Tacoma Smelter Plume.Arsenic and lead levels are considered to be of concern, not an emergency....
Shannon & Wilson: Des Moines Creek Basin Plan Regional Detention Facility
CLIENT King County Water & Land Resource Division Location SeaTac, WA The Des Moines Creek Regional Detention/ Retention Facility (RDF) is intended to provide stormwater storage, reduce peak flows and erosion, enhance habitat, and protect the Des Moines Creek Watershed. During RDF’s initial design, the team identified elevated levels of arsenic in site wetland soils proposed for