Revision History for SIR 2010-5206 Betzaida Reyes Occurrence and Distribution of Organic Chemicals and Nutrients and Comparison of Water-Quality Data from Public Drinking-Water Supplies in the Columbia Aquifer in Delaware, 2000–08 ----------------------------------------------------- Posted online December 2010 ----------------------------------------------------- Revised and reposted March 31, 2011 Technical corrections were made to SIR 2010-5206. -----------------------------------------------------