Natural filter definition

Natural filter means the material adjacent to the screens in Type II wells which is part of the screened formation and which is relatively free of fine-grained material as a result of well development.

Examples of Natural filter in a sentence

  • Natural filter facilities can be sized using one of two methods: a simple sizing method or a hydrologic routing modeling method.

  • Natural filter for them can be soil, however with support for the purification process performed by the vegetation.

  • Natural filter packs may be used in caving formations provided that the native materials do not have significant levels of fines that may accumulate within the well screens.

  • This is followed by reading, the key activity that develops the understanding”.

  • Natural filter projects offer a means of reducing nitrogen, phosphorus, and sediment loads into the Chesapeake Bay.

  • The scope of the review covered the roles and responsibilities for raising recharges, administration and debt collection.

  • Natural filter pollution reduction efficiencies differ by region and land use change Best Management PracticePollution Reduction Range (%) Efficiency values often differ between pollutants because nitrogen and phosphorus traverse through the environment via different pathways.

  • Like a facial pack, masoor dal immerses itself in all dirt and removes dirt by removing it gently.[18] Natural filter Exfoliation is a necessary step in skin care, even if it is excessive or completely overlooked.

  • Natural filter materials might include: silica sand, grit marble, crushed granite, diatomite, anthracite, zeolite, pyrolusite.

Related to Natural filter

  • Natural uranium means uranium with the naturally occurring distribution of uranium isotopes, which is approximately 0.711 weight percent uranium-235, and the remainder by weight essentially uranium-238.

  • HEPA filter means a high efficiency particulate absolute air filter capable of trapping and retaining 99.97 percent of fibers greater than 0.3 micrometers in mass median aerodynamic diameter equivalent.

  • Central fill pharmacy means a pharmacy contracting with an originating pharmacy, or having the same owner as an originating pharmacy, that provides centralized prescription drug order filling on behalf of the originating pharmacy pursuant to these rules.

  • SOUND NATURAL TEETH means teeth that: • are free of active or chronic clinical decay; • have at least fifty percent (50%) bony support; • are functional in the arch; and • have not been excessively weakened by multiple dental procedures. SPECIALTY PRESCRIPTION DRUG is a type of prescription drug listed on our formulary that generally is identified by, but not limited to, features such as: • being produced by DNA technology; • treats chronic or long term disease; • requires customized clinical monitoring and patient support; and • needs special handling.

  • Conventional filtration treatment means a series of processes including coagulation, flocculation, sedimentation, and filtration resulting in substantial particulate removal.

  • natural boundary means the visible high water mark of any lake, river, stream or other body of water where the presence and action of the water are so common and usual, and so long continued in all ordinary years, as to mark on the soil of the bed of the body of water a character distinct from that of its banks, in vegetation, as well as in the nature of the soil itself.

  • Natural gas company ’ means a person engaged in the transportation of natural gas in interstate commerce, or the sale in inter- state commerce of such gas for resale.

  • Biological safety cabinet means a containment unit suitable for the preparation of low to moderate risk agents where there is a need for protection of the product, personnel, and environment, according to National Sanitation Foundation (NSF) Standard 49.

  • Natural background means the condition of waters in the absence of man-induced alterations based on the best scientific information available to the Department. The establishment of natural background for an altered waterbody may be based upon a similar unaltered waterbody or on historical pre-alteration data. 62-302.200(15), FAC.

  • Personnel file means, for the purposes of Part III (8VAC20-90-60 et seq.), any and all memoranda, entries or other documents included in the teacher's file as maintained in the central school administration office or in any file regarding the teacher maintained within a school in which the teacher serves.

  • Natural environment means the air, land and water, or any combination or part thereof, of the Province of Ontario; (“environnement naturel”)

  • international air transport means air transport that passes through the airspace over the territory of more than one State;

  • Drywell means an unlined or partially lined underground pit (regardless of geometry) into which drainage from roofs, basement floors, water softeners or other non-wastewater sources is discharged and from which the liquid seeps into the surrounding soil.

  • Diatomaceous earth filtration means a process resulting in substantial particulate removal in which a precoat cake of diatomaceous earth filter media is deposited on a support membrane (septum), and while the water is filtered by passing through the cake on the septum, additional filter media known as body feed is continuously added to the feed water to maintain the permeability of the filter cake.

  • South Caucasus/Central and South Asian (SC/CASA) state means Armenia, Azerbaijan, Georgia, Kazakhstan, Kyrgyzstan, Pakistan, Tajikistan, Turkmenistan, or Uzbekistan.

  • Natural resources means land, fish, wildlife, biota, air, water, ground water, drinking water supplies, and other such resources belonging to, managed by, held in trust by, appertaining to, or otherwise controlled by the United States or the State.

  • GFR means General Financial Rules

  • Natural Resource or “Natural Resources” shall mean land, fish, wildlife, biota, air, water, ground water, drinking water supplies, and other such resources, belonging to, managed by, held in trust by, appertaining to, or otherwise controlled by the United States or the State.

  • Natural attenuation means the reduction in the con- centration and mass of a substance, and the products into which the substance breaks down, due to naturally occurring physical, chemical and biological processes.

  • National Ambient Air Quality Standards or “NAAQS” means national ambient air quality standards that are promulgated pursuant to Section 109 of the Act, 42 U.S.C. § 7409.

  • International air transportation means transportation by air between a place in the United States and a place outside the United States or between two places both of which are outside the United States.

  • Floodplain or flood-prone area means any land area susceptible to being inundated by water from any source (see definition of “flood”).

  • Maritime agency services means activities consisting in representing, within a given geographic area, as an agent the business interests of one or more shipping lines or shipping companies, for the following purposes:

  • Expansion to an existing manufactured home park or subdivision means the preparation of additional sites by the construction of facilities for servicing the lots on which the manufactured homes are to be affixed (including the installation of utilities, the construction of streets, and either final site grading or the pouring of concrete pads).