Current through March 20, 2024
Authority: IC 13-14-8-7; IC 13-15; IC 13-19-3
Affected: IC 13-20; IC 36-9-30
Sec. 1.
(a) The
owner, operator, or permittee of MSWLFs shall comply with the ground water
monitoring requirements of this rule according to the following schedule:
(1) Existing MSWLF units and lateral
expansions less than or equal to two (2) miles from a drinking water surface or
subsurface intake must be in compliance with the applicable ground water
monitoring requirements specified in this rule by April 13, 1996.
(2) Existing MSWLF units and lateral
expansions greater than two (2) miles from a drinking water surface or
subsurface intake must be in compliance with the applicable ground water
monitoring requirements specified in this rule by October 9, 1996.
(3) New MSWLF units must be in compliance
with the applicable ground water monitoring requirements specified in this rule
before waste can be placed in the unit.
(b) Alternative methods, procedures, or
equipment to those prescribed in this rule may be used provided the selected
alternative yields results or measurements that are equivalent in accuracy and
reliability and the use of the alternative is approved by the
commissioner.
(c) The number,
spacing, and location of ground water monitoring wells and piezometers for an
existing MSWLF must comply with the MSWLF's permit. The number, spacing, and
location of ground water monitoring wells and piezometers for new MSWLFs must
meet the requirements of
329
IAC 10-15-5.
(d) All ground water monitoring wells and
piezometers must be affixed with permanent identification that uniquely
identifies each monitoring well at the MSWLF. The owner, operator, or permittee
shall:
(1) number;
(2) label; and
(3) maintain labels;
on all monitoring wells and piezometers.
(e) Ground water monitoring wells
and piezometers must be accessible and visible at all times. Access to
monitoring wells through on-site roads must be available, regardless of weather
conditions. Access to monitoring wells for four (4) wheel drive vehicles must
be provided to ensure vehicle access throughout any season of the year.
Vegetation must be controlled on the on-site roads and around the monitoring
wells and piezometers. Access to all monitoring wells and piezometers approved
by the commissioner must be restricted to operating personnel, department
personnel, and persons contracted by the owner, operator, or permittee to
collect samples.
(f) Ground water
monitoring wells, piezometers, and equipment must be properly maintained to
ensure representative ground water samples. The owner, operator, or permittee
must practice proper maintenance procedures, including the following:
(1) Keep the ground water monitoring wells
securely capped and locked when not in use. The owner, operator, or permittee
shall maintain all the caps and locks.
(2) Make repairs as necessary to correct any
wear, decay, severe corrosion, or physical damage that is observed on or in the
ground water monitoring well, piezometer, or dedicated equipment to maintain
integrity, and submit to the commissioner documentation that the necessary
repairs have been made.
(3)
Maintain proper drainage around each ground water monitoring well head and
piezometer. Repairs as necessary must be made to the concrete apron of the
monitoring well to prevent water infiltration or ponding.
(4) Control vegetation height around each of
the wells.
(5) Redevelop a ground
water monitoring well that has accumulated a silt volume that may compromise
the quality of the sample. The monitoring well must be redeveloped prior to the
next sampling event. One (1) of the following procedures must be used to
determine the need to redevelop the monitoring well:
(A) Any regularly scheduled total depth
measurement that indicates more than twenty percent (20%) of the screen length
has been filled with silt. Any schedule of soundings less often than
semiannually must be approved by the commissioner and based on geohydrological
characteristics of the aquifer or known rate of down-hole siltation.
(B) Semiannual field tests that indicate an
order-of-magnitude rise in turbidity or total solids for sampling points using
dedicated submersed equipment.
(C)
Any other equivalent procedure that has been approved by the
commissioner.
(g) If a ground water monitoring well or a
piezometer is destroyed or otherwise fails to properly function, the owner,
operator, or permittee must comply with the following requirements:
(1) The owner, operator, or permittee shall
provide the commissioner with a written report within ten (10) days of
discovering that the ground water monitoring well or piezometer is destroyed or
not properly functioning. The report must include the following information:
(A) The date of discovery that a ground water
monitoring well or piezometer is destroyed or is not properly
functioning.
(B) The probable cause
of ground water monitoring well or piezometer destruction, damage, or
malfunction.
(C) A proposed repair
or replacement plan, in accordance with the following and with section 4 of
this rule, that is subject to the commissioner's approval:
(i) If the ground water monitoring well or
piezometer is repaired, the following requirements must be fulfilled:
(AA) The owner, operator, or permittee shall
submit to the commissioner a description of the repair methods.
(BB) The owner, operator, or permittee shall
submit to the commissioner the revised design and construction
diagram.
(ii) If the
ground water monitoring well or piezometer is replaced, the following
requirements must be fulfilled:
(AA) The
original ground water monitoring well or piezometer must be properly abandoned
in accordance with subsection (i).
(BB) A description of installation methods
for the replacement of all pertinent ground water monitoring wells or
piezometers, a monitoring well and piezometer design and construction diagram,
and the borehole drilling log must be submitted to the commissioner.
