2007, ISBN: 9781234515850

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 42 pages. Original publisher: Reston, Va. : U. S. Geological Survey, 2007. OCLC Number: (OCoLC)137238878 Subjec… Mehr…

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 42 pages. Original publisher: Reston, Va. : U. S. Geological Survey, 2007. OCLC Number: (OCoLC)137238878 Subject: Groundwater -- Saint Lawrence River Watershed. Excerpt: . . . Methods of Investigation The methods used in this study, including ( 1 ) well-selection criteria, ( 2 ) sampling procedures, and ( 3 ) analytical methods, were designed to maximize data precision, accuracy, and comparability. Ground-water sample collection and processing were conducted in accordance with standard USGS procedures ( U. S. Geological Survey, variously dated ). Samples were analyzed at four laboratories including the USGS National Water Quality Laboratory ( NWQL ) in Denver, Colo. , the USGS Organic Geochemistry Research Laboratory ( OGRL ) in Lawrence Kans. , and two NYSDOH-certified laboratories using documented methods. Site Selection Wells were selected for sampling to provide adequate spatial coverage of the basin, with emphasis on areas of greatest ground-water use; selection was based on the availability of hydrogeologic information about each well and its surrounding area. More wells finished in bedrock were sampled than wells finished in sand and gravel owing to the general predominance of bedrock wells in many areas of the basin. The 25 wells selected for sampling represented forested, rural, residential, and agricultural areas. Locations of the wells are shown in figure 2; the characteristics of the wells sampled and the land cover surrounding each is listed in table 1. The project did not target specific municipal, industrial, or agricultural practices. Water samples were collected from 5 domestic wells and 3 production wells completed in glacial sand and gravel aquifers; and from 9 domestic and 8 production wells completed in bedrock aquifers. The 14 domestic wells were selected based on information from the NYSDEC Water Well program, which began in 2000. The program requires that licensed well drillers file a report with NYSDEC containing basic information about each well drill. . . This item ships from La Vergne,TN., RareBooksClub<