Data Qualification Report: Water-Level Data From the Nye County Early Warning Drilling Program

Abstract

(QualiJcation of Unqualijied Data and the Documentation of Rationale for Accepted Data). The corroboration method (as defined in Attachment 2 of AP-SIII.2Q) was implemented to qual@ water-level data h m Nye County measurements obtained directly from the Nye County Nuclear Waste Repository Program Office (NWO).Comparison of United States Geological Survey (USGS) measurements contained in DTN GS9906083 123 12.003 with the Nye County water-level data has shown that the differences in water-level altitudes for the same wells are significantly less than 1 meter. This is an acceptable finding.Evaluation and recommendation criteria have been strictly applied to qualify Nye County measurements of water levels in selected wells measured by the USGS. However, the process of qualifying measured results by comboration also builds confidence that the Nye County method for measurement of water levels is adequate for the intended use of the data (which is regional modeling). Therefore, it is reasonable to extend the term of "qualified" to water-level measurements in the remaining Nye County Phase I wells on the basis that the method has been shown to produce adequate results for the intended purpose of supporting large-scale modeling activities for the Yucca Mountain Project OIMP).The Data Qualification Team recommends the Nye Comty, water-level data contained in Appendix D of this report be designated as "qualified." These data document manual measurements of water-levels in eight (8) EWDP Phase I drillholes (NC-EWDP-ID, NC-9S, and NC-EWDP-Washburn-lx) that were obtained prior to the field installation of continuous monitoring equipment.