The report emphasises the need to study baseline conditions before fracking work begins. That way, changes in dissolved methane and other contaminants in ground water, aquifers and streams can be discovered with greater confidence. Induced seismic activity should be continuously monitored and used to slow down or relocate underground injection. Waste water handling is a key issue – regulators must be satisfied that the proposed controls will cope.
Long term liabilities are possible: disused wells could provide a conduit for contamination.
The conclusions are generic, but were developed in the light of the known geology of UK shale. Some UK routine best practice may not be found in all nations e.g. waste water being held in metal tanks in the UK but in open pits in other nations.