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Drainage System Information & Inspections
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Pollution Control Inspections
8 High-Risk Pollution Generating Activities
Management practices to reduce stormwater pollution—such as keeping spill control supplies onsite—are required if businesses perform any of the following eight activities that pose a high risk of polluting stormwater.
In the case of new development, such businesses may be required to build structural source controls such as enclosing the pollution generating activities or treating drainage.
Fueling operations
Examples: Transferring fuel into mobile vehicles or equipment at:
- • Permanent stations (such as gas stations)
- • Temporary stations (such as construction sites)
- • Mobile fueling stations (such as mobile tank trucks)
Washing and cleaning vehicles, equipment and buildings
Examples:
- • Mobile vehicle steam cleaning
- • Washing vehicles at commercial car washes and permanent parking facilities (rental car lots and fleet lots)
- • Washing tools or equipment outside
- • Outdoor cleaning of commercial cooking equipment
- • Washing the outside of buildings
- • Mobile interior building cleaning
Loading and unloading liquids or solid materials by truck or rail
Examples:
- • Transferring non-containerized bulk liquids from truck or rail
- • Loading and unloading materials at a commercial or industrial loading dock
Storing liquids in stationary above-ground tanks
Examples: Chemicals, fertilizers, pesticides, solvents, grease or petroleum products.
Storing liquids, food wastes or dangerous wastes in outside portable containers
Examples: Vegetable grease, animal grease, other food wastes, used oil, liquid feedstock, cleaning compounds, chemicals, solid waste or dangerous waste.
Outside storage of non-containerized materials, by-products or finished products
Examples: Non-liquid pesticides or fertilizers, contaminated soil, food products or food wastes, metals, building materials, sand, gravel, road salt and topsoil.
Outside manufacturing
Examples:
- • Processing, fabrication and maintenance or repair of vehicles and equipment
- • Sand blasting, painting, coating or finishing of vehicles, products and equipment
Landscaping construction or maintenance
Examples:
- • Landscape construction and other "land disturbing" activities
- • Fertilizer and pesticide application
- • Disposal of yard waste near a public drainage system
Related links
To help businesses keep their drainage systems in good repair, the City also conducts Maintenance Inspections.
Links to other sites
Resource Venture - Stormwater Pollution Prevention Publications.
Seattle Source Control Technical Requirements Manual (PDF) - Describes City of Seattle requirements for operational and structural source controls to reduce stormwater pollution.
Seattle Department of Planning and Development
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