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(b) The owner or operator shall provide geological names, a
geological description, and the depth of the formation into
which well stimulation fluids are to be injected.
(c) The owner or operator shall provide detailed
information to the Director concerning the base stimulation
fluid source. The owner, operator, or service company shall
also provide to the Director, for each stage of the well
stimulation program, the following:
(1) each stimulation fluid identified by additive
(2) the chemical compound name and Chemical
Service (CAS) number for each additive used.
(d) The owner or operator shall also provide a detailed
description of the proposed well stimulation design, which
(1) the anticipated surface treating pressure range;
(2) the maximum injection treating pressure; and
(3) the estimated or calculated fracture length and
(e) The Department shall post the information that it
receives under subsections (b), (c), and (d) on its Internet
website for a period of not less than 5 years.
(f) The injection of volatile organic compounds, such as
benzene, toluene, ethylbenzene, and xylene, also known as BTEX
compounds, or any petroleum distillates, into an underground
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source of drinking water is prohibited without exception. The
proposed use of volatile organic compounds, such as benzene,
toluene, ethylbenzene, and xylene, also known as BTEX
compounds, or any petroleum distillates, for well stimulation
into hydrocarbon bearing zones is only authorized with prior
written approval of the Director. Produced water containing
trace amounts of naturally occurring petroleum distillates may
be used as a stimulation fluid in hydrocarbon-bearing zones.
(g) In addition to any other information that it must
provide, the owner, operator, or service company shall provide
the Director the following post well stimulation detail:
(1) the actual total well stimulation treatment volume
(2) detail as to each fluid stage pumped, including
actual volume by fluid stage, proppant rate or
concentration, actual chemical additive name and type;
(3) the actual surface pressure and rate at the end of
each fluid stage and the actual flush volume, rate, and
final pump pressure; and
(4) the instantaneous shut-in pressure, and the actual
15-minute and 30-minute shut-in pressures when these
pressure measurements are available.
(h) During the well stimulation operation, the owner or
operator shall monitor and record the annulus pressure at the
bradenhead. If intermediate casing has been set on the well
being stimulated, the pressure in the annulus between the
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intermediate casing and the production casing shall also be
monitored and recorded. A continuous record of the annulus
pressure during the well stimulation shall be submitted.
(i) If, during the stimulation, the annulus pressure
increases by more than 500 pounds per square inch gauge (psig)
compared to the pressure immediately preceding the
stimulation, the owner or operator shall verbally notify the
Director as soon as practical but no later than 24 hours
following the incident and must complete in a timely manner any
corrective action identified by the Department. The owner or
operator shall include a report containing all details
pertaining to the incident, including corrective actions
(j) The owner or operator shall provide information to the
Director as to the amounts, handling, and, if necessary,
disposal at an identified appropriate disposal facility, or
reuse of the well stimulation fluid load recovered during flow
back, swabbing, or recovery from production facility vessels.
Storage of that fluid shall be protective of an underground
source of drinking water as demonstrated by the use of either
tanks or lined pits.
(k) Nothing in this Section shall be construed to allow the
Director to require the disclosure of trade secrets as defined
in the Illinois Trade Secrets Act.
(l) The Department shall adopt all rules necessary to
enforce this Section.