Remediation System Evaluation: Reilly Tar and Chemical Corp. (Indianapolis Plant) Site, A.K.A. 'Reilly Industries' Site, Indianapolis, Indiana

摘要

A Remediation System Evaluation (RSE) involves a team of expert hydrogeologists and engineers, independent of the site, conducting a third-party evaluation of site operations. It is a broad evaluation that considers the goals of the remedy, site conceptual model, above-ground and subsurface performance, and site exit strategy. The evaluation includes reviewing site documents, visiting the site for up to 1.5 days, and compiling a report that includes recommendations to improve the system. The Reilly Industries site is an active chemical manufacturing facility surrounded by a mix of residential, industrial and commercial properties. All residences in the area of contaminated ground water have been connected to the municipal water supply. This RSE report is focused on the operating pump-and-discharge (P&D) system, and the related monitored natural attenuation (MNA) of off-site ground water. A two-well perimeter ground water extraction system began operation in October 1994. Extraction wells have been added/replaced in several increments since that time. The current P&D system contains five extraction wells, operating at a combined rate of approximately 220 gpm.