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D.C. Municipal Regulations (Last Updated: September 13, 2017) |
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Title 20. ENVIRONMENT |
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Chapter 20-62. UNDERGROUND STORAGE TANKS - REPORTING OF RELEASES, INVESTIGATION, CONFIRMATION, ASSESSMENT AND CORRECTIVE ACTION |
Section 20-6204. REMOVAL OF FREE PRODUCT
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6204.1At sites where investigations under § 6203.12 indicate the presence of any free product, the responsible party shall remove measurable free product to the maximum extent practicable as determined by the Director, in accordance with a schedule determined or approved by the Director on a case by-case basis, while continuing, as necessary, any actions initiated under §§ 6203 through 6205, or preparing for actions required under § 6206. Fulfillment of the requirements of this section is a pre-requisite to the use of risk-based decisionmaking to develop a risk-based corrective action (RBCA) plan pursuant to § 6206.
6204.2The responsible party shall conduct the removal of free product in a manner that minimizes the spread of contamination into previously uncontaminated zones by using recovery techniques appropriate to the hydrogeologic conditions at the site.
6204.3The responsible party shall conduct the recovery and disposal of free product in a manner that properly treats, discharges, recycles or disposes of recovery byproducts in compliance with all applicable laws and regulations.
6204.4The minimum objective for the design of the free product removal system shall be the abatement of free product migration.
6204.5The responsible party shall ensure that any flammable substances are handled in a manner that will prevent fire and explosion.
6204.6Unless directed to do otherwise by the Director, the responsible party shall prepare and submit to the Director, commencing forty-five (45) days after release confirmation and quarterly thereafter, a status report on the removal of any free product, in the format prescribed by the Director, that provides at least the following information:
(a)The name of the person(s) responsible for implementing the free product removal measures;
(b)The estimated quantity, type, and thickness of free product observed or measured in wells, boreholes, and excavations;
(c)The type of free product recovery system used;
(d)Whether any groundwater discharge will take place on-site or off-site during the recovery operation and where this discharge point will be located;
(e)The type of treatment applied to, and the effluent quality expected from, any such discharge;
(f)The steps that have been or are being taken to obtain necessary permits for any discharge; and
(g)The disposition of the recovered free product.