WSDOT BMP'S FOR STORMWATER RUNOFF IN CONFINED SPACES

Confined spaces Best Management Practices (BMPs) were discussed in regard to hydraulic and pollutant removal performances. Various filter media having potential for use in filtration vaults were evaluated. Column tests using fifteen types of filter media [aquarium rocks, cedar bedding, charcoal, corn cobs, garden bark, glass beads, kitty litter, iron oxide coated sand, peat moss, persolite, sand, CH zeolite, XY zeolite, sand/steel wool, and Washington State University (WSU) compost] were run with a synthetic stormwater runoff influent. Effluent samples were collected over time and analyzed for cadmium, copper, lead, zinc, nitrate, phosphate, pH, Total Suspended Solids (TSS), and Total Petroleum Hydrocarbon (TPH). Results indicate that garden bark, peat moss, sand, and WSU compost are the best filter media for treating stormwater runoff in vaults. Initially, they have acceptable hydraulic properties to pass water through the filters and have good pollutant removal abilities. Over time, however, evidence of clogging can be seen. Further field testing is recommended to determine actual operation and maintenance schedules. Design guidelines are included for the recommended filter media.

Language

  • English

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 115 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00778840
  • Record Type: Publication
  • Report/Paper Numbers: WA-RD 451.1,, Final Report
  • Contract Numbers: T9902-17
  • Files: NTL, TRIS, USDOT, STATEDOT
  • Created Date: Nov 4 1999 12:00AM