Current through March 20, 2024
Authority: IC 13-14-8-7; IC 13-15-2-1; IC 13-19-3-1
Affected: IC 13-30-2; IC 36-9-30
Sec. 3.
An application for restricted waste site Type I or Type II
or nonmunicipal solid waste landfill must be accompanied by the following
information on soils, ground water, and geology, and be certified by a
registered professional engineer or certified professional geologist, either of
whom shall have education or professional experience in hydrogeology or ground
water hydrology:
(1) The number and
location of soil borings completed at the site must be indicated as follows:
(A) There must be at least one (1) boring for
every five (5) acres of fill area up to one hundred (100) acres and one (1)
boring for every ten (10) acres of fill area beyond one hundred (100) acres,
with a minimum of five (5) borings at any site. The borings must be evenly
distributed over the site.
(B)
Borings must be completed to a depth necessary to indicate compliance with the
design standards of 329 IAC 10-26, with a minimum depth of twenty (20) feet
below the depth of waste placement or to bedrock, whichever is
shallower.
(C) At least one (1) of
the required borings in clause (A) for sites less than ten (10) acres and at
least two (2) borings for sites greater than ten (10) acres must be completed
to a depth of at least seventy (70) feet below the depth of waste placement, or
at least twenty (20) feet into the bedrock, whichever is shallower. The deep
borings, where two (2) are required, must be evenly distributed over the
site.
(D) Additional borings,
meeting other requirements, may be required to delineate the boundaries of any
features pertinent to the site design.
(E) The commissioner may vary the minimum
requirements where alternate testing provides comparable information.
(F) The commissioner may require prior
notification of the date and time of soil borings.
(2) Boring logs must include the following:
(A) The date of drilling.
(B) The method of drilling.
(C) The method of backfilling and sealing of
the borehole.
(D) Textural
classification.
(E) The
descriptions for:
(i) the entire depth of the
boring;
(ii) the depths to and
thickness of any water bearing zones; and
(iii) the static water levels immediately
following the boring.
The mean sea level surface elevation at each boring must be
recorded and submitted with the boring log. The textural classification system
utilized must be identified. The commissioner may establish guidance on the
recommended sample descriptions to be utilized.
(3) The following testing
requirements must apply to the minimum number of borings required under
subdivision (1):
(A) Split spoon samples of
the unconsolidated material must be taken at an interval of one (1) per two and
five-tenths (2.5) feet unless the commissioner otherwise authorizes, based on
uniformity of geologic conditions at the site.
(B) For at least three (3) evenly distributed
borings, including one (1) of the deep borings required under subdivision (1),
split spoon samples of the unconsolidated material must be taken on a
continuous basis.
(C) For the deep
borings required under subdivision (1), continuous core samples must be taken
of any bedrock encountered.
(D) A
complete grain size analysis, including Atterberg limits, must be performed on
a representative sample from each significant stratum encountered. A
significant stratum must be defined as a soil layer with a minimum thickness of
eighteen (18) inches which, based on appearance (color and texture), can be
visually distinguished from other layers. More than one (1) stratum may be
represented by a single grain size analysis and Atterberg limits test where
alternating strata of approximately identical color and texture are
encountered. At least one (1) grain size analysis and Atterberg limits test
must be performed for each of the required minimum number of borings.
(E) Hydraulic conductivity tests must be
conducted on each of the required minimum number of borings at a depth of
approximately five (5) feet below the proposed base of waste
placement.
(F) Cation exchange
capacity (CEC) and additional hydraulic conductivity tests must be conducted as
necessary to characterize the major strata proposed for use as base and
sidewall barriers or cover material.
(G) Hydraulic conductivity sampling must
occur by a combination of in situ field tests and laboratory permeability tests
on undisturbed Shelby tube samples. CEC must be determined according to the
ammonium saturation method specified in Part 2 of "Methods of Soil Analysis"
published by the American Society of Agronomy in 1965.
(H) Other tests may be required by the
commissioner to further evaluate soil suitability. The commissioner may vary
the preceding minimum requirements where alternate testing methods provide
comparable information.
(I) All
testing and sampling procedures must be identified, and all results must be
identified with respect to boring and depth.
(4) Boring samples must be collected and
maintained until the solid waste land disposal facility permit is issued, or
until any litigation with regard to the proposed permit is resolved, whichever
is later.
(5) Borings completed for
the purpose of satisfying this section may be converted to piezometers or cased
holes to comply with the requirements of section 4 of this rule.
