This dataset includes microsomal ERDO data from an assay done with liver samples from several fish species that are found in Arizona at sites that are being assessed for PBDE contamination. The data was created in September and October 2016.

For the Ecological Risk Assessment Report, EPA collected these samples, consisting of benthic invertebrates (crayfish), from three contaminated locations in the Carson River upstream from Lahontan Reservoir (Santiago Ruins, Dayton State Park, and Fort Churchill) and one background location (Ruhenstroth Dam). As a component of the ecological assessment for the Carson River Mercury Site, a survey of benthic macroinvertebrates was conducted to evaluate the potential adverse effects of mercury in surface water and sediment of the Carson River. Measures of benthic community response to mercury contamination derived from the benthic survey are presented in this the EcoRisk Assessment, Appendix C. A characterization of the existing environment at the sampling locations-including the habitat characteristics, fish and wildlife populations, and surrounding land use. Rapid BioAssessment Protocol II (RBP) involves the standardized collection, enumeration, and identification of major benthic taxa to the family level in riffle/run habitats. Standard data sheets are used to record results at each sampling. location. Collections are compared to a reference location, and an evaluation is made as to the impairment, or lack thereof, of the benthic community from stressors within the watershed. The biological condition of the community can be ranked according to three categories of impact: nonimpaired, moderately impaired, or severely impaired, where the degree of impairment implies less than optimal community structure, the loss of intolerant species, and dominance by a few tolerant taxa compared to background. RBP II also involves assessment of habitat characteristics such as stream flow, bottom conditions, and riparian vegetation. In addition, standard water quality parameters such as dissolved oxygen, temperature, pH, conductivity, color, and turbidity are determined. The RBP II was conducted on August 17 and 18, 1994 during a period of drought. The EPA is publishing this data in support of the Carson River Mercury NPL Site in Nevada. Data was compiled and evaluated for the OU1 Remedial Investigation Report (EPA, 1994) as well as the OU2 Remedial Investigation Report (EPA, 2017), describing the nature and extent of contamination from the Site, primarily the Ecological Risk Assessment Report. The RI report also contains the Human Health Risk Assessment. Literature and other source Hg data are summarized in the RI for surface waters, sediments, and biological tissues.

Microbenthic data was collected by the Virginia Institute of Marine Science (VIMS) as part of the BLM/OCS Mid (NE) Atlantic program. The data were collected from the R/V G. W. PIERCE from February to March 1976. The data was collected to study the Benthic organisms. Benthic species were counted and benthic taxa were identified. These data were submitted by Dr. Gerald L. Engel. The measurements included station depth; surface and sediment temperature in degrees centigrade; wind speed and direction; wave/swell height and direction; instrumentation; penetration depth; gear type; sediment core dimensions (width and penetration depth in centimeters); depth of sediment corer penetration; cloud cover and turbidity. The documentation includes a detailed record format. Data were originally filed in a VIMS format tape has been converted into current NODC data storage format.

For the Ecological Risk Assessment Report, EPA collected these samples, consisting of benthic invertebrates (crayfish), from three contaminated locations in the Carson River upstream from Lahontan Reservoir (Santiago Ruins, Dayton State Park, and Fort Churchill) and one background location (Ruhenstroth Dam). As a component of the ecological assessment for the Carson River Mercury Site, a survey of benthic macroinvertebrates was conducted to evaluate the potential adverse effects of mercury in surface water and sediment of the Carson River. Measures of benthic community response to mercury contamination derived from the benthic survey are presented in this the EcoRisk Assessment, Appendix C. A characterization of the existing environment at the sampling locations-including the habitat characteristics, fish and wildlife populations, and surrounding land use. Rapid BioAssessment Protocol II (RBP) involves the standardized collection, enumeration, and identification of major benthic taxa to the family level in riffle/run habitats. Standard data sheets are used to record results at each sampling. location. Collections are compared to a reference location, and an evaluation is made as to the impairment, or lack thereof, of the benthic community from stressors within the watershed. The biological condition of the community can be ranked according to three categories of impact: nonimpaired, moderately impaired, or severely impaired, where the degree of impairment implies less than optimal community structure, the loss of intolerant species, and dominance by a few tolerant taxa compared to background. RBP II also involves assessment of habitat characteristics such as stream flow, bottom conditions, and riparian vegetation. In addition, standard water quality parameters such as dissolved oxygen, temperature, pH, conductivity, color, and turbidity are determined. The RBP II was conducted on August 17 and 18, 1994 during a period of drought. The EPA is publishing this data in support of the Carson River Mercury NPL Site in Nevada. Data was compiled and evaluated for the OU1 Remedial Investigation Report (EPA, 1994) as well as the OU2 Remedial Investigation Report (EPA, 2017), describing the nature and extent of contamination from the Site, primarily the Ecological Risk Assessment Report. The RI report also contains the Human Health Risk Assessment. Literature and other source Hg data are summarized in the RI for surface waters, sediments, and biological tissues.

