Pennsylvania Code › Title 25 - ENVIRONMENTAL PROTECTION › Part I - Department of Environmental Protection › Subpart D - Environmental Health and Safety › Article IX - Residual Waste Management › Chapter 299 - STORAGE AND TRANSPORTATION OF RESIDUAL WASTE › Subchapter A - STANDARDS FOR STORAGE OF RESIDUAL WASTE › TYPES OF STORAGE CONTAINERS AND TANKS › Section 299.122 - Storage tanks

Current through Register Vol. 54, No. 28, July 13, 2024
(a) Residual
						  waste storage tanks shall meet the design and performance standards established
						  by this section. A storage tank shall be clearly labeled as "residual waste"
						  and the type of residual waste shall be identified.
(b) Aboveground residual waste storage tanks
						  shall be designed and operated as follows, unless an alternative design is
						  demonstrated to perform at a level equivalent to the requirements of this
						  section and is otherwise approved by the Department:
(1) Tanks shall be designed and constructed
						  in accordance with an appropriate current code of practice developed by
						  Nationally recognized associations such as UL, ACI, API, ASME, ASTM or
						  NACE.
(2) Tanks shall have a stable
						  foundation, capable of supporting the total weight of the tank when full of
						  waste without movement, rolling or unacceptable settling. The foundation shall
						  minimize corrosion of the tank bottom and meet or exceed the specifications of
						  the tank manufacturer. The foundation design and construction shall be based on
						  sound engineering practices.
(3)
						  Newly installed or repaired tanks shall be tested for tightness in accordance
						  with current codes of practice developed by Nationally recognized associations
						  and manufacturer's specifications. If a pneumatic test is used for manufactured
						  (shop built) tanks, the fittings, welds, joints and connections shall be coated
						  with a soap solution and checked for leaks. Deficiencies shall be remedied
						  prior to tanks being placed into service. Hydrostatic test fluids shall be
						  discharged or disposed of in accordance with State and Federal
						  requirements.
(4) Tank connections
						  through which waste can flow shall be equipped with an operating valve adjacent
						  to the tank to control flow of waste. Appropriate valves shall be installed to
						  meet or exceed current codes of practice and jurisdictional requirements.
						  Valves shall be designed, installed and maintained according to current codes
						  of practice.
(5) The exterior
						  surfaces of aboveground tanks and piping shall be protected by a suitable
						  coating, which prevents corrosion and deterioration. The coating system shall
						  be maintained throughout the entire operational life of the tank.
(6) Owners and operators shall ensure that
						  releases from overfills do not occur. Transfer of stored waste may not exceed
						  the volume available in receiving tank and the transfer shall be adequately
						  monitored. Immediate action shall be taken to stop the flow of waste prior to
						  exceeding tank capacity or in the event that an equipment failure
						  occurs.
(7) Tanks shall be
						  installed with the following:
(i) A gauge or
						  monitoring device which accurately indicates the level or volume in the tank
						  and is visible to the individual responsible for the transfer of waste. The
						  monitoring device shall be installed, calibrated and maintained in accordance
						  with manufacturer's specifications.
(ii) A high-level alarm and an automatic
						  high-level cut-off device or a high-level alarm and a manned operator shutdown
						  procedure in operation.
(8) Containment structures shall be
						  compatible with the wastes stored and minimize deterioration to the storage
						  tank system.
(9) Containment areas
						  shall be designed, maintained and constructed in accordance with sound
						  engineering practices adhering to Nationally recognized codes of practice, such
						  as NFPS, NACE, ACI or API and in compliance with State and Federal
						  requirements.
(10) Secondary
						  containment under the tank bottom and around underground piping shall be
						  designed to direct any release to a monitoring point.
(11) Permeability of the secondary
						  containment shall be less than 1 x 10-7 cm/sec at
						  anticipated hydrostatic head.
(12)
						  Aboveground tanks shall have emergency containment structures, such as dike
						  fields, curbing and containment collection systems, which contain releases from
						  overfills, leaks and spills.
(13)
						  Permeability of emergency containment structures shall be less than 1 x
						  10-6 cm/sec at anticipated hydrostatic head and be
						  of sufficient thickness to prevent the released waste from penetrating the
						  containment structure for a minimum of 72 hours and until the release can be
						  detected and recovered.
(14)
						  Emergency containment areas, such as dike fields, shall be able to contain 110%
						  of the capacity of the largest tank in the containment area.
(15) Stormwater shall be removed from the
						  emergency containment area as soon as possible or when the water is in contact
						  with the tank or piping and prior to the capacity of containment being reduced
						  by 10% or more. Manually operated pumps or siphons and manually operated
						  gravity drains may be used to empty the containment. If drain valves are used,
						  they shall be secured in the closed position when not in use. Discharge or
						  disposal of wastes from the containment structure shall comply with applicable
						  State and Federal requirements.
(16) Aboveground tank systems shall provide
						  method of leak detection capable of detecting a release. The leak detection
						  method shall be monitored at least monthly and shall be installed, calibrated,
						  operated and maintained in accordance with industry practices and
						  manufacturer's specifications.
(i) The area
						  beneath the tank bottom shall be monitored for leakage by visual, mechanical or
						  electronic leak detection methods.
(ii) Observation wells outside of the
						  secondary containment structure do not satisfy the leak detection
						  requirements.