Statutes, codes, and regulations
District Of Columbia Administrative Code
Title 20 - ENVIRONMENT
Chapter 20-60 - UNDERGROUND STORAGE TANKS - RELEASE DETECTION
Rule 20-6008 - AUTOMATIC TANK GAUGING

D.C. Mun. Regs. tit. 20, r. 20-6008

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Current through Register Vol. 72, No. 2, January 10, 2025
Rule 20-6008 - AUTOMATIC TANK GAUGING
6008.1

A release detection method using automatic tank gauging equipment that tests for the loss of product and conducts inventory control shall meet the requirements of this section.

6008.2

The owner or operator shall ensure that the tank gauging probe is installed as close as possible to the middle of the tank and is not located adjacent to the fill pipe or submersible pump.

6008.3

An automatic product level monitor test shall be capable of detecting a leak rate of two tenths of a gallon per hour (0.2 gal/hr) from any portion of the tank that routinely contains a regulated substance.

6008.4

A tank installed after November 12, 1993, shall be installed horizontally without tank tilt if automatic tank gauging is used as a method of release detection.

6008.5

The automatic tank gauging system shall be inspected at least every thirty (30) days to ensure that it is operating correctly.

6008.6

The automatic tank gauging equipment shall meet the inventory control requirements of § 6005.3.

6008.7

The owner or operator shall perform the test for loss of product with the system operating in one of the following modes:

(a) In-tank static testing conducted at least once every thirty (30) days; or
(b) Continuous in-tank leak detection operating on an uninterrupted basis or alternatively, operating within a process that allows the system to gather incremental measurements to determine the leak status of the tank at least once every thirty (30) days.
6008.8

An owner or operator of an UST system installed after February 8, 2007, may use automatic tank gauging as a release detection method only if secondary containment and interstitial monitoring methods are also used.

D.C. Mun. Regs. tit. 20, r. 20-6008

Final Rulemaking published at 40 DCR 7835, 78673 (November 12, 1993); as amended by Final Rulemaking published at 46 DCR 7699 (October 1, 1999); amended by Final Rulemaking published at 67 DCR 1778 (2/21/2020)