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Maria R. Montour

Publications and source records attributed to Maria R. Montour.

3 recordsLinked to original sources

U.S. Geological Survey activities related to American Indians and Alaska Natives: Fiscal years 2009 and 2010

The U.S. Geological Survey is the earth and natural science bureau within the U.S. Department of the Interior. The U.S. Geological Survey provides impartial information on the health of our ecosystems and environment, the natural hazards that threaten us, the natural resources we rely on, the negative effects of climate and land-use change, and the core science systems that help us provide timely, relevant, and usable information. The U.S. Geological Survey is not responsible for regulations or land management. In the late 1800s, John Wesley Powell the second director of the U.S. Geological Survey, followed his interest in the Tribes of the Great Basin and Colorado Plateau and studied their cultures, languages, and surroundings. From that early time, the U.S. Geological Survey has recognized the importance of Native knowledge as a complement to the U.S. Geological Survey mission to better understand the Earth and its systems. Collaboration allows the U.S. Geological Survey and Native American governments, organizations, and peoples to increase their mutual understanding of the increasing challenges facing our natural world. Although this report uses the term “resources,” the U.S. Geological Survey, through its interdisciplinary research, acknowledges the interconnectedness of the Earth and all the life forms that live upon it.

Circular

EPA method 1312 (synthetic precipitation leaching procedure); leachate chemistry data for solid mine waste composite samples from Silverton and Leadville, Colorado

The EPA Method 1312 Synthetic Precipitation Leaching Procedure (SPLP) leachate chemistry data for mine waste samples is presented. Four mine waste composite samples were collected from Silverton (YUK and MAY) and Leadville (SUN and VEN), Colorado and were extracted following the EPA Method 1312 procedure. Leachate pH values ranged from 2.68 to 3.37 and the samples were ranked by increasing pH: VEN < SUN < YUK < MAY. Specific conductivity values ranged from 203 µS to 1080 µS and the samples were ranked by increasing specific conductivity: MAY < YUK < SUN < VEN. For selected metal concentrations, no consistent pattern presented itself. MAY is the sample that typically has the lowest metal concentrations with the exception of nickel, zinc, and lead. The samples had SPLP leachate concentrations below the EPA Method 1311 Toxicity Characteristic Leaching Procedure (TCLP) regulatory levels.

Colorado