In a letter to EPA Administrator Gina McCarthy, the board (SAB) says the draft report, released last year, was comprehensive but lacked in "certain critical areas".
In particular, the board said it was concerned about the report's conclusion that it did not find any evidence that fracking had led to widespread or systemic contamination on drinking water.
"The SAB finds that the EPA did not support quantitatively its conclusion about lack of evidence for widespread, systemic impacts of hydraulic fracturing on drinking water resources, and did not clearly describe the system(s) of interest (e.g.,
