Supporting Information

Research Article

Assessment and risk analysis of casing and cement impairment in oil and gas wells in Pennsylvania, 2000–2012

Anthony R. Ingraffea, Martin T. Wells, Renee L. Santoro, and Seth B. C. Shonkoff

^aSchool of Civil and Environmental Engineering and
^cDepartment of Statistical Sciences, Cornell University, Ithaca, NY 14853;
^bPhysicians, Scientists, and Engineers for Healthy Energy, Ithaca, NY 14850;
^dPhysicians, Scientists, and Engineers for Healthy Energy, Oakland, CA 94612; and
^eDepartment of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720-3114

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PNAS first published June 30, 2014; https://doi.org/10.1073/pnas.1323422111

Anthony R. Ingraffea

aSchool of Civil and Environmental Engineering and

bPhysicians, Scientists, and Engineers for Healthy Energy, Ithaca, NY 14850;

Martin T. Wells

cDepartment of Statistical Sciences, Cornell University, Ithaca, NY 14853;

Renee L. Santoro

bPhysicians, Scientists, and Engineers for Healthy Energy, Ithaca, NY 14850;

Seth B. C. Shonkoff

dPhysicians, Scientists, and Engineers for Healthy Energy, Oakland, CA 94612; and

eDepartment of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720-3114

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