a) The
owner or
operator must obtain and analyze samples from the installed
groundwater monitoring system. The owner or
operator must develop and follow a
groundwater sampling and analysis plan. The owner or
operator must keep this
plan at the
facility. The plan must include procedures and techniques for each
of the following:
1) Sample
collection;
2) Sample preservation
and shipment;
3) Analytical
procedures; and
4) Chain of custody
control.
BOARD NOTE: See "Procedures Manual For Ground Water
Monitoring At Solid Waste Disposal Facilities", USEPA document number
EPA-530/SW-611, and "Methods for Chemical Analysis of Water and Wastes", USEPA
document number EPA-600/4-79-020, incorporated by reference in 35 Ill. Adm.
Code
720.111(a),
for discussions of sampling and analysis procedures.
b) The owner or
operator must
determine the concentration or value of the following parameters in groundwater
samples in accordance with subsections (c) and (d):
1) Parameters characterizing the suitability
of the groundwater as a drinking water supply, as specified in Appendix
C.
2) The following parameters
establishing groundwater quality:
A)
Chloride,
B) Iron,
C) Manganese,
D) Phenols,
E) Sodium, and
F) Sulfate.
BOARD NOTE: These parameters are to be used as a basis for
comparison in the event a groundwater quality assessment is required under
Section
725.193(d).
3) The following parameters used
as indicators of groundwater contamination:
A) pH,
B) Specific Conductance,
C) Total Organic Carbon, and
D) Total Organic Halogen.
c) Establishing
Background Concentrations
1) For all
monitoring wells, the owner or operator must establish initial background
concentrations or values of all parameters specified in subsection (b). The
owner or operator must do this quarterly for one year.
2) For each of the indicator parameters
specified in subsection (b)(3), the owner or operator must obtain at least four
replicate measurements for each sample and determine the initial background
arithmetic mean and variance by pooling the replicate measurements for the
respective parameter concentrations or values in samples obtained from
upgradient wells during the first year.
d) After the first year, the owner or
operator must sample all monitoring wells and analyze the samples with the
following frequencies:
1) Samples collected to
establish groundwater quality must be obtained and analyzed for the parameters
specified in subsection (b)(2) at least annually.
2) Samples collected to indicate groundwater
contamination must be obtained and analyzed for the parameters specified in
subsection (b)(3) at least semi-annually.
e) The owner or operator must determine the
elevation of the groundwater surface at each monitoring well each time a sample
is obtained.
