Underground Storage Tank Case Studies

Downtown Property Re-Development UST

During redevelopment of a downtown property, an underground storage tank (UST) was discovered during demolition. The UST, which was overlooked in previous investigations, previously contained waste oil. Due to the presence of chemicals of concern not addressed in BUSTR regulations (including Dichlorobenzene and Bis-(2-Chloroethoxy)-methane), BUSTR requested an evaluation of risk for these COCs as a condition for closure.

Brownfield Management Services (BMS LLC) was retained by the developer to conduct a risk assessment to ensure that soils remaining in the excavation were below applicable risk-based or generic numeric values. These site-specific "action levels” were evaluated for each COC and for each potential pathway, using the approach identified in BUSTR Chapter 13 regulations. Future use of the site was also considered as part of this effort.

Results of the risk assessment indicated all compounds were below action levels for the site, based on non-residential future use scenario.

Divestiture of Bulk Hydrocarbon Terminal Facilities – Ohio

As part of a facilities divestiture program, Mr. Hackett conducted an evaluation of USTs and ASTs at an Ohio Bulk Fuel facility. Key activities included Site Conceptual Model, incorporating portions of Ohio Revised Code - 3745-300 specifications, (Ohio’s Voluntary Action {Brownfields} Program), which was used to establish an initial potential exposure evaluation.

Follow-up Phase II subsurface investigations revealed the most common sources of soil and groundwater impacts at these facilities involved historic spills from ASTs and associated above ground distribution systems, and discharges from USTs. Corrective action activities required interaction with Ohio VAP and Bureau of Underground Storage Tank Regulations (BUSTR) agency personnel. Completion and closure of UST-related issues was required prior to closure of these sites through Ohio VAP program.