EPA collected data in 2008 to evaluate the transport of mercury-contaminated water and sediment in the Carson River System in western Nevada. This report summarizes the analytical and field results from a pilot investigation performed to assess mercury contamination. Understanding the sources and transformations of mercury aided in planning future RI activities and pilot studies to assess mercury fate and transport in the Carson River and the Lahontan Reservoir. Soil samples from erosional banks along a 4-mile segment of the Carson River upstream of the Lahontan Reservoir were collected and analyzed in this pilot investigation to characterize mercury variability in exposed banks prone to erosion. This report presents the following information: Results of soil sampling and analysis, evaluation of data quality and compliance with the field sampling plan (FSP), discussion of the data, conclusions and recommendations for further study. The EPA is publishing this data in support of the Carson River Mercury NPL Site in Nevada. Data was compiled and evaluated for the OU2 Remedial Investigation Report (EPA, 2017), which describes the nature and extent of contamination from the Site. The report contains the Human Health Risk Assessment and Ecological Risk Assessment. Literature and other source Hg data are summarized in the RI for surface waters, sediments, and biological tissues.