D.C. Mun. Regs. tit. 20, § 6210
No Further Action and Case Closure Requirements
Authority: 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, 7896 (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
6210 UPPER CONCENTRATION LIMITS FOR GROUNDWATER
6210.1 The Upper Concentration Limits (UCL) for benzene in ground water at a site contaminated by an underground storage tank shall be fifteen parts per million (15 ppm) or 15,000 parts per billion (15,000 ppb).
6210.2 The Director shall establish UCLs for other chemicals of concern in ground water.
SOURCE: Final Rulemaking published at 40 DCR 7835, 7896 (November 12, 1993); as amended by Final Rulemaking published at 46 DCR 7699 (October 1, 1999).