North Dakota Administrative Code › Title 33.1 - Department of Environmental Quality › Article 33.1-20 - SOLID WASTE MANAGEMENT AND LAND PROTECTION › Chapter 33.1-20-13 - Water Protection Provisions › Section 33.1-20-13-02 - Ground water quality monitoring

Current through Supplement No. 393, July, 2024
1.
				An owner or operator of a resource recovery unit, a land treatment unit, a
				surface impoundment, or a landfill, except an inert waste landfill, must
				incorporate a ground water monitoring system into the design of the facility.
				An owner or operator of a CCR unit that is subject to the provisions of chapter
				33.1-20-08 is exempt from the requirements of this section. If the owner or
				operator demonstrates to the department that there is no potential for
				migration of solid waste constituents to the uppermost aquifer during the life
				of the solid waste management unit and the postclosure period, the department
				may suspend this requirement. The demonstration must be based upon factors such
				as the site characterization, the solid waste characteristics and constituents,
				the potential capacity of the unit or facility, and the physical, chemical, and
				biological processes affecting contaminant fate and transport.
2. Ground water monitoring systems must be
				designed to effectively detect the migration of contamination. At a minimum, a
				water quality monitoring system shall:
a.
				Include one ground water monitoring well located upgradient of the solid waste
				management unit, and at least two wells located downgradient of the unit. The
				monitoring wells should be installed at appropriate locations and depths to
				yield ground water from the uppermost aquifer and all hydraulically connected
				aquifers below the solid waste management units on the facility;
b. Represent the elevation of ground water in
				each well immediately prior to purging so that the owner or operator may
				determine the rate and direction of ground water flow each time ground water is
				sampled;
c. Represent the quality
				of ground water that has not been affected by spills or leakage from solid
				waste management units;
d.
				Represent the quality of ground water to ensure detection of contamination
				passing the compliance boundary;
e.
				Ground water samples at municipal waste landfills must not be filtered prior to
				analysis; and
f. The frequency and
				number of samples collected must be consistent with statistical procedures for
				evaluating ground water data. A minimum of four independent samples from each
				well must be collected for analysis during the first sampling event for
				establishing background data at upgradient (subdivision c) and downgradient
				(subdivision d) wells, unless four or more sampling events occur prior to
				acceptance of solid waste by the facility. The monitoring frequency must be
				semiannual during the active life of the facility and during the postclosure
				period. The department may specify an alternate frequency for sampling based
				upon such factors as site hydrogeological characteristics, solid waste
				characteristics, evidence of a spill or leakage, or resource value of the
				aquifer.