user's guide and background technical document for the nevada ...

February 2009
1. Corrections to Equations 1 and 4 under Section 2.7.
2. Addition of an Indoor Commercial/Industrial Worker screening values to the BCL Table.
3. Addition of BCLs for lithium, titanium, tungsten, and uranium.
4. Correlation of the “a” footnote in the BCL table to lead.
5. Update to the PEF to reflect the Las Vegas meteorological zone per USEPA (1996a)
guidance.
6. Update to the iron oral reference dose from 0.003 to 0.7 mg/kg-day.
7. Removal of the cancer classification for 1,2-dibromoethane from the BCL table.
8. Oral SF for dicofol added to BCL table.
9. Inhalation RfD updated for ethylene glycol.
10. Inhalation RfD for tetrachloroethylene removed from BCL table.
11. Appendix C and Table C-1 added to present source of “other” toxicity criteria.
June 2009
1. Citations corrected in Table 1.
2. Text edits and reformatting of Guidance Document.
3. BCL for magnesium added to table.
4. Radionuclide BCLs added as Appendix D.
5. Leaching based BCLs (LBCLs) added for Aluminum, Boron, Cobalt, Copper, Iron,
Magnesium, Manganese, Mercury, Molybdenum, Titanium, Tungsten, and Uranium.
6. Asbestos BCL added.
7. Inhalation pathways revised consistent with USEPA RAGS Part F guidance.
8. Toxicity criteria updated with latest values from IRIS.
9. MCLs used as residential tap water BCLs when available.
10. Dioxin/Furan TEQ BCLs updated.
November 2009
1. Technical HCH removed from table.
2. Soil pH for LBCLs stated.
3. Links in the calculation spreadsheet were corrected for the IURs and their associated
citations. It is believed that this error occurred during the June 2009 update. This error is not
believed to have materially impacted the resulting BCLs and is noted here for completeness.
4. Uranium LBCL removed from Appendix E; the main BCL table provides an LBCL for this
constituent.