Search Results
42. External quality-assurance results for the National Atmospheric Deposition Program/National Trends Network, 1995-96
43. Laboratory study of the response of select insecticides to toxicity identification evaluation procedures
44. Pesticides in streams of the United States-initial results from the National Water-Quality Assessment Program
45. Review of phosphorus control measures in the United States and their effects on water quality
46. Microbiological monitoring for the U.S. Geological Survey National Water-Quality Assessment Program
47. Quality-assurance results for routine water analyses in U.S. Geological Survey laboratories, water year 1998
48. A retrospective analysis on the occurrence of arsenic in ground-water resources of the United States and limitations in drinking-water-supply characterizations
49. An alternative regionalization scheme for defining nutrient criteria for rivers and streams
50. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of moderate-use pesticides and selected degradates in water by C-18 solid-phase extraction and gas chromatography/mass spectrometry
51. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of pesticides in water by graphitized carbon-based solid-phase extraction and high-performance liquid chromatography/mass spectrometry
52. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of pesticides in water by graphitized carbon-based solid-phase extraction and high-performance liquid chromatography/mass spectrometry
53. Occurrence and distribution of methyl tert-butyl ether and other volatile organic compounds in drinking water in the northeast and mid-atlantic regions of the United States, 1993-98
54. Occurrence of selected radionuclides in ground water used for drinking water in the United States : a reconnaissance survey, 1998
55. The search for reliable aqueous solubility (Sw) and octanol-water partition coefficient (Kow) data for hydrophobic organic compounds : DDT and DDE as a case study
56. The search for reliable aqueous solubility (Sw) and octanol-water partition coefficient (Kow) data for hydrophobic organic compounds : DDT and DDE as a case study
57. Selected data from field studies of pesticide runoff to surface waters
58. Stream discharge measurements from cableways
59. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of wastewater compounds by polystyrene-divinylbenzene solid-phase extraction and capillary-column gas chromatography/mass spectrometry
60. Occurrence and status of volatile organic compounds in ground water from rural, untreated, self-supplied domestic wells in the United States, 1986-99
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