source zone definition

source zone means the bidding zone a LTTR goes from. With a LTTR from bidding zone A to bidding zone B, bidding zone A is the source zone;
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source zone means the portion of the site that contributes contaminant mass to the ground water plume. The source area is usually the location of the original release. The source zone may be defined as several distinct zones or layers. In practice, it includes the free product layer (for petroleum, the free product is commonly located at the ground water interface), contaminated soil in unsaturated and unsaturated zones, the smear zone, and the dissolved phase. For detailed methods for estimating contaminant mass in the source zone, please refer to Appendix D of this guidance.
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Related to source zone

  • overlay zone means a mapped overlay superimposed on one or more established zoning areas which may be used to impose supplemental restrictions on uses in these areas or permit uses otherwise disallowed;

  • Use Zone means the area beneath and surrounding a play structure or piece of equipment that is designated for unrestricted movement around the equipment, and onto which a child falling from or exiting the equipment could be expected to land.

  • Source material means: (1) uranium or thorium, or any combination thereof, in any physical or chemical form or (2) ores which contain by weight one-twentieth of one percent (0.05 percent) or more of (i) uranium, (ii) thorium or (iii) any combination thereof. Source material does not include special nuclear material.

  • resource main means (subject to Section 219(2) of the 1991 Act) any pipe, not being a trunk main, which is or is to be used for the purpose of-

  • Source Materials means uranium containing the mixture of isotopes occurring in nature; uranium whose content in uranium 235 is less than the normal; thorium; any of the foregoing in the form of metal, alloy, chemical compound or concentrate; any other substance containing one or more of the foregoing in such a concentration as shall be specified by the Council, acting by a qualified majority on a proposal from the Commission.