1. A. Before applying for an extension for temporary closure or completing a permanent closure or change-in-service of a UST system, an owner and an operator of a UST system shall:

   1. (1) Perform a site assessment to determine if there is evidence of a spill, release, or discharge where contamination would most likely be present; and

   2. (2) In selecting sample types, sample locations, and measurement methods consider:

      1. (a) The method of closure;
      2. (b) The nature of the stored regulated substance;
      3. (c) The type of backfill;
      4. (d) The depth to groundwater; and
      5. (e) Other factors appropriate for identifying the presence of a spill, release, or discharge.

2. B. If contaminated soil, contaminated groundwater, free product, or vapor is discovered while performing the actions under §A of this regulation or by any other manner during a UST system closure or change-in-service activities, an owner, an operator, and a person in charge of a UST system shall:

   1. (1) Notify the Department within 2 hours of the discovery, as required in COMAR 26.10.08; and
   2. (2) Begin performing the response and corrective actions required in COMAR 26.10.09.

Authority: Environment Article, §§4-402, 4-405, 4-407, 4-408, 4-410, 4-411, 4-411.1, 4-417, and 7-201 et seq., Annotated Code of Maryland

Effective date: February 4, 1991 (18:2 Md. R. 151)

Chapter revised effective November 4, 1996 (23:22 Md. R. 1498)

Regulation .01D amended effective June 29, 1998 (25:13 Md. R. 997)

Regulation .02F amended effective June 29, 1998 (25:13 Md. R. 997)

Regulations .01—.05 repealed and new Regulations .01—.05 adopted effective June 13, 2022 (49:12 Md. R. 642)