My comments on the draft TSD strongly advocated an independent EPA review of the science rather then relying on the science presented in reports prepared by the UN Intergovernmental Panel on Climate Change. The OIG review does not deal with the validity of the science–only the procedures used in preparing the TSD. But among the OIG conclusions were the following that appear to be related to my recommendation:

“We found that EPA did not contemporaneously document how it applied and considered the assessment factors in determining whether the IPCC and other assessment reports were of sufficient quality, objectivity, utility, and integrity. EPA described the IPCC review procedures and how they met EPA data quality requirements in the proposed and final rulemakings. However, the Agency did not conduct any independent evaluations of IPCC’s compliance with IPCC procedures, nor did EPA document any specific processes it employed to evaluate the scientific and technical information included in IPCC’s AR4 prior to EPA disseminating that information.”

“Because EPA used information from other organizations to support its findings, EPA, in evaluating whether to disseminate that information, should have determined whether the assessments referenced in the TSD (e.g., IPCC’s AR4) complied with EPA’s information quality guidelines, and whether the peer reviews of these assessments met OMB’s requirements for peer review of scientific assessments. U.S. government acceptance of the documents did not relieve EPA of its responsibility to determine whether the data met EPA’s information quality guidelines before disseminating the information.”

For more information and a link to the OIG review see here.