TagArsenic(16)

EPA Integrated Risk Information System (IRIS) QuickView pages for Antimony (CASRN 7440-36-0) and Arsenic, inorganic (CASRN 7440-38-2), accessed February 14, 2002. Antimony oral RfD is 4×10-4 mg/kg-day based on LOAEL of 0.35 mg/kg-day from Schroeder et al. 1970 rat chronic oral bioassay; confidence rated Low. Arsenic oral RfD is 3×10-4 mg/kg-day based on NOAEL of

The Washington State Department of Ecology's Tacoma Smelter Plume Project investigates soil contamination caused by air emissions from the former Asarco smelter, with the primary goal of protecting public health and the environment from low-level, area-wide contamination. The project aims to keep local governments and citizens informed while developing long-term solutions to manage contamination over time. As part of a broader Area-Wide Contamination Strategy, the state is also addressing similar issues at other sites, including the Everett Smelter and former agricultural lands.

A January 2002 internal email from Washington State Department of Ecology staff raises concerns about elevated levels of metals, particularly lead and arsenic, in fill material being used for the 3rd Runway construction at Sea-Tac Airport. The issue was flagged by the City of Burien as a community sensitivity, with worries that it could become a broader concern for neighboring communities including SeaTac, Normandy Park, and Tukwila. The email seeks clarification on the rationale behind allowable arsenic and lead levels in the runway fill, drawing a comparison to stricter restrictions previously placed on arsenic exports from the Maury Island gravel pit.

Memorandum dated November 1, 2001 from Elizabeth Leavitt (Port Of Seattle) to Muffy Walker (U.S. Army Corps of Engineers) regarding Army Corps Section 404 review of on-site borrow areas for Sea-Tac Airport Third Runway embankment fill. Covers Borrow Areas 1, 3, and 4 located in Des Moines and SeaTac; combined 6.1 million cubic yards of

This Washington State University Extension bulletin explains how lead and arsenic can contaminate home garden soils through historical sources such as lead-based paint, leaded gasoline, and arsenical pesticides, and why this poses health risks especially for children. It provides guidance on identifying contaminated soils through chemical testing and offers practical steps gardeners can take to reduce their exposure to these toxic elements.

Washington State Department of Ecology (Ecology) Publication #94-115 reporting natural background concentrations of metals in surficial soils throughout Washington State, based on a seven-year study co-sponsored by USGS Water Resources Division (Tacoma Office). Study divided Washington into 24 regions, selected 12 for statewide assessment, collected 490 soil samples from 166 locations including Puget Sound, Clark