Correction for Drollette et al., Elevated levels of diesel range organic compounds in groundwater near Marcellus gas operations are derived from surface activities

ENVIRONMENTAL SCIENCES Correction for “Elevated levels of diesel range organic compounds in groundwater near Marcellus gas operations are derived from surface activities,” by Brian D. Drollette, Kathrin Hoelzer, Nathaniel R. Warner, Thomas H. Darrah, Osman Karatum, Megan P. O’Connor, Robert K. Nelson, Loretta A. Fernandez, Christopher M. Reddy, Avner Vengosh, Robert B. Jackson, Martin Elsner, and Desiree L. Plata, which was first published October 12, 2015; 10.1073/pnas.1511474112 (Proc Natl Acad Sci USA 112:13184–13189).

The authors wish to note the following: “In the original calculation of sorption-retarded transport through porous media, log K_oc (4.998 to 5.078) values were used instead of K_oc values (10^4.998 to 10^5.078 L kg^-1). This propagates to transport times of 0.001 to 4 m·y⁻¹ (over 200 y to migrate a 1-km distance) for the detected phthalates. Critically, we note that this does not change the primary conclusions or principle arguments; the presence of bis(2-ethylhexyl) phthalate would have to occur via some enhanced transport or solubilization process, as discussed in the original contribution.