1. G. Ginsberg, D. Rice, The NAS Perchlorate Review: Questions Remain about the Perchlorate RfD. Env. Health Perspect. (2005), doi:10.1289/eph.8254 (available at http://dx.doi.org/).
2. U.S. Environmental Protection Agency Unregulated Contaminant Monitoring Program, available at http://www.epa.gov/safewater/ucmr/data.html#2 using the link of UCMR List 1 and List 2 chemical monitoring data.
3. D.P. Hautman, D. Munch, A.D. Eaton, A.W. Haghani, U.S. EPA Method 314.0 (1999) (available at http://www.epa.gov/safewater/methods/sourcalt.html).
4. H.P. Wagner, B.V. Pepich, C. Pohl, D. Later, R. Joyce, K. Srinivasan, B. BeBorba, D. Thomas, A. Woodruff, D.J. Munch, U.S. EPA Method 314.1 (2005) (EPA-815-R-05-009 available at http://www.epa.gov/safewater/methods/sourcalt.html).
5. S.C. Wendelken, D.J. Munch, B.V. Pepich, D.W. Later, C.A Pohl, U.S. EPA Method 331.0 (2005) (EPA-815-R-05-007 available at http://www.epa.gov/safewater/methods/sourcalt.html).