EPA has collected soil, sediment, surface water and biota data to complete the remedial investigation (RI) at the Operable Unit (OU) No. 2 of the Carson River Mercury Superfund Site (CRMS). The goal of the study is to select a remedy that eliminates, reduces, or controls risks from site-related compounds of concern to human health and the environment. Specifically, the RI involves the investigation and study of the heavy metals contamination and the associated tributaries into the Carson River watershed resulting from site-related contaminant migration and to evaluate past and current releases and their impact to human health and the environment. The Site includes mercury-contaminated soils at former mill sites, mercury contamination in waterways adjacent to the mill sites, and mercury contamination in sediments and banks fish and wildlife over more than a 80 mile length of the River, beginning near Carson City, Nevada and extending downstream to the Lahontan Valley and ultimately at its terminus at the USFWS Stillwater National Wildlife Refuge. Contamination at the Site is a legacy of the Comstock mining era of the late 1860s, when mercury was imported to the area for processing of gold and silver ore. Ore mined from the Comstock Lode was transported to the mill sites, where it was crushed and mixed with mercury to amalgamate the precious metals (Washoe Process). The mills were primarily located in Virginia City, Silver City, Gold Hill, Dayton, Six Mile Canyon, Gold Canyon, and adjacent to the Carson River between New Empire and Dayton. During the mining era, an estimated 7,500 tons of mercury were discharged into the River drainage, primarily in the form of mercury-contaminated tailings.

This data set describes blood and tissue samples collected from Mariana common moorhens from 2000-2001 in Guam and Saipan.

The datasets for this investigation consist of microtremor array data collected in three regions of the Puget Lowland, Washington State: 1) western Seattle and Tacoma basins (7 sites), 2) Seattle basin and uplift (17 sites), and 3) Tacoma basin (20 sites).Dataset 1 was acquired with Trillium Compact 20 s-100 Hz three-component (3C) sensors deployed in a ten-sensor nested triangular array with non-uniform sensor spacing; inter-sensor distances ranged from ~57 to ~1000 m. Dataset 2 was acquired with four-sensor triangular arrays with Guralp CMG-40T 3C sensors having flat response from 0.033 Hz to 50 Hz; inter-sensor distances ranged from ~19 to ~300 m. Dataset 3 was acquired with Trillium Compact 3C sensors, as used for dataset 1, deployed in a ten-sensor nested triangular array with uniform sensor spacing; inter-sensor distances ranged from ~19 to ~300 m. Datasets 1 and 3 were recorded on RefTek RT-130 data loggers whereas dataset 2 was recorded on Kinemetrics K2 data loggers. All data are archived as GNU-zipped tar files in binary SAC format.

qPCR detection results for Pacific Lamprey eDNA surveys from Western Washington Rivers and Streams. Water samples were collected via filtration and shipped to the laboratory for analysis. DNA was extracted from filters using commercially available extraction kits. Lab staff used two existing Pacific Lamprey qPCR eDNA surveys to screen DNA extracts for the presence of Pacific Lamprey DNA. Eight molecular replicates were run for each samples. Results presented in this table show the number of positive detections out of 8 for each sample and the corresponding mean Cq values for each sample with a detection.

qPCR detection results for Pacific Lamprey eDNA surveys from Western Washington Rivers and Streams. Water samples were collected via filtration and shipped to the laboratory for analysis. DNA was extracted from filters using commercially available extraction kits. Lab staff used two existing Pacific Lamprey qPCR eDNA surveys to screen DNA extracts for the presence of Pacific Lamprey DNA. Eight molecular replicates were run for each samples. Results presented in this table show the number of positive detections out of 8 for each sample and the corresponding mean Cq values for each sample with a detection.

This data set includes water quality data and microbial community abundance tables for periphyton samples from this project. The data set also includes extensive R markdown code used to process the data and generate the results included in the report. This dataset is associated with the following publication: Hagy, J., R. Devereux, K. Houghton, D. Beddick, T. Pierce, and S. Friedman. Developing Microbial Community Indicators of Nutrient Exposure in Southeast Coastal Plain Streams using a Molecular Approach. US EPA Office of Research and Development, Washington, DC, USA, 2018.