220 OLYMPIC BLVD VA OUTPATIENT CLINIC 2023-02-09

I I Maintenance Operations • Use drip pans or absorbents wherever concrete,asphalt, asphalt emulsion, paint product,and drips are likely to spill,such as beneath discharge points from equipment. • Cover and contain nearby storm drains to keep runoff from entering the drainage system. I • Collect and contain all solids,slurry,and rinse water. Do not allow these to enter gutters, storm drains,or drainage ditches or onto the paved surface of a roadway or driveway. • Designate an area onsite for washing hand tools and collect that water for disposal. • Conduct all fueling of equipment in accordance with S419 BMPs for Mobile Fueling of Vehicles and Heavy Equipment. • Do not use diesel fuel for cleaning or prepping asphalt tools and equipment. • Sweep areas as frequently as needed. Collect all loose aggregate and dust for disposal. Do not hose down areas into storm drains. • Store all fuel, paint,and other products on secondary containment. • Conduct paint striping operations during dry weather. Recommended Additional BMPs: • Where feasible and practicable, use roadway deicing chemicals that cause the least adverse environmental impact.Apply only as needed using minimum quantities. Consider the Pacific Northwest Snowfighters Qualified Products List when selecting roadway de-icers and anti- icers. • Intensify roadway and drainage structure cleaning in early spring to help remove particulates from road surfaces. • Include limits on toxic metals in the specifications for de/anti-icers. • Install catch basin inserts to collect excess sediment and debris as necessary. Inspect and maintain catch basin inserts to ensure they are working correctly. • Research admixtures(e.g. corrosion inhibitors, surfactants)to determine what additional pol- lutants may be an issue.Verify with the local jurisdiction if there are any restrictions on admix- tures. S415 BMPs for Maintenance of Public and Private Utility Corridors and Facilities Description of Pollutant Sources: Corridors and facilities at petroleum product pipelines, natural gas pipelines,water pipelines,electrical power transmission corridors,and rights-of-way can be sources of pollutants such as herbicides used for vegetation management,and eroded soil particles from unpaved access roads.At pump stations,waste materials generated during maintenance activ- ities may be temporarily stored outside.Additional potential pollutant sources include the leaching of 2019 Stormwater Management Manual for Western Washington Volume IV-Chapter 3-Page 513