Sec. 26.10.10.03. Assessing the Site at Closure or Change-in-Service

A. Before permanent closure or a change-in-service is completed:

(1) Owners and operators shall determine if there is evidence of a release where contamination would most likely be present at the UST site;

(2) In selecting sample types, sample locations, and measurement methods, owners and operators shall consider:

(a) The method of closure,

(b) The nature of the stored substance,

(c) The type of backfill,

(d) The depth to ground water, and

(e) Other factors appropriate for identifying the presence of a release.

B. The requirements of §A of this regulation are satisfied if one of the external release detection methods allowed in COMAR 26.10.05 is operating in accordance with the requirements in that chapter at the time of closure, and indicates no release has occurred.

C. If contaminated soils, contaminated ground water, or free product as liquid or vapor is discovered under §A or B of this regulation or by any other manner, owners and operators shall begin corrective action in accordance with COMAR 26.10.09.