(CC) Replacement ground water monitoring
wells or piezometers must meet the design requirements of section 4 of this
rule
(DD) Replacement ground water
monitoring wells or piezometers constructed within fifteen (15) feet of the
original monitoring well or piezometer may have earthen material sampling and
earthen material sample testing requirements waived by the commissioner if the
original ground water monitoring well or piezometer earthen material sampling
and earthen material sample testing complies with section 4 of this
rule.
(2) Within thirty (30) days after receiving
the commissioner's approval of the plan submitted under subdivision (1)(C), the
ground water monitoring well or piezometer must be repaired or replaced in
accordance with the approved plan.
(3) If discovery of a ground water monitoring
well or piezometer failure coincides with the time of a scheduled sampling
event, the failed monitoring well or piezometer must be sampled immediately
after it has been repaired or replaced.
(h) The owner, operator, or permittee shall
abandon and replace a ground water monitoring well if:
(1) the ground water monitoring well has a
permeable or semipermeable annular sealant; or
(2) any of the following details of the
ground water monitoring well construction are not available:
(A) Screened interval.
(B) Annular sealant material.
(C) Borehole and casing diameters.
(D) Casing and screen material.
(E) Ground elevation and the reference mark
elevation.
(F) Outside casing
diameter and depth.
(G) Filter pack
material.
(i)
The owner, operator, or permittee shall notify the commissioner in writing and
obtain written approval to decommission or abandon any ground water monitoring
well or piezometer. Abandonment procedures must comply with the following:
(1) Abandonment procedures must be:
(A) in compliance with rules of the natural
resources commission at
312 IAC
13-10-2; or
(B) an alternative procedure approved by the
commissioner that provides equivalent environmental protection.
(2) Methods of abandonment must
ensure that slurry does not bridge or become obstructed and that the borehole
is completely sealed.
(3) Attempts
must be made to remove the entire casing from the ground water monitoring well
or piezometer to be abandoned if there is evidence that the integrity of the
annulus between the borehole and monitoring well or piezometer casing has been
compromised.
(4) Accurate records
of the location of the ground water monitoring well or piezometer and the
abandonment procedures must be maintained in the operating records.
(j) All ground water monitoring
wells that have been approved by the commissioner must be used to obtain ground
water to be analyzed for the purpose of this rule.
(k) The commissioner may require additional
ground water monitoring wells and piezometers during the active life, closure,
or post-closure care period of the MSWLF if:
(1) ground water flow data indicate that
ground water flow directions are other than anticipated in the ground water
monitoring system design;
(2)
further evaluation of the hydrogeology of the MSWLF determines that additional
ground water monitoring wells or piezometers are needed; or
(3) additional ground water monitoring wells
and piezometers are necessary to achieve compliance with ground water
monitoring standards under
329
IAC 10-15-5.
(l) The ground water monitoring boundary must
be located:
(1) within the real property
boundary; and
(2) within fifty (50)
feet of the solid waste boundary that has been approved by the commissioner for
final closure, except where fifty (50) feet is not possible because of physical
obstacles or geology. If the owner, operator, or permittee chooses to use
intrawell comparison procedures to evaluate the ground water data, the
monitoring boundary shall be considered to be at the location of each ground
water monitoring well designated for the detection monitoring
program.
(m) The number
of independent ground water samples collected to establish background ground
water quality data must be consistent with the appropriate statistical
procedures in accordance with section 6 of this rule.
(n) Background ground water quality may be
established at ground water monitoring wells that are not located hydraulically
upgradient from the MSWLF solid waste boundary if, as determined by the
commissioner:
(1) hydrogeologic conditions do
not allow the owner, operator, or permittee to determine which ground water
monitoring wells are hydraulically upgradient; or
(2) sampling at other ground water monitoring
wells will provide an indication of background water quality that is as
representative or more representative than that provided by the upgradient
monitoring wells.
(o) If
contamination is detected in any ground water monitoring well used to establish
background ground water quality, the contamination must be investigated, within
the MSWLF's facility boundary, to the extent necessary to determine that the
MSWLF is not the cause of contamination. If an investigation reveals that the
contamination is caused by one (1) or more MSWLF units within the MSWLF, the
owner, operator, or permittee must:
(1)
further assess and investigate the contamination, as specified under section 10
of this rule; and
(2) use any
ground water monitoring well in which the contamination is detected as a
downgradient monitoring well in all ground water monitoring programs.
(p) Each time ground water samples
are collected from ground water monitoring wells at the monitoring boundary,
the owner, operator, or permittee shall prepare and submit to the commissioner
ground water potentiometric-surface maps, or flow maps, of the aquifer being
monitored at the site. Except for subdivisions (5), (11), and (12), which may
be presented in tabular form accompanying the maps, each map must indicate the
following:
(1) A clear identification of the
contour interval for the potentiometric-surface or water table surface of each
aquifer being monitored at the MSWLF.
