J. Rouse | Geology Reports

USGS2009

A controlled field pilot for testing near surface CO 2 detection techniques and transport models

A field facility has been developed to allow controlled studies of near surface CO 2 transport and detection technologies. The key component of the facility is a shallow, slotted horizontal well divided into six zones. The scale and fluxes were designed to address large scale CO 2 storage projects and desired retention rates for those projects. A wide variety of detection techniques were deployed by collaborators from 6 national labs, 2 universities, EPRI, and the USGS. Additionally, modeling of CO 2 transport and concentrations in the saturated soil and in the vadose zone was conducted. An overview of these results will be presented. ?? 2009 Elsevier Ltd. All rights reserved.

Conference Paper↗

USGS1986

Hydrogeochemistry of sulfide and arsenic-rich tailings and alluvium along Whitewood Creek, South Dakota (Part 1 of 3 parts)

During 100 years prior to 1977, Whitewood Creek, SD, received about 1 billion tons of arsenic-rich and sulfide-mineral rich tailings from gold mining operations. A hydrogeochemical investigation conducted in 1983-84 focused on four local study areas on the flood plain where tailings deposits exist on top of moderately permeable alluvium. Piezometers in the alluvium beneath the tailings commonly show As at concentrations near or above the Primary Drinking Water Limit of 0.05 mg/l. Water supply wells on the flood plain are situated in alluvium in areas away from tailings where As levels in groundwater are below this limit. In these wells, selenium levels are generally above the limit of 0.01 mg/l. Suggested remedial measures and the likely persistence of these contaminants are discussed.

South Dakota↗