Revision History for SIR 2012-5257 Eliza L. Gross and Dennis J. Low Arsenic Concentrations, Related Environmental Factors, and the Predicted Probability of Elevated Arsenic in Groundwater in Pennsylvania ----------------------------------------------------- Posted online February 28, 2013 ----------------------------------------------------- Geospatial dataset added April 24, 2013 Added link on report page to readme.txt and ZIP file containing statewide geospatial dataset (in Esri Grid format) associated with SIR 2012-5257. No changes to the report PDF.