Correction: Elevated levels of diesel range organic compounds in groundwater near Marcellus gas operations are derived from surface activities(Proc Natl Acad Sci U S A. (2015) 112:43 (13184-9) DOI: 10.1073/pnas.1511474112)

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.