a) The Agency must evaluate a request for a
SEP from the monitoring requirements of Section
611.601,
611.602,
or
611.603
(IOCs, excluding the Section
611.603
monitoring frequency requirements for cyanide); Section
611.646(e)
and (f) (Phase I, Phase II, and Phase V
VOCs); Section
611.646(d),
only as to initial monitoring for 1,2,4-trichlorobenzene; or Section
611.648(d)
(for Phase II, Phase IIB, and Phase V SOCs) on the basis of knowledge of
previous use (including transport, storage, or disposal) of the contaminant in
the watershed or zone of influence of the system, as determined under 35 Ill.
Adm. Code
671.
BOARD NOTE: The Agency must grant a SEP from the Section
611.603
monitoring frequency requirements for cyanide only on the basis of subsection
(c), not on the basis of this subsection (a).
1) If the Agency determines that there was no
prior use of the contaminant, it must grant the SEP; or
2) If the contaminant was previously used or
the previous use was unknown, the Agency must consider the following factors:
A) Previous analytical results;
B) The proximity of the system to any
possible point source of contamination (including spills or leaks at or near a
water treatment facility; at manufacturing, distribution, or storage
facilities; from hazardous and municipal waste land fills; or from waste
handling or treatment facilities) or non-point source of contamination
(including the use of pesticides and other land application uses of the
contaminant);
C) The environmental
persistence and transport of the contaminant;
D) How well the water source is protected
against contamination, including whether it is a SWS or a GWS.
i) A GWS must consider well depth, soil type,
well casing integrity, and wellhead protection; and
ii) A SWS must consider watershed
protection;
E) For Phase
II, Phase IIB, and Phase V SOCs, as follows:
i) Elevated nitrate levels at the water
source; and
ii) The use of PCBs in
equipment used in the production, storage, or distribution of water (including
pumps, transformers, etc.); and
F) For Phase I, Phase II, and Phase V VOCs
(under Section 611.646): the number of persons served by the PWS and the
proximity of a smaller system to a larger one.
b) If a supplier refuses to provide any
necessary additional information requested by the Agency, or if a supplier
delivers any necessary information late in the Agency's deliberations on a
request, the Agency may deny the requested SEP or grant the SEP with conditions
within the time allowed by law.
c)
The Agency must grant a supplier a SEP that allows it to discontinue monitoring
for cyanide if it determines that the supplier's water is not vulnerable due to
a lack of any industrial source of cyanide.
