The database file containing the data for these figures can be found here (5 Mb). This appears to be an Office 97 Access database and it is not very user friendly. More up to date data (which appears to include the data above) can be accessed via the the EIM Query System at the Department of Ecology website. The data can be exported in a format that can be easily imported into a spreadsheet or database.

The home page for the EIM system is here:
http://www.ecy.wa.gov/services/as/iip/eim/index.html

Data can be accessed here:
http://apps.ecy.wa.gov/eimreporting/Search.asp?Type=Study
The Smelter relater studies can be found by entering TSP in the Study Identifier field and executing a search (click here to go directly to those results).