- (a) Applicability. This section applies to new permits and expansions of the permitted boundaries of all Class 4 landfills and Class 3 landfills disposing only Class 4 waste as established under 8 CAR § 60-1102.
(b) General ground water separation requirements. Applicants shall demonstrate that:
- (1) The top of any bottom liner system will be located five feet (5’) above the seasonal high water table surface, and within a soil or geologic unit with an in situ hydraulic conductivity of 1 x 10-5 cm/sec or less; or
- (2) An appropriate containment structure has been provided in accordance with 8 CAR § 60-621(c).
(c) Yard waste facilities ground water separation. Applicants for composting facilities that compost only yard, paper, and wood waste shall demonstrate that:
- (1) The containment structures will be located two feet (2’) above the seasonal high water table surface and within a soil or geologic unit with an in situ hydraulic conductivity of 1 x 10-5 cm/sec or less; or
- (2) An appropriate containment structure has been provided.
- (d) Bedrock separation. Including consideration of any liner system that may be provided in the facility design, waste shall not be placed within two feet (2’) of the bedrock surface.
(e) Site characterization. The following site characterization information must be obtained:
(1)
- (A) Test pits and/or borings must be used to demonstrate the depth and site stratigraphy to a depth of no less than ten feet (10’) below the bottom of the containment structure.
- (B) The excavations (i.e., test pits, borings, etc.) shall be at a minimum spacing of one (1) per five (5) acres; and
(2)
- (A) Representative samples of each distinct soil textural unit must be collected and characterized with the following tests:
(i) Sieve analysis (ASTM D-1140 and D-422); and
(ii) Atterberg Limits (ASTM D-4318).
- (B) Soil hydraulic conductivity tests shall be determined using undisturbed soil samples or an in situ test utilizing an acceptable methodology.