The dataset contains Rare Earth Element concentration data in groundwater at various sites in the United States where in-situ remediation technologies are used for site management. This dataset is associated with the following publication: Wilkin, R.T., T.R. Lee, R.D. Ludwig, C. Wadler, W. Brandon, B. Mueller, E. Davis, D. Luce, and T. Edwards. Rare-Earth Elements as Natural Tracers for In-situ Remediation of Groundwater. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, USA, 55: 1251-1259, (2021).

The dataset accompanies the manuscript. The data provided include concentration data for trichloroethene, cis-dichloroethene, vinyl chloride, ethane, and ethane. Stable isotope data are provided for trichloroethene, cis-dichloroethene, vinyl chloride, methane, and dissolved carbon dioxide. Additional data are provided in the supporting information published with the article. This dataset is associated with the following publication: Wilkin, R.T., T.R. Lee, M.R. Sexton, S.D. Acree, R.W. Puls, D.W. Blowes, C. Kalinowski, J.M. Tilton, and L.L. Woods. Geochemical and Isotope Study of Trichloroethene Degradation in a Zero-Valent Iron Permeable Reactive Barrier: A Twenty-Two-Year Performance Evaluation. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, USA, 53: 296-306, (2019).

Arsenic (As) toxicity is a global environmental and health problem. There are both natural (eg volcanic activity) and anthropogenic sources of As (eg lead arsenate and copper arsenate were commonly used pesticides in the 1900’s). Aqueous levels of arsenic in the Klamath Basin (CA, OR), which has a volcanic origin, can exceed at some locations both the Oregon Department of Environmental Quality human health water quality criteria (2.1 ug/L) (Sturdevant, 2011) and the US EPA drinking water limit (10 ug/L) (US EPA., 2001). In this study, dissolved concentrations of As, copper (Cu) and lead (Pb) were measured in more than 30 sites within the Klamath Basin between May and October. Results from samples collected between 2018 and 2022 are reported in this data release. References: Sturdevant, Debra., 2011. Water Quality Standards Review and Recommendations: Arsenic (Draft Report). State of Oregon Department of Environmental Quality. https://www.oregon.gov/deq/FilterDocs/AppEArsenicIssuePaper.pdf US EPA., 2001. Drinking Water Standard for Arsenic (Report No. EPA 815-F-00-015). United States Environmental Protection Agency. https://www.epa.gov/dwreginfo/chemical-contaminant-rules

Tap water lead profiles from the Del Toral et al (2013) study, grouped in disturbed and undisturbed Pb service line sites. This dataset is associated with the following publication: Wasserstrom, L., S. Miller , S. Triantafyllidou, M. DeSantis, and M. Schock. Scale Formation under Blended Phosphate Treatment for a Utility with Lead Pipes. Journal AWWA. American Water Works Association, Denver, CO, USA, 109(11): E464-E478, (2017).

The data sets are for Figures 1-8 in the manuscript. This dataset is associated with the following publication: Huling, J.R., S.G. Huling, and R. Ludwig. Enhanced adsorption of arsenic through the oxidative Treatment of Reduced Aquifer Solids. WATER RESEARCH. Elsevier Science Ltd, New York, NY, USA, 123: 183-191, (2017).

The data sets are for Figures 1-8 in the manuscript. This dataset is associated with the following publication: Huling, J.R., S.G. Huling, and R. Ludwig. Enhanced adsorption of arsenic through the oxidative Treatment of Reduced Aquifer Solids. WATER RESEARCH. Elsevier Science Ltd, New York, NY, USA, 123: 183-191, (2017).

In this study, smelter contaminated soil was treated with various soil amendments (ferric sulphate [Fe2(SO4)3], triple superphosphate [TSP] and biochar) to determine their efficacy in immobilizing soil lead (Pb) and arsenic (As). XAS were collected on soils and mine waste materials at the Materials Research Collaborative Access Team 10-BM for As and 10-ID for Pb, Advanced Photon Source at Argonne National Laboratory. Arsenic XAS data collection at 10-BM was measured at the As K edge (11867 eV) using a 4-element Vortex fluorescence detector. Four layers of aluminum foil to filter out background fluorescence from iron and other elements in the samples. Three to five step scans were collected in fluorescence by Vortex detector at 45° incident to sample and down beam transmission on energy calibration standard. Energy was calibrated to set at the 1st derivative inflection point zero of sodium arsenate standard to 11874 eV. Data were then background subtracted and converted to k space for EXAFS region analysis. Data processed for EXAFS analysis were k3-weighted and all e0 set to 11870 eV for uniform k range start energy. Spline range was 0.5-12 k. Lead XAS data collection at 10-ID utilized a Si(111) mono to tune energy to the Pb L3-edge (13035 eV). Samples were measured in fluorescence using a Mirion-Canberra 7-element Ge detector at 45° incident to the sample. For each sample, three to five scans were collected in both transmission and fluorescence mode with a Pb foil for reference sample. Calibration was performed by assigning the first derivative inflection point of Pb foil scan to 13035 eV. Analysis of Pb spectra utilized LCF of the 1st derivative norm(E) from -20 to 80 eV from e0, constraints of all weights between 0 and 1 and sum of weights normalized to 1. Standards were sequentially removed based on statistical improvement of fit. Components contributing less than ten percent were removed, followed by refitting with remaining components. The combination of standards resulting in the lowest R-factor results for each sample was reported. Arsenic spectra were analyzed LCF utilizing the EXAFS range of spectra. Preliminary data checking indicated As oxidation states of all samples contained only AsV as confirmed by matching edge position with the sodium arsenate pellet used for energy calibration. As EXAFS range were utilized for quantitative speciation from a k-range of 3-10 Å-1. This dataset is associated with the following publication: Alankarage, D., A. Betts, K.G. Scheckel, C. Herde, M. Cavallaro, and A.L. Juhasz. Remediation options to reduce bioaccessible and bioavailable lead and arsenic at a smelter impacted site - consideration of treatment efficacy. ENVIRONMENTAL POLLUTION. Elsevier Science Ltd, New York, NY, USA, 341: 122881, (2024).

The objective of this research was to evaluate the performance of five arsenic adsorptive media technology of full-scale drinking water treatment systems in the USEPA Arsenic Demonstration Program (ADP) that were found to simultaneously remove other co-occurring inorganic contaminants. The datasets presented here are the figures included in the referenced journal article. This dataset is associated with the following publication: Sorg, T., A. Chen, L. Wang, and D. Lytle. Removing co-occurring contaminants of arsenic and vanadium with full-scale arsenic adsorptive media systems. JOURNAL OF WATER SUPPLY: RESEARCH AND TECHNOLOGY - AQUA. IWA Publishing, London, UK, ( ): 2021148, (2021).

The data set contains the elemental composition, pH, and surface area, TOC, IC and bulk density of the soils to be deposited in a repository. Additionally, contains the leaching results of the TCLP, SPLP, and a Controlled Acidity Leaching Protocol and the results of the sequential extraction performed with such soils. This dataset is associated with the following publication: Pinto, P., and S. Al-Abed. Assessing Metal Mobilization from Industrially Lead-Contaminated Soils Located at an Urban Site. W. Berry Lyons, Christopher B. Gardner, and David T. Long APPLIED GEOCHEMISTRY. Elsevier Science Ltd, New York, NY, USA, 83: 31-40, (2017).