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Filters Date Range Past year (3) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts California Water Science Center Sylvia V Stork U.S. Geological Survey - ScienceBase Sarah E Janssen Charles N Alpers More... Categories Data Release - Revised (1) Tag Types Theme (3) Place (3) Harvest Set (3) USGS Scientific Topic Keyword (2) Tag Schemes USGS Thesaurus (3) Common geographic areas (3) Marine Realms Information Bank (MRIB) keywords (2) ISO 19115 Topic Category (2) None (1) Groundwater (1) View Results as: JSON ATOM CSV

Attributed California Water Supply Well Completion Report Data for Selected Areas, Derived from CA WCR OSCWR Data (ver. 2.0, January 2023) This Well Completion Report geospatial dataset represents an index to a subset of records available from the California Department of Water Resources' (DWR) Online System for Well Completion Reports (OSWCR). This release contains water supply well records from Amador, Calaveras, El Dorado, Nevada, Placer, Sacramento, San Bernardino, Sutter, and Yuba counties. The USGS California Water Science Center GAMA project has provided additional attributes: top of open interval; number of open intervals; and various other identifiers such as public supply well number and USGS site number where they can be identified. In some cases, locations are georeferenced to finer resolution based on county APN or 911 geospatial datasets.... Categories: Data, Data Release - Revised; Tags: California, USGS Science Data Catalog (SDC), Well Completion Report, geoscientificInformation, groundwater, All tags... inlandWaters, rocks and deposits, water, water well, well drilling, Fewer tags Geochemical and mineralogical data for mine waste from Sulphur Bank Mercury Mine, Lake County, California This data release presents geochemical and mineralogical data from mine waste at Sulphur Bank Mercury Mine (SBMM). This work is performed in cooperation with the US Environmental Protection Agency (EPA) to characterize sources of contamination at the SBMM cleanup site. A total of 23 samples were collected: 15 samples were collected by USGS from various waste piles (14 composites from the top 0-5cm of material, and one composite from six discrete ore hand samples), six composite samples were generated from drill cores from monitoring wells installed by EPA contractor EA Engineering, Science, and Technology, Inc., in the waste rock dam in 2022. Two additional hand samples - one cinderblock and one scoria - were collected... Categories: Data; Tags: California, Clearlake Oaks, Geochemistry, Lake, North America, All tags... Sulphur Bank Rancheria, USGS Science Data Catalog (SDC), United States, Upper Cache, geochemistry, geoscientificInformation, mine waste, mineralogy, Fewer tags Mercury stable isotopes in biota, sediment, groundwater, and waste piles, Clear Lake area, Lake County, California, 2019-2022 Samples were collected from Clear Lake, California from 2019-2022 by the U.S. Geological Survey (USGS) California Water Science Center, the USGS Forest and Rangeland Ecosystem Science Center (FRESC), the US Environmental Protection Agency, and EA Engineering Science and Technology Inc. to assess the extent and cycling of legacy mercury (Hg) contamination from Sulphur Bank Mine. Samples of waste rock, sediments, groundwater, and biological tissue (zooplankton, bluegill, smallmouth bass, Mississippi silversides, and largemouth bass) were analyzed for Hg stable isotopes by the U.S. Geological Survey Mercury Research Laboratory. Mercury concentrations for sediments, waste rocks, and groundwaters are included within... Categories: Data; Tags: California, Clear Lake, California, Environmental Health, Lake County, California, USGS Science Data Catalog (SDC), All tags... fish, groundwater, isotopic analysis, mercury contamination, mine waste, sediment, Fewer tags