grinding washwater in accordance with applicable local, state, and federal requirements.
These provisions apply when the specification is incorporated into the project documents. Project-specific contract documents govern conflicts with the ACI specification.
Route waste to an approved destination
Our disposal planning establishes where the waste is contained, the receiving facility’s acceptance requirements, how it reaches the approved destination and who is responsible for arranging removal and disposal. Storm drains and waterways are excluded as destinations. A sanitary sewer is not assumed to be an approved destination; any proposed sewer discharge must meet the receiving wastewater authority’s requirements.
How Craftsman arranges disposal
Our disposal planning establishes:
- Where collected slurry and washwater will be contained.
- The receiving facility’s acceptance requirements, including testing or waste characterization where required.
- How the material will reach the approved destination.
- Who is responsible for arranging removal and disposal.
Collecting the waste is only the first step. Its disposal must also meet the requirements for the actual project and receiving facility.
No discharge into storm drains or waterways
Craftsman never discharges polishing slurry or washwater into storm drains or waterways. Our collection and containment arrangements are intended to keep the waste out of those systems.
A sanitary sewer is a separate question. We do not assume that a connection to a treatment plant makes it an approved destination for construction wastewater. Any proposed sewer discharge must meet the receiving wastewater authority’s requirements.
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Frequently Asked Questions
We collect and contain slurry and washwater during wet work, recover it before it dries, and use an approved disposal method that meets applicable requirements. Disposal arrangements are established before work begins.
We never discharge polishing slurry or washwater into storm drains or waterways. A sanitary sewer is considered only where the receiving wastewater authority permits the discharge and its conditions are met.
Slurry left to dry can release silica dust into the air. Collecting and containing it before drying addresses that dust source and prepares the material for disposal.
No. Wet methods control dust during the work, but slurry can become a dust source after it dries. Collection and cleanup remain part of the exposure-control process.
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