This report details the activities performed under Task 35 of the University and Community College System of Nevada (UCCSN) Cooperative Agreement with the US Department of Energy (DOE). Task 35, titled "Chemical Analyses for Alcove 8 / Niche 3 Tracer Studies", provided for the development of analytical procedures and the analysis of samples from the first phase of tracer testing at Alcove 8 / Niche 3 in the Exploratory Studies Facility (ESF). Two conservative tracers (bromide and pentafluorobenzoic acid) and three FD&C dye tracers (FD&C Blue #1, FD&C Yellow #5, and FD&C Red #40) were analyzed in the seepage samples collected from Niche 3. Several background constituents (chloride, phosphate, sulfate, nitrate, magnesium, potassium, sodium, and calcium) were analyzed in a subset of the collected seepage samples. Samples were collected by Lawrence Berkeley National Laboratories (LBNL) and / or the US Geological Survey (USGS) researchers and transferred using chain of custody to the Harry Reid Center for Environmental Studies (FTRC). Samples were then analyzed using high performance liquid chromatography (HPLC) for pentafluorobenzoic acid (PFBA) and FD&C dyes, ion chromatography for bromide, chloride, phosphate, sulfate, nitrate, and atomic absorbance spectroscopy for magnesium, potassium, sodium, and calcium. Implementing procedures (IPLVs), approved by the UCCSN Quality Assurance Program, were followed for all aspects of sample control, sample analysis, and data reporting. In addition, a suite of tracers was selected for the next phase of tests. Selection was based on the list of permitted tracers for use at the ESF as well as on availability. Residual tracer is available from the Alluvial Tracer Complex (ATC) testing and therefore selection was limited to these tracers when possible.
Groundwater – Testing; Groundwater tracers; Nevada – Yucca Mountain;
Chemistry | Hydrology
Stetzenbach, K. J.,
Smiecinski, A. J.
Chemical analyses for Alcove 8 Niche 3 tracer studies.
Available at: https://digitalscholarship.unlv.edu/yucca_mtn_pubs/68