North Carolina Administrative Code › Title 15A - Environmental Quality › Chapter 02 - Environmental Management › Subchapter T - WASTE NOT DISCHARGED TO SURFACE WATERS › Section .1500 - SOIL REMEDIATION › Section 02T .1505 - DESIGN CRITERIA

Current through Register Vol. 39, No. 2, July 15, 2024
(a) Land
				  Application of Soils Containing Petroleum Products at Minimum Rates.
				  Petroleum-contaminated soils shall be incorporated into the native soils of the
				  receiver site immediately upon application. Subsequent application of
				  petroleum-contaminated soils onto the same receiver site shall not occur for at
				  least 18 months from the date of the most recent application of
				  petroleum-contaminated soils and shall cause the receiver site to be
				  reclassified as a "dedicated site" unless the permittee or applicant can
				  demonstrate, through soil sampling and contaminant analytical procedures
				  pursuant to
				  15A NCAC
				  02H .0800, that the petroleum contaminant
				  level in the upper eight inches of the receiver site soils is below either the
				  soil-to-groundwater contaminant concentrations or the residential maximum soil
				  contaminant concentrations established by the Department pursuant to
				  15A NCAC
				  02L .0411, whichever is lower.
(b) Land Application of Soil Containing
				  Petroleum Products at Conventional Rates. Land application of soils containing
				  petroleum products at an application thickness greater than one inch shall
				  require fertilization, liming, and aeration of the mixture of native and
				  petroleum-contaminated soils. Application thickness shall be based upon the
				  nature of the receiver site soils, depth to the seasonal high water table, the
				  intended cover crop, and the source of contamination. Operation of the land
				  application program shall not result in contravention of groundwater or surface
				  water standards. Subsequent application of petroleum-contaminated soils onto
				  the same receiver site shall not occur for at least 18 months from the date of
				  the most recent application of petroleum-contaminated soils and shall cause the
				  receiver site to be reclassified as a "dedicated site" unless the permittee or
				  applicant can demonstrate, through soil sampling and contaminant analytical
				  procedures pursuant to
				  15A NCAC
				  02H .0800, that the petroleum contaminant
				  level in the upper eight inches of the receiver site soils is below either the
				  soil-to-groundwater contaminant concentrations or the residential maximum soil
				  contaminant concentrations established by the Department pursuant to
				  15A NCAC
				  02L .0411, whichever is lower.
(c) Disposal of Soils Containing Petroleum
				  Products at Dedicated Land Application Sites. Subsequent applications of
				  petroleum-contaminated soils at dedicated sites shall not recur until such time
				  as it can be demonstrated that additional applications of contaminated soils
				  will not result in the contravention of any groundwater or surface water
				  standards.
(d) Containment,
				  Treatment and Containment, and Use of Contaminated Soil.
(1) A containment structure designed to
				  bioremediate or volatilize contaminated soil shall be constructed of either a
				  synthetic liner of at least 30 mils thickness or of a one-foot-thick liner of
				  natural material compacted to at least 95 percent standard proctor dry density
				  and with a permeability of less than 1 x 10-7
				  cm/sec.
(2) The bottom of the
				  containment structure shall be at least three feet above the seasonal high
				  water table or bedrock.
(3) A
				  leachate collection system shall be installed in order to prevent runoff from
				  the contaminated soils within the containment structure, or a cover shall be
				  provided to avoid accumulation of stormwater within the containment
				  structure.
(4) The containment
				  structure shall be compatible with the chemical and physical properties of the
				  contaminants involved.