LAC 33:XI.907. Assessing the Site at Closure or Change-in-Service

A. Before permanent closure or a change-in-service is completed, owners and operators shall measure for the presence of a release where contamination is most likely to be present at the UST site, in accordance with the guidelines established by the department. In selecting sample types, sample locations, and measurement methods, owners and operators shall consider the method of closure, the nature of the stored substance, the type of backfill, the depth to groundwater, and other factors appropriate for identifying the presence of a release. Within 60 days following permanent closure or change-in-service, the UST owner shall submit the following to the Office of Environmental Assessment: 1. a completed underground storage tank closure/assessment form (UST-SURV-02); and 2. results of the closure assessment (e.g., closure assessment report). a. The assessment results (e.g., closure assessment report) shall include a site diagram indicating locations where samples were collected, laboratory analytical results table, laboratory analytical report and chain of custody, manifests, and conveyance notice if applicable, in accordance with the guidelines established by the department. B. If contaminated soils, contaminated groundwater, or free product as a liquid or vapor is discovered through the methods described in Subsection A of this Section, or in any other manner, owners and operators shall begin corrective action in accordance with LAC 33:XI.715.