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Before pressure or exterior washing

The job is not finished
when the surface is clean.

Ask where debris and wash water will go before approving exterior cleaning. The disposal plan depends on the surface, contaminants and local requirements.

Put disposal into the scope

  1. Name the surfaces. Separate driveways, walkways, roof areas and building exteriors. Do not assume one disposal approach applies to all of them.
  2. Describe known contaminants. Tell the provider about oil, peeling paint, concrete residue or cleaning products. Ask what the crew will assess before starting.
  3. Locate the drainage route. Ask how downhill drains and nearby water will be protected, and whether water must be collected rather than allowed to run off.
  4. Confirm the destination. If the proposal includes sanitary-sewer or off-site disposal, ask what approval or pretreatment is needed and who is responsible.
  5. Record cleanup. Include collected debris, filters, wastewater and the site condition expected at completion.
There is no blanket “filtered means permitted” rule.

City instructions distinguish surfaces and contaminants. Follow current instructions for the actual site rather than extrapolating from an example on another city’s page.