35 Ill. Adm. Code 506.302
Site Investigation
Section 506
Section 506.302 Site
Investigation
a) The owner or operator of a livestock waste handling facility must
conduct a site investigation in compliance with this Section to determine the
following:
1) Whether aquifer material is considered present (or not
present) within 5 feet of the planned bottom of the livestock waste handling
facility;
2) Whether the proposed facility is to be located within the
floodway or flood fringe of a 100-year floodplain; and
3) Whether the proposed facility is to be located within a karst
area or within 400 feet of a natural depression in a karst area.
b) Except for facilities that are proposed to be located within
an area designated as "Sink hole areas" on "Karst Terrains and
Carbonate Rocks of Illinois", IDNR-ISGS Illinois Map 8, the owner or
operator must obtain soil samples from within the final livestock waste
handling facility area or within 20 feet of the livestock waste handling
facility boundaries. The sampling must be performed to determine the presence
of aquifer material or karstified carbonate bedrock as follows:
1) The soil sampling must begin at the soil surface and extend to
a depth that includes a minimum of 5 feet below the planned bottom of the livestock
waste handling facility native soil or to bedrock;
2) If bedrock is encountered, additional soil samplings may be
necessary to verify the presence of aquifer material or karstified carbonate
bedrock;
3) Continuous samples must be recovered from each soil sampling;
and
4) Upon completion, any boring used for sampling must be properly
abandoned and sealed under the Illinois Water Well Construction Code at 77 Ill.
Adm. Code 920.120. Any excavation used for sampling that is within the
construction boundaries of the livestock management facility or livestock waste
handling facility must be restored by adding soil compacted in lifts no greater
than 6 inches.
c) If the Department determines that additional soil samplings
are necessary to ensure the protection of the groundwater, the surface water,
or the structural integrity of the livestock waste handling facility, the
Department must require additional soil samplings.
d) As an alternative to performing the soil sampling required
under subsection (b) or (c), the owner or operator of the livestock waste
handling facility may propose to the Department to use alternative information sources.
The Department must evaluate the proposal; determine whether the alternative
information sources will result in a site investigation that will be at least
as protective of the groundwater, the surface water, and the structural
integrity of the livestock waste handling facility as would have resulted from
data resulting from soil borings; and notify the owner or operator of the
Department's finding.
e) Despite the other requirements of this Subpart, if aquifer
material is located above or within 5 feet of the lowest point of the livestock
waste handling facility, the design of the facility must comply with Section
506.310.
f) Despite the other requirements of this Subpart, if the site
investigation determines that the livestock waste handling facility is to be
located in the flood fringe of a 100-year floodplain, the design of the
facility must comply with Section 506.311.
g) If the proposed livestock waste handling facility is to be
located within an area designated as "Sink hole areas" on "Karst
Terrains and Carbonate Rocks of Illinois", IDNR-ISGS Illinois Map 8 or if
the results of the soil sampling conducted under Section 506.302(b) indicate
the proposed livestock waste handling facility is to be located in a karst
area, the following requirements must be met:
1) The Department must conduct a visual inspection of the
surrounding area to determine the presence of natural depressions during the
pre-construction site inspection as required under 8 Ill. Adm. Code
900.505(a). Construction must not occur within 400 feet of a natural depression
in a karst area;
2) The owner or operator must perform one or more soil borings
that must be located within the final livestock waste handling facility area or
within 20 feet of the livestock waste handling facility boundaries to determine
the presence of voids. The boring must begin at the soil surface and extend to
a depth that includes a minimum of 20 feet below the planned bottom of the
livestock waste handling facility;
3) Continuous samples must be recovered from each boring;
4) The Licensed Professional Engineer, Licensed Professional
Geologist, or USDA-NRCS representative designated to perform such functions must
evaluate the results of the soil boring. If a void of 1 foot or greater in
vertical distance is discovered from the soil boring performed under subsection
(g)(2), the following requirements must be met:
A) The Department may require additional borings to determine the
extent of the void;
B) Despite the other requirements of this Subpart, the owner or
operator must submit to the Department a plan for the design of the facility
that must include the additional design requirements in Section 506.312 and must
include any additional design requirements necessary by the Licensed
Professional Engineer; and
C) The Department must review and approve the plan required under
subsection (g)(4)(B) before construction. The Department may also require
additional design criteria before the plan is approved and construction may
begin.
If no voids of
1 foot or greater in vertical distance are discovered from the soil boring
performed, the design must include the additional requirements in Section
506.312.
5) Upon completion of the borings required under subsection (g),
the borings must be properly abandoned and sealed under the Illinois Water Well
Construction Code at 77 Ill. Adm. Code 920.120.
h) The site investigation in compliance with subsections (b),
(c), (d), (e), (f), and (g) must be conducted under the direction of a Licensed
Professional Engineer, a Licensed Professional Geologist, or a representative
of the USDA-NRCS designated to perform such functions.