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| 2000 | Vashon-Maury Island – Undisturbed Area Study - examines forested properties. |
| 2002 |
Mainland King County Preliminary Study
- finds elevated arsenic and lead levels Fact Sheet |
| 2002 | Pierce County Footprint Study - finds results consistent with King County studies. |
| 2005 | Extended Footprint Study provides updated maps of the extent of soil pollution around the central Puget Sound region. |
| 2001 | Vashon-Maury Island Child-use Area Study - tests play areas at 34 schools, childcares, parks and camps. |
| 2002 | Dockton Park Resample Study - follows up the Vashon-Maury Island Study. |
| 2003 | Mainland King County Child-use Area Study - finds elevated arsenic and lead at about 10% of play areas tested. |
| Pierce County Child-use Area Study - finds elevated arsenic and lead at about 30% of play areas tested. | |
| Vashon-Maury Island School District Child-use Area Resample - finds lower arsenic and lead levels at schools testing a method for reducing soil pollution. |
| 2001 | Survey of Typical Soils Arsenic Concentrations in Residential Areas of the City of University Place |
| 2004 | Sources of Contamination - links regional arsenic and lead pollution to Asarco's Tacoma smelter. |
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