a)
The Agency must evaluate a request for a SEP granting relief from 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(f) (a
GWS supplier for 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)
(Phase II, Phase IIB, and Phase V SOCs) under this Section. The Agency must
evaluate on the basis of known previous use (including transport, storage, or
disposal) of the contaminant in the watershed or zone of influence of the
system under 35 Ill. Adm. Code
671.
BOARD NOTE: The Agency may only issue a SEP from the Section
611.603 monitoring frequency for
cyanide based on subsection (c), not based on this subsection (a).
1) If the Agency determines that there was no
prior use of the contaminant in the water system's watershed or zone of
influence, the Agency must issue the SEP; or
2) If anyone previously used the contaminant
or the previous use is unknown, the Agency must consider certain factors:
A) Previous analytical results;
B) The system's proximity 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 local conditions protect the water source against contamination,
including:
i) For a GWS, well depth, soil
type, well casing integrity, and wellhead protection; and
ii) For an SWS, watershed
protection;
E) For Phase
II, Phase IIB, and Phase V SOCs:
i) Elevated
nitrate levels at the water source; and
ii) The use of PCBs in equipment the supplier
uses to produce, store, and distribute water (including pumps, transformers,
etc.); and
F) For Phase
I, Phase II, and Phase V VOCs (under Section
611.646), the number of persons
the PWS serves, and the proximity of a smaller system to a larger
one.
b) If a
supplier refuses to provide any necessary additional information the Agency
requests, or if a supplier delivers any necessary information late in the
Agency's deliberations on a request, the Agency may deny the SEP or issue the
SEP with conditions within the time allowed by law.
c) The Agency must issue a SEP allowing a
supplier to discontinue monitoring for cyanide upon determining that the
supplier's water is not vulnerable to any industrial source of
cyanide.
