7 Del. Admin. Code § 7103-149.0

Current through Register Vol. 28, No. 4, October 1, 2024

Section 7103-149.0 - Permanent Storage Facilities

Permanent storage facilities shall be designed and constructed in accordance with all the requirements listed for temporary storage facilities in these regulations with the following additions:

149.1 The facility shall be lined to prevent loss of materials to ground waters. Acceptable liners shall include:

149.1.1 1-foot thick clay or other suitable material with an installed permeability of 1.0 x 10^-7 cm/sec. or less;

149.1.2 2-foot thick clay or other suitable material with an installed permeability of 1.0 x 10^-6 cm/sec or less;

149.1.3 2-foot thick compacted soil with an installed permeability of 1.0 x 10^-5 cm/sec. or less in combination with an artificial liner at least 30 mil in thickness with a permeability of 1.0 x 10^-7 cm/sec. or less; or

149.1.4 Other manufactured facilities including but not limited to asphalt or reinforced concrete structures, steel tanks, fiberglass tanks, or their equivalent.

149.2 A ground water monitoring program shall be conducted in accordance with a plan approved by the Department. At a minimum, three wells, one upgradient and two downgradient of the facility, shall be installed. The Department may waive this provision for facilities which store sludge in above ground manufactured facilities such as tanks or similar structures.

149.3 The Department may approve the storing or stockpiling of dried sludge on a storage pad without groundwater monitoring if the pad meets the Department's standards for permanent storage facility liners and all runoff from the pad is collected and disposed of in a manner approved by the Department.

149.4 Other methods of storing or stockpiling dried sludge may be approved by the Department if the Department determines that they do not have significant potential to cause nuisances or adversely affect the public health or the environment.

149.5 If the facility is constructed after the date when these regulations are adopted by the Department a 1,000 foot buffer zone shall be maintained between the sludge processing or storage area, or both, and the nearest inhabited off-site dwelling. This buffer distance may be reduced if the Department considers that the facility has adequate specific conditions to control odors and potential nuisances.

7 Del. Admin. Code § 7103-149.0