California Code of Regulations › Title 23 - Waters › Division 3 - State Water Resources Control Board and Regional Water Quality Control Boards › Chapter 16 - Underground Tank Regulations › Article 3 - New Underground Storage Tank Design, Construction, and Monitoring Requirements › Section 2633 - Alternate Construction Requirements for New Underground Storage Tanks Containing Motor Vehicle Fuel

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
				  This section sets forth alternate construction requirements for new underground
				  storage tanks which contain only motor vehicle fuels. Owners or operators of
				  new underground storage tanks which contain only motor vehicle fuels may comply
				  with this section in lieu of section
				  2631. If the tanks are constructed
				  in accordance with the requirements of this section, they shall be monitored in
				  accordance with section
				  2634.
(b) Underground storage tanks used for
				  storage of motor vehicle fuel and constructed in accordance with this section
				  shall be composed of fiberglass-reinforced plastic, cathodically protected
				  steel, or steel clad with fiberglass-reinforced plastic. These tanks shall be
				  installed with the leak interception and detection system constructed in
				  accordance with the requirements of subsections (d) through (f). The primary
				  containment system shall meet the requirements of sections
				  2631(b) and
				  2631(c).
(c) Underground storage tanks used for
				  storage of motor vehicle fuel that are constructed of materials other than
				  those specified in subsection (b) shall be constructed in accordance with
				  section 2631 and monitored in accordance
				  with section
				  2631 and monitored in accordance
				  with section
				  2632.
(d) The floor of a leak interception and
				  detection system shall be constructed on a firm base and sloped to a collection
				  sump. Methods of construction for a leak interception and detection system
				  using membrane liners shall comply with the requirement of section
				  2631(d)(6).
(e) Access casings shall be installed in the
				  collection sump of a secondary containment system which has backfill in the
				  interstitial space. The access casing shall be:
(1) Designed and installed to allow the
				  liquid to flow into the casing;
(2)
				  Sized to allow efficient removal of collected liquid and to withstand all
				  anticipated applied stresses using appropriate engineering safety
				  factors;
(3) Constructed of
				  materials that will not be structurally weakened by the stored hazardous
				  substances or donate, capture, or mask constituents for which analyses will be
				  made;
(4) Screened along the entire
				  vertical zone of permeable material which may be installed between the primary
				  container and the leak interception and detection system;
(5) Capable of preventing leakage of any
				  hazardous substance from the casing to areas outside the leak interception and
				  detection system;
(6) Extended to
				  the ground surface and covered with a locked waterproof cap or enclosed in a
				  secured surface structure that will protect the access casing(s) from entry of
				  surface water, accidental damage, unauthorized access, and vandalism. A
				  facility with locked gates will satisfy the requirements for protection against
				  unauthorized access and vandalism; and
(7) Capable of meeting requirements of local
				  well-permitting agencies.