Comprehensive monitoring report for underground storage Tank 0134-U at Building 9204-2

The purpose of this document is to present potentiometric, groundwater quality, and vapor monitoring data required for Comprehensive Monitoring of underground storage tank (UST) 0134-U at the Oak Ridge Y-12 Plant Building 9204-2 Site. Comprehensive monitoring has been conducted at the site as part of a Monitoring Only program approved by the Tennessee Department of Environment and Conservation (TDEC) based on review and approval of Site Ranking (Site Ranking Form approved March 9, 1995). Site Status Monitoring will be conducted semiannually. Comprehensive monitoring and preparation of this report have been conducted in accordance with the requirements of TDEC Rule 1200-1-15 and the TDEC UST Reference Handbook, Second Edition (TDEC 1994) Technical Guidance Document (TGD) 007. In addition, soil and groundwater sampling results that were used to support site ranking are included as part of this report. This document is organized into four sections. Section 1 presents introductory information relative to the site including the regulatory initiative and a site description. Section 2 includes the results of water level measurements and sampling of monitoring wells GW-204, GW-656, GW-805, GW-806, and GW-807. Section 3 presents data from vapor monitoring conducted subsurface utilities present at the site. Section 4 presents the results of soil sampling perform in support of site ranking