The
rush
into
the
state’s
natural-gas
rich
Haynesville
shale
play
several
years
ago
helped
kick
off
the
still-rising
tide
of
exploiting
onshore
oil
and
gas
from
horizontal
wells
using
the
process
known
as
hydraulic
fracturing.
But
both
state
and
federal
regulators
have
fallen
under
increasing
pressure
to
disclose
chemicals
used
in
drilling
processes,
which
have
raised
concerns
among
environmentalists
about
contamination
of
ground
water.
“With
the
intense
development
of
the
Haynesville
Shale
and
in
the
interest
of
being
protective
of
the
environment,
revising
our
rules
provides
substance
and
transparency,”
the
state's
Commissioner
of…