Pennsylvania Code › Title 25 - ENVIRONMENTAL PROTECTION › Part I - Department of Environmental Protection › Subpart D - Environmental Health and Safety › Article VI - General Health and Safety › Chapter 245 - ADMINISTRATION OF THE STORAGE TANK AND SPILL PREVENTION PROGRAM › Subchapter F - TECHNICAL STANDARDS FOR ABOVEGROUND STORAGE TANKS AND FACILITIES › RELEASE PREVENTION AND LEAK DETECTION › Section 245.542 - Containment requirements for above-ground storage tank systems

Current through Register Vol. 54, No. 28, July 13, 2024
(a) Containment
						  structures must be compatible with the substance stored and minimize
						  deterioration to the aboveground storage tank system.
(b) Containment areas shall be designed,
						  maintained and constructed in accordance with sound engineering practices
						  adhering to Nationally recognized codes of practice and in compliance with
						  State and Federal requirements.
(c)
						  Secondary containment under the aboveground storage tank bottom and around
						  underground piping must be designed to direct any release to a monitoring point
						  to meet leak detection requirements. Secondary containment shall be provided on
						  a new tank at installation, and shall be provided on an existing tank at
						  reconstruction or relocation of the tank or when the tank floor is replaced
						  (See API 650 Appendix I). Permeability of the secondary containment must be
						  less than 1 x 10-7 cm/sec at anticipated hydrostatic
						  head and shall be verified at the time of installation.
(d) Aboveground storage tanks must have
						  emergency containment structures, such as dike fields, curbing and containment
						  collection systems, which contain releases from overfills, leaks and spills.
(1) Permeability of newly installed or
						  replacement emergency containment structures or emergency containment
						  structures for aboveground storage tanks installed after October 11, 1997, must
						  be less than 1 x 10-6 cm/sec at anticipated
						  hydrostatic head and be of sufficient thickness to prevent the released
						  substance from penetrating the containment structure for a minimum of 72 hours,
						  and until the release can be detected and recovered.
(2) Emergency containment structures for
						  aboveground storage tanks installed on or before October 11, 1997, must meet
						  one of the following standards:
(i) The
						  standards for new emergency containment structures for aboveground storage
						  tanks in paragraph (1).
(ii)
						  Verification by a professional engineer that the emergency containment
						  structure, coupled with the tank monitoring program and response plan, is
						  capable of detecting and recovering a release and is designed to prevent
						  contamination of the waters of this Commonwealth. Verification may be conducted
						  in a manner consistent with the Department's technical document entitled
						  "Verification of Emergency Containment Structures for Aboveground Storage
						  Tanks" or in a manner at least as protective of public health and safety and
						  the environment and which meets all statutory and regulatory requirements.
						  Verification of earthen structures should include determination of the
						  containment structure permeability following Nationally recognized testing
						  methods.
(3) Verification
						  of the containment structure is valid until conditions at the site, monitoring
						  program, response plan or procedures change.
(4) Transfers of regulated substances to an
						  aboveground storage tank within the emergency containment shall be monitored by
						  designated personnel for the duration of the transfer.