Section 175.405  Spill Containment and Overfill Prevention Equipment


a)         To prevent spilling and overfilling associated with product transfer to the UST, owners or operators shall use the following spill containment and overfill prevention equipment:


1)         Both:


A)        Spill containment equipment that will prevent release of product to the environment when the transfer hose is detached from the fill pipe (e.g., a spill catch basin). As of May 1, 2003, new or replaced spill containment equipment must have a minimum 5 gallon capacity, except that a third party listed replacement containment designed by the manufacturer to be inserted into an existing spill containment will be allowed as long as it has a minimum capacity of 3.5 gallons.  Spill containment equipment shall be maintained in a dry, clean state; and


B)        Overfill prevention equipment that:


i)          Automatically shuts off flow into the tank when the tank is no more than 95% full; or


ii)         Alerts the transfer operator when the tank is no more than 90% full by restricting the flow into the tank or triggering an audible and visual high-product level alarm; or


2)         Provides alternative methods that are no less restrictive than subsections (a)(1) and (a)(2) and no less protective of human health or the environment, as approved in writing by OSFM.


b)         Owners and operators of UST systems with spill and overfill prevention equipment must meet the requirements of subsections (b) and (c) and shall ensure the equipment is operating properly and will prevent releases to the environment. Spill prevention equipment (such as a catchment basin, spill bucket, or other spill containment device) must prevent releases to the environment by meeting one of the following:


1)         The equipment is double-walled and the integrity of both walls is periodically monitored at a frequency not less than once every 30 days. Owners and operators must begin meeting the testing requirements of subsection (b)(2) and conduct a test within 30 days after discontinuing periodic monitoring of this equipment; or


2)         The spill prevention equipment is tested at installation, immediately after any repairs, and at least once every three years to ensure the equipment is liquid tight by using vacuum, pressure or liquid testing in accordance with one of the following criteria:


A)        Requirements developed by the manufacturer of the spill prevention equipment.  Owners and operators may use this option only if the manufacturer has developed requirements;


B)        Requirements developed by the manufacturer of the testing equipment; or


C)        A hydrostatic test that meets the requirements of Section 175.410(j).


c)         Overfill prevention equipment must be inspected at installation, immediately after any repairs, and at least once every three years, and the inspection shall meet the following criteria:


1)         At a minimum, the inspection must ensure that overfill prevention equipment is set to activate at the correct level specified in subsection (a);


2)         The overfill prevention equipment will activate when the regulated substance reaches that level; and


3)         Inspections must be conducted in accordance with inspection requirements developed by the manufacturer.


d)         Owners and operators must begin meeting the requirements for testing and inspection in subsections (b) and (c) as follows:


1)         For UST systems in use on or before October 13, 2015, the initial spill prevention equipment test and overfill prevention equipment inspection must be conducted not later than October 13, 2018.


2)         For UST systems brought into use after October 13, 2015, these requirements apply at installation.


e)         Owners and operators must maintain the following records for spill prevention equipment and overfill prevention equipment:


1)         All records of installation shall be maintained for the life of the equipment;


2)         All records of testing or inspection must be maintained for three years; and


3)         For spill prevention equipment not tested every three years, documentation showing that the prevention equipment is double-walled and the integrity of both walls is periodically monitored at a frequency not less than once every 30 days must be maintained for as long as the equipment is periodically monitored.


f)         Ball float vent valves for overfill prevention shall not be installed on new and existing UST systems after October 13, 2015. If an approved method of overfill prevention is not present on a UST when a ball float valve fails inspection, overfill prevention equipment meeting the requirements of this Section shall be installed.


g)         A UST that is filled by transfers of no more than 25 gallons at one time shall require spill containment but does not require overfill prevention.


h)         In addition to the requirements of this Section, waste oil tanks shall be equipped with spill containment devices at all fill and retrieval points. 


i)          All testing and inspections required by this Section shall be performed:


1)         By an OSFM-licensed contractor that has licensure in the installation/retrofitting or tank and piping tightness testing module; and


2)         Using an employee of an OSFM-licensed contractor for testing or inspection who is certified in the installation-retrofitting or tank and piping tightness testing module and also certified by the manufacturer of the equipment being tested or inspected and the testing equipment being utilized.


(Source:  Amended at 42 Ill. Reg. 10476, effective October 13, 2018)