USGS Geological Survey

U.S. Geological Survey (ffSGS), Quality of Suface Waters of the Ended States 1956, Parts 1—4, U.S. Geological Survey Water-Supply Paper 1450, USGS, Washington, D.C., 1960. 

California Department of Water Resources, California Water Plan Update Bulletin 160-93, Oct. 1994 W. S. Swain, USGS, personal communication, U.S. Geological Survey, Sacramento, CA, 1996. 

W. B. SoUey, R. R. Pierce, and H. A. Perlman, Estimated Use of Water in the United States in 1990., U.S. Geological Survey Circular 1081, USGS, Denver, Colo., 1993. 

To determine the latitude and longitude of your facility you will need a topographic map from United States Geological Survey (USGS). 

Formulation and Use of Practical Models for River-Quality Assessment, Geology Survey Circular 715-B, USGS, Reston, VA, Washington, D.C., 1975. 

Several studies have been conducted to measure methyl parathion in streams, rivers, and lakes. A U.S. Geological Survey (USGS) of western streams detected methyl parathion in five river samples taken from four states during a 14-month period in 1970 and 1971. The amount of methyl parathion detected ranged from 0.04 to 0.23 pg/L (Schultz et al. 1973). A later and more extensive USGS study analyzed water samples from major rivers of the United States four times yearly in the period of 1975-1985. Of the 2,861 water samples, 0.1% had detectable levels of methyl parathion (Gilliom et al. 1985). In a study of Arkansas surface waters, samples of lake and river/stream water were collected and analyzed over a three-year period (Senseman et al. 1997). Of the 485 samples collected, methyl parathion was found in one river/stream sample at a maximum concentration of 3.5 pg/L. Results from an EPA study in California detected methyl parathion in 3 of 18 surface drain effluent samples at concentrations of 10-190 ng/kg. Subsurface drain effluent water had concentrations of 10-170 ng/kg in 8 of 60 samples (lARC 1983). 

Adapted from Olsen etal. 1999). Abbreviations CWS Canadian Wildlife Service USEPA US Environmental Protection Agency EWS Pish and Wildlife Service NBS National Biological Service NOAA National Oceanic and Atmospheric Administration USGS U.S. Geological Survey. 

Flanagan FJ (1976) U.S. Geological Survey Professional Paper 840 Descriptions and analyses of eight new USGS rock standards. U.S. Government Printing Office Wash DC, 191pp. 

In Kane JS (ed.) U.S. Geological Survey Bulletin 2046. The USGS Reference Sample Devonian Ohio Shale SDO-i pp D1-D5. 

Plan of Study to Determine the Occurrence of Sulfonylurea, Sulfonamide, and Imidazolinone Herbicides in Surface and Ground-Water of the Midwestern United States. US Geological Survey, Washington, DC (1998). Also available on the World Wide Web http //webserver.cr.usgs.gov/midconherh/html/workplan98.html, accessed September 2002. 

Coastal Marine Geology Program US Geological Survey St. Petersburg, Florida, 33701, USA pswar2en usgs.g0v... 

Center for Coastal and Regional Marine Studies US Geological Survey Saint Petersburg, Florida 33701 US.A. pswarzen usgs.gov... 

USGS. 1995. Groundwater monitoring program evaluation report for water year 1995. Rocky Mountain Arsenal, Commerce City, Colorado. United States Geological Survey. 

USGS. 1998. Surface water and groundwater monitoring programs. United States Geological Survey. Rocky Mountain Arsenal, Annual Data Summary, 1997 Water Year. Final Report. 

U.S. Geological Survey, A National Assessment of Volatile Organic Compounds (VOCs) in Water Resources of the U.S. Summer 2003. Available at sd.water.usgs.gov/nawqa/vocns, 2008. 

Models of the above have been presented by various researchers of the U.S. Geological Survey (USGS) and the academia. The above equation has been solved principally (a) numerically over a temporal and spatial discretized domain, via finite difference or finite element mathematical techniques (e.g., 11) (b) analytically, by seeking exact solutions for simplified environmental conditions (e.g., 12) or (c) probabilistically (e.g., 13). 

DOI/USGS. 1997a. Mineral industry surveys. U.S. Department of the Interior-US. Geological Survey. 

SmithGR. 1996. Lead. Recycling—Metals, Minerals Information Team, US. Department of the Interior, U.S. Geological Survey. Lead Statistics and Information, Minerals Yearbook, Recycling Metals, http //minerals.er.usgs.gov/minerals/pubs/commoditv/lead/... 

Welch A.H., Watkins S.A., Helsel D.R., Focazio M.F. Arsenic in groundwater resources of the United States U.S. Geological Survey Fact Sheet 063-00, On line at http //co.water.usgs.gov/trace/pubs/fs-063-00/. US Geological Survey, 2000. 

US Geological Survey, Denver Federal Center, Lakewood, CO, 80225 USA (e-mail mgold usgs.gov)... 

National Uranium Resource Evaluation (NURE) Hydrochemical and Stream Sediment Reconnaissance (HSSR) Program. U.S. Geological Survey Open-File Report 97-492. Available from . 

Soil sampling was conducted across the Canadian Maritime provinces and the US states during 2007 using an established field protocol by the United States Geological Survey (USGS), the Geological Survey of Canada (GSC) and the New Brunswick and Nova Scotia provincial surveys. 

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