D.C. Mun. Regs. tit. 20, § 6012
Other Methods of Release Detection
Effective Feb 21, 202067 DCR 1778Authority: Section 107 of the District Department of the Environment Establishment Act of 2005, effective February 15, 2006 (D.C. Law 16-51; D.C. Official Code § 8-151.07 (2013 Repl. & 2019 Supp.)); the 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. (2013 Repl.)); Sections 11 and 21 of the Water Pollution Control Act of 1984, effective March 16, 1985 (D.C. Law 5-188; D.C. Official Code §§ 8-103.10 & 8-103.20 (2013 Repl.)); and Mayor's Order 2006-61, dated June 14, 2006. Source: Final Rulemaking published at 40 DCR 7835, 7876 (November 12, 1993); as amended by Final Rulemaking published at 46 DCR 7699 (October 1, 1999); as amended by Final Rulemaking published at 67 DCR 1778 (February 21, 2020).District of Columbia, Office of the Secretary
6012 STATISTICAL INVENTORY RECONCILIATION
6012.1 A release detection method based on the application of statistical principles to inventory data similar to those described in § 6005 shall meet the requirements of this section.
6012.2 Statistical inventory reconciliation shall be conducted monthly and shall:
- (a) Report a quantitative result with a calculated leak rate;
- (b) Be capable of detecting a leak rate of two tenths of a gallon per hour (0.2 gal/hr) or a release of one hundred fifty (150) gallons within thirty (30) days; and
- (c) Use a threshold for declaring a leak that does not exceed one half of the minimum detectable leak rate.
6012.3 An owner or operator using statistical inventory reconciliation shall verify the accuracy of the selected statistical inventory reconciliation method using a separate test procedure to confirm that the method can detect leaks at the required level in accordance with § 6012.2 and with the probabilities of detection and false alarm required in § 6000.9.
6012.4 An owner or operator using statistical inventory reconciliation shall ensure that the accuracy of the selected method has been evaluated and verified through independent third party certification and shall maintain these evaluation records for a period of ten (10) years.
SOURCE: Final Rulemaking published at 40 DCR 7835 (November 12, 1993); as amended by Final Rulemaking published at 46 DCR 7699 (October 1, 1999); as amended by Final Rulemaking published at 67 DCR 1778 (February 21, 2020).