1. A. An owner of an existing gasoline UST system in a HRGUA, except for an existing gasoline UST system located in Anne Arundel County, shall:

   1. (1) Not later than July 25, 2005, implement the following release detection methods:

      1. (a) Sample each site supply well and any existing groundwater monitoring wells located on the oil storage facility;

      2. (b) Install a minimum of three groundwater monitoring wells that are:

         1. (i) Constructed in accordance with COMAR 26.04.04 and Department specifications;
         2. (ii) Outside of the excavation zone;
         3. (iii) In locations that will allow for the determination of groundwater flow; and
         4. (iv) Placed in areas that are most likely to detect a spill, release, or discharge from the UST system;
      3. (c) Sample each groundwater monitoring well installed pursuant to §A(1)(b) of this regulation; and
      4. (d) Analyze each water sample collected pursuant to §A(1)(a) and (c) of this regulation in accordance with Regulation .05 of this chapter;
   2. (2) On an annual basis, collect and analyze water samples from each site supply well and groundwater monitoring well in accordance with §A(1)(a), (c) and (d) of this regulation;

   3. (3) Within 60 days after conducting a sample collection pursuant to §A(1) or (2) of this regulation, submit the following documents to the Department:

      1. (a) A complete laboratory report that includes a copy of the laboratory sample acceptance form, sample chain-of-custody, and laboratory analytical results; and
      2. (b) A site map identifying each site supply well and groundwater monitoring well located on the oil storage facility; and

   4. (4) Except for a UST system with Stage II piping decommissioned using a method approved by the Department, not later than January 26, 2006, and on a 24-month basis thereafter, test the UST system in accordance with the following procedures:

      1. (a) Test all primary piping that does not contain liquid gasoline, tank top fittings, Stage II piping, riser pipes, and vent piping using a helium pressure test, or other test approved by the Department, in accordance with procedures prescribed by the Department;
      2. (b) If leaks or deficiencies are found during the testing, make necessary repairs in accordance with COMAR 26.10.04.04; and
      3. (c) Upon completion of a repair, retest the UST system in accordance with §A(4)(a) of this regulation to ensure the UST system does not leak.

2. B. An owner of an existing gasoline UST system in a WHPA shall:

   1. (1) Not later than January 1, 2010, implement the following release detection methods:

      1. (a) Sample any existing groundwater monitoring well, and if present, site supply well located on the oil storage facility;

      2. (b) Install a minimum of three groundwater monitoring wells that are:

         1. (i) Constructed in accordance with COMAR 26.04.04 and Department specifications;
         2. (ii) Outside of the excavation zone;
         3. (iii) In locations that will allow for the determination of groundwater flow; and
         4. (iv) Placed in areas that are most likely to detect a spill, release, or discharge from the UST system;
      3. (c) Sample each groundwater monitoring well installed pursuant to §B(1)(b) of this regulation; and
      4. (d) Analyze each water sample collected pursuant to §B(1)(a) and (c) of this regulation in accordance with Regulation .05 of this chapter;
   2. (2) On an annual basis, collect and analyze water samples from each groundwater monitoring well, and if present, site supply well in accordance with §B(1)(a), (c) and (d) of this regulation;

   3. (3) Within 60 days after conducting a sample collection pursuant to §B(1) or (2) of this regulation, submit the following documents to the Department:

      1. (a) A complete laboratory report that includes a copy of the laboratory sample acceptance form, sample chain-of-custody, and laboratory analytical results; and
      2. (b) A site map identifying each groundwater monitoring well, and if present, site supply well located on the oil storage facility; and

   4. (4) Except for a UST system with Stage II piping decommissioned using a method approved by the Department, not later than January 1, 2010, and on a 24-month basis thereafter test the UST system in accordance with the following procedures:

      1. (a) Test all primary piping that does not contain liquid gasoline, tank top fittings, Stage II piping, riser pipes, and vent piping using a helium pressure test, or other test approved by the Department, in accordance with procedures prescribed by the Department;
      2. (b) If leaks or deficiencies are found during the testing, make necessary repairs in accordance with COMAR 26.10.04.04; and
      3. (c) Upon completion of a repair, retest the UST system in accordance with §B(4)(a) of this regulation to ensure the UST system does not leak.

Authority: Environment Article, §§4-401, 4-402, 4-405, 4-407—4-411.2, 4-415.1, 4-417, and 4-701 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 .01 repealed and new Regulations .01—.08 adopted effective June 13, 2022 (49:12 Md. R. 642)