Surface sediments definition

Surface sediments or "sediment(s)" means settled particulate matter located in the predominant biologically active aquatic zone, or exposed to the water column. Sedi- ment(s) also includes settled particulate matter exposed by human activity (e.g., dredging) to the biologically active aquatic zone or to the water column.
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Surface sediments or "sediment(s)" means, except for purposes of Part V of this chapter, settled particulate matter located in the predominant biologically active aquatic zone, or exposed to the water column. Sediment(s) also includes settled particulate matter exposed by human activity (e.g., dredging) to the biologically active aquatic zone or to the water column.
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Examples of Surface sediments in a sentence

  • Surface sediments consist of glacial outwash sand and gravel and postglacial alluvium and an end moraine of coarse- textured till.

  • Surface sediments in source areas are likely important reservoirs of DP in the environment (Niu et al.

  • Surface sediments at the site are generally similar to sediments at the NBDS.

  • Surface sediments in C6B and C4 contained mostly clay, which ranged from 22.8% -60.6% and 9.4% -51.3%, respectively.The organic matter content (%LOI) in surface sediments at C4, C6B and C8 ranged from 9.008.007.006.005.004.003.002.00OM (%LOI)MonthC4 C6B C83.219 to 8.217 with average and standard error of 5.116±0.283, 2.840 to 6.710 (average = 3.877±0.187) and 1.950 to 5.565 (average= 3.682±0.232), respectively.

  • This completed the territorial boundaries of what is now the United States.

  • Surface sediments consist of an end moraine of coarse-textured till, coarse-textured till, glacial outwash sand and gravel and postglacial alluvium and lacustrine (lake) sand and gravel.

  • Surface sediments in C8 contained mostly sand (ranging from 18.7% – 98.8%), except one sample which contained 37.5% of clay.

  • Surface sediments collected from 3 box cores were composited and homogenized thoroughly before setting up the experiment.

  • Surface sediments also exhibit environmental variables that may vary on a diel pattern.

  • Surface sediments might be considered as a project segment that is separate from subsurface sediments at the same location if vertical stratification of contamination is expected.

Related to Surface sediments

  • Surface waters means all waters of the state as defined in G.S. 143-212 except underground waters

  • Sedimentation means a process for removal of solids before filtration by gravity or separation.

  • Groundwater means all water, which is below the surface of the ground in the saturation zone and in direct contact with the ground or subsoil.

  • Surface water means all water which is open to the atmosphere and subject to surface runoff.

  • Sediment means solid material, mineral or organic, that is in suspension, is being transported, or has been moved from its site of origin by air, water or gravity as a product of erosion.

  • Soil means all unconsolidated mineral and organic material of any origin.

  • Potable means water suitable for drinking by the public.

  • Subsurface tracer study means the release of a substance tagged with radioactive material for the purpose of tracing the movement or position of the tagged substance in the well-bore or adjacent formation.

  • Underground tank means a device meeting the definition of tank whose entire surface area is totally below the surface of and covered by the ground.

  • Surface impoundment or "impoundment" means a facility or part of a facility which is a natural topographic depression, man-made excavation, or diked area formed primarily of earthen materials (although it may be lined with man-made materials), which is designed to hold an accumulation of liquid wastes or wastes containing free liquids, and which is not an injection well. Examples of surface impoundments are holding, storage, settling, and aeration pits, ponds, and lagoons.

  • Contaminated soil means soil that meets all of the following criteria:

  • Underground injection means the subsurface emplacement of fluids through a bored, drilled or driven well; or through a dug well, where the depth of the dug well is greater than the largest surface dimension. (See also “injection well”.)

  • Navigable waters ’ means the waters of the United States, including the territorial sea;

  • Underground mining means all methods of mining other than surface mining.

  • Tank means an enclosed space which is formed by the permanent structure of a ship and which is designed for the carriage of liquid in bulk.

  • Underground source of drinking water means an aquifer or its portion:

  • Surface owner means any person who holds record title to the surface of the land as an owner.

  • Underground storage tank or “UST” means any one or combination of tanks (including underground pipes connected thereto) that is used to contain an accumulation of regulated substances, and the volume of which (including the volume of underground pipes connected thereto) is 10 percent or more beneath the surface of the ground. This term does not include any:

  • Structures means an elevated road or a flyover, as the case may be;

  • Gravel means stone screened from river sand or quarried and washed free of clay and clay coatings. Concrete aggregate designated as Class II by the department of transportation is acceptable.

  • Drainage means the movement of water to a place of disposal, whether by way of the natural characteristics of the ground surface or by artificial means;

  • Drainage area means a geographic area within which stormwater, sediments, or dissolved materials drain to a particular receiving waterbody or to a particular point along a receiving waterbody.

  • Ambient air means that portion of the atmosphere, external to buildings, to which the general public has access.