On-Site Disposition of Concrete During Decommissioning and Decontamination: A Data Quality Objective-Based Approach

摘要

On-site disposition of concrete derived during decommissioning and demolition (D&D) of buildings at industrial sites is a cost-effective, waste minimization alternative to off-site disposal. Because the concrete is to be left on-site it becomes part of the solid matrix of the site and is subject to the compositional constraints governing site soils. In addition, the concrete and its contained-in materials may be subject to physical constraints such as size and shape which do not apply to soils. When considering on-site disposition of concrete, the data quality objective (DQO) process should be used to determine the compositional and physical constraints on the concrete and for developing the characterization approach to determine whether those constraints have been met. The information inputs to the compositional and physical constraints on the concrete constitute the concrete acceptance criteria (CAC) which become the basis for developing decision rules - the yeso statements that unequivocally state the compositional and physical conditions under which concrete may be left on site.An important DQO boundary concept is concrete classification. The cost of concrete characterization can be minimized with a thorough data gap assessment by focusing resources on the concrete most in need of characterization. Concrete for which a yeso decision can be made with reasonable certainty based on a comparison of existing data to the CAC receives a lesser amount of characterization scrutiny than does concrete for which existing data is non-existent or ambiguous relative to the CAC.