Summary of fiscal years 1991 and 1992 construction, hydrologic, and geologic data obtained from the Maynardville Limestone exit pathway monitoring program

The Department of Energy (DOE) Oak Ridge Y-12 Plant contains several hazardous and nonhazardous waste sites and underground storage tank sites that have the potential for releasing hazardous and nonhazardous chemical constituents into local surface waters and groundwaters. To effectively evaluate groundwater and surface water contamination and contaminant migration from these sites, a Comprehensive Groundwater Monitoring Plan (Comprehensive Plan) was developed to guide monitoring of surface watrr and groundwater quality at the Y-12 Plant. This report describes the implementation of the Maynardville Limestone exit pathways project, which is a portion of the Comprehensive Plan (Maynardville Project). The Maynardville Limestone, which underhes the southern portion of Bear Creek Valley (BCV), is considered to be the primary pathway for groundwater leaving the Y-12 Plant boundaries. Hence, a monitoring well program was developed to construct new wells that would intersect and monitor important groundwater pathways.