(2) The ground water monitoring wells and
piezometers:
(A) considered to be upgradient
and background;
(B) considered to
be downgradient; and
(C) for which
there has been no determination due to the hydrogeologic
complexities.
(3) Each
ground water monitoring well's identification and location.
(4) Each piezometer's identification and
location.
(5) The static water
elevations at each ground water monitoring well, referenced to mean sea level
and measured to the nearest one-hundredth (0.01) foot.
(6) Real property boundaries, facility
boundaries, and the solid waste boundaries.
(7) The identification of each aquifer
through either its title or its elevation.
(8) The MSWLF's name and county.
(9) The map scale and a north
arrow.
(10) Ground water flow
arrows.
(11) The date and time of
the measurements for each of the ground water monitoring wells and
piezometers.
(12) The elevation of
the ground surface and the top of the casing at each ground water monitoring
well and piezometer. The elevation of the referenced mark located on top of the
casing of each ground water monitoring well and piezometer must be surveyed to
the nearest plus or minus one-hundredth (± 0.01) foot. The referenced mark must
be used to measure static water levels.
(13) The following information, upon request
by the commissioner:
(A) An updated site
surface topography and surface water drainage patterns as described under
329 IAC
10-15-4(b)(12) if the potentiometric
surface being evaluated is influenced by surface topography.
(B) All water wells and surface water bodies
used as a drinking water source within one-fourth (1/4) mile of the solid waste
boundary.
(C) Any other information
the commissioner determines to be necessary, including ground water flow
gradient and velocity, to evaluate the map information.
(14) Unless the commissioner deems necessary
based on hydrogeological conditions, data for potentiometric surface maps of
the entire site are not required to be collected if one (1) or more of the
following exist:
(A) When very few ground
water monitoring wells are required to be sampled to establish background for
the constituents listed in Table 1A under section 15(a) of this rule.
(B) When very few ground water monitoring
wells need to be sampled to verify a preliminary exceedance.
(C) When very few ground water monitoring
wells are required to be sampled under section 10(b)(1) or 10(e) of this
rule.
(D) When very few ground
water monitoring wells need to be sampled to establish background under section
10(b)(4) of this rule.
(q) Ground water must be monitored as
required in sections 7, 10, and 13 of this rule. The sampling frequency must be
as specified under:
(1) section 7 of this rule
for detection monitoring;
(2)
section 10 of this rule for assessment monitoring; and
(3) section 13 of this rule for corrective
action.
(r) Ground water
samples collected from ground water monitoring wells at the monitoring boundary
for static water elevations must always be:
(1) Obtained from each ground water
monitoring well and each piezometer required to be sampled for the applicable
ground water monitoring program.
(2) Measured to the nearest one-hundredth
(0.01) foot, and referenced to mean sea level.
(3) Obtained as close in time as practical
from each ground water monitoring well or piezometer prior to purging and
sampling. If such a purging and collection sequence is expected to affect the
accuracy of the static water elevation measurements in any other ground water
monitoring well or piezometer in the ground water monitoring system, then water
elevation measurements must be obtained from all ground water monitoring wells
and piezometers prior to purging and sampling any ground water monitoring
well.
(s) The owner,
operator, or permittee shall submit the following information to the
commissioner within sixty (60) days of obtaining the ground water samples in a
sampling event unless a verification sampling program, as described in section
8 of this rule, is implemented:
(1) All static
water elevations measured to the nearest one-hundredth (0.01) foot.
(2) Ground water potentiometric-surface maps,
or flow maps, as specified in subsection (p).
(3) Two (2) unbound laboratory certified
reports, including one (1) original copy, that include the following
information unless otherwise specified by the commissioner:
(A) The detection limit for each chemical
constituent.
(B) The date samples
were collected.
(C) The date
samples were received by the laboratory.
(D) The date samples were analyzed by the
laboratory.
(E) The date the
laboratory report was prepared.
(F)
The method of analysis used for each constituent.
(G) The sample identification number for each
sample. (H) The results of all sample analyses.
(4) Field report sheets as described under
section 2(b)(12) of this rule for each ground water monitoring well sampled and
the field chain of custody form for each sample as described under section
2(b)(14) of this rule.
(5) A report
correlating sample identification numbers with the corresponding ground water
monitoring well identification number and blank identification
numbers.
(6) An explanation of how
the ground water monitoring well sampling sequence as described under section
2(a)(6) of this rule was established for the sampling event.
(7) Two (2) copies of the statistical
evaluation reports as described under section 6(e) of this rule.
(8) When requested by the commissioner, the
following information:
(A) The results of all
laboratory quality control sample analyses, including:
(i) blanks;
(ii) spikes;
(iii) duplicates; and
(iv) standards.
(B) Raw data.
(C) Laboratory bench sheets.
(D) Laboratory work sheets.
(E) Chromatograms.
(F) Instrument printouts.
(G) Instrument calibration records.
(t) Detection
monitoring must be conducted throughout the active life, closure, and
post-closure periods of the MSWLF.
