D.C. Mun. Regs. tit. 20, r. 20-5705

Current through Register Vol. 72, No. 2, January 10, 2025

Rule 20-5705 - SPILL AND OVERFILL PREVENTION EQUIPMENT FOR NEW AND UPGRADED UST SYSTEMS

5705.1

Except as provided in § 5705.3, in order to prevent spilling during the transfer of regulated substances to an UST, each owner or operator shall use spill prevention equipment (such as a spill catchment basin) that will prevent release of regulated substances when the transfer hose is detached from the fill pipe.

5705.2

Each owner or operator of a new or upgraded UST system shall prevent spills and overfills by ensuring that the space in the tank is sufficient to receive the volume of regulated substances to be transferred and that the transfer operation is constantly monitored in accordance with § 5900.3.

5705.3

Except as provided in §§ 5705.4 through 5705.6, in order to prevent overfilling during the transfer of regulated substances, each owner or operator shall use overfill prevention equipment that does one or more of the following:

(a) Automatically shuts off flow into the tank when the tank is no more than ninety- five percent (95%) full;

(b) Alerts the transfer operator when the tank is no more than ninety percent (90%) full by triggering a high- level audible and visible alarm that is labeled overfill alarm and is in full view of the delivery driver;

(c) Restricts flow thirty (30) minutes prior to overfilling;

(d) Alerts the transfer operator with a high level alarm one (1) minute before overfilling; or

(e) Automatically shuts off flow into the tank so that none of the fittings located on the top of the tank are exposed to product due to overfilling.

5705.4

No owner or operator shall use flow restrictors (ball float systems) in vent lines as the only method of overfill prevention when the overfill prevention is installed or replaced after February 21, 2020.

5705.5

Tanks that are susceptible to over-pressurization shall only use an automatic shutoff valve to comply with § 5705.3.

5705.6

An owner or operator is not required to provide and use the spill and overfill prevention equipment specified in this section if:

(a) Alternative equipment is used that is determined by the Department, in accordance with § 5500.5, to be no less protective of human health and the environment than the equipment specified in the other provisions of this section; or

(b) The UST is filled by transfers of no more than twenty- five (25) gallons at one time.

5705.7

The spill prevention equipment on new USTs shall have a minimum capacity of ten (10) gallons.

D.C. Mun. Regs. tit. 20, r. 20-5705

Final Rulemaking published at 40 DCR 7835, 7858 (November 12, 1993); as amended by Final Rulemaking published at 46 DCR 7699 (October 1, 1999); as amended by Erratum Notice published at 53 DCR 3759 (May 5, 2006); as amended by Final Rulemaking published at 56 DCR 6678 (August 21, 2009); amended by Final Rulemaking published at 67 DCR 1778 (2/21/2020)

Although Final Rulemaking published at 56 DCR 6678 (August 21, 2009) purports to amend subsection 5705.2, the text is identical to that of the Erratum Notice published at 53 DCR 3759 (May 5, 2006).

Authority: District of Columbia Underground Storage Tank Management Act of 1990, effective March 8, 1991, D.C. Law 8-242, D.C. Official Code, § 8-113.01 et seq. (2008 Repl.), as amended, and Mayor's Order 2006-61, dated June 14, 2006