South Carolina Code of Regulations
Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL
Subchapter 61-107 - Solid Waste Management
Subchapter 61-107.19 - SOLID WASTE. MANAGEMENT: SOLID WASTE LANDFILLS AND STRUCTURAL FILL
Part V - CLASS THREE LANDFILLS. (SUBSections A THROUGH F OF THIS PART ARE CODIFIED TO COINCIDE WITH THOSE SUBPARTS IN 40CFR258.)
Subpart E - GROUNDWATER MONITORING AND CORRECTIVE ACTION
Section 61-107.19.V.E.258.51 - Groundwater Monitoring Systems
Universal Citation: SC Code Regs 61-107.19.V.E.258.51
Current through Register Vol. 48, No. 9, September 27, 2024
a. A groundwater monitoring system shall be installed that consists of a sufficient number of wells, installed at appropriate locations and depths, to yield representative groundwater samples from the uppermost aquifer that:
(1) Represent the quality of background
groundwater that has not been affected by leakage from a landfill. A
determination of background quality may include sampling of wells that are not
hydraulically upgradient of the waste management area where:
(a) Hydrogeologic conditions do not allow the
permittee to determine what wells are hydraulically upgradient; or,
(b) Sampling at other wells will provide an
indication of background groundwater quality that is as representative or more
representative than that provided by the upgradient wells; and,
(2) Represent the quality of
groundwater passing the relevant point of compliance approved by the Department
in Section258.40.i. The downgradient monitoring system shall be installed
between the relevant point of compliance and the actual disposal area, and
shall ensure detection of any groundwater contamination in the uppermost
aquifer. When physical obstacles preclude installation of groundwater
monitoring wells at the relevant point of compliance at existing landfills, the
downgradient monitoring system shall be installed at the closest practicable
distance hydraulically downgradient from the relevant point of compliance to
ensure detection of groundwater contamination in the uppermost
aquifer.
b. Reserved.
c. Monitoring wells shall be approved by the Department and constructed, at a minimum, to the standards established in the R.61-71.H., South Carolina Well Standards.
(1) The permittee
shall submit to the Department and place in the operating record, documentation
of the design, installation, development, and abandonment of any monitoring
wells, piezometers and other measurement, sampling, and analytical devices;
and,
(2) The monitoring wells,
piezometers, and other measurement, sampling, and analytical devices shall be
operated and maintained so that they perform to design specifications
throughout the life of the monitoring program.
d. The number, spacing, and depths of monitoring systems shall be:
(1) Determined
based upon site-specific technical information that shall include thorough
characterization of:
(a) Aquifer thickness,
groundwater flow rate, groundwater flow direction including seasonal and
temporal fluctuations in groundwater flow, and the information required by
Section258.17.; and,
(b) Saturated
and unsaturated geologic units and fill materials overlying the uppermost
aquifer, materials comprising the uppermost aquifer, and materials comprising
the confining unit defining the lower boundary of the uppermost aquifer;
including, but not limited to: thicknesses, stratigraphy, lithology, hydraulic
conductivities, porosities and effective porosities; and,
(2) Certified by a qualified professional and
approved by the Department. Within 14 days of this certification, the permittee
shall place the certification in the operating record and submit a copy to the
Department.
Disclaimer: These regulations may not be the most recent version. South Carolina may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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