Examples include, arsenic, chromium, lead and mercury. Herbicides Chemicals used to kill undesirable vegetation. Hydrogeologic Study A study of an area's geology, ground water and ground water movement. Drift Ion An electrically charged atom or group of atoms. J K L Leachate Liquids that have percolated through a soil that carry substances in solution or suspension.
Liquids can be rain water or snow melt that enter soil and carry contaminates from buried wastes.
Leachate can seep into ground or surface water, or pool on or around a landfill. M Macrohabitat A contiguous volumetric region in a river channel that is characterized by similar depth, velocity, and substrate with dimensions on the order of bankfull channel width. A well installed at a site to determine the direction of ground water flow, levels of contamination and other ground water characteristics. N Natural Cycle A series of events in nature that repeat over and over, usually involving a complete process of growth or action. Nutrient A substance that provides food or nourishment, such as usable proteins, vitamins, minerals or carbohydrates.