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Surface Being Cleaned Wash Wastewater Disposal Requirement Other Requirements/Suggestions All surfaces cleaned using corrosives, or other harmful chemicals, or that may have hazardous materials (e.g. lead paint) on it • NO DISCHARGE TO STORM DRAINS • Wash wastewater must be contained collected and recovered for approved off-site disposal Disposal of wastewater containing hazardous substances must be appropriately documented (retain disposal receipts) • Parking lots • Roadways • Driveways • Drive-thrus • Loading docks • Dumpster & Compactor Areas • Any other potentially polluted surfaces • NO DISCHARGE TO STORM DRAINS • Discharge to sanitary sewer equipped with pretreatment device (oil/water separator, interceptor, filters, etc.) or collected for approved off-site disposal. Contact your local sewer authority for specific details [PHONE REDACTED] * No discharge to septic systems * Collect/recover wash wastewater * Wash wastewater must be filtered for oil, sediment, and debris before discharging to sanitary sewer * Heated water and detergents okay to sanitary sewer Outdoor eating areas or sidewalk cafes • Discharge to storm drains of heated water, detergents, soaps, or other additives is prohibited • Discharge to storm drains allowed if wash wastewater is filtered (e.g. catchbasin insert filter) • Discharge to sanitary sewer may be required if the surface has excessive staining and/or other pollutant build-up that may contaminate stormwater * Sweep up or vacuum loose debris prior to pressure washing * Discharge wash wastewater to landscaped areas if possible * City may determine excessive pollution is occurring and prohibit storm drain discharge • Pedestrian-use sidewalks, with typical dust, moss, and algae build-up • Building exteriors • Roofs • Discharge to storm drains of heated water, detergents, soaps, or other additives is prohibited • Extremely muddy or turbid wastewater bypassing filtration is prohibited • Discharge to storm drains allowable if wash wastewater is filtered * Discharge wash wastewater to landscaped areas if possible * City may determine excessive pollution is occurring and prohibit storm drain discharge CITY OF REDMOND PRESSURE WASH WASTEWATER DISPOSAL REQUIREMENTS (Redmond Municipal Code 13.06) Call the City of Redmond at [PHONE REDACTED] for questions or clarification