Rhode Island Code of Regulations › Title 250 - Department of Environmental Management › Chapter 140 - Waste and Materials Management › Subchapter 25 - Oil and Underground Tanks › Part 2 - Oil Pollution Control Regulations (250-RICR-140-25-2) › Section 250-RICR-140-25-2.10 - Aboveground Storage Tank Facilities

Current through June 14, 2024
A. Applicability;
				  This section applies to all AST facilities with a combined storage capacity of
				  over five hundred (500) gallons.
B.
				  Overfill Prevention
1. Responsibility for
				  transfer; The facility operator or owner, when on the premises and in control
				  of an oil transfer, shall be responsible for transfer activities. If the
				  facility operator or owner is not on the premises or not in control of an oil
				  transfer, the carrier (the person delivering the oil) will be responsible for
				  transfer activities. The operator or carrier must employ practices for
				  preventing transfer spills and accidental discharges. Prior to the transfer,
				  the operator or carrier must determine that the receiving AST has an available
				  capacity to receive the volume of oil to be transferred. The operator or
				  carrier must monitor every aspect of the delivery and take immediate action to
				  stop the flow of oil when the working capacity of the AST has been reached, or
				  should an equipment failure or emergency occur.
2. Shutoff valves for remote pumping units at
				  motor fuel dispensers; All dispensers of motor fuel under pressure from a
				  remote pumping system, must be equipped with a shear valve (impact valve)
				  located in the supply line at the inlet of the dispenser. This valve must be
				  designed to close automatically in the event that the dispenser is accidentally
				  dislodged from the inlet pipe. A valve meeting the standards set forth in NFPA
				  30A, § 6.3.9, incorporated above at §
											2.3(B) of
				  this Part meets the requirements of this subdivision.
3. Shutoff valves for gravity fed motor fuel
				  dispensers; All tanks which cause a gravity head on a dispenser of motor fuels
				  must be equipped with a device such as a solenoid valve which is positioned
				  adjacent to and downstream from the operating valve. The valve must be
				  installed and adjusted so that liquid cannot flow by gravity from the tank in
				  case of piping or dispenser hose failure. A valve meeting the standards set
				  forth in NFPA 30A, § 4.2.4, incorporated above at §
											2.3(B) of
				  this Part meets the requirements of this subdivision.
4. Gauges for ASTs;
a. All ASTs must be equipped with a gauge
				  that accurately shows the level of product in the tank. The gauge must be
				  accessible to the facility operator or oil carrier during transfer and easy to
				  read.
b. The design capacity,
				  working capacity, product type and identification number of the tank must be
				  clearly marked on the tank and at the gauge.
c. A high-level warning alarm (visible or
				  audible at the fill), a high-level liquid pump cutoff controller or equivalent
				  device may be used in lieu of the gauge required above.
5. Check valve for pump filled tanks; All
				  fill pipes leading to a pump filled oil tank must be equipped with a properly
				  functioning check valve, or equivalent device, to provide automatic protection
				  against backflow. A check valve is required only when the fill pipe arrangement
				  poses a risk for backflow.
6.
				  Operating valves for gravity drained tanks; Each tank connection through which
				  oil can normally flow must be equipped with an operating valve to control flow.
				  A valve which meets the standards set forth in NFPA 30, § 22.13.1,
				  incorporated above at §
											2.3(A) of
				  this Part meets the requirements of this paragraph.