There are various local environmental impacts from shale gas fracking

There are various local environmental impacts from shale gas
fracking: the excessive water use, groundwater contamination
and wastewater handling as discussed above, as well as noise,
odours, and the disposal of solid wastes. In order to prevent contamination,
the integrity of fracking wells must be ensured. Guidelines
for achieving this were recommended in the RS/RAEng report
28, which are largely reflected in documents produced by the
American Petroleum Institute and the HSE that are recommended
by DECC 41. It is believed that properly designed wells should
not pose a risk of contamination to underground aquifers 41. Of
course regulation, however good, is ineffective without rigorous
enforcement backed by seriously deterrent penalties. Both well
design and construction are overseen by an Independent Well Examiner
and the HSE Wells Inspector. No operation can commence
before an inspection by the independent examiner (employed by
the operating company or a contractor) who oversees the design,
construction and maintenance of a well 42. However fully independent
monitoring of the wells which was recommended by the
RS/RAEng report was rejected during the enactment of the UK
Infrastructure Act 2015 43, primarily leaving the reporting of leakages
up to the operating company. Furthermore, the monitoring or
management of abandoned wells remains unclear, particularly if