220 OLYMPIC BLVD VA OUTPATIENT CLINIC 2023-02-09

1 I I I 1 I I I 5406 BMPs for Streets and Highways I Description of Pollutant Sources: These BMPs apply to the maintenance and deicing/anti-icing of streets and highways. Deicing products can be conveyed during storm events to inlets/catch Ibasins or to receiving waters after application. Leaks and spills of these products can also occur dur- ing their handling and storage. Equipment and processes using during maintenance can contribute pollutants such as oil and grease, suspended solids,turbidity, high pH,and metals. IPollutant Control Approach:Apply good housekeeping practices, preventative maintenance, properly train employees,and use materials that cause less adverse effects on the environment. I Applicable BMPs: IDeicing and Anti-Icing Operations . Adhere to manufacturer's guidelines and industry standards of use and application. I . Store and transfer de and anti-icing materials on impervious containment pads,or an equi- valent spill/leak containment area in accordance with S429 BMPs for Storage or Transfer I (Outside)of Solid Raw Materials, Byproducts, or Finished Products. • Sweep/clean up accumulated de and anti-icing materials and grit from roads as soon as pos- sible after the road surface clears. I . Minimize use in areas where runoff or spray from the roadway immediately enters sensitive areas such as fish-bearing streams. I I 2019 Stormwater Management Manual for Western Washington Volume IV-Chapter 3-Page 512