Tracy Yager
Biography
Tracy has worked for the USGS for more than 30 years. As a Hydrologist, she has been a Project Chief, authored reports, and worked with researchers on non-routine lab activities. Tracy has worked in various USGS laboratories over the years, including the National Water Quality Laboratory. She was the Lab Manager for a Water Science Center prep laboratory for more than 10 years. She worked with the Quality Systems Branch for about 4 years as the acting Chief of the Laboratory Evaluation Project. Tracy currently is part of the Bureau QMS Work Group, the Water Mission Area QMS Development Team, and the Aquarius Samples Integration Project. She is an employee of the Colorado Water Science Center and works in Denver, Colorado, at the Denver Federal Center.
Science and Products
Quality Systems Branch (QSB)
The USGS Quality Systems Branch (QSB) represents the Water Mission Area’s commitment to generating environmental data of known quality. QSB produces water and sediment performance-assessment samples and data to provide the USGS laboratory users, USGS laboratories, and field personnel with quantitative performance information to assess data quality.
Watershed Contamination from Hard Rock Mining
Since 1986, the USGS Hard-Rock Mining Toxic-Substances Hydrology Project has focused on metal transport in streams affected by mining. Tracer-injection studies in St. Kevin Gulch, near Leadville, Colorado, helped the USGS design methods to characterize loading from mining activities on a watershed scale. Tracer-injection studies were done in 1995, in support of the planning needs of ederal...
Biosolids, soils, crops, ground water, and streambed sediments in the vicinity of a biosolids-application area near Deer Trail, Colorado
The Metro Wastewater Reclamation District (Metro District) applies biosolids throughout their properties (the MetroGro Farm) near Deer Trail, Colorado. These biosolids applications could affect the quality of water in alluvial and bedrock aquifers, streambed sediment, soil, dust, and crops.
Water quality can be directly affected through:
- Contaminated recharge water, or ...